--- /dev/null
+/*
+ * 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.
+ */
+
+/**
+ * @file jsmn.h
+ * @brief Definition of the JSMN (Jasmine) JSON parser.
+ *
+ * For more information on JSMN:
+ * @see http://zserge.com/jsmn.html
+ */
+
+#ifndef __JSMN_H_
+#define __JSMN_H_
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * JSON type identifier. Basic types are:
+ * o Object
+ * o Array
+ * o String
+ * o Other primitive: number, boolean (true/false) or null
+ */
+typedef enum {
+ JSMN_UNDEFINED = 0,
+ JSMN_OBJECT = 1,
+ JSMN_ARRAY = 2,
+ JSMN_STRING = 3,
+ JSMN_PRIMITIVE = 4
+} jsmntype_t;
+
+enum jsmnerr {
+ /* Not enough tokens were provided */
+ JSMN_ERROR_NOMEM = -1,
+ /* Invalid character inside JSON string */
+ JSMN_ERROR_INVAL = -2,
+ /* The string is not a full JSON packet, more bytes expected */
+ JSMN_ERROR_PART = -3
+};
+
+/**
+ * JSON token description.
+ * @param type type (object, array, string etc.)
+ * @param start start position in JSON data string
+ * @param end end position in JSON data string
+ */
+typedef struct {
+ jsmntype_t type;
+ int start;
+ int end;
+ int size;
+#ifdef JSMN_PARENT_LINKS
+ int parent;
+#endif
+} jsmntok_t;
+
+/**
+ * JSON parser. Contains an array of token blocks available. Also stores
+ * the string being parsed now and current position in that string
+ */
+typedef struct {
+ unsigned int pos; /* offset in the JSON string */
+ unsigned int toknext; /* next token to allocate */
+ int toksuper; /* superior token node, e.g parent object or array */
+} jsmn_parser;
+
+/**
+ * Create JSON parser over an array of tokens
+ */
+void jsmn_init(jsmn_parser *parser);
+
+/**
+ * Run JSON parser. It parses a JSON data string into and array of tokens, each describing
+ * a single JSON object.
+ */
+int jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
+ jsmntok_t *tokens, unsigned int num_tokens);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __JSMN_H_ */
--- /dev/null
+/*
+ * 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.
+ */
+
+/**
+ * @file jsmn.c
+ * @brief Implementation of the JSMN (Jasmine) JSON parser.
+ *
+ * For more information on JSMN:
+ * @see http://zserge.com/jsmn.html
+ */
+
+#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 int jsmn_parse_primitive(jsmn_parser *parser, const char *js,
+ size_t len, jsmntok_t *tokens, size_t num_tokens) {
+ jsmntok_t *token;
+ int start;
+
+ start = parser->pos;
+
+ for (; parser->pos < len && 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:
+ if (tokens == NULL) {
+ parser->pos--;
+ return 0;
+ }
+ 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 0;
+}
+
+/**
+ * Fills next token with JSON string.
+ */
+static int jsmn_parse_string(jsmn_parser *parser, const char *js,
+ size_t len, jsmntok_t *tokens, size_t num_tokens) {
+ jsmntok_t *token;
+
+ int start = parser->pos;
+
+ parser->pos++;
+
+ /* Skip starting quote */
+ for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
+ char c = js[parser->pos];
+
+ /* Quote: end of string */
+ if (c == '\"') {
+ if (tokens == NULL) {
+ return 0;
+ }
+ 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 0;
+ }
+
+ /* Backslash: Quoted symbol expected */
+ if (c == '\\' && parser->pos + 1 < len) {
+ int i;
+ 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':
+ parser->pos++;
+ for(i = 0; i < 4 && parser->pos < len && js[parser->pos] != '\0'; i++) {
+ /* If it isn't a hex character we have an error */
+ if(!((js[parser->pos] >= 48 && js[parser->pos] <= 57) || /* 0-9 */
+ (js[parser->pos] >= 65 && js[parser->pos] <= 70) || /* A-F */
+ (js[parser->pos] >= 97 && js[parser->pos] <= 102))) { /* a-f */
+ parser->pos = start;
+ return JSMN_ERROR_INVAL;
+ }
+ parser->pos++;
+ }
+ parser->pos--;
+ break;
+ /* Unexpected symbol */
+ default:
+ parser->pos = start;
+ return JSMN_ERROR_INVAL;
+ }
+ }
+ }
+ parser->pos = start;
+ return JSMN_ERROR_PART;
+}
+
+/**
+ * Parse JSON string and fill tokens.
+ */
+int jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
+ jsmntok_t *tokens, unsigned int num_tokens) {
+ int r;
+ int i;
+ jsmntok_t *token;
+ int count = parser->toknext;
+
+ for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
+ char c;
+ jsmntype_t type;
+
+ c = js[parser->pos];
+ switch (c) {
+ case '{': case '[':
+ count++;
+ if (tokens == NULL) {
+ break;
+ }
+ 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 ']':
+ if (tokens == NULL)
+ break;
+ 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, len, tokens, num_tokens);
+ if (r < 0) return r;
+ count++;
+ if (parser->toksuper != -1 && tokens != NULL)
+ tokens[parser->toksuper].size++;
+ break;
+ case '\t' : case '\r' : case '\n' : case ' ':
+ break;
+ case ':':
+ parser->toksuper = parser->toknext - 1;
+ break;
+ case ',':
+ if (tokens != NULL && parser->toksuper != -1 &&
+ tokens[parser->toksuper].type != JSMN_ARRAY &&
+ tokens[parser->toksuper].type != JSMN_OBJECT) {
+#ifdef JSMN_PARENT_LINKS
+ parser->toksuper = tokens[parser->toksuper].parent;
+#else
+ for (i = parser->toknext - 1; i >= 0; i--) {
+ if (tokens[i].type == JSMN_ARRAY || tokens[i].type == JSMN_OBJECT) {
+ if (tokens[i].start != -1 && tokens[i].end == -1) {
+ parser->toksuper = i;
+ break;
+ }
+ }
+ }
+#endif
+ }
+ 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' :
+ /* And they must not be keys of the object */
+ if (tokens != NULL && parser->toksuper != -1) {
+ jsmntok_t *t = &tokens[parser->toksuper];
+ if (t->type == JSMN_OBJECT ||
+ (t->type == JSMN_STRING && t->size != 0)) {
+ return JSMN_ERROR_INVAL;
+ }
+ }
+#else
+ /* In non-strict mode every unquoted value is a primitive */
+ default:
+#endif
+ r = jsmn_parse_primitive(parser, js, len, tokens, num_tokens);
+ if (r < 0) return r;
+ count++;
+ if (parser->toksuper != -1 && tokens != NULL)
+ tokens[parser->toksuper].size++;
+ break;
+
+#ifdef JSMN_STRICT
+ /* Unexpected char in strict mode */
+ default:
+ return JSMN_ERROR_INVAL;
+#endif
+ }
+ }
+
+ if (tokens != NULL) {
+ 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 count;
+}
+
+/**
+ * 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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