зеркало из https://github.com/mozilla/pjs.git
326 строки
9.7 KiB
C++
326 строки
9.7 KiB
C++
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Doug Turner <dougt@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsIServiceManager.h"
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#include "nsLocalFile.h" // includes platform-specific headers
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#include "nsLocalFileUnicode.h"
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#include "nsString.h"
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#include "nsCOMPtr.h"
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#include "nsReadableUtils.h"
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#include "nsPrintfCString.h"
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#include "nsCRT.h"
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#include "nsNativeCharsetUtils.h"
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#include "nsUTF8Utils.h"
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#ifdef XP_WIN
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#include <string.h>
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#endif
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void NS_StartupLocalFile()
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{
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nsLocalFile::GlobalInit();
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}
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void NS_ShutdownLocalFile()
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{
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nsLocalFile::GlobalShutdown();
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}
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#if !defined(XP_MACOSX) && !defined(XP_WIN)
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NS_IMETHODIMP
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nsLocalFile::InitWithFile(nsILocalFile *aFile)
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{
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NS_ENSURE_ARG(aFile);
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nsCAutoString path;
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aFile->GetNativePath(path);
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if (path.IsEmpty())
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return NS_ERROR_INVALID_ARG;
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return InitWithNativePath(path);
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}
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#endif
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#define kMaxFilenameLength 255
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#define kMaxExtensionLength 100
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#define kMaxSequenceNumberLength 5 // "-9999"
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// requirement: kMaxExtensionLength < kMaxFilenameLength - kMaxSequenceNumberLength
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NS_IMETHODIMP
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nsLocalFile::CreateUnique(PRUint32 type, PRUint32 attributes)
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{
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nsresult rv;
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PRBool longName;
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#ifdef XP_WIN
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nsAutoString pathName, leafName, rootName, suffix;
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rv = GetPath(pathName);
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#else
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nsCAutoString pathName, leafName, rootName, suffix;
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rv = GetNativePath(pathName);
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#endif
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if (NS_FAILED(rv))
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return rv;
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longName = (pathName.Length() + kMaxSequenceNumberLength >
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kMaxFilenameLength);
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if (!longName)
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{
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rv = Create(type, attributes);
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if (rv != NS_ERROR_FILE_ALREADY_EXISTS)
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return rv;
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}
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#ifdef XP_WIN
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rv = GetLeafName(leafName);
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if (NS_FAILED(rv))
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return rv;
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const PRInt32 lastDot = leafName.RFindChar(PRUnichar('.'));
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#else
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rv = GetNativeLeafName(leafName);
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if (NS_FAILED(rv))
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return rv;
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const PRInt32 lastDot = leafName.RFindChar('.');
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#endif
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if (lastDot == kNotFound)
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{
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rootName = leafName;
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}
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else
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{
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suffix = Substring(leafName, lastDot); // include '.'
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rootName = Substring(leafName, 0, lastDot); // strip suffix and dot
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}
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if (longName)
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{
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PRInt32 maxRootLength = (kMaxFilenameLength -
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(pathName.Length() - leafName.Length()) -
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suffix.Length() - kMaxSequenceNumberLength);
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// We cannot create an item inside a directory whose name is too long.
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// Also, ensure that at least one character remains after we truncate
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// the root name, as we don't want to end up with an empty leaf name.
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if (maxRootLength < 2)
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return NS_ERROR_FILE_UNRECOGNIZED_PATH;
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#ifdef XP_WIN
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// ensure that we don't cut the name in mid-UTF16-character
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rootName.SetLength(NS_IS_LOW_SURROGATE(rootName[maxRootLength]) ?
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maxRootLength - 1 : maxRootLength);
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SetLeafName(rootName + suffix);
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#else
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if (NS_IsNativeUTF8())
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{
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// ensure that we don't cut the name in mid-UTF8-character
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// (assume the name is valid UTF8 to begin with)
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while (UTF8traits::isInSeq(rootName[maxRootLength]))
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--maxRootLength;
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// Another check to avoid ending up with an empty leaf name.
