/*-
 * Copyright (c) 2011-2012 Michihiro NAKAJIMA
 * 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(S) ``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(S) 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.
 */
#include "test.h"

#include <locale.h>

#define __LIBARCHIVE_TEST
#include "archive_string.h"

/*
Execute the following to rebuild the data for this program:
   tail -n +36 test_archive_string_conversion.c | /bin/sh
#
# This requires http://unicode.org/Public/6.0.0/ucd/NormalizationTest.txt
#
if="NormalizationTest.txt"
if [ ! -f ${if} ]; then
  echo "Not found: \"${if}\""
  exit 0
fi
of=test_archive_string_conversion.txt.Z
awk -F ';'  '$0 ~/^[0-9A-F]+/ {printf "%s;%s\n", $2, $3}' ${if} | compress | uuencode ${of} > ${of}.uu
exit 1
*/

static int
unicode_to_utf8(char *p, uint32_t uc)
{        
        char *_p = p;

        /* Translate code point to UTF8 */
        if (uc <= 0x7f) {
                *p++ = (char)uc;
        } else if (uc <= 0x7ff) {
                *p++ = 0xc0 | ((uc >> 6) & 0x1f);
                *p++ = 0x80 | (uc & 0x3f);
        } else if (uc <= 0xffff) {
                *p++ = 0xe0 | ((uc >> 12) & 0x0f);
                *p++ = 0x80 | ((uc >> 6) & 0x3f);
                *p++ = 0x80 | (uc & 0x3f);
        } else {
                *p++ = 0xf0 | ((uc >> 18) & 0x07);
                *p++ = 0x80 | ((uc >> 12) & 0x3f);
                *p++ = 0x80 | ((uc >> 6) & 0x3f);
                *p++ = 0x80 | (uc & 0x3f);
        }
        return ((int)(p - _p));
}

static void
archive_be16enc(void *pp, uint16_t u)
{
        unsigned char *p = (unsigned char *)pp;

        p[0] = (u >> 8) & 0xff;
        p[1] = u & 0xff;
}

static int
unicode_to_utf16be(char *p, uint32_t uc)
{
	char *utf16 = p;

	if (uc > 0xffff) {
		/* We have a code point that won't fit into a
		 * wchar_t; convert it to a surrogate pair. */
		uc -= 0x10000;
		archive_be16enc(utf16, ((uc >> 10) & 0x3ff) + 0xD800);
		archive_be16enc(utf16+2, (uc & 0x3ff) + 0xDC00);
		return (4);
	} else {
		archive_be16enc(utf16, (uint16_t)uc);
		return (2);
	}
}

static void
archive_le16enc(void *pp, uint16_t u)
{
	unsigned char *p = (unsigned char *)pp;

	p[0] = u & 0xff;
	p[1] = (u >> 8) & 0xff;
}

static size_t
unicode_to_utf16le(char *p, uint32_t uc)
{
	char *utf16 = p;

	if (uc > 0xffff) {
		/* We have a code point that won't fit into a
		 * wchar_t; convert it to a surrogate pair. */
		uc -= 0x10000;
		archive_le16enc(utf16, ((uc >> 10) & 0x3ff) + 0xD800);
		archive_le16enc(utf16+2, (uc & 0x3ff) + 0xDC00);
		return (4);
	} else {
		archive_le16enc(utf16, (uint16_t)uc);
		return (2);
	}
}

static int
wc_size(void)
{
	return (sizeof(wchar_t));
}

static int
unicode_to_wc(wchar_t *wp, uint32_t uc)
{
	if (wc_size() == 4) {
		*wp = (wchar_t)uc;
		return (1);
	} 
	if (uc > 0xffff) {
		/* We have a code point that won't fit into a
		 * wchar_t; convert it to a surrogate pair. */
		uc -= 0x10000;
		*wp++ = (wchar_t)(((uc >> 10) & 0x3ff) + 0xD800);
		*wp = (wchar_t)((uc & 0x3ff) + 0xDC00);
		return (2);
	} else {
		*wp = (wchar_t)uc;
		return (1);
	}
}

/*
 * Note: U+2000 - U+2FFF, U+F900 - U+FAFF and U+2F800 - U+2FAFF are not
 * converted to NFD on Mac OS.
 * see also http://developer.apple.com/library/mac/#qa/qa2001/qa1173.html
 */
static int
scan_unicode_pattern(char *out, wchar_t *wout, char *u16be, char *u16le,
    const char *pattern, int mac_nfd)
{
	unsigned uc = 0;
	const char *p = pattern;
	char *op = out;
	wchar_t *owp = wout;
	char *op16be = u16be;
	char *op16le = u16le;
	int ret = 0;

