diff options
| -rw-r--r-- | miscutils/bc.c | 46 |
1 files changed, 44 insertions, 2 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c index 02a61ac49..84bbe7b14 100644 --- a/miscutils/bc.c +++ b/miscutils/bc.c @@ -138,11 +138,53 @@ //usage: //usage:#define dc_full_usage "\n" //usage: "\nTiny RPN calculator. Operations:" -//usage: "\n+, -, *, /, %, ~, ^," IF_FEATURE_DC_BIG(" |,") +//usage: "\nArithmetic: + - * / % ^" +//usage: IF_FEATURE_DC_BIG( +//usage: "\n~ - divide with remainder" +//usage: "\n| - modular exponentiation" +//usage: "\nv - square root" +//////// "\n_NNN - push neagtive number -NNN +//////// "\n[string] - push string +//////// "\nR - DC_LEX_POP pop and discard +//////// "\nc - DC_LEX_CLEAR_STACK clear stack +//////// "\nd - DC_LEX_DUPLICATE pop, push, push +//////// "\nr - DC_LEX_SWAP pop 1, pop 2, push 1, push 2 +//////// "\n:r - DC_LEX_COLON pop index, pop value, store to array 'r' +//////// "\n;r - DC_LEX_SCOLON pop index, fetch from array 'r', push +//////// "\nLr - DC_LEX_LOAD_PO, pop register 'r', push +//////// "\nSr - DC_LEX_STORE_PUSH pop, push to register 'r' +//////// "\nlr - DC_LEX_LOAD read register 'r', push +//////// "\nsr - DC_LEX_OP_ASSIGN pop, assign to register 'r' +//////// "\n? - DC_LEX_READ read line and execute +//////// "\nx - DC_LEX_EXECUTE pop string and execute +//////// "\n<r - XC_LEX_OP_REL_GT pop, pop, execute register 'r' if top-of-stack was greater +//////// "\n>r - XC_LEX_OP_REL_LT pop, pop, execute register 'r' if top-of-stack was less +//////// "\n=r - XC_LEX_OP_REL_EQ pop, pop, execute register 'r' if equal +//////// "\n!<r !>r !=r - negated forms +//////// "\ne - DC_LEX_ELSE >tef: "if greater execute 't' else execute 'f'" +//////// "\nQ - DC_LEX_NQUIT pop, "break N" from macro invocations +//////// "\nq - DC_LEX_QUIT "break 2" (if less than 2 levels of macros, exit dc) +//////// "\nX - DC_LEX_SCALE_FACTOR pop, push number of fractional digits +//////// "\nZ - DC_LEX_LENGTH pop, push number of digits it has (or number of characters in string) +//////// "\na - DC_LEX_ASCIIFY pop, push low-order byte as char or 1st string char +//////// "\n( - DC_LEX_LPAREN ? +//////// "\n{ - DC_LEX_LBRACE ? +//////// "\n_ - XC_LEX_NEG (not a command - starts negative number) +//////// "\nG - DC_LEX_EQ_NO_REG (? GNU dc has no such cmd) +//////// "\nN - DC_LEX_OP_BOOL_NOT (? GNU dc has no such cmd) +//////// "\nn - DC_LEX_PRINT_POP pop, print without newline +//////// "\nP - DC_LEX_PRINT_STREAM pop, print string or hex bytes +//usage: ) //usage: "\np - print top of the stack without popping" //usage: "\nf - print entire stack" -//usage: "\nk - pop the value and set the precision" +//////// "\nz - DC_LEX_STACK_LEVEL push stack depth +//////// "\nK - DC_LEX_SCALE push precision +//////// "\nI - DC_LEX_IBASE push input radix +//////// "\nO - DC_LEX_OBASE push output radix +//usage: IF_FEATURE_DC_BIG( +//usage: "\nk - pop the value and set precision" //usage: "\ni - pop the value and set input radix" +//usage: ) //usage: "\no - pop the value and set output radix" //usage: "\nExamples: dc -e'2 2 + p' -> 4, dc -e'8 8 * 2 2 + / p' -> 16" //usage: |