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-rw-r--r--miscutils/bc.c403
1 files changed, 263 insertions, 140 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c
index 7a11e63de..45680c139 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -445,19 +445,21 @@ typedef enum BcLexType {
BC_LEX_NAME,
BC_LEX_NUMBER,
- BC_LEX_KEY_AUTO,
+ BC_LEX_KEY_1st_keyword,
+ BC_LEX_KEY_AUTO = BC_LEX_KEY_1st_keyword,
BC_LEX_KEY_BREAK,
BC_LEX_KEY_CONTINUE,
BC_LEX_KEY_DEFINE,
BC_LEX_KEY_ELSE,
BC_LEX_KEY_FOR,
BC_LEX_KEY_HALT,
- BC_LEX_KEY_IBASE,
+ // code uses "type - BC_LEX_KEY_IBASE + BC_INST_IBASE" construct,
+ BC_LEX_KEY_IBASE, // relative order should match for: BC_INST_IBASE
BC_LEX_KEY_IF,
- BC_LEX_KEY_LAST,
+ BC_LEX_KEY_LAST, // relative order should match for: BC_INST_LAST
BC_LEX_KEY_LENGTH,
BC_LEX_KEY_LIMITS,
- BC_LEX_KEY_OBASE,
+ BC_LEX_KEY_OBASE, // relative order should match for: BC_INST_OBASE
BC_LEX_KEY_PRINT,
BC_LEX_KEY_QUIT,
BC_LEX_KEY_READ,
@@ -494,8 +496,68 @@ typedef enum BcLexType {
BC_LEX_NQUIT,
BC_LEX_SCALE_FACTOR,
#endif
-
} BcLexType;
+// must match order of BC_LEX_KEY_foo etc above
+#if ENABLE_BC
+struct BcLexKeyword {
+ char name8[8];
+};
+#define BC_LEX_KW_ENTRY(a, b, c) \
+ { .name8 = a /*, .len = b, .posix = c*/ }
+static const struct BcLexKeyword bc_lex_kws[20] = {
+ BC_LEX_KW_ENTRY("auto" , 4, 1), // 0
+ BC_LEX_KW_ENTRY("break" , 5, 1), // 1
+ BC_LEX_KW_ENTRY("continue", 8, 0), // 2 note: this one has no terminating NUL
+ BC_LEX_KW_ENTRY("define" , 6, 1), // 3
+
+ BC_LEX_KW_ENTRY("else" , 4, 0), // 4
+ BC_LEX_KW_ENTRY("for" , 3, 1), // 5
+ BC_LEX_KW_ENTRY("halt" , 4, 0), // 6
+ BC_LEX_KW_ENTRY("ibase" , 5, 1), // 7
+
+ BC_LEX_KW_ENTRY("if" , 2, 1), // 8
+ BC_LEX_KW_ENTRY("last" , 4, 0), // 9
+ BC_LEX_KW_ENTRY("length" , 6, 1), // 10
+ BC_LEX_KW_ENTRY("limits" , 6, 0), // 11
+
+ BC_LEX_KW_ENTRY("obase" , 5, 1), // 12
+ BC_LEX_KW_ENTRY("print" , 5, 0), // 13
+ BC_LEX_KW_ENTRY("quit" , 4, 1), // 14
+ BC_LEX_KW_ENTRY("read" , 4, 0), // 15
+
+ BC_LEX_KW_ENTRY("return" , 6, 1), // 16
+ BC_LEX_KW_ENTRY("scale" , 5, 1), // 17
+ BC_LEX_KW_ENTRY("sqrt" , 4, 1), // 18
+ BC_LEX_KW_ENTRY("while" , 5, 1), // 19
+};
+enum {
+ POSIX_KWORD_MASK = 0
+ | (1 << 0)
+ | (1 << 1)
+ | (0 << 2)
+ | (1 << 3)
+ \
+ | (0 << 4)
+ | (1 << 5)
+ | (0 << 6)
+ | (1 << 7)
+ \
+ | (1 << 8)
+ | (0 << 9)
+ | (1 << 10)
+ | (0 << 11)
+ \
+ | (1 << 12)
+ | (0 << 13)
+ | (1 << 14)
+ | (0 << 15)
+ \
+ | (1 << 16)
+ | (1 << 17)
+ | (1 << 18)
+ | (1 << 19)
+};
+#endif
struct BcLex;