	for (;;) {
		if (*p >= '0' && *p <= '9')
			uc = (uc << 4) + (*p - '0');
		else if (*p >= 'A' && *p <= 'F')
			uc = (uc << 4) + (*p - 'A' + 0x0a);
		else {
			if (mac_nfd && op == out) {
				/*
				 * These are not converted to NFD on Mac OS.
 				 * U+2000 - U+2FFF
				 * U+F900 - U+FAFF
				 * U+2F800 - U+2FAFF
				 */
				switch (uc) {
				case 0x2194: case 0x219A: case 0x219B:
				case 0x21AE: case 0x21CD: case 0x21CE:
				case 0x21CF: case 0x2204: case 0x2209:
				case 0x220C: case 0x2224: case 0x2226:
				case 0x2241: case 0x2244: case 0x2247:
				case 0x2249: case 0x2260: case 0x2262:
				case 0x226D: case 0x226E: case 0x226F:
				case 0x2270: case 0x2271: case 0x2274:
				case 0x2275: case 0x2276: case 0x2278:
				case 0x2279: case 0x227A: case 0x227B:
				case 0x2280: case 0x2281: case 0x2284:
				case 0x2285: case 0x2288: case 0x2289:
				case 0x22AC: case 0x22AD: case 0x22AE:
				case 0x22AF: case 0x22E0: case 0x22E1:
				case 0x22E2: case 0x22E3: case 0x22EA:
				case 0x22EB: case 0x22EC: case 0x22ED:
				
				/*
				 * Those code points are not converted to
				 * NFD on Mac OS. I do not know the reason
				 * because it is undocumented.
				 *   NFC        NFD
				 *   1109A  ==> 11099 110BA
				 *   1109C  ==> 1109B 110BA
				 *   110AB  ==> 110A5 110BA
				 */
				case 0x1109A: case 0x1109C: case 0x110AB:
					ret = 1;
					break;
				}
			}
			op16be += unicode_to_utf16be(op16be, uc);
			op16le += unicode_to_utf16le(op16le, uc);
			owp += unicode_to_wc(owp, uc);
			op += unicode_to_utf8(op, uc);
			if (!*p) {
				*op16be++ = 0;
				*op16be = 0;
				*op16le++ = 0;
				*op16le = 0;
				*owp = L'\0';
				*op = '\0';
				break;
			}
			uc = 0;
		}
		p++;
	}
	return (ret);
}

static int
is_wc_unicode(void)
{
#if defined(_WIN32) && !defined(__CYGWIN__)
	return (1);
#else
	return (0);
#endif
}

/*
 * A conversion test that we correctly normalize UTF-8 and UTF-16BE characters.
 * On Mac OS, the characters to be Form D.
 * On other platforms, the characters to be Form C.
 */
static void
test_archive_string_normalization_nfc(const char *testdata)
{
	struct archive *a, *a2;
	struct archive_string utf8;
	struct archive_mstring mstr;
	struct archive_string_conv *f_sconv8, *t_sconv8;
	struct archive_string_conv *f_sconv16be, *f_sconv16le;
	FILE *fp;
	char buff[512];
	int line = 0;
	int locale_is_utf8, wc_is_unicode;
	int sconv_opt = SCONV_SET_OPT_NORMALIZATION_C;

	locale_is_utf8 = (NULL != setlocale(LC_ALL, "en_US.UTF-8"));
	wc_is_unicode = is_wc_unicode();
	/* If it doesn't exist, just warn and return. */
	if (!locale_is_utf8 && !wc_is_unicode) {
		skipping("A test of string normalization for NFC requires "
		    "a suitable locale; en_US.UTF-8 not available on this "
		    "system");
		return;
	}

	archive_string_init(&utf8);
	memset(&mstr, 0, sizeof(mstr));

	/*
	 * Create string conversion objects.
	 */
	assert((a = archive_read_new()) != NULL);
	assertA(NULL != (f_sconv8 =
	    archive_string_conversion_from_charset(a, "UTF-8", 0)));
	assertA(NULL != (f_sconv16be =
	    archive_string_conversion_from_charset(a, "UTF-16BE", 0)));
	assertA(NULL != (f_sconv16le =
	    archive_string_conversion_from_charset(a, "UTF-16LE", 0)));
	assert((a2 = archive_write_new()) != NULL);
	assertA(NULL != (t_sconv8 =
	    archive_string_conversion_to_charset(a2, "UTF-8", 0)));
	if (f_sconv8 == NULL || f_sconv16be == NULL || f_sconv16le == NULL ||
	    t_sconv8 == NULL) {
		/* We cannot continue this test. */
		assertEqualInt(ARCHIVE_OK, archive_read_free(a));
		return;
	}
	archive_string_conversion_set_opt(f_sconv8, sconv_opt);
	archive_string_conversion_set_opt(f_sconv16be, sconv_opt);
	archive_string_conversion_set_opt(f_sconv16le, sconv_opt);
	archive_string_conversion_set_opt(t_sconv8, sconv_opt);

