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nsLocalFileOS2.cpp
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nsLocalFileOS2.cpp
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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 Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Henry Sobotka <sobotka@axess.com>
* IBM Corp.
* Rich Walsh <dragtext@e-vertise.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of 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 ***** */
// N.B. the ns* & pr* headers below will #include all
// of the standard library headers this file requires
#include "nsCOMPtr.h"
#include "nsMemory.h"
#include "nsLocalFile.h"
#include "nsNativeCharsetUtils.h"
#include "nsISimpleEnumerator.h"
#include "nsIDirectoryEnumerator.h"
#include "nsIComponentManager.h"
#include "prtypes.h"
#include "prio.h"
#include "nsReadableUtils.h"
#include "nsISupportsPrimitives.h"
#include "nsIMutableArray.h"
#include "nsTraceRefcntImpl.h"
#define CHECK_mWorkingPath() \
PR_BEGIN_MACRO \
if (mWorkingPath.IsEmpty()) \
return NS_ERROR_NOT_INITIALIZED; \
PR_END_MACRO
//-----------------------------------------------------------------------------
// static helper functions
//-----------------------------------------------------------------------------
static nsresult ConvertOS2Error(int err)
{
nsresult rv;
switch (err)
{
case ERROR_FILE_NOT_FOUND:
case ERROR_PATH_NOT_FOUND:
case ERROR_INVALID_DRIVE:
rv = NS_ERROR_FILE_NOT_FOUND;
break;
case ERROR_ACCESS_DENIED:
case ERROR_NOT_SAME_DEVICE:
rv = NS_ERROR_FILE_ACCESS_DENIED;
break;
case ERROR_NOT_ENOUGH_MEMORY:
case ERROR_INVALID_BLOCK:
case ERROR_INVALID_HANDLE:
case ERROR_ARENA_TRASHED:
rv = NS_ERROR_OUT_OF_MEMORY;
break;
case ERROR_CURRENT_DIRECTORY:
rv = NS_ERROR_FILE_DIR_NOT_EMPTY;
break;
case ERROR_WRITE_PROTECT:
rv = NS_ERROR_FILE_READ_ONLY;
break;
case ERROR_HANDLE_DISK_FULL:
rv = NS_ERROR_FILE_TOO_BIG;
break;
case ERROR_FILE_EXISTS:
case ERROR_ALREADY_EXISTS:
case ERROR_CANNOT_MAKE:
rv = NS_ERROR_FILE_ALREADY_EXISTS;
break;
case ERROR_FILENAME_EXCED_RANGE:
rv = NS_ERROR_FILE_NAME_TOO_LONG;
break;
case 0:
rv = NS_OK;
default:
rv = NS_ERROR_FAILURE;
}
return rv;
}
static void
myLL_L2II(PRInt64 result, PRInt32 *hi, PRInt32 *lo )
{
PRInt64 a64, b64; // probably could have been done with
// only one PRInt64, but these are macros,
// and I am a wimp.
// shift the hi word to the low word, then push it into a long.
LL_SHR(a64, result, 32);
LL_L2I(*hi, a64);
// shift the low word to the hi word first, then shift it back.
