yyc12345/stb
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

stb_divide: use return value to indicate errors

Browse Source
This commit is contained in:
yangfl 2019-04-04 11:38:56 +08:00
parent c72a95d766
commit 5db48d3604
1 changed files with 14 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
stb_divide.h
View File

@ -275,24 +275,32 @@ int stb_mod_eucl(int v1, int v2)
#include <limits.h>
int show=0;
int err=0;
void stbdiv_check(int q, int r, int a, int b, char *type, int dir)
{
if ((dir > 0 && r < 0) || (dir < 0 && r > 0))
if ((dir > 0 && r < 0) || (dir < 0 && r > 0)) {
fprintf(stderr, "FAILED: %s(%d,%d) remainder %d in wrong direction\n", type,a,b,r);
else
err++;
} else
if (b != INT_MIN) // can't compute abs(), but if b==INT_MIN all remainders are valid
if (r <= -abs(b) || r >= abs(b))
if (r <= -abs(b) || r >= abs(b)) {
fprintf(stderr, "FAILED: %s(%d,%d) remainder %d out of range\n", type,a,b,r);
err++;
}
#ifdef STB_DIVIDE_TEST_64
{
STB_DIVIDE_TEST_64 q64 = q, r64=r, a64=a, b64=b;
if (q64*b64+r64 != a64)
if (q64*b64+r64 != a64) {
fprintf(stderr, "FAILED: %s(%d,%d) remainder %d doesn't match quotient %d\n", type,a,b,r,q);
err++;
}
}
#else
if (q*b+r != a)
if (q*b+r != a) {
fprintf(stderr, "FAILED: %s(%d,%d) remainder %d doesn't match quotient %d\n", type,a,b,r,q);
err++;
}
#endif
}
@ -372,7 +380,7 @@ int main(int argc, char **argv)
testh(INT_MIN , INT_MAX);
testh(INT_MIN+1, INT_MAX);
return 0;
return err > 0 ? 1 : 0;
}
#endif // STB_DIVIDE_TEST
#endif // STB_DIVIDE_IMPLEMENTATION