teraterm/teraterm/filesys_log.cpp

/*
 * (C) 2020- 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.
 */

/* TERATERM.EXE, log routines */
#include <stdio.h>
#if !defined(_CRTDBG_MAP_ALLOC)
#define _CRTDBG_MAP_ALLOC
#endif
#include <stdlib.h>
#include <crtdbg.h>
#include <process.h>
#include <windows.h>
#include <htmlhelp.h>
#include <assert.h>

#include "teraterm.h"
#include "tttypes.h"
#include "ftdlg.h"
#include "ttwinman.h"
#include "commlib.h"
#include "ttcommon.h"
#include "ttlib.h"
#include "dlglib.h"
#include "vtterm.h"
#include "ftlib.h"
#include "buffer.h"
#include "helpid.h"
#include "codeconv.h"
#include "asprintf.h"
#include "win32helper.h"

#include "filesys_log_res.h"
#include "filesys_log.h"
#include "filesys.h"  // for ProtoGetProtoFlag()

#define TitLog      L"Log"

/*
   Line Head flag for timestamping
   2007.05.24 Gentaro
*/
enum enumLineEnd {
        Line_Other = 0,
        Line_LineHead = 1,
        Line_FileHead = 2,
};

typedef struct {
        wchar_t *FullName;

        HANDLE FileHandle;
        LONG FileSize, ByteCount;

        DWORD StartTime;

        enum enumLineEnd eLineEnd;

        // log rotate
        int RotateMode;  //  enum rotate_mode RotateMode;
        LONG RotateSize;
        int RotateStep;

        HANDLE LogThread;
        DWORD LogThreadId;
        HANDLE LogThreadEvent;

        BOOL IsPause;

        PFileTransDlg FLogDlg;

        LogCode_t log_code;
        BOOL bom;

        BOOL FileLog;
        BOOL BinLog;
} TFileVar;
typedef TFileVar *PFileVar;

static PFileVar LogVar = NULL;

static PCHAR cv_LogBuf;
static int cv_LogPtr, cv_LStart, cv_LCount;
static PCHAR cv_BinBuf;
static int cv_BinPtr, cv_BStart, cv_BCount;
static int cv_BinSkip;

// �x�����������p�X���b�h�����b�Z�[�W
#define WM_DPC_LOGTHREAD_SEND (WM_APP + 1)

static void Log1Bin(BYTE b);
static void LogBinSkip(int add);
static BOOL CreateLogBuf(void);
static BOOL CreateBinBuf(void);
void LogPut1(BYTE b);
static void OutputStr(const wchar_t *str);
static void LogToFile(PFileVar fv);
static void FLogOutputBOM(PFileVar fv);

static BOOL OpenFTDlg_(PFileVar fv)
{
        PFileTransDlg FTDlg = new CFileTransDlg();
        if (FTDlg == NULL) {
                return FALSE;
        }

        wchar_t *DlgCaption;
        wchar_t uimsg[MAX_UIMSG];
        get_lang_msgW("FILEDLG_TRANS_TITLE_LOG", uimsg, _countof(uimsg), TitLog, ts.UILanguageFile);
        aswprintf(&DlgCaption, L"Tera Term: %s", uimsg);

        CFileTransDlg::Info info;
        info.UILanguageFile = ts.UILanguageFile;
        info.OpId = CFileTransDlg::OpLog;
        info.DlgCaption = DlgCaption;
        info.FileName = NULL;
        info.FullName = fv->FullName;
        info.HideDialog = ts.LogHideDialog ? TRUE : FALSE;
        info.HMainWin = HVTWin;
        FTDlg->Create(hInst, &info);
        FTDlg->RefreshNum(0, fv->FileSize, fv->ByteCount);

        fv->FLogDlg = FTDlg;

        free(DlgCaption);
        return TRUE;
}

/**
 *      �t�@�C�������������u������
 *              &h      �z�X�g�����u�� (2007.5.14)
 *              &p      TCP�|�[�g�������u�� (2009.6.12)
 *              &u      ���O�I���������[�U��
 */
static void ConvertLogname(char *c, int destlen)
{
        char buf[MAXPATHLEN], buf2[MAXPATHLEN], *p = c;
        char tmphost[1024];
        char tmpuser[256+1];
        DWORD len_user = sizeof(tmpuser);

        memset(buf, 0, sizeof(buf));

        while(*p != '\0') {
                if (*p == '&' && *(p+1) != '\0') {
                        switch (*(p+1)) {
                          case 'h':
                                if (cv.Open) {
                                        if (cv.PortType == IdTCPIP) {
                                                // �z�X�g����IPv6�A�h���X�����A�t�@�C�������g�p�����������������������A
                                                // �]�v�����������������B
                                                // (2013.3.9 yutaka)
                                                strncpy_s(tmphost, sizeof(tmphost), ts.HostName, _TRUNCATE);
                                                //strncpy_s(tmphost, sizeof(tmphost), "2001:0db8:bd05:01d2:288a:1fc0:0001:10ee", _TRUNCATE);
                                                replaceInvalidFileNameChar(tmphost, '_');
                                                strncat_s(buf,sizeof(buf), tmphost, _TRUNCATE);
                                        }
                                        else if (cv.PortType == IdSerial) {
                                                strncpy_s(buf2,sizeof(buf2),buf,_TRUNCATE);
                                                _snprintf_s(buf, sizeof(buf), _TRUNCATE, "%sCOM%d", buf2, ts.ComPort);
                                        }
                                }
                                break;
                          case 'p':
                                if (cv.Open) {
                                        if (cv.PortType == IdTCPIP) {
                                                char port[6];
                                                _snprintf_s(port, sizeof(port), _TRUNCATE, "%d", ts.TCPPort);
                                                strncat_s(buf,sizeof(buf),port,_TRUNCATE);
                                        }
                                }
                                break;
                          case 'u':
                                if (GetUserName(tmpuser, &len_user) != 0) {
                                        strncat_s(buf,sizeof(buf),tmpuser,_TRUNCATE);
                                }
                                break;
                          default:
                                strncpy_s(buf2,sizeof(buf2),p,2);
                                strncat_s(buf,sizeof(buf),buf2,_TRUNCATE);
                        }
                        p++;
                }
                else {
                        strncpy_s(buf2,sizeof(buf2),p,1);
                        strncat_s(buf,sizeof(buf),buf2,_TRUNCATE);
                }
                p++;
        }
        strncpy_s(c, destlen, buf, _TRUNCATE);
}

static void FixLogOption(void)
{
        if (ts.LogBinary) {
                ts.LogTypePlainText = false;
                ts.LogTimestamp = false;
        }
}


