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authorGavin Howard <yzena.tech@gmail.com>2018-03-10 21:14:59 -0700
committerRob Landley <rob@landley.net>2018-03-11 14:38:02 -0500
commitfac8b8e6632a2efc5192a1692881c8e00a7d2ba3 (patch)
treebc1cf8e26a4a60599425affa2d10fdc47a697c8c
parente85bab2c970361440b2d80f296237e9eb6d2bbb6 (diff)
downloadtoybox-fac8b8e6632a2efc5192a1692881c8e00a7d2ba3.tar.gz
Add bc to pending
Diffstat
-rw-r--r--toys/pending/bc.c9321
1 files changed, 9321 insertions, 0 deletions
diff --git a/toys/pending/bc.c b/toys/pending/bc.c
new file mode 100644
index 00000000..63dd0f84
--- /dev/null
+++ b/toys/pending/bc.c
@@ -0,0 +1,9321 @@
+/* bc.c - An implementation of POSIX bc.
+ *
+ * Copyright 2018 Gavin D. Howard <yzena.tech@gmail.com>
+ *
+ * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/bc.html
+
+USE_BC(NEWTOY(bc, "cilqsw", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
+
+config BC
+ bool "bc"
+ default n
+ help
+ usage: bc [-cilqsw] [file ...]
+
+ bc is a command-line calculator with a Turing-complete language.
+
+ options:
+
+ -c print generated code (for debugging)
+ -i force interactive mode
+ -l use predefined math routines:
+
+ s(expr) = sine of expr in radians
+ c(expr) = cosine of expr in radians
+ a(expr) = arctangent of expr, returning radians
+ l(expr) = natural log of expr
+ e(expr) = raises e to the power of expr
+ j(n, x) = Bessel function of integer order n of x
+
+ -q don't print version and copyright
+ -s error if any non-POSIX extensions are used
+ -w warn if any non-POSIX extensions are used
+
+*/
+
+#include <assert.h>
+#include <stdbool.h>
+
+#define FOR_bc
+#include "toys.h"
+
+GLOBALS(
+ long bc_code;
+ long bc_interactive;
+ long bc_std;
+ long bc_warn;
+
+ long bc_signal;
+)
+
+#define bcg (TT)
+
+#define BC_FLAG_WARN (1<<0)
+#define BC_FLAG_STANDARD (1<<1)
+#define BC_FLAG_QUIET (1<<2)
+#define BC_FLAG_MATHLIB (1<<3)
+#define BC_FLAG_INTERACTIVE (1<<4)
+#define BC_FLAG_CODE (1<<5)
+
+#define BC_MAX(a, b) ((a) > (b) ? (a) : (b))
+
+#define BC_MIN(a, b) ((a) < (b) ? (a) : (b))
+
+#define BC_INVALID_IDX ((size_t) -1)
+
+#define BC_BASE_MAX_DEF (99)
+#define BC_DIM_MAX_DEF (2048)
+#define BC_SCALE_MAX_DEF (99)
+#define BC_STRING_MAX_DEF (1024)
+
+typedef enum BcStatus {
+
+ BC_STATUS_SUCCESS,
+
+ BC_STATUS_MALLOC_FAIL,
+ BC_STATUS_IO_ERR,
+
+ BC_STATUS_INVALID_PARAM,
+
+ BC_STATUS_INVALID_OPTION,
+
+ BC_STATUS_NO_LIMIT,
+ BC_STATUS_INVALID_LIMIT,
+
+ BC_STATUS_VEC_OUT_OF_BOUNDS,
+
+ BC_STATUS_VECO_OUT_OF_BOUNDS,
+ BC_STATUS_VECO_ITEM_EXISTS,
+
+ BC_STATUS_LEX_INVALID_TOKEN,
+ BC_STATUS_LEX_NO_STRING_END,
+ BC_STATUS_LEX_NO_COMMENT_END,
+ BC_STATUS_LEX_EOF,
+
+ BC_STATUS_PARSE_INVALID_TOKEN,
+ BC_STATUS_PARSE_INVALID_EXPR,
+ BC_STATUS_PARSE_INVALID_PRINT,
+ BC_STATUS_PARSE_INVALID_FUNC,
+ BC_STATUS_PARSE_INVALID_ASSIGN,
+ BC_STATUS_PARSE_NO_AUTO,
+ BC_STATUS_PARSE_LIMITS,
+ BC_STATUS_PARSE_QUIT,
+ BC_STATUS_PARSE_MISMATCH_NUM_FUNCS,
+ BC_STATUS_PARSE_DUPLICATE_LOCAL,
+ BC_STATUS_PARSE_EOF,
+ BC_STATUS_PARSE_BUG,
+
+ BC_STATUS_MATH_NEGATIVE,
+ BC_STATUS_MATH_NON_INTEGER,
+ BC_STATUS_MATH_OVERFLOW,
+ BC_STATUS_MATH_DIVIDE_BY_ZERO,
+ BC_STATUS_MATH_NEG_SQRT,
+ BC_STATUS_MATH_INVALID_STRING,
+ BC_STATUS_MATH_INVALID_TRUNCATE,
+
+ BC_STATUS_EXEC_FILE_ERR,
+ BC_STATUS_EXEC_MISMATCHED_PARAMS,
+ BC_STATUS_EXEC_UNDEFINED_FUNC,
+ BC_STATUS_EXEC_UNDEFINED_VAR,
+ BC_STATUS_EXEC_UNDEFINED_ARRAY,
+ BC_STATUS_EXEC_FILE_NOT_EXECUTABLE,
+ BC_STATUS_EXEC_SIGACTION_FAIL,
+ BC_STATUS_EXEC_INVALID_SCALE,
+ BC_STATUS_EXEC_INVALID_IBASE,
+ BC_STATUS_EXEC_INVALID_OBASE,
+ BC_STATUS_EXEC_INVALID_STMT,
+ BC_STATUS_EXEC_INVALID_EXPR,
+ BC_STATUS_EXEC_INVALID_STRING,
+ BC_STATUS_EXEC_STRING_LEN,
+ BC_STATUS_EXEC_INVALID_NAME,
+ BC_STATUS_EXEC_ARRAY_LENGTH,
+ BC_STATUS_EXEC_INVALID_READ_EXPR,
+ BC_STATUS_EXEC_RECURSIVE_READ,
+ BC_STATUS_EXEC_PRINT_ERR,
+ BC_STATUS_EXEC_INVALID_CONSTANT,
+ BC_STATUS_EXEC_INVALID_LVALUE,
+ BC_STATUS_EXEC_INVALID_RETURN,
+ BC_STATUS_EXEC_INVALID_LABEL,
+ BC_STATUS_EXEC_INVALID_TYPE,
+ BC_STATUS_EXEC_INVALID_STACK,
+ BC_STATUS_EXEC_HALT,
+
+ BC_STATUS_POSIX_NAME_LEN,
+ BC_STATUS_POSIX_SCRIPT_COMMENT,
+ BC_STATUS_POSIX_INVALID_KEYWORD,
+ BC_STATUS_POSIX_DOT_LAST,
+ BC_STATUS_POSIX_RETURN_PARENS,
+ BC_STATUS_POSIX_BOOL_OPS,
+ BC_STATUS_POSIX_REL_OUTSIDE,
+ BC_STATUS_POSIX_MULTIPLE_REL,
+ BC_STATUS_POSIX_MISSING_FOR_INIT,
+ BC_STATUS_POSIX_MISSING_FOR_COND,
+ BC_STATUS_POSIX_MISSING_FOR_UPDATE,
+ BC_STATUS_POSIX_FUNC_HEADER_LEFT_BRACE,
+
+} BcStatus;
+
+typedef void (*BcFreeFunc)(void*);
+typedef BcStatus (*BcCopyFunc)(void*, void*);
+
+// ** Exclude start.
+typedef struct BcGlobals {
+
+ long bc_code;
+ long bc_interactive;
+ long bc_std;
+ long bc_warn;
+
+ long bc_signal;
+
+} BcGlobals;
+
+void bc_error(BcStatus status);
+void bc_error_file(BcStatus status, const char *file, uint32_t line);
+
+BcStatus bc_posix_error(BcStatus status, const char *file,
+ uint32_t line, const char *msg);
+
+#define BC_VEC_INITIAL_CAP (32)
+
+typedef int (*BcVecCmpFunc)(void*, void*);
+
+typedef struct BcVec {
+
+ uint8_t *array;
+ size_t len;
+ size_t cap;
+ size_t size;
+
+ BcFreeFunc dtor;
+
+} BcVec;
+
+typedef struct BcVecO {
+
+ BcVec vec;
+ BcVecCmpFunc cmp;
+
+} BcVecO;
+
+typedef signed char BcDigit;
+
+typedef struct BcNum {
+
+ BcDigit *num;
+ size_t rdx;
+ size_t len;
+ size_t cap;
+ bool neg;
+
+} BcNum;
+
+#define BC_NUM_MIN_BASE (2)
+
+#define BC_NUM_MAX_INPUT_BASE (16)
+
+#define BC_NUM_MAX_OUTPUT_BASE (99)
+
+#define BC_NUM_DEF_SIZE (16)
+
+#define BC_NUM_FROM_CHAR(c) ((c) -'0')
+
+#define BC_NUM_TO_CHAR(n) ((n) + '0')
+
+#define BC_NUM_PRINT_WIDTH (69)
+
+#define BC_NUM_ZERO(n) (!(n)->len)
+
+#define BC_NUM_ONE(n) ((n)->len == 1 && (n)->rdx == 0 && (n)->num[0] == 1)
+
+#define BC_NUM_POS_ONE(n) (BC_NUM_ONE(n) && !(n)->neg)
+#define BC_NUM_NEG_ONE(n) (BC_NUM_ONE(n) && (n)->neg)
+
+typedef BcStatus (*BcNumUnaryFunc)(BcNum*, BcNum*, size_t);
+typedef BcStatus (*BcNumBinaryFunc)(BcNum*, BcNum*, BcNum*, size_t);
+
+typedef BcStatus (*BcNumDigitFunc)(unsigned long, size_t, size_t*, FILE*);
+
+BcStatus bc_num_init(BcNum *n, size_t request);
+
+BcStatus bc_num_expand(BcNum *n, size_t request);
+
+void bc_num_free(void *num);
+
+BcStatus bc_num_copy(void *dest, void *src);
+
+BcStatus bc_num_long(BcNum *n, long *result);
+BcStatus bc_num_ulong(BcNum *n, unsigned long *result);
+
+BcStatus bc_num_long2num(BcNum *n, long val);
+BcStatus bc_num_ulong2num(BcNum *n, unsigned long val);
+
+BcStatus bc_num_truncate(BcNum *n);
+
+BcStatus bc_num_add(BcNum *a, BcNum *b, BcNum *result, size_t scale);
+BcStatus bc_num_sub(BcNum *a, BcNum *b, BcNum *result, size_t scale);
+BcStatus bc_num_mul(BcNum *a, BcNum *b, BcNum *result, size_t scale);
+BcStatus bc_num_div(BcNum *a, BcNum *b, BcNum *result, size_t scale);
+BcStatus bc_num_mod(BcNum *a, BcNum *b, BcNum *result, size_t scale);
+
+int bc_num_compare(BcNum *a, BcNum *b);
+
+void bc_num_zero(BcNum *n);
+void bc_num_one(BcNum *n);
+void bc_num_ten(BcNum *n);
+
+#define BC_PROGRAM_MAX_STMTS (128)
+
+#define BC_PROGRAM_DEF_SIZE (16)
+
+typedef enum BcExprType {
+
+ BC_EXPR_INC_PRE,
+ BC_EXPR_DEC_PRE,
+
+ BC_EXPR_INC_POST,
+ BC_EXPR_DEC_POST,
+
+ BC_EXPR_NEGATE,
+
+ BC_EXPR_POWER,
+
+ BC_EXPR_MULTIPLY,
+ BC_EXPR_DIVIDE,
+ BC_EXPR_MODULUS,
+
+ BC_EXPR_PLUS,
+ BC_EXPR_MINUS,
+
+ BC_EXPR_REL_EQUAL,
+ BC_EXPR_REL_LESS_EQ,
+ BC_EXPR_REL_GREATER_EQ,
+ BC_EXPR_REL_NOT_EQ,
+ BC_EXPR_REL_LESS,
+ BC_EXPR_REL_GREATER,
+
+ BC_EXPR_BOOL_NOT,
+
+ BC_EXPR_BOOL_OR,
+ BC_EXPR_BOOL_AND,
+
+ BC_EXPR_ASSIGN_POWER,
+ BC_EXPR_ASSIGN_MULTIPLY,
+ BC_EXPR_ASSIGN_DIVIDE,
+ BC_EXPR_ASSIGN_MODULUS,
+ BC_EXPR_ASSIGN_PLUS,
+ BC_EXPR_ASSIGN_MINUS,
+ BC_EXPR_ASSIGN,
+
+ BC_EXPR_NUMBER,
+ BC_EXPR_VAR,
+ BC_EXPR_ARRAY_ELEM,
+
+ BC_EXPR_FUNC_CALL,
+
+ BC_EXPR_SCALE_FUNC,
+ BC_EXPR_SCALE,
+ BC_EXPR_IBASE,
+ BC_EXPR_OBASE,
+ BC_EXPR_LAST,
+ BC_EXPR_LENGTH,
+ BC_EXPR_READ,
+ BC_EXPR_SQRT,
+
+ BC_EXPR_PRINT,
+
+} BcExprType;
+
+typedef struct BcEntry {
+
+ char *name;
+ size_t idx;
+
+} BcEntry;
+
+typedef struct BcAuto {
+
+ char *name;
+ bool var;
+
+ union {
+
+ BcNum num;
+ BcVec array;
+
+ } data;
+
+} BcAuto;
+
+typedef struct BcFunc {
+
+ BcVec code;
+
+ BcVec labels;
+
+ BcVec params;
+
+ BcVec autos;
+
+} BcFunc;
+
+typedef BcNum BcVar;
+
+typedef BcVec BcArray;
+
+typedef enum BcResultType {
+
+ BC_RESULT_INTERMEDIATE,
+
+ BC_RESULT_CONSTANT,
+
+ BC_RESULT_VAR,
+ BC_RESULT_ARRAY,
+
+ BC_RESULT_SCALE,
+ BC_RESULT_LAST,
+ BC_RESULT_IBASE,
+ BC_RESULT_OBASE,
+
+ BC_RESULT_ONE,
+
+} BcResultType;
+
+typedef struct BcResult {
+
+ BcResultType type;
+
+ union {
+
+ BcNum num;
+
+ struct {
+
+ char *name;
+ size_t idx;
+
+ } id;
+
+ } data;
+
+} BcResult;
+
+typedef struct BcInstPtr {
+
+ size_t func;
+ size_t idx;
+ size_t len;
+
+} BcInstPtr;
+
+typedef BcStatus (*BcDataInitFunc)(void*);
+
+BcStatus bc_auto_init(void *auto1, char *name, bool var);
+void bc_auto_free(void *auto1);
+
+#define BC_INST_CALL ((uint8_t) 'C')
+#define BC_INST_RETURN ((uint8_t) 'R')
+#define BC_INST_RETURN_ZERO ((uint8_t) '$')
+
+#define BC_INST_READ ((uint8_t) 'r')
+
+#define BC_INST_JUMP ((uint8_t) 'J')
+#define BC_INST_JUMP_NOT_ZERO ((uint8_t) 'n')
+#define BC_INST_JUMP_ZERO ((uint8_t) 'z')
+
+#define BC_INST_PUSH_VAR ((uint8_t) 'V')
+#define BC_INST_PUSH_ARRAY ((uint8_t) 'A')
+
+#define BC_INST_PUSH_LAST ((uint8_t) 'L')
+#define BC_INST_PUSH_SCALE ((uint8_t) '.')
+#define BC_INST_PUSH_IBASE ((uint8_t) 'I')
+#define BC_INST_PUSH_OBASE ((uint8_t) 'O')
+
+#define BC_INST_SCALE_FUNC ((uint8_t) 'a')
+#define BC_INST_LENGTH ((uint8_t) 'l')
+#define BC_INST_SQRT ((uint8_t) 'q')
+
+#define BC_INST_PUSH_NUM ((uint8_t) 'N')
+#define BC_INST_POP ((uint8_t) 'P')
+#define BC_INST_INC_DUP ((uint8_t) 'E')
+#define BC_INST_DEC_DUP ((uint8_t) 'D')
+
+#define BC_INST_INC ((uint8_t) 'e')
+#define BC_INST_DEC ((uint8_t) 'd')
+
+#define BC_INST_HALT ((uint8_t) 'H')
+
+#define BC_INST_PRINT ((uint8_t) 'p')
+#define BC_INST_PRINT_EXPR ((uint8_t) 'Q')
+#define BC_INST_STR ((uint8_t) 's')
+#define BC_INST_PRINT_STR ((uint8_t) 'S')
+
+#define BC_INST_OP_POWER ((uint8_t) '^')
+#define BC_INST_OP_MULTIPLY ((uint8_t) '*')
+#define BC_INST_OP_DIVIDE ((uint8_t) '/')
+#define BC_INST_OP_MODULUS ((uint8_t) '%')
+#define BC_INST_OP_PLUS ((uint8_t) '+')
+#define BC_INST_OP_MINUS ((uint8_t) '-')
+
+#define BC_INST_OP_REL_EQUAL ((uint8_t) '=')
+#define BC_INST_OP_REL_LESS_EQ ((uint8_t) ';')
+#define BC_INST_OP_REL_GREATER_EQ ((uint8_t) '?')
+#define BC_INST_OP_REL_NOT_EQ ((uint8_t) '~')
+#define BC_INST_OP_REL_LESS ((uint8_t) '<')
+#define BC_INST_OP_REL_GREATER ((uint8_t) '>')
+
+#define BC_INST_OP_BOOL_NOT ((uint8_t) '!')
+
+#define BC_INST_OP_BOOL_OR ((uint8_t) '|')
+#define BC_INST_OP_BOOL_AND ((uint8_t) '&')
+
+#define BC_INST_OP_NEGATE ((uint8_t) '_')
+
+#define BC_INST_OP_ASSIGN_POWER ((uint8_t) '`')
+#define BC_INST_OP_ASSIGN_MULTIPLY ((uint8_t) '{')
+#define BC_INST_OP_ASSIGN_DIVIDE ((uint8_t) '}')
+#define BC_INST_OP_ASSIGN_MODULUS ((uint8_t) '@')
+#define BC_INST_OP_ASSIGN_PLUS ((uint8_t) '[')
+#define BC_INST_OP_ASSIGN_MINUS ((uint8_t) ']')
+#define BC_INST_OP_ASSIGN ((uint8_t) ',')
+
+typedef int (*BcIoGetc)(void*);
+
+#define bc_io_gets(buf, n) bc_io_fgets((buf), (n), stdin)
+#define bc_io_getline(p, n) bc_io_fgetline((p), (n), stdin)
+
+#define BC_LEX_GEN_ENUM(ENUM) ENUM,
+#define BC_LEX_GEN_STR(STRING) #STRING,
+
+// BC_LEX_OP_NEGATE is not used in lexing;
+// it is only for parsing.
+#define BC_LEX_TOKEN_FOREACH(TOKEN) \
+ TOKEN(BC_LEX_OP_INC) \
+ TOKEN(BC_LEX_OP_DEC) \
+ \
+ TOKEN(BC_LEX_OP_NEGATE) \
+ \
+ TOKEN(BC_LEX_OP_POWER) \
+ \
+ TOKEN(BC_LEX_OP_MULTIPLY) \
+ TOKEN(BC_LEX_OP_DIVIDE) \
+ TOKEN(BC_LEX_OP_MODULUS) \
+ \
+ TOKEN(BC_LEX_OP_PLUS) \
+ TOKEN(BC_LEX_OP_MINUS) \
+ \
+ TOKEN(BC_LEX_OP_REL_EQUAL) \
+ TOKEN(BC_LEX_OP_REL_LESS_EQ) \
+ TOKEN(BC_LEX_OP_REL_GREATER_EQ) \
+ TOKEN(BC_LEX_OP_REL_NOT_EQ) \
+ TOKEN(BC_LEX_OP_REL_LESS) \
+ TOKEN(BC_LEX_OP_REL_GREATER) \
+ \
+ TOKEN(BC_LEX_OP_BOOL_NOT) \
+ \
+ TOKEN(BC_LEX_OP_BOOL_OR) \
+ TOKEN(BC_LEX_OP_BOOL_AND) \
+ \
+ TOKEN(BC_LEX_OP_ASSIGN_POWER) \
+ TOKEN(BC_LEX_OP_ASSIGN_MULTIPLY) \
+ TOKEN(BC_LEX_OP_ASSIGN_DIVIDE) \
+ TOKEN(BC_LEX_OP_ASSIGN_MODULUS) \
+ TOKEN(BC_LEX_OP_ASSIGN_PLUS) \
+ TOKEN(BC_LEX_OP_ASSIGN_MINUS) \
+ TOKEN(BC_LEX_OP_ASSIGN) \
+ \
+ TOKEN(BC_LEX_NEWLINE) \
+ \
+ TOKEN(BC_LEX_WHITESPACE) \
+ \
+ TOKEN(BC_LEX_LEFT_PAREN) \
+ TOKEN(BC_LEX_RIGHT_PAREN) \
+ \
+ TOKEN(BC_LEX_LEFT_BRACKET) \
+ TOKEN(BC_LEX_RIGHT_BRACKET) \
+ \
+ TOKEN(BC_LEX_LEFT_BRACE) \
+ TOKEN(BC_LEX_RIGHT_BRACE) \
+ \
+ TOKEN(BC_LEX_COMMA) \
+ TOKEN(BC_LEX_SEMICOLON) \
+ \
+ TOKEN(BC_LEX_STRING) \
+ TOKEN(BC_LEX_NAME) \
+ TOKEN(BC_LEX_NUMBER) \
+ \
+ TOKEN(BC_LEX_KEY_AUTO) \
+ TOKEN(BC_LEX_KEY_BREAK) \
+ TOKEN(BC_LEX_KEY_CONTINUE) \
+ TOKEN(BC_LEX_KEY_DEFINE) \
+ TOKEN(BC_LEX_KEY_ELSE) \
+ TOKEN(BC_LEX_KEY_FOR) \
+ TOKEN(BC_LEX_KEY_HALT) \
+ TOKEN(BC_LEX_KEY_IBASE) \
+ TOKEN(BC_LEX_KEY_IF) \
+ TOKEN(BC_LEX_KEY_LAST) \
+ TOKEN(BC_LEX_KEY_LENGTH) \
+ TOKEN(BC_LEX_KEY_LIMITS) \
+ TOKEN(BC_LEX_KEY_OBASE) \
+ TOKEN(BC_LEX_KEY_PRINT) \
+ TOKEN(BC_LEX_KEY_QUIT) \
+ TOKEN(BC_LEX_KEY_READ) \
+ TOKEN(BC_LEX_KEY_RETURN) \
+ TOKEN(BC_LEX_KEY_SCALE) \
+ TOKEN(BC_LEX_KEY_SQRT) \
+ TOKEN(BC_LEX_KEY_WHILE) \
+ \
+ TOKEN(BC_LEX_EOF) \
+ \
+ TOKEN(BC_LEX_INVALID) \
+
+typedef enum BcLexTokenType {
+ BC_LEX_TOKEN_FOREACH(BC_LEX_GEN_ENUM)
+} BcLexTokenType;
+
+typedef struct BcLexToken {
+
+ BcLexTokenType type;
+ char *string;
+
+} BcLexToken;
+
+typedef struct BcLex {
+
+ const char *buffer;
+ size_t idx;
+ uint32_t line;
+ bool newline;
+ const char *file;
+ size_t len;
+
+} BcLex;
+
+typedef struct BcLexKeyword {
+
+ const char name[9];
+ const unsigned char len;
+ const bool posix;
+
+} BcLexKeyword;
+
+#define KW_TABLE_ENTRY(a, b, c) { .name = a, .len = b, .posix = c }
+
+#define BC_PROGRAM_BUF_SIZE (1024)
+
+typedef struct BcProgram {
+
+ BcVec ip_stack;
+
+ size_t scale;
+
+ BcNum ibase;
+ size_t ibase_t;
+ BcNum obase;
+ size_t obase_t;
+
+ long base_max;
+ long dim_max;
+ long scale_max;
+ long string_max;
+
+ BcVec expr_stack;
+
+ BcVec stack;
+
+ BcVec funcs;
+
+ BcVecO func_map;
+
+ BcVec vars;
+
+ BcVecO var_map;
+
+ BcVec arrays;
+
+ BcVecO array_map;
+
+ BcVec strings;
+
+ BcVec constants;
+
+ const char *file;
+
+ BcNum last;
+
+ BcNum zero;
+ BcNum one;
+
+ char *num_buf;
+ size_t buf_size;
+
+} BcProgram;
+
+#define BC_PROGRAM_CHECK_STACK(p) ((p)->stack.len > 1)
+#define BC_PROGRAM_CHECK_EXPR_STACK(p, l) ((p)->expr_stack.len >= (l))
+
+#define BC_PROGRAM_MAIN_FUNC (0)
+#define BC_PROGRAM_READ_FUNC (1)
+
+#define BC_PROGRAM_SEARCH_VAR (1<<0)
+#define BC_PROGRAM_SEARCH_ARRAY_ONLY (1<<1)
+
+typedef BcStatus (*BcProgramExecFunc)(BcProgram*);
+typedef unsigned long (*BcProgramBuiltInFunc)(BcNum*);
+typedef void (*BcNumInitFunc)(BcNum*);
+
+BcStatus bc_program_func_add(BcProgram *p, char *name, size_t *idx);
+BcStatus bc_program_exec(BcProgram *p);
+
+#define BC_PARSE_TOP_FLAG_PTR(parse) \
+ ((uint8_t*) bc_vec_top(&(parse)->flags))
+
+#define BC_PARSE_TOP_FLAG(parse) \
+ (*(BC_PARSE_TOP_FLAG_PTR(parse)))
+
+#define BC_PARSE_FLAG_FUNC_INNER (0x01)
+
+#define BC_PARSE_FUNC_INNER(parse) \
+ (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_FUNC_INNER)
+
+#define BC_PARSE_FLAG_FUNC (0x02)
+
+#define BC_PARSE_FUNC(parse) \
+ (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_FUNC)
+
+#define BC_PARSE_FLAG_BODY (0x04)
+
+#define BC_PARSE_BODY(parse) \
+ (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_BODY)
+
+#define BC_PARSE_FLAG_LOOP (0x08)
+
+#define BC_PARSE_LOOP(parse) \
+ (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_LOOP)
+
+#define BC_PARSE_FLAG_LOOP_INNER (0x10)
+
+#define BC_PARSE_LOOP_INNER(parse) \
+ (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_LOOP_INNER)
+
+#define BC_PARSE_FLAG_IF (0x20)
+
+#define BC_PARSE_IF(parse) \
+ (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_IF)
+
+#define BC_PARSE_FLAG_ELSE (0x40)
+
+#define BC_PARSE_ELSE(parse) \
+ (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_ELSE)
+
+#define BC_PARSE_FLAG_IF_END (0x80)
+
+#define BC_PARSE_IF_END(parse) \
+ (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_IF_END)
+
+#define BC_PARSE_CAN_EXEC(parse) \
+ (!(BC_PARSE_TOP_FLAG(parse) & (BC_PARSE_FLAG_FUNC_INNER | \
+ BC_PARSE_FLAG_FUNC | \
+ BC_PARSE_FLAG_BODY | \
+ BC_PARSE_FLAG_LOOP | \
+ BC_PARSE_FLAG_LOOP_INNER | \
+ BC_PARSE_FLAG_IF | \
+ BC_PARSE_FLAG_ELSE | \
+ BC_PARSE_FLAG_IF_END)))
+
+// We can calculate the conversion between tokens and exprs
+// by subtracting the position of the first operator in the
+// lex enum and adding the position of the first in the expr
+// enum. Note: This only works for binary operators.
