tinybson.h

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#ifndef _TINYBSON_H
#define _TINYBSON_H

#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>

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_nullptr = 10,
    BSON_INT32 = 16,
    BSON_INT64 = 18
} bson_type_t;

typedef enum bson_binary_subtype {
    BSON_BIN_BINARY = 0,
    BSON_BIN_USER = 128
} bson_binary_subtype_t;

#define BSON_MAXNAME        32

#define BSON_BUF_INCREMENT  128

typedef struct bson_node_s {
    char            name[BSON_MAXNAME];
    bson_type_t     type;
    bson_binary_subtype_t   subtype;
    union {
        int64_t     i;
        double      d;
        bool        b;
    };
} *bson_node_t;

typedef struct bson_decoder_s *bson_decoder_t;

typedef int (* bson_decoder_callback)(bson_decoder_t decoder, void *priv, bson_node_t node);

struct bson_decoder_s {
    /* file reader state */
    int         fd;

    /* buffer reader state */
    uint8_t         *buf;
    size_t          bufsize;
    unsigned        bufpos;

    bool            dead;
    bson_decoder_callback   callback;
    void            *priv;
    unsigned        nesting;
    struct bson_node_s  node;
    int32_t         pending;
};

__EXPORT int bson_decoder_init_file(bson_decoder_t decoder, int fd, bson_decoder_callback callback, void *priv);

__EXPORT int bson_decoder_init_buf(bson_decoder_t decoder, void *buf, unsigned bufsize, bson_decoder_callback callback,
                   void *priv);

__EXPORT int bson_decoder_next(bson_decoder_t decoder);

__EXPORT int bson_decoder_copy_data(bson_decoder_t decoder, void *buf);

__EXPORT size_t bson_decoder_data_pending(bson_decoder_t decoder);

typedef struct bson_encoder_s {
    /* file writer state */
    int     fd;

    /* buffer writer state */
    uint8_t     *buf;
    unsigned    bufsize;
    unsigned    bufpos;

    bool        realloc_ok;
    bool        dead;

} *bson_encoder_t;

__EXPORT int bson_encoder_init_file(bson_encoder_t encoder, int fd);

__EXPORT int bson_encoder_init_buf_file(bson_encoder_t encoder, int fd, void *buf, unsigned bufsize);

__EXPORT int bson_encoder_init_buf(bson_encoder_t encoder, void *buf, unsigned bufsize);

__EXPORT int bson_encoder_fini(bson_encoder_t encoder);

__EXPORT int bson_encoder_buf_size(bson_encoder_t encoder);

__EXPORT void *bson_encoder_buf_data(bson_encoder_t encoder);

__EXPORT int bson_encoder_append_bool(bson_encoder_t encoder, const char *name, bool value);

__EXPORT int bson_encoder_append_int(bson_encoder_t encoder, const char *name, int64_t value);

__EXPORT int bson_encoder_append_double(bson_encoder_t encoder, const char *name, double value);

__EXPORT int bson_encoder_append_string(bson_encoder_t encoder, const char *name, const char *string);

__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