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-rw-r--r--src/jsmn.c280
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diff --git a/src/jsmn.c b/src/jsmn.c
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-/*
- * jsmn.c
- * Simple JSON parser
- *
- * Copyright (c) 2010 Serge A. Zaitsev
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include <stdlib.h>
-
-#include "jsmn.h"
-
-/**
- * Allocates a fresh unused token from the token pull.
- */
-static jsmntok_t *jsmn_alloc_token(jsmn_parser *parser,
- jsmntok_t *tokens, size_t num_tokens) {
- jsmntok_t *tok;
- if (parser->toknext >= num_tokens) {
- return NULL;
- }
- tok = &tokens[parser->toknext++];
- tok->start = tok->end = -1;
- tok->size = 0;
-#ifdef JSMN_PARENT_LINKS
- tok->parent = -1;
-#endif
- return tok;
-}
-
-/**
- * Fills token type and boundaries.
- */
-static void jsmn_fill_token(jsmntok_t *token, jsmntype_t type,
- int start, int end) {
- token->type = type;
- token->start = start;
- token->end = end;
- token->size = 0;
-}
-
-/**
- * Fills next available token with JSON primitive.
- */
-static jsmnerr_t jsmn_parse_primitive(jsmn_parser *parser, const char *js,
- jsmntok_t *tokens, size_t num_tokens) {
- jsmntok_t *token;
- int start;
-
- start = parser->pos;
-
- for (; js[parser->pos] != '\0'; parser->pos++) {
- switch (js[parser->pos]) {
-#ifndef JSMN_STRICT
- /* In strict mode primitive must be followed by "," or "}" or "]" */
- case ':':
-#endif
- case '\t' : case '\r' : case '\n' : case ' ' :
- case ',' : case ']' : case '}' :
- goto found;
- }
- if (js[parser->pos] < 32 || js[parser->pos] >= 127) {
- parser->pos = start;
- return JSMN_ERROR_INVAL;
- }
- }
-#ifdef JSMN_STRICT
- /* In strict mode primitive must be followed by a comma/object/array */
- parser->pos = start;
- return JSMN_ERROR_PART;
-#endif
-
-found:
- token = jsmn_alloc_token(parser, tokens, num_tokens);
- if (token == NULL) {
- parser->pos = start;
- return JSMN_ERROR_NOMEM;
- }
- jsmn_fill_token(token, JSMN_PRIMITIVE, start, parser->pos);
-#ifdef JSMN_PARENT_LINKS
- token->parent = parser->toksuper;
-#endif
- parser->pos--;
- return JSMN_SUCCESS;
-}
-
-/**
- * Filsl next token with JSON string.
- */
-static jsmnerr_t jsmn_parse_string(jsmn_parser *parser, const char *js,
- jsmntok_t *tokens, size_t num_tokens) {
- jsmntok_t *token;
-
- int start = parser->pos;
-
- parser->pos++;
-
- /* Skip starting quote */
- for (; js[parser->pos] != '\0'; parser->pos++) {
- char c = js[parser->pos];
-
- /* Quote: end of string */
- if (c == '\"') {
- token = jsmn_alloc_token(parser, tokens, num_tokens);
- if (token == NULL) {
- parser->pos = start;
- return JSMN_ERROR_NOMEM;
- }
- jsmn_fill_token(token, JSMN_STRING, start+1, parser->pos);
-#ifdef JSMN_PARENT_LINKS
- token->parent = parser->toksuper;
-#endif
- return JSMN_SUCCESS;
- }
-
- /* Backslash: Quoted symbol expected */
- if (c == '\\') {
- parser->pos++;
- switch (js[parser->pos]) {
- /* Allowed escaped symbols */
- case '\"': case '/' : case '\\' : case 'b' :
- case 'f' : case 'r' : case 'n' : case 't' :
- break;
- /* Allows escaped symbol \uXXXX */
- case 'u':
- /* TODO */
- break;
- /* Unexpected symbol */
- default:
- parser->pos = start;
- return JSMN_ERROR_INVAL;
- }
- }
- }
- parser->pos = start;
- return JSMN_ERROR_PART;
-}
-
-/**
- * Parse JSON string and fill tokens.