+#define BC_PARSE_TOKEN_TO_EXPR(type) ((type) - BC_LEX_OP_POWER + BC_EXPR_POWER)
+
+typedef struct BcOp {
+
+ uint8_t prec;
+ bool left;
+
+} BcOp;
+
+typedef struct BcParse {
+
+ BcLex lex;
+ BcLexToken token;
+
+ BcVec flags;
+
+ BcVec exit_labels;
+
+ BcVec cond_labels;
+
+ BcVec ops;
+
+ BcProgram *program;
+ size_t func;
+
+ uint32_t num_braces;
+
+ bool auto_part;
+
+} BcParse;
+
+#define BC_PARSE_EXPR_POSIX_REL (1<<0)
+#define BC_PARSE_EXPR_PRINT (1<<1)
+#define BC_PARSE_EXPR_NO_CALL (1<<2)
+#define BC_PARSE_EXPR_NO_READ (1<<3)
+
+BcStatus bc_parse_expr(BcParse *parse, BcVec *code, uint8_t flags);
+
+#define BC_VM_BUF_SIZE (1024)
+
+typedef struct BcVm {
+
+ BcProgram program;
+ BcParse parse;
+
+ int filec;
+ const char** filev;
+
+} BcVm;
+
+const char *bc_version = "0.1";
+
+const char *bc_copyright = "bc copyright (c) 2018 Gavin D. Howard";
+
+const char *bc_warranty_short =
+ "This is free software with ABSOLUTELY NO WARRANTY.";
+
+const char *bc_version_fmt = "bc %s\n%s\n\n%s\n\n";
+
+const char *bc_err_types[] = {
+
+ NULL,
+
+ "bc",
+ "bc",
+
+ "bc",
+
+ "bc",
+
+ "bc",
+ "bc",
+
+ "vector",
+
+ "ordered vector",
+ "ordered vector",
+
+ "Lex",
+ "Lex",
+ "Lex",
+ "Lex",
+
+ "Parse",
+ "Parse",
+ "Parse",
+ "Parse",
+ "Parse",
+ "Parse",
+ "Parse",
+ "Parse",
+ "Parse",
+ "Parse",
+ "Parse",
+ "Parse",
+
+ "Math",
+ "Math",
+ "Math",
+ "Math",
+ "Math",
+ "Math",
+ "Math",
+
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+ "Runtime",
+
+ "POSIX",
+ "POSIX",
+ "POSIX",
+ "POSIX",
+ "POSIX",
+ "POSIX",
+ "POSIX",
+ "POSIX",
+ "POSIX",
+ "POSIX",
+ "POSIX",
+ "POSIX",
+
+};
+
+const char *bc_err_descs[] = {
+
+ NULL,
+
+ "memory allocation error",
+ "I/O error",
+
+ "invalid parameter",
+
+ "invalid option",
+
+ "one or more limits not specified",
+ "invalid limit; this is a bug in bc",
+
+ "index is out of bounds for the vector and error was not caught; "
+ "this is probably a bug in bc",
+
+ "index is out of bounds for the ordered vector and error was not caught; "
+ "this is probably a bug in bc",
+ "item already exists in ordered vector and error was not caught; "
+ "this is probably a bug in bc",
+
+ "invalid token",
+ "string end could not be found",
+ "comment end could not be found",
+ "end of file",
+
+ "invalid token",
+ "invalid expression",
+ "invalid print statement",
+ "invalid function definition",
+ "invalid assignment: must assign to scale, "
+ "ibase, obase, last, a variable, or an array element",
+ "no auto variable found",
+ "limits statement in file not handled correctly; "
+ "this is most likely a bug in bc",
+ "quit statement in file not exited correctly; "
+ "this is most likely a bug in bc",
+ "number of functions does not match the number of entries "
+ "in the function map; this is most likely a bug in bc",
+ "function parameter or auto var has the same name as another",
+ "end of file",
+ "bug in parser",
+
+ "negative number",
+ "non integer number",
+ "overflow",
+ "divide by zero",
+ "negative square root",
+ "invalid number string",
+ "cannot truncate more places than exist after the decimal point",
+
+ "couldn't open file",
+ "mismatched parameters",
+ "undefined function",
+ "undefined variable",
+ "undefined array",
+ "file is not executable",
+ "could not install signal handler",
+ "invalid value for scale; must be an integer in the range [0, BC_SCALE_MAX]",
+ "invalid value for ibase; must be an integer in the range [2, 16]",
+ "invalid value for obase; must be an integer in the range [2, BC_BASE_MAX]",
+ "invalid statement; this is most likely a bug in bc",
+ "invalid expression; this is most likely a bug in bc",
+ "invalid string",
+ "string too long: length must be in the range [0, BC_STRING_MAX]",
+ "invalid name/identifier",
+ "invalid array length; must be an integer in the range [1, BC_DIM_MAX]",
+ "invalid read() expression",
+ "read() call inside of a read() call",
+ "print error",
+ "invalid constant",
+ "invalid lvalue; cannot assign to constants or intermediate values",
+ "cannot return from function; no function to return from",
+ "invalid label; this is probably a bug in bc",
+ "variable is wrong type",
+ "invalid stack; this is probably a bug in bc",
+ "bc was not halted correctly; this is a bug in bc",
+
+ "POSIX only allows one character names; the following is invalid:",
+ "POSIX does not allow '#' script comments",
+ "POSIX does not allow the following keyword:",
+ "POSIX does not allow a period ('.') as a shortcut for the last result",
+ "POSIX requires parentheses around return expressions",
+ "POSIX does not allow boolean operators; the following is invalid:",
+ "POSIX does not allow comparison operators outside if or loops",
+ "POSIX does not allow more than one comparison operator per condition",
+ "POSIX does not allow an empty init expression in a for loop",
+ "POSIX does not allow an empty condition expression in a for loop",
+ "POSIX does not allow an empty update expression in a for loop",
+ "POSIX requires the left brace be on the same line as the function header",
+
+};
+
+const char *bc_lang_func_main = "(main)";
+const char *bc_lang_func_read = "(read)";
+
+const char *bc_lex_token_type_strs[] = {
+ BC_LEX_TOKEN_FOREACH(BC_LEX_GEN_STR)
+};
+
+const BcLexKeyword bc_lex_keywords[20] = {
+ KW_TABLE_ENTRY("auto", 4, true),
+ KW_TABLE_ENTRY("break", 5, true),
+ KW_TABLE_ENTRY("continue", 8, false),
+ KW_TABLE_ENTRY("define", 6, true),
+ KW_TABLE_ENTRY("else", 4, false),
+ KW_TABLE_ENTRY("for", 3, true),
+ KW_TABLE_ENTRY("halt", 4, false),
+ KW_TABLE_ENTRY("ibase", 5, true),
+ KW_TABLE_ENTRY("if", 2, true),
+ KW_TABLE_ENTRY("last", 4, false),
+ KW_TABLE_ENTRY("length", 6, true),
+ KW_TABLE_ENTRY("limits", 6, false),
+ KW_TABLE_ENTRY("obase", 5, true),
+ KW_TABLE_ENTRY("print", 5, false),
+ KW_TABLE_ENTRY("quit", 4, true),
+ KW_TABLE_ENTRY("read", 4, false),
+ KW_TABLE_ENTRY("return", 6, true),
+ KW_TABLE_ENTRY("scale", 5, true),
+ KW_TABLE_ENTRY("sqrt", 4, true),
+ KW_TABLE_ENTRY("while", 5, true),
+};
+
+const char bc_num_hex_digits[] = "0123456789ABCDEF";
+
+// This is an array that corresponds to token types. An entry is
+// true if the token is valid in an expression, false otherwise.
+const bool bc_parse_token_exprs[] = {
+
+ true,
+ true,
+
+ true,
+
+ true,
+ true,
+ true,
+
+ true,
+ true,
+
+ true,
+ true,
+ true,
+ true,
+ true,
+ true,
+ true,
+
+ true,
+ true,
+ true,
+ true,
+ true,
+ true,
+
+ true,
+
+ true,
+ true,
+
+ true,
+
+ false,
+
+ false,
+
+ true,
+ true,
+
+ false,
+ false,
+
+ false,
+ false,
+
+ false,
+ false,
+
+ false,
+ true,
+ true,
+
+ false,
+ false,
+ false,
+ false,
+ false,
+ false,
+ false,
+ true,
+ false,
+ true,
+ true,
+ true,
+ true,
+ false,
+ false,
+ true,
+ false,
+ true,
+ true,
+ false,
+
+ false,
+
+ false,
+};
+
+// This is an array of data for operators that correspond to token types.
+// The last corresponds to BC_PARSE_OP_NEGATE_IDX since it doesn't have
+// its own token type (it is the same token at the binary minus operator).
+const BcOp bc_parse_ops[] = {
+
+ { 0, false },
+ { 0, false },
+
+ { 1, false },
+
+ { 2, false },
+
+ { 3, true },
+ { 3, true },
+ { 3, true },
+
+ { 4, true },
+ { 4, true },
+
+ { 6, true },
+ { 6, true },
+ { 6, true },
+ { 6, true },
+ { 6, true },
+ { 6, true },
+
+ { 7, false },
+
+ { 8, true },
+ { 8, true },
+
+ { 5, false },
+ { 5, false },
+ { 5, false },
+ { 5, false },
+ { 5, false },
+ { 5, false },
+ { 5, false },
+
+};
+
+const uint8_t bc_parse_insts[] = {
+
+ BC_INST_OP_NEGATE,
+
+ BC_INST_OP_POWER,
+
+ BC_INST_OP_MULTIPLY,
+ BC_INST_OP_DIVIDE,
+ BC_INST_OP_MODULUS,
+
+ BC_INST_OP_PLUS,
+ BC_INST_OP_MINUS,
+
+ BC_INST_OP_REL_EQUAL,
+ BC_INST_OP_REL_LESS_EQ,
+ BC_INST_OP_REL_GREATER_EQ,
+ BC_INST_OP_REL_NOT_EQ,
+ BC_INST_OP_REL_LESS,
+ BC_INST_OP_REL_GREATER,
+
+ BC_INST_OP_BOOL_NOT,
+
+ BC_INST_OP_BOOL_NOT,
+ BC_INST_OP_BOOL_AND,
+
+ BC_INST_OP_ASSIGN_POWER,
+ BC_INST_OP_ASSIGN_MULTIPLY,
+ BC_INST_OP_ASSIGN_DIVIDE,
+ BC_INST_OP_ASSIGN_MODULUS,
+ BC_INST_OP_ASSIGN_PLUS,
+ BC_INST_OP_ASSIGN_MINUS,
+ BC_INST_OP_ASSIGN,
+
+};
+
+const char *bc_program_byte_fmt = "%02x";
+
+const BcNumBinaryFunc bc_program_math_ops[] = {
+
+ bc_num_mod,
+ NULL, // &
+ NULL, // '
+ NULL, // (
+ NULL, // )
+ bc_num_mul,
+ bc_num_add,
+ NULL, // ,
+ bc_num_sub,
+ NULL, // .
+ bc_num_div,
+
+};
+
+const char *bc_program_stdin_name = "<stdin>";
+
+const char *bc_program_ready_prompt = "ready for more input\n\n";
+
+const char *bc_program_sigint_msg = "\n\ninterrupt (type \"quit\" to exit)\n\n";
+const char *bc_lib_name = "lib.bc";
+
+const unsigned char bc_lib[] = {
+ 115,99,97,108,101,61,50,48,10,100,101,102,105,110,101,32,101,40,120,41,123,
+ 10,9,97,117,116,111,32,98,44,115,44,110,44,114,44,100,44,105,44,112,44,102,
+ 44,118,10,9,98,61,105,98,97,115,101,10,9,105,98,97,115,101,61,65,10,9,105,102,
+ 40,120,60,48,41,123,10,9,9,110,61,49,10,9,9,120,61,45,120,10,9,125,10,9,115,
+ 61,115,99,97,108,101,10,9,114,61,115,43,55,43,48,46,52,53,42,120,10,9,115,99,
+ 97,108,101,61,115,99,97,108,101,40,120,41,43,49,10,9,119,104,105,108,101,40,
+ 120,62,49,41,123,10,9,9,100,43,61,49,10,9,9,120,47,61,50,10,9,9,115,99,97,108,
+ 101,43,61,49,10,9,125,10,9,115,99,97,108,101,61,114,10,9,114,61,120,43,49,10,
+ 9,112,61,120,10,9,102,61,49,10,9,102,111,114,40,105,61,50,59,49,59,43,43,105,
+ 41,123,10,9,9,112,42,61,120,59,10,9,9,102,42,61,105,10,9,9,118,61,112,47,102,
+ 10,9,9,105,102,40,101,61,61,48,41,98,114,101,97,107,10,9,9,114,43,61,118,10,
+ 9,125,10,9,119,104,105,108,101,40,102,45,45,41,114,42,61,114,10,9,115,99,97,
+ 108,101,61,115,10,9,105,98,97,115,101,61,98,10,9,105,102,40,109,41,114,101,
+ 116,117,114,110,40,49,47,114,41,10,9,114,101,116,117,114,110,40,114,47,49,41,
+ 10,125,10,100,101,102,105,110,101,32,108,40,120,41,123,10,9,97,117,116,111,
+ 32,98,44,115,44,114,44,112,44,97,44,113,44,105,44,118,10,9,98,61,105,98,97,
+ 115,101,10,9,105,98,97,115,101,61,65,10,9,105,102,40,120,60,61,48,41,123,10,
+ 9,9,114,61,40,49,45,49,48,94,115,99,97,108,101,41,47,49,10,9,9,105,98,97,115,
+ 101,61,98,10,9,9,114,101,116,117,114,110,40,114,41,10,9,125,10,9,115,61,115,
+ 99,97,108,101,10,9,115,99,97,108,101,43,61,55,10,9,112,61,50,10,9,119,104,105,
+ 108,101,40,120,62,61,50,41,123,10,9,9,112,42,61,50,10,9,9,120,61,115,113,114,
+ 116,40,120,41,10,9,125,10,9,119,104,105,108,101,40,120,60,61,48,46,53,41,123,
+ 10,9,9,112,42,61,50,10,9,9,120,61,115,113,114,116,40,120,41,10,9,125,10,9,114,
+ 61,97,61,40,120,45,49,41,47,40,120,43,49,41,10,9,113,61,97,42,97,10,9,102,111,
+ 114,40,105,61,51,59,49,59,105,43,61,50,41,123,10,9,9,110,42,61,109,10,9,9,118,
+ 61,110,47,105,10,9,9,105,102,40,101,61,61,48,41,98,114,101,97,107,10,9,9,114,
+ 43,61,118,10,9,125,10,9,114,42,61,112,10,9,115,99,97,108,101,61,115,10,9,105,
+ 98,97,115,101,61,98,10,9,114,101,116,117,114,110,40,114,47,49,41,10,125,10,
+ 100,101,102,105,110,101,32,115,40,120,41,123,10,9,97,117,116,111,32,98,44,115,
+ 44,114,44,110,44,97,44,113,44,105,10,9,98,61,105,98,97,115,101,10,9,105,98,
+ 97,115,101,61,65,10,9,115,61,115,99,97,108,101,10,9,115,99,97,108,101,61,49,
+ 46,51,42,115,43,50,10,9,97,61,97,40,49,41,10,9,105,102,40,120,60,48,41,123,
+ 10,9,9,110,61,49,10,9,9,120,61,45,120,10,9,125,10,9,115,99,97,108,101,61,48,
+ 10,9,113,61,40,120,47,97,43,50,41,47,52,10,9,120,45,61,52,42,113,42,97,10,9,
+ 105,102,40,113,37,50,41,120,61,45,120,10,9,115,99,97,108,101,61,115,43,50,10,
+ 9,114,61,97,61,120,10,9,113,61,45,120,42,120,10,9,102,111,114,40,105,61,51,
+ 59,49,59,105,43,61,50,41,123,10,9,9,97,42,61,113,47,40,105,42,40,105,45,49,
+ 41,41,10,9,9,105,102,40,97,61,61,48,41,98,114,101,97,107,10,9,9,114,43,61,97,
+ 10,9,125,10,9,115,99,97,108,101,61,115,10,9,105,98,97,115,101,61,98,10,9,105,
+ 102,40,110,41,114,101,116,117,114,110,40,45,114,47,49,41,10,9,114,101,116,117,
+ 114,110,40,114,47,49,41,10,125,10,100,101,102,105,110,101,32,99,40,120,41,123,
+ 10,9,97,117,116,111,32,98,44,115,10,9,98,61,105,98,97,115,101,10,9,105,98,97,
+ 115,101,61,65,10,9,115,61,115,99,97,108,101,10,9,115,99,97,108,101,43,61,49,
+ 10,9,120,61,115,40,50,42,97,40,49,41,43,120,41,10,9,115,99,97,108,101,61,115,
+ 10,9,105,98,97,115,101,61,98,10,9,114,101,116,117,114,110,40,120,47,49,41,10,
+ 125,10,100,101,102,105,110,101,32,97,40,120,41,123,10,9,97,117,116,111,32,98,
+ 44,115,44,114,44,110,44,97,44,109,44,116,44,102,44,105,44,117,10,9,98,61,105,
+ 98,97,115,101,10,9,105,98,97,115,101,61,65,10,9,110,61,49,10,9,105,102,40,120,
+ 60,48,41,123,10,9,9,110,61,45,49,10,9,9,120,61,45,120,10,9,125,10,9,105,102,
+ 40,120,61,61,49,41,123,10,9,9,105,102,40,115,99,97,108,101,60,61,54,52,41,123,
+ 10,9,9,9,114,101,116,117,114,110,40,46,55,56,53,51,57,56,49,54,51,51,57,55,
+ 52,52,56,51,48,57,54,49,53,54,54,48,56,52,53,56,49,57,56,55,53,55,50,49,48,
+ 52,57,50,57,50,51,52,57,56,52,51,55,55,54,52,53,53,50,52,51,55,51,54,49,52,
+ 56,48,47,110,41,10,9,9,125,10,9,125,10,9,105,102,40,120,61,61,46,50,54,55,41,
+ 123,10,9,9,105,102,40,115,99,97,108,101,60,61,54,52,41,123,10,9,9,9,114,101,
+ 116,117,114,110,40,46,50,54,48,57,49,51,53,54,57,50,51,50,57,52,48,53,55,57,
+ 53,57,54,55,56,53,50,54,55,55,55,55,57,56,54,53,54,51,57,55,55,52,55,52,48,
+ 50,51,57,56,56,50,52,52,53,56,50,50,51,50,57,56,56,50,57,49,55,47,110,41,10,
+ 9,9,125,10,9,125,10,9,115,61,115,99,97,108,101,10,9,105,102,40,120,62,46,50,
+ 54,55,41,123,10,9,9,115,99,97,108,101,43,61,53,10,9,9,97,61,97,40,46,50,54,
+ 55,41,10,9,125,10,9,115,99,97,108,101,61,115,43,51,10,9,119,104,105,108,101,
+ 40,120,62,46,50,54,55,41,123,10,9,9,109,43,61,49,10,9,9,120,61,40,120,45,46,
+ 50,54,55,41,47,40,49,43,46,50,54,55,42,120,41,10,9,125,10,9,114,61,117,61,120,
+ 10,9,102,61,45,120,42,120,10,9,102,111,114,40,105,61,51,59,49,59,105,43,61,
+ 50,41,123,10,9,9,117,42,61,102,10,9,9,116,61,117,47,105,10,9,9,105,102,40,116,
+ 61,61,48,41,98,114,101,97,107,10,9,9,114,43,61,116,10,9,125,10,9,115,99,97,
+ 108,101,61,115,10,9,105,98,97,115,101,61,98,10,9,114,101,116,117,114,110,40,
+ 40,109,42,97,43,114,41,47,110,41,10,125,10,100,101,102,105,110,101,32,106,40,
+ 110,44,120,41,123,10,9,97,117,116,111,32,98,44,115,44,111,44,97,44,105,44,118,
+ 44,102,10,9,98,61,105,98,97,115,101,10,9,105,98,97,115,101,61,65,10,9,115,61,
+ 115,99,97,108,101,10,9,115,99,97,108,101,61,48,10,9,110,47,61,49,10,9,105,102,
+ 40,110,60,48,41,123,10,9,9,110,61,45,110,10,9,9,105,102,40,110,37,50,61,61,
+ 49,41,111,61,49,10,9,125,10,9,97,61,49,10,9,102,111,114,40,105,61,50,59,105,
+ 60,61,110,59,43,43,105,41,102,42,61,105,10,9,115,99,97,108,101,61,49,46,53,
+ 42,115,10,9,97,61,40,120,94,110,41,47,40,50,94,110,42,97,41,10,9,114,61,118,
+ 61,49,10,9,102,61,45,120,42,120,47,52,10,9,115,99,97,108,101,43,61,108,101,
+ 110,103,116,104,40,97,41,45,115,99,97,108,101,40,97,41,10,9,102,111,114,40,
+ 105,61,49,59,49,59,43,43,105,41,123,10,9,9,118,61,118,42,115,47,105,47,40,110,
+ 43,105,41,10,9,9,105,102,40,118,61,61,48,41,98,114,101,97,107,10,9,9,114,43,
+ 61,118,10,9,125,10,9,115,99,97,108,101,61,115,10,9,105,98,97,115,101,61,98,
+ 10,9,105,102,40,111,41,114,101,116,117,114,110,40,45,97,42,114,47,49,41,10,
+ 9,114,101,116,117,114,110,40,97,42,114,47,49,41,10,125,10,0
+};
+
+BcStatus bc_vec_double(BcVec *vec) {
+
+ uint8_t *ptr;
+
+ ptr = realloc(vec->array, vec->size * (vec->cap * 2));
+
+ if (!ptr) return BC_STATUS_MALLOC_FAIL;
+
+ vec->array = ptr;
+ vec->cap *= 2;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_vec_init(BcVec *vec, size_t esize, BcFreeFunc dtor) {
+
+ if (vec == NULL || esize == 0) return BC_STATUS_INVALID_PARAM;
+
+ vec->size = esize;
+ vec->cap = BC_VEC_INITIAL_CAP;
+ vec->len = 0;
+ vec->dtor = dtor;
+
+ vec->array = malloc(esize * BC_VEC_INITIAL_CAP);
+
+ if (!vec->array) return BC_STATUS_MALLOC_FAIL;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_vec_expand(BcVec *vec, size_t request) {
+
+ uint8_t *ptr;
+
+ if (!vec) return BC_STATUS_INVALID_PARAM;
+
+ if (vec->cap >= request) return BC_STATUS_SUCCESS;
+
+ ptr = realloc(vec->array, vec->size * request);
+
+ if (!ptr) return BC_STATUS_MALLOC_FAIL;
+
+ vec->array = ptr;
+ vec->cap = request;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_vec_push(BcVec *vec, void *data) {
+
+ BcStatus status;
+ size_t size;
+
+ if (vec == NULL || data == NULL) return BC_STATUS_INVALID_PARAM;
+
+ if (vec->len == vec->cap) {
+
+ status = bc_vec_double(vec);
+
+ if (status) return status;
+ }
+
+ size = vec->size;
+ memmove(vec->array + (size * vec->len), data, size);
+
+ ++vec->len;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_vec_pushByte(BcVec *vec, uint8_t data) {
+
+ BcStatus status;
+
+ if (vec == NULL || vec->size != sizeof(uint8_t))
+ return BC_STATUS_INVALID_PARAM;
+
+ if (vec->len == vec->cap) {
+
+ status = bc_vec_double(vec);
+
+ if (status) return status;
+ }
+
+ vec->array[vec->len] = data;
+
+ ++vec->len;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_vec_pushAt(BcVec *vec, void *data, size_t idx) {
+
+ BcStatus status;
+ uint8_t *ptr;
+ size_t size;
+
+ if (vec == NULL || data == NULL || idx > vec->len)
+ return BC_STATUS_INVALID_PARAM;
+
+ if (idx == vec->len) return bc_vec_push(vec, data);
+
+ if (vec->len == vec->cap) {
+
+ status = bc_vec_double(vec);
+
+ if (status) return status;
+ }
+
+ size = vec->size;
+ ptr = vec->array + size * idx;
+
+ memmove(ptr + size, ptr, size * (vec->len - idx));
+ memmove(ptr, data, size);
+
+ ++vec->len;
+
+ return BC_STATUS_SUCCESS;
+}
+
+void* bc_vec_top(const BcVec *vec) {
+
+ if (vec == NULL || vec->len == 0) return NULL;
+
+ return vec->array + vec->size * (vec->len - 1);
+}
+
+void* bc_vec_item(const BcVec *vec, size_t idx) {
+
+ if (vec == NULL || vec->len == 0 || idx >= vec->len) return NULL;
+
+ return vec->array + vec->size * idx;
+}
+
+void* bc_vec_item_rev(const BcVec *vec, size_t idx) {
+
+ if (vec == NULL || vec->len == 0 || idx >= vec->len) return NULL;
+
+ return vec->array + vec->size * (vec->len - idx - 1);
+}
+
+BcStatus bc_vec_pop(BcVec *vec) {
+
+ if (vec == NULL) return BC_STATUS_INVALID_PARAM;
+
+ if (!vec->len) return BC_STATUS_VEC_OUT_OF_BOUNDS;
+
+ --vec->len;
+
+ if (vec->dtor) vec->dtor(vec->array + (vec->size * vec->len));
+
+ return BC_STATUS_SUCCESS;
+}
+
+void bc_vec_free(void *vec) {
+
+ BcVec *s;
+ size_t len;
+ size_t esize;
+ BcFreeFunc sfree;
+ uint8_t *array;
+
+ s = (BcVec*) vec;
+
+ if (s == NULL) return;
+
+ sfree = s->dtor;
+
+ if (sfree) {
+
+ len = s->len;
+ array = s->array;
+ esize = s->size;
+
+ for (size_t i = 0; i < len; ++i) sfree(array + (i * esize));
+ }
+
+ free(s->array);
+
+ s->size = 0;
+ s->array = NULL;
+ s->len = 0;
+ s->cap = 0;
+}
+
+size_t bc_veco_find(const BcVecO* vec, void *data) {
+
+ BcVecCmpFunc cmp;
+ size_t low, high;
+
+ cmp = vec->cmp;
+
+ low = 0;
+ high = vec->vec.len;
+
+ while (low < high) {
+
+ size_t mid;
+ int result;
+ uint8_t *ptr;
+
+ mid = (low + high) / 2;
+
+ ptr = bc_vec_item(&vec->vec, mid);
+
+ result = cmp(data, ptr);
+
+ if (!result) return mid;
+
+ if (result < 0) high = mid;
+ else low = mid + 1;
+ }
+
+ return low;
+}
+
+BcStatus bc_veco_init(BcVecO* vec, size_t esize,
+ BcFreeFunc dtor, BcVecCmpFunc cmp)
+{
+ if (!vec || esize == 0 || !cmp) return BC_STATUS_INVALID_PARAM;
+
+ vec->cmp = cmp;
+
+ return bc_vec_init(&vec->vec, esize, dtor);
+}
+
+BcStatus bc_veco_insert(BcVecO* vec, void *data, size_t *idx) {
+
+ BcStatus status;
+
+ if (!vec || !data) return BC_STATUS_INVALID_PARAM;
+
+ *idx = bc_veco_find(vec, data);
+
+ if (*idx > vec->vec.len) return BC_STATUS_VECO_OUT_OF_BOUNDS;
+
+ if (*idx != vec->vec.len && !vec->cmp(data, bc_vec_item(&vec->vec, *idx)))
+ return BC_STATUS_VECO_ITEM_EXISTS;
+
+ if (*idx >= vec->vec.len) {
+ *idx = vec->vec.len;
+ status = bc_vec_push(&vec->vec, data);
+ }
+ else status = bc_vec_pushAt(&vec->vec, data, *idx);
+
+ return status;
+}
+
+size_t bc_veco_index(const BcVecO* vec, void *data) {
+
+ size_t idx;
+
+ if (!vec || !data) return BC_STATUS_INVALID_PARAM;
+
+ idx = bc_veco_find(vec, data);
+
+ if (idx >= vec->vec.len || vec->cmp(data, bc_vec_item(&vec->vec, idx)))
+ return BC_INVALID_IDX;
+
+ return idx;
+}
+
+void* bc_veco_item(const BcVecO* vec, size_t idx) {
+ return bc_vec_item(&vec->vec, idx);
+}
+
+void bc_veco_free(BcVecO* vec) {
+ bc_vec_free(&vec->vec);
+}
+
+int bc_num_compareDigits(BcNum *a, BcNum *b, size_t *digits) {
+
+ size_t i;
+ size_t min;
+ BcDigit *max_num;
+ BcDigit *min_num;
+ bool a_max;
+ bool neg;
+ size_t a_int;
+ size_t b_int;
+ BcDigit *ptr_a;
+ BcDigit *ptr_b;
+ size_t diff;
+ int cmp;
+ BcDigit c;
+
+ *digits = 0;
+
+ if (!a) {
+
+ if (!b) return 0;
+ else return b->neg ? 1 : -1;
+ }
+ else if (!b) return a->neg ? -1 : 1;
+
+ neg = false;
+
+ if (a->neg) {
+
+ if (b->neg) neg = true;
+ else return -1;
+ }
+ else if (b->neg) return 1;
+
+ if (BC_NUM_ZERO(a)) {
+ cmp = b->neg ? 1 : -1;
+ return BC_NUM_ZERO(b) ? 0 : cmp;
+ }
+ else if (BC_NUM_ZERO(b)) return a->neg ? -1 : 1;
+
+ a_int = a->len - a->rdx;
+ b_int = b->len - b->rdx;
+
+ if (a_int > b_int) return 1;
+ else if (b_int > a_int) return -1;
+
+ ptr_a = a->num + a->rdx;
+ ptr_b = b->num + b->rdx;
+
+ for (i = a_int - 1; i < a_int; --i, ++(*digits)) {
+ c = ptr_a[i] - ptr_b[i];
+ if (c) return neg ? -c : c;
+ }
+
+ a_max = a->rdx > b->rdx;
+
+ if (a_max) {
+
+ min = b->rdx;
+
+ diff = a->rdx - b->rdx;
+
+ max_num = a->num + diff;
+ min_num = b->num;
+
+ for (i = min - 1; i < min; --i, ++(*digits)) {
+ c = max_num[i] - min_num[i];
+ if (c) return neg ? -c : c;
+ }
+
+ max_num -= diff;
+
+ for (i = diff - 1; i < diff; --i) {
+ if (max_num[i]) return neg ? -1 : 1;
+ }
+ }
+ else {
+
+ min = a->rdx;
+
+ diff = b->rdx - a->rdx;
+
+ max_num = b->num + diff;
+ min_num = a->num;
+
+ for (i = min - 1; i < min; --i, ++(*digits)) {
+ c = max_num[i] - min_num[i];
+ if (c) return neg ? c : -c;
+ }
+
+ max_num -= diff;
+
+ for (i = diff - 1; i < diff; --i) {
+ if (max_num[i]) return neg ? 1 : -1;
+ }
+ }
+
+ return 0;
+}
+
+int bc_num_compareArrays(BcDigit *array1, BcDigit *array2, size_t len) {
+
+ size_t i;
+ BcDigit c;
+
+ if (array1[len]) return 1;
+
+ for (i = len - 1; i < len; --i) {
+ c = array1[i] - array2[i];
+ if (c) return c;
+ }
+
+ return 0;
+}
+
+BcStatus bc_num_trunc(BcNum *n, size_t places) {
+
+ BcDigit *ptr;
+
+ if (places > n->rdx) return BC_STATUS_MATH_INVALID_TRUNCATE;
+
+ if (places == 0) return BC_STATUS_SUCCESS;
+
+ ptr = n->num + places;
+
+ n->len -= places;
+ n->rdx -= places;
+
+ memmove(n->num, ptr, n->len * sizeof(BcDigit));
+
+ memset(n->num + n->len, 0, sizeof(BcDigit) * (n->cap - n->len));
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_extend(BcNum *n, size_t places) {
+
+ BcStatus status;
+ BcDigit *ptr;
+ size_t len;
+
+ if (places == 0) return BC_STATUS_SUCCESS;
+
+ len = n->len + places;
+
+ if (n->cap < len) {
+
+ status = bc_num_expand(n, len);
+
+ if (status) return status;
+ }
+
+ ptr = n->num + places;
+
+ memmove(ptr, n->num, sizeof(BcDigit) * n->len);
+
+ memset(n->num, 0, sizeof(BcDigit) * places);
+
+ n->len += places;
+ n->rdx += places;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_alg_a(BcNum *a, BcNum *b, BcNum *c, size_t scale) {
+
+ BcDigit *ptr;
+ BcDigit *ptr_a;
+ BcDigit *ptr_b;
+ BcDigit *ptr_c;
+ size_t i;
+ size_t max;
+ size_t min;
+ size_t diff;
+ size_t a_whole;
+ size_t b_whole;
+ BcDigit carry;
+
+ (void) scale;
+
+ c->neg = a->neg;
+
+ memset(c->num, 0, c->cap * sizeof(BcDigit));
+
+ c->rdx = BC_MAX(a->rdx, b->rdx);
+
+ min = BC_MIN(a->rdx, b->rdx);
+
+ c->len = 0;
+
+ if (a->rdx > b->rdx) {
+
+ diff = a->rdx - b->rdx;
+
+ ptr = a->num;
+ ptr_a = a->num + diff;
+ ptr_b = b->num;
+ }
+ else {
+
+ diff = b->rdx - a->rdx;
+
+ ptr = b->num;
+ ptr_a = a->num;
+ ptr_b = b->num + diff;
+ }
+
+ ptr_c = c->num;
+
+ for (i = 0; i < diff; ++i) {
+ ptr_c[i] = ptr[i];
+ ++c->len;
+ }
+
+ ptr_c += diff;
+
+ carry = 0;
+
+ for (i = 0; i < min; ++i) {
+
+ ptr_c[i] = ptr_a[i] + ptr_b[i] + carry;
+ ++c->len;
+
+ if (ptr_c[i] >= 10) {
+ carry = ptr_c[i] / 10;
+ ptr_c[i] %= 10;
+ }
+ else carry = 0;
+ }
+
+ c->rdx = c->len;
+
+ a_whole = a->len - a->rdx;
+ b_whole = b->len - b->rdx;
+
+ min = BC_MIN(a_whole, b_whole);
+
+ ptr_a = a->num + a->rdx;
+ ptr_b = b->num + b->rdx;
+ ptr_c = c->num + c->rdx;
+
+ for (i = 0; i < min; ++i) {
+
+ ptr_c[i] = ptr_a[i] + ptr_b[i] + carry;
+ ++c->len;
+
+ if (ptr_c[i] >= 10) {
+ carry = ptr_c[i] / 10;
+ ptr_c[i] %= 10;
+ }
+ else carry = 0;
+ }
+
+ if (a_whole > b_whole) {
+ max = a_whole;
+ ptr = ptr_a;
+ }
+ else {
+ max = b_whole;
+ ptr = ptr_b;
+ }
+
+ for (; i < max; ++i) {
+
+ ptr_c[i] += ptr[i] + carry;
+ ++c->len;
+
+ if (ptr_c[i] >= 10) {
+ carry = ptr_c[i] / 10;
+ ptr_c[i] %= 10;
+ }
+ else carry = 0;
+ }
+
+ if (carry) {
+ ++c->len;
+ ptr_c[i] = carry;
+ }
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_alg_s(BcNum *a, BcNum *b, BcNum *c, size_t sub) {
+
+ BcStatus status;
+ int cmp;
+ BcNum *minuend;
+ BcNum *subtrahend;
+ size_t i, j, start;
+ bool aneg, bneg, neg;
+
+ // Because this function doesn't need to use scale (per the bc spec),
+ // I am hijacking it to tell this function whether it is doing an add
+ // or a subtract.