LL_SHL(b64, result, 32);
LL_SHR(a64, b64, 32);
LL_L2I(*lo, a64);
}
// Locates the first occurrence of charToSearchFor in the stringToSearch
static unsigned char*
_mbschr(const unsigned char* stringToSearch, int charToSearchFor)
{
const unsigned char* p = stringToSearch;
do {
if (*p == charToSearchFor)
break;
p = (const unsigned char*)WinNextChar(0,0,0,(char*)p);
} while (*p);
// Result is p or NULL
return *p ? (unsigned char*)p : NULL;
}
// Locates the first occurrence of subString in the stringToSearch
static unsigned char*
_mbsstr(const unsigned char* stringToSearch, const unsigned char* subString)
{
const unsigned char* pStr = stringToSearch;
const unsigned char* pSub = subString;
do {
while (*pStr && *pStr != *pSub)
pStr = (const unsigned char*)WinNextChar(0,0,0,(char*)pStr);
if (!*pStr)
break;
const unsigned char* pNxt = pStr;
do {
pSub = (const unsigned char*)WinNextChar(0,0,0,(char*)pSub);
pNxt = (const unsigned char*)WinNextChar(0,0,0,(char*)pNxt);
} while (*pSub && *pSub == *pNxt);
if (!*pSub)
break;
pSub = subString;
pStr = (const unsigned char*)WinNextChar(0,0,0,(char*)pStr);
} while (*pStr);
// if we got to the end of pSub, we've found it
return *pSub ? NULL : (unsigned char*)pStr;
}
// Locates last occurence of charToSearchFor in the stringToSearch
NS_EXPORT unsigned char*
_mbsrchr(const unsigned char* stringToSearch, int charToSearchFor)
{
int length = strlen((const char*)stringToSearch);
const unsigned char* p = stringToSearch+length;
do {
if (*p == charToSearchFor)
break;
p = (const unsigned char*)WinPrevChar(0,0,0,(char*)stringToSearch,(char*)p);
} while (p > stringToSearch);
// Result is p or NULL
return (*p == charToSearchFor) ? (unsigned char*)p : NULL;
}
// Implement equivalent of Win32 CreateDirectoryA
static nsresult
CreateDirectoryA(PSZ path, PEAOP2 ppEABuf)
{
APIRET rc;
nsresult rv;
FILESTATUS3 pathInfo;
rc = DosCreateDir(path, ppEABuf);
if (rc != NO_ERROR)
{
rv = ConvertOS2Error(rc);
// Check if directory already exists and if so,
// reflect that in the return value
rc = DosQueryPathInfo(path, FIL_STANDARD,
&pathInfo, sizeof(pathInfo));
if (rc == NO_ERROR)
rv = ERROR_FILE_EXISTS;
}
else
rv = rc;
return rv;
}
static int isleadbyte(int c)
{
static BOOL bDBCSFilled = FALSE;
// According to the Control Program Guide&Ref, 12 bytes is sufficient
static BYTE DBCSInfo[12] = { 0 };
BYTE *curr;
BOOL retval = FALSE;
if(!bDBCSFilled)
{
COUNTRYCODE ctrycodeInfo = { 0 };
APIRET rc = NO_ERROR;
ctrycodeInfo.country = 0; // Current Country
ctrycodeInfo.codepage = 0; // Current Codepage
rc = DosQueryDBCSEnv(sizeof(DBCSInfo), &ctrycodeInfo, DBCSInfo);
// we had an error, do something?
if (rc != NO_ERROR)
return FALSE;
bDBCSFilled=TRUE;
}
// DBCSInfo returned by DosQueryDBCSEnv is terminated
// with two '0' bytes in a row
curr = DBCSInfo;
while(*curr != 0 && *(curr+1) != 0)
{
if(c >= *curr && c <= *(curr+1))
{
retval=TRUE;
break;
}
curr+=2;
}
return retval;
}
//-----------------------------------------------------------------------------
// nsDirEnumerator
//-----------------------------------------------------------------------------
class nsDirEnumerator : public nsISimpleEnumerator,
public nsIDirectoryEnumerator
{
public:
NS_DECL_ISUPPORTS
nsDirEnumerator() : mDir(nsnull)
{
}
nsresult Init(nsILocalFile* parent)
{
nsCAutoString filepath;
parent->GetNativeTarget(filepath);
if (filepath.IsEmpty())
{
parent->GetNativePath(filepath);
}
if (filepath.IsEmpty())
{
return NS_ERROR_UNEXPECTED;
}
mDir = PR_OpenDir(filepath.get());
if (mDir == nsnull) // not a directory?
