class String

Public Instance Methods

fast_xs() click to toggle source

escapes strings for XML The double-quote (“) character is translated to ”"“

static VALUE fast_xs(VALUE self)
{
        long i;
        VALUE array;
        char *c;
        size_t s_len;
        VALUE *tmp;
        VALUE rv;

        array = rb_rescue(unpack_utf8, self, unpack_uchar, self);

        for (tmp = RARRAY_PTR(array), s_len = i = RARRAY_LEN(array);
             --i >= 0;
             tmp++) {
                int n = NUM2INT(*tmp);
                if (likely(n < 128)) {
                        if (unlikely(n == '"'))
                                s_len += (sizeof("&quot;") - 2);
                        if (unlikely(n == '&'))
                                s_len += (sizeof("&amp;") - 2);
                        if (unlikely(n == '>' || n == '<'))
                                s_len += (sizeof("&gt;") - 2);
                        continue;
                }

                CP_1252_ESCAPE(n);

                if (VALID_VALUE(n))
                        s_len += bytes_for(n) - 1;
        }

        rv = rb_str_new(NULL, s_len);
        ASSOCIATE_INDEX(rv, rb_default_external_encoding());
        c = RSTRING_PTR(rv);

        for (tmp = RARRAY_PTR(array), i = RARRAY_LEN(array); --i >= 0; tmp++)
                c += escape(c, NUM2INT(*tmp));

        return rv;
}