typedef BcStatus (*BcLexNext)(struct BcLex *);
@@ -611,17 +673,6 @@ typedef struct BcParse {
#if ENABLE_BC
-typedef struct BcLexKeyword {
- const char name[9];
- const char len;
- const bool posix;
-} BcLexKeyword;
-
-#define BC_LEX_KW_ENTRY(a, b, c) \
- { \
- .name = a, .len = (b), .posix = (c) \
- }
-
static BcStatus bc_lex_token(BcLex *l);
#define BC_PARSE_TOP_OP(p) (*((BcLexType *) bc_vec_top(&(p)->ops)))
@@ -755,28 +806,6 @@ struct globals {
static void bc_vm_info(void);
#if ENABLE_BC
-static const BcLexKeyword bc_lex_kws[20] = {
- BC_LEX_KW_ENTRY("auto", 4, true),
- BC_LEX_KW_ENTRY("break", 5, true),
- BC_LEX_KW_ENTRY("continue", 8, false),
- BC_LEX_KW_ENTRY("define", 6, true),
- BC_LEX_KW_ENTRY("else", 4, false),
- BC_LEX_KW_ENTRY("for", 3, true),
- BC_LEX_KW_ENTRY("halt", 4, false),
- BC_LEX_KW_ENTRY("ibase", 5, true),
- BC_LEX_KW_ENTRY("if", 2, true),
- BC_LEX_KW_ENTRY("last", 4, false),
- BC_LEX_KW_ENTRY("length", 6, true),
- BC_LEX_KW_ENTRY("limits", 6, false),
- BC_LEX_KW_ENTRY("obase", 5, true),
- BC_LEX_KW_ENTRY("print", 5, false),
- BC_LEX_KW_ENTRY("quit", 4, true),
- BC_LEX_KW_ENTRY("read", 4, false),
- BC_LEX_KW_ENTRY("return", 6, true),
- BC_LEX_KW_ENTRY("scale", 5, true),
- BC_LEX_KW_ENTRY("sqrt", 4, true),
- BC_LEX_KW_ENTRY("while", 5, true),
-};
// This is an array that corresponds to token types. An entry is
// true if the token is valid in an expression, false otherwise.
@@ -825,8 +854,6 @@ static const BcLexType dc_lex_regs[] = {
BC_LEX_STORE_PUSH,
};
-static const size_t dc_lex_regs_len = sizeof(dc_lex_regs) / sizeof(BcLexType);
-
static const BcLexType dc_lex_tokens[] = {
BC_LEX_OP_MODULUS, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_LPAREN,
BC_LEX_INVALID, BC_LEX_OP_MULTIPLY, BC_LEX_OP_PLUS, BC_LEX_INVALID,
@@ -892,86 +919,178 @@ static const char bc_program_stdin_name[] = "<stdin>";
static const char *bc_lib_name = "gen/lib.bc";
static const 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,
- 61,115,99,97,108,101,10,9,114,61,54,43,115,43,48,46,52,52,42,120,10,9,115,99,
- 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,
- 9,112,61,120,10,9,102,61,118,61,49,10,9,102,111,114,40,105,61,50,59,118,33,
- 61,48,59,43,43,105,41,123,10,9,9,112,42,61,120,10,9,9,102,42,61,105,10,9,9,
- 118,61,112,47,102,10,9,9,114,43,61,118,10,9,125,10,9,119,104,105,108,101,40,
- 40,100,45,45,41,33,61,48,41,114,42,61,114,10,9,115,99,97,108,101,61,115,10,
- 9,105,98,97,115,101,61,98,10,9,105,102,40,110,33,61,48,41,114,101,116,117,114,
- 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,
