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

char*
ximcompound(const char *s, size_t len, size_t *outlen)
{
	static const char utf8[] = "\033%G";
	char *ct;

	if(s == NULL || len > SIZE_MAX - sizeof utf8)
		return NULL;
	ct = xcb_utf8_to_compound_text(s, len, outlen);
	if(ct != NULL)
		return ct;
	/* X11 Compound Text reserves ESC % G for an embedded UTF-8 run. */
	ct = malloc(len + sizeof utf8);
	if(ct == NULL)
		return NULL;
	memcpy(ct, utf8, sizeof utf8 - 1);
	memcpy(ct + sizeof utf8 - 1, s, len);
	ct[len + sizeof utf8 - 1] = '\0';
	if(outlen != NULL)
		*outlen = len + sizeof utf8 - 1;
	return ct;
}