return NS_ERROR_FAILURE;
mParent = parent;
return NS_OK;
}
NS_IMETHOD HasMoreElements(PRBool *result)
{
nsresult rv;
if (mNext == nsnull && mDir)
{
PRDirEntry* entry = PR_ReadDir(mDir, PR_SKIP_BOTH);
if (entry == nsnull)
{
// end of dir entries
PRStatus status = PR_CloseDir(mDir);
if (status != PR_SUCCESS)
return NS_ERROR_FAILURE;
mDir = nsnull;
*result = PR_FALSE;
return NS_OK;
}
nsCOMPtr<nsIFile> file;
rv = mParent->Clone(getter_AddRefs(file));
if (NS_FAILED(rv))
return rv;
rv = file->AppendNative(nsDependentCString(entry->name));
if (NS_FAILED(rv))
return rv;
// make sure the thing exists. If it does, try the next one.
PRBool exists;
rv = file->Exists(&exists);
if (NS_FAILED(rv) || !exists)
{
return HasMoreElements(result);
}
mNext = do_QueryInterface(file);
}
*result = mNext != nsnull;
if (!*result)
Close();
return NS_OK;
}
NS_IMETHOD GetNext(nsISupports **result)
{
nsresult rv;
PRBool hasMore;
rv = HasMoreElements(&hasMore);
if (NS_FAILED(rv)) return rv;
*result = mNext; // might return nsnull
NS_IF_ADDREF(*result);
mNext = nsnull;
return NS_OK;
}
NS_IMETHOD GetNextFile(nsIFile **result)
{
*result = nsnull;
PRBool hasMore = PR_FALSE;
nsresult rv = HasMoreElements(&hasMore);
if (NS_FAILED(rv) || !hasMore)
return rv;
*result = mNext;
NS_IF_ADDREF(*result);
mNext = nsnull;
return NS_OK;
}
NS_IMETHOD Close()
{
if (mDir)
{
PRStatus status = PR_CloseDir(mDir);
NS_ASSERTION(status == PR_SUCCESS, "close failed");
if (status != PR_SUCCESS)
return NS_ERROR_FAILURE;
mDir = nsnull;
}
return NS_OK;
}
// dtor can be non-virtual since there are no subclasses, but must be
// public to use the class on the stack.
~nsDirEnumerator()
{
Close();
}
protected:
PRDir* mDir;
nsCOMPtr<nsILocalFile> mParent;
nsCOMPtr<nsILocalFile> mNext;
};
NS_IMPL_ISUPPORTS2(nsDirEnumerator, nsISimpleEnumerator, nsIDirectoryEnumerator)
//-----------------------------------------------------------------------------
// nsDriveEnumerator
//-----------------------------------------------------------------------------
class nsDriveEnumerator : public nsISimpleEnumerator
{
public:
nsDriveEnumerator();
virtual ~nsDriveEnumerator();
NS_DECL_ISUPPORTS
NS_DECL_NSISIMPLEENUMERATOR
nsresult Init();
private:
// mDrives is a bitmap representing the available drives
// mLetter is incremented each time mDrives is shifted rightward
PRUint32 mDrives;
PRUint8 mLetter;
};
NS_IMPL_ISUPPORTS1(nsDriveEnumerator, nsISimpleEnumerator)
nsDriveEnumerator::nsDriveEnumerator()
: mDrives(0), mLetter(0)
{
}
nsDriveEnumerator::~nsDriveEnumerator()
{
}
nsresult nsDriveEnumerator::Init()
{
ULONG ulCurrent;
// bits 0-25 in mDrives represent each possible drive, A-Z
DosError(FERR_DISABLEHARDERR);
APIRET rc = DosQueryCurrentDisk(&ulCurrent, (PULONG)&mDrives);
DosError(FERR_ENABLEHARDERR);
if (rc)
return NS_ERROR_FAILURE;
mLetter = 'A';
return NS_OK;
}
NS_IMETHODIMP nsDriveEnumerator::HasMoreElements(PRBool *aHasMore)
{
// no more bits means no more drives
*aHasMore = (mDrives != 0);
return NS_OK;
}
NS_IMETHODIMP nsDriveEnumerator::GetNext(nsISupports **aNext)
{
if (!mDrives)
{
*aNext = nsnull;
return NS_OK;
}
// if bit 0 is off, advance to the next bit that's on
while ((mDrives & 1) == 0)
{
mDrives >>= 1;
mLetter++;
}
// format a drive string, then advance to the next possible drive
char drive[4] = "x:\\";
drive[0] = mLetter;
mDrives >>= 1;
mLetter++;
nsILocalFile *file;
nsresult rv = NS_NewNativeLocalFile(nsDependentCString(drive),
PR_FALSE, &file);
*aNext = file;
return rv;
}
//-----------------------------------------------------------------------------
