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UltimateToolbox/UltimateToolbox93_src/Ultimate Toolbox/source/Path.cpp
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2025-11-27 16:46:48 +09:00

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// ==========================================================================
// Class Implementation : COXPathSpec
// ==========================================================================
// Source file : path.cpp
// Version: 9.3
// This software along with its related components, documentation and files ("The Libraries")
// is © 1994-2007 The Code Project (1612916 Ontario Limited) and use of The Libraries is
// governed by a software license agreement ("Agreement"). Copies of the Agreement are
// available at The Code Project (www.codeproject.com), as part of the package you downloaded
// to obtain this file, or directly from our office. For a copy of the license governing
// this software, you may contact us at legalaffairs@codeproject.com, or by calling 416-849-8900.
// //////////////////////////////////////////////////////////////////////////
#include "stdafx.h" // standard MFC include
#include "path.h" // class specification
#include "xstring.h" // for string-int conversion
#ifndef WIN32
#include "toolhelp.h" // To determine the module handle
#endif
#include <direct.h> // For directory functions (_fullpath, ...)
#include <dos.h> // For _dos_setfileattr, ...
#include <io.h> // For _chsize()
#include "UTBStrOp.h"
#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif
IMPLEMENT_DYNAMIC(COXPathSpec, COXDirSpec)
#define new DEBUG_NEW
/////////////////////////////////////////////////////////////////////////////
// Definition of static members
// Data members -------------------------------------------------------------
// protected:
// private:
// Member functions ---------------------------------------------------------
// public:
COXPathSpec::COXPathSpec()
{
}
COXPathSpec::COXPathSpec(LPCTSTR pszPath)
{
if (!SetPath(pszPath))
{
TRACE(_T("COXPathSpec::COXPathSpec : An invalid path (%s) was specified, clearing object\n"),
pszPath);
SetPath(_T(""));
}
}
COXPathSpec::COXPathSpec(const COXPathSpec& pathSrc)
:
COXDirSpec(pathSrc),
COXFileSpec(pathSrc)
{
}
COXPathSpec& COXPathSpec::operator=(const COXPathSpec& pathSrc)
{
COXDirSpec::operator=(pathSrc);
COXFileSpec::operator=(pathSrc);
return *this;
}
CString COXPathSpec::GetPath() const
{
CString sDir = GetDirectory();
CString sFile = GetFileName();
CString sPath;
if (!sFile.IsEmpty())
if (!sDir.IsEmpty())
if (sDir.Right(1) != CString(_T("\\")))
// \\DIR and AAA.BBB
sPath = sDir + _T("\\") + sFile;
else
// \\ and AAA.BBB
sPath = sDir + sFile;
else
// empty and AAA.BBB
sPath = sFile;
else
// \\DIR and empty
sPath = sDir;
return sPath;;
}
BOOL COXPathSpec::SetPath(LPCTSTR pszPath)
{
TCHAR pszDrive[_MAX_DRIVE];
TCHAR pszSubdir[_MAX_DIR];
TCHAR pszBaseName[_MAX_FNAME];
TCHAR pszExtender[_MAX_EXT];
UTBStr::tsplitpath(pszPath, pszDrive, _MAX_DRIVE, pszSubdir, _MAX_DIR, pszBaseName, _MAX_FNAME, pszExtender, _MAX_EXT);
// _tsplitpath(pszPath, pszDrive, pszSubdir, pszBaseName, pszExtender);
size_t nSubDir = _tcsclen(pszSubdir);
if (1 < nSubDir)
// ... When not empty and not root, remove trailing back slash
pszSubdir[nSubDir - 1] = _T('\0');
size_t nExt = _tcsclen(pszExtender);
if (1 <= nExt)
// ... Remove leading full stop
UTBStr::tcscpy(pszExtender, _MAX_EXT, pszExtender + 1);
return SetDrive(pszDrive) && SetSubdirectory(pszSubdir) &&
SetExtender(pszExtender) && SetBaseName(pszBaseName);
}
void COXPathSpec::ForceSetPath(LPCTSTR pszPath)
{
TCHAR pszDrive[_MAX_DRIVE];
TCHAR pszSubdir[_MAX_DIR];
TCHAR pszBaseName[_MAX_FNAME];
TCHAR pszExtender[_MAX_EXT];
UTBStr::tsplitpath(pszPath, pszDrive, _MAX_DRIVE, pszSubdir, _MAX_DIR, pszBaseName, _MAX_FNAME, pszExtender, _MAX_EXT);
