/*
 * Copyright (C) 1994-1998 T. Teranishi
 * (C) 2006- TeraTerm Project
 * 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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.
 */

/* misc. routines  */

#include <sys/stat.h>
#include <sys/utime.h>
#include <string.h>
#include <time.h>
#include <stdio.h>
#include <shlobj.h>
#include <ctype.h>
#include <assert.h>
#if !defined(_CRTDBG_MAP_ALLOC)
#define _CRTDBG_MAP_ALLOC
#endif
#include <stdlib.h>
#include <crtdbg.h>

#include "teraterm.h"
#include "tttypes.h"
#include "compat_win.h"
#include "codeconv.h"
#include "ttlib.h"
#include "ttcommdlg.h"

// このファイルはいくつかのプロジェクトに追加されて直接コンパイル,リンクされている
// common_static は lib として作成されて他のプロジェクトにでリンクされている

// for b64encode/b64decode
static char *b64enc_table = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static char b64dec_table[] = {
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
   52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
   -1,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
   15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
   -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
   41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};

void b64encode(PCHAR d, int dsize, PCHAR s, int len)
{
	unsigned int b = 0;
	int state = 0;
	unsigned char *src, *dst;

	src = (unsigned char *)s;
	dst = (unsigned char *)d;

	if (dsize == 0 || dst == NULL || src == NULL) {
		return;
	}
	if (dsize < 5) {
		*dst = 0;
		return;
	}

	while (len > 0) {
		b = (b << 8) | *src++;
		len--;
		state++;

		if (state == 3) {
			*dst++ = b64enc_table[(b>>18) & 0x3f];
			*dst++ = b64enc_table[(b>>12) & 0x3f];
			*dst++ = b64enc_table[(b>>6) & 0x3f];
			*dst++ = b64enc_table[b & 0x3f];
			dsize -= 4;
			state = 0;
			b = 0;
			if (dsize < 5)
				break;
		}
	}

	if (dsize >= 5) {
		if (state == 1) {
			*dst++ = b64enc_table[(b>>2) & 0x3f];
			*dst++ = b64enc_table[(b<<4) & 0x3f];
			*dst++ = '=';
			*dst++ = '=';
		}
		else if (state == 2) {
			*dst++ = b64enc_table[(b>>10) & 0x3f];
			*dst++ = b64enc_table[(b>>4) & 0x3f];
			*dst++ = b64enc_table[(b<<2) & 0x3f];
			*dst++ = '=';
		}
	}

	*dst = 0;
	return;
}

int b64decode(PCHAR dst, int dsize, PCHAR src)
{
	unsigned int b = 0;
	char c;
	int len = 0, state = 0;

	if (src == NULL || dst == NULL || dsize == 0)
		return -1;

	while (1) {
		if (isspace(*src)) {
			src++;
			continue;
		}

		if ((c = b64dec_table[*src++]) == -1)
			break;

		b = (b << 6) | c;
		state++;

		if (state == 4) {
			if (dsize > len)
				dst[len++] = (b >> 16) & 0xff;
			if (dsize > len)
				dst[len++] = (b >> 8) & 0xff;
			if (dsize > len)
				dst[len++] = b & 0xff;
			state = 0;
			if (dsize <= len)
				break;
		}
	}

	if (state == 2) {
		b <<= 4;
		if (dsize > len)
			dst[len++] = (b >> 8) & 0xff;
	}
	else if (state == 3) {
		b <<= 6;
		if (dsize > len)
			dst[len++] = (b >> 16) & 0xff;
		if (dsize > len)
			dst[len++] = (b >> 8) & 0xff;
	}
	if (len < dsize) {
		dst[len] = 0;
	}
	else {
		dst[dsize-1] = 0;
	}
	return len;
}

/**
 *	ファイル名(パス名)を解析する
 *	_splitpathのパスとファイル名だけ版
 *
 *	@param[in]	PathName	ファイル名、フルパス
 *	@param[out]	DirLen		末尾のスラッシュを含むディレクトリパス長
 *							NULLのとき値を返さない
 *	@param[out]	FNPos		ファイル名へのindex
 *							&PathName[FNPos] がファイル名
 *							NULLのとき値を返さない
 *	@retval		FALSE		PathNameが不正
 */
BOOL GetFileNamePos(const char *PathName, int *DirLen, int *FNPos)
{
	BYTE b;
	const char *Ptr;
	const char *DirPtr;
	const char *FNPtr;
	const char *PtrOld;

	if (DirLen != NULL) *DirLen = 0;
	if (FNPos != NULL) *FNPos = 0;

	if (PathName==NULL)
		return FALSE;

	if ((strlen(PathName)>=2) && (PathName[1]==':'))
		Ptr = &PathName[2];
	else
		Ptr = PathName;
	if (Ptr[0]=='\\' || Ptr[0]=='/')
		Ptr = CharNext(Ptr);