- */
-jsmnerr_t jsmn_parse(jsmn_parser *parser, const char *js, jsmntok_t *tokens,
- unsigned int num_tokens) {
- jsmnerr_t r;
- int i;
- jsmntok_t *token;
-
- for (; js[parser->pos] != '\0'; parser->pos++) {
- char c;
- jsmntype_t type;
-
- c = js[parser->pos];
- switch (c) {
- case '{': case '[':
- token = jsmn_alloc_token(parser, tokens, num_tokens);
- if (token == NULL)
- return JSMN_ERROR_NOMEM;
- if (parser->toksuper != -1) {
- tokens[parser->toksuper].size++;
-#ifdef JSMN_PARENT_LINKS
- token->parent = parser->toksuper;
-#endif
- }
- token->type = (c == '{' ? JSMN_OBJECT : JSMN_ARRAY);
- token->start = parser->pos;
- parser->toksuper = parser->toknext - 1;
- break;
- case '}': case ']':
- type = (c == '}' ? JSMN_OBJECT : JSMN_ARRAY);
-#ifdef JSMN_PARENT_LINKS
- if (parser->toknext < 1) {
- return JSMN_ERROR_INVAL;
- }
- token = &tokens[parser->toknext - 1];
- for (;;) {
- if (token->start != -1 && token->end == -1) {
- if (token->type != type) {
- return JSMN_ERROR_INVAL;
- }
- token->end = parser->pos + 1;
- parser->toksuper = token->parent;
- break;
- }
- if (token->parent == -1) {
- break;
- }
- token = &tokens[token->parent];
- }
-#else
- for (i = parser->toknext - 1; i >= 0; i--) {
- token = &tokens[i];
- if (token->start != -1 && token->end == -1) {
- if (token->type != type) {
- return JSMN_ERROR_INVAL;
- }
- parser->toksuper = -1;
- token->end = parser->pos + 1;
- break;
- }
- }
- /* Error if unmatched closing bracket */
- if (i == -1) return JSMN_ERROR_INVAL;
- for (; i >= 0; i--) {
- token = &tokens[i];
- if (token->start != -1 && token->end == -1) {
- parser->toksuper = i;
- break;
- }
- }
-#endif
- break;
- case '\"':
- r = jsmn_parse_string(parser, js, tokens, num_tokens);
- if (r < 0) return r;
- if (parser->toksuper != -1)
- tokens[parser->toksuper].size++;
- break;
- case '\t' : case '\r' : case '\n' : case ':' : case ',': case ' ':
- break;
-#ifdef JSMN_STRICT
- /* In strict mode primitives are: numbers and booleans */
- case '-': case '0': case '1' : case '2': case '3' : case '4':
- case '5': case '6': case '7' : case '8': case '9':
- case 't': case 'f': case 'n' :
-#else
- /* In non-strict mode every unquoted value is a primitive */
- default:
-#endif
- r = jsmn_parse_primitive(parser, js, tokens, num_tokens);
- if (r < 0) return r;
- if (parser->toksuper != -1)
- tokens[parser->toksuper].size++;
- break;
-
-#ifdef JSMN_STRICT
- /* Unexpected char in strict mode */
- default:
- return JSMN_ERROR_INVAL;
-#endif
-
- }
- }
-
- for (i = parser->toknext - 1; i >= 0; i--) {
- /* Unmatched opened object or array */
- if (tokens[i].start != -1 && tokens[i].end == -1) {
- return JSMN_ERROR_PART;
- }
- }
-
- return JSMN_SUCCESS;
-}
-
-/**
- * Creates a new parser based over a given buffer with an array of tokens
- * available.
- */
-void jsmn_init(jsmn_parser *parser) {
- parser->pos = 0;
- parser->toknext = 0;
- parser->toksuper = -1;
-}
-
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