static gint probe_buffer_fseek (VFSFile * file, gint64 offset, gint whence)
{
ProbeBuffer * p = file->handle;
if (whence == SEEK_END)
{
if (p->seek_warned != p->decoder)
{
fprintf (stderr, "%s tried to seek to end of file while probing "
"%s.\n", p->decoder, p->filename);
p->seek_warned = p->decoder;
}
return -1;
}
if (whence == SEEK_CUR)
offset += p->at;
g_return_val_if_fail (offset >= 0, -1);
increase_buffer (p, offset);
if (offset > p->filled)
return -1;
p->at = offset;
return 0;
}
static int64_t probe_buffer_fread (void * buffer, int64_t size, int64_t count,
VFSFile * file)
{
ProbeBuffer * p = vfs_get_handle (file);
increase_buffer (p, p->at + size * count);
int readed = (size > 0) ? MIN (count, (p->filled - p->at) / size) : 0;
memcpy (buffer, p->buffer + p->at, size * readed);
p->at += size * readed;
return readed;
}
static gint64 probe_buffer_fread (void * buffer, gint64 size, gint64 count,
VFSFile * file)
{
ProbeBuffer * p = file->handle;
increase_buffer (p, p->at + size * count);
gint readed = (size > 0) ? MIN (count, (p->filled - p->at) / size) : 0;
memcpy (buffer, p->buffer + p->at, size * readed);
p->at += size * readed;
return readed;
}
static int probe_buffer_fseek (VFSFile * file, int64_t offset, int whence)
{
ProbeBuffer * p = vfs_get_handle (file);
if (whence == SEEK_END)
return -1;
if (whence == SEEK_CUR)
offset += p->at;
g_return_val_if_fail (offset >= 0, -1);
increase_buffer (p, offset);
if (offset > p->filled)
return -1;
p->at = offset;
return 0;
}