	DirPtr = Ptr;
	FNPtr = Ptr;
	while (Ptr[0]!=0) {
		b = Ptr[0];
		PtrOld = Ptr;
		Ptr = CharNext(Ptr);
		switch (b) {
			case ':':
				return FALSE;
			case '/':	/* FALLTHROUGH */
			case '\\':
				DirPtr = PtrOld;
				FNPtr = Ptr;
				break;
		}
	}
	if (DirLen != NULL) *DirLen = DirPtr-PathName;
	if (FNPos != NULL) *FNPos = FNPtr-PathName;
	return TRUE;
}

BOOL ExtractFileName(PCHAR PathName, PCHAR FileName, int destlen)
{
	int i, j;

	if (FileName==NULL)
		return FALSE;
	if (! GetFileNamePos(PathName,&i,&j))
		return FALSE;
	strncpy_s(FileName,destlen,&PathName[j],_TRUNCATE);
	return (strlen(FileName)>0);
}

BOOL ExtractDirName(PCHAR PathName, PCHAR DirName)
{
	int i, j;

	if (DirName==NULL)
		return FALSE;
	if (! GetFileNamePos(PathName,&i,&j))
		return FALSE;
	memmove(DirName,PathName,i); // do not use memcpy
	DirName[i] = 0;
	return TRUE;
}

/* fit a filename to the windows-filename format */
/* FileName must contain filename part only. */
void FitFileName(PCHAR FileName, int destlen, const char *DefExt)
{
	int i, j, NumOfDots;
	char Temp[MAX_PATH];
	BYTE b;

	NumOfDots = 0;
	i = 0;
	j = 0;
	/* filename started with a dot is illeagal */
	if (FileName[0]=='.') {
		Temp[0] = '_';  /* insert an underscore char */
		j++;
	}

	do {
		b = FileName[i];
		i++;
		if (b=='.')
			NumOfDots++;
		if ((b!=0) &&
		    (j < MAX_PATH-1)) {
			Temp[j] = b;
			j++;
		}
	} while (b!=0);
	Temp[j] = 0;

	if ((NumOfDots==0) &&
	    (DefExt!=NULL)) {
		/* add the default extension */
		strncat_s(Temp,sizeof(Temp),DefExt,_TRUNCATE);
	}

	strncpy_s(FileName,destlen,Temp,_TRUNCATE);
}

// Append a slash to the end of a path name
void AppendSlash(PCHAR Path, int destlen)
{
	if (strcmp(CharPrev((LPCTSTR)Path,
	           (LPCTSTR)(&Path[strlen(Path)])),
	           "\\") != 0) {
		strncat_s(Path,destlen,"\\",_TRUNCATE);
	}
}

/**
 * Delete slashes at the end of a path name
 *
 *	@return	行末の '\' が削除された文字列
 *			不要になったら free() すること
 */
wchar_t *DeleteSlashW(const wchar_t *Path)
{
	wchar_t *s = _wcsdup(Path);
	size_t i = wcslen(s);
	while(i != 0) {
		i--;
		if (s[i] == '\\') {
			s[i] = '\0';
		}
		else {
			break;
		}
	}
	return s;
}

// Delete slashes at the end of a path name
void DeleteSlash(PCHAR Path)
{
	wchar_t *PathW = ToWcharA(Path);
	wchar_t *deletedW = DeleteSlashW(PathW);
	char *deletedA = ToCharW(deletedW);
	strcpy(Path, deletedA);
	free(deletedA);
	free(deletedW);
	free(PathW);
}

void Str2Hex(PCHAR Str, PCHAR Hex, int Len, int MaxHexLen, BOOL ConvSP)
{
	BYTE b, low;
	int i, j;

	if (ConvSP)
		low = 0x20;
	else
		low = 0x1F;

