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gecko-dev/xpcom/obsolete/nsFileSpecUnix.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Henry Sobotka <sobotka@axess.com>
* William Bonnet <wbonnet@on-x.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 ***** */
// This file is included by nsFileSpec.cpp, and includes the Unix-specific
// implementations.
#include <sys/stat.h>
#include <sys/param.h>
#include <errno.h>
#include <dirent.h>
#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#include "xpcom-private.h"
#include "nsError.h"
#include "prio.h" /* for PR_Rename */
#include "nsTArray.h"
#if defined(_SCO_DS)
#define _SVID3 /* for statvfs.h */
#endif
#ifdef HAVE_SYS_STATVFS_H
#include <sys/statvfs.h>
#endif
#ifdef HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif
#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#undef Free
#endif
#ifdef HAVE_STATVFS
#define STATFS statvfs
#else
#define STATFS statfs
#endif
#ifndef MAXPATHLEN
#define MAXPATHLEN 1024 /* Guessing this is okay. Works for SCO. */
#endif
#if defined(__QNX__)
#include <unix.h> /* for realpath */
#define f_bavail f_bfree
extern "C" int truncate(const char *, off_t);
#endif
#if defined(SUNOS4)
extern "C" int statfs(char *, struct statfs *);
#endif
#if defined(OSF1)
extern "C" int statvfs(const char *, struct statvfs *);
#endif
#ifdef XP_MACOSX
static void CopyUTF8toUTF16NFC(const nsACString& aSrc, nsAString& aResult);
#endif
//----------------------------------------------------------------------------------------
void nsFileSpecHelpers::Canonify(nsSimpleCharString& ioPath, PRBool inMakeDirs)
// Canonify, make absolute, and check whether directories exist
//----------------------------------------------------------------------------------------
{
if (ioPath.IsEmpty())
return;
if (inMakeDirs)
{
const mode_t mode = 0755;
nsFileSpecHelpers::MakeAllDirectories((const char*)ioPath, mode);
}
errno = 0; // needed?
if (ioPath[0] != '/')
{
// the ioPath that was passed in is relative. We must cat it to the cwd.
char buffer[MAXPATHLEN];
(void) getcwd(buffer, MAXPATHLEN);
strcat(buffer, "/");
strcat(buffer, ioPath);
ioPath = buffer;
}
} // nsFileSpecHelpers::Canonify
//----------------------------------------------------------------------------------------
void nsFileSpec::SetLeafName(const char* inLeafName)
//----------------------------------------------------------------------------------------
{
mPath.LeafReplace('/', inLeafName);
} // nsFileSpec::SetLeafName
//----------------------------------------------------------------------------------------
char* nsFileSpec::GetLeafName() const
//----------------------------------------------------------------------------------------
{
#ifndef XP_MACOSX
return mPath.GetLeaf('/');
#else
char *name = mPath.GetLeaf('/');
if (!name || !*name)
return name;
nsAutoString nameInNFC;
CopyUTF8toUTF16NFC(nsDependentCString(name), nameInNFC);
nsCRT::free(name);
return nsCRT::strdup(NS_ConvertUTF16toUTF8(nameInNFC).get());
#endif
} // nsFileSpec::GetLeafName
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::Exists() const
//----------------------------------------------------------------------------------------
{
return !mPath.IsEmpty() && 0 == access(mPath, F_OK);
} // nsFileSpec::Exists
//----------------------------------------------------------------------------------------
void nsFileSpec::GetModDate(TimeStamp& outStamp) const
//----------------------------------------------------------------------------------------
{
struct stat st;
if (!mPath.IsEmpty() && stat(mPath, &st) == 0)
outStamp = st.st_mtime;
else
outStamp = 0;
} // nsFileSpec::GetModDate
//----------------------------------------------------------------------------------------
PRUint32 nsFileSpec::GetFileSize() const
//----------------------------------------------------------------------------------------
{
struct stat st;
if (!mPath.IsEmpty() && stat(mPath, &st) == 0)
return (PRUint32)st.st_size;
return 0;
} // nsFileSpec::GetFileSize
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsFile() const
//----------------------------------------------------------------------------------------
{
struct stat st;
return !mPath.IsEmpty() && stat(mPath, &st) == 0 && S_ISREG(st.st_mode);
} // nsFileSpec::IsFile
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsDirectory() const
//----------------------------------------------------------------------------------------
{
struct stat st;
return !mPath.IsEmpty() && 0 == stat(mPath, &st) && S_ISDIR(st.st_mode);
} // nsFileSpec::IsDirectory
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsHidden() const
//----------------------------------------------------------------------------------------
{
PRBool hidden = PR_FALSE;
char *leafname = GetLeafName();
if (nsnull != leafname)
{
// rjc: don't return ".", "..", or any file/directory that begins with a "."
