Class: String

Inherits:
Object show all
Defined in:
(unknown)

Instance Method Summary collapse

Instance Method Details

#fast_xs ⇒ Object

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



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# File 'ext/fast_xs/fast_xs.c', line 156

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;
}