ssize_t exfat_pread(struct exfat_dev* dev, void* buffer, size_t size,
off_t offset)
{
#ifdef USE_UBLIO
return ublio_pread(dev->ufh, buffer, size, offset);
#else
return pread(dev->fd, buffer, size, offset);
#endif
}
ssize_t exfat_pread(struct exfat_dev* dev, void* buffer, size_t size,
off64_t offset)
{
#ifdef USE_UBLIO
return ublio_pread(dev->ufh, buffer, size, offset);
#elif defined(USE_TRANSITIONAL_LFS) && USE_TRANSITIONAL_LFS
return pread64(dev->fd, buffer, size, offset);
#else
return pread(dev->fd, buffer, size, offset);
#endif
}
ssize_t exfat_read(struct exfat_dev* dev, void* buffer, size_t size)
{
#ifdef USE_UBLIO
ssize_t result = ublio_pread(dev->ufh, buffer, size, dev->pos);
if (result >= 0)
dev->pos += size;
return result;
#else
return read(dev->fd, buffer, size);
#endif
}
void exfat_pread(struct exfat_dev* dev, void* buffer, size_t size,
off_t offset)
{
#ifdef USE_UBLIO
if (ublio_pread(dev->ufh, buffer, size, offset) != size)
#else
if (pread(dev->fd, buffer, size, offset) != size)
#endif
exfat_bug("failed to read %zu bytes from file at %"PRIu64, size,
(uint64_t) offset);
}