Function stbi__mad3sizes_valid

lite/example/cpp_example/mge/cv/stb_image.h:1057–1060

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

// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow
static int stbi__mad3sizes_valid(int a, int b, int c, int add) {
    return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) &&
           stbi__addsizes_valid(a * b * c, 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) || !defined(STBI_NO_PNM)