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gecko-dev/xpcom/io/nsFileSpecWin.cpp
dougt%netscape.com d8011b81b2 Optimization for shortcut resolution. r=dveditz.
2000-02-15 21:28:13 +00:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
// This file is included by nsFileSpec.cp, and includes the Windows-specific
// implementations.
#include <sys/stat.h>
#include <direct.h>
#include <limits.h>
#include <stdlib.h>
#include "prio.h"
#include "nsError.h"
#include "windows.h"
#if (_MSC_VER == 1100)
#define INITGUID
#include "objbase.h"
DEFINE_OLEGUID(IID_IPersistFile, 0x0000010BL, 0, 0);
#endif
#include "shlobj.h"
#include "shellapi.h"
#include "shlguid.h"
#ifdef UNICODE
#define CreateDirectoryW CreateDirectory
#else
#define CreateDirectoryA CreateDirectory
#endif
//----------------------------------------------------------------------------------------
void nsFileSpecHelpers::Canonify(nsSimpleCharString& ioPath, PRBool inMakeDirs)
// Canonify, make absolute, and check whether directories exist. This
// takes a (possibly relative) native path and converts it into a
// fully qualified native path.
//----------------------------------------------------------------------------------------
{
if (ioPath.IsEmpty())
return;
NS_ASSERTION(strchr((const char*)ioPath, '/') == 0,
"This smells like a Unix path. Native path expected! "
"Please fix.");
if (inMakeDirs)
{
const int mode = 0700;
nsSimpleCharString unixStylePath = ioPath;
nsFileSpecHelpers::NativeToUnix(unixStylePath);
nsFileSpecHelpers::MakeAllDirectories((const char*)unixStylePath, mode);
}
char buffer[_MAX_PATH];
errno = 0;
*buffer = '\0';
char* canonicalPath = _fullpath(buffer, ioPath, _MAX_PATH);
if (canonicalPath)
{
NS_ASSERTION( canonicalPath[0] != '\0', "Uh oh...couldn't convert" );
if (canonicalPath[0] == '\0')
return;
}
ioPath = canonicalPath;
} // nsFileSpecHelpers::Canonify
//----------------------------------------------------------------------------------------
void nsFileSpecHelpers::UnixToNative(nsSimpleCharString& ioPath)
// This just does string manipulation. It doesn't check reality, or canonify, or
// anything
//----------------------------------------------------------------------------------------
{
// Allow for relative or absolute. We can do this in place, because the
// native path is never longer.
if (ioPath.IsEmpty())
return;
// Strip initial slash for an absolute path
char* src = (char*)ioPath;
if (*src == '/')
{
// Since it was an absolute path, check for the drive letter
char* colonPointer = src + 2;
if (strstr(src, "|/") == colonPointer)
*colonPointer = ':';
// allocate new string by copying from ioPath[1]
nsSimpleCharString temp = src + 1;
ioPath = temp;
}
src = (char*)ioPath;
if (*src) {
// Convert '/' to '\'.
while (*++src)
{
if (*src == '/')
*src = '\\';
}
}
} // nsFileSpecHelpers::UnixToNative
//----------------------------------------------------------------------------------------
void nsFileSpecHelpers::NativeToUnix(nsSimpleCharString& ioPath)
// This just does string manipulation. It doesn't check reality, or canonify, or
// anything. The unix path is longer, so we can't do it in place.
//----------------------------------------------------------------------------------------
{
if (ioPath.IsEmpty())
return;
// Convert the drive-letter separator, if present
nsSimpleCharString temp("/");
char* cp = (char*)ioPath + 1;
if (strstr(cp, ":\\") == cp)
*cp = '|'; // absolute path
else
temp[0] = '\0'; // relative path
// Convert '\' to '/'
for (; *cp; cp++)
{
if (*cp == '\\')
*cp = '/';
}
// Add the slash in front.
