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//============================================================
//
//  strconv.c - Win32 string conversion
//
//============================================================
//
//  Copyright Aaron Giles
//  All rights reserved.
//
//  Redistribution and use in source and binary forms, with or
//  without modification, are permitted provided that the
//  following conditions are met:
//
//    * Redistributions of source code must retain the above
//      copyright notice, this list of conditions and the
//      following disclaimer.
//    * 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.
//    * Neither the name 'MAME' nor the names of its
//      contributors may be used to endorse or promote
//      products derived from this software without specific
//      prior written permission.
//
//  THIS SOFTWARE IS PROVIDED BY AARON GILES ''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 AARON GILES BE LIABLE FOR ANY DIRECT,
//  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
//  DAMAGE (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.
//
//============================================================

// standard windows headers
#define WIN32_LEAN_AND_MEAN
#include <windows.h>

// MAMEOS headers
#include "strconv.h"
#include "unicode.h"


//============================================================
//  astring_from_utf8
//============================================================

CHAR *astring_from_utf8(const char *utf8string)
{
	WCHAR *wstring;
	int char_count;
	CHAR *result;

	// convert MAME string (UTF-8) to UTF-16
	char_count = MultiByteToWideChar(CP_UTF8, 0, utf8string, -1, NULL, 0);
	wstring = (WCHAR *)alloca(char_count * sizeof(*wstring));
	MultiByteToWideChar(CP_UTF8, 0, utf8string, -1, wstring, char_count);

	// convert UTF-16 to "ANSI code page" string
	char_count = WideCharToMultiByte(CP_ACP, 0, wstring, -1, NULL, 0, NULL, NULL);
	result = (CHAR *)osd_malloc_array(char_count * sizeof(*result));
	if (result != NULL)
		WideCharToMultiByte(CP_ACP, 0, wstring, -1, result, char_count, NULL, NULL);

	return result;
}


//============================================================
//  utf8_from_astring
//============================================================

char *utf8_from_astring(const CHAR *astring)
{
	WCHAR *wstring;
	int char_count;
	CHAR *result;

	// convert "ANSI code page" string to UTF-16
	char_count = MultiByteToWideChar(CP_ACP, 0, astring, -1, NULL, 0);
	wstring = (WCHAR *)alloca(char_count * sizeof(*wstring));
	MultiByteToWideChar(CP_ACP, 0, astring, -1, wstring, char_count);

	// convert UTF-16 to MAME string (UTF-8)
	char_count = WideCharToMultiByte(CP_UTF8, 0, wstring, -1, NULL, 0, NULL, NULL);
	result = (CHAR *)osd_malloc_array(char_count * sizeof(*result));
	if (result != NULL)
		WideCharToMultiByte(CP_UTF8, 0, wstring, -1, result, char_count, NULL, NULL);

	return result;
}


//============================================================
//  wstring_from_utf8
//============================================================

WCHAR *wstring_from_utf8(const char *utf8string)
{
	int char_count;
	WCHAR *result;

	// convert MAME string (UTF-8) to UTF-16
	char_count = MultiByteToWideChar(CP_UTF8, 0, utf8string, -1, NULL, 0);
	result = (WCHAR *)osd_malloc_array(char_count * sizeof(*result));
	if (result != NULL)
		MultiByteToWideChar(CP_UTF8, 0, utf8string, -1, result, char_count);

	return result;
}


//============================================================
//  utf8_from_wstring
//============================================================

char *utf8_from_wstring(const WCHAR *wstring)
{
	int char_count;
	char *result;

	// convert UTF-16 to MAME string (UTF-8)
	char_count = WideCharToMultiByte(CP_UTF8, 0, wstring, -1, NULL, 0, NULL, NULL);
	result = (char *)osd_malloc_array(char_count * sizeof(*result));
	if (result != NULL)
		WideCharToMultiByte(CP_UTF8, 0, wstring, -1, result, char_count, NULL, NULL);

	return result;
}