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if (maxRootLength == 0 && suffix.IsEmpty())
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return NS_ERROR_FILE_UNRECOGNIZED_PATH;
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}
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rootName.SetLength(maxRootLength);
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SetNativeLeafName(rootName + suffix);
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#endif
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nsresult rv = Create(type, attributes);
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if (rv != NS_ERROR_FILE_ALREADY_EXISTS)
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return rv;
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}
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for (int indx = 1; indx < 10000; indx++)
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{
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// start with "Picture-1.jpg" after "Picture.jpg" exists
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#ifdef XP_WIN
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SetLeafName(rootName +
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NS_ConvertASCIItoUTF16(nsPrintfCString("-%d", indx)) +
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suffix);
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#else
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SetNativeLeafName(rootName + nsPrintfCString("-%d", indx) + suffix);
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#endif
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rv = Create(type, attributes);
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if (NS_SUCCEEDED(rv) || rv != NS_ERROR_FILE_ALREADY_EXISTS)
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return rv;
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}
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// The disk is full, sort of
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return NS_ERROR_FILE_TOO_BIG;
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}
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#if defined(XP_WIN) || defined(XP_OS2)
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static const PRUnichar kPathSeparatorChar = '\\';
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#elif defined(XP_UNIX) || defined(XP_BEOS)
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static const PRUnichar kPathSeparatorChar = '/';
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#else
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#error Need to define file path separator for your platform
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#endif
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static PRInt32 SplitPath(PRUnichar *path, PRUnichar **nodeArray, PRInt32 arrayLen)
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{
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if (*path == 0)
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return 0;
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PRUnichar **nodePtr = nodeArray;
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if (*path == kPathSeparatorChar)
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path++;
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*nodePtr++ = path;
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for (PRUnichar *cp = path; *cp != 0; cp++) {
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if (*cp == kPathSeparatorChar) {
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*cp++ = 0;
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if (*cp == 0)
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break;
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if (nodePtr - nodeArray >= arrayLen)
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return -1;
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*nodePtr++ = cp;
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}
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}
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return nodePtr - nodeArray;
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}
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NS_IMETHODIMP
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nsLocalFile::GetRelativeDescriptor(nsILocalFile *fromFile, nsACString& _retval)
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{
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NS_ENSURE_ARG_POINTER(fromFile);
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const PRInt32 kMaxNodesInPath = 32;
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//
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// _retval will be UTF-8 encoded
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//
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nsresult rv;
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_retval.Truncate(0);
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nsAutoString thisPath, fromPath;
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PRUnichar *thisNodes[kMaxNodesInPath], *fromNodes[kMaxNodesInPath];
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PRInt32 thisNodeCnt, fromNodeCnt, nodeIndex;
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rv = GetPath(thisPath);
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if (NS_FAILED(rv))
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return rv;
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rv = fromFile->GetPath(fromPath);
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if (NS_FAILED(rv))
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return rv;
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// get raw pointer to mutable string buffer
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PRUnichar *thisPathPtr; thisPath.BeginWriting(thisPathPtr);
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PRUnichar *fromPathPtr; fromPath.BeginWriting(fromPathPtr);
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thisNodeCnt = SplitPath(thisPathPtr, thisNodes, kMaxNodesInPath);
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fromNodeCnt = SplitPath(fromPathPtr, fromNodes, kMaxNodesInPath);
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if (thisNodeCnt < 0 || fromNodeCnt < 0)
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return NS_ERROR_FAILURE;
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for (nodeIndex = 0; nodeIndex < thisNodeCnt && nodeIndex < fromNodeCnt; ++nodeIndex) {
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#ifdef XP_WIN
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if (_wcsicmp(thisNodes[nodeIndex], fromNodes[nodeIndex]))
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break;
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#else
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if (nsCRT::strcmp(thisNodes[nodeIndex], fromNodes[nodeIndex]))
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break;
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#endif
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}
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PRInt32 branchIndex = nodeIndex;
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for (nodeIndex = branchIndex; nodeIndex < fromNodeCnt; nodeIndex++)
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_retval.AppendLiteral("../");
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for (nodeIndex = branchIndex; nodeIndex < thisNodeCnt; nodeIndex++) {
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NS_ConvertUTF16toUTF8 nodeStr(thisNodes[nodeIndex]);
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_retval.Append(nodeStr);
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if (nodeIndex + 1 < thisNodeCnt)
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_retval.Append('/');
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsLocalFile::SetRelativeDescriptor(nsILocalFile *fromFile, const nsACString& relativeDesc)
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{
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NS_NAMED_LITERAL_CSTRING(kParentDirStr, "../");
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nsCOMPtr<nsIFile> targetFile;
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nsresult rv = fromFile->Clone(getter_AddRefs(targetFile));
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if (NS_FAILED(rv))
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return rv;
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//
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// relativeDesc is UTF-8 encoded
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//
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nsCString::const_iterator strBegin, strEnd;
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relativeDesc.BeginReading(strBegin);
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relativeDesc.EndReading(strEnd);
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nsCString::const_iterator nodeBegin(strBegin), nodeEnd(strEnd);
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nsCString::const_iterator pos(strBegin);
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nsCOMPtr<nsIFile> parentDir;
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while (FindInReadable(kParentDirStr, nodeBegin, nodeEnd)) {
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rv = targetFile->GetParent(getter_AddRefs(parentDir));
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if (NS_FAILED(rv))
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return rv;
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if (!parentDir)
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return NS_ERROR_FILE_UNRECOGNIZED_PATH;
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targetFile = parentDir;
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nodeBegin = nodeEnd;
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pos = nodeEnd;
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nodeEnd = strEnd;
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}
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nodeBegin = nodeEnd = pos;
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while (nodeEnd != strEnd) {
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FindCharInReadable('/', nodeEnd, strEnd);
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targetFile->Append(NS_ConvertUTF8toUTF16(Substring(nodeBegin, nodeEnd)));
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if (nodeEnd != strEnd) // If there's more left in the string, inc over the '/' nodeEnd is on.
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++nodeEnd;
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nodeBegin = nodeEnd;
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}
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nsCOMPtr<nsILocalFile> targetLocalFile(do_QueryInterface(targetFile));
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return InitWithFile(targetLocalFile);
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}
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