+
+ if (BC_NUM_ZERO(a)) {
+ status = bc_num_copy(c, b);
+ c->neg = !b->neg;
+ return status;
+ }
+ else if (BC_NUM_ZERO(b)) return bc_num_copy(c, a);
+
+ aneg = a->neg;
+ bneg = b->neg;
+
+ a->neg = b->neg = false;
+
+ cmp = bc_num_compare(a, b);
+
+ a->neg = aneg;
+ b->neg = bneg;
+
+ if (!cmp) {
+ bc_num_zero(c);
+ return BC_STATUS_SUCCESS;
+ }
+ else if (cmp > 0) {
+ neg = sub ? a->neg : !a->neg;
+ minuend = a;
+ subtrahend = b;
+ }
+ else {
+ neg = sub ? !b->neg : b->neg;
+ minuend = b;
+ subtrahend = a;
+ }
+
+ status = bc_num_copy(c, minuend);
+
+ if (status) return status;
+
+ c->neg = neg;
+
+ if (c->rdx < subtrahend->rdx) {
+ status = bc_num_extend(c, subtrahend->rdx - c->rdx);
+ if (status) return status;
+ start = 0;
+ }
+ else start = c->rdx - subtrahend->rdx;
+
+ for (i = 0; i < subtrahend->len; ++i) {
+
+ c->num[i + start] -= subtrahend->num[i];
+
+ for (j = 0; c->num[i + j + start] < 0;) {
+
+ c->num[i + j + start] += 10;
+ ++j;
+
+ if (j >= c->len - start) return BC_STATUS_MATH_OVERFLOW;
+
+ c->num[i + j + start] -= 1;
+ }
+ }
+
+ // Remove leading zeros.
+ while (c->len > c->rdx && !c->num[c->len - 1]) --c->len;
+
+ return status;
+}
+
+BcStatus bc_num_alg_m(BcNum *a, BcNum *b, BcNum *c, size_t scale) {
+
+ BcStatus status;
+ BcDigit carry;
+ size_t i;
+ size_t j;
+ size_t len;
+
+ if (BC_NUM_ZERO(a) || BC_NUM_ZERO(b)) {
+ bc_num_zero(c);
+ return BC_STATUS_SUCCESS;
+ }
+ else if (BC_NUM_ONE(a)) {
+ status = bc_num_copy(c, b);
+ if (a->neg) c->neg = !c->neg;
+ return status;
+ }
+ else if (BC_NUM_ONE(b)) {
+ status = bc_num_copy(c, a);
+ if (b->neg) c->neg = !c->neg;
+ return status;
+ }
+
+ scale = BC_MAX(scale, a->rdx);
+ scale = BC_MAX(scale, b->rdx);
+ c->rdx = a->rdx + b->rdx;
+
+ memset(c->num, 0, sizeof(BcDigit) * c->cap);
+ c->len = 0;
+
+ carry = 0;
+ len = 0;
+
+ for (i = 0; i < b->len; ++i) {
+
+ for (j = 0; j < a->len; ++j) {
+
+ c->num[i + j] += a->num[j] * b->num[i] + carry;
+
+ carry = c->num[i + j] / 10;
+ c->num[i + j] %= 10;
+ }
+
+ if (carry) {
+ c->num[i + j] += carry;
+ carry = 0;
+ len = BC_MAX(len, i + j + 1);
+ }
+ else len = BC_MAX(len, i + j);
+ }
+
+ c->len = BC_MAX(len, c->rdx);
+
+ c->neg = !a->neg != !b->neg;
+
+ if (scale < c->rdx) status = bc_num_trunc(c, c->rdx - scale);
+ else status = BC_STATUS_SUCCESS;
+
+ // Remove leading zeros.
+ while (c->len > c->rdx && !c->num[c->len - 1]) --c->len;
+
+ return status;
+}
+
+BcStatus bc_num_alg_d(BcNum *a, BcNum *b, BcNum *c, size_t scale) {
+
+ BcStatus status;
+ BcDigit *ptr;
+ BcDigit *bptr;
+ size_t len;
+ size_t end;
+ size_t i;
+ BcNum copy;
+
+ if (BC_NUM_ZERO(b)) return BC_STATUS_MATH_DIVIDE_BY_ZERO;
+ else if (BC_NUM_ZERO(a)) {
+ bc_num_zero(c);
+ return BC_STATUS_SUCCESS;
+ }
+ else if (BC_NUM_ONE(b)) {
+ status = bc_num_copy(c, a);
+ if (b->neg) c->neg = !c->neg;
+ status = bc_num_extend(c, scale);
+ return status;
+ }
+
+ status = bc_num_init(&copy, a->len + b->rdx + scale + 1);
+
+ if (status) return status;
+
+ status = bc_num_copy(&copy, a);
+
+ if (status) goto err;
+
+ len = b->len;
+
+ if (len > copy.len) {
+
+ status = bc_num_expand(&copy, len + 2);
+
+ if (status) goto err;
+
+ status = bc_num_extend(&copy, len - copy.len);
+
+ if (status) goto err;
+ }
+
+ if (b->rdx > copy.rdx) {
+ status = bc_num_extend(&copy, b->rdx - copy.rdx);
+ if (status) goto err;
+ }
+
+ copy.rdx -= b->rdx;
+
+ if (scale > copy.rdx) {
+ status = bc_num_extend(&copy, scale - copy.rdx);
+ if (status) goto err;
+ }
+
+ if (b->rdx == b->len) {
+
+ bool zero;
+
+ zero = true;
+
+ for (i = 0; zero && i < len; ++i) zero = b->num[len - i - 1] == 0;
+
+ if (i == len) return BC_STATUS_MATH_DIVIDE_BY_ZERO;
+
+ len -= i - 1;
+ }
+
+ if (copy.cap == copy.len) {
+ status = bc_num_expand(&copy, copy.len + 1);
+ if (status) goto err;
+ }
+
+ // We want an extra zero in front to make things simpler.
+ copy.num[copy.len] = 0;
+ ++copy.len;
+
+ end = copy.len - len;
+
+ status = bc_num_expand(c, copy.len);
+
+ if (status) goto err;
+
+ bc_num_zero(c);
+ c->rdx = copy.rdx;
+ c->len = copy.len;
+
+ bptr = b->num;
+
+ for (i = end - 1; i < end; --i) {
+
+ size_t j;
+ size_t k;
+ BcDigit quotient;
+
+ ptr = copy.num + i;
+
+ quotient = 0;
+
+ while (bc_num_compareArrays(ptr, bptr, len) >= 0) {
+
+ for (j = 0; j < len; ++j) {
+
+ ptr[j] -= bptr[j];
+
+ k = j;
+
+ while (ptr[k] < 0) {
+
+ ptr[k] += 10;
+ ++k;
+
+ if (k > len) return BC_STATUS_MATH_OVERFLOW;
+
+ ptr[k] -= 1;
+ }
+ }
+
+ ++quotient;
+ }
+
+ c->num[i] = quotient;
+ }
+
+ c->neg = !a->neg != !b->neg;
+
+ // Remove leading zeros.
+ while (c->len > c->rdx && !c->num[c->len - 1]) --c->len;
+
+ if (c->rdx > scale) status = bc_num_trunc(c, c->rdx - scale);
+
+err:
+
+ bc_num_free(&copy);
+
+ return status;
+}
+
+BcStatus bc_num_alg_mod(BcNum *a, BcNum *b, BcNum *c, size_t scale) {
+
+ BcStatus status;
+ BcNum c1;
+ BcNum c2;
+ size_t len;
+
+ len = a->len + b->len + scale;
+
+ status = bc_num_init(&c1, len);
+
+ if (status) return status;
+
+ status = bc_num_init(&c2, len);
+
+ if (status) goto c2_err;
+
+ status = bc_num_div(a, b, &c1, scale);
+
+ if (status) goto err;
+
+ c->rdx = BC_MAX(scale + b->rdx, a->rdx);
+
+ status = bc_num_mul(&c1, b, &c2, scale);
+
+ if (status) goto err;
+
+ status = bc_num_sub(a, &c2, c, scale);
+
+err:
+
+ bc_num_free(&c2);
+
+c2_err:
+
+ bc_num_free(&c1);
+
+ return status;
+}
+
+BcStatus bc_num_alg_p(BcNum *a, BcNum *b, BcNum *c, size_t scale) {
+
+ BcStatus status;
+ BcNum copy;
+ BcNum one;
+ long pow;
+ unsigned long upow;
+ size_t i;
+ size_t powrdx;
+ size_t resrdx;
+ bool neg;
+ bool zero;
+
+ if (b->rdx) return BC_STATUS_MATH_NON_INTEGER;
+
+ status = bc_num_long(b, &pow);
+
+ if (status) return status;
+
+ if (pow == 0) {
+ bc_num_one(c);
+ return BC_STATUS_SUCCESS;
+ }
+ else if (BC_NUM_ZERO(a)) {
+ bc_num_zero(c);
+ return BC_STATUS_SUCCESS;
+ }
+ else if (pow == 1) {
+ return bc_num_copy(c, a);
+ }
+ else if (pow == -1) {
+
+ status = bc_num_init(&one, BC_NUM_DEF_SIZE);
+
+ if (status) return status;
+
+ bc_num_one(&one);
+
+ status = bc_num_div(&one, a, c, scale);
+
+ bc_num_free(&one);
+
+ return status;
+ }
+ else if (pow < 0) {
+ neg = true;
+ upow = -pow;
+ }
+ else {
+ neg = false;
+ upow = pow;
+ scale = BC_MIN(a->rdx * upow, BC_MAX(scale, a->rdx));
+ }
+
+ status = bc_num_init(&copy, a->len);
+
+ if (status) return status;
+
+ status = bc_num_copy(&copy, a);
+
+ if (status) goto err;
+
+ powrdx = a->rdx;
+
+ while (!(upow & 1)) {
+
+ powrdx <<= 1;
+
+ status = bc_num_mul(&copy, &copy, &copy, powrdx);
+
+ if (status) goto err;
+
+ upow >>= 1;
+ }
+
+ status = bc_num_copy(c, &copy);
+
+ if (status) goto err;
+
+ resrdx = powrdx;
+ upow >>= 1;
+
+ while (upow != 0) {
+
+ powrdx <<= 1;
+
+ status = bc_num_mul(&copy, &copy, &copy, powrdx);
+
+ if (status) goto err;
+
+ if (upow & 1) {
+ resrdx += powrdx;
+ bc_num_mul(c, &copy, c, resrdx);
+ }
+
+ upow >>= 1;
+ }
+
+ if (neg) {
+
+ status = bc_num_init(&one, BC_NUM_DEF_SIZE);
+
+ if (status) goto err;
+
+ bc_num_one(&one);
+
+ status = bc_num_div(&one, c, c, scale);
+
+ bc_num_free(&one);
+
+ if (status) goto err;
+ }
+
+ if (c->rdx > scale) {
+ status = bc_num_trunc(c, c->rdx - scale);
+ if (status) goto err;
+ }
+
+ for (zero = true, i = 0; zero && i < c->len; ++i) zero = c->num[i] == 0;
+
+ if (zero) bc_num_zero(c);
+
+err:
+
+ bc_num_free(&copy);
+
+ return status;
+}
+
+BcStatus bc_num_sqrt_newton(BcNum *a, BcNum *b, size_t scale) {
+
+ BcStatus status;
+ BcNum num1;
+ BcNum num2;
+ BcNum two;
+ BcNum *x0;
+ BcNum *x1;
+ BcNum *temp;
+ size_t pow;
+ BcNum f;
+ BcNum fprime;
+ size_t len;
+ size_t digits;
+ size_t resrdx;
+ int cmp;
+
+ if (BC_NUM_ZERO(a)) {
+ bc_num_zero(b);
+ return BC_STATUS_SUCCESS;
+ }
+ else if (BC_NUM_POS_ONE(a)) {
+ bc_num_one(b);
+ return bc_num_extend(b, scale);
+ }
+ else if (a->neg) return BC_STATUS_MATH_NEG_SQRT;
+
+ memset(b->num, 0, b->cap * sizeof(BcDigit));
+
+ scale = BC_MAX(scale, a->rdx) + 1;
+
+ len = a->len;
+
+ status = bc_num_init(&num1, len);
+
+ if (status) return status;
+
+ status = bc_num_init(&num2, num1.len);
+
+ if (status) goto num2_err;
+
+ status = bc_num_init(&two, BC_NUM_DEF_SIZE);
+
+ if (status) goto two_err;
+
+ bc_num_one(&two);
+ two.num[0] = 2;
+
+ len += scale;
+
+ status = bc_num_init(&f, len);
+
+ if (status) goto f_err;
+
+ status = bc_num_init(&fprime, len + scale);
+
+ if (status) goto fprime_err;
+
+ x0 = &num1;
+ x1 = &num2;
+
+ bc_num_one(x0);
+
+ pow = a->len - a->rdx;
+
+ if (pow) {
+
+ if (pow & 1) {
+ x0->num[0] = 2;
+ pow -= 1;
+ }
+ else {
+ x0->num[0] = 6;
+ pow -= 2;
+ }
+
+ status = bc_num_extend(x0, pow);
+
+ if (status) goto err;
+ }
+
+ cmp = 1;
+ x0->rdx = 0;
+ digits = 0;
+ resrdx = scale + 1;
+ len = (x0->len - x0->rdx) + resrdx;
+
+ while (cmp && digits <= len) {
+
+ status = bc_num_mul(x0, x0, &f, resrdx);
+
+ if (status) goto err;
+
+ status = bc_num_sub(&f, a, &f, resrdx);
+
+ if (status) goto err;
+
+ status = bc_num_mul(x0, &two, &fprime, resrdx);
+
+ if (status) goto err;
+
+ status = bc_num_div(&f, &fprime, &f, resrdx);
+
+ if (status) goto err;
+
+ status = bc_num_sub(x0, &f, x1, resrdx);
+
+ if (status) goto err;
+
+ cmp = bc_num_compareDigits(x1, x0, &digits);
+
+ temp = x0;
+ x0 = x1;
+ x1 = temp;
+ }
+
+ status = bc_num_copy(b, x0);
+
+ if (status) goto err;
+
+ --scale;
+
+ if (b->rdx > scale) status = bc_num_trunc(b, b->rdx - scale);
+ else if (b->rdx < scale) status = bc_num_extend(b, scale - b->rdx);
+
+err:
+
+ bc_num_free(&fprime);
+
+fprime_err:
+
+ bc_num_free(&f);
+
+f_err:
+
+ bc_num_free(&two);
+
+two_err:
+
+ bc_num_free(&num2);
+
+num2_err:
+
+ bc_num_free(&num1);
+
+ return status;
+}
+
+BcStatus bc_num_binary(BcNum *a, BcNum *b, BcNum *c, size_t scale,
+ BcNumBinaryFunc op, size_t req)
+{
+ BcStatus status;
+ BcNum num2;
+ BcNum *ptr_a;
+ BcNum *ptr_b;
+ bool init;
+
+ if (!a || !b || !c || !op) return BC_STATUS_INVALID_PARAM;
+
+ init = false;
+
+ if (c == a) {
+ memcpy(&num2, c, sizeof(BcNum));
+ ptr_a = &num2;
+ init = true;
+ }
+ else ptr_a = a;
+
+ if (c == b) {
+
+ if (c == a) {
+ ptr_b = ptr_a;
+ }
+ else {
+ memcpy(&num2, c, sizeof(BcNum));
+ ptr_b = &num2;
+ init = true;
+ }
+ }
+ else ptr_b = b;
+
+ if (init) status = bc_num_init(c, req);
+ else status = bc_num_expand(c, req);
+
+ if (status) return status;
+
+ status = op(ptr_a, ptr_b, c, scale);
+
+ if (c == a || c == b) bc_num_free(&num2);
+
+ return status;
+}
+
+BcStatus bc_num_unary(BcNum *a, BcNum *b, size_t scale,
+ BcNumUnaryFunc op, size_t req)
+{
+ BcStatus status;
+ BcNum a2;
+ BcNum *ptr_a;
+
+ if (!a || !b || !op) return BC_STATUS_INVALID_PARAM;
+
+ if (b == a) {
+
+ memcpy(&a2, b, sizeof(BcNum));
+ ptr_a = &a2;
+
+ status = bc_num_init(b, req);
+ }
+ else {
+ ptr_a = a;
+ status = bc_num_expand(b, req);
+ }
+
+ if (status) return status;
+
+ status = op(ptr_a, b, scale);
+
+ if (b == a) bc_num_free(&a2);
+
+ return status;
+}
+
+bool bc_num_strValid(const char *val, size_t base) {
+
+ size_t len;
+ size_t i;
+ BcDigit c;
+ BcDigit b;
+ bool radix;
+
+ radix = false;
+
+ len = strlen(val);
+
+ if (!len) return true;
+
+ if (base <= 10) {
+
+ b = base + '0';
+
+ for (i = 0; i < len; ++i) {
+
+ c = val[i];
+
+ if (c == '.') {
+
+ if (radix) return false;
+
+ radix = true;
+ continue;
+ }
+
+ if (c < '0' || c >= b) return false;
+ }
+ }
+ else {
+
+ b = base - 9 + 'A';
+
+ for (i = 0; i < len; ++i) {
+
+ c = val[i];
+
+ if (c == '.') {
+
+ if (radix) return false;
+
+ radix = true;
+ continue;
+ }
+
+ if (!((c >= '0' && c <= '9') || (c >= 'A' && c <= b))) return false;
+ }
+ }
+
+ return true;
+}
+
+BcStatus bc_num_parseDecimal(BcNum *n, const char *val) {
+
+ BcStatus status;
+ size_t len;
+ size_t i;
+ const char *ptr;
+ size_t radix;
+ size_t end;
+ BcDigit *num;
+
+ for (i = 0; val[i] == '0'; ++i);
+
+ val += i;
+
+ len = strlen(val);
+
+ bc_num_zero(n);
+
+ if (len) {
+
+ bool zero;
+
+ zero = true;
+
+ for (i = 0; zero && i < len; ++i) {
+ if (val[i] != '0' && val[i] != '.') zero = false;
+ }
+
+ if (zero) {
+ memset(n->num, 0, sizeof(BcDigit) * n->cap);
+ n->neg = false;
+ return BC_STATUS_SUCCESS;
+ }
+
+ status = bc_num_expand(n, len);
+
+ if (status) return status;
+
+ }
+ else {
+ memset(n->num, 0, sizeof(BcDigit) * n->cap);
+ n->neg = false;
+ return BC_STATUS_SUCCESS;
+ }
+
+ ptr = strchr(val, '.');
+
+ if (ptr) {
+ radix = ptr - val;
+ ++ptr;
+ n->rdx = (val + len) - ptr;
+ }
+ else {
+ radix = len;
+ n->rdx = 0;
+ }
+
+ end = n->rdx - 1;
+
+ for (i = 0; i < n->rdx; ++i) {
+ n->num[i] = BC_NUM_FROM_CHAR(ptr[end - i]);
+ n->len += 1;
+ }
+
+ if (i >= len) return BC_STATUS_SUCCESS;
+
+ num = n->num + n->len;
+ end = radix - 1;
+
+ for (i = 0; i < radix; ++i) {
+ num[i] = BC_NUM_FROM_CHAR(val[end - i]);
+ ++n->len;
+ }
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_parseBase(BcNum *n, const char *val, BcNum *base) {
+
+ BcStatus status;
+ BcNum temp;
+ BcNum mult;
+ BcNum result;
+ size_t i;
+ size_t len;
+ size_t digits;
+ BcDigit c;
+ bool zero;
+
+ len = strlen(val);
+
+ zero = true;
+
+ for (i = 0; zero && i < len; ++i) {
+ c = val[i];
+ zero = (c == '.' || c == '0');
+ }
+
+ if (zero) {
+ bc_num_zero(n);
+ return BC_STATUS_SUCCESS;
+ }
+
+ status = bc_num_init(&temp, BC_NUM_DEF_SIZE);
+
+ if (status) return status;
+
+ status = bc_num_init(&mult, BC_NUM_DEF_SIZE);
+
+ if (status) goto mult_err;
+
+ bc_num_zero(n);
+
+ for (i = 0; i < len && (c = val[i]) != '.'; ++i) {
+
+ long v;
+
+ status = bc_num_mul(n, base, &mult, 0);
+
+ if (status) goto int_err;
+
+ if (c <= '9') v = c - '0';
+ else v = c - 'A' + 10;
+
+ status = bc_num_long2num(&temp, v);
+
+ if (status) goto int_err;
+
+ status = bc_num_add(&mult, &temp, n, 0);
+
+ if (status) goto int_err;
+ }
+
+ if (i == len) c = val[i];
+
+ if (c == '\0') goto int_err;
+
+ assert(c == '.');
+
+ status = bc_num_init(&result, base->len);
+
+ if (status) goto int_err;
+
+ ++i;
+ bc_num_zero(&result);
+ bc_num_one(&mult);
+
+ for (digits = 0; i < len; ++i, ++digits) {
+
+ c = val[i];
+
+ status = bc_num_mul(&result, base, &result, 0);
+
+ if (status) goto err;
+
+ status = bc_num_long2num(&temp, (long) c);
+
+ if (status) goto err;
+
+ status = bc_num_add(&result, &temp, &result, 0);
+
+ if (status) goto err;
+
+ status = bc_num_mul(&mult, base, &mult, 0);
+
+ if (status) goto err;
+ }
+
+ status = bc_num_div(&result, &mult, &result, digits);
+
+ if (status) goto err;
+
+ status = bc_num_add(n, &result, n, 0);
+
+err:
+
+ bc_num_free(&result);
+
+int_err:
+
+ bc_num_free(&mult);
+
+mult_err:
+
+ bc_num_free(&temp);
+
+ return status;
+}
+
+BcStatus bc_num_printRadix(size_t *nchars, FILE *f) {
+
+ if (*nchars + 1 >= BC_NUM_PRINT_WIDTH) {
+ if (fputc('\\', f) == EOF) return BC_STATUS_IO_ERR;
+ if (fputc('\n', f) == EOF) return BC_STATUS_IO_ERR;
+ *nchars = 0;
+ }
+
+ if (fputc('.', f) == EOF) return BC_STATUS_IO_ERR;
+
+ *nchars = *nchars + 1;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_printDigits(unsigned long num, size_t width,
+ size_t *nchars, FILE *f)
+{
+ if (*nchars + width + 1 >= BC_NUM_PRINT_WIDTH) {
+ if (fputc('\\', f) == EOF) return BC_STATUS_IO_ERR;
+ if (fputc('\n', f) == EOF) return BC_STATUS_IO_ERR;
+ *nchars = 0;
+ }
+ else {
+ if (fputc(' ', f) == EOF) return BC_STATUS_IO_ERR;
+ ++(*nchars);
+ }
+
+ if (fprintf(f, "%0*lu", (unsigned int) width, num) < 0)
+ return BC_STATUS_IO_ERR;
+
+ *nchars = *nchars + width;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_printHex(unsigned long num, size_t width,
+ size_t *nchars, FILE *f)
+{
+ if (*nchars + width >= BC_NUM_PRINT_WIDTH) {
+ if (fputc('\\', f) == EOF) return BC_STATUS_IO_ERR;
+ if (fputc('\n', f) == EOF) return BC_STATUS_IO_ERR;
+ *nchars = 0;
+ }
+
+ if (fputc(bc_num_hex_digits[num], f) == EOF) return BC_STATUS_IO_ERR;
+
+ *nchars = *nchars + width;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_printDecimal(BcNum *n, FILE *f) {
+
+ BcStatus status;
+ size_t i;
+ size_t nchars;
+
+ nchars = 0;
+
+ if (n->neg) {
+ if (fputc('-', f) == EOF) return BC_STATUS_IO_ERR;
+ ++nchars;
+ }
+
+ status = BC_STATUS_SUCCESS;
+
+ for (i = n->len - 1; !status && i >= n->rdx && i < n->len; --i)
+ status = bc_num_printHex(n->num[i], 1, &nchars, f);
+
+ if (status || !n->rdx) return status;
+
+ status = bc_num_printRadix(&nchars, f);
+
+ if (status) return status;
+
+ for (; !status && i < n->len; --i)
+ status = bc_num_printHex(n->num[i], 1, &nchars, f);
+
+ return status;
+}
+
+BcStatus bc_num_printBase(BcNum *n, BcNum *base, size_t base_t, FILE* f) {
+
+ BcStatus status;
+ BcVec stack;
+ BcNum intp;
+ BcNum fracp;
+ BcNum digit;
+ BcNum frac_len;
+ size_t nchars;
+ size_t width;
+ BcNumDigitFunc print;
+ size_t i;
+
+ nchars = 0;
+
+ if (n->neg) {
+ if (fputc('-', f) == EOF) return BC_STATUS_IO_ERR;
+ ++nchars;
+ }
+
+ if (base_t <= 16) {
+ width = 1;
+ print = bc_num_printHex;
+ }
+ else {
+ width = (size_t) floor(log10((double) (base_t - 1)) + 1.0);
+ print = bc_num_printDigits;
+ }
+
+ status = bc_vec_init(&stack, sizeof(unsigned long), NULL);
+
+ if (status) return status;
+
+ status = bc_num_init(&intp, n->len);
+
+ if (status) goto int_err;
+
+ status = bc_num_init(&fracp, n->rdx);
+
+ if (status) goto frac_err;
+
+ status = bc_num_init(&digit, width);
+
+ if (status) goto digit_err;
+
+ status = bc_num_copy(&intp, n);
+
+ if (status) goto frac_len_err;
+
+ status = bc_num_truncate(&intp);
+
+ if (status) goto frac_len_err;
+
+ status = bc_num_sub(n, &intp, &fracp, 0);
+
+ if (status) goto frac_len_err;
+
+ while (!BC_NUM_ZERO(&intp)) {
+
+ unsigned long dig;
+
+ status = bc_num_mod(&intp, base, &digit, 0);
+
+ if (status) goto frac_len_err;
+
+ status = bc_num_ulong(&digit, &dig);
+
+ if (status) goto frac_len_err;
+
+ status = bc_vec_push(&stack, &dig);
+
+ if (status) goto frac_len_err;
+
+ status = bc_num_div(&intp, base, &intp, 0);
+
+ if (status) goto frac_len_err;
+ }
+
+ for (i = 0; i < stack.len; ++i) {
+
+ unsigned long *ptr;
+
+ ptr = bc_vec_item_rev(&stack, i);
+
+ status = print(*ptr, width, &nchars, f);
+
+ if (status) goto frac_len_err;
+ }
+
+ if (!n->rdx) goto frac_len_err;
+
+ status = bc_num_printRadix(&nchars, f);
+
+ if (status) goto frac_len_err;
+
+ status = bc_num_init(&frac_len, n->len - n->rdx);
+
+ if (status) goto frac_len_err;
+
+ bc_num_one(&frac_len);
+
+ while (frac_len.len <= n->len) {
+
+ unsigned long fdigit;
+
+ status = bc_num_mul(&fracp, base, &fracp, n->rdx);
+
+ if (status) goto err;
+
+ status = bc_num_ulong(&fracp, &fdigit);
+
+ if (status) goto err;
+
+ status = bc_num_ulong2num(&intp, fdigit);
+
+ if (status) goto err;
+
+ status = bc_num_sub(&fracp, &intp, &fracp, 0);
+
+ if (status) goto err;
+
+ status = print(fdigit, width, &nchars, f);
+
+ if (status) goto err;
+
+ status = bc_num_mul(&frac_len, base, &frac_len, 0);
+
+ if (status) goto err;
+ }
+
+err:
+
+ bc_num_free(&frac_len);
+
+frac_len_err:
+
+ bc_num_free(&digit);
+
+digit_err:
+
+ bc_num_free(&fracp);
+
+frac_err:
+
+ bc_num_free(&intp);
+
+int_err:
+
+ bc_vec_free(&stack);
+
+ return status;
+}
+
+BcStatus bc_num_init(BcNum *n, size_t request) {
+
+ if (!n) return BC_STATUS_INVALID_PARAM;
+
+ memset(n, 0, sizeof(BcNum));
+
+ request = request >= BC_NUM_DEF_SIZE ? request : BC_NUM_DEF_SIZE;
+
+ n->num = malloc(request);
+
+ if (!n->num) return BC_STATUS_MALLOC_FAIL;
+
+ n->cap = request;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_expand(BcNum *n, size_t request) {
+
+ if (!n || !request) return BC_STATUS_INVALID_PARAM;
+
+ if (request > n->cap) {
+
+ BcDigit *temp;
+
+ temp = realloc(n->num, request);
+
+ if (!temp) return BC_STATUS_MALLOC_FAIL;
+
+ memset(temp + n->cap, 0, sizeof(char) * (request - n->cap));
+
+ n->num = temp;
+ n->cap = request;
+ }
+
+ return BC_STATUS_SUCCESS;
+}
+
+void bc_num_free(void *num) {
+
+ BcNum *n;
+
+ if (!num) return;
+
+ n = (BcNum*) num;
+
+ if (n->num) free(n->num);
+
+ memset(n, 0, sizeof(BcNum));
+}
+
+BcStatus bc_num_copy(void *dest, void *src) {
+
+ BcStatus status;
+
+ BcNum *d;
+ BcNum *s;
+
+ if (!dest || !src) return BC_STATUS_INVALID_PARAM;
+
+ if (dest == src) return BC_STATUS_SUCCESS;
+
+ d = (BcNum*) dest;
+ s = (BcNum*) src;
+
+ status = bc_num_expand(d, s->cap);
+
+ if (status) return status;
+
+ d->len = s->len;
+ d->neg = s->neg;
+ d->rdx = s->rdx;
+
+ memcpy(d->num, s->num, sizeof(char) * d->len);
+ memset(d->num + d->len, 0, sizeof(char) * (d->cap - d->len));
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_parse(BcNum *n, const char *val, BcNum *base, size_t base_t) {
+
+ BcStatus status;
+
+ if (!n || !val) return BC_STATUS_INVALID_PARAM;
+
+ if (base_t < BC_NUM_MIN_BASE || base_t > BC_NUM_MAX_INPUT_BASE)
+ return BC_STATUS_EXEC_INVALID_IBASE;
+
+ if (!bc_num_strValid(val, base_t)) return BC_STATUS_MATH_INVALID_STRING;
+
+ if (base_t == 10) status = bc_num_parseDecimal(n, val);
+ else status = bc_num_parseBase(n, val, base);
+
+ return status;
+}
+
+BcStatus bc_num_fprint(BcNum *n, BcNum *base, size_t base_t,
+ bool newline, FILE *f)
+{
+ BcStatus status;
+
+ if (!n || !f) return BC_STATUS_INVALID_PARAM;
+
+ if (base_t < BC_NUM_MIN_BASE || base_t > BC_NUM_MAX_OUTPUT_BASE)
+ return BC_STATUS_EXEC_INVALID_OBASE;
+
+ if (BC_NUM_ZERO(n)) {
+ if (fputc('0', f) == EOF) return BC_STATUS_IO_ERR;
+ status = BC_STATUS_SUCCESS;
+ }
+ else if (base_t == 10) status = bc_num_printDecimal(n, f);
+ else status = bc_num_printBase(n, base, base_t, f);
+
+ if (status) return status;
+
+ if (newline) {
+ if (fputc('\n', f) == EOF) return BC_STATUS_IO_ERR;
+ }
+
+ return status;
+}
+
+BcStatus bc_num_print(BcNum *n, BcNum *base, size_t base_t, bool newline) {
+ return bc_num_fprint(n, base, base_t, newline, stdout);
+}
+
+BcStatus bc_num_long(BcNum *n, long *result) {
+
+ size_t i;
+ unsigned long temp;
+ unsigned long prev;
+ unsigned long pow;
+
+ if (!n || !result) return BC_STATUS_INVALID_PARAM;