	j = 0;
	for (i=0; i<=Len-1; i++) {
		b = Str[i];
		if ((b!='$') && (b>low) && (b<0x7f)) {
			if (j < MaxHexLen) {
				Hex[j] = b;
				j++;
			}
		}
		else {
			if (j < MaxHexLen-2) {
				Hex[j] = '$';
				j++;
				if (b<=0x9f) {
					Hex[j] = (char)((b >> 4) + 0x30);
				}
				else {
					Hex[j] = (char)((b >> 4) + 0x37);
				}
				j++;
				if ((b & 0x0f) <= 0x9) {
					Hex[j] = (char)((b & 0x0f) + 0x30);
				}
				else {
					Hex[j] = (char)((b & 0x0f) + 0x37);
				}
				j++;
			}
		}
	}
	Hex[j] = 0;
}

BYTE ConvHexChar(BYTE b)
{
	if ((b>='0') && (b<='9')) {
		return (b - 0x30);
	}
	else if ((b>='A') && (b<='F')) {
		return (b - 0x37);
	}
	else if ((b>='a') && (b<='f')) {
		return (b - 0x57);
	}
	else {
		return 0;
	}
}

int Hex2Str(PCHAR Hex, PCHAR Str, int MaxLen)
{
	BYTE b, c;
	int i, imax, j;

	j = 0;
	imax = strlen(Hex);
	i = 0;
	while ((i < imax) && (j<MaxLen)) {
		b = Hex[i];
		if (b=='$') {
			i++;
			if (i < imax) {
				c = Hex[i];
			}
			else {
				c = 0x30;
			}
			b = ConvHexChar(c) << 4;
			i++;
			if (i < imax) {
				c = Hex[i];
			}
			else {
				c = 0x30;
			}
			b = b + ConvHexChar(c);
		};

		Str[j] = b;
		j++;
		i++;
	}
	if (j<MaxLen) {
		Str[j] = 0;
	}

	return j;
}

BOOL DoesFileExist(const char *FName)
{
	// check if a file exists or not
	// フォルダまたはファイルがあれば TRUE を返す
	struct _stat st;

	return (_stat(FName,&st)==0);
}

/**
 *	check if a folder exists or not
 *	マクロ互換性のため
 *	DoesFileExist() は従来通りフォルダまたはファイルがあれば TRUE を返し
 *  DoesFolderExist() はフォルダがある場合のみ TRUE を返す。
 */
BOOL DoesFolderExistW(const wchar_t *FName)
{
	const DWORD r = GetFileAttributesW(FName);
	if (r == INVALID_FILE_ATTRIBUTES) {
		return FALSE;
	}
	if (r & FILE_ATTRIBUTE_DIRECTORY) {
		return TRUE;
	}
	return FALSE;
}

BOOL DoesFolderExist(const char *FName)
{
	wchar_t *FNameW = ToWcharA(FName);
	BOOL r = DoesFolderExistW(FNameW);
	free(FNameW);
	return r;
}

long GetFSize(const char *FName)
{
	unsigned long long size = GetFSize64A(FName);
	return (long)size;
}

long GetFMtime(const char *FName)
{
	struct _stat st;

	if (_stat(FName,&st)==-1) {
		return 0;
	}
	return (long)st.st_mtime;
}

BOOL SetFMtime(const char *FName, DWORD mtime)
{
	struct _utimbuf filetime;

	filetime.actime = mtime;
	filetime.modtime = mtime;
	return _utime(FName, &filetime);
}

void uint2str(UINT i, PCHAR Str, int destlen, int len)
{
	char Temp[20];

	memset(Temp, 0, sizeof(Temp));
	_snprintf_s(Temp,sizeof(Temp),_TRUNCATE,"%u",i);
	Temp[len] = 0;
	strncpy_s(Str,destlen,Temp,_TRUNCATE);
}

void QuoteFName(PCHAR FName)
{
	int i;

	if (FName[0]==0) {
		return;
	}
	if (strchr(FName,' ')==NULL) {
		return;
	}
	i = strlen(FName);
	memmove(&(FName[1]),FName,i);
	FName[0] = '\"';
	FName[i+1] = '\"';
	FName[i+2] = 0;
}

// ファイル名に使用できない文字が含まれているか確かめる (2006.8.28 maya)
int isInvalidFileNameChar(const char *FName)
{
	wchar_t *FNameW = ToWcharA(FName);
	int r = isInvalidFileNameCharW(FNameW);
	free(FNameW);
	return (int)r;
}