size_t nSubDir = _tcsclen(pszSubdir);
if (1 < nSubDir)
// ... When not empty and not root, remove trailing back slash
pszSubdir[nSubDir - 1] = '\0';
size_t nExt = _tcsclen(pszExtender);
if (1 <= nExt)
// ... Remove leading full stop
UTBStr::tcscpy(pszExtender, _MAX_EXT, pszExtender + 1);
ForceSetDrive(pszDrive);
ForceSetSubdirectory(pszSubdir);
ForceSetExtender(pszExtender);
ForceSetBaseName(pszBaseName);
}
BOOL COXPathSpec::SetPath(const COXDirSpec& dirSpec, const COXFileSpec& fileSpec)
{
COXDirSpec::operator=(dirSpec);
COXFileSpec::operator=(fileSpec);
return TRUE;
}
CString COXPathSpec::GetShortDescription()
{
// ... If path spec is empty, just return
if (GetPath().IsEmpty())
return _T("");
COXPathSpec tempPath(*this);
CString sLastSubdir;
CString sEliminatedDirs = _T("\\..\\");
// First try to make absolute path
if (!tempPath.MakeAbsolute())
{
TRACE(_T("COXPathSpec::GetShortDescription : Could not make absolute path, returning full path spec\n"));
return GetPath();
}
// Get the last subdir
sLastSubdir = tempPath.GetLastSubdirectory().GetSubdirectory();
// ... Last subdir should never contain back slashes
ASSERT(sLastSubdir.Find(_T('\\')) == -1);
// ... If last subdir is empty (root) or equals dir itself,
// no subdirs have been eliminated
if (sLastSubdir.IsEmpty())
sEliminatedDirs.Empty();
else if ((_T("\\") + sLastSubdir) == tempPath.GetSubdirectory())
sEliminatedDirs = _T("\\");
// Return the composed short description
return tempPath.GetDrive() + sEliminatedDirs + sLastSubdir + _T("\\") + tempPath.GetFileName();
}
BOOL COXPathSpec::GetShortPathName(CString& sShortPath)
{
sShortPath=GetPath();
// ... If path spec is empty, just return
if (sShortPath.IsEmpty())
return FALSE;
#ifdef WIN32
COXPathSpec tempPath(*this);
// First try to make absolute path
tempPath.MakeAbsolute();
CString sPath=tempPath.GetPath();
BOOL bResult=(::GetShortPathName(sPath,sShortPath.GetBuffer(MAX_PATH),
MAX_PATH)>0);
sShortPath.ReleaseBuffer();
return bResult;
#else
return TRUE;
#endif
}
BOOL COXPathSpec::MakeTemp(BOOL bCreateEmpty /* = TRUE */, LPCTSTR pszPrefix /* = _T("TMP") */,
LPCTSTR pszTempDir /* = _T("") */)
{
TCHAR path_buffer[_MAX_PATH + 1];
*path_buffer = _T('\0');
#ifdef WIN32
// Get temp path
BOOL bSucces = TRUE;
CString sTempPath(pszTempDir);
if (sTempPath.IsEmpty())
{
bSucces = ::GetTempPath(_MAX_PATH, sTempPath.GetBuffer(_MAX_PATH));
sTempPath.ReleaseBuffer();
}
if (!bSucces)
return FALSE;
if (!::GetTempFileName(sTempPath, // Use the default drive
pszPrefix, // Temporary file name prefix
0, // Generate number and create file
path_buffer)) // Result
return FALSE;
#else
// Get temp path
pszTempDir;
::GetTempFileName(0, // Use the default drive
pszPrefix, // Temporary file name prefix
0, // Generate number and create file
path_buffer); // Result
#endif
if (*path_buffer != _T('\0'))
{
BOOL bResult = SetPath(path_buffer);
if (bCreateEmpty)
{
// Empty file should have been created by ::GetTempFileName
ASSERT(Exists());
}
else
{
// Delete empty file created by ::GetTempFileName
VERIFY(DoRemove());
ASSERT(!Exists());
}
return bResult;
}
else
{
TRACE(_T("COXPathSpec::MakeTemp : Could not make temporary path spec\n"));
return FALSE;
}
}
BOOL COXPathSpec::MakeAbsolute()
{
// If no file name was specified, just return
// Apparently in WIN32 _fullpath returns the apllications full path
// in this case (??)
if (GetFileName().IsEmpty())
return TRUE;
TCHAR pszFullPath[_MAX_PATH];
if (_tfullpath(pszFullPath, (LPCTSTR)GetPath(), _MAX_PATH) != NULL)
return SetPath(pszFullPath);
else
return FALSE;
}
BOOL COXPathSpec::MakeUnique()
{
if (GetBaseName().IsEmpty())
SetBaseName(_T("unique"));
if (!Exists())
return TRUE;
// Change the name by first adding underscores, until 8 characters are used.
// Then the last character(s) are replaced by a number starting from 2,
// until a unique name is found.