+
+ temp = 0;
+ pow = 1;
+
+ for (i = n->rdx; i < n->len; ++i) {
+
+ prev = temp;
+
+ temp += n->num[i] * pow;
+
+ pow *= 10;
+
+ if (temp < prev) return BC_STATUS_MATH_OVERFLOW;
+ }
+
+ if (n->neg) temp = -temp;
+
+ *result = temp;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_ulong(BcNum *n, unsigned long *result) {
+
+ size_t i;
+ unsigned long prev;
+ unsigned long pow;
+
+ if (!n || !result) return BC_STATUS_INVALID_PARAM;
+
+ if (n->neg) return BC_STATUS_MATH_NEGATIVE;
+
+ *result = 0;
+ pow = 1;
+
+ for (i = n->rdx; i < n->len; ++i) {
+
+ prev = *result;
+
+ *result += n->num[i] * pow;
+
+ pow *= 10;
+
+ if (*result < prev) return BC_STATUS_MATH_OVERFLOW;
+ }
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_long2num(BcNum *n, long val) {
+
+ BcStatus status;
+ size_t len;
+ size_t i;
+ BcDigit *ptr;
+ BcDigit carry;
+
+ if (!n) return BC_STATUS_INVALID_PARAM;
+
+ bc_num_zero(n);
+
+ if (!val) {
+ memset(n->num, 0, sizeof(char) * n->cap);
+ return BC_STATUS_SUCCESS;
+ }
+
+ carry = 0;
+
+ if (val < 0) {
+
+ if (val == LONG_MIN) {
+ carry = 1;
+ val += 1;
+ }
+
+ val = -val;
+ n->neg = true;
+ }
+
+ len = (size_t) ceil(log10(((double) ULONG_MAX) + 1.0f));
+
+ status = bc_num_expand(n, len);
+
+ if (status) return status;
+
+ ptr = n->num;
+
+ for (i = 0; val; ++i) {
+ ++n->len;
+ ptr[i] = (char) (val % 10);
+ val /= 10;
+ }
+
+ if (carry) ptr[i - 1] += carry;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_ulong2num(BcNum *n, unsigned long val) {
+
+ BcStatus status;
+ size_t len;
+ size_t i;
+ BcDigit *ptr;
+
+ if (!n) return BC_STATUS_INVALID_PARAM;
+
+ bc_num_zero(n);
+
+ if (!val) {
+ memset(n->num, 0, sizeof(char) * n->cap);
+ return BC_STATUS_SUCCESS;
+ }
+
+ len = (size_t) ceil(log10(((double) ULONG_MAX) + 1.0f));
+
+ status = bc_num_expand(n, len);
+
+ if (status) return status;
+
+ ptr = n->num;
+
+ for (i = 0; val; ++i) {
+ ++n->len;
+ ptr[i] = (char) (val % 10);
+ val /= 10;
+ }
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_num_truncate(BcNum *n) {
+ if (!n) return BC_STATUS_INVALID_PARAM;
+ return bc_num_trunc(n, n->rdx);
+}
+
+BcStatus bc_num_add(BcNum *a, BcNum *b, BcNum *result, size_t scale) {
+
+ BcNumBinaryFunc op;
+
+ (void) scale;
+
+ if ((a->neg && b->neg) || (!a->neg && !b->neg)) op = bc_num_alg_a;
+ else op = bc_num_alg_s;
+
+ return bc_num_binary(a, b, result, false, op, a->len + b->len + 1);
+}
+
+BcStatus bc_num_sub(BcNum *a, BcNum *b, BcNum *result, size_t scale) {
+
+ BcNumBinaryFunc op;
+
+ (void) scale;
+
+ if (a->neg && b->neg) op = bc_num_alg_s;
+ else if (a->neg || b->neg) op = bc_num_alg_a;
+ else op = bc_num_alg_s;
+
+ return bc_num_binary(a, b, result, true, op, a->len + b->len + 1);
+}
+
+BcStatus bc_num_mul(BcNum *a, BcNum *b, BcNum *result, size_t scale) {
+ return bc_num_binary(a, b, result, scale, bc_num_alg_m,
+ a->len + b->len + scale + 1);
+}
+
+BcStatus bc_num_div(BcNum *a, BcNum *b, BcNum *result, size_t scale) {
+ return bc_num_binary(a, b, result, scale, bc_num_alg_d,
+ a->len + b->len + scale + 1);
+}
+
+BcStatus bc_num_mod(BcNum *a, BcNum *b, BcNum *result, size_t scale) {
+ return bc_num_binary(a, b, result, scale, bc_num_alg_mod,
+ a->len + b->len + scale + 1);
+}
+
+BcStatus bc_num_pow(BcNum *a, BcNum *b, BcNum *result, size_t scale) {
+ return bc_num_binary(a, b, result, scale, bc_num_alg_p,
+ (a->len + 1) * (b->len + 1));
+}
+
+BcStatus bc_num_sqrt(BcNum *a, BcNum *result, size_t scale) {
+ return bc_num_unary(a, result, scale, bc_num_sqrt_newton,
+ a->rdx + (a->len - a->rdx) * 2 + 1);
+}
+
+int bc_num_compare(BcNum *a, BcNum *b) {
+ size_t digits;
+ return bc_num_compareDigits(a, b, &digits);
+}
+
+void bc_num_zero(BcNum *n) {
+
+ if (!n) return;
+
+ memset(n->num, 0, n->cap * sizeof(char));
+
+ n->neg = false;
+ n->len = 0;
+ n->rdx = 0;
+}
+
+void bc_num_one(BcNum *n) {
+
+ if (!n) return;
+
+ bc_num_zero(n);
+
+ n->len = 1;
+ n->num[0] = 1;
+}
+
+void bc_num_ten(BcNum *n) {
+
+ if (!n) return;
+
+ bc_num_zero(n);
+
+ n->len = 2;
+ n->num[0] = 0;
+ n->num[1] = 1;
+}
+
+BcStatus bc_func_insert(BcFunc *func, char *name, bool var, BcVec *vec) {
+
+ BcStatus status;
+ BcAuto a;
+ size_t i;
+ BcAuto *ptr;
+
+ if (!func || !name || !vec) return BC_STATUS_INVALID_PARAM;
+
+ for (i = 0; i < func->params.len; ++i) {
+ ptr = bc_vec_item(&func->params, i);
+ if (!strcmp(name, ptr->name))
+ return BC_STATUS_PARSE_DUPLICATE_LOCAL;
+ }
+
+ for (i = 0; i < func->autos.len; ++i) {
+ ptr = bc_vec_item(&func->autos, i);
+ if (!strcmp(name, ptr->name))
+ return BC_STATUS_PARSE_DUPLICATE_LOCAL;
+ }
+
+ status = bc_auto_init(&a, name, var);
+
+ if (status) return status;
+
+ status = bc_vec_push(vec, &a);
+
+ if (status) return status;
+
+ return status;
+}
+
+BcStatus bc_func_init(BcFunc *func) {
+
+ BcStatus status;
+
+ if (!func) return BC_STATUS_INVALID_PARAM;
+
+ status = bc_vec_init(&func->code, sizeof(uint8_t), NULL);
+
+ if (status) return status;
+
+ status = bc_vec_init(&func->params, sizeof(BcAuto), bc_auto_free);
+
+ if (status) goto param_err;
+
+ status = bc_vec_init(&func->autos, sizeof(BcAuto), bc_auto_free);
+
+ if (status) goto auto_err;
+
+ status = bc_vec_init(&func->labels, sizeof(size_t), NULL);
+
+ if (status) goto label_err;
+
+ return BC_STATUS_SUCCESS;
+
+label_err:
+
+ bc_vec_free(&func->autos);
+
+auto_err:
+
+ bc_vec_free(&func->params);
+
+param_err:
+
+ bc_vec_free(&func->code);
+
+ return status;
+}
+
+BcStatus bc_func_insertParam(BcFunc *func, char *name, bool var) {
+ return bc_func_insert(func, name, var, &func->params);
+}
+
+BcStatus bc_func_insertAuto(BcFunc *func, char *name, bool var) {
+ return bc_func_insert(func, name, var, &func->autos);
+}
+
+void bc_func_free(void *func) {
+
+ BcFunc *f;
+
+ f = (BcFunc*) func;
+
+ if (f == NULL) return;
+
+ bc_vec_free(&f->code);
+ bc_vec_free(&f->params);
+ bc_vec_free(&f->autos);
+ bc_vec_free(&f->labels);
+}
+
+BcStatus bc_var_init(void *var) {
+
+ if (!var) return BC_STATUS_INVALID_PARAM;
+
+ return bc_num_init((BcVar*) var, BC_NUM_DEF_SIZE);
+}
+
+void bc_var_free(void *var) {
+
+ BcVar *v;
+
+ v = (BcVar*) var;
+
+ if (v == NULL) return;
+
+ bc_num_free(v);
+}
+
+BcStatus bc_array_init(void *array) {
+
+ if (!array) return BC_STATUS_INVALID_PARAM;
+
+ return bc_vec_init((BcArray*) array, sizeof(BcNum), bc_num_free);
+}
+
+BcStatus bc_array_copy(void *dest, void *src) {
+
+ BcStatus status;
+ size_t i;
+ BcNum *dnum;
+ BcNum *snum;
+
+ BcArray *d;
+ BcArray *s;
+
+ d = (BcArray*) dest;
+ s = (BcArray*) src;
+
+ if (!d || !s || d == s || d->size != s->size || d->dtor != s->dtor)
+ return BC_STATUS_INVALID_PARAM;
+
+ while (d->len) {
+ status = bc_vec_pop(d);
+ if (status) return status;
+ }
+
+ status = bc_vec_expand(d, s->cap);
+
+ if (status) return status;
+
+ d->len = s->len;
+
+ for (i = 0; i < s->len; ++i) {
+
+ dnum = bc_vec_item(d, i);
+ snum = bc_vec_item(s, i);
+
+ if (!dnum || !snum) return BC_STATUS_VEC_OUT_OF_BOUNDS;
+
+ status = bc_num_init(dnum, snum->len);
+
+ if (status) return status;
+
+ status = bc_num_copy(dnum, snum);
+
+ if (status) {
+ bc_num_free(dnum);
+ return status;
+ }
+ }
+
+ return status;
+}
+
+BcStatus bc_array_zero(BcArray *a) {
+
+ BcStatus status;
+
+ status = BC_STATUS_SUCCESS;
+
+ while (!status && a->len) status = bc_vec_pop(a);
+
+ return status;
+}
+
+BcStatus bc_array_expand(BcArray *a, size_t len) {
+
+ BcStatus status;
+
+ status = BC_STATUS_SUCCESS;
+
+ while (len > a->len) {
+
+ BcNum num;
+
+ status = bc_num_init(&num, BC_NUM_DEF_SIZE);
+
+ if (status) return status;
+
+ bc_num_zero(&num);
+
+ status = bc_vec_push(a, &num);
+
+ if (status) {
+ bc_num_free(&num);
+ return status;
+ }
+ }
+
+ return status;
+}
+
+void bc_array_free(void *array) {
+
+ BcArray *a;
+
+ a = (BcArray*) array;
+
+ if (a == NULL) return;
+
+ bc_vec_free(a);
+}
+
+void bc_string_free(void *string) {
+
+ char *s;
+
+ s = *((char**) string);
+
+ free(s);
+}
+
+int bc_entry_cmp(void *entry1, void *entry2) {
+
+ BcEntry *e1;
+ BcEntry *e2;
+ int cmp;
+
+ e1 = (BcEntry*) entry1;
+ e2 = (BcEntry*) entry2;
+
+ if (!strcmp(e1->name, bc_lang_func_main)) {
+ if (!strcmp(e2->name, bc_lang_func_main)) cmp = 0;
+ else cmp = -1;
+ }
+ else if (!strcmp(e1->name, bc_lang_func_read)) {
+ if (!strcmp(e2->name, bc_lang_func_main)) cmp = 1;
+ else if (!strcmp(e2->name, bc_lang_func_read)) cmp = 0;
+ else cmp = -1;
+ }
+ else if (!strcmp(e2->name, bc_lang_func_main)) cmp = 1;
+ else cmp = strcmp(e1->name, e2->name);
+
+ return cmp;
+}
+
+void bc_entry_free(void *entry) {
+
+ BcEntry *e;
+
+ if (!entry) return;
+
+ e = (BcEntry*) entry;
+
+ free(e->name);
+}
+
+BcStatus bc_auto_init(void *auto1, char *name, bool var) {
+
+ BcStatus status;
+ BcAuto *a;
+
+ if (!auto1) return BC_STATUS_INVALID_PARAM;
+
+ a = (BcAuto*) auto1;
+
+ a->var = var;
+ a->name = name;
+
+ if (var) status = bc_num_init(&a->data.num, BC_NUM_DEF_SIZE);
+ else status = bc_vec_init(&a->data.array, sizeof(BcNum), bc_num_free);
+
+ return status;
+}
+
+void bc_auto_free(void *auto1) {
+
+ BcAuto *a;
+
+ if (!auto1) return;
+
+ a = (BcAuto*) auto1;
+
+ if (a->name) free(a->name);
+
+ if (a->var) bc_num_free(&a->data.num);
+ else bc_vec_free(&a->data.array);
+}
+
+void bc_result_free(void *result) {
+
+ BcResult *r;
+
+ if (!result) return;
+
+ r = (BcResult*) result;
+
+ switch (r->type) {
+
+ case BC_RESULT_INTERMEDIATE:
+ case BC_RESULT_SCALE:
+ {
+ bc_num_free(&r->data.num);
+ break;
+ }
+
+ case BC_RESULT_VAR:
+ case BC_RESULT_ARRAY:
+ {
+ if (r->data.id.name) free(r->data.id.name);
+ break;
+ }
+
+ default:
+ {
+ // Do nothing.
+ break;
+ }
+ }
+}
+
+void bc_constant_free(void *constant) {
+
+ char *c;
+
+ if (!constant) return;
+
+ c = *((char**) constant);
+
+ free(c);
+}
+
+long bc_io_frag(char *buf, long len, int term, BcIoGetc bcgetc, void *ctx) {
+
+ long i;
+ int c;
+
+ if (!buf || len < 0 || !bcgetc) return -1;
+
+ for (c = (~term) | 1, i = 0; i < len; i++) {
+
+ if (c == (int) '\0' || c == term || (c = bcgetc(ctx)) == EOF) {
+ buf[i] = '\0';
+ break;
+ }
+
+ buf[i] = (char) c;
+ }
+
+ return i;
+}
+
+int bc_io_xfgetc(void *ctx) {
+ return fgetc((FILE *) ctx);
+}
+
+long bc_io_fgets(char * buf, int n, FILE* fp) {
+
+ long len;
+
+ if (!buf) return -1;
+
+ if (n == 1) {
+ buf[0] = '\0';
+ return 0;
+ }
+
+ if (n < 1 || !fp) return -1;
+
+ len = bc_io_frag(buf, n - 1, (int) '\n', bc_io_xfgetc, fp);
+
+ if (len >= 0) buf[len] = '\0';
+
+ return len;
+}
+
+BcStatus bc_io_fgetline(char** p, size_t *n, FILE* fp) {
+
+ size_t mlen, slen, dlen, len;
+ char *s;
+ char *t;
+
+ if (!p || !n || !fp) return BC_STATUS_INVALID_PARAM;
+
+ if (!p) {
+
+ char blk[64];
+
+ for (slen = 0; ; slen += 64) {
+
+ len = (size_t) bc_io_frag(blk, 64, (int) '\n', bc_io_xfgetc, fp);
+
+ if (len != 64 || blk[len - 1] == '\n' || blk[len - 1] == '\0')
+ return slen + len;
+ }
+ }
+
+ mlen = 8;
+ slen = 0;
+
+ s = *p;
+
+ for (;;) {
+
+ mlen += mlen;
+
+ if ((t = realloc(s, mlen)) == NULL) break;
+
+ s = t;
+ dlen = mlen - slen - 1;
+
+ len = (size_t) bc_io_frag(s + slen, dlen, (int) '\n', bc_io_xfgetc, fp);
+
+ slen += len;
+
+ if (len < dlen || t[slen - 1] == '\n' || t[slen - 1] == '\0') {
+
+ s[slen] = '\0';
+ *p = s;
+ *n = slen;
+
+ return BC_STATUS_SUCCESS;
+ }
+ }
+
+ return BC_STATUS_IO_ERR;
+}
+
+BcStatus bc_io_fread(const char *path, char** buf) {
+
+ BcStatus status;
+ FILE* f;
+ size_t size;
+ size_t read;
+
+ f = fopen(path, "r");
+
+ if (!f) return BC_STATUS_EXEC_FILE_ERR;
+
+ fseek(f, 0, SEEK_END);
+ size = ftell(f);
+
+ fseek(f, 0, SEEK_SET);
+
+ *buf = malloc(size + 1);
+
+ if (!*buf) {
+ status = BC_STATUS_MALLOC_FAIL;
+ goto malloc_err;
+ }
+
+ read = fread(*buf, 1, size, f);
+
+ if (read != size) {
+ status = BC_STATUS_IO_ERR;
+ goto read_err;
+ }
+
+ (*buf)[size] = '\0';
+
+ fclose(f);
+
+ return BC_STATUS_SUCCESS;
+
+read_err:
+
+ free(*buf);
+
+malloc_err:
+
+ fclose(f);
+
+ return status;
+}
+
+BcStatus bc_lex_whitespace(BcLex *lex, BcLexToken *token) {
+
+ char c;
+
+ token->type = BC_LEX_WHITESPACE;
+
+ c = lex->buffer[lex->idx];
+
+ while ((isspace(c) && c != '\n') || c == '\\') {
+ ++lex->idx;
+ c = lex->buffer[lex->idx];
+ }
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_lex_string(BcLex *lex, BcLexToken *token) {
+
+ const char *start;
+ uint32_t newlines;
+ size_t len;
+ size_t i;
+ char c;
+
+ newlines = 0;
+
+ token->type = BC_LEX_STRING;
+
+ i = lex->idx;
+ c = lex->buffer[i];
+
+ while (c != '"' && c != '\0') {
+ if (c == '\n') ++newlines;
+ c = lex->buffer[++i];
+ }
+
+ if (c == '\0') {
+ lex->idx = i;
+ return BC_STATUS_LEX_NO_STRING_END;
+ }
+
+ len = i - lex->idx;
+
+ token->string = malloc(len + 1);
+
+ if (!token->string) return BC_STATUS_MALLOC_FAIL;
+
+ start = lex->buffer + lex->idx;
+
+ for (size_t j = 0; j < len; ++j) token->string[j] = start[j];
+
+ token->string[len] = '\0';
+
+ lex->idx = i + 1;
+ lex->line += newlines;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_lex_comment(BcLex *lex, BcLexToken *token) {
+
+ uint32_t newlines;
+ bool end;
+ size_t i;
+ const char *buffer;
+ char c;
+
+ newlines = 0;
+
+ token->type = BC_LEX_WHITESPACE;
+
+ ++lex->idx;
+
+ i = lex->idx;
+ buffer = lex->buffer;
+
+ end = false;
+
+ while (!end) {
+
+ c = buffer[i];
+
+ while (c != '*' && c != '\0') {
+ if (c == '\n') ++newlines;
+ c = buffer[++i];
+ }
+
+ if (c == '\0' || buffer[i + 1] == '\0') {
+ lex->idx = i;
+ return BC_STATUS_LEX_NO_COMMENT_END;
+ }
+
+ end = buffer[i + 1] == '/';
+ i += end ? 0 : 1;
+ }
+
+ lex->idx = i + 2;
+ lex->line += newlines;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_lex_number(BcLex *lex, BcLexToken *token, char start) {
+
+ const char *buffer;
+ const char *buf;
+ size_t backslashes;
+ size_t len;
+ size_t hits;
+ size_t i, j;
+ char c;
+ bool point;
+
+ token->type = BC_LEX_NUMBER;
+
+ point = start == '.';
+
+ buffer = lex->buffer + lex->idx;
+
+ backslashes = 0;
+ i = 0;
+ c = buffer[i];
+
+ while (c && ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F') ||
+ (c == '.' && !point) || (c == '\\' && buffer[i + 1] == '\n')))
+ {
+ if (c == '\\') {
+ ++i;
+ backslashes += 1;
+ }
+
+ c = buffer[++i];
+ }
+
+ len = i + 1;
+
+ token->string = malloc(len - backslashes + 1);
+
+ if (!token->string) return BC_STATUS_MALLOC_FAIL;
+
+ token->string[0] = start;
+
+ buf = buffer - 1;
+ hits = 0;
+
+ for (j = 1; j < len; ++j) {
+
+ c = buf[j];
+
+ // If we have hit a backslash, skip it.
+ // We don't have to check for a newline
+ // because it's guaranteed.
+ if (hits < backslashes && c == '\\') {
+ ++hits;
+ ++j;
+ continue;
+ }
+
+ token->string[j - (hits * 2)] = c;
+ }
+
+ token->string[len] = '\0';
+
+ lex->idx += i;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_lex_name(BcLex *lex, BcLexToken *token) {
+
+ BcStatus status;
+ const char *buffer;
+ size_t i;
+ char c;
+
+ buffer = lex->buffer + lex->idx - 1;
+
+ for (i = 0; i < sizeof(bc_lex_keywords) / sizeof(bc_lex_keywords[0]); ++i) {
+
+ if (!strncmp(buffer, bc_lex_keywords[i].name, bc_lex_keywords[i].len)) {
+
+ token->type = BC_LEX_KEY_AUTO + i;
+
+ if (!bc_lex_keywords[i].posix &&
+ (status = bc_posix_error(BC_STATUS_POSIX_INVALID_KEYWORD,
+ lex->file, lex->line,
+ bc_lex_keywords[i].name)))
+ {
+ return status;
+ }
+
+ // We need to minus one because the
+ // index has already been incremented.
+ lex->idx += bc_lex_keywords[i].len - 1;
+
+ return BC_STATUS_SUCCESS;
+ }
+ }
+
+ token->type = BC_LEX_NAME;
+
+ i = 0;
+ c = buffer[i];
+
+ while ((c >= 'a' && c<= 'z') || (c >= '0' && c <= '9') || c == '_') {
+ ++i;
+ c = buffer[i];
+ }
+
+ if (i > 1 && (status = bc_posix_error(BC_STATUS_POSIX_NAME_LEN,
+ lex->file, lex->line, buffer)))
+ {
+ return status;
+ }
+
+ token->string = malloc(i + 1);
+
+ if (!token->string) return BC_STATUS_MALLOC_FAIL;
+
+ strncpy(token->string, buffer, i);
+ token->string[i] = '\0';
+
+ // Increment the index. It is minus one
+ // because it has already been incremented.
+ lex->idx += i - 1;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_lex_token(BcLex *lex, BcLexToken *token) {
+
+ BcStatus status;
+ char c;
+ char c2;
+
+ status = BC_STATUS_SUCCESS;
+
+ c = lex->buffer[lex->idx];
+
+ ++lex->idx;
+
+ // This is the workhorse of the lexer.
+ switch (c) {
+
+ case '\0':
+ {
+ token->type = BC_LEX_EOF;
+ break;
+ }
+
+ case '\t':
+ {
+ status = bc_lex_whitespace(lex, token);
+ break;
+ }
+
+ case '\n':
+ {
+ lex->newline = true;
+ token->type = BC_LEX_NEWLINE;
+ break;
+ }
+
+ case '\v':
+ case '\f':
+ case '\r':
+ case ' ':
+ {
+ status = bc_lex_whitespace(lex, token);
+ break;
+ }
+
+ case '!':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '=') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_REL_NOT_EQ;
+ }
+ else {
+
+ if ((status = bc_posix_error(BC_STATUS_POSIX_BOOL_OPS,
+ lex->file, lex->line, "!")))
+ {
+ return status;
+ }
+
+ token->type = BC_LEX_OP_BOOL_NOT;
+ }
+
+ break;
+ }
+
+ case '"':
+ {
+ status = bc_lex_string(lex, token);
+ break;
+ }
+
+ case '#':
+ {
+ if ((status = bc_posix_error(BC_STATUS_POSIX_SCRIPT_COMMENT,
+ lex->file, lex->line, NULL)))
+ {
+ return status;
+ }
+
+ token->type = BC_LEX_WHITESPACE;
+
+ ++lex->idx;
+ while (lex->idx < lex->len && lex->buffer[lex->idx] != '\n') ++lex->idx;
+
+ break;
+ }
+
+ case '%':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '=') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_ASSIGN_MODULUS;
+ }
+ else token->type = BC_LEX_OP_MODULUS;
+
+ break;
+ }
+
+ case '&':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '&') {
+
+ if ((status = bc_posix_error(BC_STATUS_POSIX_BOOL_OPS,
+ lex->file, lex->line, "&&")))
+ {
+ return status;
+ }
+
+ ++lex->idx;
+ token->type = BC_LEX_OP_BOOL_AND;
+ }
+ else {
+ token->type = BC_LEX_INVALID;
+ status = BC_STATUS_LEX_INVALID_TOKEN;
+ }
+
+ break;
+ }
+
+ case '(':
+ {
+ token->type = BC_LEX_LEFT_PAREN;
+ break;
+ }
+
+ case ')':
+ {
+ token->type = BC_LEX_RIGHT_PAREN;
+ break;
+ }
+
+ case '*':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '=') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_ASSIGN_MULTIPLY;
+ }
+ else token->type = BC_LEX_OP_MULTIPLY;
+
+ break;
+ }
+
+ case '+':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '=') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_ASSIGN_PLUS;
+ }
+ else if (c2 == '+') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_INC;
+ }
+ else token->type = BC_LEX_OP_PLUS;
+
+ break;
+ }
+
+ case ',':
+ {
+ token->type = BC_LEX_COMMA;
+ break;
+ }
+
+ case '-':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '=') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_ASSIGN_MINUS;
+ }
+ else if (c2 == '-') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_DEC;
+ }
+ else token->type = BC_LEX_OP_MINUS;
+
+ break;
+ }
+
+ case '.':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (isdigit(c2)) {
+ status = bc_lex_number(lex, token, c);
+ }
+ else {
+
+ status = bc_posix_error(BC_STATUS_POSIX_DOT_LAST,
+ lex->file, lex->line, NULL);
+
+ token->type = BC_LEX_KEY_LAST;
+ }
+
+ break;
+ }
+
+ case '/':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '=') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_ASSIGN_DIVIDE;
+ }
+ else if (c2 == '*') status = bc_lex_comment(lex, token);
+ else token->type = BC_LEX_OP_DIVIDE;
+
+ break;
+ }
+
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ {
+ status = bc_lex_number(lex, token, c);
+ break;
+ }
+
+ case ';':
+ {
+ token->type = BC_LEX_SEMICOLON;
+ break;
+ }
+
+ case '<':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '=') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_REL_LESS_EQ;
+ }
+ else token->type = BC_LEX_OP_REL_LESS;
+
+ break;
+ }
+
+ case '=':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '=') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_REL_EQUAL;
+ }
+ else token->type = BC_LEX_OP_ASSIGN;
+
+ break;
+ }
+
+ case '>':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '=') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_REL_GREATER_EQ;
+ }
+ else token->type = BC_LEX_OP_REL_GREATER;
+
+ break;
+ }
+
+ case 'A':
+ case 'B':
+ case 'C':
+ case 'D':
+ case 'E':
+ case 'F':
+ {
+ status = bc_lex_number(lex, token, c);
+ break;
+ }
+
+ case '[':
+ {
+ token->type = BC_LEX_LEFT_BRACKET;
+ break;
+ }
+
+ case '\\':
+ {
+ status = bc_lex_whitespace(lex, token);
+ break;
+ }
+
+ case ']':
+ {
+ token->type = BC_LEX_RIGHT_BRACKET;
+ break;
+ }
+
+ case '^':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '=') {
+ ++lex->idx;
+ token->type = BC_LEX_OP_ASSIGN_POWER;
+ }
+ else token->type = BC_LEX_OP_POWER;
+
+ break;
+ }
+
+ case 'a':
+ case 'b':
+ case 'c':
+ case 'd':
+ case 'e':
+ case 'f':
+ case 'g':
+ case 'h':
+ case 'i':
+ case 'j':
+ case 'k':
+ case 'l':
+ case 'm':
+ case 'n':
+ case 'o':
+ case 'p':
+ case 'q':
+ case 'r':
+ case 's':
+ case 't':
+ case 'u':
+ case 'v':
+ case 'w':
+ case 'x':
+ case 'y':
+ case 'z':
+ {
+ status = bc_lex_name(lex, token);
+ break;
+ }
+
+ case '{':
+ {
+ token->type = BC_LEX_LEFT_BRACE;
+ break;
+ }
+
+ case '|':
+ {
+ c2 = lex->buffer[lex->idx];
+
+ if (c2 == '|') {
+
+ if ((status = bc_posix_error(BC_STATUS_POSIX_BOOL_OPS,
+ lex->file, lex->line, "||")))
+ {
+ return status;
+ }
+
+ ++lex->idx;
+ token->type = BC_LEX_OP_BOOL_OR;
+ }
+ else {
+ token->type = BC_LEX_INVALID;
+ status = BC_STATUS_LEX_INVALID_TOKEN;
+ }
+
+ break;
+ }
+
+ case '}':
+ {
+ token->type = BC_LEX_RIGHT_BRACE;
+ break;
+ }
+
+ default:
+ {
+ token->type = BC_LEX_INVALID;
+ status = BC_STATUS_LEX_INVALID_TOKEN;
+ break;
+ }
+ }
+
+ return status;
+}
+
+BcStatus bc_lex_printToken(BcLexToken *token) {
+
+ printf("<%s", bc_lex_token_type_strs[token->type]);
+
+ switch (token->type) {
+
+ case BC_LEX_STRING:
+ case BC_LEX_NAME:
+ case BC_LEX_NUMBER:
+ {
+ printf(":%s", token->string);
+ break;
+ }
+
+ default:
+ {
+ // Do nothing.