// ファイル名に使用できない文字を c に置き換える
// c に 0 を指定した場合は文字を削除する
void replaceInvalidFileNameChar(PCHAR FName, unsigned char c)
{
	wchar_t *FNameW = ToWcharA(FName);
	wchar_t *new_fnameW = replaceInvalidFileNameCharW(FNameW, c);
	char *new_fnameA = ToCharW(new_fnameW);
	strcpy(FName, new_fnameA);
	free(new_fnameA);
	free(new_fnameW);
	free(FNameW);
}


// strftime に渡せない文字が含まれているか確かめる (2006.8.28 maya)
int isInvalidStrftimeChar(PCHAR format)
{
	wchar_t *formatW = ToWcharA(format);
	int r = isInvalidStrftimeCharW(formatW);
	free(formatW);
	return (int)r;
}

// strftime に渡せない文字を削除する
void deleteInvalidStrftimeChar(PCHAR FName)
{
	const size_t len = strlen(FName);
	wchar_t *FNameW = ToWcharA(FName);
	deleteInvalidStrftimeCharW(FNameW);
	WideCharToACP_t(FNameW, FName, len);
	free(FNameW);
}

// フルパスから、ファイル名部分のみを strftime で変換する (2006.8.28 maya)
void ParseStrftimeFileName(PCHAR FName, int destlen)
{
	char filename[MAX_PATH];
	char dirname[MAX_PATH];
	char buf[MAX_PATH];
	char *c;
	time_t time_local;
	struct tm tm_local;

	// ファイル名部分のみを flename に格納
	ExtractFileName(FName, filename ,sizeof(filename));

	// strftime に使用できない文字を削除
	deleteInvalidStrftimeChar(filename);

	// 現在時刻を取得
	time(&time_local);
	localtime_s(&tm_local, &time_local);

	// 時刻文字列に変換
	if (strftime(buf, sizeof(buf), filename, &tm_local) == 0) {
		strncpy_s(buf, sizeof(buf), filename, _TRUNCATE);
	}

	// ファイル名に使用できない文字を削除
	deleteInvalidFileNameChar(buf);

	c = strrchr(FName, '\\');
	if (c != NULL) {
		ExtractDirName(FName, dirname);
		strncpy_s(FName, destlen, dirname, _TRUNCATE);
		AppendSlash(FName,destlen);
		strncat_s(FName, destlen, buf, _TRUNCATE);
	}
	else { // "\"を含まない(フルパスでない)場合に対応 (2006.11.30 maya)
		strncpy_s(FName, destlen, buf, _TRUNCATE);
	}
}

#if 0
void ConvFName(const char *HomeDir, PCHAR Temp, int templen, const char *DefExt, PCHAR FName, int destlen)
{
	// destlen = sizeof FName
	int DirLen, FNPos;

	FName[0] = 0;
	if ( ! GetFileNamePos(Temp,&DirLen,&FNPos) ) {
		return;
	}
	FitFileName(&Temp[FNPos],templen - FNPos,DefExt);
	if ( DirLen==0 ) {
		strncpy_s(FName,destlen,HomeDir,_TRUNCATE);
		AppendSlash(FName,destlen);
	}
	strncat_s(FName,destlen,Temp,_TRUNCATE);
}
#endif

// "\n" を改行に変換する (2006.7.29 maya)
// "\t" をタブに変換する (2006.11.6 maya)
void RestoreNewLine(PCHAR Text)
{
	int i, j=0, size=strlen(Text);
	char *buf = (char *)_alloca(size+1);

	memset(buf, 0, size+1);
	for (i=0; i<size; i++) {
		if (Text[i] == '\\' && i<size ) {
			switch (Text[i+1]) {
				case '\\':
					buf[j] = '\\';
					i++;
					break;
				case 'n':
					buf[j] = '\n';
					i++;
					break;
				case 't':
					buf[j] = '\t';
					i++;
					break;
				case '0':
					buf[j] = '\0';
					i++;
					break;
				default:
					buf[j] = '\\';
			}
			j++;
		}
		else {
			buf[j] = Text[i];
			j++;
		}
	}
	/* use memcpy to copy with '\0' */
	memcpy(Text, buf, size);
}

void GetDownloadFolder(char *dest, int destlen)
{
	wchar_t *download = GetDownloadFolderW();
	WideCharToACP_t(download, dest, destlen);
	free(download);
}

