/////////////////////////////////////////////////////////////////////////////
// WinMerge: an interactive diff/merge utility
// Copyright (C) 1997-2000 Thingamahoochie Software
// Author: Dean Grimm
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
/////////////////////////////////////////////////////////////////////////////
/**
* @file codepage.cpp
*/
// RCS ID line follows -- this is updated by CVS
// $Id: codepage.cpp,v 1.6 2005/12/03 21:50:50 elsapo Exp $
#include "stdafx.h"
#include "Merge.h"
#include "codepage.h"
#include "DirScan.h" // for DirScan_InitializeDefaultCodepage
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
static void initialize();
static int f_nDefaultCodepage; // store the default codepage as specified by user in options
static int f_bInitialized = false;
// map number to bit code
enum { CP_SUPPORTED_FLAG=0x01, CP_INSTALLED_FLAG=0x10 };
static CMap<int, int, int, int> f_codepage_status;
// map name to number
// eg, "CP-1252" => 1252
static CMap<CString, LPCTSTR, int, int> f_codepageAliases;
// map codepage number to index in f_codepageinfo
static CMap<int, int, int, int> f_codepage_info_index;
/**
* @brief Update the appropriate default codepage
*/
void updateDefaultCodepage(int cpDefaultMode, int customCodepage)
{
int wLangId;
switch (cpDefaultMode)
{
case 0:
f_nDefaultCodepage = GetACP();
break;
case 1:
TCHAR buff[32];
wLangId = theApp.GetLangId();
if (GetLocaleInfo(wLangId, LOCALE_IDEFAULTANSICODEPAGE, buff, sizeof(buff)/sizeof(buff[0])))
f_nDefaultCodepage = _ttol(buff);
else
f_nDefaultCodepage = GetACP();
break;
case 2:
f_nDefaultCodepage = customCodepage;
break;
default:
// no other valid option
ASSERT (0);
f_nDefaultCodepage = GetACP();
}
// Set default codepage
DirScan_InitializeDefaultCodepage();
}
/**
* @brief Get appropriate default codepage
*/
int getDefaultCodepage()
{
return f_nDefaultCodepage;
}
/**
* @brief Record a codepage alias string (ok if already recorded)
*/
static void RecordAlias(LPCTSTR alias, int codepage)
{
f_codepageAliases[alias] = codepage;
}
/**
* @brief Record all the obvious codepage aliases (eg, "CP-1252" for 1252)
*/
static void RecordAliases(LPCTSTR lpCodePageString, int codepage)
{
if (codepage > 400 && codepage < 1000)
{
RecordAlias((CString)_T("CP-") + lpCodePageString, codepage);
RecordAlias((CString)_T("CP") + lpCodePageString, codepage);
}
if (codepage > 800 && codepage < 1300)
{
RecordAlias((CString)_T("CP-") + lpCodePageString, codepage);
RecordAlias((CString)_T("CP") + lpCodePageString, codepage);
RecordAlias((CString)_T("windows-") + lpCodePageString, codepage);
}
}
/**
* @brief Callback used by initializeCodepages
*/
static BOOL CALLBACK EnumInstalledCodePagesProc(LPTSTR lpCodePageString)
{
int codepage = _ttol(lpCodePageString);
if (codepage)
{
int value = 0;
f_codepage_status.Lookup(codepage, value);
value |= CP_INSTALLED_FLAG; // installed
f_codepage_status[codepage] = value;
RecordAliases(lpCodePageString, codepage);
}
return TRUE; // continue enumeratino
}
/**
