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Add bitmask to unsigned char casts to fix MSVC runtime checks

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This commit is contained in:
Jonas Karlsson 2015-10-20 23:22:27 +02:00
parent 385927fb4b
commit b95858a2f7
1 changed files with 23 additions and 21 deletions
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44
stb_image_write.h
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@ -180,6 +180,8 @@ STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w,
#define STBIW_ASSERT(x) assert(x)
#endif
#define STBIW_UCHAR(x) (unsigned char) ((x) & 0xff)
typedef struct
{
stbi_write_func *func;
@ -228,21 +230,21 @@ static void stbiw__writefv(stbi__write_context *s, const char *fmt, va_list v)
while (*fmt) {
switch (*fmt++) {
case ' ': break;
case '1': { unsigned char x = (unsigned char) va_arg(v, int);
case '1': { unsigned char x = STBIW_UCHAR(va_arg(v, int));
s->func(s->context,&x,1);
break; }
case '2': { int x = va_arg(v,int);
unsigned char b[2];
b[0] = (unsigned char) x;
b[1] = (unsigned char) (x>>8);
b[0] = STBIW_UCHAR(x);
b[1] = STBIW_UCHAR(x>>8);
s->func(s->context,b,2);
break; }
case '4': { stbiw_uint32 x = va_arg(v,int);
unsigned char b[4];
b[0]=(unsigned char)x;
b[1]=(unsigned char)(x>>8);
b[2]=(unsigned char)(x>>16);
b[3]=(unsigned char)(x>>24);
b[0]=STBIW_UCHAR(x);
b[1]=STBIW_UCHAR(x>>8);
b[2]=STBIW_UCHAR(x>>16);
b[3]=STBIW_UCHAR(x>>24);
s->func(s->context,b,4);
break; }
default:
@ -419,13 +421,13 @@ static int stbi_write_tga_core(stbi__write_context *s, int x, int y, int comp, v
}
if (diff) {
unsigned char header = (unsigned char) (len - 1);
unsigned char header = STBIW_UCHAR(len - 1);
s->func(s->context, &header, 1);
for (k = 0; k < len; ++k) {
stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin + k * comp);
}
} else {
unsigned char header = (unsigned char) (len - 129);
unsigned char header = STBIW_UCHAR(len - 129);
s->func(s->context, &header, 1);
stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin);
}
@ -481,7 +483,7 @@ void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear)
void stbiw__write_run_data(stbi__write_context *s, int length, unsigned char databyte)
{
unsigned char lengthbyte = (unsigned char) (length+128);
unsigned char lengthbyte = STBIW_UCHAR(length+128);
STBIW_ASSERT(length+128 <= 255);
s->func(s->context, &lengthbyte, 1);
s->func(s->context, &databyte, 1);
@ -489,7 +491,7 @@ void stbiw__write_run_data(stbi__write_context *s, int length, unsigned char dat
void stbiw__write_dump_data(stbi__write_context *s, int length, unsigned char *data)
{
unsigned char lengthbyte = (unsigned char )(length & 0xff);
unsigned char lengthbyte = STBIW_UCHAR(length);
STBIW_ASSERT(length <= 128); // inconsistent with spec but consistent with official code
s->func(s->context, &lengthbyte, 1);
s->func(s->context, data, length);
@ -660,7 +662,7 @@ static void *stbiw__sbgrowf(void **arr, int increment, int itemsize)
static unsigned char *stbiw__zlib_flushf(unsigned char *data, unsigned int *bitbuffer, int *bitcount)
{
while (*bitcount >= 8) {
stbiw__sbpush(data, (unsigned char) *bitbuffer);
stbiw__sbpush(data, STBIW_UCHAR(*bitbuffer));
*bitbuffer >>= 8;
*bitcount -= 8;
}
@ -804,10 +806,10 @@ unsigned char * stbi_zlib_compress(unsigned char *data, int data_len, int *out_l
j += blocklen;
blocklen = 5552;
}
stbiw__sbpush(out, (unsigned char) (s2 >> 8));
stbiw__sbpush(out, (unsigned char) s2);
stbiw__sbpush(out, (unsigned char) (s1 >> 8));
stbiw__sbpush(out, (unsigned char) s1);
stbiw__sbpush(out, STBIW_UCHAR(s2 >> 8));
stbiw__sbpush(out, STBIW_UCHAR(s2));
stbiw__sbpush(out, STBIW_UCHAR(s1 >> 8));
stbiw__sbpush(out, STBIW_UCHAR(s1));
}
*out_len = stbiw__sbn(out);
// make returned pointer freeable
@ -829,7 +831,7 @@ unsigned int stbiw__crc32(unsigned char *buffer, int len)
return ~crc;
}
#define stbiw__wpng4(o,a,b,c,d) ((o)[0]=(unsigned char)(a),(o)[1]=(unsigned char)(b),(o)[2]=(unsigned char)(c),(o)[3]=(unsigned char)(d),(o)+=4)
#define stbiw__wpng4(o,a,b,c,d) ((o)[0]=STBIW_UCHAR(a),(o)[1]=STBIW_UCHAR(b),(o)[2]=STBIW_UCHAR(c),(o)[3]=STBIW_UCHAR(d),(o)+=4)
#define stbiw__wp32(data,v) stbiw__wpng4(data, (v)>>24,(v)>>16,(v)>>8,(v));
#define stbiw__wptag(data,s) stbiw__wpng4(data, s[0],s[1],s[2],s[3])
@ -842,9 +844,9 @@ static void stbiw__wpcrc(unsigned char **data, int len)
static unsigned char stbiw__paeth(int a, int b, int c)
{
int p = a + b - c, pa = abs(p-a), pb = abs(p-b), pc = abs(p-c);
if (pa <= pb && pa <= pc) return (unsigned char) a;
if (pb <= pc) return (unsigned char) b;
return (unsigned char) c;
if (pa <= pb && pa <= pc) return STBIW_UCHAR(a);
if (pb <= pc) return STBIW_UCHAR(b);
return STBIW_UCHAR(c);
}
unsigned char *stbi_write_png_to_mem(unsigned char *pixels, int stride_bytes, int x, int y, int n, int *out_len)
@ -917,7 +919,7 @@ unsigned char *stbi_write_png_to_mem(unsigned char *pixels, int stride_bytes, in
stbiw__wp32(o, x);
stbiw__wp32(o, y);
*o++ = 8;
*o++ = (unsigned char) ctype[n];
*o++ = STBIW_UCHAR(ctype[n]);
*o++ = 0;
*o++ = 0;
*o++ = 0;