temp += ioPath;
ioPath = temp;
}
//----------------------------------------------------------------------------------------
nsFileSpec::nsFileSpec(const nsFilePath& inPath)
//----------------------------------------------------------------------------------------
{
*this = inPath;
}
//----------------------------------------------------------------------------------------
void nsFileSpec::operator = (const nsFilePath& inPath)
//----------------------------------------------------------------------------------------
{
mPath = (const char*)inPath;
nsFileSpecHelpers::UnixToNative(mPath);
mError = NS_OK;
} // nsFileSpec::operator =
//----------------------------------------------------------------------------------------
nsFilePath::nsFilePath(const nsFileSpec& inSpec)
//----------------------------------------------------------------------------------------
{
*this = inSpec;
} // nsFilePath::nsFilePath
//----------------------------------------------------------------------------------------
void nsFilePath::operator = (const nsFileSpec& inSpec)
//----------------------------------------------------------------------------------------
{
mPath = inSpec.mPath;
nsFileSpecHelpers::NativeToUnix(mPath);
} // nsFilePath::operator =
//----------------------------------------------------------------------------------------
void nsFileSpec::SetLeafName(const char* inLeafName)
//----------------------------------------------------------------------------------------
{
NS_ASSERTION(inLeafName, "Attempt to SetLeafName with a null string");
mPath.LeafReplace('\\', inLeafName);
} // nsFileSpec::SetLeafName
//----------------------------------------------------------------------------------------
char* nsFileSpec::GetLeafName() const
//----------------------------------------------------------------------------------------
{
return mPath.GetLeaf('\\');
} // nsFileSpec::GetLeafName
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::Exists() const
//----------------------------------------------------------------------------------------
{
struct stat st;
return !mPath.IsEmpty() && 0 == stat(nsNSPRPath(*this), &st);
} // nsFileSpec::Exists
//----------------------------------------------------------------------------------------
void nsFileSpec::GetModDate(TimeStamp& outStamp) const
//----------------------------------------------------------------------------------------
{
struct stat st;
if (!mPath.IsEmpty() && stat(nsNSPRPath(*this), &st) == 0)
outStamp = st.st_mtime;
else
outStamp = 0;
} // nsFileSpec::GetModDate
//----------------------------------------------------------------------------------------
PRUint32 nsFileSpec::GetFileSize() const
//----------------------------------------------------------------------------------------
{
struct stat st;
if (!mPath.IsEmpty() && stat(nsNSPRPath(*this), &st) == 0)
return (PRUint32)st.st_size;
return 0;
} // nsFileSpec::GetFileSize
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsFile() const
//----------------------------------------------------------------------------------------
{
struct stat st;
return !mPath.IsEmpty() && 0 == stat(nsNSPRPath(*this), &st) && (_S_IFREG & st.st_mode);
} // nsFileSpec::IsFile
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsDirectory() const
//----------------------------------------------------------------------------------------
{
struct stat st;
return !mPath.IsEmpty() && 0 == stat(nsNSPRPath(*this), &st) && (_S_IFDIR & st.st_mode);
} // nsFileSpec::IsDirectory
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsHidden() const
//----------------------------------------------------------------------------------------
{
PRBool hidden = PR_FALSE;
if (!mPath.IsEmpty())
{
DWORD attr = GetFileAttributes(mPath);
if (FILE_ATTRIBUTE_HIDDEN & attr)
hidden = PR_TRUE;
}
return hidden;
}
// nsFileSpec::IsHidden
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsSymlink() const
//----------------------------------------------------------------------------------------
{
HRESULT hres;
IShellLink* psl;
PRBool isSymlink = PR_FALSE;
CoInitialize(NULL);
// Get a pointer to the IShellLink interface.
hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, IID_IShellLink, (void**)&psl);
if (SUCCEEDED(hres))
{
IPersistFile* ppf;
// Get a pointer to the IPersistFile interface.
hres = psl->QueryInterface(IID_IPersistFile, (void**)&ppf);
if (SUCCEEDED(hres))
{
WORD wsz[MAX_PATH];
// Ensure that the string is Unicode.
MultiByteToWideChar(CP_ACP, 0, mPath, -1, wsz, MAX_PATH);
// Load the shortcut.
hres = ppf->Load(wsz, STGM_READ);
if (SUCCEEDED(hres))
{
isSymlink = PR_TRUE;
}
// Release the pointer to the IPersistFile interface.
ppf->Release();
}
// Release the pointer to the IShellLink interface.
psl->Release();
}
CoUninitialize();
return isSymlink;
}
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::ResolveSymlink(PRBool& wasSymlink)
//----------------------------------------------------------------------------------------
{
wasSymlink = PR_FALSE; // assume failure
if (Exists())
return NS_OK;
HRESULT hres;
IShellLink* psl;
CoInitialize(NULL);
// Get a pointer to the IShellLink interface.
hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, IID_IShellLink, (void**)&psl);
if (SUCCEEDED(hres))
{
IPersistFile* ppf;
// Get a pointer to the IPersistFile interface.
hres = psl->QueryInterface(IID_IPersistFile, (void**)&ppf);
if (SUCCEEDED(hres))
{
WORD wsz[MAX_PATH];
// Ensure that the string is Unicode.
