*
* 3) You can use state to store your own data (e.g. buffer pointer),
* and rely on pb_read to verify that no-body reads past bytes_left.
+ *
+ * 4) Your callback may be used with substreams, in which case bytes_left
+ * is different than from the main stream. Don't use bytes_left to compute
+ * any pointers.
*/
struct _pb_istream_t
{
bool (*callback)(pb_istream_t *stream, uint8_t *buf, size_t count);
void *state; /* Free field for use by callback implementation */
size_t bytes_left;
+
+#ifndef PB_NO_ERRMSG
+ const char *errmsg;
+#endif
};
pb_istream_t pb_istream_from_buffer(uint8_t *buf, size_t bufsize);
*/
bool pb_decode(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct);
+/* Same as pb_decode, except does not initialize the destination structure
+ * to default values. This is slightly faster if you need no default values
+ * and just do memset(struct, 0, sizeof(struct)) yourself.
+ */
+bool pb_decode_noinit(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct);
+
/* --- Helper functions ---
* You may want to use these from your caller or callbacks.
*/
/* Make a limited-length substream for reading a PB_WT_STRING field. */
bool pb_make_string_substream(pb_istream_t *stream, pb_istream_t *substream);
+void pb_close_string_substream(pb_istream_t *stream, pb_istream_t *substream);
/* --- Internal functions ---
* These functions are not terribly useful for the average library user, but