/src/ntp-dev/libjsmn/jsmn.c

Source (jump to first uncovered line)
#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,
    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;
}

/**
 * Filsl next token with JSON string.
 */
static jsmnerr_t 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.
 */
jsmnerr_t jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
    jsmntok_t *tokens, unsigned int num_tokens) {
  jsmnerr_t r;
  int i;
  jsmntok_t *token;
  int count = 0;

  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 &&
            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) {
          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;
}


Coverage Report

Created: 2023-05-19 06:16

Line	Count	Source (jump to first uncovered line)
1		#include <stdlib.h>
2
3		#include "jsmn.h"
4
5		/**
6		* Allocates a fresh unused token from the token pull.
7		*/
8		static jsmntok_t jsmn_alloc_token(jsmn_parser parser,
9	0	jsmntok_t *tokens, size_t num_tokens) {
10	0	jsmntok_t *tok;
11	0	if (parser->toknext >= num_tokens) {
12	0	return NULL;
13	0	}
14	0	tok = &tokens[parser->toknext++];
15	0	tok->start = tok->end = -1;
16	0	tok->size = 0;
17	0	#ifdef JSMN_PARENT_LINKS
18	0	tok->parent = -1;
19	0	#endif
20	0	return tok;
21	0	}
22
23		/**
24		* Fills token type and boundaries.
25		*/
26		static void jsmn_fill_token(jsmntok_t *token, jsmntype_t type,
27	0	int start, int end) {
28	0	token->type = type;
29	0	token->start = start;
30	0	token->end = end;
31	0	token->size = 0;
32	0	}
33
34		/**
35		* Fills next available token with JSON primitive.
36		*/
37		static jsmnerr_t jsmn_parse_primitive(jsmn_parser parser, const char js,
38	0	size_t len, jsmntok_t *tokens, size_t num_tokens) {
39	0	jsmntok_t *token;
40	0	int start;
41
42	0	start = parser->pos;
43
44	0	for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
45	0	switch (js[parser->pos]) {
46	0	#ifndef JSMN_STRICT
47		/* In strict mode primitive must be followed by "," or "}" or "]" */
48	0	case ':':
49	0	#endif
50	0	case '\t' : case '\r' : case '\n' : case ' ' :
51	0	case ',' : case ']' : case '}' :
52	0	goto found;
53	0	}
54	0	if (js[parser->pos] < 32 \|\| js[parser->pos] >= 127) {
55	0	parser->pos = start;
56	0	return JSMN_ERROR_INVAL;
57	0	}
58	0	}
59		#ifdef JSMN_STRICT
60		/* In strict mode primitive must be followed by a comma/object/array */
61		parser->pos = start;
62		return JSMN_ERROR_PART;
63		#endif
64
65	0	found:
66	0	if (tokens == NULL) {
67	0	parser->pos--;
68	0	return 0;
69	0	}
70	0	token = jsmn_alloc_token(parser, tokens, num_tokens);
71	0	if (token == NULL) {
72	0	parser->pos = start;
73	0	return JSMN_ERROR_NOMEM;
74	0	}
75	0	jsmn_fill_token(token, JSMN_PRIMITIVE, start, parser->pos);
76	0	#ifdef JSMN_PARENT_LINKS
77	0	token->parent = parser->toksuper;
78	0	#endif
79	0	parser->pos--;
80	0	return 0;
81	0	}
82
83		/**
84		* Filsl next token with JSON string.
85		*/
86		static jsmnerr_t jsmn_parse_string(jsmn_parser parser, const char js,
87	0	size_t len, jsmntok_t *tokens, size_t num_tokens) {
88	0	jsmntok_t *token;
89
90	0	int start = parser->pos;