/*
 *	UILanguageFileのフルパスを取得する
 *
 *	@param[in]		HomeDir					exe,dllの存在するフォルダ GetHomeDir()で取得できる
 *	@param[in]		UILanguageFileRel		lngファイル、HomeDirからの相対パス
 *	@param[in,out]	UILanguageFileFull		lngファイルptr、フルパス
 *	@param[in]		UILanguageFileFullLen	lngファイルlen、フルパス
 */
void GetUILanguageFileFull(const char *HomeDir, const char *UILanguageFileRel,
						   char *UILanguageFileFull, size_t UILanguageFileFullLen)
{
	char CurDir[MAX_PATH];

	/* Get UILanguageFile Full Path */
	GetCurrentDirectory(sizeof(CurDir), CurDir);
	SetCurrentDirectory(HomeDir);
	_fullpath(UILanguageFileFull, UILanguageFileRel, UILanguageFileFullLen);
	SetCurrentDirectory(CurDir);
}

// 指定したエントリを teraterm.ini から読み取る (2009.3.23 yutaka)
void GetOnOffEntryInifile(char *entry, char *buf, int buflen)
{
	wchar_t *HomeDirW;
	wchar_t Temp[MAX_PATH];
	wchar_t *SetupFName;
	wchar_t *entryW = ToWcharA(entry);
	char * TempA;

	/* Get home directory */
	HomeDirW = GetHomeDirW(NULL);

	/* Get SetupFName */
	SetupFName = GetDefaultSetupFNameW(HomeDirW);

	/* Get LanguageFile name */
	GetPrivateProfileStringW(L"Tera Term", entryW, L"off",
							 Temp, _countof(Temp), SetupFName);

	TempA = ToCharW(Temp);
	strncpy_s(buf, buflen, TempA, _TRUNCATE);
	free(HomeDirW);
	free(SetupFName);
	free(TempA);
}

void get_lang_msgW(const char *key, wchar_t *buf, int buf_len, const wchar_t *def, const char *iniFile)
{
	GetI18nStrW("Tera Term", key, buf, buf_len, def, iniFile);
}

void get_lang_msg(const char *key, PCHAR buf, int buf_len, const char *def, const char *iniFile)
{
	GetI18nStr("Tera Term", key, buf, buf_len, def, iniFile);
}

BOOL doSelectFolder(HWND hWnd, char *path, int pathlen, const char *def, const char *msg)
{
	wchar_t *defW = ToWcharA(def);
	wchar_t *msgW = ToWcharA(msg);
	wchar_t *pathW;
	BOOL r = doSelectFolderW(hWnd, defW, msgW, &pathW);
	if (r == TRUE) {
		WideCharToACP_t(pathW, path, pathlen);
		free(pathW);
	}
	free(msgW);
	free(defW);
	return r;
}

void OutputDebugPrintf(const char *fmt, ...)
{
	char tmp[1024];
	va_list arg;
	va_start(arg, fmt);
	_vsnprintf_s(tmp, sizeof(tmp), _TRUNCATE, fmt, arg);
	va_end(arg);
	OutputDebugStringA(tmp);
}

// 各バージョンチェックは直値にできるかもしれない
//  例
//		VS2013でビルドしたプログラムは、そもそも NT4.0 では動作しないため、
//		IsWindowsNT4() は常に FALSE を返す

// OSが WindowsNT カーネルかどうかを判別する。
//
// return TRUE:  NT kernel
//        FALSE: Not NT kernel
BOOL IsWindowsNTKernel()
{
	OSVERSIONINFOEXA osvi;
	DWORDLONG dwlConditionMask = 0;
	int op = VER_EQUAL;
	BOOL ret;

	ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
	osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
	osvi.dwPlatformId = VER_PLATFORM_WIN32_NT;
	dwlConditionMask = _VerSetConditionMask(dwlConditionMask, VER_PLATFORMID, op);
	ret = _VerifyVersionInfoA(&osvi, VER_PLATFORMID, dwlConditionMask);
	return (ret);
}

// OSが Windows95 かどうかを判別する。
BOOL IsWindows95()
{
	return IsWindowsVer(VER_PLATFORM_WIN32_WINDOWS, 4, 0);
}

// OSが WindowsMe かどうかを判別する。
BOOL IsWindowsMe()
{
	return IsWindowsVer(VER_PLATFORM_WIN32_WINDOWS, 4, 90);
}

