hyung-hwan/hio
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
25e3744571
hio/mio/lib/mio-json.h

306 lines
8.2 KiB
C
Raw Blame History

/*
* $Id$
*
Copyright (c) 2016-2020 Chung, Hyung-Hwan. 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.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR "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 AUTHOR 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.
*/
#ifndef _MIO_JSON_H_
#define _MIO_JSON_H_
#include <mio.h>
/**
* The mio_json_t type defines a simple json parser.
*/
typedef struct mio_json_t mio_json_t;
/* ========================================================================= */
enum mio_json_state_t
{
MIO_JSON_STATE_START,
MIO_JSON_STATE_IN_ARRAY,
MIO_JSON_STATE_IN_DIC,
MIO_JSON_STATE_IN_WORD_VALUE,
MIO_JSON_STATE_IN_NUMERIC_VALUE,
MIO_JSON_STATE_IN_STRING_VALUE
};
typedef enum mio_json_state_t mio_json_state_t;
/* ========================================================================= */
enum mio_json_inst_t
{
MIO_JSON_INST_START_ARRAY,
MIO_JSON_INST_END_ARRAY,
MIO_JSON_INST_START_DIC,
MIO_JSON_INST_END_DIC,
MIO_JSON_INST_KEY,
MIO_JSON_INST_STRING,
MIO_JSON_INST_NUMBER,
MIO_JSON_INST_NIL,
MIO_JSON_INST_TRUE,
MIO_JSON_INST_FALSE,
};
typedef enum mio_json_inst_t mio_json_inst_t;
typedef int (*mio_json_instcb_t) (
mio_json_t* json,
mio_json_inst_t inst,
mio_oow_t level,
const mio_oocs_t* str
);
typedef struct mio_json_state_node_t mio_json_state_node_t;
struct mio_json_state_node_t
{
mio_json_state_t state;
mio_oow_t level;
union
{
struct
{
int got_value;
} ia; /* in array */
struct
{
/* 0: ready to get key (at the beginning or got comma),
* 1: got key, 2: got colon, 3: got value */
int state;
} id; /* in dictionary */
struct
{
int escaped;
int digit_count;
/* acc is always of unicode type to handle \u and \U.
* in the bch mode, it will get converted to a utf8 stream. */
mio_uch_t acc;
} sv;
struct
{
int escaped;
int digit_count;
/* for a character, no way to support the unicode character
* in the bch mode */
mio_ooch_t acc;
} cv;
struct
{
int dotted;
} nv;
} u;
mio_json_state_node_t* next;
};
struct mio_json_t
{
mio_t* mio;
mio_json_instcb_t instcb;
mio_json_state_node_t state_top;
mio_json_state_node_t* state_stack;
mio_oocs_t tok;
mio_oow_t tok_capa;
};
/* ========================================================================= */
typedef struct mio_jsonwr_t mio_jsonwr_t;
typedef int (*mio_jsonwr_writecb_t) (
mio_jsonwr_t* jsonwr,
/*mio_oow_t level,*/
const mio_bch_t* dptr,
mio_oow_t dlen
);
typedef struct mio_jsonwr_state_node_t mio_jsonwr_state_node_t;
struct mio_jsonwr_state_node_t
{
mio_json_state_t state;
mio_oow_t level;
mio_oow_t index;
int dic_awaiting_val;
mio_jsonwr_state_node_t* next;
};
struct mio_jsonwr_t
{
mio_t* mio;
mio_jsonwr_writecb_t writecb;
mio_jsonwr_state_node_t state_top;
mio_jsonwr_state_node_t* state_stack;
int pretty;
mio_bch_t wbuf[8192];
mio_oow_t wbuf_len;
};
/* ========================================================================= */
#if defined(__cplusplus)
extern "C" {
#endif
MIO_EXPORT mio_json_t* mio_json_open (
mio_t* mio,
mio_oow_t xtnsize
);
MIO_EXPORT void mio_json_close (
mio_json_t* json
);
MIO_EXPORT int mio_json_init (
mio_json_t* json,
mio_t* mio
);
MIO_EXPORT void mio_json_fini (
mio_json_t* json
);
#if defined(MIO_HAVE_INLINE)
static MIO_INLINE mio_t* mio_json_getmio (mio_json_t* json) { return json->mio; }
#else
# define mio_json_getmio(json) (((mio_json_t*)(json))->mio)
#endif
#if defined(MIO_HAVE_INLINE)
static MIO_INLINE void* mio_json_getxtn (mio_json_t* json) { return (void*)(json + 1); }
#else
#define mio_json_getxtn(json) ((void*)((mio_json_t*)(json) + 1))
#endif
MIO_EXPORT void mio_json_setinstcb (
mio_json_t* json,
mio_json_instcb_t instcb
);
MIO_EXPORT mio_json_state_t mio_json_getstate (
mio_json_t* json
);
MIO_EXPORT void mio_json_resetstates (
mio_json_t* json
);
/**
* The mio_json_feed() function processes the raw data.
