static size_t read_stdio(STDIOSTREAMFILE *streamfile,uint8_t * dest, off_t offset, size_t length) {
if (!streamfile || !dest || length<=0)
return 0;
/* request outside file: ignore to avoid seek/read in read_the_rest() */
if (offset > streamfile->filesize) {
streamfile->offset = streamfile->filesize;
VGM_LOG_ONCE("ERROR: offset over filesize 0x%x @ 0x%lx + 0x%x (buggy meta?)\n", streamfile->filesize, offset, length);
#if STREAMFILE_IGNORE_EOF
memset(dest,0,length);
return length; /* 0-set buffer */
#else
return 0; /* nothing to read */
#endif
}
/* just copy if entire request is within the buffer */
if (offset >= streamfile->offset && offset + length <= streamfile->offset + streamfile->validsize) {
off_t offset_into_buffer = offset - streamfile->offset;
memcpy(dest,streamfile->buffer + offset_into_buffer,length);
return length;
}
/* request outside buffer: new fread */
{
size_t length_read = read_the_rest(dest,offset,length,streamfile);
#ifdef PROFILE_STREAMFILE
if (length_read < length)
streamfile->error_count++;
#endif
return length_read;
}
}
static size_t read_stdio(STDIOSTREAMFILE *streamfile,uint8_t * dest, off_t offset, size_t length)
{
// read
if (!streamfile || !dest || length<=0) return 0;
/* if entire request is within the buffer */
if (offset >= streamfile->offset && offset+length <= streamfile->offset+streamfile->validsize) {
memcpy(dest,streamfile->buffer+(offset-streamfile->offset),length);
return length;
}
{
size_t length_read = read_the_rest(dest,offset,length,streamfile);
#if PROFILE_STREAMFILE
if (length_read < length)
streamfile->error_count++;
#endif
return length_read;
}
}
