/src/libplist/src/jsmn.c

Source (jump to first uncovered line)
/*
 * 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, int 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, int num_tokens) {
  jsmntok_t *token;
  int start;

  start = parser->pos;

  for (; (parser->end > 0 && parser->pos < parser->end) && 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;
      default:
        break;
    }
    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;
}

/**
 * Fills next token with JSON string.
 */
static jsmnerr_t jsmn_parse_string(jsmn_parser *parser, const char *js,
    jsmntok_t *tokens, int num_tokens) {
  jsmntok_t *token;

  int start = parser->pos;

  parser->pos++;

  /* Skip starting quote */
  for (; (parser->end > 0 && parser->pos < parser->end) && 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++;
      if (parser->end > 0 && parser->pos >= parser->end) {
        parser->pos = start;
        return JSMN_ERROR_INVAL;
      }
      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, unsigned int length, jsmntok_t *tokens,
    unsigned int num_tokens) {
  jsmnerr_t r;
  int i;
  jsmntok_t *token;

  parser->end = length;

  for (; (parser->end > 0 && parser->pos < parser->end) && 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->end = 0;
  parser->toknext = 0;
  parser->toksuper = -1;
}


Coverage Report

Created: 2025-02-26 06:21

Line	Count	Source (jump to first uncovered line)
1		/*
2		* jsmn.c
3		* Simple JSON parser
4		*
5		* Copyright (c) 2010 Serge A. Zaitsev
6		*
7		* Permission is hereby granted, free of charge, to any person obtaining a copy
8		* of this software and associated documentation files (the "Software"), to deal
9		* in the Software without restriction, including without limitation the rights
10		* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11		* copies of the Software, and to permit persons to whom the Software is
12		* furnished to do so, subject to the following conditions:
13		*
14		* The above copyright notice and this permission notice shall be included in
15		* all copies or substantial portions of the Software.
16		*
17		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20		* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23		* THE SOFTWARE.
24		*/
25
26		#include <stdlib.h>
27
28		#include "jsmn.h"
29
30		/**
31		* Allocates a fresh unused token from the token pull.
32		*/
33		static jsmntok_t jsmn_alloc_token(jsmn_parser parser,
34	0	jsmntok_t *tokens, int num_tokens) {
35	0	jsmntok_t *tok;
36	0	if (parser->toknext >= num_tokens) {
37	0	return NULL;
38	0	}
39	0	tok = &tokens[parser->toknext++];
40	0	tok->start = tok->end = -1;
41	0	tok->size = 0;
42		#ifdef JSMN_PARENT_LINKS
43		tok->parent = -1;
44		#endif
45	0	return tok;
46	0	}
47
48		/**
49		* Fills token type and boundaries.
50		*/
51		static void jsmn_fill_token(jsmntok_t *token, jsmntype_t type,
52	0	int start, int end) {
53	0	token->type = type;
54	0	token->start = start;
55	0	token->end = end;
56	0	token->size = 0;
57	0	}
58
59		/**
60		* Fills next available token with JSON primitive.
61		*/
62		static jsmnerr_t jsmn_parse_primitive(jsmn_parser parser, const char js,
63	0	jsmntok_t *tokens, int num_tokens) {
64	0	jsmntok_t *token;
65	0	int start;
66
67	0	start = parser->pos;
68
69	0	for (; (parser->end > 0 && parser->pos < parser->end) && js[parser->pos] != '\0'; parser->pos++) {
70	0	switch (js[parser->pos]) {
71	0	#ifndef JSMN_STRICT
72		/* In strict mode primitive must be followed by "," or "}" or "]" */
73	0	case ':':
74	0	#endif
75	0	case '\t' : case '\r' : case '\n' : case ' ' :
76	0	case ',' : case ']' : case '}' :
77	0	goto found;
78	0	default:
79	0	break;
80	0	}
81	0	if (js[parser->pos] < 32 \|\| js[parser->pos] >= 127) {
82	0	parser->pos = start;
83	0	return JSMN_ERROR_INVAL;
84	0	}
85	0	}
86		#ifdef JSMN_STRICT
87		/* In strict mode primitive must be followed by a comma/object/array */
88		parser->pos = start;
89		return JSMN_ERROR_PART;
90		#endif
91
92	0	found:
93	0	token = jsmn_alloc_token(parser, tokens, num_tokens);
94	0	if (token == NULL) {
95	0	parser->pos = start;
96	0	return JSMN_ERROR_NOMEM;
97	0	}
98	0	jsmn_fill_token(token, JSMN_PRIMITIVE, start, parser->pos);
99		#ifdef JSMN_PARENT_LINKS
100		token->parent = parser->toksuper;
101		#endif
102	0	parser->pos--;
103	0	return JSMN_SUCCESS;
104	0	}
105
106		/**
107		* Fills next token with JSON string.
108		*/
109		static jsmnerr_t jsmn_parse_string(jsmn_parser parser, const char js,
110	0	jsmntok_t *tokens, int num_tokens) {
111	0	jsmntok_t *token;
112
113	0	int start = parser->pos;
114
115	0	parser->pos++;
116
117		/* Skip starting quote */
