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Refactor zip file reading

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This commit is contained in:
Jukka Ojanen 2021-09-02 14:59:38 +03:00
parent b542d293b4
commit 63cc905bbc
1 changed files with 18 additions and 3 deletions
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21
src/filehandling.c
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@ -412,10 +412,25 @@ size_t hc_fread (void *ptr, size_t size, size_t nmemb, HCFILE *fp)
else if (fp->ufp)
{
u64 len = (u64) size * nmemb;
if (len == (unsigned) len)
u64 pos = 0;
/* assume success */
n = nmemb;
do
{
n = unzReadCurrentFile (fp->ufp, ptr, (unsigned) len);
}
unsigned chunk = (len > HCFILE_CHUNK_SIZE) ? HCFILE_CHUNK_SIZE : (unsigned) len;
int result = unzReadCurrentFile (fp->ufp, (unsigned char *) ptr + pos, chunk);
if (result < 0) return -1;
pos += (u64) result;
len -= (u64) result;
if (chunk != (unsigned) result)
{
/* partial read */
n = pos / size;
break;
}
} while (len);
}
else if (fp->xfp)
{