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Diffstat (limited to 'apps/systemlib/bson/tinybson.h')
-rw-r--r-- | apps/systemlib/bson/tinybson.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/apps/systemlib/bson/tinybson.h b/apps/systemlib/bson/tinybson.h new file mode 100644 index 000000000..05bae007b --- /dev/null +++ b/apps/systemlib/bson/tinybson.h @@ -0,0 +1,169 @@ +/**************************************************************************** + * + * Copyright (C) 2012 PX4 Development Team. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name PX4 nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + + /** + * @file tinybson.h + * + * A simple subset SAX-style BSON parser and generator. + * + * Some types and defines taken from the standalone BSON parser/generator + * in the Mongo C connector. + */ + +#ifndef _TINYBSON_H +#define _TINYBSON_H + +#include <sys/types.h> +#include <stdint.h> +#include <stdbool.h> + +/** subset of the BSON node types we might care about */ +typedef enum { + BSON_EOO = 0, + BSON_DOUBLE = 1, + BSON_STRING = 2, + BSON_OBJECT = 3, + BSON_ARRAY = 4, + BSON_BINDATA = 5, + BSON_UNDEFINED = 6, + BSON_BOOL = 8, + BSON_DATE = 9, + BSON_NULL = 10, + BSON_INT = 16, + BSON_TIMESTAMP = 17, + BSON_LONG = 18 +} bson_type_t; + +typedef enum bson_binary_subtype { + BSON_BIN_BINARY = 0, + BSON_BIN_USER = 128 +} bson_binary_subtype_t; + +/** + * Maximum node name length. + */ +#define BSON_MAXNAME 32 + +/** + * Node structure passed to the callback. + */ +typedef struct bson_node_s +{ + char name[BSON_MAXNAME]; + bson_type_t type; + bson_binary_subtype_t subtype; + union { + int32_t i; + double d; + bool b; + }; +} *bson_node_t; + +typedef struct bson_decoder_s *bson_decoder_t; + +/** + * Node callback. + */ +typedef int (* bson_decoder_callback)(bson_decoder_t decoder, void *private, bson_node_t node); + +struct bson_decoder_s +{ + int fd; + bson_decoder_callback callback; + void *private; + unsigned nesting; + struct bson_node_s node; + int32_t pending; +}; + +/** + * Initialise the decoder. + */ +__EXPORT int bson_decoder_init(bson_decoder_t decoder, int fd, bson_decoder_callback callback, void *private); + +/** + * Process the next node from the stream and invoke the callback. + */ +__EXPORT int bson_decoder_next(bson_decoder_t decoder); + +/** + * Copy node data. + */ +__EXPORT int bson_decoder_copy_data(bson_decoder_t decoder, void *buf); + +/** + * Report copyable data size. + */ +__EXPORT size_t bson_decoder_data_pending(bson_decoder_t decoder); + +/** + * Encoder state structure. + */ +typedef struct bson_encoder_s +{ + int fd; + +} *bson_encoder_t; + +/** + * Initialze the encoder. + */ +__EXPORT int bson_encoder_init(bson_encoder_t encoder, int fd); + +/** + * Finalise the encoded stream. + */ +__EXPORT int bson_encoder_fini(bson_encoder_t encoder); + +/** + * Append an integer to the encoded stream. + */ +__EXPORT int bson_encoder_append_int(bson_encoder_t encoder, const char *name, int32_t value); + +/** + * Append a double to the encoded stream + */ +__EXPORT int bson_encoder_append_double(bson_encoder_t encoder, const char *name, double value); + +/** + * Append a string to the encoded stream. + */ +__EXPORT int bson_encoder_append_string(bson_encoder_t encoder, const char *name, const char *string); + +/** + * Append a binary blob to the encoded stream. + */ +__EXPORT int bson_encoder_append_binary(bson_encoder_t encoder, const char *name, bson_binary_subtype_t subtype, size_t size, const void *data); + + +#endif |