362 lines
9.9 KiB
C
362 lines
9.9 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_OBJECT,
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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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};
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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_OBJECT,
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MIO_JSON_INST_END_OBJECT,
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MIO_JSON_INST_KEY,
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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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mio_oow_t level,
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mio_oow_t index,
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mio_json_state_t container_state,
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const mio_oocs_t* str,
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void* ctx
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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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mio_oow_t level;
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mio_oow_t index;
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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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} io; /* in object */
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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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void* rctx;
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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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typedef struct mio_jsonwr_t mio_jsonwr_t;
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typedef int (*mio_jsonwr_writecb_t) (
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mio_jsonwr_t* jsonwr,
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const mio_bch_t* dptr,
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mio_oow_t dlen,
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void* ctx
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);
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typedef struct mio_jsonwr_state_node_t mio_jsonwr_state_node_t;
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struct mio_jsonwr_state_node_t
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{
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mio_json_state_t state;
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mio_oow_t level;
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mio_oow_t index;
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int obj_awaiting_val;
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mio_jsonwr_state_node_t* next;
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};
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enum mio_jsonwr_flag_t
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{
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MIO_JSONWR_FLAG_PRETTY = (1 << 0)
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};
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typedef enum mio_jsonwr_flag_t mio_jsonwr_flag_t;
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struct mio_jsonwr_t
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{
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mio_t* mio;
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mio_jsonwr_writecb_t writecb;
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mio_jsonwr_state_node_t state_top;
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mio_jsonwr_state_node_t* state_stack;
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int flags;
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void* wctx;
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mio_bch_t wbuf[8192];
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mio_oow_t wbuf_len;
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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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#if defined(MIO_HAVE_INLINE)
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static MIO_INLINE mio_t* mio_json_getmio (mio_json_t* json) { return json->mio; }
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#else
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# define mio_json_getmio(json) (((mio_json_t*)(json))->mio)
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#endif
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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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MIO_EXPORT void mio_json_setinstcb (
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mio_json_t* json,
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mio_json_instcb_t instcb,
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void* ctx
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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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MIO_EXPORT void mio_json_resetstates (
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mio_json_t* json
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);
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/**
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* The mio_json_feed() function processes the raw data.
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*
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* If stop_if_ever_complted is 0, it returns 0 on success. If the value pointed to by
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* rem is greater 0 after the call, processing is not complete and more feeding is
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* required. Incomplete feeding may be caused by incomplete byte sequences or incomplete
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* json object.
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*
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* If stop_if_ever_completed is non-zero, it returns 0 upon incomplet byte sequence or
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* incomplete json object. It returns 1 if it sees the first complete json object. It stores
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* the size of remaning raw data in the memory pointed to by rem.
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*
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* The function returns -1 upon failure.
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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* rem,
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int stop_if_ever_completed
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);
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/* ========================================================================= */
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MIO_EXPORT mio_jsonwr_t* mio_jsonwr_open (
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mio_t* mio,
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mio_oow_t xtnsize,
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int flags
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);
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MIO_EXPORT void mio_jsonwr_close (
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mio_jsonwr_t* jsonwr
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);
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MIO_EXPORT int mio_jsonwr_init (
