/*-
 * Copyright (c) 2002 Tim J. Robbins
 * All rights reserved.
 *
 * Copyright (c) 2013 Ed Schouten <ed@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
/*
 * Test program for c16rtomb() as specified by ISO/IEC 9899:2011.
 */

#include <sys/cdefs.h>
#include <errno.h>
#include <limits.h>
#include <locale.h>
#include <stdio.h>
#include <string.h>
#include <uchar.h>

#include <atf-c.h>

static void
require_lc_ctype(const char *locale_name)
{
	char *lc_ctype_set;

	lc_ctype_set = setlocale(LC_CTYPE, locale_name);
	if (lc_ctype_set == NULL)
		atf_tc_fail("setlocale(LC_CTYPE, \"%s\") failed; errno=%d",
		    locale_name, errno);

	ATF_REQUIRE(strcmp(lc_ctype_set, locale_name) == 0);
}

static mbstate_t s;
static char buf[MB_LEN_MAX + 1];

ATF_TC_WITHOUT_HEAD(c16rtomb_c_locale_test);
ATF_TC_BODY(c16rtomb_c_locale_test, tc)
{

	require_lc_ctype("C");

	/*
	 * If the buffer argument is NULL, c16 is implicitly 0,
	 * c16rtomb() resets its internal state.
	 */
	ATF_REQUIRE(c16rtomb(NULL, L'\0', NULL) == 1);
	ATF_REQUIRE(c16rtomb(NULL, 0xdc00, NULL) == 1);

	/* Null wide character. */
	memset(&s, 0, sizeof(s));
	memset(buf, 0xcc, sizeof(buf));
	ATF_REQUIRE(c16rtomb(buf, 0, &s) == 1);
	ATF_REQUIRE((unsigned char)buf[0] == 0 && (unsigned char)buf[1] == 0xcc);

	/* Latin letter A, internal state. */
	ATF_REQUIRE(c16rtomb(NULL, L'\0', NULL) == 1);
	ATF_REQUIRE(c16rtomb(NULL, L'A', NULL) == 1);

	/* Latin letter A. */
	memset(&s, 0, sizeof(s));
	memset(buf, 0xcc, sizeof(buf));
	ATF_REQUIRE(c16rtomb(buf, L'A', &s) == 1);
	ATF_REQUIRE((unsigned char)buf[0] == 'A' && (unsigned char)buf[1] == 0xcc);

	/* Unicode character 'Pile of poo'. */
	memset(&s, 0, sizeof(s));
	memset(buf, 0xcc, sizeof(buf));
	ATF_REQUIRE(c16rtomb(buf, 0xd83d, &s) == 0);
	ATF_REQUIRE(c16rtomb(buf, 0xdca9, &s) == (size_t)-1);
	ATF_REQUIRE(errno == EILSEQ);
	ATF_REQUIRE((unsigned char)buf[0] == 0xcc);
}

ATF_TC_WITHOUT_HEAD(c16rtomb_iso_8859_1_test);
ATF_TC_BODY(c16rtomb_iso_8859_1_test, tc)
{

	require_lc_ctype("en_US.ISO8859-1");

	/* Unicode character 'Euro sign'. */
	memset(&s, 0, sizeof(s));
	memset(buf, 0xcc, sizeof(buf));
	ATF_REQUIRE(c16rtomb(buf, 0x20ac, &s) == (size_t)-1);
	ATF_REQUIRE(errno == EILSEQ);
	ATF_REQUIRE((unsigned char)buf[0] == 0xcc);
}

ATF_TC_WITHOUT_HEAD(c16rtomb_iso_8859_15_test);
ATF_TC_BODY(c16rtomb_iso_8859_15_test, tc)
{

	require_lc_ctype("en_US.ISO8859-15");

	/* Unicode character 'Euro sign'. */
	memset(&s, 0, sizeof(s));
	memset(buf, 0xcc, sizeof(buf));
	ATF_REQUIRE(c16rtomb(buf, 0x20ac, &s) == 1);
	ATF_REQUIRE((unsigned char)buf[0] == 0xa4 && (unsigned char)buf[1] == 0xcc);
}

ATF_TC_WITHOUT_HEAD(c16rtomb_utf_8_test);
ATF_TC_BODY(c16rtomb_utf_8_test, tc)
{

	if (atf_tc_get_config_var_as_bool_wd(tc, "ci", false))
		atf_tc_skip("https://bugs.freebsd.org/265871");

	require_lc_ctype("en_US.UTF-8");

	/* Unicode character 'Pile of poo'. */
	memset(&s, 0, sizeof(s));
	memset(buf, 0xcc, sizeof(buf));
	ATF_REQUIRE(c16rtomb(buf, 0xd83d, &s) == 0);
	ATF_REQUIRE(c16rtomb(buf, 0xdca9, &s) == 4);
	ATF_REQUIRE((unsigned char)buf[0] == 0xf0 && (unsigned char)buf[1] == 0x9f &&
	    (unsigned char)buf[2] == 0x92 && (unsigned char)buf[3] == 0xa9 &&
	    (unsigned char)buf[4] == 0xcc);

	/* Invalid code; 'Pile of poo' without the trail surrogate. */
	memset(&s, 0, sizeof(s));
	memset(buf, 0xcc, sizeof(buf));
	ATF_REQUIRE(c16rtomb(buf, 0xd83d, &s) == 0);
	ATF_REQUIRE(c16rtomb(buf, L'A', &s) == (size_t)-1);
	ATF_REQUIRE(errno == EILSEQ);
	ATF_REQUIRE((unsigned char)buf[0] == 0xcc);

	/* Invalid code; 'Pile of poo' without the lead surrogate. */
	memset(&s, 0, sizeof(s));
	memset(buf, 0xcc, sizeof(buf));
	ATF_REQUIRE(c16rtomb(buf, 0xdca9, &s) == (size_t)-1);
	ATF_REQUIRE(errno == EILSEQ);
	ATF_REQUIRE((unsigned char)buf[0] == 0xcc);
}

ATF_TP_ADD_TCS(tp)
{

	ATF_TP_ADD_TC(tp, c16rtomb_c_locale_test);
	ATF_TP_ADD_TC(tp, c16rtomb_iso_8859_1_test);
	ATF_TP_ADD_TC(tp, c16rtomb_iso_8859_15_test);
	ATF_TP_ADD_TC(tp, c16rtomb_utf_8_test);

	return (atf_no_error());
}