COXString sNumber = _T("2");
CString sBaseName = GetBaseName().Left(8);
while (sBaseName.GetLength() < 8)
sBaseName += _T("_");
ASSERT(sBaseName.GetLength() == 8);
ASSERT(Exists());
do
{
sBaseName = sBaseName.Left(8 - sNumber.GetLength());
sBaseName += sNumber;
VERIFY(SetBaseName(sBaseName));
sNumber = sNumber.GetInt() + 1; // Implicit conversion to int
}
while(Exists());
return TRUE;
}
BOOL COXPathSpec::Exists() const
{
CFileStatus fileStatus;
return CFile::GetStatus(GetPath(), fileStatus);
}
BOOL COXPathSpec::IsEmpty() const
{
return COXDirSpec::IsEmpty() && COXFileSpec::IsEmpty();
}
void COXPathSpec::Empty()
{
COXDirSpec::Empty();
COXFileSpec::Empty();
}
BOOL COXPathSpec::DoSearch(COXFileSpec fileName, COXDirSpec startingDir /* = COXDirSpec() */,
BOOL bRecursively /* = FALSE */)
{
COXPathSpec resultPath;
COXDirSpec currentDir;
// First store the current dir
VERIFY(currentDir.DoGetCurrentDir());
// 1. Check the specified directory
if (!startingDir.IsEmpty())
{
resultPath.SetPath(startingDir, fileName);
if (resultPath.Exists())
{
*this = resultPath;
return TRUE;
}
}
// 2. Check the subdirectories of the specified directory
// ... Recursive search is not yet implemented
ASSERT(!bRecursively);
bRecursively;
// 3 Check the EXE-directory
TCHAR pszModulePath[_MAX_PATH];
if (::GetModuleFileName(GetThisModule(), pszModulePath, _MAX_PATH) != 0)
{
VERIFY(resultPath.SetPath(pszModulePath));
resultPath.COXFileSpec::operator=(fileName);
if (resultPath.Exists())
{
*this = resultPath;
return TRUE;
}
}
else
{
TRACE(_T("COXPathSpec::DoSearch : Could not retrieve the path of the running application\n"));
}
// 4. Check the current directory
if (!currentDir.IsEmpty())
{
resultPath.SetPath(currentDir, fileName);
if (resultPath.Exists())
{
*this = resultPath;
return TRUE;
}
}
// 5. Check the Windows directory
TCHAR pszWinDir[_MAX_DIR];
if (::GetWindowsDirectory(pszWinDir, _MAX_DIR) != 0)
{
VERIFY(resultPath.SetDirectory(pszWinDir));
resultPath.COXFileSpec::operator=(fileName);
if (resultPath.Exists())
{
*this = resultPath;
return TRUE;
}
}
else
{
TRACE(_T("COXPathSpec::DoSearch : Could not retrieve the Windows directory\n"));
}
// 6. Check the System directory
TCHAR pszSystemDir[_MAX_DIR];
if (::GetSystemDirectory(pszSystemDir, _MAX_DIR) != 0)
{
VERIFY(resultPath.SetDirectory(pszSystemDir));
resultPath.COXFileSpec::operator=(fileName);
if (resultPath.Exists())
{
*this = resultPath;
return TRUE;
}
}
else
{
TRACE(_T("COXPathSpec::DoSearch : Could not retrieve the Windows directory\n"));
}
// 7. Check the directories of PATH-environment variable
TCHAR pszResultPath[_MAX_PATH];
if (SearchEnvironment(fileName.GetFileName(), _T("PATH"), pszResultPath))
{
ASSERT(*pszResultPath != '\0');
VERIFY(SetPath(pszResultPath));
return TRUE;
}
// If still not returned, the file was not found
return FALSE;
}
BOOL COXPathSpec::DoCopy(COXPathSpec destinationPath)
{
ASSERT(!GetFileName().IsEmpty()); // Source file must be specified
CString sSourcePath;
CString sDestPath;
if (destinationPath.GetFileName().IsEmpty())
// ... Make destination file name equal to source
destinationPath.SetFileName(GetFileName());
sSourcePath = GetPath();
sDestPath = destinationPath.GetPath();
#ifdef _DEBUG
if (!Exists())
{
TRACE(_T("COXPathSpec::DoCopy : Source file %s does not exist\n"), sSourcePath);
return FALSE;
}
else
if (destinationPath.Exists())
TRACE(_T("COXPathSpec::DoCopy : Destination file %s already exists, truncating ...\n"), sDestPath);
#endif
const int nBufferLength = 2048;
BYTE pBuffer[nBufferLength + 1];
int nLengthRead;
CFile source;
CFile dest;
MSG msg;
BOOL bSuccess = TRUE;
TRY
{
if ( (source.Open(sSourcePath,CFile::modeRead | CFile::shareCompat) != 0) &&
(dest.Open(sDestPath, CFile::modeCreate | CFile::modeWrite | CFile::shareExclusive) != 0) )
{