	/* Open a test pattern file. */
	assert((fp = fopen(testdata, "r")) != NULL);

	/*
	 * Read test data.
	 *  Test data format:
	 *     <NFC Unicode pattern> ';' <NFD Unicode pattern> '\n'
	 *  Unicode pattern format:
	 *     [0-9A-F]{4,5}([ ][0-9A-F]{4,5}){0,}
	 */
	while (fgets(buff, sizeof(buff), fp) != NULL) {
		char nfc[80], nfd[80];
		char utf8_nfc[80], utf8_nfd[80];
		char utf16be_nfc[80], utf16be_nfd[80];
		char utf16le_nfc[80], utf16le_nfd[80];
		wchar_t wc_nfc[40], wc_nfd[40];
		char *e, *p;
		const wchar_t *wp;
		const char *mp;
		size_t mplen;

		line++;
		if (buff[0] == '#')
			continue;
		p = strchr(buff, ';');
		if (p == NULL)
			continue;
		*p++ = '\0';
		/* Copy an NFC pattern */
		strncpy(nfc, buff, sizeof(nfc)-1);
		nfc[sizeof(nfc)-1] = '\0';
		e = p;
		p = strchr(p, '\n');
		if (p == NULL)
			continue;
		*p = '\0';
		/* Copy an NFD pattern */
		strncpy(nfd, e, sizeof(nfd)-1);
		nfd[sizeof(nfd)-1] = '\0';

		/*
		 * Get an NFC patterns.
		 */
		scan_unicode_pattern(utf8_nfc, wc_nfc, utf16be_nfc, utf16le_nfc,
		    nfc, 0);

		/*
		 * Get an NFD patterns.
		 */
		scan_unicode_pattern(utf8_nfd, wc_nfd, utf16be_nfd, utf16le_nfd,
		    nfd, 0);

		if (locale_is_utf8) {
			/*
			 * Normalize an NFD string for import.
			 */
			assertEqualInt(0, archive_strcpy_l(
			    &utf8, utf8_nfd, f_sconv8));
			failure("NFD(%s) should be converted to NFC(%s):%d",
			    nfd, nfc, line);
			assertEqualUTF8String(utf8_nfc, utf8.s);

			/*
			 * Normalize an NFC string for import.
			 */
			assertEqualInt(0, archive_strcpy_l(
			    &utf8, utf8_nfc, f_sconv8));
			failure("NFC(%s) should not be any changed:%d",
			    nfc, line);
			assertEqualUTF8String(utf8_nfc, utf8.s);

			/*
			 * Copy an NFC string for export.
			 */
			assertEqualInt(0, archive_strcpy_l(
			    &utf8, utf8_nfc, t_sconv8));
			failure("NFC(%s) should not be any changed:%d",
			    nfc, line);
			assertEqualUTF8String(utf8_nfc, utf8.s);

			/*
			 * Normalize an NFD string in UTF-16BE for import.
			 */
			assertEqualInt(0, archive_strncpy_l(
			    &utf8, utf16be_nfd, 100000, f_sconv16be));
			failure("NFD(%s) should be converted to NFC(%s):%d",
			    nfd, nfc, line);
			assertEqualUTF8String(utf8_nfc, utf8.s);

			/*
			 * Normalize an NFD string in UTF-16LE for import.
			 */
			assertEqualInt(0, archive_strncpy_l(
			    &utf8, utf16le_nfd, 100000, f_sconv16le));
			failure("NFD(%s) should be converted to NFC(%s):%d",
			    nfd, nfc, line);
			assertEqualUTF8String(utf8_nfc, utf8.s);
		}

		/*
		 * Test for archive_mstring interface.
		 * In specific, Windows platform UTF-16BE is directly
		 * converted to/from wide-character to avoid the effect of
		 * current locale since windows platform cannot make
		 * locale UTF-8.
		 */
		if (locale_is_utf8 || wc_is_unicode) {
			/*
			 * Normalize an NFD string in UTF-8 for import.
			 */
			assertEqualInt(0, archive_mstring_copy_mbs_len_l(
			    &mstr, utf8_nfd, 100000, f_sconv8));
			assertEqualInt(0,
			    archive_mstring_get_wcs(a, &mstr, &wp));
			failure("UTF-8 NFD(%s) should be converted "
			    "to WCS NFC(%s):%d", nfd, nfc, line);
			assertEqualWString(wc_nfc, wp);

			/*
			 * Normalize an NFD string in UTF-16BE for import.
			 */
			assertEqualInt(0, archive_mstring_copy_mbs_len_l(
			    &mstr, utf16be_nfd, 100000, f_sconv16be));
			assertEqualInt(0,
			    archive_mstring_get_wcs(a, &mstr, &wp));
			failure("UTF-8 NFD(%s) should be converted "
			    "to WCS NFC(%s):%d", nfd, nfc, line);
			assertEqualWString(wc_nfc, wp);