* @brief Callback used by initializeCodepages
*/
static BOOL CALLBACK EnumSupportedCodePagesProc(LPTSTR lpCodePageString)
{
int codepage = _ttol(lpCodePageString);
if (codepage)
{
int value = 0;
f_codepage_status.Lookup(codepage, value);
value |= CP_SUPPORTED_FLAG; // supported (but not necessarily installed)
f_codepage_status[codepage] = value;
RecordAliases(lpCodePageString, codepage);
}
return TRUE; // continue enumeratino
}
/**
* @brief Load information about codepages into local cache
*/
static void initializeCodepageStatuses()
{
EnumSystemCodePages(EnumInstalledCodePagesProc, CP_INSTALLED);
EnumSystemCodePages(EnumSupportedCodePagesProc, CP_SUPPORTED);
}
/**
* @brief Return true if specified codepage is installed on this system (according to EnumSystemCodePages)
*/
bool isCodepageInstalled(int codepage)
{
initialize();
int value=0;
return f_codepage_status.Lookup(codepage, value) && (value & CP_INSTALLED_FLAG);
}
/**
* @brief Return true if specified codepage is supported on this system (according to EnumSystemCodePages)
*/
bool isCodepageSupported(int codepage)
{
initialize();
int value=0;
return f_codepage_status.Lookup(codepage, value) && (value & CP_SUPPORTED_FLAG);
}
static codepage_wminfo f_codepageinfo[] = {
{ 37, IDS_CP_EBCDIC, 0, IDS_CPG_WESTERN_EUROPEAN, IDS_CPP_IBM }
, { 437, IDS_CP_DOS_US, 0, IDS_CPG_WESTERN_EUROPEAN, IDS_CPP_DOS }
, { 708, IDS_CP_DOS_ARABIC, 0, IDS_CPG_MIDDLE_EASTERN, IDS_CPP_DOS }
, { 737, IDS_CP_DOS_GREEK, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_DOS }
, { 775, IDS_CP_DOS_BALTIC, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_DOS }
, { 850, IDS_CP_DOS_LATIN1, 0, IDS_CPG_WESTERN_EUROPEAN, IDS_CPP_DOS }
, { 851, IDS_CP_DOS_GREEK1, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_DOS }
, { 852, IDS_CP_DOS_LATIN2, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_DOS }
, { 855, IDS_CP_DOS_CYRILLIC, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_DOS }
, { 857, IDS_CP_DOS_TURKISH, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_DOS }
, { 860, IDS_CP_DOS_PORTUGUESE, 0, IDS_CPG_WESTERN_EUROPEAN, IDS_CPP_DOS }
, { 861, IDS_CP_DOS_ICELANDIC, 0, IDS_CPG_WESTERN_EUROPEAN, IDS_CPP_DOS }
, { 862, IDS_CP_DOS_HEBREW, 0, IDS_CPG_MIDDLE_EASTERN, IDS_CPP_DOS }
, { 863, IDS_CP_DOS_FRENCH_CANADA, 0, IDS_CPG_WESTERN_EUROPEAN, IDS_CPP_DOS }
, { 865, IDS_CP_DOS_NORDIC, 0, IDS_CPG_WESTERN_EUROPEAN, IDS_CPP_DOS }
, { 866, IDS_CP_DOS_CYRILLIC_CIS1, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_DOS }
, { 869, IDS_CP_DOS_GREEK2, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_DOS }
, { 874, IDS_CP_WINDOWS_THAI, 0, IDS_CPG_SOUTH_ASIAN, IDS_CPP_WINDOWS }
, { 932, IDS_CP_WINDOWS_JAPANESE, IDS_CP_WINDOWS_JAPANESE_EXTRA, IDS_CPG_EAST_ASIAN, IDS_CPP_WINDOWS }
, { 936, IDS_CP_WINDOWS_CHINESE_SIMP, IDS_CP_WINDOWS_CHINESE_SIMP_EXTRA, IDS_CPG_EAST_ASIAN, IDS_CPP_WINDOWS }
, { 949, IDS_CP_WINDOWS_KOREAN, IDS_CP_WINDOWS_KOREAN_EXTRA, IDS_CPG_EAST_ASIAN, IDS_CPP_WINDOWS }