+ break;
+ }
+ }
+
+ putchar('>');
+ putchar('\n');
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_lex_init(BcLex *lex, const char *file) {
+
+ if (lex == NULL ) return BC_STATUS_INVALID_PARAM;
+
+ lex->line = 1;
+ lex->newline = false;
+ lex->file = file;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_lex_text(BcLex *lex, const char *text) {
+
+ if (lex == NULL || text == NULL) return BC_STATUS_INVALID_PARAM;
+
+ lex->buffer = text;
+ lex->idx = 0;
+ lex->len = strlen(text);
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_lex_next(BcLex *lex, BcLexToken *token) {
+
+ BcStatus status;
+
+ if (lex == NULL || token == NULL) return BC_STATUS_INVALID_PARAM;
+
+ if (lex->idx == lex->len) {
+ token->type = BC_LEX_EOF;
+ return BC_STATUS_LEX_EOF;
+ }
+
+ if (lex->newline) {
+ ++lex->line;
+ lex->newline = false;
+ }
+
+ // Loop until failure or we don't have whitespace. This
+ // is so the parser doesn't get inundated with whitespace.
+ do {
+ token->string = NULL;
+ status = bc_lex_token(lex, token);
+ } while (!status && token->type == BC_LEX_WHITESPACE);
+
+ return status;
+}
+
+BcStatus bc_parse_else(BcParse *parse, BcVec *code);
+BcStatus bc_parse_semicolonListEnd(BcParse *parse, BcVec *code);
+BcStatus bc_parse_stmt(BcParse *parse, BcVec *code);
+
+BcStatus bc_parse_pushName(BcVec *code, char *name) {
+
+ BcStatus status;
+ size_t len;
+
+ status = BC_STATUS_SUCCESS;
+ len = strlen(name);
+
+ for (size_t i = 0; !status && i < len; ++i)
+ status = bc_vec_pushByte(code, (uint8_t) name[i]);
+
+ if (status) return status;
+
+ free(name);
+
+ return bc_vec_pushByte(code, (uint8_t) ':');
+}
+
+BcStatus bc_parse_pushIndex(BcVec *code, size_t idx) {
+
+ BcStatus status;
+ uint8_t amt;
+ uint8_t nums[sizeof(size_t)];
+ uint32_t i;
+
+ amt = 0;
+ i = 0;
+
+ while (idx) {
+ nums[amt] = (uint8_t) idx;
+ idx &= ~(0xFF);
+ idx >>= sizeof(uint8_t) * CHAR_BIT;
+ ++amt;
+ }
+
+ status = bc_vec_pushByte(code, amt);
+
+ if (status) return status;
+
+ while (!status && i < amt) {
+ status = bc_vec_pushByte(code, nums[i]);
+ ++i;
+ }
+
+ return status;
+}
+
+BcStatus bc_parse_operator(BcParse *parse, BcVec *code, BcVec *ops,
+ BcLexTokenType t, uint32_t *num_exprs,
+ bool next)
+{
+ BcStatus status;
+ BcLexTokenType top;
+ BcLexTokenType *ptr;
+ uint8_t lp;
+ uint8_t rp;
+ bool rleft;
+
+ rp = bc_parse_ops[t].prec;
+ rleft = bc_parse_ops[t].left;
+
+ if (ops->len != 0) {
+
+ ptr = bc_vec_top(ops);
+ top = *ptr;
+
+ if (top != BC_LEX_LEFT_PAREN) {
+
+ lp = bc_parse_ops[top].prec;
+
+ while (lp < rp || (lp == rp && rleft)) {
+
+ status = bc_vec_pushByte(code, bc_parse_insts[top - BC_LEX_OP_NEGATE]);
+
+ if (status) return status;
+
+ status = bc_vec_pop(ops);
+
+ if (status) return status;
+
+ *num_exprs -= top != BC_LEX_OP_BOOL_NOT &&
+ top != BC_LEX_OP_NEGATE ? 1 : 0;
+
+ if (ops->len == 0) break;
+
+ ptr = bc_vec_top(ops);
+ top = *ptr;
+
+ if (top == BC_LEX_LEFT_PAREN) break;
+
+ lp = bc_parse_ops[top].prec;
+ }
+ }
+ }
+
+ status = bc_vec_push(ops, &t);
+
+ if (status) return status;
+
+ if (next && (status = bc_lex_next(&parse->lex, &parse->token))) goto err;
+
+ return status;
+
+err:
+
+ if (parse->token.string) free(parse->token.string);
+
+ return status;
+}
+
+BcStatus bc_parse_rightParen(BcParse *parse, BcVec *code,
+ BcVec *ops, uint32_t *nexs)
+{
+ BcStatus status;
+ BcLexTokenType top;
+ BcLexTokenType *ptr;
+
+ if (ops->len == 0) return BC_STATUS_PARSE_INVALID_EXPR;
+
+ ptr = bc_vec_top(ops);
+ top = *ptr;
+
+ while (top != BC_LEX_LEFT_PAREN) {
+
+ status = bc_vec_pushByte(code, bc_parse_insts[top - BC_LEX_OP_NEGATE]);
+
+ if (status) return status;
+
+ status = bc_vec_pop(ops);
+
+ if (status) return status;
+
+ *nexs -= top != BC_LEX_OP_BOOL_NOT &&
+ top != BC_LEX_OP_NEGATE ? 1 : 0;
+
+ if (ops->len == 0) return BC_STATUS_PARSE_INVALID_EXPR;
+
+ ptr = bc_vec_top(ops);
+ top = *ptr;
+ }
+
+ status = bc_vec_pop(ops);
+
+ if (status) return status;
+
+ return bc_lex_next(&parse->lex, &parse->token);
+}
+
+BcStatus bc_parse_params(BcParse *parse, BcVec *code, uint8_t flags) {
+
+ BcStatus status;
+ bool comma;
+ size_t nparams;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type == BC_LEX_RIGHT_PAREN) {
+
+ status = bc_vec_pushByte(code, BC_INST_CALL);
+
+ if (status) return status;
+
+ return bc_vec_pushByte(code, 0);
+ }
+
+ nparams = 0;
+
+ do {
+
+ ++nparams;
+
+ status = bc_parse_expr(parse, code, flags & ~(BC_PARSE_EXPR_PRINT));
+
+ if (status) return status;
+
+ if (parse->token.type == BC_LEX_COMMA) {
+
+ comma = true;
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+ }
+ else comma = false;
+
+ } while (!status && parse->token.type != BC_LEX_RIGHT_PAREN);
+
+ if (status) return status;
+
+ if (comma) return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_vec_pushByte(code, BC_INST_CALL);
+
+ if (status) return status;
+
+ return bc_parse_pushIndex(code, nparams);
+}
+
+BcStatus bc_parse_call(BcParse *parse, BcVec *code,
+ char *name, uint8_t flags)
+{
+ BcStatus status;
+ BcEntry entry;
+ BcEntry *entry_ptr;
+ size_t idx;
+
+ entry.name = name;
+
+ status = bc_parse_params(parse, code, flags);
+
+ if (status) goto err;
+
+ if (parse->token.type != BC_LEX_RIGHT_PAREN) {
+ status = BC_STATUS_PARSE_INVALID_TOKEN;
+ goto err;
+ }
+
+ idx = bc_veco_index(&parse->program->func_map, &entry);
+
+ if (idx == BC_INVALID_IDX) {
+
+ status = bc_program_func_add(parse->program, name, &idx);
+
+ if (status) return status;
+
+ name = NULL;
+ }
+ else free(name);
+
+ entry_ptr = bc_veco_item(&parse->program->func_map, idx);
+
+ if (!entry_ptr) return BC_STATUS_EXEC_UNDEFINED_FUNC;
+
+ status = bc_parse_pushIndex(code, entry_ptr->idx);
+
+ if (status) return status;
+
+ return bc_lex_next(&parse->lex, &parse->token);
+
+err:
+
+ if (name) free(name);
+
+ return status;
+}
+
+BcStatus bc_parse_expr_name(BcParse *parse, BcVec *code,
+ BcExprType *type, uint8_t flags)
+{
+ BcStatus status;
+ char *name;
+
+ name = parse->token.string;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) goto err;
+
+ if (parse->token.type == BC_LEX_LEFT_BRACKET) {
+
+ *type = BC_EXPR_ARRAY_ELEM;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) goto err;
+
+ status = bc_parse_expr(parse, code, flags);
+
+ if (status) goto err;
+
+ if (parse->token.type != BC_LEX_RIGHT_BRACKET) {
+ status = BC_STATUS_PARSE_INVALID_TOKEN;
+ goto err;
+ }
+
+ status = bc_vec_pushByte(code, BC_INST_PUSH_ARRAY);
+
+ if (status) goto err;
+
+ status = bc_parse_pushName(code, name);
+ }
+ else if (parse->token.type == BC_LEX_LEFT_PAREN) {
+
+ if (flags & BC_PARSE_EXPR_NO_CALL) {
+ status = BC_STATUS_PARSE_INVALID_TOKEN;
+ goto err;
+ }
+
+ *type = BC_EXPR_FUNC_CALL;
+
+ status = bc_parse_call(parse, code, name, flags);
+ }
+ else {
+
+ *type = BC_EXPR_VAR;
+
+ status = bc_vec_pushByte(code, BC_INST_PUSH_VAR);
+
+ if (status) goto err;
+
+ status = bc_parse_pushName(code, name);
+ }
+
+ return status;
+
+err:
+
+ free(name);
+
+ return status;
+}
+
+BcStatus bc_parse_read(BcParse *parse, BcVec *code) {
+
+ BcStatus status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_LEFT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_RIGHT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_vec_pushByte(code, BC_INST_READ);
+
+ if (status) return status;
+
+ return bc_lex_next(&parse->lex, &parse->token);
+}
+
+BcStatus bc_parse_builtin(BcParse *parse, BcVec *code,
+ BcLexTokenType type, uint8_t flags)
+{
+ BcStatus status;
+ uint8_t inst;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_LEFT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ status = bc_parse_expr(parse, code, flags & ~(BC_PARSE_EXPR_PRINT));
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_RIGHT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ inst = type == BC_LEX_KEY_LENGTH ? BC_INST_LENGTH : BC_INST_SQRT;
+
+ status = bc_vec_pushByte(code, inst);
+
+ if (status) return status;
+
+ return bc_lex_next(&parse->lex, &parse->token);
+}
+
+BcStatus bc_parse_scale(BcParse *parse, BcVec *code,
+ BcExprType *type, uint8_t flags)
+{
+ BcStatus status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_LEFT_PAREN) {
+
+ *type = BC_EXPR_SCALE;
+
+ return bc_vec_pushByte(code, BC_INST_PUSH_SCALE);
+ }
+
+ *type = BC_EXPR_SCALE_FUNC;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ status = bc_parse_expr(parse, code, flags);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_RIGHT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_vec_pushByte(code, BC_INST_SCALE_FUNC);
+
+ if (status) return status;
+
+ return bc_lex_next(&parse->lex, &parse->token);
+}
+
+BcStatus bc_parse_incdec(BcParse *parse, BcVec *code, BcExprType *prev,
+ uint32_t *nexprs, uint8_t flags)
+{
+ BcStatus status;
+ BcLexTokenType type;
+ BcExprType etype;
+ uint8_t inst;
+
+ etype = *prev;
+
+ if (etype == BC_EXPR_VAR || etype == BC_EXPR_ARRAY_ELEM ||
+ etype == BC_EXPR_SCALE || etype == BC_EXPR_LAST ||
+ etype == BC_EXPR_IBASE || etype == BC_EXPR_OBASE)
+ {
+ *prev = parse->token.type == BC_LEX_OP_INC ?
+ BC_EXPR_INC_POST : BC_EXPR_DEC_POST;
+
+ inst = parse->token.type == BC_LEX_OP_INC ?
+ BC_INST_INC_DUP : BC_INST_DEC_DUP;
+
+ status = bc_vec_pushByte(code, inst);
+
+ if (status) return status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+ }
+ else {
+
+ inst = parse->token.type == BC_LEX_OP_INC ? BC_INST_INC : BC_INST_DEC;
+
+ *prev = parse->token.type == BC_LEX_OP_INC ?
+ BC_EXPR_INC_PRE : BC_EXPR_DEC_PRE;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ type = parse->token.type;
+
+ // Because we parse the next part of the expression
+ // right here, we need to increment this.
+ *nexprs = *nexprs + 1;
+
+ switch (type) {
+
+ case BC_LEX_NAME:
+ {
+ status = bc_parse_expr_name(parse, code, prev,
+ flags | BC_PARSE_EXPR_NO_CALL);
+ break;
+ }
+
+ case BC_LEX_KEY_IBASE:
+ {
+ status = bc_vec_pushByte(code, BC_INST_PUSH_IBASE);
+
+ if (status) return status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ break;
+ }
+
+ case BC_LEX_KEY_LAST:
+ {
+ status = bc_vec_pushByte(code, BC_INST_PUSH_LAST);
+
+ if (status) return status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ break;
+ }
+
+ case BC_LEX_KEY_OBASE:
+ {
+ status = bc_vec_pushByte(code, BC_INST_PUSH_OBASE);
+
+ if (status) return status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ break;
+ }
+
+ case BC_LEX_KEY_SCALE:
+ {
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type == BC_LEX_LEFT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_vec_pushByte(code, BC_INST_PUSH_SCALE);
+
+ break;
+ }
+
+ default:
+ {
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+ }
+ }
+
+ if (status) return status;
+
+ status = bc_vec_pushByte(code, inst);
+ }
+
+ return status;
+}
+
+BcStatus bc_parse_minus(BcParse *parse, BcVec *exs, BcVec *ops,
+ BcExprType *prev, bool rparen, uint32_t *nexprs)
+{
+ BcStatus status;
+ BcLexTokenType type;
+ BcExprType etype;
+
+ etype = *prev;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ type = parse->token.type;
+
+ if (type != BC_LEX_NAME && type != BC_LEX_NUMBER &&
+ type != BC_LEX_KEY_SCALE && type != BC_LEX_KEY_LAST &&
+ type != BC_LEX_KEY_IBASE && type != BC_LEX_KEY_OBASE &&
+ type != BC_LEX_LEFT_PAREN && type != BC_LEX_OP_MINUS &&
+ type != BC_LEX_OP_INC && type != BC_LEX_OP_DEC &&
+ type != BC_LEX_OP_BOOL_NOT)
+ {
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+ }
+
+ type = rparen || etype == BC_EXPR_INC_POST || etype == BC_EXPR_DEC_POST ||
+ (etype >= BC_EXPR_NUMBER && etype <= BC_EXPR_SQRT) ?
+ BC_LEX_OP_MINUS : BC_LEX_OP_NEGATE;
+
+ *prev = BC_PARSE_TOKEN_TO_EXPR(type);
+
+ if (type == BC_LEX_OP_MINUS)
+ status = bc_parse_operator(parse, exs, ops, type, nexprs, false);
+ else
+ // We can just push onto the op stack because this is the largest
+ // precedence operator that gets pushed. Inc/dec does not.
+ status = bc_vec_push(ops, &type);
+
+ return status;
+}
+
+BcStatus bc_parse_string(BcParse *parse, BcVec *code) {
+
+ BcStatus status;
+ size_t len;
+
+ len = parse->program->strings.len;
+
+ status = bc_vec_push(&parse->program->strings, &parse->token.string);
+
+ if (status) return status;
+
+ status = bc_vec_pushByte(code, BC_INST_STR);
+
+ if (status) return status;
+
+ status = bc_parse_pushIndex(code, len);
+
+ if (status) return status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ return bc_parse_semicolonListEnd(parse, code);
+}
+
+BcStatus bc_parse_print(BcParse *parse, BcVec *code) {
+
+ BcStatus status;
+ BcLexTokenType type;
+ bool comma;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ type = parse->token.type;
+
+ if (type == BC_LEX_SEMICOLON || type == BC_LEX_NEWLINE)
+ return BC_STATUS_PARSE_INVALID_PRINT;
+
+ comma = false;
+
+ while (!status && type != BC_LEX_SEMICOLON && type != BC_LEX_NEWLINE) {
+
+ if (type == BC_LEX_STRING) {
+
+ size_t len;
+
+ len = parse->program->strings.len;
+
+ status = bc_vec_push(&parse->program->strings, &parse->token.string);
+
+ if (status) return status;
+
+ status = bc_vec_pushByte(code, BC_INST_PRINT_STR);
+
+ if (status) return status;
+
+ status = bc_parse_pushIndex(code, len);
+ }
+ else {
+
+ status = bc_parse_expr(parse, code, 0);
+
+ if (status) return status;
+
+ status = bc_vec_pushByte(code, BC_INST_PRINT_EXPR);
+ }
+
+ if (status) return status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type == BC_LEX_COMMA) {
+ comma = true;
+ status = bc_lex_next(&parse->lex, &parse->token);
+ }
+ else comma = false;
+
+ type = parse->token.type;
+ }
+
+ if (status) return status;
+
+ if (comma) return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ return bc_lex_next(&parse->lex, &parse->token);
+}
+
+BcStatus bc_parse_return(BcParse *parse, BcVec *code) {
+
+ BcStatus status;
+
+ if (!BC_PARSE_FUNC(parse)) return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_NEWLINE &&
+ parse->token.type != BC_LEX_SEMICOLON &&
+ parse->token.type != BC_LEX_LEFT_PAREN &&
+ (status = bc_posix_error(BC_STATUS_POSIX_RETURN_PARENS,
+ parse->lex.file, parse->lex.line, NULL)))
+ {
+ return status;
+ }
+
+ if (parse->token.type == BC_LEX_NEWLINE ||
+ parse->token.type == BC_LEX_SEMICOLON)
+ {
+ status = bc_vec_pushByte(code, BC_INST_RETURN_ZERO);
+ }
+ else {
+
+ status = bc_parse_expr(parse, code, 0);
+
+ if (status) return status;
+
+ status = bc_vec_pushByte(code, BC_INST_RETURN);
+ }
+
+ return status;
+}
+
+BcStatus bc_parse_endBody(BcParse *parse, BcVec *code, bool brace) {
+
+ BcStatus status;
+ uint8_t *flag_ptr;
+
+ if (parse->flags.len <= 1 || parse->num_braces == 0)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ flag_ptr = bc_vec_top(&parse->flags);
+
+ if (!flag_ptr) return BC_STATUS_PARSE_BUG;
+
+ if (brace) {
+
+ if (parse->token.type == BC_LEX_RIGHT_BRACE) {
+
+ if (!parse->num_braces) return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ --parse->num_braces;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+ }
+ else return BC_STATUS_PARSE_INVALID_TOKEN;
+ }
+
+ if (BC_PARSE_IF(parse)) {
+
+ while (parse->token.type == BC_LEX_NEWLINE) {
+ status = bc_lex_next(&parse->lex, &parse->token);
+ if (status) return status;
+ }
+
+ status = bc_vec_pop(&parse->flags);
+
+ if (status) return status;
+
+ flag_ptr = BC_PARSE_TOP_FLAG_PTR(parse);
+ *flag_ptr = (*flag_ptr | BC_PARSE_FLAG_IF_END);
+
+ if (parse->token.type == BC_LEX_KEY_ELSE)
+ status = bc_parse_else(parse, code);
+ }
+ else if (BC_PARSE_FUNC_INNER(parse)) {
+
+ parse->func = 0;
+
+ status = bc_vec_pushByte(code, BC_INST_RETURN_ZERO);
+
+ if (status) return status;
+
+ status = bc_vec_pop(&parse->flags);
+ }
+ else {
+
+ BcInstPtr *ip;
+ BcFunc *func;
+ size_t *label;
+
+ ip = bc_vec_top(&parse->exit_labels);
+
+ if (!ip) return BC_STATUS_PARSE_BUG;
+
+ status = bc_vec_pushByte(code, BC_INST_JUMP);
+
+ if (status) return status;
+
+ label = bc_vec_top(&parse->cond_labels);
+
+ if (!label) return BC_STATUS_PARSE_BUG;
+
+ status = bc_parse_pushIndex(code, *label);
+
+ if (status) return status;
+
+ func = bc_vec_item(&parse->program->funcs, parse->func);
+
+ if (!func) return BC_STATUS_PARSE_BUG;
+
+ label = bc_vec_item(&func->labels, ip->idx);
+
+ if (!label) return BC_STATUS_PARSE_BUG;
+
+ *label = code->len;
+
+ status = bc_vec_pop(&parse->flags);
+ }
+
+ return status;
+}
+
+BcStatus bc_parse_startBody(BcParse *parse, uint8_t flags) {
+
+ uint8_t *flag_ptr;
+
+ flag_ptr = BC_PARSE_TOP_FLAG_PTR(parse);
+
+ if (!flag_ptr) return BC_STATUS_PARSE_BUG;
+
+ flags |= (*flag_ptr & (BC_PARSE_FLAG_FUNC | BC_PARSE_FLAG_LOOP));
+ flags |= BC_PARSE_FLAG_BODY;
+
+ return bc_vec_push(&parse->flags, &flags);
+}
+
+BcStatus bc_parse_noElse(BcParse *parse, BcVec *code) {
+
+ uint8_t *flag_ptr;
+ BcInstPtr *ip;
+ BcFunc *func;
+ size_t *label;
+
+ flag_ptr = BC_PARSE_TOP_FLAG_PTR(parse);
+ *flag_ptr = (*flag_ptr & ~(BC_PARSE_FLAG_IF_END));
+
+ ip = bc_vec_top(&parse->exit_labels);
+
+ if (!ip || ip->func || ip->len) return BC_STATUS_PARSE_BUG;
+
+ func = bc_vec_item(&parse->program->funcs, parse->func);
+
+ if (!func || code != &func->code) return BC_STATUS_PARSE_BUG;
+
+ label = bc_vec_item(&func->labels, ip->idx);
+
+ if (!label) return BC_STATUS_PARSE_BUG;
+
+ *label = code->len;
+
+ return bc_vec_pop(&parse->exit_labels);
+}
+
+BcStatus bc_parse_if(BcParse *parse, BcVec *code) {
+
+ BcStatus status;
+ BcInstPtr ip;
+ BcFunc *func;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_LEFT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ status = bc_parse_expr(parse, code, BC_PARSE_EXPR_POSIX_REL);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_RIGHT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ status = bc_vec_pushByte(code, BC_INST_JUMP_ZERO);
+
+ if (status) return status;
+
+ func = bc_vec_item(&parse->program->funcs, parse->func);
+
+ if (!func) return BC_STATUS_EXEC_UNDEFINED_FUNC;
+
+ ip.idx = func->labels.len;
+ ip.func = 0;
+ ip.len = 0;
+
+ status = bc_parse_pushIndex(code, ip.idx);
+
+ if (status) return status;
+
+ status = bc_vec_push(&parse->exit_labels, &ip);
+
+ if (status) return status;
+
+ status = bc_vec_push(&func->labels, &ip.idx);
+
+ if (status) return status;
+
+ return bc_parse_startBody(parse, BC_PARSE_FLAG_IF);
+}
+
+BcStatus bc_parse_else(BcParse *parse, BcVec *code) {
+
+ BcStatus status;
+ BcInstPtr ip;
+ BcFunc *func;
+
+ if (!BC_PARSE_IF_END(parse)) return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ func = bc_vec_item(&parse->program->funcs, parse->func);
+
+ if (!func) return BC_STATUS_PARSE_BUG;
+
+ ip.idx = func->labels.len;
+ ip.func = 0;
+ ip.len = 0;
+
+ status = bc_vec_pushByte(code, BC_INST_JUMP);
+
+ if (status) return status;
+
+ status = bc_parse_pushIndex(code, ip.idx);
+
+ if (status) return status;
+
+ status = bc_parse_noElse(parse, code);
+
+ if (status) return status;
+
+ status = bc_vec_push(&parse->exit_labels, &ip);
+
+ if (status) return status;
+
+ status = bc_vec_push(&func->labels, &ip.idx);
+
+ if (status) return status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ return bc_parse_startBody(parse, BC_PARSE_FLAG_ELSE);
+}
+
+BcStatus bc_parse_while(BcParse *parse, BcVec *code) {
+
+ BcStatus status;
+ uint8_t flags;
+ BcFunc *func;
+ BcInstPtr ip;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_LEFT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ func = bc_vec_item(&parse->program->funcs, parse->func);
+
+ if (!func) return BC_STATUS_EXEC_UNDEFINED_FUNC;
+
+ ip.idx = func->labels.len;
+
+ status = bc_vec_push(&func->labels, &code->len);
+
+ if (status) return status;
+
+ status = bc_vec_push(&parse->cond_labels, &ip.idx);
+
+ if (status) return status;
+
+ ip.idx = func->labels.len;
+ ip.func = 1;
+ ip.len = 0;
+
+ status = bc_vec_push(&parse->exit_labels, &ip);
+
+ if (status) return status;
+
+ status = bc_vec_push(&func->labels, &ip.idx);
+
+ if (status) return status;
+
+ status = bc_parse_expr(parse, code, BC_PARSE_EXPR_POSIX_REL);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_RIGHT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ status = bc_vec_pushByte(code, BC_INST_JUMP_ZERO);
+
+ if (status) return status;
+
+ status = bc_parse_pushIndex(code, ip.idx);
+
+ if (status) return status;
+
+ flags = BC_PARSE_FLAG_LOOP | BC_PARSE_FLAG_LOOP_INNER;
+
+ return bc_parse_startBody(parse, flags);
+}
+
+BcStatus bc_parse_for(BcParse *parse, BcVec *code) {
+
+ BcStatus status;
+ BcFunc *func;
+ BcInstPtr ip;
+ size_t cond_idx, exit_idx, body_idx, update_idx;
+ uint8_t flags;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_LEFT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_SEMICOLON)
+ status = bc_parse_expr(parse, code, 0);
+ else
+ status = bc_posix_error(BC_STATUS_POSIX_MISSING_FOR_INIT,
+ parse->lex.file, parse->lex.line, NULL);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_SEMICOLON)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ func = bc_vec_item(&parse->program->funcs, parse->func);
+
+ if (!func) return BC_STATUS_PARSE_BUG;
+
+ cond_idx = func->labels.len;
+ update_idx = cond_idx + 1;
+ body_idx = update_idx + 1;
+ exit_idx = body_idx + 1;
+
+ status = bc_vec_push(&func->labels, &code->len);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_SEMICOLON)
+ status = bc_parse_expr(parse, code, BC_PARSE_EXPR_POSIX_REL);
+ else status = bc_posix_error(BC_STATUS_POSIX_MISSING_FOR_COND,
+ parse->lex.file, parse->lex.line, NULL);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_SEMICOLON)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ status = bc_vec_pushByte(code, BC_INST_JUMP_ZERO);
+
+ if (status) return status;
+
+ status = bc_parse_pushIndex(code, exit_idx);
+
+ if (status) return status;
+
