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| author | Denys Vlasenko | 2019-05-16 09:40:36 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2019-05-16 09:40:36 +0200 |
| commit | 1113961dde21ce73c1543ca466913d9e17d06c1b (patch) | |
| tree | 2956a47d072fd613c05d2a31f4f363addc64e8f5 /miscutils | |
| parent | abe248b20880d4d3831ba0a188f69d4a8126498a (diff) | |
| download | busybox-1113961dde21ce73c1543ca466913d9e17d06c1b.zip busybox-1113961dde21ce73c1543ca466913d9e17d06c1b.tar.gz | |
dc: make 4 % 0 emit error messgaes and set result to 0
function old new delta
mod 105 136 +31
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'miscutils')
| -rw-r--r-- | miscutils/dc.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/miscutils/dc.c b/miscutils/dc.c index 5119c13..5aef64b 100644 --- a/miscutils/dc.c +++ b/miscutils/dc.c @@ -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); } |