do
{
if (PeekMessage(&msg, NULL, NULL, NULL, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
nLengthRead = source.Read(pBuffer, nBufferLength);
dest.Write(pBuffer, nLengthRead);
}
while (nLengthRead == nBufferLength); // So while not EOF
source.Close();
dest.Close();
}
else
{
TRACE(_T("COXPathSpec::DoCopy : Could not open files\n"));
bSuccess = FALSE;
}
}
CATCH(CFileException, pxFile)
{
TRACE(_T("COXPathSpec::DoCopy : Catching FileException (%XH)\n"), pxFile->m_cause);
source.Close();
dest.Close();
destinationPath.DoRemove();
bSuccess = FALSE;
}
END_CATCH
// copy original time/date of creation and file attributes
DoGetInfo();
destinationPath.SetTime(GetTime());
destinationPath.DoSetTime();
destinationPath.SetAttributes((CFile::Attribute)GetAttributes());
destinationPath.DoSetAttributes();
return bSuccess;
}
BOOL COXPathSpec::DoMove(COXPathSpec destinationPath) const
{
if (destinationPath.GetDrive() == _T(""))
VERIFY(destinationPath.SetDrive(GetDrive()));
if (destinationPath.GetSubdirectory() == _T(""))
VERIFY(destinationPath.SetSubdirectory(GetSubdirectory()));
if (destinationPath.GetFileName() == _T(""))
VERIFY(destinationPath.SetFileName(GetFileName()));
if (*this == destinationPath)
{
TRACE(_T("COXPathSpec::DoMove : Source and destination files are the same %s\n"),
(LPCTSTR)GetPath());
// ... Nothing to do
return TRUE;
}
#ifdef _DEBUG
if (!Exists())
TRACE(_T("COXPathSpec::DoMove : Source file %s does not exist\n"),
(LPCTSTR)GetPath());
if (destinationPath.Exists())
TRACE(_T("COXPathSpec::DoMove : Destination file %s does not exist\n"),
(LPCTSTR)destinationPath.GetPath());
#endif
// ... Assume success
BOOL bSuccess = TRUE;
TRY
{
CFile::Rename(GetPath(), destinationPath.GetPath());
}
CATCH(CFileException, px)
{
TRACE(_T("COXPathSpec::DoMove : CFile::Rename(%s, %s) failed with CFileException cause %i\n"),
(LPCTSTR)GetPath(), (LPCTSTR)destinationPath.GetPath(), px->m_cause);
bSuccess = FALSE;
}
END_CATCH
return bSuccess;
}
BOOL COXPathSpec::DoRemove(BOOL bIgnoreReadOnly /* = FALSE */) const
{
CString sPath = GetPath();
// ... This function may only be used to remove a file,
// not a directory. So the file name must not be empty
ASSERT(!GetFileName().IsEmpty());
#ifdef _DEBUG
if (!Exists())
TRACE(_T("COXPathSpec::DoRemove : File %s does not exist\n"), sPath);
#endif
if (bIgnoreReadOnly)
#ifdef WIN32
if (!SetFileAttributes(sPath, CFile::normal))
#else
if(_dos_setfileattr(sPath, CFile::normal))
#endif
{
TRACE(_T("COXPathSpec::DoRemove : File not found or cannot remove R/O attribute of %s\n"), sPath);
return FALSE;
}
if (_tremove(sPath))
{
TRACE(_T("COXPathSpec::DoRemove : Cannot remove file %s\n"), sPath);
return FALSE;
}
return TRUE;
}
BOOL COXPathSpec::DoGetInfo()
{
CFileStatus fileStatus;
if (CFile::GetStatus(GetPath(), fileStatus))
{
m_time = fileStatus.m_mtime;
m_lnLength = (LONG) fileStatus.m_size;
m_eAttributes = fileStatus.m_attribute;
return TRUE;
}
else
{
TRACE(_T("COXPathSpec::DoGetInfo : Could not get file status of %s\n"),
GetPath());
return FALSE;
}
}
BOOL COXPathSpec::DoSetTime()
{
CFileStatus fileStatus;
if (!CFile::GetStatus(GetPath(), fileStatus))
{
TRACE(_T("COXPathSpec::DoSetTime : Could not even get the present status, failing\n"));
return FALSE;
}
// Set new time, (DOS only knows one type of time)
fileStatus.m_ctime = m_time;;
fileStatus.m_mtime = fileStatus.m_ctime;
fileStatus.m_atime = fileStatus.m_ctime;
BOOL bSuccess = TRUE;
TRY
{
CFile::SetStatus(GetPath(), fileStatus);
}
CATCH(CFileException, pxFile)
{
TRACE(_T("COXPathSpec::DoSetTime : Catching file exception (cause %XH)"),
((CFileException*)pxFile)->m_cause);
bSuccess = FALSE;
}
END_CATCH
return bSuccess;
}
BOOL COXPathSpec::DoSetLength()
{
// SetStatus does not set the file length, so we use direct dos access
#ifdef WIN32
