#define _POSIX_C_SOURCE 200809L
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <unistd.h>
#include "test.h"

#define T(r, f, x, m) do { \
	r = (f); \
	if (r != (x)) \
		error("%s failed (got %d, expected %d, errno \"%s\") (%s)\n", \
			#f, r, x, errno ? strerror(errno) : "", m); \
	errno = 0; \
} while (0)

static void S(const char *s, const char *x, const char *m) {
	if (strcmp(s, x) != 0)
		error("got [%s], expected [%s] (%s)\n", s, x, m);
}

void test_fscanf(void) {
	int i, x, y;
	char a[100], b[100];
	int p[2];
	FILE *f;

	T(i, pipe(p), 0, "open pipe");
	T(i, !(f = fdopen(p[0], "rb")), 0, "fdopen pipe");
	if (!f) {
		close(p[0]);
		close(p[1]);
		return;
	}

	T(i, write(p[1], "hello, world\n", 13), 13, "write to pipe");
	T(i, fscanf(f, "%s %[own]", a, b), 2, "");
	S(a, "hello,", "wrong result for %s");
	S(b, "wo", "wrong result for %[own]");
	T(i, fgetc(f), 'r', "fgetc 'r'");

	T(i, write(p[1], " 0x12 0x34", 10), 10, "");
	T(i, fscanf(f, "ld %5i%2i", &x, &y), 1, "");
	T(i, x, 0x12, "");
	T(i, fgetc(f), '3', "fgetc '3'");

	fclose(f);
	close(p[1]);
}