- 10,9,115,99,97,108,101,43,61,54,10,9,112,61,50,10,9,119,104,105,108,101,40,
- 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,
- 40,120,45,49,41,47,40,120,43,49,41,10,9,113,61,97,42,97,10,9,118,61,49,10,9,
- 102,111,114,40,105,61,51,59,118,33,61,48,59,105,43,61,50,41,123,10,9,9,97,42,
- 61,113,10,9,9,118,61,97,47,105,10,9,9,114,43,61,118,10,9,125,10,9,114,42,61,
- 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,
- 97,108,101,10,9,115,99,97,108,101,61,49,46,49,42,115,43,50,10,9,97,61,97,40,
- 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,
- 52,10,9,120,61,120,45,52,42,113,42,97,10,9,105,102,40,113,37,50,33,61,48,41,
- 120,61,45,120,10,9,115,99,97,108,101,61,115,43,50,10,9,114,61,97,61,120,10,
- 9,113,61,45,120,42,120,10,9,102,111,114,40,105,61,51,59,97,33,61,48,59,105,
- 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,
- 114,43,61,97,10,9,125,10,9,115,99,97,108,101,61,115,10,9,105,98,97,115,101,
- 61,98,10,9,105,102,40,110,33,61,48,41,114,101,116,117,114,110,40,45,114,47,
- 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,
- 9,115,99,97,108,101,42,61,49,46,50,10,9,120,61,115,40,50,42,97,40,49,41,43,
- 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,
- 40,115,99,97,108,101,60,54,53,41,123,10,9,9,9,114,101,116,117,114,110,40,46,
- 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,
- 9,105,102,40,120,61,61,46,50,41,123,10,9,9,105,102,40,115,99,97,108,101,60,
- 54,53,41,123,10,9,9,9,114,101,116,117,114,110,40,46,49,57,55,51,57,53,53,53,
- 57,56,52,57,56,56,48,55,53,56,51,55,48,48,52,57,55,54,53,49,57,52,55,57,48,
- 50,57,51,52,52,55,53,56,53,49,48,51,55,56,55,56,53,50,49,48,49,53,49,55,54,
- 56,56,57,52,48,50,47,110,41,10,9,9,125,10,9,125,10,9,115,61,115,99,97,108,101,
- 10,9,105,102,40,120,62,46,50,41,123,10,9,9,115,99,97,108,101,43,61,53,10,9,
- 9,97,61,97,40,46,50,41,10,9,125,10,9,115,99,97,108,101,61,115,43,51,10,9,119,
- 104,105,108,101,40,120,62,46,50,41,123,10,9,9,109,43,61,49,10,9,9,120,61,40,
- 120,45,46,50,41,47,40,49,43,46,50,42,120,41,10,9,125,10,9,114,61,117,61,120,
- 10,9,102,61,45,120,42,120,10,9,116,61,49,10,9,102,111,114,40,105,61,51,59,116,
- 33,61,48,59,105,43,61,50,41,123,10,9,9,117,42,61,102,10,9,9,116,61,117,47,105,
- 10,9,9,114,43,61,116,10,9,125,10,9,115,99,97,108,101,61,115,10,9,105,98,97,
- 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,
- 97,42,61,105,10,9,115,99,97,108,101,61,49,46,53,42,115,10,9,97,61,40,120,94,
- 110,41,47,50,94,110,47,97,10,9,114,61,118,61,49,10,9,102,61,45,120,42,120,47,