*
* If stop_if_ever_complted is 0, it returns 0 on success. If the value pointed to by
* rem is greater 0 after the call, processing is not complete and more feeding is
* required. Incomplete feeding may be caused by incomplete byte sequences or incomplete
* json object.
*
* If stop_if_ever_completed is non-zero, it returns 0 upon incomplet byte sequence or
* incomplete json object. It returns 1 if it sees the first complete json object. It stores
* the size of remaning raw data in the memory pointed to by rem.
*
* The function returns -1 upon failure.
*/
MIO_EXPORT int mio_json_feed (
mio_json_t* json,
const void* ptr,
mio_oow_t len,
mio_oow_t* rem,
int stop_if_ever_completed
);
/* ========================================================================= */
MIO_EXPORT mio_jsonwr_t* mio_jsonwr_open (
mio_t* mio,
mio_oow_t xtnsize
);
MIO_EXPORT void mio_jsonwr_close (
mio_jsonwr_t* jsonwr
);
MIO_EXPORT int mio_jsonwr_init (
mio_jsonwr_t* jsonwr,
mio_t* mio
);
MIO_EXPORT void mio_jsonwr_fini (
mio_jsonwr_t* jsonwr
);
#if defined(MIO_HAVE_INLINE)
static MIO_INLINE mio_t* mio_jsonwr_getmio (mio_jsonwr_t* jsonwr) { return jsonwr->mio; }
#else
# define mio_jsonwr_getmio(jsonwr) (((mio_jsonwr_t*)(jsonwr))->mio)
#endif
#if defined(MIO_HAVE_INLINE)
static MIO_INLINE void* mio_jsonwr_getxtn (mio_jsonwr_t* jsonwr) { return (void*)(jsonwr + 1); }
#else
#define mio_jsonwr_getxtn(jsonwr) ((void*)((mio_jsonwr_t*)(jsonwr) + 1))
#endif
MIO_EXPORT void mio_jsonwr_setwritecb (
mio_jsonwr_t* jsonwr,
mio_jsonwr_writecb_t writecb
);
MIO_EXPORT int mio_jsonwr_write (
mio_jsonwr_t* jsonwr,
mio_json_inst_t inst,
int is_uchars,
const void* dptr,
mio_oow_t dlen
);
#define mio_jsonwr_startarray(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_START_ARRAY, 0, MIO_NULL, 0)
#define mio_jsonwr_endarray(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_END_ARRAY, 0, MIO_NULL, 0)
#define mio_jsonwr_startdic(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_START_DIC, 0, MIO_NULL, 0)
#define mio_jsonwr_enddic(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_END_DIC, 0, MIO_NULL, 0)
#define mio_jsonwr_writenil(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_NIL, 0, MIO_NULL, 0)
#define mio_jsonwr_writetrue(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_TRUE, 0, MIO_NULL, 0)
#define mio_jsonwr_writefalse(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_FALSE, 0, MIO_NULL, 0)
#define mio_jsonwr_writekeywithuchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_KEY, 1, dptr, dlen)
#define mio_jsonwr_writekeywithbchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_KEY, 0, dptr, dlen)
#define mio_jsonwr_writenumberwithuchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_NUMBER, 1, dptr, dlen)
#define mio_jsonwr_writenumberwithbchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_NUMBER, 0, dptr, dlen)
#define mio_jsonwr_writestringwithuchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_STRING, 1, dptr, dlen)
#define mio_jsonwr_writestringwithbchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_STRING, 0, dptr, dlen)
#if defined(__cplusplus)
}
#endif
#endif
Reference in New Issue View Git Blame Copy Permalink