// class TypeEaEnumerator - a convenience for accessing
// a file's .TYPE extended attribute
//-----------------------------------------------------------------------------
// this struct describes the first entry for an MVMT or MVST EA;
// .TYPE is supposed to be MVMT but is sometimes malformed as MVST
typedef struct _MVHDR {
USHORT usEAType;
USHORT usCodePage;
USHORT usNumEntries;
USHORT usDataType;
USHORT usDataLth;
char data[1];
} MVHDR;
typedef MVHDR *PMVHDR;
class TypeEaEnumerator
{
public:
TypeEaEnumerator() : mEaBuf(nsnull) { }
~TypeEaEnumerator() { if (mEaBuf) NS_Free(mEaBuf); }
nsresult Init(nsLocalFile * aFile);
char * GetNext(PRUint32 *lth);
private:
char * mEaBuf;
char * mpCur;
PMVHDR mpMvh;
USHORT mLth;
USHORT mCtr;
};
nsresult TypeEaEnumerator::Init(nsLocalFile * aFile)
{
#define EABUFSIZE 512
// provide a buffer for the results
mEaBuf = (char*)NS_Alloc(EABUFSIZE);
if (!mEaBuf)
return NS_ERROR_OUT_OF_MEMORY;
PFEA2LIST pfea2list = (PFEA2LIST)mEaBuf;
pfea2list->cbList = EABUFSIZE;
// ask for the .TYPE extended attribute
nsresult rv = aFile->GetEA(".TYPE", pfea2list);
if (NS_FAILED(rv))
return rv;
// point at the data - it starts immediately after the EA's name;
// then confirm the EA is MVMT (correct) or MVST (acceptable)
mpMvh = (PMVHDR)&(pfea2list->list[0].szName[pfea2list->list[0].cbName+1]);
if (mpMvh->usEAType != EAT_MVMT)
if (mpMvh->usEAType != EAT_MVST || mpMvh->usDataType != EAT_ASCII)
return NS_ERROR_FAILURE;
// init the variables that tell us where we are in the lsit
mLth = 0;
mCtr = 0;
mpCur = (char*)(mpMvh->usEAType == EAT_MVMT ?
&mpMvh->usDataType : &mpMvh->usDataLth);
return NS_OK;
}
char * TypeEaEnumerator::GetNext(PRUint32 *lth)
{
char * result = nsnull;
// this is a loop so we can skip invalid entries if needed;
// normally, it will break out on the first iteration
while (mCtr++ < mpMvh->usNumEntries) {
// advance to the next entry
mpCur += mLth;
// if MVMT, ensure the datatype is OK, then advance
// to the length field present in both formats
if (mpMvh->usEAType == EAT_MVMT) {
if (*((PUSHORT)mpCur) != EAT_ASCII)
continue;
mpCur += sizeof(USHORT);
}
// get the data's length, point at the data itself, then exit
mLth = *lth = *((PUSHORT)mpCur);
mpCur += sizeof(USHORT);
result = mpCur;
break;
}
return result;
}
//-----------------------------------------------------------------------------
// nsLocalFile <public>
//-----------------------------------------------------------------------------
nsLocalFile::nsLocalFile()
: mDirty(PR_TRUE)
{
}
nsresult
nsLocalFile::nsLocalFileConstructor(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr)
{
NS_ENSURE_ARG_POINTER(aInstancePtr);
NS_ENSURE_NO_AGGREGATION(outer);
nsLocalFile* inst = new nsLocalFile();
if (inst == NULL)
return NS_ERROR_OUT_OF_MEMORY;
nsresult rv = inst->QueryInterface(aIID, aInstancePtr);
if (NS_FAILED(rv))
{
delete inst;
return rv;
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsLocalFile::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_THREADSAFE_ISUPPORTS4(nsLocalFile,
nsILocalFile,
nsIFile,
nsILocalFileOS2,
nsIHashable)
//-----------------------------------------------------------------------------
// nsLocalFile <private>
//-----------------------------------------------------------------------------
nsLocalFile::nsLocalFile(const nsLocalFile& other)
: mDirty(PR_TRUE)
, mWorkingPath(other.mWorkingPath)
{
}
// Stat the path. After a successful return the path is
// guaranteed valid and the members of mFileInfo64 can be used.