// �X���b�h���I�����t�@�C�����N���[�Y
static void CloseFileSync(PFileVar fv)
{
        BOOL ret;

        if (fv->FileHandle == INVALID_HANDLE_VALUE) {
                return;
        }

        if (fv->LogThread != INVALID_HANDLE_VALUE) {
                // �X���b�h���I������
                ret = PostThreadMessage(fv->LogThreadId, WM_QUIT, 0, 0);
                if (ret != 0) {
                        // �X���b�h�L���[���G���L���[���������������������������s���B
                        WaitForSingleObject(fv->LogThread, INFINITE);
                }
                else {
                        //DWORD code = GetLastError();
                }
                CloseHandle(fv->LogThread);
                fv->LogThread = INVALID_HANDLE_VALUE;
        }
        CloseHandle(fv->FileHandle);
        fv->FileHandle = INVALID_HANDLE_VALUE;
}

// �x�����������p�X���b�h
static unsigned _stdcall DeferredLogWriteThread(void *arg)
{
        MSG msg;
        PFileVar fv = (PFileVar)arg;
        PCHAR buf;
        DWORD buflen;
        DWORD wrote;

        PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE);

        // �X���b�h�L���[���������I�������������X���b�h�����������m�����B
        if (fv->LogThreadEvent != NULL) {
                SetEvent(fv->LogThreadEvent);
        }

        while (GetMessage(&msg, NULL, 0, 0) > 0) {
                switch (msg.message) {
                        case WM_DPC_LOGTHREAD_SEND:
                                buf = (PCHAR)msg.wParam;
                                buflen = (DWORD)msg.lParam;
                                WriteFile(fv->FileHandle, buf, buflen, &wrote, NULL);
                                free(buf);   // ����������������
                                break;

                        case WM_QUIT:
                                goto end;
                                break;
                }
        }

end:
        _endthreadex(0);
        return (0);
}

// �x�����������p�X���b�h���N�����B
// (2013.4.19 yutaka)
// DeferredLogWriteThread �X���b�h���N�������A�X���b�h�L���[�����������������O���A
// ���O�t�@�C�����N���[�Y(CloseFileSync)���s���������A�G���L���[�����s���A�f�b�h���b�N
// �����������������C�������B
// �X���b�h�����������s�������A���O�����C�x���g�I�u�W�F�N�g���g�����A�X���b�h�L���[��
// ���������������������������������B���O�t���C�x���g�I�u�W�F�N�g���g���������A
// �V�X�e��(Windows OS)�������j�[�N�����O�������K�v�������B
// (2016.9.23 yutaka)
static void StartThread(PFileVar fv)
{
        unsigned tid;
        fv->LogThreadEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
        fv->LogThread = (HANDLE)_beginthreadex(NULL, 0, DeferredLogWriteThread, fv, 0, &tid);
        fv->LogThreadId = tid;
        if (fv->LogThreadEvent != NULL) {
                WaitForSingleObject(fv->LogThreadEvent, INFINITE);
                CloseHandle(fv->LogThreadEvent);
        }
}

/**
 *      �_�C�A���O�����e�� ts ����������
 *
 *      TODO
 *              �_�C�A���O�����������l�������I��������
 *              ����������������������������������������������?
 */
static void SetLogFlags(HWND Dialog)
{
        WORD BinFlag, val;

        GetRB(Dialog, &BinFlag, IDC_FOPTBIN, IDC_FOPTBIN);
        ts.LogBinary = BinFlag;

        GetRB(Dialog, &val, IDC_APPEND, IDC_APPEND);
        ts.Append = val;

        if (!BinFlag) {
                GetRB(Dialog, &val, IDC_PLAINTEXT, IDC_PLAINTEXT);
                ts.LogTypePlainText = val;

                GetRB(Dialog, &val, IDC_TIMESTAMP, IDC_TIMESTAMP);
                ts.LogTimestamp = val;
        }

        GetRB(Dialog, &val, IDC_HIDEDIALOG, IDC_HIDEDIALOG);
        ts.LogHideDialog = val;

        GetRB(Dialog, &val, IDC_ALLBUFF_INFIRST, IDC_ALLBUFF_INFIRST);
        ts.LogAllBuffIncludedInFirst = val;

        ts.LogTimestampType = (WORD)(GetCurSel(Dialog, IDC_TIMESTAMPTYPE) - 1);
}

/**
 *      ���O�t�@�C���`�F�b�N
 *
 *      @param[in]      filename
 *      @param[out]     exist   TURE/FALSE
 *      @param[out]     bom             0       no BOM (or file not exist)
 *                                              1       UTF-8
 *                                              2       UTF-16LE
 *                                              3       UTF-16BE
 */
static void CheckLogFile(const wchar_t *filename, BOOL *exist, int *bom)
{
        *exist = FALSE;
        *bom = 0;

        // �t�@�C������������?
        DWORD logdir = GetFileAttributesW(filename);
        if ((logdir != INVALID_FILE_ATTRIBUTES) && ((logdir & FILE_ATTRIBUTE_DIRECTORY) == 0)) {
                // �t�@�C����������
                *exist = TRUE;

                // BOM�L��/�����`�F�b�N
                FILE *fp = _wfopen(filename, L"rb");
                if (fp != NULL) {
                        unsigned char tmp[4];
                        size_t l = fread(tmp, 1, sizeof(tmp), fp);
                        fclose(fp);
                        if (l < 2) {
                                *bom = 0;
                        } else if (l >= 2 && tmp[0] == 0xff && tmp[1] == 0xfe) {
                                // UTF-16LE
                                *bom = 2;
                        } else if (l >= 2 && tmp[0] == 0xfe && tmp[1] == 0xff) {
                                // UTF-16BE
                                *bom = 3;
                        } else if (l >= 3 && tmp[0] == 0xef && tmp[1] == 0xbb && tmp[2] == 0xbf) {
                                // UTF-8
                                *bom = 1;
                        } else {
                                *bom = 0;
                        }
                }
        }
}

typedef struct {
        FLogDlgInfo_t *info;
        // work
        BOOL file_exist;
        int current_bom; // ���������t�@�C�����G���R�[�f�B���O�i�t�@�C����BOM���������j
        TTTSet *pts;
        TComVar *pcv;
} LogDlgWork_t;