MultiByteToWideChar(CP_ACP, 0, mPath, -1, wsz, MAX_PATH);
// Load the shortcut.
hres = ppf->Load(wsz, STGM_READ);
if (SUCCEEDED(hres))
{
wasSymlink = PR_TRUE;
// Resolve the link.
hres = psl->Resolve(nsnull, SLR_NO_UI );
if (SUCCEEDED(hres))
{
char szGotPath[MAX_PATH];
WIN32_FIND_DATA wfd;
// Get the path to the link target.
hres = psl->GetPath( szGotPath, MAX_PATH, &wfd, SLGP_UNCPRIORITY );
if (SUCCEEDED(hres))
{
// Here we modify the nsFileSpec;
mPath = szGotPath;
mError = NS_OK;
}
}
}
else {
// It wasn't a shortcut. Oh well. Leave it like it was.
hres = 0;
}
// Release the pointer to the IPersistFile interface.
ppf->Release();
}
// Release the pointer to the IShellLink interface.
psl->Release();
}
CoUninitialize();
if (SUCCEEDED(hres))
return NS_OK;
return NS_FILE_FAILURE;
}
//----------------------------------------------------------------------------------------
void nsFileSpec::GetParent(nsFileSpec& outSpec) const
//----------------------------------------------------------------------------------------
{
outSpec.mPath = mPath;
char* chars = (char*)outSpec.mPath;
chars[outSpec.mPath.Length() - 1] = '\0'; // avoid trailing separator, if any
char* cp = strrchr(chars, '\\');
if (cp++)
outSpec.mPath.SetLength(cp - chars); // truncate.
} // nsFileSpec::GetParent
//----------------------------------------------------------------------------------------
void nsFileSpec::operator += (const char* inRelativePath)
//----------------------------------------------------------------------------------------
{
NS_ASSERTION(inRelativePath, "Attempt to do += with a null string");
if (!inRelativePath || mPath.IsEmpty())
return;
if (mPath[mPath.Length() - 1] == '\\')
mPath += "x";
else
mPath += "\\x";
// If it's a (unix) relative path, make it native
nsSimpleCharString dosPath = inRelativePath;
nsFileSpecHelpers::UnixToNative(dosPath);
SetLeafName(dosPath);
} // nsFileSpec::operator +=
//----------------------------------------------------------------------------------------
void nsFileSpec::CreateDirectory(int /*mode*/)
//----------------------------------------------------------------------------------------
{
// Note that mPath is canonical!
if (!mPath.IsEmpty())
mkdir(nsNSPRPath(*this));
} // nsFileSpec::CreateDirectory
//----------------------------------------------------------------------------------------
void nsFileSpec::Delete(PRBool inRecursive) const
//----------------------------------------------------------------------------------------
{
if (IsDirectory())
{
if (inRecursive)
{
for (nsDirectoryIterator i(*this, PR_FALSE); i.Exists(); i++)
{
nsFileSpec& child = (nsFileSpec&)i;
child.Delete(inRecursive);
}
}
rmdir(nsNSPRPath(*this));
}
else if (!mPath.IsEmpty())
{
remove(nsNSPRPath(*this));
}
} // nsFileSpec::Delete
//----------------------------------------------------------------------------------------
void nsFileSpec::RecursiveCopy(nsFileSpec newDir) const
//----------------------------------------------------------------------------------------
{
if (IsDirectory())
{
if (!(newDir.Exists()))
{
newDir.CreateDirectory();
}
for (nsDirectoryIterator i(*this, PR_FALSE); i.Exists(); i++)
{
nsFileSpec& child = (nsFileSpec&)i;
if (child.IsDirectory())
{
nsFileSpec tmpDirSpec(newDir);
char *leafname = child.GetLeafName();
tmpDirSpec += leafname;
nsCRT::free(leafname);
child.RecursiveCopy(tmpDirSpec);
}
else
{
child.RecursiveCopy(newDir);
}
}
}
else if (!mPath.IsEmpty())
{
nsFileSpec& filePath = (nsFileSpec&) *this;
if (!(newDir.Exists()))
{
newDir.CreateDirectory();
}
filePath.CopyToDir(newDir);
}
} // nsFileSpec::RecursiveCopy
//----------------------------------------------------------------------------------------
nsresult
nsFileSpec::Truncate(PRInt32 aNewFileLength) const
//----------------------------------------------------------------------------------------
{
DWORD status;
HANDLE hFile;
// Leave it to Microsoft to open an existing file with a function
// named "CreateFile".