			/*
			 * Normalize an NFD string in UTF-16LE for import.
			 */
			assertEqualInt(0, archive_mstring_copy_mbs_len_l(
			    &mstr, utf16le_nfd, 100000, f_sconv16le));
			assertEqualInt(0,
			    archive_mstring_get_wcs(a, &mstr, &wp));
			failure("UTF-8 NFD(%s) should be converted "
			    "to WCS NFC(%s):%d", nfd, nfc, line);
			assertEqualWString(wc_nfc, wp);

			/*
			 * Copy an NFC wide-string for export.
			 */
			assertEqualInt(0,
			    archive_mstring_copy_wcs(&mstr, wc_nfc));
			assertEqualInt(0, archive_mstring_get_mbs_l(
			    a, &mstr, &mp, &mplen, t_sconv8));
			failure("WCS NFC(%s) should be UTF-8 NFC:%d"
			    ,nfc, line);
			assertEqualUTF8String(utf8_nfc, mp);
		}
	}

	archive_string_free(&utf8);
	archive_mstring_clean(&mstr);
	fclose(fp);
	assertEqualInt(ARCHIVE_OK, archive_read_free(a));
	assertEqualInt(ARCHIVE_OK, archive_write_free(a2));
}

static void
test_archive_string_normalization_mac_nfd(const char *testdata)
{
	struct archive *a, *a2;
	struct archive_string utf8;
	struct archive_mstring mstr;
	struct archive_string_conv *f_sconv8, *t_sconv8;
	struct archive_string_conv *f_sconv16be, *f_sconv16le;
	FILE *fp;
	char buff[512];
	int line = 0;
	int locale_is_utf8, wc_is_unicode;
	int sconv_opt = SCONV_SET_OPT_NORMALIZATION_D;

	locale_is_utf8 = (NULL != setlocale(LC_ALL, "en_US.UTF-8"));
	wc_is_unicode = is_wc_unicode();
	/* If it doesn't exist, just warn and return. */
	if (!locale_is_utf8 && !wc_is_unicode) {
		skipping("A test of string normalization for NFD requires "
		    "a suitable locale; en_US.UTF-8 not available on this "
		    "system");
		return;
	}

	archive_string_init(&utf8);
	memset(&mstr, 0, sizeof(mstr));

	/*
	 * Create string conversion objects.
	 */
	assert((a = archive_read_new()) != NULL);
	assertA(NULL != (f_sconv8 =
	    archive_string_conversion_from_charset(a, "UTF-8", 0)));
	assertA(NULL != (f_sconv16be =
	    archive_string_conversion_from_charset(a, "UTF-16BE", 0)));
	assertA(NULL != (f_sconv16le =
	    archive_string_conversion_from_charset(a, "UTF-16LE", 0)));
	assert((a2 = archive_write_new()) != NULL);
	assertA(NULL != (t_sconv8 =
	    archive_string_conversion_to_charset(a2, "UTF-8", 0)));
	if (f_sconv8 == NULL || f_sconv16be == NULL || f_sconv16le == NULL ||
	    t_sconv8 == NULL) {
		/* We cannot continue this test. */
		assertEqualInt(ARCHIVE_OK, archive_read_free(a));
		return;
	}
	archive_string_conversion_set_opt(f_sconv8, sconv_opt);
	archive_string_conversion_set_opt(f_sconv16be, sconv_opt);
	archive_string_conversion_set_opt(f_sconv16le, sconv_opt);
	archive_string_conversion_set_opt(t_sconv8, sconv_opt);

	/* Open a test pattern file. */
	assert((fp = fopen(testdata, "r")) != NULL);

	/*
	 * Read test data.
	 *  Test data format:
	 *     <NFC Unicode pattern> ';' <NFD Unicode pattern> '\n'
	 *  Unicode pattern format:
	 *     [0-9A-F]{4,5}([ ][0-9A-F]{4,5}){0,}
	 */
	while (fgets(buff, sizeof(buff), fp) != NULL) {
		char nfc[80], nfd[80];
		char utf8_nfc[80], utf8_nfd[80];
		char utf16be_nfc[80], utf16be_nfd[80];
		char utf16le_nfc[80], utf16le_nfd[80];
		wchar_t wc_nfc[40], wc_nfd[40];
		char *e, *p;
		const wchar_t *wp;
		const char *mp;
		size_t mplen;
		int should_be_nfc;

		line++;
		if (buff[0] == '#')
			continue;
		p = strchr(buff, ';');
		if (p == NULL)
			continue;
		*p++ = '\0';
		/* Copy an NFC pattern */
		strncpy(nfc, buff, sizeof(nfc)-1);
		nfc[sizeof(nfc)-1] = '\0';
		e = p;
		p = strchr(p, '\n');
		if (p == NULL)
			continue;
		*p = '\0';
		/* Copy an NFD pattern */
		strncpy(nfd, e, sizeof(nfd)-1);
		nfd[sizeof(nfd)-1] = '\0';