- 52,10,9,115,99,97,108,101,61,115,99,97,108,101,43,108,101,110,103,116,104,40,
- 97,41,45,115,99,97,108,101,40,97,41,10,9,102,111,114,40,105,61,49,59,118,33,
- 61,48,59,43,43,105,41,123,10,9,9,118,61,118,42,102,47,105,47,40,110,43,105,
- 41,10,9,9,114,43,61,118,10,9,125,10,9,115,99,97,108,101,61,115,10,9,105,98,
- 97,115,101,61,98,10,9,105,102,40,111,33,61,48,41,97,61,45,97,10,9,114,101,116,
- 117,114,110,40,97,42,114,47,49,41,10,125,10,0
+ "scale=20"
+"\ndefine e(x){"
+"\n auto b,s,n,r,d,i,p,f,v"
+"\n b=ibase"
+"\n ibase=A"
+"\n if(x<0){"
+"\n n=1"
+"\n x=-x"
+"\n }"
+"\n s=scale"
+"\n r=6+s+0.44*x"
+"\n scale=scale(x)+1"
+"\n while(x>1){"
+"\n d+=1"
+"\n x/=2"
+"\n scale+=1"
+"\n }"
+"\n scale=r"
+"\n r=x+1"
+"\n p=x"
+"\n f=v=1"
+"\n for(i=2;v!=0;++i){"
+"\n p*=x"
+"\n f*=i"
+"\n v=p/f"
+"\n r+=v"
+"\n }"
+"\n while((d--)!=0)r*=r"
+"\n scale=s"
+"\n ibase=b"
+"\n if(n!=0)return(1/r)"
+"\n return(r/1)"
+"\n}"
+"\ndefine l(x){"
+"\n auto b,s,r,p,a,q,i,v"
+"\n b=ibase"
+"\n ibase=A"
+"\n if(x<=0){"
+"\n r=(1-10^scale)/1"
+"\n ibase=b"
+"\n return(r)"
+"\n }"
+"\n s=scale"
+"\n scale+=6"
+"\n p=2"
+"\n while(x>=2){"
+"\n p*=2"
+"\n x=sqrt(x)"
+"\n }"
+"\n while(x<=0.5){"
+"\n p*=2"
+"\n x=sqrt(x)"
+"\n }"
+"\n r=a=(x-1)/(x+1)"
+"\n q=a*a"
+"\n v=1"
+"\n for(i=3;v!=0;i+=2){"
+"\n a*=q"
+"\n v=a/i"
+"\n r+=v"
+"\n }"
+"\n r*=p"
+"\n scale=s"
+"\n ibase=b"
+"\n return(r/1)"
+"\n}"
+"\ndefine s(x){"
+"\n auto b,s,r,n,a,q,i"
+"\n b=ibase"
+"\n ibase=A"
+"\n s=scale"
+"\n scale=1.1*s+2"
+"\n a=a(1)"
+"\n if(x<0){"
+"\n n=1"
+"\n x=-x"
+"\n }"
+"\n scale=0"
+"\n q=(x/a+2)/4"
+"\n x=x-4*q*a"
+"\n if(q%2!=0)x=-x"
+"\n scale=s+2"
+"\n r=a=x"
+"\n q=-x*x"
+"\n for(i=3;a!=0;i+=2){"
+"\n a*=q/(i*(i-1))"
+"\n r+=a"
+"\n }"
+"\n scale=s"
+"\n ibase=b"
+"\n if(n!=0)return(-r/1)"
+"\n return(r/1)"
+"\n}"
+"\ndefine c(x){"
+"\n auto b,s"
+"\n b=ibase"
+"\n ibase=A"
+"\n s=scale"
+"\n scale*=1.2"
+"\n x=s(2*a(1)+x)"
+"\n scale=s"
+"\n ibase=b"
+"\n return(x/1)"
+"\n}"
+"\ndefine a(x){"
+"\n auto b,s,r,n,a,m,t,f,i,u"
+"\n b=ibase"
+"\n ibase=A"
+"\n n=1"
+"\n if(x<0){"
+"\n n=-1"
+"\n x=-x"
+"\n }"
+"\n if(x==1){"
+"\n if(scale<65){"
+"\n return(.7853981633974483096156608458198757210492923498437764552437361480/n)"
+"\n }"
+"\n }"
+"\n if(x==.2){"
+"\n if(scale<65){"
+"\n return(.1973955598498807583700497651947902934475851037878521015176889402/n)"
+"\n }"
+"\n }"
+"\n s=scale"
+"\n if(x>.2){"
+"\n scale+=5"
+"\n a=a(.2)"
+"\n }"
+"\n scale=s+3"
+"\n while(x>.2){"
+"\n m+=1"
+"\n x=(x-.2)/(1+.2*x)"