hFile = CreateFile(mPath,
GENERIC_WRITE,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (hFile == INVALID_HANDLE_VALUE)
return NS_FILE_FAILURE;
// Seek to new, desired end of file
status = SetFilePointer(hFile, aNewFileLength, NULL, FILE_BEGIN);
if (status == 0xffffffff)
goto error;
// Truncate file at current cursor position
if (!SetEndOfFile(hFile))
goto error;
if (!CloseHandle(hFile))
return NS_FILE_FAILURE;
return NS_OK;
error:
CloseHandle(hFile);
return NS_FILE_FAILURE;
} // nsFileSpec::Truncate
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::Rename(const char* inNewName)
//----------------------------------------------------------------------------------------
{
NS_ASSERTION(inNewName, "Attempt to Rename with a null string");
// This function should not be used to move a file on disk.
if (strchr(inNewName, '/'))
return NS_FILE_FAILURE;
char* oldPath = nsCRT::strdup(mPath);
SetLeafName(inNewName);
if (PR_Rename(oldPath, mPath) != NS_OK)
{
// Could not rename, set back to the original.
mPath = oldPath;
return NS_FILE_FAILURE;
}
nsCRT::free(oldPath);
return NS_OK;
} // nsFileSpec::Rename
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::CopyToDir(const nsFileSpec& inParentDirectory) const
//----------------------------------------------------------------------------------------
{
// We can only copy into a directory, and (for now) can not copy entire directories
if (inParentDirectory.IsDirectory() && (! IsDirectory() ) )
{
char *leafname = GetLeafName();
nsSimpleCharString destPath(inParentDirectory.GetCString());
destPath += "\\";
destPath += leafname;
nsCRT::free(leafname);
// CopyFile returns non-zero if succeeds
int copyOK = CopyFile(GetCString(), destPath, PR_TRUE);
if (copyOK)
return NS_OK;
}
return NS_FILE_FAILURE;
} // nsFileSpec::CopyToDir
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::MoveToDir(const nsFileSpec& inNewParentDirectory)
//----------------------------------------------------------------------------------------
{
// We can only copy into a directory, and (for now) can not copy entire directories
if (inNewParentDirectory.IsDirectory() && (! IsDirectory() ) )
{
char *leafname = GetLeafName();
nsSimpleCharString destPath(inNewParentDirectory.GetCString());
destPath += "\\";
destPath += leafname;
nsCRT::free(leafname);
// MoveFile returns non-zero if succeeds
int copyOK = MoveFile(GetCString(), destPath);
if (copyOK)
{
*this = inNewParentDirectory + GetLeafName();
return NS_OK;
}
}
return NS_FILE_FAILURE;
} // nsFileSpec::MoveToDir
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::Execute(const char* inArgs ) const
//----------------------------------------------------------------------------------------
{
if (!IsDirectory())
{
nsSimpleCharString fileNameWithArgs = "\"";
fileNameWithArgs += mPath + "\" " + inArgs;
int execResult = WinExec( fileNameWithArgs, SW_NORMAL );
if (execResult > 31)
return NS_OK;
}
return NS_FILE_FAILURE;
} // nsFileSpec::Execute
//----------------------------------------------------------------------------------------
PRInt64 nsFileSpec::GetDiskSpaceAvailable() const
//----------------------------------------------------------------------------------------
{
PRInt64 int64;
LL_I2L(int64 , LONG_MAX);
char aDrive[_MAX_DRIVE + 2];
_splitpath( (const char*)mPath, aDrive, NULL, NULL, NULL);
if (aDrive[0] == '\0')
{
// The back end is always trying to pass us paths that look