nsresult
nsLocalFile::Stat()
{
// if we aren't dirty then we are already done
if (!mDirty)
return NS_OK;
// we can't stat anything that isn't a valid NSPR addressable path
if (mWorkingPath.IsEmpty())
return NS_ERROR_FILE_INVALID_PATH;
// hack designed to work around bug 134796 until it is fixed
char temp[4];
const char *nsprPath = mWorkingPath.get();
if (mWorkingPath.Length() == 2 && mWorkingPath.CharAt(1) == ':')
{
temp[0] = mWorkingPath[0];
temp[1] = mWorkingPath[1];
temp[2] = '\\';
temp[3] = '\0';
nsprPath = temp;
}
// see if the working path exists
DosError(FERR_DISABLEHARDERR);
PRStatus status = PR_GetFileInfo64(nsprPath, &mFileInfo64);
DosError(FERR_ENABLEHARDERR);
if (status != PR_SUCCESS)
return NS_ERROR_FILE_NOT_FOUND;
mDirty = PR_FALSE;
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsLocalFile::nsIFile,nsILocalFile
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsLocalFile::Clone(nsIFile **file)
{
// Just copy-construct ourselves
*file = new nsLocalFile(*this);
if (!*file)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*file);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::InitWithNativePath(const nsACString &filePath)
{
MakeDirty();
nsACString::const_iterator begin, end;
filePath.BeginReading(begin);
filePath.EndReading(end);
// input string must not be empty
if (begin == end)
return NS_ERROR_FAILURE;
char firstChar = *begin;
char secondChar = *(++begin);
// just do a sanity check. if it has any forward slashes, it is not
// a Native path. Also, it must have a colon at after the first char.
if (FindCharInReadable('/', begin, end))
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
if (secondChar != ':' && (secondChar != '\\' || firstChar != '\\'))
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
mWorkingPath = filePath;
// kill any trailing '\' provided it isn't the second char of DBCS
PRInt32 len = mWorkingPath.Length() - 1;
if (mWorkingPath[len] == '\\' && !::isleadbyte(mWorkingPath[len - 1]))
mWorkingPath.Truncate(len);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::OpenNSPRFileDesc(PRInt32 flags, PRInt32 mode, PRFileDesc **_retval)
{
nsresult rv = Stat();
if (NS_FAILED(rv) && rv != NS_ERROR_FILE_NOT_FOUND)
return rv;
*_retval = PR_Open(mWorkingPath.get(), flags, mode);
if (*_retval)
return NS_OK;
if (flags & DELETE_ON_CLOSE) {
PR_Delete(mWorkingPath.get());
}
return NS_ErrorAccordingToNSPR();
}
NS_IMETHODIMP
nsLocalFile::OpenANSIFileDesc(const char *mode, FILE * *_retval)
{
nsresult rv = Stat();
if (NS_FAILED(rv) && rv != NS_ERROR_FILE_NOT_FOUND)
return rv;
*_retval = fopen(mWorkingPath.get(), mode);
if (*_retval)
return NS_OK;
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsLocalFile::Create(PRUint32 type, PRUint32 attributes)
{
if (type != NORMAL_FILE_TYPE && type != DIRECTORY_TYPE)
return NS_ERROR_FILE_UNKNOWN_TYPE;
nsresult rv = Stat();
if (NS_FAILED(rv) && rv != NS_ERROR_FILE_NOT_FOUND)
return rv;
// create directories to target
//
// A given local file can be either one of these forms:
//
// - normal: X:\some\path\on\this\drive
// ^--- start here
//
// - UNC path: \\machine\volume\some\path\on\this\drive
// ^--- start here
//
// Skip the first 'X:\' for the first form, and skip the first full
// '\\machine\volume\' segment for the second form.