+ status = bc_vec_pushByte(code, BC_INST_JUMP);
+
+ if (status) return status;
+
+ status = bc_parse_pushIndex(code, body_idx);
+
+ if (status) return status;
+
+ ip.idx = func->labels.len;
+
+ status = bc_vec_push(&parse->cond_labels, &update_idx);
+
+ if (status) return status;
+
+ status = bc_vec_push(&func->labels, &code->len);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_RIGHT_PAREN)
+ status = bc_parse_expr(parse, code, 0);
+ else
+ status = bc_posix_error(BC_STATUS_POSIX_MISSING_FOR_UPDATE,
+ parse->lex.file, parse->lex.line, NULL);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_RIGHT_PAREN) {
+ status = bc_parse_expr(parse, code, BC_PARSE_EXPR_POSIX_REL);
+ if (status) return status;
+ }
+
+ if (parse->token.type != BC_LEX_RIGHT_PAREN)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_vec_pushByte(code, BC_INST_JUMP);
+
+ if (status) return status;
+
+ status = bc_parse_pushIndex(code, cond_idx);
+
+ if (status) return status;
+
+ status = bc_vec_push(&func->labels, &code->len);
+
+ if (status) return status;
+
+ ip.idx = exit_idx;
+ ip.func = 1;
+ ip.len = 0;
+
+ status = bc_vec_push(&parse->exit_labels, &ip);
+
+ if (status) return status;
+
+ status = bc_vec_push(&func->labels, &ip.idx);
+
+ if (status) return status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ flags = BC_PARSE_FLAG_LOOP | BC_PARSE_FLAG_LOOP_INNER;
+
+ return bc_parse_startBody(parse, flags);
+}
+
+BcStatus bc_parse_loopExit(BcParse *parse, BcVec *code,
+ BcLexTokenType type)
+{
+ BcStatus status;
+ size_t idx;
+
+ if (!BC_PARSE_LOOP(parse))
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ if (type == BC_LEX_KEY_BREAK) {
+
+ size_t top;
+ BcInstPtr *ip;
+
+ top = parse->exit_labels.len - 1;
+ ip = bc_vec_item(&parse->exit_labels, top);
+
+ while (top < parse->exit_labels.len && ip && !ip->func) {
+ ip = bc_vec_item(&parse->exit_labels, top);
+ --top;
+ }
+
+ if (top >= parse->exit_labels.len || !ip) return BC_STATUS_PARSE_BUG;
+
+ idx = ip->idx;
+ }
+ else {
+
+ size_t *ptr;
+
+ ptr = bc_vec_top(&parse->cond_labels);
+
+ if (!ptr) return BC_STATUS_PARSE_BUG;
+
+ idx = *ptr;
+ }
+
+ status = bc_vec_pushByte(code, BC_INST_JUMP);
+
+ if (status) return status;
+
+ status = bc_parse_pushIndex(code, idx);
+
+ if (status) return status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_SEMICOLON &&
+ parse->token.type != BC_LEX_NEWLINE)
+ {
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+ }
+
+ return bc_lex_next(&parse->lex, &parse->token);
+}
+
+BcStatus bc_parse_func(BcParse *parse) {
+
+ BcLexTokenType type;
+ BcStatus status;
+ BcFunc *fptr;
+ bool comma;
+ uint8_t flags;
+ char *name;
+ bool var;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ name = parse->token.string;
+
+ if (parse->token.type != BC_LEX_NAME) {
+ status = BC_STATUS_PARSE_INVALID_FUNC;
+ goto err;
+ }
+
+ if (parse->program->funcs.len != parse->program->func_map.vec.len) {
+ status = BC_STATUS_PARSE_MISMATCH_NUM_FUNCS;
+ goto err;
+ }
+
+ status = bc_program_func_add(parse->program, name, &parse->func);
+
+ if (status) goto err;
+
+ if (!parse->func) return BC_STATUS_PARSE_BUG;
+
+ fptr = bc_vec_item(&parse->program->funcs, parse->func);
+
+ if (!fptr) return BC_STATUS_EXEC_UNDEFINED_FUNC;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_LEFT_PAREN)
+ return BC_STATUS_PARSE_INVALID_FUNC;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ comma = false;
+
+ type = parse->token.type;
+ name = parse->token.string;
+
+ while (!status && type != BC_LEX_RIGHT_PAREN) {
+
+ if (type != BC_LEX_NAME) {
+ status = BC_STATUS_PARSE_INVALID_FUNC;
+ goto err;
+ }
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) goto err;
+
+ if (parse->token.type == BC_LEX_LEFT_BRACKET) {
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) goto err;
+
+ if (parse->token.type != BC_LEX_RIGHT_BRACKET)
+ return BC_STATUS_PARSE_INVALID_FUNC;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) goto err;
+
+ var = false;
+ }
+ else {
+ var = true;
+ }
+
+ if (parse->token.type == BC_LEX_COMMA) {
+
+ comma = true;
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) goto err;
+ }
+ else comma = false;
+
+ status = bc_func_insertParam(fptr, name, var);
+
+ if (status) goto err;
+
+ type = parse->token.type;
+ name = parse->token.string;
+ }
+
+ if (comma) return BC_STATUS_PARSE_INVALID_FUNC;
+
+ flags = BC_PARSE_FLAG_FUNC | BC_PARSE_FLAG_FUNC_INNER | BC_PARSE_FLAG_BODY;
+
+ status = bc_parse_startBody(parse, flags);
+
+ if (status) return status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ if (parse->token.type != BC_LEX_LEFT_BRACE)
+ return bc_posix_error(BC_STATUS_POSIX_FUNC_HEADER_LEFT_BRACE,
+ parse->lex.file, parse->lex.line, NULL);
+
+ return status;
+
+err:
+
+ free(name);
+
+ return status;
+}
+
+BcStatus bc_parse_auto(BcParse *parse) {
+
+ BcLexTokenType type;
+ BcStatus status;
+ bool comma;
+ char *name;
+ bool var;
+ bool one;
+ BcFunc *func;
+
+ if (!parse->auto_part) return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ parse->auto_part = false;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ comma = false;
+ one = false;
+
+ func = bc_vec_item(&parse->program->funcs, parse->func);
+
+ if (!func) return BC_STATUS_EXEC_UNDEFINED_FUNC;
+
+ type = parse->token.type;
+
+ while (!status && type == BC_LEX_NAME) {
+
+ name = parse->token.string;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ one = true;
+
+ if (parse->token.type == BC_LEX_LEFT_BRACKET) {
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) goto err;
+
+ if (parse->token.type != BC_LEX_RIGHT_BRACKET)
+ return BC_STATUS_PARSE_INVALID_FUNC;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) goto err;
+
+ var = false;
+ }
+ else var = true;
+
+ if (parse->token.type == BC_LEX_COMMA) {
+
+ comma = true;
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) goto err;
+ }
+ else comma = false;
+
+ status = bc_func_insertAuto(func, name, var);
+
+ if (status) goto err;
+
+ type = parse->token.type;
+ }
+
+ if (status) return status;
+
+ if (comma) return BC_STATUS_PARSE_INVALID_FUNC;
+
+ if (!one) return BC_STATUS_PARSE_NO_AUTO;
+
+ if (type != BC_LEX_NEWLINE && type != BC_LEX_SEMICOLON)
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ return bc_lex_next(&parse->lex, &parse->token);
+
+err:
+
+ free(name);
+
+ return status;
+}
+
+BcStatus bc_parse_body(BcParse *parse, BcVec *code, bool brace) {
+
+ BcStatus status;
+ uint8_t *flag_ptr;
+ uint8_t flags;
+
+ if (parse->flags.len < 2) return BC_STATUS_PARSE_BUG;
+
+ flag_ptr = bc_vec_top(&parse->flags);
+
+ if (!flag_ptr) return BC_STATUS_PARSE_BUG;
+
+ *flag_ptr &= ~(BC_PARSE_FLAG_BODY);
+
+ flags = *flag_ptr;
+
+ if (flags & BC_PARSE_FLAG_FUNC_INNER) {
+ if (!brace) return BC_STATUS_PARSE_INVALID_TOKEN;
+ parse->auto_part = true;
+ status = bc_lex_next(&parse->lex, &parse->token);
+ }
+ else if (flags) {
+
+ status = bc_parse_stmt(parse, code);
+
+ if (!brace) {
+
+ if (status) return status;
+
+ status = bc_parse_endBody(parse, code, false);
+ }
+ }
+ else status = BC_STATUS_PARSE_BUG;
+
+ return status;
+}
+
+BcStatus bc_parse_semicolonList(BcParse *parse, BcVec *code) {
+
+ BcStatus status;
+
+ status = BC_STATUS_SUCCESS;
+
+ switch (parse->token.type) {
+
+ case BC_LEX_OP_INC:
+ case BC_LEX_OP_DEC:
+ case BC_LEX_OP_MINUS:
+ case BC_LEX_OP_BOOL_NOT:
+ case BC_LEX_LEFT_PAREN:
+ case BC_LEX_STRING:
+ case BC_LEX_NAME:
+ case BC_LEX_NUMBER:
+ case BC_LEX_KEY_BREAK:
+ case BC_LEX_KEY_CONTINUE:
+ case BC_LEX_KEY_FOR:
+ case BC_LEX_KEY_HALT:
+ case BC_LEX_KEY_IBASE:
+ case BC_LEX_KEY_IF:
+ case BC_LEX_KEY_LAST:
+ case BC_LEX_KEY_LENGTH:
+ case BC_LEX_KEY_LIMITS:
+ case BC_LEX_KEY_OBASE:
+ case BC_LEX_KEY_PRINT:
+ case BC_LEX_KEY_QUIT:
+ case BC_LEX_KEY_READ:
+ case BC_LEX_KEY_RETURN:
+ case BC_LEX_KEY_SCALE:
+ case BC_LEX_KEY_SQRT:
+ case BC_LEX_KEY_WHILE:
+ {
+ status = bc_parse_stmt(parse, code);
+ break;
+ }
+
+ case BC_LEX_NEWLINE:
+ {
+ status = bc_lex_next(&parse->lex, &parse->token);
+ break;
+ }
+
+ case BC_LEX_SEMICOLON:
+ {
+ status = bc_parse_semicolonListEnd(parse, code);
+ break;
+ }
+
+ case BC_LEX_EOF:
+ {
+ if (parse->flags.len > 0) status = BC_STATUS_PARSE_EOF;
+ break;
+ }
+
+ default:
+ {
+ status = BC_STATUS_PARSE_INVALID_TOKEN;
+ break;
+ }
+ }
+
+ return status;
+}
+
+BcStatus bc_parse_semicolonListEnd(BcParse *parse, BcVec *code) {
+
+ BcStatus status;
+
+ if (parse->token.type == BC_LEX_SEMICOLON) {
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ status = bc_parse_semicolonList(parse, code);
+ }
+ else if (parse->token.type == BC_LEX_NEWLINE)
+ status = bc_lex_next(&parse->lex, &parse->token);
+ else if (parse->token.type == BC_LEX_EOF)
+ status = BC_STATUS_SUCCESS;
+ else
+ status = BC_STATUS_PARSE_INVALID_TOKEN;
+
+ return status;
+}
+
+BcStatus bc_parse_stmt(BcParse *parse, BcVec *code) {
+
+ BcStatus status;
+
+ switch (parse->token.type) {
+
+ case BC_LEX_NEWLINE:
+ {
+ status = bc_lex_next(&parse->lex, &parse->token);
+ return status;
+ }
+
+ case BC_LEX_KEY_ELSE:
+ {
+ parse->auto_part = false;
+ break;
+ }
+
+ case BC_LEX_LEFT_BRACE:
+ {
+ ++parse->num_braces;
+
+ if (!BC_PARSE_BODY(parse)) return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ return bc_parse_body(parse, code, true);
+ }
+
+ case BC_LEX_KEY_AUTO:
+ {
+ return bc_parse_auto(parse);
+ }
+
+ default:
+ {
+ parse->auto_part = false;
+
+ if (BC_PARSE_IF_END(parse)) return bc_parse_noElse(parse, code);
+ else if (BC_PARSE_BODY(parse)) return bc_parse_body(parse, code, false);
+
+ break;
+ }
+ }
+
+ switch (parse->token.type) {
+
+ case BC_LEX_OP_INC:
+ case BC_LEX_OP_DEC:
+ case BC_LEX_OP_MINUS:
+ case BC_LEX_OP_BOOL_NOT:
+ case BC_LEX_LEFT_PAREN:
+ case BC_LEX_NAME:
+ case BC_LEX_NUMBER:
+ case BC_LEX_KEY_IBASE:
+ case BC_LEX_KEY_LAST:
+ case BC_LEX_KEY_LENGTH:
+ case BC_LEX_KEY_OBASE:
+ case BC_LEX_KEY_READ:
+ case BC_LEX_KEY_SCALE:
+ case BC_LEX_KEY_SQRT:
+ {
+ status = bc_parse_expr(parse, code, BC_PARSE_EXPR_PRINT);
+
+ if (status) break;
+
+ status = bc_parse_semicolonListEnd(parse, code);
+
+ break;
+ }
+
+ case BC_LEX_KEY_ELSE:
+ {
+ status = bc_parse_else(parse, code);
+ break;
+ }
+
+ case BC_LEX_RIGHT_BRACE:
+ {
+ status = bc_parse_endBody(parse, code, true);
+ break;
+ }
+
+ case BC_LEX_STRING:
+ {
+ status = bc_parse_string(parse, code);
+ break;
+ }
+
+ case BC_LEX_KEY_BREAK:
+ case BC_LEX_KEY_CONTINUE:
+ {
+ status = bc_parse_loopExit(parse, code, parse->token.type);
+ break;
+ }
+
+ case BC_LEX_KEY_FOR:
+ {
+ status = bc_parse_for(parse, code);
+ break;
+ }
+
+ case BC_LEX_KEY_HALT:
+ {
+ status = bc_vec_pushByte(code, BC_INST_HALT);
+
+ if (status) return status;
+
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status) return status;
+
+ status = bc_parse_semicolonListEnd(parse, code);
+
+ break;
+ }
+
+ case BC_LEX_KEY_IF:
+ {
+ status = bc_parse_if(parse, code);
+ break;
+ }
+
+ case BC_LEX_KEY_LIMITS:
+ {
+ status = bc_lex_next(&parse->lex, &parse->token);
+
+ if (status && status != BC_STATUS_LEX_EOF) return status;
+
+ status = bc_parse_semicolonListEnd(parse, code);
+
+ if (status && status != BC_STATUS_LEX_EOF) return status;
+
+ status = BC_STATUS_PARSE_LIMITS;
+
+ break;
+ }
+
+ case BC_LEX_KEY_PRINT:
+ {
+ status = bc_parse_print(parse, code);
+ break;
+ }
+
+ case BC_LEX_KEY_QUIT:
+ {
+ // Quit is a compile-time command,
+ // so we send an exit command. We
+ // don't exit directly, so the vm
+ // can clean up.
+ status = BC_STATUS_PARSE_QUIT;
+ break;
+ }
+
+ case BC_LEX_KEY_RETURN:
+ {
+ status = bc_parse_return(parse, code);
+
+ if (status) return status;
+
+ status = bc_parse_semicolonListEnd(parse, code);
+
+ break;
+ }
+
+ case BC_LEX_KEY_WHILE:
+ {
+ status = bc_parse_while(parse, code);
+ break;
+ }
+
+ default:
+ {
+ status = BC_STATUS_PARSE_INVALID_TOKEN;
+ break;
+ }
+ }
+
+ return status;
+}
+
+BcStatus bc_parse_init(BcParse *parse, BcProgram *program) {
+
+ BcStatus status;
+
+ if (parse == NULL || program == NULL) return BC_STATUS_INVALID_PARAM;
+
+ status = bc_vec_init(&parse->flags, sizeof(uint8_t), NULL);
+
+ if (status != BC_STATUS_SUCCESS) return status;
+
+ status = bc_vec_init(&parse->exit_labels, sizeof(BcInstPtr), NULL);
+
+ if (status) goto exit_label_err;
+
+ status = bc_vec_init(&parse->cond_labels, sizeof(size_t), NULL);
+
+ if (status) goto cond_label_err;
+
+ uint8_t flags = 0;
+
+ status = bc_vec_push(&parse->flags, &flags);
+
+ if (status != BC_STATUS_SUCCESS) goto push_err;
+
+ status = bc_vec_init(&parse->ops, sizeof(BcLexTokenType), NULL);
+
+ if (status) goto push_err;
+
+ parse->program = program;
+ parse->func = 0;
+ parse->num_braces = 0;
+ parse->auto_part = false;
+
+ return status;
+
+push_err:
+
+ bc_vec_free(&parse->cond_labels);
+
+cond_label_err:
+
+ bc_vec_free(&parse->exit_labels);
+
+exit_label_err:
+
+ bc_vec_free(&parse->flags);
+
+ return status;
+}
+
+BcStatus bc_parse_file(BcParse *parse, const char *file) {
+
+ if (parse == NULL || file == NULL) return BC_STATUS_INVALID_PARAM;
+
+ return bc_lex_init(&parse->lex, file);
+}
+
+BcStatus bc_parse_text(BcParse *parse, const char *text) {
+
+ BcStatus status;
+
+ if (parse == NULL || text == NULL) return BC_STATUS_INVALID_PARAM;
+
+ status = bc_lex_text(&parse->lex, text);
+
+ if (status) return status;
+
+ return bc_lex_next(&parse->lex, &parse->token);
+}
+
+BcStatus bc_parse_parse(BcParse *parse) {
+
+ BcStatus status;
+
+ if (parse == NULL) return BC_STATUS_INVALID_PARAM;
+
+ switch (parse->token.type) {
+
+ case BC_LEX_NEWLINE:
+ {
+ status = bc_lex_next(&parse->lex, &parse->token);
+ break;
+ }
+
+ case BC_LEX_KEY_DEFINE:
+ {
+ if (!BC_PARSE_CAN_EXEC(parse))
+ return BC_STATUS_PARSE_INVALID_TOKEN;
+
+ status = bc_parse_func(parse);
+
+ break;
+ }
+
+ case BC_LEX_EOF:
+ {
+ status = BC_STATUS_PARSE_EOF;
+ break;
+ }
+
+ default:
+ {
+ BcFunc *func;
+
+ func = bc_vec_item(&parse->program->funcs, parse->func);
+
+ if (!func) return BC_STATUS_EXEC_UNDEFINED_FUNC;
+
+ status = bc_parse_stmt(parse, &func->code);
+
+ break;
+ }
+ }
+
+ return status;
+}
+
+void bc_parse_free(BcParse *parse) {
+
+ if (!parse) {
+ return;
+ }
+
+ bc_vec_free(&parse->flags);
+ bc_vec_free(&parse->exit_labels);
+ bc_vec_free(&parse->cond_labels);
+ bc_vec_free(&parse->ops);
+
+ switch (parse->token.type) {
+
+ case BC_LEX_STRING:
+ case BC_LEX_NAME:
+ case BC_LEX_NUMBER:
+ {
+ if (parse->token.string) {
+ free(parse->token.string);
+ }
+
+ break;
+ }
+
+ default:
+ {
+ // We don't have have to free anything.
+ break;
+ }
+ }
+}
+
+BcStatus bc_parse_expr(BcParse *parse, BcVec *code, uint8_t flags) {
+
+ BcStatus status;
+ uint32_t nexprs, nparens, ops_start, nrelops;
+ bool paren_first, paren_expr, rparen, done, get_token, assign;
+ BcExprType prev;
+ BcLexTokenType type, top;
+ BcLexTokenType *ptr;
+
+ status = BC_STATUS_SUCCESS;
+
+ ops_start = parse->ops.len;
+
+ prev = BC_EXPR_PRINT;
+
+ paren_first = parse->token.type == BC_LEX_LEFT_PAREN;
+
+ nexprs = 0;
+ nparens = 0;
+ paren_expr = false;
+ rparen = false;
+ done = false;
+ get_token = false;
+ assign = false;
+ nrelops = 0;
+
+ type = parse->token.type;
+
+ while (!status && !done && bc_parse_token_exprs[type]) {
+
+ switch (type) {
+
+ case BC_LEX_OP_INC:
+ case BC_LEX_OP_DEC:
+ {
+ status = bc_parse_incdec(parse, code, &prev, &nexprs, flags);
+ rparen = false;
+ get_token = false;
+ break;
+ }
+
+ case BC_LEX_OP_MINUS:
+ {
+ status = bc_parse_minus(parse, code, &parse->ops, &prev,
+ rparen, &nexprs);
+ rparen = false;
+ get_token = false;
+ break;
+ }
+
+ case BC_LEX_OP_ASSIGN_POWER:
+ case BC_LEX_OP_ASSIGN_MULTIPLY:
+ case BC_LEX_OP_ASSIGN_DIVIDE:
+ case BC_LEX_OP_ASSIGN_MODULUS:
+ case BC_LEX_OP_ASSIGN_PLUS:
+ case BC_LEX_OP_ASSIGN_MINUS:
+ case BC_LEX_OP_ASSIGN:
+ if (prev != BC_EXPR_VAR && prev != BC_EXPR_ARRAY_ELEM &&
+ prev != BC_EXPR_SCALE && prev != BC_EXPR_IBASE &&
+ prev != BC_EXPR_OBASE && prev != BC_EXPR_LAST)
+ {
+ status = BC_STATUS_PARSE_INVALID_ASSIGN;
+ break;
+ }
+ // Fallthrough.
+ case BC_LEX_OP_POWER:
+ case BC_LEX_OP_MULTIPLY:
+ case BC_LEX_OP_DIVIDE:
+ case BC_LEX_OP_MODULUS:
+ case BC_LEX_OP_PLUS:
+ case BC_LEX_OP_REL_EQUAL:
+ case BC_LEX_OP_REL_LESS_EQ:
+ case BC_LEX_OP_REL_GREATER_EQ:
+ case BC_LEX_OP_REL_NOT_EQ:
+ case BC_LEX_OP_REL_LESS:
+ case BC_LEX_OP_REL_GREATER:
+ case BC_LEX_OP_BOOL_NOT:
+ case BC_LEX_OP_BOOL_OR:
+ case BC_LEX_OP_BOOL_AND:
+ {
+ if (type >= BC_LEX_OP_REL_EQUAL && type <= BC_LEX_OP_REL_GREATER)
+ nrelops += 1;
+
+ prev = BC_PARSE_TOKEN_TO_EXPR(type);
+ status = bc_parse_operator(parse, code, &parse->ops,
+ type, &nexprs, true);
+ rparen = false;
+ get_token = false;
+
+ break;
+ }
+
+ case BC_LEX_LEFT_PAREN:
+ {
+ ++nparens;
+ paren_expr = false;
+ rparen = false;
+ get_token = true;
+ status = bc_vec_push(&parse->ops, &type);
+ break;
+ }
+
+ case BC_LEX_RIGHT_PAREN:
+ {
+ if (nparens == 0) {
+ status = BC_STATUS_SUCCESS;
+ done = true;
+ get_token = false;
+ break;
+ }
+ else if (!paren_expr) {
+ status = BC_STATUS_PARSE_INVALID_EXPR;
+ goto err;
+ }
+
+ --nparens;
+ paren_expr = true;
+ rparen = true;
+ get_token = false;
+
+ status = bc_parse_rightParen(parse, code, &parse->ops, &nexprs);
+
+ break;
+ }
+
+ case BC_LEX_NAME:
+ {
+ paren_expr = true;
+ rparen = false;
+ get_token = false;
+ status = bc_parse_expr_name(parse, code, &prev,
+ flags & ~(BC_PARSE_EXPR_NO_CALL));
+ ++nexprs;
+ break;
+ }
+
+ case BC_LEX_NUMBER:
+ {
+ size_t idx;
+
+ idx = parse->program->constants.len;
+
+ status = bc_vec_push(&parse->program->constants, &parse->token.string);
+
+ if (status) goto err;
+
+ status = bc_vec_pushByte(code, BC_INST_PUSH_NUM);
+
+ if (status) return status;
+
+ status = bc_parse_pushIndex(code, idx);
+
+ if (status) return status;
+
+ paren_expr = true;
+ rparen = false;
+ get_token = true;
+ ++nexprs;
+ prev = BC_EXPR_NUMBER;
+
+ break;
+ }
+
+ case BC_LEX_KEY_IBASE:
+ {
+ status = bc_vec_pushByte(code, BC_INST_PUSH_IBASE);
+
+ paren_expr = true;
+ rparen = false;
+ get_token = true;
+ ++nexprs;
+ prev = BC_EXPR_IBASE;
+
+ break;
+ }
+
+ case BC_LEX_KEY_LENGTH:
+ case BC_LEX_KEY_SQRT:
+ {
+ status = bc_parse_builtin(parse, code, type, flags);
+ paren_expr = true;
+ rparen = false;
+ get_token = false;
+ ++nexprs;
+ prev = type == BC_LEX_KEY_LENGTH ? BC_EXPR_LENGTH : BC_EXPR_SQRT;
+ break;
+ }
+
+ case BC_LEX_KEY_OBASE:
+ {
+ status = bc_vec_pushByte(code, BC_INST_PUSH_OBASE);
+
+ paren_expr = true;
+ rparen = false;
+ get_token = true;
+ ++nexprs;
+ prev = BC_EXPR_OBASE;
+
+ break;
+ }
+
+ case BC_LEX_KEY_READ:
+ {
+ if (flags & BC_PARSE_EXPR_NO_READ)
+ status = BC_STATUS_EXEC_RECURSIVE_READ;
+ else status = bc_parse_read(parse, code);
+
+ paren_expr = true;
+ rparen = false;
+ get_token = false;
+ ++nexprs;
+ prev = BC_EXPR_READ;
+
+ break;
+ }
+
+ case BC_LEX_KEY_SCALE:
+ {
+ status = bc_parse_scale(parse, code, &prev, flags);
+ paren_expr = true;
+ rparen = false;
+ get_token = false;
+ ++nexprs;
+ prev = BC_EXPR_SCALE;
+ break;
+ }
+
+ default:
+ {
+ status = BC_STATUS_PARSE_INVALID_TOKEN;
+ break;
+ }
+ }
+
+ if (status && status != BC_STATUS_LEX_EOF) goto err;
+
+ if (get_token) status = bc_lex_next(&parse->lex, &parse->token);
+
+ type = parse->token.type;
+ }
+
+ if (status && status != BC_STATUS_LEX_EOF) goto err;
+
+ status = BC_STATUS_SUCCESS;
+
+ while (!status && parse->ops.len > ops_start) {
+
+ ptr = bc_vec_top(&parse->ops);
+ top = *ptr;
+
+ assign = top >= BC_LEX_OP_ASSIGN_POWER && top <= BC_LEX_OP_ASSIGN;
+
+ if (top == BC_LEX_LEFT_PAREN || top == BC_LEX_RIGHT_PAREN) {
+ status = BC_STATUS_PARSE_INVALID_EXPR;
+ goto err;
+ }
+
+ status = bc_vec_pushByte(code, bc_parse_insts[top - BC_LEX_OP_NEGATE]);
+
+ if (status) goto err;
+
+ nexprs -= top != BC_LEX_OP_BOOL_NOT && top != BC_LEX_OP_NEGATE ? 1 : 0;
+
+ status = bc_vec_pop(&parse->ops);
+
+ if (status) goto err;
+ }
+
+ if (nexprs != 1) {
+ status = BC_STATUS_PARSE_INVALID_EXPR;
+ goto err;
+ }
+
+ if (!(flags & BC_PARSE_EXPR_POSIX_REL) && nrelops &&
+ (status = bc_posix_error(BC_STATUS_POSIX_REL_OUTSIDE,
+ parse->lex.file, parse->lex.line, NULL)))
+ {
+ goto err;
+ }
+ else if (nrelops > 1 &&
+ (status = bc_posix_error(BC_STATUS_POSIX_REL_OUTSIDE,
+ parse->lex.file, parse->lex.line, NULL)))
+ {
+ goto err;
+ }
+
+ if (flags & BC_PARSE_EXPR_PRINT) {
+ if (paren_first || !assign) status = bc_vec_pushByte(code, BC_INST_PRINT);
+ else status = bc_vec_pushByte(code, BC_INST_POP);
+ }
+
+ return type == BC_LEX_EOF ? BC_STATUS_LEX_EOF : status;
+
+err:
+
+ if (parse->token.string) free(parse->token.string);
+
+ return status;
+}
+
+BcStatus bc_program_searchVec(const BcVec *vec, const BcResult *result,
+ BcNum **ret, uint8_t flags)
+{
+ BcStatus status;
+ BcAuto *a;
+ size_t i;
+
+ for (i = 0; i < vec->len; ++i) {
+
+ a = bc_vec_item(vec, i);
+
+ if (!a) return BC_STATUS_EXEC_UNDEFINED_VAR;
+
+ if (!strcmp(a->name, result->data.id.name)) {
+
+ uint8_t cond;
+
+ cond = flags & BC_PROGRAM_SEARCH_VAR;
+
+ if (!a->var != !cond)
+ return BC_STATUS_EXEC_INVALID_TYPE;
+
+ if (cond) *ret = &a->data.num;
+ else if (flags & BC_PROGRAM_SEARCH_ARRAY_ONLY)
+ *ret = (BcNum*) &a->data.array;
+ else {
+
+ status = bc_array_expand(&a->data.array, result->data.id.idx + 1);
+
+ if (status) return status;
+
+ *ret = bc_vec_item(&a->data.array, result->data.id.idx);
+ }
+
+ return BC_STATUS_SUCCESS;
+ }
+ }
+
+ return BC_STATUS_EXEC_UNDEFINED_VAR;
+}
+
+BcStatus bc_program_search(BcProgram *p, BcResult *result,
+ BcNum **ret, uint8_t flags)
+{
+ BcStatus status;
+ BcFunc *func;
+ BcInstPtr *ip;
+ BcEntry entry;
+ BcVec *vec;
+ BcVecO *veco;
+ size_t idx;
+ BcEntry *entry_ptr;
+
+ // We use this as either a number or an array, since
+ // a BcAuto has a union inside that has both.