HANDLE hFile;
hFile = CreateFile(GetPath(), GENERIC_READ | GENERIC_WRITE,
0,NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);
if (hFile == INVALID_HANDLE_VALUE)
{
TRACE(_T("COXPathSpec::DoSetLength : Could not open file %s, failing\n"),
(LPCTSTR)GetPath());
return FALSE;
}
SetFilePointer(hFile,m_lnLength, NULL,FILE_BEGIN);
if(GetLastError() != ERROR_SUCCESS)
{
TRACE(_T("COXPathSpec::DoSetLength : Could set new length of %s, failing\n"),
(LPCTSTR)GetPath());
return FALSE;
}
SetEndOfFile(hFile);
if(GetLastError() != ERROR_SUCCESS)
{
TRACE(_T("COXPathSpec::DoSetLength : Could not set end of %s, failing\n"),
(LPCTSTR)GetPath());
return FALSE;
}
if (!CloseHandle(hFile))
{
TRACE(_T("COXPathSpec::DoSetLength : Could not close file %s, failing\n"),
(LPCTSTR)GetPath());
return FALSE;
}
#else
UINT nErr;
int handle;
if ((nErr = _dos_open(GetPath(), CFile::modeReadWrite, &handle)) != 0)
{
TRACE(_T("COXPathSpec::DoSetLength : Could not open file %s, failing\n"),
(LPCTSTR)GetPath());
return FALSE;
}
if ((nErr = _chsize(handle, m_lnLength)) != 0)
{
TRACE(_T("COXPathSpec::DoSetLength : Could set new length of %s, failing\n"),
(LPCTSTR)GetPath());
return FALSE;
}
if ((nErr = _dos_close(handle)) != 0)
{
TRACE(_T("COXPathSpec::DoSetLength : Could not close file %s, failing\n"),
(LPCTSTR)GetPath());
return FALSE;
}
#endif
return TRUE;
}
BOOL COXPathSpec::DoSetAttributes()
{
CFileStatus fileStatus;
if (!CFile::GetStatus(GetPath(), fileStatus))
{
TRACE(_T("COXPathSpec::DoSetAttributes : Could not even get the present status, failing\n"));
return FALSE;
}
// Set new attributes
fileStatus.m_attribute = m_eAttributes;;
BOOL bSuccess = TRUE;
TRY
{
CFile::SetStatus(GetPath(), fileStatus);
}
CATCH(CFileException, pxFile)
{
TRACE(_T("COXPathSpec::DoSetAttributes : Catching file exception (cause %XH)"),
((CFileException*)pxFile)->m_cause);
bSuccess = FALSE;
}
END_CATCH
return bSuccess;
}
void COXPathSpec::Serialize(CArchive& archive)
{
COXDirSpec::Serialize(archive);
COXFileSpec::Serialize(archive);
}
// To avoid conflict between '#define new DEBUG_NEW' and 'operator new'
#undef new
#ifndef _DEBUG
void* COXPathSpec::operator new(size_t nSize)
{
return COXDirSpec::operator new(nSize);
}
#else
void* COXPathSpec::operator new(size_t nSize, LPCSTR lpszFileName, int nLine)
{
return COXDirSpec::operator new(nSize, lpszFileName, nLine);
}
#endif
void COXPathSpec::operator delete(void* p)
{
COXDirSpec::operator delete(p);
}
BOOL COXPathSpec::operator==(const COXPathSpec& pathSpec) const
{
return COXDirSpec::operator==(pathSpec) &&
COXFileSpec::operator==(pathSpec);
}
BOOL COXPathSpec::operator!=(const COXPathSpec& pathSpec) const
{
return COXDirSpec::operator!=(pathSpec) ||
COXFileSpec::operator!=(pathSpec);
}
BOOL COXPathSpec::operator<=(const COXPathSpec& pathSpec) const
{
return COXDirSpec::operator<=(pathSpec) &&
COXFileSpec::operator<=(pathSpec);
}
BOOL COXPathSpec::operator<(const COXPathSpec& pathSpec) const
{
return COXDirSpec::operator<(pathSpec) &&
COXFileSpec::operator<(pathSpec);
}
BOOL COXPathSpec::operator>=(const COXPathSpec& pathSpec) const
{
return COXDirSpec::operator>=(pathSpec) &&
COXFileSpec::operator>=(pathSpec);
}
BOOL COXPathSpec::operator>(const COXPathSpec& pathSpec) const
{
return COXDirSpec::operator>(pathSpec) &&
COXFileSpec::operator>(pathSpec);
}
#ifdef _DEBUG
void COXPathSpec::Dump(CDumpContext& dc) const
{
COXDirSpec::Dump(dc);
COXFileSpec::Dump(dc);
}
void COXPathSpec::AssertValid() const
{
COXDirSpec::AssertValid();
COXFileSpec::AssertValid();
}
#endif
COXPathSpec::~COXPathSpec()
{
}
// protected:
HMODULE COXPathSpec::GetThisModule()
// --- In :
// --- Out :
// --- Returns : The module handle of the running task
// --- Effect :
{
HMODULE hThisModule = NULL;
#ifdef WIN32
hThisModule = GetModuleHandle(NULL);
#else
// WIN16 does not have a direct function which returns the module handle of the running application
// Therefor TOOLHELP is used to calculate it from the running task
HTASK hCurrentTask;
TASKENTRY taskEntry;
taskEntry.dwSize = sizeof(taskEntry);
hCurrentTask = GetCurrentTask();
if (hCurrentTask == NULL)
return NULL;
TaskFindHandle(&taskEntry, hCurrentTask);
hThisModule = taskEntry.hModule;
// An alternative (but undocumented) ways is the following
// HMODULE hThisModule2 = (HMODULE)*(LPWORD)MAKELP(GetCurrentTask(), 0x1E);
#endif
return hThisModule;
}
BOOL COXPathSpec::SearchEnvironment(LPCTSTR pszFileName, LPCTSTR pszVarName, LPTSTR pszPathName)
// --- In : pszFileName : The name of the file to search for
// pszVarName : The name of the environment variable
// --- Out : pszPathName : The full path of the file if found, otherwise empty
// --- Returns : Whether the specified file was found
// --- Effect : Searches all the directories of the specified environment variable
// for the specified file
// An environment variable is case-sensitive
// --- Remark : This function is an implementation of the C-RunTime function _searchenv
// This function also works when called from a DLL, which _searchenv does not
{
const int nMaxEntriesLength(300);
TCHAR szEntries[nMaxEntriesLength + 1];
LPTSTR pszToken;
DWORD dwEntriesLength;
// ... Assume failure, so initialize out-parameter
ASSERT(pszPathName != NULL);
ASSERT(AfxIsValidAddress(pszPathName, 1));
*pszPathName = _T('\0');
// ... First get the environment value
dwEntriesLength = GetEnvironmentVar(pszVarName, szEntries, nMaxEntriesLength);
if (dwEntriesLength == 0)
// ... Failure : Environment variable does not exist
return FALSE;
#ifdef _DEBUG
if (nMaxEntriesLength < dwEntriesLength)
TRACE(_T("COXPathSpec::SearchEnv : Environment variable value length (%u) exceeds maximum length (%u) and will be truncated\n"),
dwEntriesLength, nMaxEntriesLength);
#endif
// Iterate all the directory entries, which are seperated by a semi-colon
BOOL bFound = FALSE;
CFileStatus fileStatus;
TCHAR szPath[_MAX_PATH];
LPTSTR pszConcat;
TCHAR * nextToken;
pszToken = UTBStr::tcstok(szEntries, _T(";"), &nextToken);
while (!bFound && (pszToken != NULL))
{
UTBStr::tcscpy(szPath, _MAX_PATH, pszToken);
// ... String cannot be empty because (pszToken != '\0')
ASSERT(1 <= _tcsclen(szPath));
// ... Examine the last char of the directory spec,
// if it is not back slash and not a colon (relative path), add a back slash
pszConcat = &szPath[_tcsclen(szPath) - 1];
if ( (*pszConcat != _T('\\')) && (*pszConcat != _T(':')) )
*(++pszConcat) = _T('\\');
// ... Position after last char of directory spec
pszConcat++;
// ... Add file name
UTBStr::tcscpy(pszConcat, _tcsclen(szPath) - 1, pszFileName);
bFound = CFile::GetStatus(szPath, fileStatus);
TCHAR * nextToken;
pszToken = UTBStr::tcstok(NULL, _T(";"), &nextToken);
}
if (bFound)
{
ASSERT(AfxIsValidAddress(pszPathName, _tcsclen(szPath) + 1));
UTBStr::tcscpy(pszPathName, _MAX_PATH, szPath);
}
return bFound;
}
DWORD COXPathSpec::GetEnvironmentVar(LPCTSTR pszVarName, LPTSTR pszValue, DWORD nLength)
// --- In : pszVarName : The name of the environment variable
// pszValue : Buffer into which the result will be stored
// nLength : The length of the buffer
// --- Out : pszValue : The result (the environment table entry containing
// the current string value of pszVarName)
// --- Returns : The number of characters stored into the buffer pointed to by pszValue,
// not including the terminating null character.
// When the variable name was not found the return value is zero.
// If the buffer pointed to by pszValue is not large enough,
// the return value is the buffer size, in characters,
// required to hold the value string and its terminating null character.