/*
 * Log �_�C�A���O�������AEnable/Disable �����������R���g���[��
 * 
 * - Append
 *   �w���������t�@�C������������������ Enable
 *   �w���������t�@�C�������������������� Disable
 * 
 * - BOM, Encoding
 *   Text ���� New/Overwrite �������� Enable
 *   ���������������� Disable
 *   BOM ���t�@�C��������������������������������������
 *   Encoding �����L�����������������A�����t�@�C�����G���R�[�f�B���O��
 *   �����I���_�C�A���O�����f���������A���[�U�������w������������
 * 
 * - Plain Text, Timestamp, Timestamp ����
 *   Text �������� Enable
 *   Binary �������� Disable
 * 
 * - Timestamp ����
 *   Timestamp=on �������� Enable
 *   Timestamp=off �������� Disable
 */

static void ArrangeControls(HWND Dialog, LogDlgWork_t *work,
                            WORD Append, WORD LogBinary,
                            WORD LogTypePlainText, WORD LogTimestamp)
{
        if (work->file_exist) {
                // Append ���W�I�{�^�����A�t�@�C�����������������L��������
                EnableWindow(GetDlgItem(Dialog, IDC_APPEND), TRUE);

                if (Append > 0) {
                        CheckRadioButton(Dialog, IDC_NEW_OVERWRITE, IDC_APPEND, IDC_APPEND);
                }
                else {
                        CheckRadioButton(Dialog, IDC_NEW_OVERWRITE, IDC_APPEND, IDC_NEW_OVERWRITE);
                }
        }
        else { // �t�@�C�������� -> �V�K
                EnableWindow(GetDlgItem(Dialog, IDC_APPEND), FALSE);
                CheckRadioButton(Dialog, IDC_NEW_OVERWRITE, IDC_APPEND, IDC_NEW_OVERWRITE);
        }

        if (!LogBinary && !Append) {
                EnableWindow(GetDlgItem(Dialog, IDC_BOM), TRUE);
                EnableWindow(GetDlgItem(Dialog, IDC_TEXTCODING_DROPDOWN), TRUE);
        }
        else {
                EnableWindow(GetDlgItem(Dialog, IDC_BOM), FALSE);
                EnableWindow(GetDlgItem(Dialog, IDC_TEXTCODING_DROPDOWN), FALSE);
        }

        if (LogBinary) {
                CheckRadioButton(Dialog, IDC_FOPTBIN, IDC_FOPTTEXT, IDC_FOPTBIN);

                DisableDlgItem(Dialog, IDC_PLAINTEXT, IDC_PLAINTEXT);
                DisableDlgItem(Dialog, IDC_TIMESTAMP, IDC_TIMESTAMP);
                DisableDlgItem(Dialog, IDC_TIMESTAMPTYPE, IDC_TIMESTAMPTYPE);
        }
        else {
                CheckRadioButton(Dialog, IDC_FOPTBIN, IDC_FOPTTEXT, IDC_FOPTTEXT);

                EnableDlgItem(Dialog, IDC_PLAINTEXT, IDC_PLAINTEXT);
                EnableDlgItem(Dialog, IDC_TIMESTAMP, IDC_TIMESTAMP);
                EnableDlgItem(Dialog, IDC_TIMESTAMPTYPE, IDC_TIMESTAMPTYPE);

                if (LogTypePlainText) {
                        SetRB(Dialog, 1, IDC_PLAINTEXT, IDC_PLAINTEXT);
                }
                if (LogTimestamp) {
                        SetRB(Dialog, 1, IDC_TIMESTAMP, IDC_TIMESTAMP);
                }
                else {
                        DisableDlgItem(Dialog, IDC_TIMESTAMPTYPE, IDC_TIMESTAMPTYPE);
                }
        }

        if (work->file_exist && Append) {
                // �����t�@�C�����G���R�[�f�B���O�����f����
                int bom = work->current_bom;
                int cur =
                        bom == 1 ? 0 :
                        bom == 2 ? 1 :
                        bom == 3 ? 2 : 0;
                SendDlgItemMessage(Dialog, IDC_TEXTCODING_DROPDOWN, CB_SETCURSEL, cur, 0);
        }
}

static void CheckLogFile(HWND Dialog, const wchar_t *filename, LogDlgWork_t *work)
{
        BOOL exist;
        int bom;
        CheckLogFile(filename, &exist, &bom);
        work->file_exist = exist;
        work->current_bom = bom;
}

static INT_PTR CALLBACK LogFnHook(HWND Dialog, UINT Message, WPARAM wParam, LPARAM lParam)
{
        static const DlgTextInfo TextInfos[] = {
                { 0, "DLG_TABSHEET_TITLE_LOG" },
                { IDC_SENDFILE_FILENAME_TITLE, "DLG_FOPT_FILENAME_TITLE" },
                { IDC_FOPTTEXT, "DLG_FOPT_TEXT" },
                { IDC_FOPTBIN, "DLG_FOPT_BINARY" },
                { IDC_BOM, "DLG_FOPT_BOM" },
                { IDC_APPEND, "DLG_FOPT_APPEND" },
                { IDC_PLAINTEXT, "DLG_FOPT_PLAIN" },
                { IDC_HIDEDIALOG, "DLG_FOPT_HIDEDIALOG" },
                { IDC_ALLBUFF_INFIRST, "DLG_FOPT_ALLBUFFINFIRST" },
                { IDC_TIMESTAMP, "DLG_FOPT_TIMESTAMP" },
                { IDC_NEW_OVERWRITE, "DLG_FOPT_NEW_OVERWRITE" },
                { IDC_SENDFILE_FILENAME_TITLE, "DLG_FOPT_APPEND_LABEL" },
                { IDC_SENDFILE_FILENAME_TITLE, "DLG_FOPT_BINARY_LABEL" },
        };
        static const I18nTextInfo timestamp_list[] = {
                { "DLG_FOPT_TIMESTAMP_LOCAL", L"Local Time" },
                { "DLG_FOPT_TIMESTAMP_UTC", L"UTC" },
                { "DLG_FOPT_TIMESTAMP_ELAPSED_LOGGING", L"Elapsed Time (Logging)" },
                { "DLG_FOPT_TIMESTAMP_ELAPSED_CONNECTION", L"Elapsed Time (Connection)" },
        };
        LogDlgWork_t *work = (LogDlgWork_t *)GetWindowLongPtr(Dialog, DWLP_USER);

        if (Message == RegisterWindowMessage(HELPMSGSTRING)) {
                // �R�����_�C�A���O�������w���v���b�Z�[�W���t��������
                Message = WM_COMMAND;
                wParam = IDHELP;
        }
        switch (Message) {
        case WM_INITDIALOG: {
                work = (LogDlgWork_t *)lParam;
                TTTSet *pts = work->pts;
                SetWindowLongPtr(Dialog, DWLP_USER, (LONG_PTR)work);
                ::DragAcceptFiles(Dialog, TRUE);

                SetDlgTextsW(Dialog, TextInfos, _countof(TextInfos), pts->UILanguageFileW);
                SetI18nListW("Tera Term", Dialog, IDC_TIMESTAMPTYPE, timestamp_list, _countof(timestamp_list),
                             pts->UILanguageFileW, 0);

                SendDlgItemMessage(Dialog, IDC_TEXTCODING_DROPDOWN, CB_ADDSTRING, 0, (LPARAM)"UTF-8");
                SendDlgItemMessage(Dialog, IDC_TEXTCODING_DROPDOWN, CB_ADDSTRING, 0, (LPARAM)"UTF-16LE");
                SendDlgItemMessage(Dialog, IDC_TEXTCODING_DROPDOWN, CB_ADDSTRING, 0, (LPARAM)"UTF-16BE");
                SendDlgItemMessage(Dialog, IDC_TEXTCODING_DROPDOWN, CB_SETCURSEL, 0, 0);

                SetDlgItemTextW(Dialog, IDC_FOPT_FILENAME_EDIT, work->info->filename);

                // timestamp ����
                int tstype = pts->LogTimestampType == TIMESTAMP_LOCAL ? 0 :
                             pts->LogTimestampType == TIMESTAMP_UTC ? 1 :
                             pts->LogTimestampType == TIMESTAMP_ELAPSED_LOGSTART ? 2 :
                             pts->LogTimestampType == TIMESTAMP_ELAPSED_CONNECTED ? 3 : 0;
                SendDlgItemMessage(Dialog, IDC_TIMESTAMPTYPE, CB_SETCURSEL, tstype, 0);


                CheckLogFile(Dialog, work->info->filename, work);
                ArrangeControls(Dialog, work, pts->Append, pts->LogBinary, pts->LogTypePlainText, pts->LogTimestamp);
                work->info->filename = NULL;

                // Hide dialog �`�F�b�N�{�b�N�X
                if (pts->LogHideDialog) {
                        SetRB(Dialog, 1, IDC_HIDEDIALOG, IDC_HIDEDIALOG);
                }

                // Include screen buffer �`�F�b�N�{�b�N�X
                if (pts->LogAllBuffIncludedInFirst) {
                        SetRB(Dialog, 1, IDC_ALLBUFF_INFIRST, IDC_ALLBUFF_INFIRST);
                }

                CenterWindow(Dialog, GetParent(Dialog));

                return TRUE;
        }

        case WM_COMMAND:
                switch (LOWORD(wParam)) {
                case IDOK: {
                        wchar_t *filename;
                        hGetDlgItemTextW(Dialog, IDC_FOPT_FILENAME_EDIT, &filename);
                        work->info->filename = filename;
                        work->info->append = IsDlgButtonChecked(Dialog, IDC_APPEND) == BST_CHECKED;
                        work->info->bom = IsDlgButtonChecked(Dialog, IDC_BOM) == BST_CHECKED;
                        work->info->code = (LogCode_t)SendDlgItemMessageA(Dialog, IDC_TEXTCODING_DROPDOWN, CB_GETCURSEL, 0, 0);
                        SetLogFlags(Dialog);
                        EndDialog(Dialog, IDOK);
                        break;
                }
                case IDCANCEL:
                        EndDialog(Dialog, IDCANCEL);
                        break;
                case IDHELP:
                        OpenHelpCV(work->pcv, HH_HELP_CONTEXT, HlpFileLog);
                        break;
                case IDC_FOPT_FILENAME_BUTTON: {
                        /* save current dir */
                        const wchar_t *UILanguageFile = work->pts->UILanguageFileW;
                        wchar_t *curdir;
                        hGetCurrentDirectoryW(&curdir);

                        wchar_t fname[MAX_PATH];
                        GetDlgItemTextW(Dialog, IDC_FOPT_FILENAME_EDIT, fname, _countof(fname));

                        const wchar_t* simple_log_filter = L"*.txt;*.log";
                        wchar_t *FNFilter = GetCommonDialogFilterWW(simple_log_filter, UILanguageFile);

                        wchar_t *caption;
                        wchar_t *uimsg;
                        GetI18nStrWW("Tera Term", "FILEDLG_TRANS_TITLE_LOG",
                                                 TitLog, UILanguageFile, &uimsg);
                        aswprintf(&caption, L"Tera Term: %s", uimsg);
                        free(uimsg);

                        OPENFILENAMEW ofn = {};
                        ofn.lStructSize = get_OPENFILENAME_SIZEW();
                        //ofn.Flags = OFN_PATHMUSTEXIST | OFN_OVERWRITEPROMPT;
                        ofn.Flags |= OFN_EXPLORER | OFN_ENABLESIZING;
                        ofn.Flags |= OFN_SHOWHELP;
                        ofn.Flags |= OFN_NOCHANGEDIR;           // ��������������������������������
                        ofn.hwndOwner = Dialog;
                        ofn.lpstrFilter = FNFilter;
                        ofn.nFilterIndex = 1;
                        ofn.lpstrFile = fname;
                        ofn.nMaxFile = _countof(fname);
                        ofn.lpstrTitle = caption;
                        ofn.lpstrInitialDir = work->pts->LogDefaultPathW;
                        BOOL Ok = GetSaveFileNameW(&ofn);
                        free(caption);
                        free(FNFilter);
                        if (Ok) {
                                SetDlgItemTextW(Dialog, IDC_FOPT_FILENAME_EDIT, fname);
                        }

                        /* restore dir */
                        SetCurrentDirectoryW(curdir);
                        free(curdir);

                        break;
                }
                case IDC_NEW_OVERWRITE:
                case IDC_APPEND:
                case IDC_FOPTTEXT:
                case IDC_FOPTBIN:
                case IDC_TIMESTAMP:
                        {
                                WORD Appnd, LogBinary, LogTypePlainText, LogTimestamp;
                                GetRB(Dialog, &Appnd, IDC_APPEND, IDC_APPEND);
                                GetRB(Dialog, &LogBinary, IDC_FOPTBIN, IDC_FOPTBIN);
                                GetRB(Dialog, &LogTypePlainText, IDC_PLAINTEXT, IDC_PLAINTEXT);
                                GetRB(Dialog, &LogTimestamp, IDC_TIMESTAMP, IDC_TIMESTAMP);
                                ArrangeControls(Dialog, work, Appnd, LogBinary, LogTypePlainText, LogTimestamp);
                        }
                        break;
                case IDC_FOPT_FILENAME_EDIT:
                        if (HIWORD(wParam) == EN_CHANGE){
                                wchar_t *filename;
                                hGetDlgItemTextW(Dialog, IDC_FOPT_FILENAME_EDIT, &filename);
                                CheckLogFile(Dialog, filename, work);
                                free(filename);
                                {
                                        WORD Appnd, LogBinary, LogTypePlainText, LogTimestamp;
                                        GetRB(Dialog, &Appnd, IDC_APPEND, IDC_APPEND);
                                        GetRB(Dialog, &LogBinary, IDC_FOPTBIN, IDC_FOPTBIN);
                                        GetRB(Dialog, &LogTypePlainText, IDC_PLAINTEXT, IDC_PLAINTEXT);
                                        GetRB(Dialog, &LogTimestamp, IDC_TIMESTAMP, IDC_TIMESTAMP);
                                        ArrangeControls(Dialog, work, Appnd, LogBinary, LogTypePlainText, LogTimestamp);
                                }
                        }
                        break;
                }
                break;
        case WM_DROPFILES: {
                // �����h���b�v��������������1������������
                HDROP hDrop = (HDROP)wParam;
                const UINT len = DragQueryFileW(hDrop, 0, NULL, 0);
                if (len == 0) {
                        DragFinish(hDrop);
                        return TRUE;
                }
                wchar_t *filename = (wchar_t *)malloc(sizeof(wchar_t) * (len + 1));
                DragQueryFileW(hDrop, 0, filename, len + 1);
                filename[len] = '\0';
                CheckRadioButton(Dialog, IDC_NEW_OVERWRITE, IDC_APPEND, IDC_APPEND);
                SetDlgItemTextW(Dialog, IDC_FOPT_FILENAME_EDIT, filename);
                SendDlgItemMessage(Dialog, IDC_FOPT_FILENAME_EDIT, EM_SETSEL, len, len);
                free(filename);
                DragFinish(hDrop);
                return TRUE;
        }
        }
        return FALSE;
}

static void OpenLogFile(PFileVar fv)
{
        // LogLockExclusive ���L���������������������L���������A
        // ���������������O�t�@�C���������G�f�B�^���J����������
        int dwShareMode = FILE_SHARE_READ;
        if (!ts.LogLockExclusive) {
                dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
        }
        fv->FileHandle = CreateFileW(fv->FullName, GENERIC_WRITE, dwShareMode, NULL,
                                                                 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
}

static BOOL LogStart(PFileVar fv, const wchar_t *fname)
{
        fv->FullName = _wcsdup(fname);
        FixLogOption();

        if (ts.LogBinary > 0)
        {
                fv->BinLog = TRUE;
                fv->FileLog = FALSE;
                if (! CreateBinBuf())
                {
                        return FALSE;
                }
        }
        else {
                fv->BinLog = FALSE;
                fv->FileLog = TRUE;
                if (! CreateLogBuf())
                {
                        return FALSE;
                }
        }
        cv_LStart = cv_LogPtr;
        cv_LCount = 0;

        OpenLogFile(fv);
        if (fv->FileHandle == INVALID_HANDLE_VALUE) {
                return FALSE;
        }

        /* 2007.05.24 Gentaro */
        fv->eLineEnd = Line_LineHead;
        if (ts.Append > 0)
        {
                SetFilePointer(fv->FileHandle, 0, NULL, FILE_END);
                /* 2007.05.24 Gentaro
                   If log file already exists,
                   a newline is inserted before the first timestamp.
                */
                fv->eLineEnd = Line_FileHead;
        }

        // BOM�o��
        if (ts.Append == 0 && ts.LogBinary == 0 && fv->bom) {
                // ���L��������(�V�K) && �o�C�i���������� && BOM ���o����
                FLogOutputBOM(fv);
        }

        // Log rotate configuration
        fv->RotateMode = ts.LogRotate;
        fv->RotateSize = ts.LogRotateSize;
        fv->RotateStep = ts.LogRotateStep;

        // Log rotate���L���������A�����t�@�C���T�C�Y�����������B
        // �������t�@�C�������������T�C�Y�����[�e�[�g�������������C���B
        // (2016.4.9 yutaka)
        if (fv->RotateMode != ROTATE_NONE) {
                DWORD size = GetFileSize(fv->FileHandle, NULL);
                if (size == -1) {
                        return FALSE;
                }
                fv->ByteCount = size;
        }
        else {
                fv->ByteCount = 0;
        }

        if (! OpenFTDlg_(fv)) {
                return FALSE;
        }

        fv->IsPause = FALSE;
        fv->StartTime = GetTickCount();

        if (ts.DeferredLogWriteMode) {
                StartThread(fv);
        }

        if (fv->FileLog) {
                cv.Log1Byte = LogPut1;
        }
        if (fv->BinLog) {
                cv.Log1Bin = Log1Bin;
                cv.LogBinSkip = LogBinSkip;
        }

        return TRUE;
}

/**
 * �����o�b�t�@�������f�[�^�����������O�������o��
 * (2013.9.29 yutaka)
 *
 *      TODO
 *              1�s������
 */
void FLogOutputAllBuffer(void)
{
        PFileVar fv = LogVar;
        DWORD ofs;
        int size;
        wchar_t buf[512];
        for (ofs = 0 ;  ; ofs++ ) {
                // 1�����s�����������B���������������A�G�X�P�[�v�V�[�P���X�������������B
                size = BuffGetAnyLineDataW(ofs, buf, _countof(buf));
                if (size == -1)
                        break;

                OutputStr(buf);
                OutputStr(L"\r\n");
                LogToFile(fv);
        }
}

/**
 * ���O��1byte��������
 *              �o�b�t�@��������������
 *              ���������������� LogToFile() ���s������
 */
void LogPut1(BYTE b)
{
        PFileVar fv = LogVar;

        cv_LogBuf[cv_LogPtr] = b;
        cv_LogPtr++;
        if (cv_LogPtr>=InBuffSize)
                cv_LogPtr = cv_LogPtr-InBuffSize;

        if (fv->FileLog)
        {
                if (cv_LCount>=InBuffSize)
                {
                        cv_LCount = InBuffSize;
                        cv_LStart = cv_LogPtr;
                }
                else
                        cv_LCount++;
        }
        else
                cv_LCount = 0;
}

static BOOL Get1(PCHAR Buf, int *Start, int *Count, PBYTE b)
{
        if (*Count<=0) return FALSE;
        *b = Buf[*Start];
        (*Start)++;
        if (*Start>=InBuffSize)
                *Start = *Start-InBuffSize;
        (*Count)--;
        return TRUE;
}


static CRITICAL_SECTION g_filelog_lock;   /* ���b�N�p���� */

void logfile_lock_initialize(void)
{
        InitializeCriticalSection(&g_filelog_lock);
}

static inline void logfile_lock(void)
{
        EnterCriticalSection(&g_filelog_lock);
}

static inline void logfile_unlock(void)
{
        LeaveCriticalSection(&g_filelog_lock);
}

// ���O�����[�e�[�g�����B
// (2013.3.21 yutaka)
static void LogRotate(PFileVar fv)
{
        int loopmax = 10000;  // XXX
        int i, k;

        if (fv->RotateMode == ROTATE_NONE)
                return;

        if (fv->RotateMode == ROTATE_SIZE) {
                if (fv->ByteCount <= fv->RotateSize)
                        return;
                //OutputDebugPrintf("%s: mode %d size %ld\n", __FUNCTION__, fv->RotateMode, fv->ByteCount);
        } else {
                return;
        }

        logfile_lock();
        // ���O�T�C�Y���������������B
        fv->ByteCount = 0;

        // �������������t�@�C�����N���[�Y�����A�������t�@�C�����I�[�v�������B
        CloseFileSync(fv);

        // �������[�e�[�V�������X�e�b�v�����w����������
        if (fv->RotateStep > 0)
                loopmax = fv->RotateStep;

        for (i = 1 ; i <= loopmax ; i++) {
                wchar_t *filename;
                aswprintf(&filename, L"%s.%d", fv->FullName, i);
                DWORD attr = GetFileAttributesW(filename);
                free(filename);
                if (attr == INVALID_FILE_ATTRIBUTES)
                        break;
        }
        if (i > loopmax) {
                // �������������������������A�������t�@�C�������p�������B
                i = loopmax;
        }

        // ���t�@�C�������l�[���B
        for (k = i-1 ; k >= 0 ; k--) {
                wchar_t *oldfile;
                if (k == 0)
                        oldfile = _wcsdup(fv->FullName);
                else
                        aswprintf(&oldfile, L"%s.%d", fv->FullName, k);
                wchar_t *newfile;
                aswprintf(&newfile, L"%s.%d", fv->FullName, k+1);
                DeleteFileW(newfile);
                if (MoveFileW(oldfile, newfile) == 0) {
                        OutputDebugPrintf("%s: rename %d\n", __FUNCTION__, errno);
                }
                free(oldfile);
                free(newfile);
        }

        // ���I�[�v��
        OpenLogFile(fv);
        if (fv->bom) {
                FLogOutputBOM(fv);
        }
        if (ts.DeferredLogWriteMode) {
                StartThread(fv);
        }

        logfile_unlock();
}

static wchar_t *TimeStampStr(PFileVar fv)
{
        char *strtime = NULL;
        switch (ts.LogTimestampType) {
        case TIMESTAMP_LOCAL:
        default:
                strtime = mctimelocal(ts.LogTimestampFormat, FALSE);
                break;
        case TIMESTAMP_UTC:
                strtime = mctimelocal(ts.LogTimestampFormat, TRUE);
                break;
        case TIMESTAMP_ELAPSED_LOGSTART:
                strtime = strelapsed(fv->StartTime);
                break;
        case TIMESTAMP_ELAPSED_CONNECTED:
                strtime = strelapsed(cv.ConnectedTime);
                break;
        }

        char tmp[128];
        tmp[0] = 0;
        strncat_s(tmp, sizeof(tmp), "[", _TRUNCATE);
        strncat_s(tmp, sizeof(tmp), strtime, _TRUNCATE);
        strncat_s(tmp, sizeof(tmp), "] ", _TRUNCATE);

        return ToWcharA(tmp);
}

/**
 * �o�b�t�@�������O���t�@�C������������
 */
static void LogToFile(PFileVar fv)
{
        PCHAR Buf;
        int Start, Count;
        BYTE b;

        if (fv->FileLog)
        {
                Buf = cv_LogBuf;
                Start = cv_LStart;
                Count = cv_LCount;
        }
        else if (fv->BinLog)
        {
                Buf = cv_BinBuf;
                Start = cv_BStart;
                Count = cv_BCount;
        }
        else
                return;

        if (Buf==NULL) return;
        if (Count==0) return;

        // ���b�N������(2004.8.6 yutaka)
        logfile_lock();

        // ���������f�[�^����������
        DWORD WriteBufMax = 8192;
        DWORD WriteBufLen = 0;
        PCHAR WriteBuf = (PCHAR)malloc(WriteBufMax);
        while (Get1(Buf,&Start,&Count,&b)) {
                if (FLogIsPause() || ProtoGetProtoFlag()) {
                        continue;
                }

                if (WriteBufLen >= (WriteBufMax*4/5)) {
                        WriteBufMax *= 2;
                        WriteBuf = (PCHAR)realloc(WriteBuf, WriteBufMax);
                }

                WriteBuf[WriteBufLen++] = b;

                (fv->ByteCount)++;
        }

        // ��������
        if (WriteBufLen > 0) {
                if (ts.DeferredLogWriteMode) {
                        PostThreadMessage(fv->LogThreadId, WM_DPC_LOGTHREAD_SEND, (WPARAM)WriteBuf, WriteBufLen);
                }
                else {
                        DWORD wrote;
                        WriteFile(fv->FileHandle, WriteBuf, WriteBufLen, &wrote, NULL);
                        free(WriteBuf);
                }
        }

        logfile_unlock();

        if (fv->FileLog)
        {
                cv_LStart = Start;
                cv_LCount = Count;
        }
        else {
                cv_BStart = Start;
                cv_BCount = Count;
        }
        if (FLogIsPause() || ProtoGetProtoFlag()) return;
        fv->FLogDlg->RefreshNum(fv->StartTime, fv->FileSize, fv->ByteCount);


        // ���O�E���[�e�[�g
        LogRotate(fv);
}

static BOOL CreateLogBuf(void)
{
        if (cv_LogBuf==NULL)
        {
                cv_LogBuf = (char *)malloc(InBuffSize);
                cv_LogPtr = 0;
                cv_LStart = 0;
                cv_LCount = 0;
        }
        return (cv_LogBuf!=NULL);
}

static void FreeLogBuf(void)
{
        free(cv_LogBuf);
        cv_LogBuf = NULL;
        cv_LogPtr = 0;
        cv_LStart = 0;
        cv_LCount = 0;
}

static BOOL CreateBinBuf(void)
{
        if (cv_BinBuf==NULL)
        {
                cv_BinBuf = (PCHAR)malloc(InBuffSize);
                cv_BinPtr = 0;
                cv_BStart = 0;
                cv_BCount = 0;
        }
        return (cv_BinBuf!=NULL);
}

static void FreeBinBuf(void)
{
        free(cv_BinBuf);
        cv_BinBuf = NULL;
        cv_BinPtr = 0;
        cv_BStart = 0;
        cv_BCount = 0;
}

static void FileTransEnd_(PFileVar fv)
{
        fv->FileLog = FALSE;
        fv->BinLog = FALSE;
        cv.Log1Byte = NULL;
        cv.Log1Bin = NULL;
        cv.LogBinSkip = NULL;
        PFileTransDlg FLogDlg = fv->FLogDlg;
        if (FLogDlg != NULL) {
                FLogDlg->DestroyWindow();
                FLogDlg = NULL;
                fv->FLogDlg = NULL;
        }
        CloseFileSync(fv);
        FreeLogBuf();
        FreeBinBuf();
        free(fv->FullName);
        fv->FullName = NULL;
        free(fv);

        LogVar = NULL;
}

/**
 *      ���O���|�[�Y����
 */
void FLogPause(BOOL Pause)
{
        PFileVar fv = LogVar;
        if (fv == NULL) {
                return;
        }
        fv->IsPause = Pause;
        fv->FLogDlg->ChangeButton(Pause);
}

/**
 *      ���O���[�e�[�g������
 *      ���O���T�C�Y��<size>�o�C�g���������������A���[�e�[�V��������������������
 */
void FLogRotateSize(size_t size)
{
        PFileVar fv = LogVar;
        if (fv == NULL) {
                return;
        }
        fv->RotateMode = ROTATE_SIZE;
        fv->RotateSize = (LONG)size;
}

/**
 *      ���O���[�e�[�g������
 *      ���O�t�@�C������������������
 */
void FLogRotateRotate(int step)
{
        PFileVar fv = LogVar;
        if (fv == NULL) {
                return;
        }
        fv->RotateStep = step;
}

/**
 *      ���O���[�e�[�g������
 *      ���[�e�[�V���������~
 */
void FLogRotateHalt(void)
{
        PFileVar fv = LogVar;
        if (fv == NULL) {
                return;
        }
        fv->RotateMode = ROTATE_NONE;
        fv->RotateSize = 0;
        fv->RotateStep = 0;
}

static INT_PTR CALLBACK OnCommentDlgProc(HWND hDlgWnd, UINT msg, WPARAM wp, LPARAM)
{
        static const DlgTextInfo TextInfos[] = {
                { 0, "DLG_COMMENT_TITLE" },
                { IDOK, "BTN_OK" }
        };

        switch (msg) {
                case WM_INITDIALOG:
                        // �G�f�B�b�g�R���g���[�����t�H�[�J�X��������
                        SetFocus(GetDlgItem(hDlgWnd, IDC_EDIT_COMMENT));
                        SetDlgTextsW(hDlgWnd, TextInfos, _countof(TextInfos), ts.UILanguageFileW);
                        return FALSE;

                case WM_COMMAND:
                        switch (LOWORD(wp)) {
                                case IDOK: {
                                        size_t len = SendDlgItemMessageW(hDlgWnd, IDC_EDIT_COMMENT, WM_GETTEXTLENGTH, 0, 0);
                                        len += 1;
                                        wchar_t *buf = (wchar_t *)malloc(len * sizeof(wchar_t));
                                        GetDlgItemTextW(hDlgWnd, IDC_EDIT_COMMENT, buf, (int)len);
                                        FLogWriteStr(buf);
                                        FLogWriteStr(L"\n");            // TODO ���s�R�[�h
                                        free(buf);
                                        TTEndDialog(hDlgWnd, IDOK);
                                        break;
                                }
                                default:
                                        return FALSE;
                        }
                        break;

                case WM_CLOSE:
                        TTEndDialog(hDlgWnd, 0);
                        return TRUE;

                default:
                        return FALSE;
        }
        return TRUE;
}

/**
 * ���O�t�@�C�����R�����g���������� (2004.8.6 yutaka)
 */
void FLogAddCommentDlg(HINSTANCE hInst, HWND hWnd)
{
        PFileVar fv = LogVar;
        if (fv == NULL) {
                return;
        }
        TTDialogBox(hInst, MAKEINTRESOURCE(IDD_COMMENT_DIALOG),
                                hWnd, OnCommentDlgProc);
}

void FLogClose(void)
{
        PFileVar fv = LogVar;
        if (fv == NULL) {
                return;
        }

        FileTransEnd_(fv);
}

/**
 *      ���O���I�[�v������
 *      @param[in]      fname   ���O�t�@�C����, CreateFile()���n������
 *
 *      ���O�t�@�C������strftime���W�J�������s���������B
 *      FLogGetLogFilename() �� FLogOpenDialog() ��
 *      �t�@�C�����������������B
 */
BOOL FLogOpen(const wchar_t *fname, LogCode_t code, BOOL bom)
{
        if (LogVar != NULL) {
                return FALSE;
        }

        //
        PFileVar fv = (PFileVar)malloc(sizeof(*fv));
        if (fv == NULL) {
                return FALSE;
        }
        LogVar = fv;
        memset(fv, 0, sizeof(TFileVar));
        fv->FileHandle = INVALID_HANDLE_VALUE;
        fv->LogThread = INVALID_HANDLE_VALUE;
        fv->eLineEnd = Line_LineHead;

        fv->log_code = code;
        fv->bom = bom;
        BOOL ret = LogStart(fv, fname);
        if (ret == FALSE) {
                FileTransEnd_(fv);
        }

        return ret;
}

BOOL FLogIsOpend(void)
{
        return LogVar != NULL;
}

BOOL FLogIsOpendText(void)
{
        return LogVar != NULL && LogVar->FileLog;
}

BOOL FLogIsOpendBin(void)
{
        return LogVar != NULL && LogVar->BinLog;
}

void FLogWriteStr(const wchar_t *str)
{
        if (LogVar != NULL) {
                OutputStr(str);
        }
}

void FLogInfo(char *param_ptr, size_t param_len)
{
        PFileVar fv = LogVar;
        if (fv) {
                param_ptr[0] = '0'
                        + (ts.LogBinary != 0)
                        + ((ts.Append != 0) << 1)
                        + ((ts.LogTypePlainText != 0) << 2)
                        + ((ts.LogTimestamp != 0) << 3)
                        + ((ts.LogHideDialog != 0) << 4);
                char *filenameU8 = ToU8W(fv->FullName);
                strncpy_s(param_ptr + 1, param_len - 1, filenameU8, _TRUNCATE);
                free(filenameU8);
        }
        else {
                param_ptr[0] = '0' - 1;
                param_ptr[1] = 0;
        }
}

/**
 *      ���������O�t�@�C����������
 */
const wchar_t *FLogGetFilename(void)
{
        if (LogVar == NULL) {
                return NULL;
        }
        return LogVar->FullName;
}

/**
 *      ���O�_�C�A���O���J��
 *      @param[in,out]  info.filename   �t�@�C���������l
 *                                                                      OK���A�t�@�C�����A�s�v����������free()��������
 *      @retval TRUE    [ok] ����������
 *      @retval FALSE   �L�����Z��������
 */
BOOL FLogOpenDialog(HINSTANCE hInst, HWND hWnd, FLogDlgInfo_t *info)
{
        LogDlgWork_t *work = (LogDlgWork_t *)calloc(sizeof(LogDlgWork_t), 1);
        wchar_t *srcfnameW = FLogGetLogFilename(info->filename);
        work->info = info;
        work->info->filename = srcfnameW;
        work->pts = &ts;
        work->pcv = &cv;
        INT_PTR ret = TTDialogBoxParam(
                hInst, MAKEINTRESOURCE(IDD_LOGDLG),
                hWnd, LogFnHook, (LPARAM)work);
        free(srcfnameW);
        free(work);
        return ret == IDOK ? TRUE : FALSE;
}

/**
 *      ���O�t�@�C����������
 *      ���O�t�@�C�����p���C�����s��
 *      - strftime() ���������t�W�J
 *      - �������������O�t�@�C���t�H���_������
 *      - �z�X�g��,�|�[�g�����W�J
 *
 *      @param[in]      log_filename    �t�@�C����(����/��������������ok)
 *                                                              NULL�������f�t�H���g�t�@�C����������
 *                                                              strftime�`��ok
 *      @return                                         �t���p�X�t�@�C����
 *                                                              �s�v���������� free() ��������
 */
wchar_t *FLogGetLogFilename(const wchar_t *log_filename)
{
        const char *logdir = ToCharW(ts.LogDefaultPathW);

        // ���������t�@�C����
        char base_name[MAX_PATH];
        if (log_filename == NULL) {
                strncpy_s(base_name, _countof(base_name), ts.LogDefaultName, _TRUNCATE);
        }
        else {
                char *filenameA = ToCharW(log_filename);
                strncpy_s(base_name, _countof(base_name), filenameA, _TRUNCATE);
                free(filenameA);
        }

        // �t���p�X��
        char full_path[MAX_PATH];
        ConvFName(logdir, base_name, sizeof(base_name), "", full_path, sizeof(full_path));
        ParseStrftimeFileName(full_path, sizeof(full_path));
        ConvertLogname(full_path, sizeof(full_path));

        free((void *)logdir);
        return ToWcharA(full_path);
}

BOOL FLogIsPause()
{
        if (LogVar == NULL) {
                return FALSE;
        }
        return LogVar->IsPause;
}

void FLogWindow(int nCmdShow)
{
        if (LogVar == NULL) {
                return;
        }

        HWND HWndLog = LogVar->FLogDlg->m_hWnd;
        ShowWindow(HWndLog, nCmdShow);
        if (nCmdShow == SW_RESTORE) {
                // �g���X�^�C�� WS_EX_NOACTIVATE ��������������
                SetForegroundWindow(HWndLog);
        }
}

void FLogShowDlg(void)
{
        if (LogVar == NULL) {
                return;
        }
        HWND HWndLog = LogVar->FLogDlg->m_hWnd;
        ShowWindow(HWndLog, SW_SHOWNORMAL);
        SetForegroundWindow(HWndLog);
}

/**
 * ���O��1byte��������
 *              LogPut1() ������?
 */
//void Log1Bin(PComVar cv, BYTE b)
static void Log1Bin(BYTE b)
{
        if (LogVar->IsPause || ProtoGetProtoFlag()) {
                return;
        }
        if (cv_BinSkip > 0) {
                cv_BinSkip--;
                return;
        }
        cv_BinBuf[cv_BinPtr] = b;
        cv_BinPtr++;
        if (cv_BinPtr>=InBuffSize) {
                cv_BinPtr = cv_BinPtr-InBuffSize;
        }
        if (cv_BCount>=InBuffSize) {
                cv_BCount = InBuffSize;
                cv_BStart = cv_BinPtr;
        }
        else {
                cv_BCount++;
        }
}

static void LogBinSkip(int add)
{
        if (cv_BinBuf != NULL) {
                cv_BinSkip += add;
        }
}

/**
 *      ���O�o�b�t�@���������������f�[�^���o�C�g��������
 */
int FLogGetCount(void)
{
        PFileVar fv = LogVar;
        if (fv == NULL) {
                return 0;
        }
        if (fv->FileLog) {
                return cv_LCount;
        }
        if (fv->BinLog) {
                return cv_BCount;
        }
        return 0;
}

/**
 *      ���O�o�b�t�@�������o�C�g��������
 */
int FLogGetFreeCount(void)
{
        PFileVar fv = LogVar;
        if (fv == NULL) {
                return 0;
        }
        if (fv->FileLog) {
                return InBuffSize - cv_LCount;
        }
        if (fv->BinLog) {
                return InBuffSize - cv_BCount;
        }
        return 0;
}

/**
 * �o�b�t�@�������O���t�@�C������������
 */
void FLogWriteFile(void)
{
        PFileVar fv = LogVar;
        if (fv == NULL) {
                return;
        }
        if (cv_LogBuf!=NULL)
        {
                if (fv->FileLog) {
                        LogToFile(fv);
                }
        }

        if (cv_BinBuf!=NULL)
        {
                if (fv->BinLog) {
                        LogToFile(fv);
                }
        }
}

void FLogPutUTF32(unsigned int u32)
{
        PFileVar fv = LogVar;
        BOOL log_available = (cv_LogBuf != 0);

        if (!log_available) {
                // ���O�����o��������
                return;
        }

        // �s����?(���s���o����������)
        if (ts.LogTimestamp && fv->eLineEnd) {
                // �^�C���X�^���v���o��
                fv->eLineEnd = Line_Other; /* clear endmark*/
                wchar_t* strtime = TimeStampStr(fv);
                FLogWriteStr(strtime);
                free(strtime);
        }

        switch(fv->log_code) {
        case LOG_UTF8: {
                // UTF-8
                char u8_buf[4];
                size_t u8_len = UTF32ToUTF8(u32, u8_buf, _countof(u8_buf));
                for (size_t i = 0; i < u8_len; i++) {
                        BYTE b = u8_buf[i];
                        LogPut1(b);
                }
                break;
        }
        case LOG_UTF16LE:
        case LOG_UTF16BE: {
                // UTF-16
                wchar_t u16[2];
                size_t u16_len = UTF32ToUTF16(u32, u16, _countof(u16));
                for (size_t i = 0; i < u16_len; i++) {
                        if (fv->log_code == LOG_UTF16LE) {
                                // UTF-16LE
                                LogPut1(u16[i] & 0xff);
                                LogPut1((u16[i] >> 8) & 0xff);
                        }
                        else {
                                // UTF-16BE
                                LogPut1((u16[i] >> 8) & 0xff);
                                LogPut1(u16[i] & 0xff);
                        }
                }
        }
        }

        if (u32 == 0x0a) {
                fv->eLineEnd = Line_LineHead; /* set endmark*/
        }
}

static void FLogOutputBOM(PFileVar fv)
{
        DWORD wrote;

        switch(fv->log_code) {
        case 0: {
                // UTF-8
                const char *bom = "\xef\xbb\xbf";
                WriteFile(fv->FileHandle, bom, 3, &wrote, NULL);
                fv->ByteCount += 3;
                break;
        }
        case 1: {
                // UTF-16LE
                const char *bom = "\xff\xfe";
                WriteFile(fv->FileHandle, bom, 2, &wrote, NULL);
                fv->ByteCount += 2;
                break;
        }
        case 2: {
                // UTF-16BE
                const char *bom = "\xfe\xff";
                WriteFile(fv->FileHandle, bom, 2, &wrote, NULL);
                fv->ByteCount += 2;
                break;
        }
        default:
                break;
        }
}

static void OutputStr(const wchar_t *str)
{
        size_t len;

        assert(str != NULL);

        len = wcslen(str);
        while(*str != 0) {
                unsigned int u32;
                size_t u16_len = UTF16ToUTF32(str, len, &u32);
                switch (u16_len) {
                case 0:
                default:
                        // ������������
                        str++;
                        len--;
                        break;
                case 1:
                case 2: {
                        FLogPutUTF32(u32);
                        str += u16_len;
                        len -= u16_len;
                        break;
                }
                }
        }
}