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REVIEWED: sinfl external library to avoid ASAN complaints #3349

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This commit is contained in:
Ray 2023-11-06 19:30:00 +01:00
parent 8b2103fc77
commit 0a9bd393dc
1 changed files with 22 additions and 6 deletions
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28
src/external/sinfl.h vendored
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@ -122,6 +122,7 @@ extern "C" {
struct sinfl {
const unsigned char *bitptr;
const unsigned char *bitend; // @raysan5: added
unsigned long long bitbuf;
int bitcnt;
@ -185,9 +186,10 @@ sinfl_read64(const void *p) {
}
static void
sinfl_copy64(unsigned char **dst, unsigned char **src) {
unsigned long long n;
memcpy(&n, *src, 8);
memcpy(*dst, &n, 8);
//unsigned long long n;
//memcpy(&n, *src, 8);
//memcpy(*dst, &n, 8);
memcpy(*dst, *src, 8); // @raysan5
*dst += 8, *src += 8;
}
static unsigned char*
@ -210,9 +212,22 @@ sinfl_copy128(unsigned char **dst, unsigned char **src) {
#endif
static void
sinfl_refill(struct sinfl *s) {
s->bitbuf |= sinfl_read64(s->bitptr) << s->bitcnt;
s->bitptr += (63 - s->bitcnt) >> 3;
s->bitcnt |= 56; /* bitcount in range [56,63] */
if (s->bitend - s->bitptr >= 8) {
// @raysan5: original code, only those 3 lines
s->bitbuf |= sinfl_read64(s->bitptr) << s->bitcnt;
s->bitptr += (63 - s->bitcnt) >> 3;
s->bitcnt |= 56; /* bitcount in range [56,63] */
} else {
// @raysan5: added this case when bits remaining < 8
int bitswant = 63 - s->bitcnt;
int byteswant = bitswant >> 3;
int bytesuse = s->bitend - s->bitptr <= byteswant ? (int)(s->bitend - s->bitptr) : byteswant;
unsigned long long n = 0;
memcpy(&n, s->bitptr, bytesuse);
s->bitbuf |= n << s->bitcnt;
s->bitptr += bytesuse;
s->bitcnt += bytesuse << 3;
}
}
static int
sinfl_peek(struct sinfl *s, int cnt) {
@ -384,6 +399,7 @@ sinfl_decompress(unsigned char *out, int cap, const unsigned char *in, int size)
int last = 0;
s.bitptr = in;
s.bitend = e; // @raysan5: added
while (1) {
switch (state) {
case hdr: {