		/*
		 * Get an NFC patterns.
		 */
		should_be_nfc = scan_unicode_pattern(utf8_nfc, wc_nfc,
			utf16be_nfc, utf16le_nfc, nfc, 1);

		/*
		 * Get an NFD patterns.
		 */
		scan_unicode_pattern(utf8_nfd, wc_nfd, utf16be_nfd, utf16le_nfd,
		    nfd, 0);

		if (locale_is_utf8) {
			/*
			 * Normalize an NFC string for import.
			 */
			assertEqualInt(0, archive_strcpy_l(
			    &utf8, utf8_nfc, f_sconv8));
			if (should_be_nfc) {
				failure("NFC(%s) should not be converted to"
				    " NFD(%s):%d", nfc, nfd, line);
				assertEqualUTF8String(utf8_nfc, utf8.s);
			} else {
				failure("NFC(%s) should be converted to"
				    " NFD(%s):%d", nfc, nfd, line);
				assertEqualUTF8String(utf8_nfd, utf8.s);
			}

			/*
			 * Normalize an NFD string for import.
			 */
			assertEqualInt(0, archive_strcpy_l(
			    &utf8, utf8_nfd, f_sconv8));
			failure("NFD(%s) should not be any changed:%d",
			    nfd, line);
			assertEqualUTF8String(utf8_nfd, utf8.s);

			/*
			 * Copy an NFD string for export.
			 */
			assertEqualInt(0, archive_strcpy_l(
			    &utf8, utf8_nfd, t_sconv8));
			failure("NFD(%s) should not be any changed:%d",
			    nfd, line);
			assertEqualUTF8String(utf8_nfd, utf8.s);

			/*
			 * Normalize an NFC string in UTF-16BE for import.
			 */
			assertEqualInt(0, archive_strncpy_l(
			    &utf8, utf16be_nfc, 100000, f_sconv16be));
			if (should_be_nfc) {
				failure("NFC(%s) should not be converted to"
				    " NFD(%s):%d", nfc, nfd, line);
				assertEqualUTF8String(utf8_nfc, utf8.s);
			} else {
				failure("NFC(%s) should be converted to"
				    " NFD(%s):%d", nfc, nfd, line);
				assertEqualUTF8String(utf8_nfd, utf8.s);
			}

			/*
			 * Normalize an NFC string in UTF-16LE for import.
			 */
			assertEqualInt(0, archive_strncpy_l(
			    &utf8, utf16le_nfc, 100000, f_sconv16le));
			if (should_be_nfc) {
				failure("NFC(%s) should not be converted to"
				    " NFD(%s):%d", nfc, nfd, line);
				assertEqualUTF8String(utf8_nfc, utf8.s);
			} else {
				failure("NFC(%s) should be converted to"
				    " NFD(%s):%d", nfc, nfd, line);
				assertEqualUTF8String(utf8_nfd, utf8.s);
			}
		}

		/*
		 * Test for archive_mstring interface.
		 * In specific, Windows platform UTF-16BE is directly
		 * converted to/from wide-character to avoid the effect of
		 * current locale since windows platform cannot make
		 * locale UTF-8.
		 */
		if (locale_is_utf8 || wc_is_unicode) {
			/*
			 * Normalize an NFD string in UTF-8 for import.
			 */
			assertEqualInt(0, archive_mstring_copy_mbs_len_l(
			    &mstr, utf8_nfc, 100000, f_sconv8));
			assertEqualInt(0,
			    archive_mstring_get_wcs(a, &mstr, &wp));
			if (should_be_nfc) {
				failure("UTF-8 NFC(%s) should not be converted "
				    "to WCS NFD(%s):%d", nfc, nfd, line);
				assertEqualWString(wc_nfc, wp);
			} else {
				failure("UTF-8 NFC(%s) should be converted "
				    "to WCS NFD(%s):%d", nfc, nfd, line);
				assertEqualWString(wc_nfd, wp);
			}

			/*
			 * Normalize an NFD string in UTF-16BE for import.
			 */
			assertEqualInt(0, archive_mstring_copy_mbs_len_l(
			    &mstr, utf16be_nfc, 100000, f_sconv16be));
			assertEqualInt(0,
			    archive_mstring_get_wcs(a, &mstr, &wp));
			if (should_be_nfc) {
				failure("UTF-16BE NFC(%s) should not be "
				    "converted to WCS NFD(%s):%d",
				    nfc, nfd, line);
				assertEqualWString(wc_nfc, wp);
			} else {
				failure("UTF-16BE NFC(%s) should be converted "
				    "to WCS NFD(%s):%d", nfc, nfd, line);
				assertEqualWString(wc_nfd, wp);
			}