/* if ((!strcmp(leafname, ".")) || (!strcmp(leafname, ".."))) */
if (leafname[0] == '.')
{
hidden = PR_TRUE;
}
nsCRT::free(leafname);
}
return hidden;
} // nsFileSpec::IsHidden
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsSymlink() const
//----------------------------------------------------------------------------------------
{
struct stat st;
if (!mPath.IsEmpty() && stat(mPath, &st) == 0 && S_ISLNK(st.st_mode))
return PR_TRUE;
return PR_FALSE;
} // nsFileSpec::IsSymlink
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::ResolveSymlink(PRBool& wasAliased)
//----------------------------------------------------------------------------------------
{
wasAliased = PR_FALSE;
char resolvedPath[MAXPATHLEN];
int charCount = readlink(mPath, (char*)&resolvedPath, MAXPATHLEN);
if (0 < charCount)
{
if (MAXPATHLEN > charCount)
resolvedPath[charCount] = '\0';
wasAliased = PR_TRUE;
/* if it's not an absolute path,
replace the leaf with what got resolved */
if (resolvedPath[0] != '/') {
SetLeafName(resolvedPath);
}
else {
mPath = (char*)&resolvedPath;
}
char* canonicalPath = realpath((const char *)mPath, resolvedPath);
NS_ASSERTION(canonicalPath, "realpath failed");
if (canonicalPath) {
mPath = (char*)&resolvedPath;
}
else {
return NS_ERROR_FAILURE;
}
}
return NS_OK;
} // nsFileSpec::ResolveSymlink
//----------------------------------------------------------------------------------------
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;
char endChar = mPath[(int)(strlen(mPath) - 1)];
if (endChar == '/')
mPath += "x";
else
mPath += "/x";
SetLeafName(inRelativePath);
} // nsFileSpec::operator +=
//----------------------------------------------------------------------------------------
void nsFileSpec::CreateDirectory(int mode)
//----------------------------------------------------------------------------------------
{
// Note that mPath is canonical!
if (mPath.IsEmpty())
return;
mkdir(mPath, mode);
} // nsFileSpec::CreateDirectory
//----------------------------------------------------------------------------------------
void nsFileSpec::Delete(PRBool inRecursive) const
// To check if this worked, call Exists() afterwards, see?
//----------------------------------------------------------------------------------------
{
if (IsDirectory())
{
if (inRecursive)
{
for (nsDirectoryIterator i(*this, PR_FALSE); i.Exists(); i++)
{
nsFileSpec& child = (nsFileSpec&)i;
child.Delete(inRecursive);
}
}
rmdir(mPath);
}
else if (!mPath.IsEmpty())
remove(mPath);
} // 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 offset) const
//----------------------------------------------------------------------------------------
{
char* Path = nsCRT::strdup(mPath);
int rv = truncate(Path, offset) ;
nsCRT::free(Path) ;
if(!rv)
return NS_OK ;
else
return NS_ERROR_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 (mPath.IsEmpty() || 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;
nsCRT::free(oldPath);
return NS_FILE_FAILURE;
}
nsCRT::free(oldPath);
return NS_OK;
} // nsFileSpec::Rename
//----------------------------------------------------------------------------------------
static int CrudeFileCopy_DoCopy(PRFileDesc * pFileDescIn, PRFileDesc * pFileDescOut, char * pBuf, long bufferSize)
//----------------------------------------------------------------------------------------
{
PRInt32 rbytes, wbytes; // Number of bytes read and written in copy loop
// Copy loop
//
// If EOF is reached and no data is available, PR_Read returns 0. A negative
// return value means an error occured
rbytes = PR_Read(pFileDescIn, pBuf, bufferSize);
if (rbytes < 0) // Test if read was unsuccessfull
{ // Error case
return -1; // Return an error
}
while (rbytes > 0) // While there is data to copy
{
// Data buffer size is only 1K ! fwrite function is able to write it in
// one call. According to the man page fwrite returns a number of elements
// written if an error occured. Thus there is no need to handle this case
// as a normal case. Written data cannot be smaller than rbytes.
