1113961dd
Denys Vlasenko
2019-05-16
Subject
dc: make 4 % 0 emit error messgaes and set result to 0
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miscutils/dc.c+12 -7
| @@ -94,13 +94,18 @@ static void mod(void) | |
| { | |
| data_t d = pop(); | |
| - | //if (d == 0) { |
| - | // bb_error_msg("remainder by zero"); |
| - | // pop(); |
| - | // push(0); |
| - | // return; |
| - | //} |
| - | //^^^^ without this, we simply get SIGFPE and die |
| + | /* compat with dc (GNU bc 1.07.1) 1.4.1: |
| + | * $ dc -e '4 0 % p' |
| + | * dc: remainder by zero |
| + | * 0 |
| + | */ |
| + | if (d == 0) { |
| + | bb_error_msg("remainder by zero"); |
| + | pop(); |
| + | push(0); |
| + | return; |
| + | } |
| + | /* ^^^^ without this, we simply get SIGFPE and die */ |
| push((data_t) pop() % d); | |
| } | |