+ BcAuto a;
+
+ ip = bc_vec_top(&p->stack);
+
+ if (!ip) return BC_STATUS_EXEC_INVALID_STACK;
+
+ if (ip->func == BC_PROGRAM_READ_FUNC) {
+ ip = bc_vec_item_rev(&p->stack, 1);
+ if (!ip) return BC_STATUS_EXEC_INVALID_STACK;
+ }
+
+ if (ip->func != BC_PROGRAM_MAIN_FUNC) {
+
+ func = bc_vec_item(&p->funcs, ip->func);
+
+ if (!func) return BC_STATUS_EXEC_INVALID_STACK;
+
+ status = bc_program_searchVec(&func->params, result, ret, flags);
+
+ if (status != BC_STATUS_EXEC_UNDEFINED_VAR) return status;
+
+ status = bc_program_searchVec(&func->autos, result, ret, flags);
+
+ if (status != BC_STATUS_EXEC_UNDEFINED_VAR) return status;
+ }
+
+ vec = (flags & BC_PROGRAM_SEARCH_VAR) ? &p->vars : &p->arrays;
+ veco = (flags & BC_PROGRAM_SEARCH_VAR) ? &p->var_map : &p->array_map;
+
+ entry.name = result->data.id.name;
+ entry.idx = vec->len;
+
+ status = bc_veco_insert(veco, &entry, &idx);
+
+ if (status != BC_STATUS_VECO_ITEM_EXISTS) {
+
+ size_t len;
+
+ if (status) return status;
+
+ len = strlen(entry.name) + 1;
+
+ result->data.id.name = malloc(len);
+
+ if (!result->data.id.name) return BC_STATUS_MALLOC_FAIL;
+
+ strcpy(result->data.id.name, entry.name);
+
+ status = bc_auto_init(&a, NULL, flags & BC_PROGRAM_SEARCH_VAR);
+
+ if (status) return status;
+
+ status = bc_vec_push(vec, &a.data);
+
+ if (status) return status;
+ }
+
+ entry_ptr = bc_veco_item(veco, idx);
+
+ if (!entry_ptr) return BC_STATUS_VECO_OUT_OF_BOUNDS;
+
+ if (flags & BC_PROGRAM_SEARCH_VAR) {
+ *ret = bc_vec_item(vec, entry_ptr->idx);
+ if (!(*ret)) return BC_STATUS_EXEC_UNDEFINED_VAR;
+ }
+ else {
+
+ BcArray *aptr;
+
+ aptr = bc_vec_item(vec, entry_ptr->idx);
+
+ if (!aptr) return BC_STATUS_EXEC_UNDEFINED_ARRAY;
+
+ if (flags & BC_PROGRAM_SEARCH_ARRAY_ONLY) {
+ *ret = (BcNum*) aptr;
+ return BC_STATUS_SUCCESS;
+ }
+
+ status = bc_array_expand(aptr, result->data.id.idx + 1);
+
+ if (status) return status;
+
+ *ret = bc_vec_item(aptr, result->data.id.idx);
+ }
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_program_num(BcProgram *p, BcResult *result,
+ BcNum** num, bool ibase)
+{
+
+ BcStatus status;
+
+ status = BC_STATUS_SUCCESS;
+
+ switch (result->type) {
+
+ case BC_RESULT_INTERMEDIATE:
+ case BC_RESULT_SCALE:
+ {
+ *num = &result->data.num;
+ break;
+ }
+
+ case BC_RESULT_CONSTANT:
+ {
+ char** s;
+ size_t idx;
+ size_t len;
+ size_t base;
+
+ idx = result->data.id.idx;
+
+ s = bc_vec_item(&p->constants, idx);
+
+ if (!s) return BC_STATUS_EXEC_INVALID_CONSTANT;
+
+ len = strlen(*s);
+
+ status = bc_num_init(&result->data.num, len);
+
+ if (status) return status;
+
+ base = ibase && len == 1 ? 16 : p->ibase_t;
+
+ status = bc_num_parse(&result->data.num, *s, &p->ibase, base);
+
+ if (status) return status;
+
+ *num = &result->data.num;
+
+ result->type = BC_RESULT_INTERMEDIATE;
+
+ break;
+ }
+
+ case BC_RESULT_VAR:
+ case BC_RESULT_ARRAY:
+ {
+ uint8_t flags;
+
+ flags = result->type == BC_RESULT_VAR ? BC_PROGRAM_SEARCH_VAR : 0;
+
+ status = bc_program_search(p, result, num, flags);
+
+ break;
+ }
+
+ case BC_RESULT_LAST:
+ {
+ *num = &p->last;
+ break;
+ }
+
+ case BC_RESULT_IBASE:
+ {
+ *num = &p->ibase;
+ break;
+ }
+
+ case BC_RESULT_OBASE:
+ {
+ *num = &p->obase;
+ break;
+ }
+
+ case BC_RESULT_ONE:
+ {
+ *num = &p->one;
+ break;
+ }
+
+ default:
+ {
+ status = BC_STATUS_EXEC_INVALID_EXPR;
+ break;
+ }
+ }
+
+ return status;
+}
+
+BcStatus bc_program_binaryOpPrep(BcProgram *p, BcResult **left,
+ BcNum **lval, BcResult **right,
+ BcNum **rval)
+{
+ BcStatus status;
+ BcResult *l;
+ BcResult *r;
+
+ if (!BC_PROGRAM_CHECK_EXPR_STACK(p, 2)) return BC_STATUS_EXEC_INVALID_EXPR;
+
+ r = bc_vec_item_rev(&p->expr_stack, 0);
+ l = bc_vec_item_rev(&p->expr_stack, 1);
+
+ if (!r || !l) return BC_STATUS_EXEC_INVALID_EXPR;
+
+ status = bc_program_num(p, l, lval, false);
+
+ if (status) return status;
+
+ status = bc_program_num(p, r, rval, l->type == BC_RESULT_IBASE);
+
+ if (status) return status;
+
+ *left = l;
+ *right = r;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_program_binaryOpRetire(BcProgram *p, BcResult *result,
+ BcResultType type)
+{
+ BcStatus status;
+
+ result->type = type;
+
+ status = bc_vec_pop(&p->expr_stack);
+
+ if (status) return status;
+
+ status = bc_vec_pop(&p->expr_stack);
+
+ if (status) return status;
+
+ return bc_vec_push(&p->expr_stack, result);
+}
+
+BcStatus bc_program_unaryOpPrep(BcProgram *p, BcResult **result,
+ BcNum **val)
+{
+ BcStatus status;
+ BcResult *r;
+
+ if (!BC_PROGRAM_CHECK_EXPR_STACK(p, 1)) return BC_STATUS_EXEC_INVALID_EXPR;
+
+ r = bc_vec_item_rev(&p->expr_stack, 0);
+
+ if (!r) return BC_STATUS_EXEC_INVALID_EXPR;
+
+ status = bc_program_num(p, r, val, false);
+
+ if (status) return status;
+
+ *result = r;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_program_unaryOpRetire(BcProgram *p, BcResult *result,
+ BcResultType type)
+{
+ BcStatus status;
+
+ result->type = type;
+
+ status = bc_vec_pop(&p->expr_stack);
+
+ if (status) return status;
+
+ return bc_vec_push(&p->expr_stack, result);
+}
+
+BcStatus bc_program_op(BcProgram *p, uint8_t inst) {
+
+ BcStatus status;
+ BcResult *operand1;
+ BcResult *operand2;
+ BcResult result;
+ BcNum *num1;
+ BcNum *num2;
+
+ status = bc_program_binaryOpPrep(p, &operand1, &num1, &operand2, &num2);
+
+ if (status) return status;
+
+ status = bc_num_init(&result.data.num, BC_NUM_DEF_SIZE);
+
+ if (status) return status;
+
+ if (inst != BC_INST_OP_POWER) {
+
+ BcNumBinaryFunc op;
+
+ op = bc_program_math_ops[inst - BC_INST_OP_MODULUS];
+
+ status = op(num1, num2, &result.data.num, p->scale);
+ }
+ else status = bc_num_pow(num1, num2, &result.data.num, p->scale);
+
+ if (status) goto err;
+
+ status = bc_program_binaryOpRetire(p, &result, BC_RESULT_INTERMEDIATE);
+
+ if (status) goto err;
+
+ return status;
+
+err:
+
+ bc_num_free(&result.data.num);
+
+ return status;
+}
+
+BcStatus bc_program_read(BcProgram *p) {
+
+ BcStatus status;
+ BcParse parse;
+ char *buffer;
+ size_t size;
+ BcFunc *func;
+ BcInstPtr ip;
+
+ func = bc_vec_item(&p->funcs, BC_PROGRAM_READ_FUNC);
+
+ if (!func) return BC_STATUS_EXEC_UNDEFINED_FUNC;
+
+ func->code.len = 0;
+
+ buffer = malloc(BC_PROGRAM_BUF_SIZE + 1);
+
+ if (!buffer) return BC_STATUS_MALLOC_FAIL;
+
+ size = BC_PROGRAM_BUF_SIZE;
+
+ status = bc_io_getline(&buffer, &size);
+
+ if (status) goto io_err;
+
+ status = bc_parse_init(&parse, p);
+
+ if (status) goto io_err;
+
+ status = bc_parse_file(&parse, "<stdin>");
+
+ if (status) goto exec_err;
+
+ status = bc_parse_text(&parse, buffer);
+
+ if (status) goto exec_err;
+
+ status = bc_parse_expr(&parse, &func->code, BC_PARSE_EXPR_NO_READ);
+
+ if (status != BC_STATUS_LEX_EOF &&
+ status != BC_STATUS_PARSE_EOF &&
+ parse.token.type != BC_LEX_NEWLINE)
+ {
+ status = status ? status : BC_STATUS_EXEC_INVALID_READ_EXPR;
+ goto exec_err;
+ }
+
+ ip.func = BC_PROGRAM_READ_FUNC;
+ ip.idx = 0;
+ ip.len = p->expr_stack.len;
+
+ status = bc_vec_push(&p->stack, &ip);
+
+ if (status) goto exec_err;
+
+ status = bc_program_exec(p);
+
+ if (status) goto exec_err;
+
+ status = bc_vec_pop(&p->stack);
+
+exec_err:
+
+ bc_parse_free(&parse);
+
+io_err:
+
+ free(buffer);
+
+ return status;
+}
+
+size_t bc_program_index(uint8_t *code, size_t *start) {
+
+ uint8_t bytes;
+ uint8_t byte;
+ size_t result;
+
+ bytes = code[(*start)++];
+ byte = 1;
+
+ result = 0;
+
+ for (uint8_t i = 0; byte && i < bytes; ++i) {
+ byte = code[(*start)++];
+ result |= (((size_t) byte) << (i * 8));
+ }
+
+ return result;
+}
+
+char* bc_program_name(uint8_t *code, size_t *start) {
+
+ char byte;
+ char *s;
+ char *string;
+ char *ptr;
+ size_t len;
+ size_t i;
+
+ string = (char*) (code + *start);
+
+ ptr = strchr((char*) string, ':');
+
+ if (ptr) len = ((unsigned long) ptr) - ((unsigned long) string);
+ else len = strlen(string);
+
+ s = malloc(len + 1);
+
+ if (!s) return NULL;
+
+ byte = code[(*start)++];
+ i = 0;
+
+ while (byte && byte != ':') {
+ s[i++] = byte;
+ byte = code[(*start)++];
+ }
+
+ s[i] = '\0';
+
+ return s;
+}
+
+BcStatus bc_program_printIndex(uint8_t *code, size_t *start) {
+
+ uint8_t bytes;
+ uint8_t byte;
+
+ bytes = code[(*start)++];
+ byte = 1;
+
+ if (printf(bc_program_byte_fmt, bytes) < 0) return BC_STATUS_IO_ERR;
+
+ for (uint8_t i = 0; byte && i < bytes; ++i) {
+ byte = code[(*start)++];
+ if (printf(bc_program_byte_fmt, byte) < 0) return BC_STATUS_IO_ERR;
+ }
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_program_printName(uint8_t *code, size_t *start) {
+
+ BcStatus status;
+ char byte;
+
+ status = BC_STATUS_SUCCESS;
+ byte = code[(*start)++];
+
+ while (byte && byte != ':') {
+ if (putchar(byte) == EOF) return BC_STATUS_IO_ERR;
+ byte = code[(*start)++];
+ }
+
+ if (byte) {
+ if (putchar(byte) == EOF) status = BC_STATUS_IO_ERR;
+ }
+ else status = BC_STATUS_PARSE_BUG;
+
+ return status;
+}
+
+BcStatus bc_program_printString(const char *str) {
+
+ char c;
+ char c2;
+ size_t len;
+ int err;
+
+ err = 0;
+
+ len = strlen(str);
+
+ for (size_t i = 0; i < len; ++i) {
+
+ c = str[i];
+
+ if (c != '\\') err = fputc(c, stdout);
+ else {
+
+ ++i;
+
+ if (i >= len) return BC_STATUS_EXEC_INVALID_STRING;
+
+ c2 = str[i];
+
+ switch (c2) {
+
+ case 'a':
+ {
+ err = fputc('\a', stdout);
+ break;
+ }
+
+ case 'b':
+ {
+ err = fputc('\b', stdout);
+ break;
+ }
+
+ case 'e':
+ {
+ err = fputc('\\', stdout);
+ break;
+ }
+
+ case 'f':
+ {
+ err = fputc('\f', stdout);
+ break;
+ }
+
+ case 'n':
+ {
+ err = fputc('\n', stdout);
+ break;
+ }
+
+ case 'r':
+ {
+ err = fputc('\r', stdout);
+ break;
+ }
+
+ case 'q':
+ {
+ fputc('"', stdout);
+ break;
+ }
+
+ case 't':
+ {
+ err = fputc('\t', stdout);
+ break;
+ }
+
+ default:
+ {
+ // Do nothing.
+ err = 0;
+ break;
+ }
+ }
+ }
+
+ if (err == EOF) return BC_STATUS_EXEC_PRINT_ERR;
+ }
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_program_push(BcProgram *p, uint8_t *code,
+ size_t *start, bool var)
+{
+ BcStatus status;
+ BcResult result;
+ char *s;
+
+ s = bc_program_name(code, start);
+
+ if (!s) return BC_STATUS_EXEC_UNDEFINED_VAR;
+
+ result.data.id.name = s;
+
+ if (var) {
+ result.type = BC_RESULT_VAR;
+ status = bc_vec_push(&p->expr_stack, &result);
+ }
+ else {
+
+ BcResult *operand;
+ BcNum *num;
+ unsigned long temp;
+
+ status = bc_program_unaryOpPrep(p, &operand, &num);
+
+ if (status) goto err;
+
+ status = bc_num_ulong(num, &temp);
+
+ if (status) goto err;
+
+ result.data.id.idx = (size_t) temp;
+
+ status = bc_program_unaryOpRetire(p, &result, BC_RESULT_ARRAY);
+ }
+
+ if (status) goto err;
+
+ return status;
+
+err:
+
+ free(s);
+
+ return status;
+}
+
+BcStatus bc_program_negate(BcProgram *p) {
+
+ BcStatus status;
+ BcResult result;
+ BcResult *ptr;
+ BcNum *num;
+
+ status = bc_program_unaryOpPrep(p, &ptr, &num);
+
+ if (status) return status;
+
+ status = bc_num_init(&result.data.num, num->len);
+
+ if (status) return status;
+
+ status = bc_num_copy(&result.data.num, num);
+
+ if (status) goto err;
+
+ result.data.num.neg = !result.data.num.neg;
+
+ status = bc_program_unaryOpRetire(p, &result, BC_RESULT_INTERMEDIATE);
+
+ if (status) goto err;
+
+ return status;
+
+err:
+
+ bc_num_free(&result.data.num);
+
+ return status;
+}
+
+BcStatus bc_program_logical(BcProgram *p, uint8_t inst) {
+
+ BcStatus status;
+ BcResult *operand1;
+ BcResult *operand2;
+ BcNum *num1;
+ BcNum *num2;
+ BcResult result;
+ BcNumInitFunc init;
+ bool cond;
+ int cmp;
+
+ status = bc_program_binaryOpPrep(p, &operand1, &num1, &operand2, &num2);
+
+ if (status) return status;
+
+ status = bc_num_init(&result.data.num, BC_NUM_DEF_SIZE);
+
+ if (status) return status;
+
+ if (inst == BC_INST_OP_BOOL_AND)
+ cond = bc_num_compare(num1, &p->zero) && bc_num_compare(num2, &p->zero);
+ else if (inst == BC_INST_OP_BOOL_OR)
+ cond = bc_num_compare(num1, &p->zero) || bc_num_compare(num2, &p->zero);
+ else {
+
+ cmp = bc_num_compare(num1, num2);
+
+ switch (inst) {
+ case BC_INST_OP_REL_EQUAL:
+ {
+ cond = cmp == 0;
+ break;
+ }
+
+ case BC_INST_OP_REL_LESS_EQ:
+ {
+ cond = cmp <= 0;
+ break;
+ }
+
+ case BC_INST_OP_REL_GREATER_EQ:
+ {
+ cond = cmp >= 0;
+ break;
+ }
+
+ case BC_INST_OP_REL_NOT_EQ:
+ {
+ cond = cmp != 0;
+ break;
+ }
+
+ case BC_INST_OP_REL_LESS:
+ {
+ cond = cmp < 0;
+ break;
+ }
+
+ case BC_INST_OP_REL_GREATER:
+ {
+ cond = cmp > 0;
+ break;
+ }
+
+ default:
+ {
+ return BC_STATUS_EXEC_INVALID_EXPR;
+ }
+ }
+ }
+
+ init = cond ? bc_num_one : bc_num_zero;
+ init(&result.data.num);
+
+ status = bc_program_binaryOpRetire(p, &result, BC_RESULT_INTERMEDIATE);
+
+ if (status) goto err;
+
+ return status;
+
+err:
+
+ bc_num_free(&result.data.num);
+
+ return status;
+}
+
+BcNumBinaryFunc bc_program_assignOp(uint8_t inst) {
+
+ switch (inst) {
+
+ case BC_INST_OP_ASSIGN_POWER:
+ {
+ return bc_num_pow;
+ }
+
+ case BC_INST_OP_ASSIGN_MULTIPLY:
+ {
+ return bc_num_mul;
+ }
+
+ case BC_INST_OP_ASSIGN_DIVIDE:
+ {
+ return bc_num_div;
+ }
+
+ case BC_INST_OP_ASSIGN_MODULUS:
+ {
+ return bc_num_mod;
+ }
+
+ case BC_INST_OP_ASSIGN_PLUS:
+ {
+ return bc_num_add;
+ }
+
+ case BC_INST_OP_ASSIGN_MINUS:
+ {
+ return bc_num_sub;
+ }
+
+ default:
+ {
+ return NULL;
+ }
+ }
+}
+
+BcStatus bc_program_assignScale(BcProgram *p, BcNum *scale,
+ BcNum *rval, uint8_t inst)
+{
+ BcStatus status;
+ unsigned long result;
+
+ switch (inst) {
+
+ case BC_INST_OP_ASSIGN_POWER:
+ case BC_INST_OP_ASSIGN_MULTIPLY:
+ case BC_INST_OP_ASSIGN_DIVIDE:
+ case BC_INST_OP_ASSIGN_MODULUS:
+ case BC_INST_OP_ASSIGN_PLUS:
+ case BC_INST_OP_ASSIGN_MINUS:
+ {
+ BcNumBinaryFunc op;
+
+ op = bc_program_assignOp(inst);
+
+ status = op(scale, rval, scale, p->scale);
+
+ if (status) return status;
+
+ break;
+ }
+
+ case BC_INST_OP_ASSIGN:
+ {
+ status = bc_num_copy(scale, rval);
+ if (status) return status;
+ break;
+ }
+
+ default:
+ {
+ return BC_STATUS_EXEC_INVALID_EXPR;
+ }
+ }
+
+ status = bc_num_ulong(scale, &result);
+
+ if (status) return status;
+
+ p->scale = (size_t) result;
+
+ return status;
+}
+
+BcStatus bc_program_assign(BcProgram *p, uint8_t inst) {
+
+ BcStatus status;
+ BcResult *left;
+ BcResult *right;
+ BcResult result;
+ BcNum *lval;
+ BcNum *rval;
+
+ status = bc_program_binaryOpPrep(p, &left, &lval, &right, &rval);
+
+ if (status) return status;
+
+ if (left->type == BC_RESULT_CONSTANT || left->type == BC_RESULT_INTERMEDIATE)
+ return BC_STATUS_EXEC_INVALID_LVALUE;
+
+ if (inst == BC_EXPR_ASSIGN_DIVIDE && !bc_num_compare(rval, &p->zero))
+ return BC_STATUS_MATH_DIVIDE_BY_ZERO;
+
+ if (left->type != BC_RESULT_SCALE) {
+
+ if (status) return status;
+
+ switch (inst) {
+
+ case BC_INST_OP_ASSIGN_POWER:
+ case BC_INST_OP_ASSIGN_MULTIPLY:
+ case BC_INST_OP_ASSIGN_DIVIDE:
+ case BC_INST_OP_ASSIGN_MODULUS:
+ case BC_INST_OP_ASSIGN_PLUS:
+ case BC_INST_OP_ASSIGN_MINUS:
+ {
+ BcNumBinaryFunc op;
+
+ op = bc_program_assignOp(inst);
+ status = op(lval, rval, lval, p->scale);
+
+ break;
+ }
+
+ case BC_INST_OP_ASSIGN:
+ {
+ status = bc_num_copy(lval, rval);
+ break;
+ }
+
+ default:
+ {
+ status = BC_STATUS_EXEC_INVALID_EXPR;
+ break;
+ }
+ }
+
+ if (status) return status;
+
+ if (left->type == BC_RESULT_IBASE || left->type == BC_RESULT_OBASE) {
+
+ unsigned long base;
+ size_t *ptr;
+
+ ptr = left->type == BC_RESULT_IBASE ? &p->ibase_t : &p->obase_t;
+
+ status = bc_num_ulong(lval, &base);
+
+ if (status) return status;
+
+ *ptr = (size_t) base;
+ }
+ }
+ else {
+ status = bc_program_assignScale(p, lval, rval, inst);
+ if (status) return status;
+ }
+
+ status = bc_num_init(&result.data.num, lval->len);
+
+ if (status) return status;
+
+ status = bc_num_copy(&result.data.num, lval);
+
+ if (status) goto err;
+
+ status = bc_program_binaryOpRetire(p, &result, BC_RESULT_INTERMEDIATE);
+
+ if (status) goto err;
+
+ return status;
+
+err:
+
+ bc_num_free(&result.data.num);
+
+ return status;
+}
+
+BcStatus bc_program_call(BcProgram *p, uint8_t *code, size_t *idx) {
+
+ BcStatus status;
+ BcInstPtr ip;
+ size_t nparams;
+ BcFunc *func;
+ BcAuto *auto_ptr;
+ BcResult *param;
+ size_t i;
+
+ nparams = bc_program_index(code, idx);
+
+ ip.idx = 0;
+ ip.len = p->expr_stack.len;
+
+ ip.func = bc_program_index(code, idx);
+
+ func = bc_vec_item(&p->funcs, ip.func);
+
+ if (!func) return BC_STATUS_EXEC_UNDEFINED_FUNC;
+
+ if (func->params.len != nparams) return BC_STATUS_EXEC_MISMATCHED_PARAMS;
+
+ for (i = 0; i < func->autos.len; ++i) {
+
+ auto_ptr = bc_vec_item(&func->autos, i);
+
+ if (!auto_ptr) return BC_STATUS_EXEC_UNDEFINED_VAR;
+
+ if (auto_ptr->var) bc_num_zero(&auto_ptr->data.num);
+ else {
+ status = bc_array_zero(&auto_ptr->data.array);
+ if (status) return status;
+ }
+ }
+
+ for (i = 0; i < func->params.len; ++i) {
+
+ auto_ptr = bc_vec_item_rev(&func->params, i);
+ param = bc_vec_item_rev(&p->expr_stack, i);
+
+ if (!auto_ptr || !param) return BC_STATUS_EXEC_UNDEFINED_VAR;
+
+ if (auto_ptr->var) {
+
+ BcNum *num;
+
+ status = bc_program_num(p, param, &num, false);
+
+ if (status) return status;
+
+ status = bc_num_copy(&auto_ptr->data.num, num);
+ }
+ else {
+
+ BcArray *array;
+
+ if (param->type != BC_RESULT_VAR || param->type != BC_RESULT_ARRAY)
+ return BC_STATUS_EXEC_INVALID_TYPE;
+
+ status = bc_program_search(p, param, (BcNum**) &array,
+ BC_PROGRAM_SEARCH_ARRAY_ONLY);
+
+ if (status) return status;
+
+ status = bc_array_copy(&auto_ptr->data.array, array);
+ }
+
+ if (status) return status;
+ }
+
+ return bc_vec_push(&p->stack, &ip);
+}
+
+BcStatus bc_program_return(BcProgram *p, uint8_t inst) {
+
+ BcStatus status;
+ BcResult result;
+ BcResult *operand;
+ size_t req;
+ BcInstPtr *ip;
+ BcFunc *func;
+ size_t len;
+
+ if (!BC_PROGRAM_CHECK_STACK(p)) return BC_STATUS_EXEC_INVALID_RETURN;
+
+ ip = bc_vec_top(&p->stack);
+
+ if (!ip) return BC_STATUS_EXEC_INVALID_STACK;
+
+ req = ip->len + (inst == BC_INST_RETURN ? 1 : 0);
+
+ if (!BC_PROGRAM_CHECK_EXPR_STACK(p, req))
+ return BC_STATUS_EXEC_INVALID_EXPR;
+
+ func = bc_vec_item(&p->funcs, ip->func);
+
+ if (!func) return BC_STATUS_EXEC_INVALID_STMT;
+
+ result.type = BC_RESULT_INTERMEDIATE;
+
+ if (inst == BC_INST_RETURN) {
+
+ BcNum *num;
+
+ operand = bc_vec_top(&p->expr_stack);
+
+ if (!operand) return BC_STATUS_EXEC_INVALID_EXPR;
+
+ status = bc_program_num(p, operand, &num, false);
+
+ if (status) return status;
+
+ status = bc_num_init(&result.data.num, num->len);
+
+ if (status) return status;
+
+ status = bc_num_copy(&result.data.num, num);
+
+ if (status) goto err;
+ }
+ else {
+
+ status = bc_num_init(&result.data.num, BC_NUM_DEF_SIZE);
+
+ if (status) return status;
+
+ bc_num_zero(&result.data.num);
+ }
+
+ // We need to pop arguments as well, so this takes that into account.
+ len = ip->len - func->params.len;
+ while (p->expr_stack.len > len) {
+ status = bc_vec_pop(&p->expr_stack);
+ if (status) goto err;
+ }
+
+ status = bc_vec_push(&p->expr_stack, &result);
+
+ if (status) goto err;
+
+ return bc_vec_pop(&p->stack);
+
+err:
+
+ bc_num_free(&result.data.num);
+
+ return status;
+}
+
+unsigned long bc_program_scale(BcNum *n) {
+ return (unsigned long) n->rdx;
+}
+
+unsigned long bc_program_length(BcNum *n) {
+ return (unsigned long) n->len;
+}
+
+BcStatus bc_program_builtin(BcProgram *p, uint8_t inst) {
+
+ BcStatus status;
+ BcResult *operand;
+ BcNum *num1;
+ BcResult result;
+
+ status = bc_program_unaryOpPrep(p, &operand, &num1);
+
+ if (status) return status;
+
+ status = bc_num_init(&result.data.num, BC_NUM_DEF_SIZE);
+
+ if (status) return status;
+
+ if (inst == BC_INST_SQRT) {
+ status = bc_num_sqrt(num1, &result.data.num, p->scale);
+ }
+ else {
+
+ BcProgramBuiltInFunc func;
+ unsigned long ans;
+
+ func = inst == BC_INST_LENGTH ? bc_program_length : bc_program_scale;
+
+ ans = func(num1);
+
+ status = bc_num_ulong2num(&result.data.num, ans);
+ }
+
+ if (status) goto err;
+
+ status = bc_program_unaryOpRetire(p, &result, BC_RESULT_INTERMEDIATE);
+
+ if (status) goto err;
+
+ return status;
+
+err:
+
+ bc_num_free(&result.data.num);
+
+ return status;
+}
+
+BcStatus bc_program_pushScale(BcProgram *p) {
+
+ BcStatus status;
+ BcResult result;
+
+ result.type = BC_RESULT_SCALE;
+ status = bc_num_init(&result.data.num, BC_NUM_DEF_SIZE);
+
+ if (status) return status;
+
+ status = bc_num_ulong2num(&result.data.num, (unsigned long) p->scale);
+
+ if (status) goto err;
+
+ status = bc_vec_push(&p->expr_stack, &result);
+
+ if (status) goto err;
+
+ return status;
+
+err:
+
+ bc_num_free(&result.data.num);
+
+ return status;
+}
+
+BcStatus bc_program_incdec(BcProgram *p, uint8_t inst) {
+
+ BcStatus status;
+ BcResult *ptr;
+ BcNum *num;
+ BcResult copy;
+ uint8_t inst2;
+ BcResult result;
+
+ status = bc_program_unaryOpPrep(p, &ptr, &num);
+
+ if (status) return status;
+
+ inst2 = inst == BC_INST_INC || inst == BC_INST_INC_DUP ?
+ BC_INST_OP_ASSIGN_PLUS : BC_INST_OP_ASSIGN_MINUS;
+
+ if (inst == BC_INST_INC_DUP || inst == BC_INST_DEC_DUP) {
+ copy.type = BC_RESULT_INTERMEDIATE;
+ status = bc_num_init(&copy.data.num, num->len);
+ if (status) return status;
+ }
+
+ result.type = BC_RESULT_ONE;
+
+ status = bc_vec_push(&p->expr_stack, &result);
+
+ if (status) goto err;
+
+ status = bc_program_assign(p, inst2);
+
+ if (status) goto err;
+
+ if (inst == BC_INST_INC_DUP || inst == BC_INST_DEC_DUP) {
+
+ status = bc_vec_pop(&p->expr_stack);
+
+ if (status) goto err;
+
+ status = bc_vec_push(&p->expr_stack, &copy);
+
+ if (status) goto err;
+ }
+
+ return status;
+
+err:
+
+ if (inst == BC_INST_INC_DUP || inst == BC_INST_DEC_DUP)
+ bc_num_free(&copy.data.num);
+
+ return status;
+}
+
+BcStatus bc_program_init(BcProgram *p) {
+
+ BcStatus s;
+ size_t idx;
+ char *name;
+ char *read_name;
+ BcInstPtr ip;
+
+ if (p == NULL) return BC_STATUS_INVALID_PARAM;
+
+ name = NULL;
+
+#ifdef _POSIX_BC_BASE_MAX
+ p->base_max = _POSIX_BC_BASE_MAX;
+#elif defined(_BC_BASE_MAX)
+ p->base_max = _BC_BASE_MAX;
+#else
+ errno = 0;
+ p->base_max = sysconf(_SC_BC_BASE_MAX);
+
+ if (p->base_max == -1) {
+ if (errno) return BC_STATUS_NO_LIMIT;
+ p->base_max = BC_BASE_MAX_DEF;
+ }
+ else if (p->base_max > BC_BASE_MAX_DEF) return BC_STATUS_INVALID_LIMIT;
+#endif
+
+#ifdef _POSIX_BC_DIM_MAX
+ p->dim_max = _POSIX_BC_DIM_MAX;
+#elif defined(_BC_DIM_MAX)
+ p->dim_max = _BC_DIM_MAX;
+#else
+ errno = 0;
+ p->dim_max = sysconf(_SC_BC_DIM_MAX);
+
+ if (p->dim_max == -1) {
+ if (errno) return BC_STATUS_NO_LIMIT;
+ p->dim_max = BC_DIM_MAX_DEF;
+ }
+ else if (p->dim_max > BC_DIM_MAX_DEF) return BC_STATUS_INVALID_LIMIT;
+#endif
+
+#ifdef _POSIX_BC_SCALE_MAX
+ p->scale_max = _POSIX_BC_SCALE_MAX;
+#elif defined(_BC_SCALE_MAX)
+ p->scale_max = _BC_SCALE_MAX;
+#else
+ errno = 0;
+ p->scale_max = sysconf(_SC_BC_SCALE_MAX);
+
+ if (p->scale_max == -1) {
+ if (errno) return BC_STATUS_NO_LIMIT;
+ p->scale_max = BC_SCALE_MAX_DEF;
+ }
+ else if (p->scale_max > BC_SCALE_MAX_DEF) return BC_STATUS_INVALID_LIMIT;
+#endif
+
+#ifdef _POSIX_BC_STRING_MAX
+ p->string_max = _POSIX_BC_STRING_MAX;
+#elif defined(_BC_STRING_MAX)
+ p->string_max = _BC_STRING_MAX;
+#else
+ errno = 0;
+ p->string_max = sysconf(_SC_BC_STRING_MAX);
+
+ if (p->string_max == -1) {
+ if (errno) return BC_STATUS_NO_LIMIT;
+ p->string_max = BC_STRING_MAX_DEF;
+ }
+ else if (p->string_max > BC_STRING_MAX_DEF) return BC_STATUS_INVALID_LIMIT;
+#endif
+
+ p->scale = 0;
+
+ s = bc_num_init(&p->ibase, BC_NUM_DEF_SIZE);
+
+ if (s) return s;
+
+ bc_num_ten(&p->ibase);
+ p->ibase_t = 10;
+
+ s = bc_num_init(&p->obase, BC_NUM_DEF_SIZE);
+
+ if (s) goto obase_err;
+
+ bc_num_ten(&p->obase);
+ p->obase_t = 10;
+
+ s = bc_num_init(&p->last, BC_NUM_DEF_SIZE);
+
+ if (s) goto last_err;
+
+ bc_num_zero(&p->last);
+
+ s = bc_num_init(&p->zero, BC_NUM_DEF_SIZE);
+
+ if (s) goto zero_err;
+
+ bc_num_zero(&p->zero);
+
+ s = bc_num_init(&p->one, BC_NUM_DEF_SIZE);
+
+ if (s) goto one_err;
+
+ bc_num_one(&p->one);
+
+ p->num_buf = malloc(BC_PROGRAM_BUF_SIZE + 1);
+
+ if (!p->num_buf) {
+ s = BC_STATUS_MALLOC_FAIL;
+ goto num_buf_err;
+ }
+
+ p->buf_size = BC_PROGRAM_BUF_SIZE;
+
+ s = bc_vec_init(&p->funcs, sizeof(BcFunc), bc_func_free);
+
+ if (s) goto func_err;
+
+ s = bc_veco_init(&p->func_map, sizeof(BcEntry), bc_entry_free, bc_entry_cmp);
+
+ if (s) goto func_map_err;
+
+ name = malloc(strlen(bc_lang_func_main) + 1);
+
+ if (!name) {
+ s = BC_STATUS_MALLOC_FAIL;
+ goto name_err;
+ }
+
+ strcpy(name, bc_lang_func_main);
+
+ s = bc_program_func_add(p, name, &idx);
+
+ name = NULL;
+
+ if (s || idx != BC_PROGRAM_MAIN_FUNC) goto read_err;
+
+ read_name = malloc(strlen(bc_lang_func_read) + 1);
+
+ if (!read_name) {
+ s = BC_STATUS_MALLOC_FAIL;
+ goto read_err;
+ }
+
+ strcpy(read_name, bc_lang_func_read);
+
+ s = bc_program_func_add(p, read_name, &idx);
+
+ read_name = NULL;
+
+ if (s || idx != BC_PROGRAM_READ_FUNC) goto var_err;
+
+ s = bc_vec_init(&p->vars, sizeof(BcVar), bc_var_free);
+
+ if (s) goto var_err;
+
+ s = bc_veco_init(&p->var_map, sizeof(BcEntry), bc_entry_free, bc_entry_cmp);
+
+ if (s) goto var_map_err;
+
+ s = bc_vec_init(&p->arrays, sizeof(BcArray), bc_array_free);
+
+ if (s) goto array_err;
+
+ s = bc_veco_init(&p->array_map, sizeof(BcEntry), bc_entry_free, bc_entry_cmp);
+
+ if (s) goto array_map_err;
+
+ s = bc_vec_init(&p->strings, sizeof(char*), bc_string_free);
+
+ if (s) goto string_err;
+
+ s = bc_vec_init(&p->constants, sizeof(char*), bc_constant_free);
+
+ if (s) goto const_err;
+
+ s = bc_vec_init(&p->expr_stack, sizeof(BcResult), bc_result_free);
+
+ if (s) goto expr_err;
+
+ s = bc_vec_init(&p->stack, sizeof(BcInstPtr), NULL);
+
+ if (s) goto stack_err;
+
+ ip.idx = 0;
+ ip.func = 0;
+ ip.len = 0;
+
+ s = bc_vec_push(&p->stack, &ip);
+
+ if (s) goto push_err;
+
+ return s;
+
+push_err:
+
+ bc_vec_free(&p->stack);
+
+stack_err:
+
+ bc_vec_free(&p->expr_stack);
+
+expr_err:
+
+ bc_vec_free(&p->constants);
+
+const_err:
+
+ bc_vec_free(&p->strings);
+
+string_err:
+
+ bc_veco_free(&p->array_map);
+
+array_map_err:
+
+ bc_vec_free(&p->arrays);
+
+array_err:
+
+ bc_veco_free(&p->var_map);
+
+var_map_err:
+
+ bc_vec_free(&p->vars);
+
+var_err:
+
+ if (read_name) free(read_name);
+
+read_err:
+
+ if (name) free(name);
+
+name_err:
+
+ bc_veco_free(&p->func_map);
+
+func_map_err:
+
+ bc_vec_free(&p->funcs);
+
+func_err:
+
+ free(p->num_buf);
+
+num_buf_err:
+
+ bc_num_free(&p->one);
+
+one_err:
+
+ bc_num_free(&p->zero);
+
+zero_err:
+
+ bc_num_free(&p->last);
+
+last_err:
+
+ bc_num_free(&p->obase);
+
+obase_err:
+
+ bc_num_free(&p->ibase);
+
+ return s;
+}
+
+void bc_program_limits(BcProgram *p) {
+
+ putchar('\n');
+
+ printf("BC_BASE_MAX = %ld\n", p->base_max);
+ printf("BC_DIM_MAX = %ld\n", p->dim_max);
+ printf("BC_SCALE_MAX = %ld\n", p->scale_max);
+ printf("BC_STRING_MAX = %ld\n", p->string_max);
+ printf("Max Exponent = %ld\n", LONG_MAX);
+ printf("Number of Vars = %u\n", UINT32_MAX);
+
+ putchar('\n');
+}
+
+BcStatus bc_program_func_add(BcProgram *p, char *name, size_t *idx) {
+
+ BcStatus status;
+ BcEntry entry;
+ BcEntry *entry_ptr;
+ BcFunc f;
+
+ if (!p || !name || !idx) return BC_STATUS_INVALID_PARAM;
+
+ entry.name = name;
+ entry.idx = p->funcs.len;
+
+ status = bc_veco_insert(&p->func_map, &entry, idx);
+
+ if (status) {
+ free(name);
+ if (status != BC_STATUS_VECO_ITEM_EXISTS) return status;
+ }
+
+ entry_ptr = bc_veco_item(&p->func_map, *idx);
+
+ if (!entry_ptr) return BC_STATUS_EXEC_UNDEFINED_FUNC;
+
+ *idx = entry_ptr->idx;
+
+ if (status == BC_STATUS_VECO_ITEM_EXISTS) {
+
+ BcFunc *func;
+
+ func = bc_vec_item(&p->funcs, entry_ptr->idx);
+
+ if (!func) return BC_STATUS_EXEC_UNDEFINED_FUNC;
+
+ status = BC_STATUS_SUCCESS;
+
+ // We need to reset these so the function can be repopulated.