118	0	for (; (parser->end > 0 && parser->pos < parser->end) && js[parser->pos] != '\0'; parser->pos++) {
119	0	char c = js[parser->pos];
120
121		/* Quote: end of string */
122	0	if (c == '\"') {
123	0	token = jsmn_alloc_token(parser, tokens, num_tokens);
124	0	if (token == NULL) {
125	0	parser->pos = start;
126	0	return JSMN_ERROR_NOMEM;
127	0	}
128	0	jsmn_fill_token(token, JSMN_STRING, start+1, parser->pos);
129		#ifdef JSMN_PARENT_LINKS
130		token->parent = parser->toksuper;
131		#endif
132	0	return JSMN_SUCCESS;
133	0	}
134
135		/* Backslash: Quoted symbol expected */
136	0	if (c == '\\') {
137	0	parser->pos++;
138	0	if (parser->end > 0 && parser->pos >= parser->end) {
139	0	parser->pos = start;
140	0	return JSMN_ERROR_INVAL;
141	0	}
142	0	switch (js[parser->pos]) {
143		/* Allowed escaped symbols */
144	0	case '\"': case '/' : case '\\' : case 'b' :
145	0	case 'f' : case 'r' : case 'n' : case 't' :
146	0	break;
147		/* Allows escaped symbol \uXXXX */
148	0	case 'u':
149		/* TODO */
150	0	break;
151		/* Unexpected symbol */
152	0	default:
153	0	parser->pos = start;
154	0	return JSMN_ERROR_INVAL;
155	0	}
156	0	}
157	0	}
158	0	parser->pos = start;
159	0	return JSMN_ERROR_PART;
160	0	}
161
162		/**
163		* Parse JSON string and fill tokens.
164		*/
165		jsmnerr_t jsmn_parse(jsmn_parser parser, const char js, unsigned int length, jsmntok_t *tokens,
166	0	unsigned int num_tokens) {
167	0	jsmnerr_t r;
168	0	int i;
169	0	jsmntok_t *token;
170
171	0	parser->end = length;
172
173	0	for (; (parser->end > 0 && parser->pos < parser->end) && js[parser->pos] != '\0'; parser->pos++) {
174	0	char c;
175	0	jsmntype_t type;
176
177	0	c = js[parser->pos];
178	0	switch (c) {
179	0	case '{': case '[':
180	0	token = jsmn_alloc_token(parser, tokens, num_tokens);
181	0	if (token == NULL)
182	0	return JSMN_ERROR_NOMEM;
183	0	if (parser->toksuper != -1) {
184	0	tokens[parser->toksuper].size++;
185		#ifdef JSMN_PARENT_LINKS
186		token->parent = parser->toksuper;
187		#endif
188	0	}
189	0	token->type = (c == '{' ? JSMN_OBJECT : JSMN_ARRAY);
190	0	token->start = parser->pos;
191	0	parser->toksuper = parser->toknext - 1;
192	0	break;
193	0	case '}': case ']':
194	0	type = (c == '}' ? JSMN_OBJECT : JSMN_ARRAY);
195		#ifdef JSMN_PARENT_LINKS
196		if (parser->toknext < 1) {
197		return JSMN_ERROR_INVAL;
198		}
199		token = &tokens[parser->toknext - 1];
200		for (;;) {
201		if (token->start != -1 && token->end == -1) {
202		if (token->type != type) {
203		return JSMN_ERROR_INVAL;
204		}
205		token->end = parser->pos + 1;
206		parser->toksuper = token->parent;
207		break;
208		}
209		if (token->parent == -1) {
210		break;
211		}
212		token = &tokens[token->parent];
213		}
214		#else
215	0	for (i = parser->toknext - 1; i >= 0; i--) {
216	0	token = &tokens[i];
217	0	if (token->start != -1 && token->end == -1) {
218	0	if (token->type != type) {
219	0	return JSMN_ERROR_INVAL;
220	0	}
221	0	parser->toksuper = -1;
222	0	token->end = parser->pos + 1;
223	0	break;
224	0	}
225	0	}
226		/* Error if unmatched closing bracket */
227	0	if (i == -1) return JSMN_ERROR_INVAL;
228	0	for (; i >= 0; i--) {
229	0	token = &tokens[i];
230	0	if (token->start != -1 && token->end == -1) {
231	0	parser->toksuper = i;
232	0	break;
233	0	}
234	0	}
235	0	#endif
236	0	break;
237	0	case '\"':
238	0	r = jsmn_parse_string(parser, js, tokens, num_tokens);
239	0	if (r < 0) return r;
240	0	if (parser->toksuper != -1)
241	0	tokens[parser->toksuper].size++;
242	0	break;
243	0	case '\t' : case '\r' : case '\n' : case ':' : case ',': case ' ':
244	0	break;
245		#ifdef JSMN_STRICT
246		/* In strict mode primitives are: numbers and booleans */
247		case '-': case '0': case '1' : case '2': case '3' : case '4':
248		case '5': case '6': case '7' : case '8': case '9':
249		case 't': case 'f': case 'n' :
250		#else
251		/* In non-strict mode every unquoted value is a primitive */
252	0	default:
253	0	#endif
254	0	r = jsmn_parse_primitive(parser, js, tokens, num_tokens);
255	0	if (r < 0) return r;
256	0	if (parser->toksuper != -1)
257	0	tokens[parser->toksuper].size++;
258	0	break;
259
260		#ifdef JSMN_STRICT
261		/* Unexpected char in strict mode */
262		default:
263		return JSMN_ERROR_INVAL;
264		#endif
265
266	0	}
267	0	}
268
269	0	for (i = parser->toknext - 1; i >= 0; i--) {
270		/* Unmatched opened object or array */
271	0	if (tokens[i].start != -1 && tokens[i].end == -1) {
272	0	return JSMN_ERROR_PART;
273	0	}
274	0	}
275
276	0	return JSMN_SUCCESS;
277	0	}
278
279		/**
280		* Creates a new parser based over a given buffer with an array of tokens
281		* available.
282		*/
283	0	void jsmn_init(jsmn_parser *parser) {
284	0	parser->pos = 0;
285	0	parser->end = 0;
286	0	parser->toknext = 0;
287	0	parser->toksuper = -1;
288	0	}
289