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Use stbi__mad4sizes_valid() only if STBI_NO_LINEAR or STBI_NO_HDR are defined

pull/502/head
darealshinji 2017-09-04 14:01:43 +02:00 committed by GitHub
parent 9d9f75eb68
commit b6b43df186
1 changed files with 5 additions and 1 deletions
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6
stb_image.h
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@ -503,7 +503,7 @@ STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const ch
#include <string.h>
#include <limits.h>
#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
#if !defined(STBI_NO_LINEAR) && !defined(STBI_NO_HDR)
#include <math.h> // ldexp
#endif
@ -893,11 +893,13 @@ static int stbi__mad3sizes_valid(int a, int b, int c, int add)
}
// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow
#if !defined(STBI_NO_LINEAR) && !defined(STBI_NO_HDR)
static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add)
{
return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add);
}
#endif
// mallocs with size overflow checking
static void *stbi__malloc_mad2(int a, int b, int add)
@ -912,11 +914,13 @@ static void *stbi__malloc_mad3(int a, int b, int c, int add)
return stbi__malloc(a*b*c + add);
}
#if !defined(STBI_NO_LINEAR) && !defined(STBI_NO_HDR)
static void *stbi__malloc_mad4(int a, int b, int c, int d, int add)
{
if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL;
return stbi__malloc(a*b*c*d + add);
}
#endif
// stbi__err - error
// stbi__errpf - error returning pointer to float