// like /c|/netscape/mail. See if we've got one of them
if (mPath.Length() > 2 && mPath[0] == '/' && mPath[2] == '|')
{
aDrive[0] = mPath[1];
aDrive[1] = ':';
aDrive[2] = '\0';
}
else
{
// Return bogus large number and hope for the best
return int64;
}
}
strcat(aDrive, "\\");
// Check disk space
DWORD dwSecPerClus, dwBytesPerSec, dwFreeClus, dwTotalClus;
ULARGE_INTEGER liFreeBytesAvailableToCaller, liTotalNumberOfBytes, liTotalNumberOfFreeBytes;
double nBytes = 0;
BOOL (WINAPI* getDiskFreeSpaceExA)(LPCTSTR lpDirectoryName,
PULARGE_INTEGER lpFreeBytesAvailableToCaller,
PULARGE_INTEGER lpTotalNumberOfBytes,
PULARGE_INTEGER lpTotalNumberOfFreeBytes) = NULL;
HINSTANCE hInst = LoadLibrary("KERNEL32.DLL");
NS_ASSERTION(hInst != NULL, "COULD NOT LOAD KERNEL32.DLL");
if (hInst != NULL)
{
getDiskFreeSpaceExA = (BOOL (WINAPI*)(LPCTSTR lpDirectoryName,
PULARGE_INTEGER lpFreeBytesAvailableToCaller,
PULARGE_INTEGER lpTotalNumberOfBytes,
PULARGE_INTEGER lpTotalNumberOfFreeBytes))
GetProcAddress(hInst, "GetDiskFreeSpaceExA");
FreeLibrary(hInst);
}
if (getDiskFreeSpaceExA && (*getDiskFreeSpaceExA)(aDrive,
&liFreeBytesAvailableToCaller,
&liTotalNumberOfBytes,
&liTotalNumberOfFreeBytes))
{
nBytes = (double)(signed __int64)liFreeBytesAvailableToCaller.QuadPart;
}
else if ( GetDiskFreeSpace(aDrive, &dwSecPerClus, &dwBytesPerSec, &dwFreeClus, &dwTotalClus))
{
nBytes = (double)dwFreeClus*(double)dwSecPerClus*(double) dwBytesPerSec;
}
return (PRInt64)nBytes;
}
//========================================================================================
// nsDirectoryIterator
//========================================================================================
//----------------------------------------------------------------------------------------
nsDirectoryIterator::nsDirectoryIterator(const nsFileSpec& inDirectory, PRBool resolveSymlink)
//----------------------------------------------------------------------------------------
: mCurrent(inDirectory)
, mDir(nsnull)
, mStarting(inDirectory)
, mExists(PR_FALSE)
, mResoveSymLinks(resolveSymlink)
{
mDir = PR_OpenDir(inDirectory);
mCurrent += "dummy";
mStarting += "dummy";
++(*this);
} // nsDirectoryIterator::nsDirectoryIterator
//----------------------------------------------------------------------------------------
nsDirectoryIterator::~nsDirectoryIterator()
//----------------------------------------------------------------------------------------
{
if (mDir)
PR_CloseDir(mDir);
} // nsDirectoryIterator::nsDirectoryIterator
//----------------------------------------------------------------------------------------
nsDirectoryIterator& nsDirectoryIterator::operator ++ ()
//----------------------------------------------------------------------------------------
{
mExists = PR_FALSE;
if (!mDir)
return *this;
PRDirEntry* entry = PR_ReadDir(mDir, PR_SKIP_BOTH); // Ignore '.' && '..'
if (entry)
{
mExists = PR_TRUE;
mCurrent = mStarting;
mCurrent.SetLeafName(entry->name);
if (mResoveSymLinks)
{
PRBool ignore;
mCurrent.ResolveSymlink(ignore);
}
}
return *this;
} // nsDirectoryIterator::operator ++
//----------------------------------------------------------------------------------------
nsDirectoryIterator& nsDirectoryIterator::operator -- ()
//----------------------------------------------------------------------------------------
{
return ++(*this); // can't do it backwards.
} // nsDirectoryIterator::operator --
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