			/*
			 * Normalize an NFD string in UTF-16LE for import.
			 */
			assertEqualInt(0, archive_mstring_copy_mbs_len_l(
			    &mstr, utf16le_nfc, 100000, f_sconv16le));
			assertEqualInt(0,
			    archive_mstring_get_wcs(a, &mstr, &wp));
			if (should_be_nfc) {
				failure("UTF-16LE NFC(%s) should not be "
				    "converted to WCS NFD(%s):%d",
				    nfc, nfd, line);
				assertEqualWString(wc_nfc, wp);
			} else {
				failure("UTF-16LE NFC(%s) should be converted "
				    "to WCS NFD(%s):%d", nfc, nfd, line);
				assertEqualWString(wc_nfd, wp);
			}

			/*
			 * Copy an NFD wide-string for export.
			 */
			assertEqualInt(0, archive_mstring_copy_wcs(
			    &mstr, wc_nfd));
			assertEqualInt(0, archive_mstring_get_mbs_l(
			    a, &mstr, &mp, &mplen, t_sconv8));
			failure("WCS NFD(%s) should be UTF-8 NFD:%d"
			    ,nfd, line);
			assertEqualUTF8String(utf8_nfd, mp);
		}
	}

	archive_string_free(&utf8);
	archive_mstring_clean(&mstr);
	fclose(fp);
	assertEqualInt(ARCHIVE_OK, archive_read_free(a));
	assertEqualInt(ARCHIVE_OK, archive_write_free(a2));
}

static void
test_archive_string_canonicalization(void)
{
	struct archive *a;
	struct archive_string_conv *sconv;

	setlocale(LC_ALL, "en_US.UTF-8");

	assert((a = archive_read_new()) != NULL);

	assertA(NULL != (sconv =
	    archive_string_conversion_to_charset(a, "UTF-8", 1)));
	failure("Charset name should be UTF-8");
	assertEqualString("UTF-8",
	    archive_string_conversion_charset_name(sconv));

	assertA(NULL != (sconv =
	    archive_string_conversion_to_charset(a, "UTF8", 1)));
	failure("Charset name should be UTF-8");
	assertEqualString("UTF-8",
	    archive_string_conversion_charset_name(sconv));

	assertA(NULL != (sconv =
	    archive_string_conversion_to_charset(a, "utf8", 1)));
	failure("Charset name should be UTF-8");
	assertEqualString("UTF-8",
	    archive_string_conversion_charset_name(sconv));

	assertA(NULL != (sconv =
	    archive_string_conversion_to_charset(a, "UTF-16BE", 1)));
	failure("Charset name should be UTF-16BE");
	assertEqualString("UTF-16BE",
	    archive_string_conversion_charset_name(sconv));

	assertA(NULL != (sconv =
	    archive_string_conversion_to_charset(a, "UTF16BE", 1)));
	failure("Charset name should be UTF-16BE");
	assertEqualString("UTF-16BE",
	    archive_string_conversion_charset_name(sconv));

	assertA(NULL != (sconv =
	    archive_string_conversion_to_charset(a, "utf16be", 1)));
	failure("Charset name should be UTF-16BE");
	assertEqualString("UTF-16BE",
	    archive_string_conversion_charset_name(sconv));

	assertA(NULL != (sconv =
	    archive_string_conversion_to_charset(a, "UTF-16LE", 1)));
	failure("Charset name should be UTF-16LE");
	assertEqualString("UTF-16LE",
	    archive_string_conversion_charset_name(sconv));

	assertA(NULL != (sconv =
	    archive_string_conversion_to_charset(a, "UTF16LE", 1)));
	failure("Charset name should be UTF-16LE");
	assertEqualString("UTF-16LE",
	    archive_string_conversion_charset_name(sconv));

	assertA(NULL != (sconv =
	    archive_string_conversion_to_charset(a, "utf16le", 1)));
	failure("Charset name should be UTF-16LE");
	assertEqualString("UTF-16LE",
	    archive_string_conversion_charset_name(sconv));

	assertEqualInt(ARCHIVE_OK, archive_read_free(a));

