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fix(file): large file process

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源文雨
2024-04-05 02:03:25 +09:00
parent cde0cacd07
commit 4b4993d66d
5 changed files with 128 additions and 82 deletions
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53
binary.h
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@@ -87,4 +87,57 @@
// leftrotate function definition
#define LEFTROTATE(x, c) (((x) << (c)) | ((x) >> (sizeof(x)*8 - (c))))
static inline uint32_t calc_sum(uint32_t sum, size_t cnt, char* encbuf) {
uint32_t i;
#ifdef DEBUG
fprintf(stderr, "cnt: %zu, roundin: %08x, ", cnt, sum);
#endif
for(i = 0; i < cnt/sizeof(sum); i++) {
#ifdef DEBUG
if (!i) {
fprintf(stderr, "firstval: %08x, ", htobe32(((uint32_t*)encbuf)[i]));
}
#endif
sum += ~LEFTROTATE(htobe32(((uint32_t*)encbuf)[i]), encbuf[i*sizeof(sum)]%(8*sizeof(sum)));
}
#ifdef DEBUG
fprintf(stderr, "roundmid: %08x", sum);
#endif
size_t rem = cnt % sizeof(sum);
if(rem) {
uint32_t x = htobe32(((uint32_t*)encbuf)[i]) & (0xffffffff << (8*(sizeof(sum)-rem)));
sum += ~LEFTROTATE(x, encbuf[i*sizeof(sum)]%(8*sizeof(sum)));
#ifdef DEBUG
fprintf(stderr, ", roundrem:%08x\n", sum);
#endif
}
#ifdef DEBUG
else fprintf(stderr, "\n");
#endif
return sum;
}
static inline uint32_t calc_and_embed_sum(uint32_t sum, size_t cnt, char* encbuf) {
sum = calc_sum(sum, cnt, encbuf);
if(cnt%7) { // last encode
*(uint32_t*)(&encbuf[cnt]) = htobe32(sum);
}
return sum;
}
static inline int calc_and_check_sum(uint32_t* s, size_t cnt, char* encbuf) {
uint32_t sum = calc_sum(*s, cnt, encbuf);
if(cnt%7) { // is last decode block
int shift = (int[]){0, 26, 20, 28, 22, 30, 24}[cnt%7];
uint32_t sum_read = be32toh((*(uint32_t*)(&encbuf[cnt]))) >> shift;
sum >>= shift;
#ifdef DEBUG
fprintf(stderr, "cntrm: %lu, mysum: %08x, sumrd: %08x\n", cnt%7, sum, sum_read);
#endif
return sum != sum_read;
}
*s = sum;
return 0;
}
#endif