Function stbi__mad2sizes_valid

include/stb/stb_image.h:1024–1027

returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow

#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR)
// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow
static int stbi__mad2sizes_valid(int a, int b, int add)
{
   return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add);
}
#endif

// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow