Exemple #1
0
/**
 * 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;
         }
         if(js[parser->pos + 1] == ':')
         {
            jsmn_fill_token(token, JSMN_NAME, start+1, parser->pos);
         }
         else
         {
            jsmn_fill_token(token, JSMN_STRING, start+1, parser->pos);
         }
         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;
}
Exemple #2
0
/**
 * 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':
					parser->pos++;
					int i = 0;
					for(; i < 4 && 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;
}
Exemple #3
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]) 
      {
      case ':':
      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;
      }
   }

 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);
   parser->pos--;
   return JSMN_SUCCESS;
}
Exemple #4
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;
}
Exemple #5
0
/**
 * Filsl 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 (; 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':
					// \u not supported
					break;
				/* Unexpected symbol */
				default:
					parser->pos = start;
					return JSMN_ERROR_INVAL;
			}
		}
	}
	parser->pos = start;
	return JSMN_ERROR_PART;
}
Exemple #6
0
/**
 * Parse JSON string and fill tokens.
 */
jsmnerr_t jsmn_parse(jsmn_parser *parser, const char *js, jsmntok_t *tokens, 
		unsigned int num_tokens) {
	int r;
	int i;
	jsmntok_t *token;

	/* initialize the rest of tokens (they could be reallocated) */
	for (i = parser->toknext; i < num_tokens; i++) {
		jsmn_fill_token(&tokens[i], JSMN_PRIMITIVE, -1, -1);
	}

	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++;
				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);
				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;
					}
				}
				break;
			case '\"':
				r = jsmn_parse_string(parser, js, tokens, num_tokens);
				if (r < 0) return jsmnerr_t(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 jsmnerr_t(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;
}
Exemple #7
0
static jsmnerr_t jsmn_parse_string(jsmn_parser *parser, const char *js,
		jsmntok_t *tokens, size_t num_tokens)
#endif

{

	jsmntok_t *token;

	int start = parser->pos;		//记录头位置

	parser->pos++;	//越过"

	/* Skip starting quote */
#ifdef JSMN_OPTIMIZE
	for (; js[parser->pos] != '\0'&& parser->pos < js_len ; parser->pos++) 	//直到尾部
#else
	for (; js[parser->pos] != '\0'; parser->pos++)
#endif


	{
		char c = js[parser->pos];

		/* Quote: end of string */
		if (c == '\"') {		//定位到尾部
			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++;							//简单越过
			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;
}
Exemple #8
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]) {
			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;
		}
	}
	if ( (parser->pos < len) && (js[parser->pos] != '\0') ) {
		/* In strict mode primitive must be followed by a comma/object/array or end-of-string */
		parser->pos = start;
		return JSMN_ERROR_PART;
	}

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);
	token->parent = parser->toksuper;

	/* parse/validate primitives according */
	do {
		if (js[start] == 't') {
			if ( (token->end - start == 4) && (js[start+1] == 'r') && (js[start+2] == 'u') && (js[start+3] == 'e') ) {
				break;
			}
		} else if (js[start] == 'f') {
			if ( (token->end - start == 5) && (js[start+1] == 'a') && (js[start+2] == 'l') && (js[start+3] == 's') && (js[start+4] == 'e') ) {
				break;
			}
		} else if (js[start] == 'n') {
			if ( (token->end - start == 4) && (js[start+1] == 'u') && (js[start+2] == 'l') && (js[start+3] == 'l') ) {
				break;
			}
		} else {
			if (jsmn_parse_primitive_number(js, token) == 0) {
				break;
			}
		}

		/* primitive validation failed */
		parser->pos = token->start;
		return JSMN_ERROR_PRIMITIVE_INVAL;
	} while (0);

	parser->pos--;
	return 0;
}