}

static void
check_string(struct archive *a, struct archive_mstring *mstr, struct archive_string_conv *sc,
  const char *exp, const wchar_t *wexp)
{
	/* Do all the tests on a copy so that we can have a clear initial state every time */
	struct archive_mstring mstr2;
	const char *p = NULL;
	const wchar_t *wp = NULL;
	size_t len = 0;

	memset(&mstr2, 0, sizeof(mstr2));

	archive_mstring_copy(&mstr2, mstr);
	assertEqualInt(0, archive_mstring_get_mbs(a, &mstr2, &p));
	assertEqualString(exp, p);
	p = NULL;

	archive_mstring_copy(&mstr2, mstr);
	assertEqualInt(0, archive_mstring_get_utf8(a, &mstr2, &p));
	assertEqualString(exp, p);
	p = NULL;

	archive_mstring_copy(&mstr2, mstr);
	assertEqualInt(0, archive_mstring_get_wcs(a, &mstr2, &wp));
	assertEqualWString(wexp, wp);
	wp = NULL;

	archive_mstring_copy(&mstr2, mstr);
	assertEqualInt(0, archive_mstring_get_mbs_l(a, &mstr2, &p, &len, sc));
	assertEqualString(exp, p);
	assertEqualInt(len, strlen(exp));
	p = NULL;
	len = 0;

	archive_mstring_clean(&mstr2);
}

/*
 * Make sure no matter what the input encoding is, the string can be
 * converted too all the output encodings.
 */
static void
test_archive_string_set_get(void)
{
	struct archive *a;
	struct archive_mstring mstr;
	struct archive_string_conv *sc;

	setlocale(LC_ALL, "en_US.UTF-8");

	assert((a = archive_read_new()) != NULL);
	memset(&mstr, 0, sizeof(mstr));

	assertA(NULL != (sc =
	    archive_string_conversion_to_charset(a, "UTF-8", 1)));
	failure("Charset name should be UTF-8");
	assertEqualString("UTF-8",
	    archive_string_conversion_charset_name(sc));

	assertEqualInt(0, archive_mstring_copy_mbs(&mstr, "AAA"));
	check_string(a, &mstr, sc, "AAA", L"AAA");
	assertEqualInt(4, archive_mstring_copy_utf8(&mstr, "BBBB"));
	check_string(a, &mstr, sc, "BBBB", L"BBBB");
	assertEqualInt(0, archive_mstring_copy_wcs(&mstr, L"CCC12"));
	check_string(a, &mstr, sc, "CCC12", L"CCC12");
	assertEqualInt(0, archive_mstring_copy_mbs_len_l(&mstr, "DDDD-l", 6, sc));
	check_string(a, &mstr, sc, "DDDD-l", L"DDDD-l");
	assertEqualInt(0, archive_mstring_update_utf8(a, &mstr, "EEEEE---H"));
	check_string(a, &mstr, sc, "EEEEE---H", L"EEEEE---H");

        archive_mstring_clean(&mstr);
	assertEqualInt(ARCHIVE_OK, archive_read_free(a));

}

DEFINE_TEST(test_archive_string_conversion)
{
	static const char reffile[] = "test_archive_string_conversion.txt.Z";
	static const char testdata[] = "testdata.txt";
	struct archive *a;
	struct archive_entry *ae;
	char buff[512];
	ssize_t size;
	FILE *fp;

	/*
	 * Extract a test pattern file.
	 */
	extract_reference_file(reffile);
	assert((a = archive_read_new()) != NULL);
	assertEqualIntA(a, ARCHIVE_OK, archive_read_support_filter_all(a));
	assertEqualIntA(a, ARCHIVE_OK, archive_read_support_format_raw(a));
        assertEqualIntA(a, ARCHIVE_OK,
            archive_read_open_filename(a, reffile, 512));

	assertEqualIntA(a, ARCHIVE_OK, archive_read_next_header(a, &ae));
	assert((fp = fopen(testdata, "w")) != NULL);
	while ((size = archive_read_data(a, buff, 512)) > 0)
		assertEqualInt(size, fwrite(buff, 1, size, fp));
	assertEqualInt(0, fclose(fp));
	assertEqualInt(ARCHIVE_OK, archive_read_free(a));

	test_archive_string_normalization_nfc(testdata);
	test_archive_string_normalization_mac_nfd(testdata);
	test_archive_string_canonicalization();
	test_archive_string_set_get();
}

DEFINE_TEST(test_archive_string_conversion_utf16_utf8)
{
#if !defined(_WIN32) || defined(__CYGWIN__)
	skipping("This test is meant to verify unicode string handling on Windows");
#else
	struct archive_mstring mstr;
	const char* utf8_string;

	memset(&mstr, 0, sizeof(mstr));

	assertEqualInt(ARCHIVE_OK,
	    archive_mstring_copy_wcs(&mstr, L"\U0000043f\U00000440\U00000438"));

	/* Conversion from WCS to UTF-8 should always succeed */
	assertEqualInt(ARCHIVE_OK,
	    archive_mstring_get_utf8(NULL, &mstr, &utf8_string));
	assertEqualString("\xD0\xBF\xD1\x80\xD0\xB8", utf8_string);

	archive_mstring_clean(&mstr);
#endif
}

DEFINE_TEST(test_archive_string_conversion_utf8_utf16)
{
#if !defined(_WIN32) || defined(__CYGWIN__)
	skipping("This test is meant to verify unicode string handling on Windows");
#else
	struct archive_mstring mstr;
	const wchar_t* wcs_string;

	memset(&mstr, 0, sizeof(mstr));

	assertEqualInt(6,
	    archive_mstring_copy_utf8(&mstr, "\xD0\xBF\xD1\x80\xD0\xB8"));