unsigned char* path = (unsigned char*) mWorkingPath.BeginWriting();
if (path[0] == '\\' && path[1] == '\\')
{
// dealing with a UNC path here; skip past '\\machine\'
path = _mbschr(path + 2, '\\');
if (!path)
return NS_ERROR_FILE_INVALID_PATH;
++path;
}
// search for first slash after the drive (or volume) name
unsigned char* slash = _mbschr(path, '\\');
if (slash)
{
// skip the first '\\'
++slash;
slash = _mbschr(slash, '\\');
while (slash)
{
*slash = '\0';
rv = CreateDirectoryA(const_cast<char*>(mWorkingPath.get()), NULL);
if (rv) {
rv = ConvertOS2Error(rv);
if (rv != NS_ERROR_FILE_ALREADY_EXISTS)
return rv;
}
*slash = '\\';
++slash;
slash = _mbschr(slash, '\\');
}
}
if (type == NORMAL_FILE_TYPE)
{
PRFileDesc* file = PR_Open(mWorkingPath.get(), PR_RDONLY | PR_CREATE_FILE | PR_APPEND | PR_EXCL, attributes);
if (!file)
return NS_ERROR_FILE_ALREADY_EXISTS;
PR_Close(file);
return NS_OK;
}
if (type == DIRECTORY_TYPE)
{
rv = CreateDirectoryA(const_cast<char*>(mWorkingPath.get()), NULL);
if (rv)
return ConvertOS2Error(rv);
else
return NS_OK;
}
return NS_ERROR_FILE_UNKNOWN_TYPE;
}
NS_IMETHODIMP
nsLocalFile::AppendNative(const nsACString &node)
{
// append this path, multiple components are not permitted
return AppendNativeInternal(PromiseFlatCString(node), PR_FALSE);
}
NS_IMETHODIMP
nsLocalFile::AppendRelativeNativePath(const nsACString &node)
{
// append this path, multiple components are permitted
return AppendNativeInternal(PromiseFlatCString(node), PR_TRUE);
}
nsresult
nsLocalFile::AppendNativeInternal(const nsAFlatCString &node, PRBool multipleComponents)
{
if (node.IsEmpty())
return NS_OK;
// check the relative path for validity
const unsigned char * nodePath = (const unsigned char *) node.get();
if (*nodePath == '\\' // can't start with an '\'
|| _mbschr(nodePath, '/') // can't contain /
|| node.Equals("..")) // can't be ..
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
if (multipleComponents)
{
// can't contain .. as a path component. Ensure that the valid components
// "foo..foo", "..foo", and "foo.." are not falsely detected, but the invalid
// paths "..\", "foo\..", "foo\..\foo", "..\foo", etc are.