91
92	0	parser->pos++;
93
94		/* Skip starting quote */
95	0	for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
96	0	char c = js[parser->pos];
97
98		/* Quote: end of string */
99	0	if (c == '\"') {
100	0	if (tokens == NULL) {
101	0	return 0;
102	0	}
103	0	token = jsmn_alloc_token(parser, tokens, num_tokens);
104	0	if (token == NULL) {
105	0	parser->pos = start;
106	0	return JSMN_ERROR_NOMEM;
107	0	}
108	0	jsmn_fill_token(token, JSMN_STRING, start+1, parser->pos);
109	0	#ifdef JSMN_PARENT_LINKS
110	0	token->parent = parser->toksuper;
111	0	#endif
112	0	return 0;
113	0	}
114
115		/* Backslash: Quoted symbol expected */
116	0	if (c == '\\' && parser->pos + 1 < len) {
117	0	int i;
118	0	parser->pos++;
119	0	switch (js[parser->pos]) {
120		/* Allowed escaped symbols */
121	0	case '\"': case '/' : case '\\' : case 'b' :
122	0	case 'f' : case 'r' : case 'n' : case 't' :
123	0	break;
124		/* Allows escaped symbol \uXXXX */
125	0	case 'u':
126	0	parser->pos++;
127	0	for(i = 0; i < 4 && parser->pos < len && js[parser->pos] != '\0'; i++) {
128		/* If it isn't a hex character we have an error */
129	0	if(!((js[parser->pos] >= 48 && js[parser->pos] <= 57) \|\| /* 0-9 */
130	0	(js[parser->pos] >= 65 && js[parser->pos] <= 70) \|\| /* A-F */
131	0	(js[parser->pos] >= 97 && js[parser->pos] <= 102))) { /* a-f */
132	0	parser->pos = start;
133	0	return JSMN_ERROR_INVAL;
134	0	}
135	0	parser->pos++;
136	0	}
137	0	parser->pos--;
138	0	break;
139		/* Unexpected symbol */
140	0	default:
141	0	parser->pos = start;
142	0	return JSMN_ERROR_INVAL;
143	0	}
144	0	}
145	0	}
146	0	parser->pos = start;
147	0	return JSMN_ERROR_PART;
148	0	}
149
150		/**
151		* Parse JSON string and fill tokens.
152		*/
153		jsmnerr_t jsmn_parse(jsmn_parser parser, const char js, size_t len,
154	0	jsmntok_t *tokens, unsigned int num_tokens) {
155	0	jsmnerr_t r;
156	0	int i;
157	0	jsmntok_t *token;
158	0	int count = 0;
159
160	0	for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
161	0	char c;
162	0	jsmntype_t type;
163
164	0	c = js[parser->pos];
165	0	switch (c) {
166	0	case '{': case '[':
167	0	count++;
168	0	if (tokens == NULL) {
169	0	break;
170	0	}
171	0	token = jsmn_alloc_token(parser, tokens, num_tokens);
172	0	if (token == NULL)
173	0	return JSMN_ERROR_NOMEM;
174	0	if (parser->toksuper != -1) {
175	0	tokens[parser->toksuper].size++;
176	0	#ifdef JSMN_PARENT_LINKS
177	0	token->parent = parser->toksuper;
178	0	#endif
179	0	}
180	0	token->type = (c == '{' ? JSMN_OBJECT : JSMN_ARRAY);
181	0	token->start = parser->pos;
182	0	parser->toksuper = parser->toknext - 1;
183	0	break;
184	0	case '}': case ']':
185	0	if (tokens == NULL)
186	0	break;
187	0	type = (c == '}' ? JSMN_OBJECT : JSMN_ARRAY);
188	0	#ifdef JSMN_PARENT_LINKS
189	0	if (parser->toknext < 1) {
190	0	return JSMN_ERROR_INVAL;
191	0	}
192	0	token = &tokens[parser->toknext - 1];
193	0	for (;;) {
194	0	if (token->start != -1 && token->end == -1) {
195	0	if (token->type != type) {
196	0	return JSMN_ERROR_INVAL;
197	0	}
198	0	token->end = parser->pos + 1;
199	0	parser->toksuper = token->parent;