+"\n }"
+"\n r=u=x"
+"\n f=-x*x"
+"\n t=1"
+"\n for(i=3;t!=0;i+=2){"
+"\n u*=f"
+"\n t=u/i"
+"\n r+=t"
+"\n }"
+"\n scale=s"
+"\n ibase=b"
+"\n return((m*a+r)/n)"
+"\n}"
+"\ndefine j(n,x){"
+"\n auto b,s,o,a,i,v,f"
+"\n b=ibase"
+"\n ibase=A"
+"\n s=scale"
+"\n scale=0"
+"\n n/=1"
+"\n if(n<0){"
+"\n n=-n"
+"\n if(n%2==1)o=1"
+"\n }"
+"\n a=1"
+"\n for(i=2;i<=n;++i)a*=i"
+"\n scale=1.5*s"
+"\n a=(x^n)/2^n/a"
+"\n r=v=1"
+"\n f=-x*x/4"
+"\n scale=scale+length(a)-scale(a)"
+"\n for(i=1;v!=0;++i){"
+"\n v=v*f/i/(n+i)"
+"\n r+=v"
+"\n }"
+"\n scale=s"
+"\n ibase=b"
+"\n if(o!=0)a=-a"
+"\n return(a*r/1)"
+"\n}"
};
#endif // ENABLE_BC
@@ -2913,32 +3032,35 @@ static BcStatus bc_lex_text(BcLex *l, const char *text)
static BcStatus bc_lex_identifier(BcLex *l)
{
BcStatus s;
- size_t i;
+ unsigned i;
const char *buf = l->buf + l->i - 1;
- for (i = 0; i < sizeof(bc_lex_kws) / sizeof(bc_lex_kws[0]); ++i) {
-
- unsigned long len = (unsigned long) bc_lex_kws[i].len;
-
- if (strncmp(buf, bc_lex_kws[i].name, len) == 0) {
-
- l->t.t = BC_LEX_KEY_AUTO + (BcLexType) i;
-
- if (!bc_lex_kws[i].posix) {
- s = bc_posix_error("POSIX does not allow the following keyword:"); // bc_lex_kws[i].name
- if (s) return s;
- }
-
- // We minus 1 because the index has already been incremented.
- l->i += len - 1;
- return BC_STATUS_SUCCESS;
+ for (i = 0; i < ARRAY_SIZE(bc_lex_kws); ++i) {
+ const char *keyword8 = bc_lex_kws[i].name8;
+ unsigned j = 0;
+ while (buf[j] != '\0' && buf[j] == keyword8[j]) {
+ j++;
+ if (j == 8) goto match;
+ }
+ if (keyword8[j] != '\0')
+ continue;
+ match:
+ // buf starts with keyword bc_lex_kws[i]
+ l->t.t = BC_LEX_KEY_1st_keyword + i;
+ if ((1 << i) & POSIX_KWORD_MASK) {
+ s = bc_posix_error("POSIX does not allow the following keyword:"); // bc_lex_kws[i].name8
+ if (s) return s;
}
+
+ // We minus 1 because the index has already been incremented.
+ l->i += j - 1;
+ return BC_STATUS_SUCCESS;
}
s = bc_lex_name(l);
if (s) return s;
- if (l->t.v.len - 1 > 1)
+ if (l->t.v.len > 2)
s = bc_posix_error("POSIX only allows one character names; the following is bad:"); // buf
return s;
@@ -3351,8 +3473,9 @@ static BcStatus dc_lex_token(BcLex *l)
char c = l->buf[l->i++], c2;
size_t i;
- for (i = 0; i < dc_lex_regs_len; ++i) {
- if (l->t.last == dc_lex_regs[i]) return dc_lex_register(l);
+ for (i = 0; i < ARRAY_SIZE(dc_lex_regs); ++i) {
+ if (l->t.last == dc_lex_regs[i])
+ return dc_lex_register(l);
}
if (c >= '%' && c <= '~' &&
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 16:19:38 +0000