const unsigned char * doubleDot = _mbsstr(nodePath, (const unsigned char *)"\\..");
while (doubleDot)
{
doubleDot += 3;
if (*doubleDot == '\0' || *doubleDot == '\\')
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
doubleDot = _mbsstr(doubleDot, (unsigned char *)"\\..");
}
// catches the remaining cases of prefixes (i.e. '..\')
// note: this is a substitute for Win32's _mbsncmp(nodePath, "..\\", 3)
if (*nodePath == '.') {
nodePath = (const unsigned char*)WinNextChar(0,0,0,(char*)nodePath);
if (*nodePath == '.' &&
*WinNextChar(0,0,0,(char*)nodePath) == '\\')
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
}
else if (_mbschr(nodePath, '\\')) // single components can't contain '\'
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
MakeDirty();
mWorkingPath.Append(NS_LITERAL_CSTRING("\\") + node);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::Normalize()
{
// XXX See bug 187957 comment 18 for possible problems with this implementation.
if (mWorkingPath.IsEmpty())
return NS_OK;
// work in unicode for ease
nsAutoString path;
NS_CopyNativeToUnicode(mWorkingPath, path);
// find the index of the root backslash for the path. Everything before
// this is considered fully normalized and cannot be ascended beyond
// using ".." For a local drive this is the first slash (e.g. "c:\").
// For a UNC path it is the slash following the share name
// (e.g. "\\server\share\").
PRInt32 rootIdx = 2; // default to local drive
if (path.First() == '\\') // if a share then calculate the rootIdx
{
rootIdx = path.FindChar('\\', 2); // skip \\ in front of the server
if (rootIdx == kNotFound)
return NS_OK; // already normalized
rootIdx = path.FindChar('\\', rootIdx+1);
if (rootIdx == kNotFound)
return NS_OK; // already normalized
}
else if (path.CharAt(rootIdx) != '\\')
{
// The path has been specified relative to the current working directory
// for that drive. To normalize it, the current working directory for
// that drive needs to be inserted before the supplied relative path
// which will provide an absolute path (and the rootIdx will still be 2).
char drv[4] = "A:.";
char cwd[CCHMAXPATH];
drv[0] = mWorkingPath.First();
if (DosQueryPathInfo(drv, FIL_QUERYFULLNAME, cwd, sizeof(cwd)))
return NS_ERROR_FILE_NOT_FOUND;
nsAutoString currentDir;
NS_CopyNativeToUnicode(nsDependentCString(cwd), currentDir);
if (currentDir.Last() == '\\')
path.Replace(0, 2, currentDir);
else
path.Replace(0, 2, currentDir + NS_LITERAL_STRING("\\"));
}
NS_POSTCONDITION(0 < rootIdx && rootIdx < (PRInt32)path.Length(), "rootIdx is invalid");
NS_POSTCONDITION(path.CharAt(rootIdx) == '\\', "rootIdx is invalid");
// if there is nothing following the root path then it is already normalized
if (rootIdx + 1 == (PRInt32)path.Length())
return NS_OK;
// assign the root
nsAutoString normal;
const PRUnichar * pathBuffer = path.get(); // simplify access to the buffer
normal.SetCapacity(path.Length()); // it won't ever grow longer
normal.Assign(pathBuffer, rootIdx);
// Normalize the path components. The actions taken are:
//
// "\\" condense to single backslash
// "." remove from path
// ".." up a directory
// "..." remove from path (any number of dots > 2)
//
// The last form is something that Windows 95 and 98 supported and
// is a shortcut for changing up multiple directories. Windows XP
// and ilk ignore it in a path, as is done here.
PRInt32 len, begin, end = rootIdx;
while (end < (PRInt32)path.Length())
{
// find the current segment (text between the backslashes) to
// be examined, this will set the following variables:
// begin == index of first char in segment
// end == index 1 char after last char in segment
// len == length of segment
begin = end + 1;
end = path.FindChar('\\', begin);
if (end == kNotFound)
end = path.Length();
len = end - begin;
// ignore double backslashes
if (len == 0)
continue;
// len != 0, and interesting paths always begin with a dot
if (pathBuffer[begin] == '.')
{
// ignore single dots
if (len == 1)
continue;
// handle multiple dots
if (len >= 2 && pathBuffer[begin+1] == '.')
{
// back up a path component on double dot
if (len == 2)
{
PRInt32 prev = normal.RFindChar('\\');
if (prev >= rootIdx)