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check for overflow during division

This commit is contained in:
Alyssa Milburn 2014-07-26 10:40:51 +02:00
parent 575c8da393
commit 578f7361eb
1 changed files with 3 additions and 2 deletions
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5
forf.c
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@ -30,6 +30,7 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <limits.h>
#include "forf.h" #include "forf.h"
#include "dump.h" #include "dump.h"
@ -348,7 +349,7 @@ forf_proc_div(struct forf_env *env)
long a = forf_pop_num(env); long a = forf_pop_num(env);
long b = forf_pop_num(env); long b = forf_pop_num(env);
if (0 == a) { if (0 == a || (a == -1 && b == LONG_MIN)) {
env->error = forf_error_divzero; env->error = forf_error_divzero;
return; return;
} }
@ -361,7 +362,7 @@ forf_proc_mod(struct forf_env *env)
long a = forf_pop_num(env); long a = forf_pop_num(env);
long b = forf_pop_num(env); long b = forf_pop_num(env);
if (0 == a) { if (0 == a || (a == -1 && b == LONG_MIN)) {
env->error = forf_error_divzero; env->error = forf_error_divzero;
return; return;
} }