// OSが WindowsNT4.0 かどうかを判別する。
BOOL IsWindowsNT4()
{
	return IsWindowsVer(VER_PLATFORM_WIN32_NT, 4, 0);
}

// OSが Windows2000 かどうかを判別する。
BOOL IsWindows2000()
{
	return IsWindowsVer(VER_PLATFORM_WIN32_NT, 5, 0);
}

// OSが Windows2000 以降 かどうかを判別する。
//
// return TRUE:  2000 or later
//        FALSE: NT4 or earlier
BOOL IsWindows2000OrLater(void)
{
	return IsWindowsVerOrLater(5, 0);
}

// OSが WindowsVista 以降 かどうかを判別する。
//
// return TRUE:  Vista or later
//        FALSE: XP or earlier
BOOL IsWindowsVistaOrLater(void)
{
	return IsWindowsVerOrLater(6, 0);
}

// OSが Windows7 以降 かどうかを判別する。
//
// return TRUE:  7 or later
//        FALSE: Vista or earlier
BOOL IsWindows7OrLater(void)
{
	return IsWindowsVerOrLater(6, 1);
}

// OS がマルチモニタ API をサポートしているかどうかを判別する。
//   98 以降/2000 以降は TRUE を返す
BOOL HasMultiMonitorSupport()
{
	HMODULE mod;

	if (((mod = GetModuleHandle("user32.dll")) != NULL) &&
	    (GetProcAddress(mod, "MonitorFromPoint") != NULL)) {
		return TRUE;
	}
	return FALSE;
}

// OS が DnsQuery をサポートしているかどうかを判別する。
//   2000 以降は TRUE を返す
BOOL HasDnsQuery()
{
	HMODULE mod;

	if (((mod = GetModuleHandle("Dnsapi.dll")) != NULL) &&
		(GetProcAddress(mod, "DnsQuery") != NULL)) {
		return TRUE;
	}
	return FALSE;
}

// 通知アイコンでのバルーンチップに対応しているか判別する。
// Me/2000 以降で TRUE を返す
BOOL HasBalloonTipSupport()
{
	return IsWindows2000OrLater() || IsWindowsMe();
}

// OPENFILENAMEA.lStructSize に代入する値
DWORD get_OPENFILENAME_SIZE()
{
	if (IsWindows2000OrLater()) {
		return sizeof(OPENFILENAMEA);
	}
	return OPENFILENAME_SIZE_VERSION_400A;
}

// OPENFILENAMEW.lStructSize に代入する値
DWORD get_OPENFILENAME_SIZEW()
{
	if (IsWindows2000OrLater()) {
		return sizeof(OPENFILENAMEW);
	}
//	return OPENFILENAME_SIZE_VERSION_400W;
	return CDSIZEOF_STRUCT(OPENFILENAMEW,lpTemplateName);
}

/*
 *	現在の時間を文字列にして返す
 *
 *	@return	経過時刻文字列
 *			不要になったらfree()すること
 */
char *mctimelocal(const char *format, BOOL utc_flag)
{
	SYSTEMTIME systime;
	const size_t sizeof_strtime = 29;
	char *strtime = malloc(sizeof_strtime);
	static const char week[][4] = {
		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
	};
	static const char month[][4] = {
		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
	};
	char tmp[5];
	unsigned int i = strlen(format);

	*strtime = '\0';
	if (utc_flag) {
		GetSystemTime(&systime);
	}
	else {
		GetLocalTime(&systime);
	}
	for (i=0; i<strlen(format); i++) {
		if (format[i] == '%') {
			char c = format[i + 1];
			switch (c) {
				case 'a':
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%s", week[systime.wDayOfWeek]);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					i++;
					break;
				case 'b':
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%s", month[systime.wMonth - 1]);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					i++;
					break;
				case 'd':
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%02d", systime.wDay);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					i++;
					break;
				case 'e':
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%2d", systime.wDay);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					i++;
					break;
				case 'H':
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%02d", systime.wHour);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					i++;
					break;
				case 'N':
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%03d", systime.wMilliseconds);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					i++;
					break;
				case 'm':
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%02d", systime.wMonth);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					i++;
					break;
				case 'M':
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%02d", systime.wMinute);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					i++;
					break;
				case 'S':
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%02d", systime.wSecond);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					i++;
					break;
				case 'w':
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%d", systime.wDayOfWeek);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					i++;
					break;
				case 'Y':
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%04d", systime.wYear);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					i++;
					break;
				case '%':
					strncat_s(strtime, sizeof_strtime, "%", _TRUNCATE);
					i++;
					break;
				default:
					_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%c", format[i]);
					strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
					break;
			}
		}
		else {
			_snprintf_s(tmp, sizeof(tmp), _TRUNCATE, "%c", format[i]);
			strncat_s(strtime, sizeof_strtime, tmp, _TRUNCATE);
		}
	}