// --- Effect : Searches the list of environment variables for the specified entry
// An environment variable is case-sensitive
// --- Remark : This function is an implementation of the C-RunTime function getenv
// This function also works when called from a DLL, which in WIN16 getenv does not
// See Also MS Developers Network Q78542 :
// Retreiving MS-DOS Environment Vars from a Windows DLL
{
#ifdef WIN32
// Functionality exists in WIN32, so just call Windows API function
return ::GetEnvironmentVariable(pszVarName, pszValue, nLength);
#else
// ... Assume failure, so initialize out-parameter
ASSERT(pszValue != NULL);
ASSERT(AfxIsValidAddress(pszValue, (UINT)nLength));
*pszValue = _T('\0');
LPTSTR lpEnvSearch;
LPCTSTR lpszVarSearch;
// ... Check for empty var
if (*pszVarName == _T('\0'))
{
TRACE(_T("COXPathSpec::GetEnvironmentVar : Empty environment variable, returning 0\n"));
return 0;
}
// ... Get a pointer to the MS-DOS environment block
lpEnvSearch = GetDOSEnvironment();
// ... Iterat all strings in the environment table
while (*lpEnvSearch != _T('\0'))
{
// ... Check to see if the variable names match
lpszVarSearch = pszVarName;
while ( (*lpEnvSearch != _T('\0')) && (*lpszVarSearch != _T('\0')) &&
(*lpEnvSearch == *lpszVarSearch) )
{
lpEnvSearch++;
lpszVarSearch++;
}
// ... If the names match, the lpEnvSearch pointer is on the "="
// character and lpszVarSearch is on a null terminator.
// Increment and return lpszEnvSearch, which will point to the
// environment variable's contents.
if ((*lpEnvSearch == _T('=')) && (*lpszVarSearch == _T('\0')))
{
lpEnvSearch++;
strncpy(pszValue, lpEnvSearch, (size_t)nLength);
pszValue[nLength] = _T('\0');
return _tcsclen(lpEnvSearch);
}
// ... If the names do not match, increment lpEnvSearch until it
// reaches the end of the current variable string.
else
while (*lpEnvSearch != _T('\0'))
lpEnvSearch++;
// ... At this point the end of the environment variable's string
// has been reached. Increment lpEnvSearch to move to the
// next variable in the environment block. If it is NULL,
// the end of the environment block has been reached.
lpEnvSearch++;
}
// If this section of code is reached, the variable was not found.
TRACE(_T("COXPathSpec::GetEnvironmentVar : Environment variable (%s) not found, returning NULL\n"), pszVarName);
return 0;
#endif // WIN32
}
BOOL COXPathSpec::GetFirstFile(COXPathIterator& FIterator) const
{
COXPathSpec searchPath(*this);
if (searchPath.GetFileName().IsEmpty())
VERIFY(searchPath.SetFileName(_T("*.*")));
BOOL bGoodFileFound = FALSE;
BOOL bJustFileFound = TRUE;
FIterator.m_bValid = TRUE;
#ifdef WIN32
FIterator.m_hFindFile = FindFirstFile(searchPath.GetPath(), &FIterator.m_FindFileData);
if (FIterator.m_hFindFile == INVALID_HANDLE_VALUE)
{
FindClose(FIterator.m_hFindFile);
FIterator.m_hFindFile = NULL;
FIterator.m_bValid = FALSE;
}
else
{
while (!bGoodFileFound && bJustFileFound)
{
if (!IsChildDir(&FIterator.m_FindFileData) &&
(FIterator.m_FindFileData.cFileName[0] != _T('.')))
bGoodFileFound = TRUE;
if (!bGoodFileFound)
bJustFileFound = FindNextFile(FIterator.m_hFindFile, &FIterator.m_FindFileData);
}
}
#else
bGoodFileFound = !_dos_findfirst(searchPath.GetPath(), _A_NORMAL | _A_ARCH, &FIterator.m_FileInfo);
#endif
FIterator.m_bValid = bGoodFileFound;
return FIterator.m_bValid;
}
COXFileSpec COXPathSpec::GetNextFile(COXPathIterator& FIterator) const
{
ASSERT_VALID(&FIterator);
COXFileSpec ActualFile;
BOOL bDirFound(TRUE);
#ifdef WIN32
BOOL bFileFound;
ActualFile.SetFileName(FIterator.m_FindFileData.cFileName);
ActualFile.SetTime(CTime(FIterator.m_FindFileData.ftLastWriteTime));
ASSERT(FIterator.m_FindFileData.nFileSizeHigh == 0);
ActualFile.SetLength(FIterator.m_FindFileData.nFileSizeLow);
ActualFile.SetAttributes((CFile::Attribute)FIterator.m_FindFileData.dwFileAttributes);
bFileFound = FindNextFile(FIterator.m_hFindFile, &FIterator.m_FindFileData);
while (bFileFound && bDirFound)
{
if (!IsChildDir(&FIterator.m_FindFileData) &&
(FIterator.m_FindFileData.cFileName[0] != _T('.')))
