#include <stdio.h>

#include <string.h>

#include <errno.h>

#include <limits.h>

#include <unistd.h>

#include <wchar.h>

#include "test.h"

#define TEST(r, f, x, m) ( \

	errno=0, ((r) = (f)) == (x) || \

	(t_error("%s failed (" m ")\n", #f, r, x, strerror(errno)), 0) )

#define TEST_S(s, x, m) ( \

	!strcmp((s),(x)) || \

	(t_error("[%s] != [%s] (%s)\n", s, x, m), 0) )

static FILE *writetemp(const char *data)

{

	FILE *f = tmpfile();

	size_t n = strlen(data);

	if (!f) return 0;

	if (write(fileno(f), data, n) != n) {

		t_error("write: %s\n", strerror(errno));

		fclose(f);

		return 0;

	}

	if (lseek(fileno(f), 0, SEEK_SET) != 0) {

		t_error("lseek: %s\n", strerror(errno));

		fclose(f);

		return 0;

	}

	return f;

}

int main(void)

{

	int i, x, y;

	double u;

	char a[100], b[100];

	FILE *f;

	TEST(i, !!(f=writetemp("      42")), 1, "failed to make temp file");

	if (f) {

		x=y=-1;

		TEST(i, fwscanf(f, L" %n%*d%n", &x, &y), 0, "%d != %d");

		TEST(i, x, 6, "%d != %d");

		TEST(i, y, 8, "%d != %d");

		TEST(i, ftell(f), 8, "%d != %d");

		TEST(i, !!feof(f), 1, "%d != %d");

		fclose(f);

	}

	TEST(i, !!(f=writetemp("[abc123]....x")), 1, "failed to make temp file");

	if (f) {

		x=y=-1;

		TEST(i, fwscanf(f, L"%10[^]]%n%10[].]%n", a, &x, b, &y), 2, "%d != %d");

		TEST_S(a, "[abc123", "wrong result for %[^]]");

		TEST_S(b, "]....", "wrong result for %[].]");

		TEST(i, x, 7, "%d != %d");

		TEST(i, y, 12, "%d != %d");

		TEST(i, ftell(f), 12, "%d != %d");

		TEST(i, feof(f), 0, "%d != %d");

		TEST(i, fgetc(f), 'x', "%d != %d");

		fclose(f);

	}

	TEST(i, !!(f=writetemp("0x1p 12")), 1, "failed to make temp file");

	if (f) {

		x=y=-1;

		u=-1;

		TEST(i, fwscanf(f, L"%lf%n %d", &u, &x, &y), 0, "%d != %d");

		TEST(u, u, -1.0, "%g != %g");

		TEST(i, x, -1, "%d != %d");

		TEST(i, y, -1, "%d != %d");

		TEST(i, ftell(f), 4, "%d != %d");

		TEST(i, feof(f), 0, "%d != %d");

		TEST(i, fgetc(f), ' ', "%d != %d");

		rewind(f);

		TEST(i, fgetc(f), '0', "%d != %d");

		TEST(i, fgetc(f), 'x', "%d != %d");

		TEST(i, fwscanf(f, L"%lf%n%c %d", &u, &x, a, &y), 3, "%d != %d");

		TEST(u, u, 1.0, "%g != %g");

		TEST(i, x, 1, "%d != %d");

		TEST(i, a[0], 'p', "%d != %d");

		TEST(i, y, 12, "%d != %d");

		TEST(i, ftell(f), 7, "%d != %d");

		TEST(i, !!feof(f), 1, "%d != %d");

		fclose(f);

	}

	TEST(i, !!(f=writetemp("0x.1p4    012")), 1, "failed to make temp file");

	if (f) {

		x=y=-1;

		u=-1;

		TEST(i, fwscanf(f, L"%lf%n %i", &u, &x, &y), 2, "%d != %d");

		TEST(u, u, 1.0, "%g != %g");

		TEST(i, x, 6, "%d != %d");

		TEST(i, y, 10, "%d != %d");

		TEST(i, ftell(f), 13, "%d != %d");

		TEST(i, !!feof(f), 1, "%d != %d");

		fclose(f);

	}

	TEST(i, !!(f=writetemp("0xx")), 1, "failed to make temp file");

	if (f) {

		x=y=-1;

		TEST(i, fwscanf(f, L"%x%n", &x, &y), 0, "%d != %d");

		TEST(i, x, -1, "%d != %d");

		TEST(i, y, -1, "%d != %d");

		TEST(i, ftell(f), 2, "%d != %d");

		TEST(i, feof(f), 0, "%d != %d");

		fclose(f);

	}

	return t_status;

}