#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <xcb-imdkit/encoding.h>

char*
ximutf8compound(const char *s, size_t len, size_t *outlen)
{
	static const char begin[] = "\033%G";
	static const char end[] = "\033%@";
	char *ct;
	size_t n;

	if(s == NULL || len > SIZE_MAX - (sizeof begin + sizeof end - 1))
		return NULL;
	n = len + sizeof begin + sizeof end - 2;
	ct = malloc(n + 1);
	if(ct == NULL)
		return NULL;
	memcpy(ct, begin, sizeof begin - 1);
	memcpy(ct + sizeof begin - 1, s, len);
	memcpy(ct + sizeof begin - 1 + len, end, sizeof end - 1);
	ct[n] = '\0';
	if(outlen != NULL)
		*outlen = n;
	return ct;
}

char*
ximcompound(const char *s, size_t len, size_t *outlen)
{
	char *ct;

	if(s == NULL)
		return NULL;
	ct = xcb_utf8_to_compound_text(s, len, outlen);
	if(ct != NULL)
		return ct;
	/* X.Org Compound Text extension for characters in no legacy charset. */
	return ximutf8compound(s, len, outlen);
}