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Fix seekable decompression in-memory api

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This commit is contained in:
Sean Purcell
2019-07-21 23:22:25 -04:00
parent be3d2e2de8
commit 671d533ea7
3 changed files with 152 additions and 3 deletions
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4
contrib/seekable_format/zstdseek_decompress.c
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@ -106,7 +106,7 @@ typedef struct {
static int ZSTD_seekable_read_buff(void* opaque, void* buffer, size_t n)
{
buffWrapper_t* buff = (buffWrapper_t*) opaque;
if (buff->size + n > buff->pos) return -1;
if (buff->pos + n > buff->size) return -1;
memcpy(buffer, (const BYTE*)buff->ptr + buff->pos, n);
buff->pos += n;
return 0;
@ -124,7 +124,7 @@ static int ZSTD_seekable_seek_buff(void* opaque, long long offset, int origin)
newOffset = (unsigned long long)buff->pos + offset;
break;
case SEEK_END:
newOffset = (unsigned long long)buff->size - offset;
newOffset = (unsigned long long)buff->size + offset;
break;
default:
assert(0); /* not possible */