	/* Conversion from UTF-8 to WCS should always succeed */
	assertEqualInt(ARCHIVE_OK,
	    archive_mstring_get_wcs(NULL, &mstr, &wcs_string));
	assertEqualWString(L"\U0000043f\U00000440\U00000438", wcs_string);

	archive_mstring_clean(&mstr);
#endif
}

DEFINE_TEST(test_archive_string_update_utf8_win)
{
#if !defined(_WIN32) || defined(__CYGWIN__)
	skipping("This test is meant to verify unicode string handling on Windows"
	    " with the C locale");
#else
	static const char utf8_string[] = "\xD0\xBF\xD1\x80\xD0\xB8";
	static const wchar_t wcs_string[] = L"\U0000043f\U00000440\U00000438";
	struct archive_mstring mstr;
	int r;

	memset(&mstr, 0, sizeof(mstr));

	r = archive_mstring_update_utf8(NULL, &mstr, utf8_string);

	/* On Windows, this should reliably fail with the C locale */
	assertEqualInt(-1, r);
	assertEqualInt(0, mstr.aes_set & AES_SET_MBS);

	/* NOTE: We access the internals to validate that they were set by the
	 *       'archive_mstring_update_utf8' function */
	/* UTF-8 should always be set */
	assertEqualInt(AES_SET_UTF8, mstr.aes_set & AES_SET_UTF8);
	assertEqualString(utf8_string, mstr.aes_utf8.s);
	/* WCS should always be set as well */
	assertEqualInt(AES_SET_WCS, mstr.aes_set & AES_SET_WCS);
	assertEqualWString(wcs_string, mstr.aes_wcs.s);

	archive_mstring_clean(&mstr);
#endif
}

DEFINE_TEST(test_archive_string_update_utf8_utf8)
{
	static const char utf8_string[] = "\xD0\xBF\xD1\x80\xD0\xB8";
	static const wchar_t wcs_string[] = L"\U0000043f\U00000440\U00000438";
	struct archive_mstring mstr;
	int r;

	memset(&mstr, 0, sizeof(mstr));

	if (setlocale(LC_ALL, "en_US.UTF-8") == NULL) {
		skipping("UTF-8 not supported on this system.");
		return;
	}

	r = archive_mstring_update_utf8(NULL, &mstr, utf8_string);

	/* All conversions should have succeeded */
	assertEqualInt(0, r);
	assertEqualInt(AES_SET_MBS | AES_SET_WCS | AES_SET_UTF8, mstr.aes_set);
	assertEqualString(utf8_string, mstr.aes_utf8.s);
	assertEqualString(utf8_string, mstr.aes_mbs.s);
	assertEqualWString(wcs_string, mstr.aes_wcs.s);

	archive_mstring_clean(&mstr);
}

DEFINE_TEST(test_archive_string_update_utf8_koi8)
{
	static const char utf8_string[] = "\xD0\xBF\xD1\x80\xD0\xB8";
	static const char koi8_string[] = "\xD0\xD2\xC9";
	static const wchar_t wcs_string[] = L"\U0000043f\U00000440\U00000438";
	struct archive_mstring mstr;
	struct archive *a;
	int r;

	memset(&mstr, 0, sizeof(mstr));

	if (setlocale(LC_ALL, "ru_RU.KOI8-R") == NULL) {
		skipping("KOI8-R locale not available on this system.");
		return;
	}
	a = archive_write_new();
	assertEqualInt(ARCHIVE_OK, archive_write_set_format_pax(a));
	if (archive_write_set_options(a, "hdrcharset=UTF-8") != ARCHIVE_OK) {
		skipping("This system cannot convert character-set"
		    " from KOI8-R to UTF-8.");
		archive_write_free(a);
		return;
	}
	archive_write_free(a);

	r = archive_mstring_update_utf8(NULL, &mstr, utf8_string);

	/* All conversions should have succeeded */
	assertEqualInt(0, r);
	assertEqualInt(AES_SET_MBS | AES_SET_WCS | AES_SET_UTF8, mstr.aes_set);
	assertEqualString(utf8_string, mstr.aes_utf8.s);
	assertEqualString(koi8_string, mstr.aes_mbs.s);
#if defined(_WIN32) && !defined(__CYGWIN__)
	assertEqualWString(wcs_string, mstr.aes_wcs.s);
#else
	/* No guarantee of how WCS strings behave, however this test test is
	 * primarily meant for Windows */
	(void)wcs_string;
#endif

	archive_mstring_clean(&mstr);
}