+ while (!status && func->autos.len) status = bc_vec_pop(&func->autos);
+ while (!status && func->params.len) status = bc_vec_pop(&func->params);
+ }
+ else {
+
+ status = bc_func_init(&f);
+
+ if (status) return status;
+
+ status = bc_vec_push(&p->funcs, &f);
+ }
+
+ return status;
+}
+
+BcStatus bc_program_var_add(BcProgram *p, char *name, size_t *idx) {
+
+ BcStatus status;
+ BcEntry entry;
+ BcVar v;
+
+ if (!p || !name || !idx) return BC_STATUS_INVALID_PARAM;
+
+ entry.name = name;
+ entry.idx = p->vars.len;
+
+ status = bc_veco_insert(&p->var_map, &entry, idx);
+
+ if (status) return status == BC_STATUS_VECO_ITEM_EXISTS ?
+ BC_STATUS_SUCCESS : status;
+
+ status = bc_var_init(&v);
+
+ if (status) return status;
+
+ return bc_vec_push(&p->vars, &v);
+}
+
+BcStatus bc_program_array_add(BcProgram *p, char *name, size_t *idx) {
+
+ BcStatus status;
+ BcEntry entry;
+ BcArray a;
+
+ if (!p || !name || !idx) return BC_STATUS_INVALID_PARAM;
+
+ entry.name = name;
+ entry.idx = p->arrays.len;
+
+ status = bc_veco_insert(&p->array_map, &entry, idx);
+
+ if (status) return status == BC_STATUS_VECO_ITEM_EXISTS ?
+ BC_STATUS_SUCCESS : status;
+
+ status = bc_array_init(&a);
+
+ if (status) return status;
+
+ return bc_vec_push(&p->arrays, &a);
+}
+
+BcStatus bc_program_exec(BcProgram *p) {
+
+ BcStatus status;
+ uint8_t *code;
+ size_t idx;
+ int pchars;
+ BcResult result;
+ BcFunc *func;
+ BcInstPtr *ip;
+ bool cond;
+
+ ip = bc_vec_top(&p->stack);
+
+ if (!ip) return BC_STATUS_EXEC_INVALID_STACK;
+
+ func = bc_vec_item(&p->funcs, ip->func);
+
+ if (!func) return BC_STATUS_EXEC_INVALID_STACK;
+
+ status = BC_STATUS_SUCCESS;
+
+ code = func->code.array;
+ cond = false;
+
+ while (ip->idx < func->code.len) {
+
+ uint8_t inst;
+
+ inst = code[(ip->idx)++];
+
+ switch (inst) {
+
+ case BC_INST_CALL:
+ {
+ status = bc_program_call(p, code, &ip->idx);
+ break;
+ }
+
+ case BC_INST_RETURN:
+ case BC_INST_RETURN_ZERO:
+ {
+ status = bc_program_return(p, inst);
+ break;
+ }
+
+ case BC_INST_READ:
+ {
+ status = bc_program_read(p);
+ break;
+ }
+
+ case BC_INST_JUMP_NOT_ZERO:
+ case BC_INST_JUMP_ZERO:
+ {
+ BcResult *operand;
+ BcNum *num;
+
+ status = bc_program_unaryOpPrep(p, &operand, &num);
+
+ if (status) return status;
+
+ cond = bc_num_compare(num, &p->zero) == 0;
+
+ status = bc_vec_pop(&p->expr_stack);
+
+ if (status) return status;
+
+ // Fallthrough.
+ }
+ case BC_INST_JUMP:
+ {
+ size_t idx;
+ size_t *addr;
+
+ idx = bc_program_index(code, &ip->idx);
+ addr = bc_vec_item(&func->labels, idx);
+
+ if (!addr) return BC_STATUS_EXEC_INVALID_LABEL;
+
+ if (inst == BC_INST_JUMP ||
+ (inst == BC_INST_JUMP_ZERO && cond) ||
+ (inst == BC_INST_JUMP_NOT_ZERO && !cond))
+ {
+ ip->idx = *addr;
+ }
+
+ break;
+ }
+
+ case BC_INST_PUSH_VAR:
+ case BC_INST_PUSH_ARRAY:
+ {
+ status = bc_program_push(p, code, &ip->idx, inst == BC_INST_PUSH_VAR);
+ break;
+ }
+
+ case BC_INST_PUSH_LAST:
+ {
+ result.type = BC_RESULT_LAST;
+ status = bc_vec_push(&p->expr_stack, &result);
+ break;
+ }
+
+ case BC_INST_PUSH_SCALE:
+ {
+ status = bc_program_pushScale(p);
+ break;
+ }
+
+ case BC_INST_PUSH_IBASE:
+ {
+ result.type = BC_RESULT_IBASE;
+ status = bc_vec_push(&p->expr_stack, &result);
+ break;
+ }
+
+ case BC_INST_PUSH_OBASE:
+ {
+ result.type = BC_RESULT_OBASE;
+ status = bc_vec_push(&p->expr_stack, &result);
+ break;
+ }
+
+ case BC_INST_SCALE_FUNC:
+ case BC_INST_LENGTH:
+ case BC_INST_SQRT:
+ {
+ status = bc_program_builtin(p, inst);
+ break;
+ }
+
+ case BC_INST_PUSH_NUM:
+ {
+ BcResult result;
+
+ result.type = BC_RESULT_CONSTANT;
+ result.data.id.idx = bc_program_index(code, &ip->idx);
+
+ status = bc_vec_push(&p->expr_stack, &result);
+
+ break;
+ }
+
+ case BC_INST_POP:
+ {
+ status = bc_vec_pop(&p->expr_stack);
+ break;
+ }
+
+ case BC_INST_INC_DUP:
+ case BC_INST_DEC_DUP:
+ case BC_INST_INC:
+ case BC_INST_DEC:
+ {
+ status = bc_program_incdec(p, inst);
+ break;
+ }
+
+ case BC_INST_HALT:
+ {
+ status = BC_STATUS_EXEC_HALT;
+ break;
+ }
+
+ case BC_INST_PRINT:
+ case BC_INST_PRINT_EXPR:
+ {
+ BcResult *operand;
+ BcNum *num;
+
+ status = bc_program_unaryOpPrep(p, &operand, &num);
+
+ if (status) return status;
+
+ status = bc_num_print(num, &p->obase, p->obase_t,
+ inst == BC_INST_PRINT);
+
+ fflush(stdout);
+
+ if (status) return status;
+
+ status = bc_num_copy(&p->last, num);
+
+ if (status) return status;
+
+ status = bc_vec_pop(&p->expr_stack);
+
+ break;
+ }
+
+ case BC_INST_STR:
+ {
+ const char *string;
+
+ idx = bc_program_index(code, &ip->idx);
+
+ if (idx >= p->strings.len) return BC_STATUS_EXEC_INVALID_STRING;
+
+ string = bc_vec_item(&p->strings, idx);
+
+ pchars = fprintf(stdout, "%s", string);
+ status = pchars > 0 ? BC_STATUS_SUCCESS :
+ BC_STATUS_EXEC_PRINT_ERR;
+
+ break;
+ }
+
+ case BC_INST_PRINT_STR:
+ {
+ const char **string;
+
+ idx = bc_program_index(code, &ip->idx);
+
+ if (idx >= p->strings.len) return BC_STATUS_EXEC_INVALID_STRING;
+
+ string = bc_vec_item(&p->strings, idx);
+
+ if (!string) return BC_STATUS_EXEC_INVALID_STRING;
+
+ status = bc_program_printString(*string);
+
+ break;
+ }
+
+ case BC_INST_OP_POWER:
+ case BC_INST_OP_MULTIPLY:
+ case BC_INST_OP_DIVIDE:
+ case BC_INST_OP_MODULUS:
+ case BC_INST_OP_PLUS:
+ case BC_INST_OP_MINUS:
+ {
+ status = bc_program_op(p, inst);
+ break;
+ }
+
+ case BC_INST_OP_REL_EQUAL:
+ case BC_INST_OP_REL_LESS_EQ:
+ case BC_INST_OP_REL_GREATER_EQ:
+ case BC_INST_OP_REL_NOT_EQ:
+ case BC_INST_OP_REL_LESS:
+ case BC_INST_OP_REL_GREATER:
+ {
+ status = bc_program_logical(p, inst);
+ break;
+ }
+
+ case BC_INST_OP_BOOL_NOT:
+ {
+ BcResult *ptr;
+ BcNum *num;
+
+ status = bc_program_unaryOpPrep(p, &ptr, &num);
+
+ if (status) return status;
+
+ status = bc_num_init(&result.data.num, BC_NUM_DEF_SIZE);
+
+ if (status) return status;
+
+ if (bc_num_compare(num, &p->zero)) bc_num_one(&result.data.num);
+ else bc_num_zero(&result.data.num);
+
+ status = bc_program_unaryOpRetire(p, &result, BC_RESULT_INTERMEDIATE);
+
+ if (status) bc_num_free(&result.data.num);
+
+ break;
+ }
+
+ case BC_INST_OP_BOOL_OR:
+ case BC_INST_OP_BOOL_AND:
+ {
+ status = bc_program_logical(p, inst);
+ break;
+ }
+
+ case BC_INST_OP_NEGATE:
+ {
+ status = bc_program_negate(p);
+ break;
+ }
+
+ case BC_INST_OP_ASSIGN_POWER:
+ case BC_INST_OP_ASSIGN_MULTIPLY:
+ case BC_INST_OP_ASSIGN_DIVIDE:
+ case BC_INST_OP_ASSIGN_MODULUS:
+ case BC_INST_OP_ASSIGN_PLUS:
+ case BC_INST_OP_ASSIGN_MINUS:
+ case BC_INST_OP_ASSIGN:
+ {
+ status = bc_program_assign(p, inst);
+ break;
+ }
+
+ default:
+ {
+ status = BC_STATUS_EXEC_INVALID_STMT;
+ break;
+ }
+ }
+
+ if (status) return status;
+
+ // We keep getting these because if the size of the
+ // stack changes, pointers may end up being invalid.
+ ip = bc_vec_top(&p->stack);
+
+ if (!ip) return BC_STATUS_EXEC_INVALID_STACK;
+
+ func = bc_vec_item(&p->funcs, ip->func);
+
+ if (!func) return BC_STATUS_EXEC_INVALID_STACK;
+
+ code = func->code.array;
+ }
+
+ return status;
+}
+
+BcStatus bc_program_print(BcProgram *p) {
+
+ BcStatus status;
+ BcFunc *func;
+ uint8_t *code;
+ BcInstPtr ip;
+ size_t i;
+
+ status = BC_STATUS_SUCCESS;
+
+ for (i = 0; !status && i < p->funcs.len; ++i) {
+
+ ip.idx = 0;
+ ip.func = i;
+ ip.len = 0;
+
+ func = bc_vec_item(&p->funcs, ip.func);
+
+ if (!func) return BC_STATUS_EXEC_INVALID_STACK;
+
+ code = func->code.array;
+
+ if (printf("func[%zu]: ", ip.func) < 0) return BC_STATUS_IO_ERR;
+
+ while (ip.idx < func->code.len) {
+
+ uint8_t inst;
+
+ inst = code[ip.idx++];
+
+ switch (inst) {
+
+ case BC_INST_PUSH_VAR:
+ case BC_INST_PUSH_ARRAY:
+ {
+ if (putchar(inst) == EOF) return BC_STATUS_IO_ERR;
+ status = bc_program_printName(code, &ip.idx);
+ break;
+ }
+
+ case BC_INST_CALL:
+ {
+ if (putchar(inst) == EOF) return BC_STATUS_IO_ERR;
+
+ status = bc_program_printIndex(code, &ip.idx);
+
+ if (status) return status;
+
+ status = bc_program_printIndex(code, &ip.idx);
+
+ break;
+ }
+
+ case BC_INST_JUMP:
+ case BC_INST_JUMP_NOT_ZERO:
+ case BC_INST_JUMP_ZERO:
+ case BC_INST_PUSH_NUM:
+ case BC_INST_STR:
+ case BC_INST_PRINT_STR:
+ {
+ if (putchar(inst) == EOF) return BC_STATUS_IO_ERR;
+ bc_program_printIndex(code, &ip.idx);
+ break;
+ }
+
+ default:
+ {
+ if (putchar(inst) == EOF) return BC_STATUS_IO_ERR;
+ break;
+ }
+ }
+ }
+
+ if (status) return status;
+
+ if (putchar('\n') == EOF) status = BC_STATUS_IO_ERR;
+ }
+
+ return status;
+}
+
+void bc_program_free(BcProgram *p) {
+
+ if (p == NULL) return;
+
+ free(p->num_buf);
+
+ bc_num_free(&p->ibase);
+ bc_num_free(&p->obase);
+
+ bc_vec_free(&p->funcs);
+ bc_veco_free(&p->func_map);
+
+ bc_vec_free(&p->vars);
+ bc_veco_free(&p->var_map);
+
+ bc_vec_free(&p->arrays);
+ bc_veco_free(&p->array_map);
+
+ bc_vec_free(&p->strings);
+ bc_vec_free(&p->constants);
+
+ bc_vec_free(&p->expr_stack);
+ bc_vec_free(&p->stack);
+
+ bc_num_free(&p->last);
+ bc_num_free(&p->zero);
+ bc_num_free(&p->one);
+
+ memset(p, 0, sizeof(BcProgram));
+}
+
+void bc_vm_sigint(int sig) {
+
+ struct sigaction act;
+ ssize_t err;
+
+ sigemptyset(&act.sa_mask);
+ act.sa_handler = bc_vm_sigint;
+
+ sigaction(SIGINT, &act, NULL);
+
+ if (sig == SIGINT) {
+ err = write(STDERR_FILENO, bc_program_sigint_msg,
+ strlen(bc_program_sigint_msg));
+ if (err >= 0) bcg.bc_signal = 1;
+ }
+}
+
+BcStatus bc_vm_signal(BcVm *vm) {
+
+ BcStatus status;
+ BcFunc *func;
+ BcInstPtr *ip;
+
+ bcg.bc_signal = 0;
+
+ while (vm->program.stack.len > 1) {
+
+ status = bc_vec_pop(&vm->program.stack);
+
+ if (status) return status;
+ }
+
+ func = bc_vec_item(&vm->program.funcs, 0);
+
+ if (!func) return BC_STATUS_EXEC_UNDEFINED_FUNC;
+
+ ip = bc_vec_top(&vm->program.stack);
+
+ if (!ip) return BC_STATUS_EXEC_INVALID_STMT;
+
+ ip->idx = func->code.len;
+
+ return BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_vm_execFile(BcVm *vm, int idx) {
+
+ BcStatus status;
+ const char *file;
+ char *data;
+ BcProgramExecFunc exec;
+
+ exec = bcg.bc_code ? bc_program_print : bc_program_exec;
+
+ file = vm->filev[idx];
+ vm->program.file = file;
+
+ status = bc_io_fread(file, &data);
+
+ if (status) return status;
+
+ status = bc_parse_file(&vm->parse, file);
+
+ if (status) goto read_err;
+
+ status = bc_parse_text(&vm->parse, data);
+
+ if (status) goto read_err;
+
+ do {
+
+ status = bc_parse_parse(&vm->parse);
+
+ if (status && status != BC_STATUS_LEX_EOF && status != BC_STATUS_PARSE_EOF)
+ {
+ bc_error_file(status, vm->parse.lex.file, vm->parse.lex.line);
+ goto err;
+ }
+
+ if (bcg.bc_signal) {
+ if (!bcg.bc_interactive) goto read_err;
+ else {
+ status = bc_vm_signal(vm);
+ if (status) goto read_err;
+ }
+ }
+
+ if (status) {
+
+ if (status != BC_STATUS_LEX_EOF &&
+ status != BC_STATUS_PARSE_EOF &&
+ status != BC_STATUS_PARSE_QUIT &&
+ status != BC_STATUS_PARSE_LIMITS)
+ {
+ bc_error_file(status, vm->program.file, vm->parse.lex.line);
+ goto err;
+ }
+ else if (status == BC_STATUS_PARSE_QUIT) {
+ break;
+ }
+ else if (status == BC_STATUS_PARSE_LIMITS) {
+ bc_program_limits(&vm->program);
+ status = BC_STATUS_SUCCESS;
+ continue;
+ }
+
+ while (!status && vm->parse.token.type != BC_LEX_NEWLINE &&
+ vm->parse.token.type != BC_LEX_SEMICOLON)
+ {
+ status = bc_lex_next(&vm->parse.lex, &vm->parse.token);
+ }
+ }
+
+ } while (!status);
+
+ if (status != BC_STATUS_PARSE_EOF &&
+ status != BC_STATUS_LEX_EOF &&
+ status != BC_STATUS_PARSE_QUIT)
+ {
+ goto read_err;
+ }
+
+ if (BC_PARSE_CAN_EXEC(&vm->parse)) {
+
+ status = exec(&vm->program);
+
+ if (status) goto read_err;
+
+ if (bcg.bc_interactive) {
+
+ fflush(stdout);
+
+ if (bcg.bc_signal) {
+
+ status = bc_vm_signal(vm);
+
+ fprintf(stderr, "%s", bc_program_ready_prompt);
+ fflush(stderr);
+ }
+ }
+ else if (bcg.bc_signal) {
+ status = bc_vm_signal(vm);
+ goto read_err;
+ }
+ }
+ else status = BC_STATUS_EXEC_FILE_NOT_EXECUTABLE;
+
+read_err:
+
+ bc_error(status);
+
+err:
+
+ free(data);
+
+ return status;
+}
+
+BcStatus bc_vm_execStdin(BcVm *vm) {
+
+ BcStatus status;
+ char *buf;
+ char *buffer;
+ char *temp;
+ size_t n;
+ size_t bufn;
+ size_t slen;
+ size_t total_len;
+ bool string;
+ bool comment;
+
+ vm->program.file = bc_program_stdin_name;
+
+ status = bc_parse_file(&vm->parse, bc_program_stdin_name);
+
+ if (status) return status;
+
+ n = BC_VM_BUF_SIZE;
+ bufn = BC_VM_BUF_SIZE;
+ buffer = malloc(BC_VM_BUF_SIZE + 1);
+
+ if (!buffer) return BC_STATUS_MALLOC_FAIL;
+
+ buffer[0] = '\0';
+
+ buf = malloc(BC_VM_BUF_SIZE + 1);
+
+ if (!buf) {
+ status = BC_STATUS_MALLOC_FAIL;
+ goto buf_err;
+ }
+
+ string = false;
+ comment = false;
+
+ // The following loop is complicated because the vm tries
+ // not to send any lines that end with a backslash to the
+ // parser. The reason for that is because the parser treats
+ // a backslash newline combo as whitespace, per the bc spec.
+ // Thus, the parser will expect more stuff. That is also
+ // the case with strings and comments.
+ while ((!status || status != BC_STATUS_PARSE_QUIT) &&
+ !(status = bc_io_getline(&buf, &bufn)))
+ {
+ size_t len;
+
+ len = strlen(buf);
+ slen = strlen(buffer);
+ total_len = slen + len;
+
+ if (len == 1 && buf[0] == '"') string = !string;
+ else if (len > 1 || comment) {
+
+ for (uint32_t i = 0; i < len; ++i) {
+
+ char c;
+ bool notend;
+
+ notend = len > i + 1;
+
+ c = buf[i];
+
+ if (c == '"') string = !string;
+ else if (c == '/' && notend && !comment && buf[i + 1] == '*') {
+ comment = true;
+ break;
+ }
+ else if (c == '*' && notend && comment && buf[i + 1] == '/') {
+ comment = false;
+ }
+ }
+
+ if (string || comment || buf[len - 2] == '\\') {
+
+ if (total_len > n) {
+
+ temp = realloc(buffer, total_len + 1);
+
+ if (!temp) {
+ status = BC_STATUS_MALLOC_FAIL;
+ goto exit_err;
+ }
+
+ buffer = temp;
+ n = slen + len;
+ }
+
+ strcat(buffer, buf);
+
+ continue;
+ }
+ }
+
+ if (total_len > n) {
+
+ temp = realloc(buffer, total_len + 1);
+
+ if (!temp) {
+ status = BC_STATUS_MALLOC_FAIL;
+ goto exit_err;
+ }
+
+ buffer = temp;
+ n = slen + len;
+ }
+
+ strcat(buffer, buf);
+
+ status = bc_parse_text(&vm->parse, buffer);
+
+ if (!bcg.bc_signal) {
+
+ if (status) {
+
+ if (status == BC_STATUS_PARSE_QUIT ||
+ status == BC_STATUS_LEX_EOF ||
+ status == BC_STATUS_PARSE_EOF)
+ {
+ break;
+ }
+ else if (status == BC_STATUS_PARSE_LIMITS) {
+ bc_program_limits(&vm->program);
+ status = BC_STATUS_SUCCESS;
+ }
+ else {
+ bc_error(status);
+ goto exit_err;
+ }
+ }
+ }
+ else if (status == BC_STATUS_PARSE_QUIT) {
+ break;
+ }
+ else if (status == BC_STATUS_PARSE_LIMITS) {
+ bc_program_limits(&vm->program);
+ status = BC_STATUS_SUCCESS;
+ }
+
+ while (!status) status = bc_parse_parse(&vm->parse);
+
+ if (status == BC_STATUS_PARSE_QUIT) break;
+ else if (status == BC_STATUS_PARSE_LIMITS) {
+ bc_program_limits(&vm->program);
+ status = BC_STATUS_SUCCESS;
+ }
+ else if (status != BC_STATUS_LEX_EOF && status != BC_STATUS_PARSE_EOF) {
+
+ BcFunc *func;
+ BcInstPtr *ip;
+
+ bc_error_file(status, vm->program.file, vm->parse.lex.line);
+
+ ip = bc_vec_item(&vm->program.stack, 0);
+ func = bc_vec_item(&vm->program.funcs, 0);
+
+ if (ip && func) ip->idx = func->code.len;
+
+ while (vm->parse.token.type != BC_LEX_NEWLINE &&
+ vm->parse.token.type != BC_LEX_SEMICOLON)
+ {
+ status = bc_lex_next(&vm->parse.lex, &vm->parse.token);
+
+ if (status && status != BC_STATUS_LEX_EOF) {
+
+ bc_error_file(status, vm->program.file, vm->parse.lex.line);
+
+ ip = bc_vec_item(&vm->program.stack, 0);
+ func = bc_vec_item(&vm->program.funcs, 0);
+
+ if (ip && func) ip->idx = func->code.len;
+
+ break;
+ }
+ else if (status == BC_STATUS_LEX_EOF) {
+ status = BC_STATUS_SUCCESS;
+ break;
+ }
+ }
+ }
+
+ if (BC_PARSE_CAN_EXEC(&vm->parse)) {
+
+ if (!bcg.bc_code) {
+
+ status = bc_program_exec(&vm->program);
+
+ if (status) {
+ bc_error(status);
+ goto exit_err;
+ }
+
+ if (bcg.bc_interactive) {
+
+ fflush(stdout);
+
+ if (bcg.bc_signal) {
+ status = bc_vm_signal(vm);
+ fprintf(stderr, "%s", bc_program_ready_prompt);
+ }
+ }
+ else if (bcg.bc_signal) {
+ status = bc_vm_signal(vm);
+ goto exit_err;
+ }
+ }
+ else {
+
+ bc_program_print(&vm->program);
+
+ if (bcg.bc_interactive) {
+
+ fflush(stdout);
+
+ if (bcg.bc_signal) {
+ status = bc_vm_signal(vm);
+ fprintf(stderr, "%s", bc_program_ready_prompt);
+ }
+ }
+ else if (bcg.bc_signal) {
+ status = bc_vm_signal(vm);
+ goto exit_err;
+ }
+ }
+ }
+
+ buffer[0] = '\0';
+ }
+
+ status = !status || status == BC_STATUS_PARSE_QUIT ||
+ status == BC_STATUS_EXEC_HALT ||
+ status == BC_STATUS_LEX_EOF ||
+ status == BC_STATUS_PARSE_EOF ?
+ BC_STATUS_SUCCESS : status;
+
+exit_err:
+
+ free(buf);
+
+buf_err:
+
+ free(buffer);
+
+ return status;
+}
+
+BcStatus bc_vm_init(BcVm *vm, int filec, const char *filev[]) {
+
+ BcStatus status;
+ struct sigaction act;
+
+ sigemptyset(&act.sa_mask);
+ act.sa_handler = bc_vm_sigint;
+
+ if (sigaction(SIGINT, &act, NULL) < 0) return BC_STATUS_EXEC_SIGACTION_FAIL;
+
+ status = bc_program_init(&vm->program);
+
+ if (status) return status;
+
+ status = bc_parse_init(&vm->parse, &vm->program);
+
+ if (status) {
+ bc_program_free(&vm->program);
+ return status;
+ }
+
+ vm->filec = filec;
+ vm->filev = filev;
+
+ return BC_STATUS_SUCCESS;
+}
+
+void bc_vm_free(BcVm *vm) {
+ bc_parse_free(&vm->parse);
+ bc_program_free(&vm->program);
+}
+
+BcStatus bc_vm_exec(BcVm *vm) {
+
+ BcStatus status;
+ int num_files;
+
+ status = BC_STATUS_SUCCESS;
+
+ num_files = vm->filec;
+
+ for (int i = 0; !status && i < num_files; ++i) status = bc_vm_execFile(vm, i);
+
+ if (status != BC_STATUS_SUCCESS &&
+ status != BC_STATUS_PARSE_QUIT &&
+ status != BC_STATUS_EXEC_HALT)
+ {
+ return status;
+ }
+
+ status = bc_vm_execStdin(vm);
+
+ status = status == BC_STATUS_PARSE_QUIT ||
+ status == BC_STATUS_EXEC_HALT ?
+ BC_STATUS_SUCCESS : status;
+
+ return status;
+}
+
+BcStatus bc_print_version() {
+
+ int err;
+
+ err = printf(bc_version_fmt, bc_version, bc_copyright, bc_warranty_short);
+
+ return err < 0 ? BC_STATUS_IO_ERR : BC_STATUS_SUCCESS;
+}
+
+void bc_error(BcStatus status) {
+
+ if (!status || status == BC_STATUS_PARSE_QUIT ||
+ status == BC_STATUS_EXEC_HALT ||
+ status >= BC_STATUS_POSIX_NAME_LEN)
+ {
+ return;
+ }
+
+ fprintf(stderr, "\n%s error: %s\n\n",
+ bc_err_types[status], bc_err_descs[status]);
+}
+
+void bc_error_file(BcStatus status, const char *file, uint32_t line) {
+
+ if (!status || status == BC_STATUS_PARSE_QUIT ||
+ !file || status >= BC_STATUS_POSIX_NAME_LEN)
+ {
+ return;
+ }
+
+ fprintf(stderr, "\n%s error: %s\n", bc_err_types[status],
+ bc_err_descs[status]);
+
+ fprintf(stderr, " %s", file);
+
+ if (line) fprintf(stderr, ":%d\n\n", line);
+ else fprintf(stderr, "\n\n");
+}
+
+BcStatus bc_posix_error(BcStatus status, const char *file,
+ uint32_t line, const char *msg)
+{
+ if (!(bcg.bc_std || bcg.bc_warn) ||
+ status < BC_STATUS_POSIX_NAME_LEN ||
+ !file)
+ {
+ return BC_STATUS_SUCCESS;
+ }
+
+ fprintf(stderr, "\n%s %s: %s\n", bc_err_types[status],
+ bcg.bc_std ? "error" : "warning", bc_err_descs[status]);
+
+ if (msg) fprintf(stderr, " %s\n", msg);
+
+ fprintf(stderr, " %s", file);
+
+ if (line) fprintf(stderr, ":%d\n\n", line);
+ else fprintf(stderr, "\n\n");
+
+ return bcg.bc_std ? status : BC_STATUS_SUCCESS;
+}
+
+BcStatus bc_exec(unsigned int flags, unsigned int filec, const char *filev[]) {
+
+ BcStatus status;
+ BcVm vm;
+
+ if (flags & BC_FLAG_INTERACTIVE ||
+ (isatty(STDIN_FILENO) && isatty(STDOUT_FILENO)))
+ {
+ bcg.bc_interactive = 1;
+ }
+ else bcg.bc_interactive = 0;
+
+ bcg.bc_code = flags & BC_FLAG_CODE;
+ bcg.bc_std = flags & BC_FLAG_STANDARD;
+ bcg.bc_warn = flags & BC_FLAG_WARN;
+
+ if (!(flags & BC_FLAG_QUIET)) {
+
+ status = bc_print_version();
+
+ if (status) return status;
+ }
+
+ status = bc_vm_init(&vm, filec, filev);
+
+ if (status) return status;
+
+ if (flags & BC_FLAG_MATHLIB) {
+
+ status = bc_parse_file(&vm.parse, bc_lib_name);
+
+ if (status) goto err;
+
+ status = bc_parse_text(&vm.parse, (const char*) bc_lib);
+
+ if (status) goto err;
+
+ while (!status) status = bc_parse_parse(&vm.parse);
+
+ if (status != BC_STATUS_LEX_EOF && status != BC_STATUS_PARSE_EOF) goto err;
+
+ // Make sure to execute the math library.
+ status = bc_program_exec(&vm.program);
+
+ if (status) goto err;
+ }
+
+ status = bc_vm_exec(&vm);
+
+err:
+
+ bc_vm_free(&vm);
+
+ return status;
+}
+
+void bc_main(void) {
+
+ unsigned int flags;
+
+ flags = (unsigned int) toys.optflags;
+
+ toys.exitval = (char) bc_exec(flags, toys.optc, (const char**) toys.optargs);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 14:34:00 +0000