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mio_jsonwr_t* jsonwr,
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mio_t* mio,
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int flags
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);
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MIO_EXPORT void mio_jsonwr_fini (
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mio_jsonwr_t* jsonwr
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);
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#if defined(MIO_HAVE_INLINE)
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static MIO_INLINE mio_t* mio_jsonwr_getmio (mio_jsonwr_t* jsonwr) { return jsonwr->mio; }
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#else
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# define mio_jsonwr_getmio(jsonwr) (((mio_jsonwr_t*)(jsonwr))->mio)
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#endif
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#if defined(MIO_HAVE_INLINE)
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static MIO_INLINE void* mio_jsonwr_getxtn (mio_jsonwr_t* jsonwr) { return (void*)(jsonwr + 1); }
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#else
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#define mio_jsonwr_getxtn(jsonwr) ((void*)((mio_jsonwr_t*)(jsonwr) + 1))
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#endif
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MIO_EXPORT void mio_jsonwr_setwritecb (
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mio_jsonwr_t* jsonwr,
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mio_jsonwr_writecb_t writecb,
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void* ctx
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);
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MIO_EXPORT int mio_jsonwr_write (
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mio_jsonwr_t* jsonwr,
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mio_json_inst_t inst,
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int is_uchars,
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const void* dptr,
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mio_oow_t dlen
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);
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#define mio_jsonwr_startarray(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_START_ARRAY, 0, MIO_NULL, 0)
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#define mio_jsonwr_endarray(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_END_ARRAY, 0, MIO_NULL, 0)
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#define mio_jsonwr_startobject(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_START_OBJECT, 0, MIO_NULL, 0)
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#define mio_jsonwr_endobject(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_END_OBJECT, 0, MIO_NULL, 0)
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#define mio_jsonwr_writenil(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_NIL, 0, MIO_NULL, 0)
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#define mio_jsonwr_writetrue(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_TRUE, 0, MIO_NULL, 0)
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#define mio_jsonwr_writefalse(jsonwr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_FALSE, 0, MIO_NULL, 0)
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#define mio_jsonwr_writekeywithuchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_KEY, 1, dptr, dlen)
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#define mio_jsonwr_writekeywithbchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_KEY, 0, dptr, dlen)
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#define mio_jsonwr_writekeywithucstr(jsonwr,dptr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_KEY, 1, dptr, mio_count_ucstr(dptr))
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#define mio_jsonwr_writekeywithbcstr(jsonwr,dptr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_KEY, 0, dptr, mio_count_bcstr(dptr))
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#define mio_jsonwr_writenumberwithuchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_NUMBER, 1, dptr, dlen)
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#define mio_jsonwr_writenumberwithbchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_NUMBER, 0, dptr, dlen)
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#define mio_jsonwr_writenumberwithucstr(jsonwr,dptr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_NUMBER, 1, dptr, mio_count_ucstr(dptr))
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#define mio_jsonwr_writenumberwithbcstr(jsonwr,dptr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_NUMBER, 0, dptr, mio_count_bcstr(dptr))
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#define mio_jsonwr_writestringwithuchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_STRING, 1, dptr, dlen)
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#define mio_jsonwr_writestringwithbchars(jsonwr,dptr,dlen) mio_jsonwr_write(jsonwr, MIO_JSON_INST_STRING, 0, dptr, dlen)
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#define mio_jsonwr_writestringwithucstr(jsonwr,dptr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_STRING, 1, dptr, mio_count_ucstr(dptr))
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#define mio_jsonwr_writestringwithbcstr(jsonwr,dptr) mio_jsonwr_write(jsonwr, MIO_JSON_INST_STRING, 0, dptr, mio_count_bcstr(dptr))
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MIO_EXPORT int mio_jsonwr_writeintmax (
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mio_jsonwr_t* jsonwr,
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mio_intmax_t v
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);
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MIO_EXPORT int mio_jsonwr_writeuintmax (
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mio_jsonwr_t* jsonwr,
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mio_uintmax_t v
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);
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MIO_EXPORT int mio_jsonwr_writerawuchars (
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mio_jsonwr_t* jsonwr,
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const mio_uch_t* dptr,
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mio_oow_t dlen
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);
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MIO_EXPORT int mio_jsonwr_writerawucstr (
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mio_jsonwr_t* jsonwr,
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const mio_uch_t* dptr
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);
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MIO_EXPORT int mio_jsonwr_writerawbchars (
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mio_jsonwr_t* jsonwr,
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const mio_bch_t* dptr,
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mio_oow_t dlen
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);
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MIO_EXPORT int mio_jsonwr_writerawbcstr (
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mio_jsonwr_t* jsonwr,
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const mio_bch_t* dptr
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);
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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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