#include <iconv.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>

#define T(x) ((x) || (e+=fail(r, errno, i, j, out1, pout, outb, #x)))

int fail(int r, int err, int i, int j, char *start, char *end, size_t rem, char *pred)
{
	printf("%.2x %.2x: returned %d (%s), start %p end %p rem %zu: failed assertion: %s\n",
		i, j, r, r<0?strerror(err):"", start, end, rem, pred);
	return 1;
}


int main()
{
	iconv_t cd = iconv_open("UTF-8", "EUC-KR");
	int e = 0;
	for (int i=0; i<256; i++)
		for (int j=0; j<256; j++) {
			char in[3] = { i, j, 'x' };
			char out[12] = "", *out1=out+4;
			char *pin = in, *pout = out1;
			size_t inb = sizeof in;
			size_t outb = sizeof out - (out1-out);
			errno = 0;
			size_t r = iconv(cd, &pin, &inb, &pout, &outb);
			T(pout>=out1 && pout<out+sizeof out);
			T(outb <= sizeof out - (out1-out));
			T(out1[-1]=='\0');
		}
	return !!e;
}