181 lines
4.2 KiB
C
181 lines
4.2 KiB
C
/*
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* $Id$
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*
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Copyright (c) 2016-2020 Chung, Hyung-Hwan. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MIO_JSON_H_
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#define _MIO_JSON_H_
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#include <mio.h>
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/**
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* The mio_json_t type defines a simple json parser.
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*/
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typedef struct mio_json_t mio_json_t;
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/* ========================================================================= */
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enum mio_json_state_t
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{
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MIO_JSON_STATE_START,
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MIO_JSON_STATE_IN_ARRAY,
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MIO_JSON_STATE_IN_DIC,
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MIO_JSON_STATE_IN_WORD_VALUE,
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MIO_JSON_STATE_IN_NUMERIC_VALUE,
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MIO_JSON_STATE_IN_STRING_VALUE,
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MIO_JSON_STATE_IN_CHARACTER_VALUE
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};
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typedef enum mio_json_state_t mio_json_state_t;
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/* ========================================================================= */
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enum mio_json_inst_t
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{
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MIO_JSON_INST_START_ARRAY,
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MIO_JSON_INST_END_ARRAY,
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MIO_JSON_INST_START_DIC,
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MIO_JSON_INST_END_DIC,
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MIO_JSON_INST_KEY,
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MIO_JSON_INST_CHARACTER, /* there is no such element as character in real JSON */
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MIO_JSON_INST_STRING,
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MIO_JSON_INST_NUMBER,
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MIO_JSON_INST_NIL,
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MIO_JSON_INST_TRUE,
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MIO_JSON_INST_FALSE,
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};
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typedef enum mio_json_inst_t mio_json_inst_t;
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typedef int (*mio_json_instcb_t) (
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mio_json_t* json,
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mio_json_inst_t inst,
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const mio_oocs_t* str
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);
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typedef struct mio_json_state_node_t mio_json_state_node_t;
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struct mio_json_state_node_t
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{
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mio_json_state_t state;
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union
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{
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struct
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{
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int got_value;
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} ia; /* in array */
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struct
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{
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/* 0: ready to get key (at the beginning or got comma),
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* 1: got key, 2: got colon, 3: got value */
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int state;
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} id; /* in dictionary */
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struct
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{
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int escaped;
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int digit_count;
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/* acc is always of unicode type to handle \u and \U.
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* in the bch mode, it will get converted to a utf8 stream. */
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mio_uch_t acc;
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} sv;
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struct
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{
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int escaped;
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int digit_count;
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/* for a character, no way to support the unicode character
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* in the bch mode */
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mio_ooch_t acc;
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} cv;
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struct
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{
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int dotted;
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} nv;
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} u;
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mio_json_state_node_t* next;
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};
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struct mio_json_t
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{
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mio_t* mio;
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mio_json_instcb_t instcb;
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mio_json_state_node_t state_top;
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mio_json_state_node_t* state_stack;
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mio_oocs_t tok;
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mio_oow_t tok_capa;
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};
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/* ========================================================================= */
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#if defined(__cplusplus)
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extern "C" {
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#endif
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MIO_EXPORT mio_json_t* mio_json_open (
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mio_t* mio,
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mio_oow_t xtnsize
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);
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MIO_EXPORT void mio_json_close (
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mio_json_t* json
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);
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MIO_EXPORT int mio_json_init (
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mio_json_t* json,
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mio_t* mio
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);
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MIO_EXPORT void mio_json_fini (
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mio_json_t* json
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);
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MIO_EXPORT void mio_json_reset (
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mio_json_t* json
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);
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MIO_EXPORT int mio_json_feed (
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mio_json_t* json,
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const void* ptr,
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mio_oow_t len,
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mio_oow_t* xlen
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);
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MIO_EXPORT mio_json_state_t mio_json_getstate (
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mio_json_t* json
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);
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#if defined(MIO_HAVE_INLINE)
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static MIO_INLINE void* mio_json_getxtn (mio_json_t* json) { return (void*)(json + 1); }
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#else
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#define mio_json_getxtn(json) ((void*)((mio_json_t*)(json) + 1))
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#endif
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#if defined(__cplusplus)
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}
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#endif
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#endif
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