size_t LLHTTPAssetRequest::readCompressedData(void* data, size_t size)
{
mZStream.next_out = (Bytef*)data;
mZStream.avail_out = size;
while (mZStream.avail_out > 0)
{
if (mZStream.avail_in == 0 && !mZInputExhausted)
{
S32 to_read = llmin(COMPRESSED_INPUT_BUFFER_SIZE,
(S32)(mVFile->getSize() - mVFile->tell()));
mVFile->read((U8*)mZInputBuffer, to_read); /*Flawfinder: ignore*/
mZStream.next_in = (Bytef*)mZInputBuffer;
mZStream.avail_in = mVFile->getLastBytesRead();
mZInputExhausted = mZStream.avail_in == 0;
}
int r = deflate(&mZStream,
mZInputExhausted ? Z_FINISH : Z_NO_FLUSH);
if (r == Z_STREAM_END)
{
break;
}
}
return size - mZStream.avail_out;
}
int vfs_seek(void *datasource, ogg_int64_t offset, int whence)
{
LLVFile *file = (LLVFile *)datasource;
// vfs has 31-bit files
if (offset > S32_MAX)
{
return -1;
}
S32 origin;
switch (whence) {
case SEEK_SET:
origin = 0;
break;
case SEEK_END:
origin = file->getSize();
break;
case SEEK_CUR:
origin = -1;
break;
default:
llerrs << "Invalid whence argument to vfs_seek" << llendl;
return -1;
}
if (file->seek((S32)offset, origin))
{
return 0;
}
else
{
return -1;
}
}
size_t vfs_read(void *ptr, size_t size, size_t nmemb, void *datasource)
{
LLVFile *file = (LLVFile *)datasource;
if (size > 0 && file->read((U8*)ptr, size * nmemb)) /*Flawfinder: ignore*/
{
S32 read = file->getLastBytesRead();
return read / size; /*Flawfinder: ignore*/
}
else
{
return 0;
}
}
long vfs_tell (void *datasource)
{
LLVFile *file = (LLVFile *)datasource;
return file->tell();
}