	return strtime;
}

/*
 *	現在までの経過時間を文字列にして返す
 *
 *	@return	経過時間の文字列
 *			不要になったらfree()すること
 */
char *strelapsed(DWORD start_time)
{
	size_t sizeof_strtime = 20;
	char *strtime = malloc(sizeof_strtime);
	int days, hours, minutes, seconds, msecs;
	DWORD delta = GetTickCount() - start_time;

	msecs = delta % 1000;
	delta /= 1000;

	seconds = delta % 60;
	delta /= 60;

	minutes = delta % 60;
	delta /= 60;

	hours = delta % 24;
	days = delta / 24;

	_snprintf_s(strtime, sizeof_strtime, _TRUNCATE,
		"%d %02d:%02d:%02d.%03d",
		days, hours, minutes, seconds, msecs);

	return strtime;
}

wchar_t * PASCAL GetParam(wchar_t *buff, size_t size, wchar_t *param)
{
	size_t i = 0;
	BOOL quoted = FALSE;

	while (*param == ' ' || *param == '\t') {
		param++;
	}

	if (*param == '\0' || *param == ';') {
		return NULL;
	}

	while (*param != '\0' && (quoted || (*param != ';' && *param != ' ' && *param != '\t'))) {
		if (*param == '"') {
			if (*(param+1) != '"') {
				quoted = !quoted;
			}
			else {
				if (i < size - 1) {
					buff[i++] = *param;
				}
				param++;
			}
		}
		if (i < size - 1) {
			buff[i++] = *param;
		}
		param++;
	}
	if (!quoted && (buff[i-1] == ';')) {
		i--;
	}

	buff[i] = '\0';
	return (param);
}

void PASCAL DequoteParam(wchar_t *dest, size_t dest_len, wchar_t *src)
{
	BOOL quoted = FALSE;
	wchar_t *dest_end = dest + dest_len - 1;

	if (src == dest) {
		while (*src != '\0' && *src != '"' && dest < dest_end) {
			src++; dest++;
		}
	}

	while (*src != '\0' && dest < dest_end) {
		if (*src != '"' || (*++src == '"' && quoted)) {
			*dest++ = *src++;
		}
		else {
			quoted = !quoted;
		}
	}

	*dest = '\0';
}

void PASCAL DeleteComment(PCHAR dest, int dest_size, PCHAR src)
{
	BOOL quoted = FALSE;
	PCHAR dest_end = dest + dest_size - 1;

	while (*src != '\0' && dest < dest_end && (quoted || *src != ';')) {
		*dest++ = *src;

		if (*src++ == '"') {
			if (*src == '"' && dest < dest_end) {
				*dest++ = *src++;
			}
			else {
				quoted = !quoted;
			}
		}
	}

	*dest = '\0';

	return;
}

void split_buffer(char *buffer, int delimiter, char **head, char **body)
{
	char *p1, *p2;

	*head = *body = NULL;

	if (!isalnum(*buffer) || (p1 = strchr(buffer, delimiter)) == NULL) {
		return;
	}

	*head = buffer;

	p2 = buffer;
	while (p2 < p1 && !isspace(*p2)) {
		p2++;
	}

	*p2 = '\0';

	p1++;
	while (*p1 && isspace(*p1)) {
		p1++;
	}

	*body = p1;
}

/**
 *	ダイアログフォントを取得する
 *	エラーは発生しない
 */
DllExport void GetMessageboxFont(LOGFONT *logfont)
{
	NONCLIENTMETRICSA nci;
	const int st_size = CCSIZEOF_STRUCT(NONCLIENTMETRICSA, lfMessageFont);
	BOOL r;

	memset(&nci, 0, sizeof(nci));
	nci.cbSize = st_size;
	r = SystemParametersInfoA(SPI_GETNONCLIENTMETRICS, st_size, &nci, 0);
	assert(r == TRUE);
	*logfont = nci.lfStatusFont;
}