, { 950, IDS_CP_WINDOWS_CHINESE_TRAD, IDS_CP_WINDOWS_CHINESE_TRAD_EXTRA, IDS_CPG_EAST_ASIAN, IDS_CPP_WINDOWS }
, { 1250, IDS_CP_WINDOWS_LATIN2, IDS_CP_WINDOWS_LATIN2_EXTRA, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_WINDOWS }
, { 1251, IDS_CP_WINDOWS_CYRILLIC, IDS_CP_WINDOWS_CYRILLIC_EXTRA, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_WINDOWS }
, { 1252, IDS_CP_WINDOWS_LATIN1, IDS_CP_WINDOWS_LATIN1_EXTRA, IDS_CPG_WESTERN_EUROPEAN, IDS_CPP_WINDOWS }
, { 1253, IDS_CP_WINDOWS_GREEK, IDS_CP_WINDOWS_GREEK_EXTRA, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_WINDOWS }
, { 1254, IDS_CP_WINDOWS_TURKISH, IDS_CP_WINDOWS_TURKISH_EXTRA, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_WINDOWS }
, { 1255, IDS_CP_WINDOWS_HEBREW, IDS_CP_WINDOWS_HEBREW_EXTRA, IDS_CPG_MIDDLE_EASTERN, IDS_CPP_WINDOWS }
, { 1256, IDS_CP_WINDOWS_ARABIC, 0, IDS_CPG_MIDDLE_EASTERN, IDS_CPP_WINDOWS }
, { 1257, IDS_CP_WINDOWS_BALTIC, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_WINDOWS }
, { 1258, IDS_CP_WINDOWS_VIETNAM, 0, IDS_CPG_SOUTH_ASIAN, IDS_CPP_WINDOWS }
, { 10000, IDS_CP_MACINTOSH_ROMAN, 0, IDS_CPG_WESTERN_EUROPEAN, IDS_CPP_MACINTOSH }
, { 10006, IDS_CP_MACINTOSH_GREEK, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_MACINTOSH }
, { 10007, IDS_CP_MACINTOSH_CYRILLIC, 0, IDS_CPG_WESTERN_EUROPEAN, IDS_CPP_MACINTOSH }
, { 10029, IDS_CP_MACINTOSH_CENTRAL_EUROPE, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_MACINTOSH }
, { 10079, IDS_CP_MACINTOSH_ICELANDIC, 0, IDS_CPG_WESTERN_EUROPEAN, IDS_CPP_MACINTOSH }
, { 20880, IDS_CP_IBM_EBCDIC_CYRILLIC, 0, IDS_CPG_EASTERN_EUROPEAN, IDS_CPP_IBM }
, { 10081, IDS_CP_MACINTOSH_TURKISH, 0, IDS_CPG_MIDDLE_EASTERN, IDS_CPP_MACINTOSH }
, { 65000, IDS_CP_UTF7, 0, IDS_CPG_NA, IDS_CPP_NA }
, { 65001, IDS_CP_UTF8, 0, IDS_CPG_NA, IDS_CPP_NA }
};
const codepage_wminfo * getCodepageInfo(int codepage)
{
initialize();
int index=-1;
if (!f_codepage_info_index.Lookup(codepage, index))
return NULL;
return &f_codepageinfo[index];
}
/**
* @brief Load map used for finding codepage in f_codepageinfo
*/
static void initializeCodepageInfo()
{
for (int i=0; i<sizeof(f_codepageinfo)/sizeof(f_codepageinfo[0]); ++i)
{
codepage_wminfo * info = &f_codepageinfo[i];
f_codepage_info_index[info->codepage] = i;
}
}
/**
* @brief Initialize all local information stores (ie, maps)
*/
static void initialize()
{
if (f_bInitialized) return;
initializeCodepageStatuses();
initializeCodepageInfo();
f_bInitialized = true;
}
/**
* @brief Populate caller's array with all installed codepages (or all supported codepages)
*/
void getCodepages(CArray<int, int> * pages, bool includeUninstalled)
{
initialize();
pages->SetSize(0, f_codepage_status.GetCount()); // make first allocation big enough
for (POSITION pos = f_codepage_status.GetStartPosition(); pos; )
{
int codepage=0, status=0;
f_codepage_status.GetNextAssoc(pos, codepage, status);
if (status & CP_INSTALLED_FLAG)
{
pages->Add(codepage);
}
else if (includeUninstalled && (status & CP_SUPPORTED_FLAG))
{
pages->Add(codepage);
}
}
}
