/*
	% cc `pkg-config --cflags --libs fontconfig` -o testcase testcase.c
	% ./testcase sk_SK.UTF-8 sr_Cyrl_RS.UTF-8
	For patched fontconfig:
	Result of FcLangNormalize for 'sk_SK.UTF-8' is 'sk'
	Result of FcLangNormalize for 'sr_Cyrl_RS.UTF-8' is 'sr'

	For unpatched fontconfig:
	Result of FcLangNormalize for 'sk_SK.UTF-8' is 'sk'
	Fontconfig warning: ignoring sr_Cyrl_RS.UTF-8: not a valid region tag
	No result of FcLangNormalize for 'sr_Cyrl_RS.UTF-8'
*/

#include <stdio.h>
#include <fontconfig/fontconfig.h>

int main(int argc, const char *argv[])
{
	if (argc < 2) {
		fprintf(stderr, "Additional argument(s) required\n"
			"Example of usage: %s en_US.UTF_8\n", argv[0]);

		return 1;
	}

	for (int i = 1; i < argc; ++i) {
		FcChar8 *result = NULL;
		result = FcLangNormalize((FcChar8 *) argv[i]);
		if (result) {
			printf("Result of FcLangNormalize for '%s' is '%s'\n", argv[i], result);
			FcStrFree(result);
		} else {
			printf("No result of FcLangNormalize for '%s'\n", argv[i]);
		}
	}

	return 0;
}