gecko-dev/xpcom/build/FileLocation.cpp
2012-04-12 12:21:24 +02:00

198 lines
5.4 KiB
C++

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 code
*
* The Initial Developer of the Original Code is
* Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Mike Hommey <mh@glandium.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "FileLocation.h"
#include "nsZipArchive.h"
#include "nsURLHelper.h"
namespace mozilla {
FileLocation::FileLocation(const FileLocation &file, const char *path)
{
if (file.IsZip()) {
if (file.mBaseFile) {
Init(file.mBaseFile, file.mPath.get());
} else {
Init(file.mBaseZip, file.mPath.get());
}
if (path) {
PRInt32 i = mPath.RFindChar('/');
if (kNotFound == i) {
mPath.Truncate(0);
} else {
mPath.Truncate(i + 1);
}
mPath += path;
}
} else {
if (path) {
nsCOMPtr<nsIFile> cfile;
file.mBaseFile->GetParent(getter_AddRefs(cfile));
nsCOMPtr<nsILocalFile> clfile = do_QueryInterface(cfile);
#if defined(XP_WIN) || defined(XP_OS2)
nsCAutoString pathStr(path);
char *p;
PRUint32 len = pathStr.GetMutableData(&p);
for (; len; ++p, --len) {
if ('/' == *p) {
*p = '\\';
}
}
clfile->AppendRelativeNativePath(pathStr);
#else
clfile->AppendRelativeNativePath(nsDependentCString(path));
#endif
Init(clfile);
} else {
Init(file.mBaseFile);
}
}
}
void
FileLocation::GetURIString(nsACString &result) const
{
if (mBaseFile) {
net_GetURLSpecFromActualFile(mBaseFile, result);
} else if (mBaseZip) {
nsRefPtr<nsZipHandle> handler = mBaseZip->GetFD();
handler->mFile.GetURIString(result);
}
if (IsZip()) {
result.Insert("jar:", 0);
result += "!/";
result += mPath;
}
}
already_AddRefed<nsILocalFile>
FileLocation::GetBaseFile()
{
if (IsZip() && mBaseZip) {
nsRefPtr<nsZipHandle> handler = mBaseZip->GetFD();
if (handler)
return handler->mFile.GetBaseFile();
return NULL;
}
nsCOMPtr<nsILocalFile> file = mBaseFile;
return file.forget();
}
bool
FileLocation::Equals(const FileLocation &file) const
{
if (mPath != file.mPath)
return false;
if (mBaseFile && file.mBaseFile) {
bool eq;
return NS_SUCCEEDED(mBaseFile->Equals(file.mBaseFile, &eq)) && eq;
}
const FileLocation *a = this, *b = &file;
if (a->mBaseZip) {
nsRefPtr<nsZipHandle> handler = a->mBaseZip->GetFD();
a = &handler->mFile;
}
if (b->mBaseZip) {
nsRefPtr<nsZipHandle> handler = b->mBaseZip->GetFD();
b = &handler->mFile;
}
return a->Equals(*b);
}
nsresult
FileLocation::GetData(Data &data)
{
if (!IsZip()) {
return mBaseFile->OpenNSPRFileDesc(PR_RDONLY, 0444, &data.mFd.rwget());
}
data.mZip = mBaseZip;
if (!data.mZip) {
data.mZip = new nsZipArchive();
data.mZip->OpenArchive(mBaseFile);
}
data.mItem = data.mZip->GetItem(mPath.get());
if (data.mItem)
return NS_OK;
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
nsresult
FileLocation::Data::GetSize(PRUint32 *result)
{
if (mFd) {
PRFileInfo64 fileInfo;
if (PR_SUCCESS != PR_GetOpenFileInfo64(mFd, &fileInfo))
return NS_ErrorAccordingToNSPR();
if (fileInfo.size > PRInt64(PR_UINT32_MAX))
return NS_ERROR_FILE_TOO_BIG;
*result = fileInfo.size;
return NS_OK;
} else if (mItem) {
*result = mItem->RealSize();
return NS_OK;
}
return NS_ERROR_NOT_INITIALIZED;
}
nsresult
FileLocation::Data::Copy(char *buf, PRUint32 len)
{
if (mFd) {
for (PRUint32 totalRead = 0; totalRead < len; ) {
PRInt32 read = PR_Read(mFd, buf + totalRead, NS_MIN(len - totalRead, PRUint32(PR_INT32_MAX)));
if (read < 0)
return NS_ErrorAccordingToNSPR();
totalRead += read;
}
return NS_OK;
} else if (mItem) {
nsZipCursor cursor(mItem, mZip, reinterpret_cast<PRUint8 *>(buf), len, true);
PRUint32 readLen;
cursor.Copy(&readLen);
return (readLen == len) ? NS_OK : NS_ERROR_FILE_CORRUPTED;
}
return NS_ERROR_NOT_INITIALIZED;
}
} /* namespace mozilla */