static int re_parse_group_name()

in src/couch_quickjs/quickjs/libregexp.c [972:1024]

• 52 lines of code
• 15 McCabe index (conditional complexity)

static int re_parse_group_name(char *buf, int buf_size, const uint8_t **pp)
{
    const uint8_t *p, *p1;
    uint32_t c, d;
    char *q;

    p = *pp;
    q = buf;
    for(;;) {
        c = *p;
        if (c == '\\') {
            p++;
            if (*p != 'u')
                return -1;
            c = lre_parse_escape(&p, 2); // accept surrogate pairs
        } else if (c == '>') {
            break;
        } else if (c >= 128) {
            c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p);
            if (is_hi_surrogate(c)) {
                d = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p1);
                if (is_lo_surrogate(d)) {
                    c = from_surrogate(c, d);
                    p = p1;
                }
            }
        } else {
            p++;
        }
        if (c > 0x10FFFF)
            return -1;
        if (q == buf) {
            if (!lre_js_is_ident_first(c))
                return -1;
        } else {
            if (!lre_js_is_ident_next(c))
                return -1;
        }
        if ((q - buf + UTF8_CHAR_LEN_MAX + 1) > buf_size)
            return -1;
        if (c < 128) {
            *q++ = c;
        } else {
            q += unicode_to_utf8((uint8_t*)q, c);
        }
    }
    if (q == buf)
        return -1;
    *q = '\0';
    p++;
    *pp = p;
    return 0;
}