First version of decoding

git-svn-id: https://svn.kapsi.fi/jpa/nanopb@942 e3a754e5-d11d-0410-8d38-ebb782a927b9

1 files changed, 55 insertions, 0 deletions

diff --git a/pb_decode.h b/pb_decode.h
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+++ b/pb_decode.h
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+#ifndef _PB_DECODE_H_
+#define _PB_DECODE_H_
+
+#include <stdbool.h>
+#include "pb.h"
+
+// Decode from stream to destination struct.
+// The actual struct pointed to by dest must match the description in fields.
+bool pb_decode(pb_istream_t *stream, const pb_field_t fields[], void *dest);
+
+/* --- Helper functions ---
+ * You may want to use these from your callbacks.
+ */
+
+bool pb_decode_varint32(pb_istream_t *stream, uint32_t *dest);
+bool pb_decode_varint64(pb_istream_t *stream, uint64_t *dest);
+
+bool pb_skip_varint(pb_istream_t *stream);
+bool pb_skip_string(pb_istream_t *stream);
+
+/* --- Field decoders ---
+ * Each decoder takes stream and field description, and a pointer to the field
+ * in the destination struct (dest = struct_addr + field->offset).
+ */
+
+// Integer types.
+bool pb_dec_uint32(pb_istream_t *stream, const pb_field_t *field, void *dest);
+bool pb_dec_sint32(pb_istream_t *stream, const pb_field_t *field, void *dest);
+bool pb_dec_fixed32(pb_istream_t *stream, const pb_field_t *field, void *dest);
+bool pb_dec_uint64(pb_istream_t *stream, const pb_field_t *field, void *dest);
+bool pb_dec_sint64(pb_istream_t *stream, const pb_field_t *field, void *dest);
+bool pb_dec_fixed64(pb_istream_t *stream, const pb_field_t *field, void *dest);
+bool pb_dec_bool(pb_istream_t *stream, const pb_field_t *field, void *dest);
+
+// Floating point types. Info is ignored.
+bool pb_dec_float(pb_istream_t *stream, const pb_field_t *field, void *dest);
+bool pb_dec_double(pb_istream_t *stream, const pb_field_t *field, void *dest);
+
+// Byte array. Dest is pointer to 
+bool pb_dec_bytes(pb_istream_t *stream, const pb_field_t *field, void *dest);
+
+// Null-terminated string.
+bool pb_dec_string(pb_istream_t *stream, const pb_field_t *field, void *dest);
+
+// Use callback. Dest is pointer to pb_callback_t struct.
+bool pb_dec_submessage(pb_istream_t *stream, const pb_field_t *field, void *dest);
+
+typedef bool (*pb_decoder_t)(pb_istream_t *stream, const pb_field_t *field, void *dest);
+
+/* --- Function pointers to field decoders ---
+ * Order in the array must match pb_action_t numbering.
+ */
+const pb_decoder_t PB_DECODERS[PB_LAST_ACT];
+
+#endif