200	0	break;
201	0	}
202	0	if (token->parent == -1) {
203	0	break;
204	0	}
205	0	token = &tokens[token->parent];
206	0	}
207		#else
208		for (i = parser->toknext - 1; i >= 0; i--) {
209		token = &tokens[i];
210		if (token->start != -1 && token->end == -1) {
211		if (token->type != type) {
212		return JSMN_ERROR_INVAL;
213		}
214		parser->toksuper = -1;
215		token->end = parser->pos + 1;
216		break;
217		}
218		}
219		/* Error if unmatched closing bracket */
220		if (i == -1) return JSMN_ERROR_INVAL;
221		for (; i >= 0; i--) {
222		token = &tokens[i];
223		if (token->start != -1 && token->end == -1) {
224		parser->toksuper = i;
225		break;
226		}
227		}
228		#endif
229	0	break;
230	0	case '\"':
231	0	r = jsmn_parse_string(parser, js, len, tokens, num_tokens);
232	0	if (r < 0) return r;
233	0	count++;
234	0	if (parser->toksuper != -1 && tokens != NULL)
235	0	tokens[parser->toksuper].size++;
236	0	break;
237	0	case '\t' : case '\r' : case '\n' : case ' ':
238	0	break;
239	0	case ':':
240	0	parser->toksuper = parser->toknext - 1;
241	0	break;
242	0	case ',':
243	0	if (tokens != NULL &&
244	0	tokens[parser->toksuper].type != JSMN_ARRAY &&
245	0	tokens[parser->toksuper].type != JSMN_OBJECT) {
246	0	#ifdef JSMN_PARENT_LINKS
247	0	parser->toksuper = tokens[parser->toksuper].parent;
248		#else
249		for (i = parser->toknext - 1; i >= 0; i--) {
250		if (tokens[i].type == JSMN_ARRAY \|\| tokens[i].type == JSMN_OBJECT) {
251		if (tokens[i].start != -1 && tokens[i].end == -1) {
252		parser->toksuper = i;
253		break;
254		}
255		}
256		}
257		#endif
258	0	}
259	0	break;
260		#ifdef JSMN_STRICT
261		/* In strict mode primitives are: numbers and booleans */
262		case '-': case '0': case '1' : case '2': case '3' : case '4':
263		case '5': case '6': case '7' : case '8': case '9':
264		case 't': case 'f': case 'n' :
265		/* And they must not be keys of the object */
266		if (tokens != NULL) {
267		jsmntok_t *t = &tokens[parser->toksuper];
268		if (t->type == JSMN_OBJECT \|\|
269		(t->type == JSMN_STRING && t->size != 0)) {
270		return JSMN_ERROR_INVAL;
271		}
272		}
273		#else
274		/* In non-strict mode every unquoted value is a primitive */
275	0	default:
276	0	#endif
277	0	r = jsmn_parse_primitive(parser, js, len, tokens, num_tokens);
278	0	if (r < 0) return r;
279	0	count++;
280	0	if (parser->toksuper != -1 && tokens != NULL)
281	0	tokens[parser->toksuper].size++;
282	0	break;
283
284		#ifdef JSMN_STRICT
285		/* Unexpected char in strict mode */
286		default:
287		return JSMN_ERROR_INVAL;
288		#endif
289	0	}
290	0	}
291	0	if (tokens != NULL) {
292	0	for (i = parser->toknext - 1; i >= 0; i--) {
293		/* Unmatched opened object or array */
294	0	if (tokens[i].start != -1 && tokens[i].end == -1) {
295	0	return JSMN_ERROR_PART;
296	0	}
297	0	}
298	0	}
299
300	0	return count;
301	0	}
302
303		/**
304		* Creates a new parser based over a given buffer with an array of tokens
305		* available.
306		*/
307	0	void jsmn_init(jsmn_parser *parser) {
308	0	parser->pos = 0;
309	0	parser->toknext = 0;
310	0	parser->toksuper = -1;
311	0	}
312