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#ifndef SNDFILE_FUZZ_HEADER_H
#define SNDFILE_FUZZ_HEADER_H
typedef struct
{
sf_count_t offset ;
sf_count_t length ;
const unsigned char *data ;
} VIO_DATA ;
static sf_count_t vfget_filelen (void *user_data)
{ VIO_DATA *vf = (VIO_DATA *)user_data ;
return vf->length ;
}
static sf_count_t vfseek (sf_count_t offset, int whence, void *user_data)
{
VIO_DATA *vf = (VIO_DATA *)user_data ;
sf_count_t new_offset ;
switch (whence)
{ case SEEK_SET :
new_offset = offset ;
break ;
case SEEK_CUR :
new_offset = vf->offset + offset ;
break ;
case SEEK_END :
new_offset = vf->length + offset ;
break ;
default :
break ;
}
/* Ensure you can't seek outside the data */
if (new_offset > vf->length)
{ /* Trying to seek past the end of the data */
printf("vf overseek: new_offset(%" PRId64 ") > vf->length(%" PRId64 ");"
" whence(%d), vf->offset(%" PRId64 "), offset(%" PRId64 ")\n",
new_offset, vf->length, whence, vf->offset, offset) ;
new_offset = vf->length ;
}
else if (new_offset < 0)
{ /* Trying to seek before the start of the data */
printf("vf underseek: new_offset(%" PRId64 ") < 0; whence(%d), vf->offset"
"(%" PRId64 "), vf->length(%" PRId64 "), offset(%" PRId64 ")\n",
new_offset, whence, vf->offset, vf->length, offset) ;
new_offset = 0 ;
}
vf->offset = new_offset ;
return vf->offset ;
}
static sf_count_t vfread (void *ptr, sf_count_t count, void *user_data)
{ VIO_DATA *vf = (VIO_DATA *)user_data ;
if (vf->offset + count > vf->length)
count = vf->length - vf->offset ;
memcpy(ptr, vf->data + vf->offset, count) ;
vf->offset += count ;
return count ;
}
static sf_count_t vfwrite (const void *ptr, sf_count_t count, void *user_data)
{
(void)ptr ;
(void)count ;
(void)user_data ;
// Cannot write to this virtual file.
return 0;
}
static sf_count_t vftell (void *user_data)
{ VIO_DATA *vf = (VIO_DATA *)user_data ;
return vf->offset ;
}
int sf_init_file(const uint8_t *data,
size_t size,
SNDFILE **sndfile,
VIO_DATA *vio_data,
SF_VIRTUAL_IO *vio, SF_INFO *sndfile_info)
{ float* read_buffer = NULL ;
// Initialize the virtual IO structure.
vio->get_filelen = vfget_filelen ;
vio->seek = vfseek ;
vio->read = vfread ;
vio->write = vfwrite ;
vio->tell = vftell ;
// Initialize the VIO user data.
vio_data->data = data ;
vio_data->length = size ;
vio_data->offset = 0 ;
memset(sndfile_info, 0, sizeof(SF_INFO)) ;
// Try and open the virtual file.
*sndfile = sf_open_virtual(vio, SFM_READ, sndfile_info, vio_data) ;
if (sndfile_info->channels == 0)
return -1 ;
if (sndfile_info->channels > 1024 * 1024)
return -1 ;
return 0;
}
#endif
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