bDirFound = FALSE;
if (bDirFound)
bFileFound = FindNextFile(FIterator.m_hFindFile, &FIterator.m_FindFileData);
}
if (!bFileFound)
{
FindClose(FIterator.m_hFindFile);
FIterator.m_hFindFile = NULL;
FIterator.m_bValid = FALSE;
}
#else
ActualFile.SetFileName(FIterator.m_FileInfo.name);
ActualFile.SetTime(CTime((WORD)FIterator.m_FileInfo.wr_date, (WORD)FIterator.m_FileInfo.wr_time));
ActualFile.SetLength(FIterator.m_FileInfo.size);
ActualFile.SetAttributes((CFile::Attribute)FIterator.m_FileInfo.attrib);
if (_dos_findnext(&FIterator.m_FileInfo) != 0)
{
FIterator.m_bValid = FALSE;
}
#endif
return ActualFile;
}
BOOL COXPathSpec::GetFirstDir(COXPathIterator& FIterator) const
{
COXPathSpec searchPath(*this);
if (searchPath.GetFileName().IsEmpty())
VERIFY(searchPath.SetFileName(_T("*.*")));
FIterator.m_bValid = TRUE;
BOOL bFileFound(TRUE);
BOOL bDirFound(FALSE);
#ifdef WIN32
FIterator.m_hFindFile = FindFirstFile(searchPath.GetPath(), &FIterator.m_FindFileData);
if (FIterator.m_hFindFile == INVALID_HANDLE_VALUE)
{
FindClose(FIterator.m_hFindFile);
FIterator.m_hFindFile = NULL;
FIterator.m_bValid = FALSE;
}
else
{
while (!bDirFound && bFileFound)
{
if (IsChildDir(&FIterator.m_FindFileData))
bDirFound = TRUE;
if (!bDirFound)
bFileFound = FindNextFile(FIterator.m_hFindFile, &FIterator.m_FindFileData);
}
}
#else
bFileFound = !_dos_findfirst(searchPath.GetPath(), _A_NORMAL | _A_ARCH | _A_SUBDIR, &FIterator.m_FileInfo);
while (bFileFound && !bDirFound)
{
if (((FIterator.m_FileInfo.attrib & _A_SUBDIR) == _A_SUBDIR) && (strcmp(FIterator.m_FileInfo.name, _T(".")) != 0) &&
(strcmp(FIterator.m_FileInfo.name, _T("..")) != 0))
bDirFound = TRUE;
if (!bDirFound)
bFileFound = (_dos_findnext(&FIterator.m_FileInfo) == 0);
}
#endif
FIterator.m_bValid = bDirFound;
return FIterator.m_bValid;
}
COXDirSpec COXPathSpec::GetNextDir(COXPathIterator& FIterator) const
{
ASSERT_VALID(&FIterator);
COXDirSpec ActualDir;
BOOL bFileFound;
BOOL bDirFound(FALSE);
#ifdef WIN32
ActualDir.SetDrive(m_sDrive);
ActualDir.SetSubdirectory(m_sSubdirectory);
ActualDir.AppendDirectory(COXDirSpec(FIterator.m_FindFileData.cFileName));
bFileFound = FindNextFile(FIterator.m_hFindFile, &FIterator.m_FindFileData);
while (bFileFound && !bDirFound)
{
if (IsChildDir(&FIterator.m_FindFileData))
bDirFound = TRUE;
if (!bDirFound)
bFileFound = FindNextFile(FIterator.m_hFindFile, &FIterator.m_FindFileData);
}
if (!bFileFound)
{
FindClose(FIterator.m_hFindFile);
FIterator.m_hFindFile = NULL;
FIterator.m_bValid = FALSE;
}
#else
ActualDir.SetDrive(m_sDrive);
ActualDir.SetSubdirectory(m_sSubdirectory);
ActualDir.AppendDirectory(COXDirSpec(FIterator.m_FileInfo.name));
bFileFound = !_dos_findnext(&FIterator.m_FileInfo);
while (bFileFound && !bDirFound)
{
if (((FIterator.m_FileInfo.attrib & _A_SUBDIR) == _A_SUBDIR) && (strcmp(FIterator.m_FileInfo.name, _T(".")) != 0) &&
(strcmp(FIterator.m_FileInfo.name, _T("..")) != 0))
bDirFound = TRUE;
if (!bDirFound)
bFileFound = (_dos_findnext(&FIterator.m_FileInfo) == 0);
}
FIterator.m_bValid = bDirFound;
#endif
return ActualDir;
}
// private:
// ==========================================================================
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