static int jsmn_parse_string()

in src/source/PeerConnection/jsmn.h [182:250]

• 57 lines of code
• 23 McCabe index (conditional complexity)

static int jsmn_parse_string(jsmn_parser* parser, const char* js, const size_t len, jsmntok_t* tokens, const 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;
}