wbytes = PR_Write(pFileDescOut, pBuf, rbytes); // Copy data to output file
if (wbytes != rbytes) // Test if all data was written
{ // No this an error
return -1; // Return an error
}
// Write is done, we try to get more data
rbytes = PR_Read(pFileDescIn, pBuf, bufferSize);
if (rbytes < 0) // Test if read was unsuccessful
{ // Error case
return -1; // Return an error
}
}
return 0; // Still here ? ok so it worked :)
} // nsFileSpec::CrudeFileCopy_DoCopy
//----------------------------------------------------------------------------------------
static int CrudeFileCopy(const char* in, const char* out)
//----------------------------------------------------------------------------------------
{
char buf[1024]; // Used as buffer for the copy loop
PRInt32 rbytes, wbytes; // Number of bytes read and written in copy loop
struct stat in_stat; // Stores informations from the stat syscall
int stat_result = -1, ret;
PRFileDesc * pFileDescIn, * pFileDescOut; // Src and dest pointers
// Check if the pointers to filenames are valid
NS_ASSERTION(in && out, "CrudeFileCopy should be called with pointers to filenames...");
// Check if the pointers are the same, if so, no need to copy A to A
if (in == out)
return 0;
// Check if content of the pointers are the sames, if so, no need to copy A to A
if (strcmp(in,out) == 0)
return 0;
// Retrieve the 'in' file attributes
stat_result = stat(in, &in_stat);
if(stat_result != 0)
{
// test if stat failed, it can happen if the file does not exist, is not
// readable or is not available ( can happen with NFS mounts )
return -1; // Return an error
}
// Open the input file for binary read
pFileDescIn = PR_Open(in, PR_RDONLY, 0444);
if (pFileDescIn == 0)
{
return -1; // Open failed, return an error
}
// Open the output file for binary write
pFileDescOut = PR_Open(out, PR_WRONLY | PR_CREATE_FILE, 0600);
if (pFileDescOut == 0)
{
// Open failed, need to close input file, then return an error
PR_Close(pFileDescOut); // Close the output file
return -1; // Open failed, return an error
}
// Copy the data
if (CrudeFileCopy_DoCopy(pFileDescIn, pFileDescOut, buf, sizeof(buf)) != 0)
{ // Error case
PR_Close(pFileDescOut); // Close output file
PR_Close(pFileDescIn); // Close input file
PR_Delete(out); // Destroy output file
return -1; // Return an error
}
// There is no need for error handling here. This should have worked, but even
// if it fails, the data are now copied to destination, thus there is no need
// for the function to fail on the input file error
PR_Close(pFileDescIn);
// It is better to call fsync and test return code before exiting to be sure
// data are actually written on disk. Data loss can happen with NFS mounts
if (PR_Sync(pFileDescOut) != PR_SUCCESS)
{ // Test if the fsync function succeeded
PR_Close(pFileDescOut); // Close output file
PR_Delete(out); // Destroy output file
return -1; // Return an error
}
// Copy is done, close both file
if (PR_Close(pFileDescOut) != PR_SUCCESS) // Close output file
{ // Output file was not closed :(
PR_Delete(out); // Destroy output file
return -1; // Return an error
}
ret = chmod(out, in_stat.st_mode & 0777); // Set the new file file mode
if (ret != 0) // Test if the chmod function succeeded
{
PR_Delete(out); // Destroy output file
return -1; // Return an error
}
return 0; // Still here ? ok so it worked :)
} // nsFileSpec::CrudeFileCopy
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::CopyToDir(const nsFileSpec& inParentDirectory) const
//----------------------------------------------------------------------------------------
{
// We can only copy into a directory, and (for now) can not copy entire directories
nsresult result = NS_FILE_FAILURE;
if (inParentDirectory.IsDirectory() && (! IsDirectory() ) )
{
char *leafname = GetLeafName();
nsSimpleCharString destPath(inParentDirectory.GetCString());
destPath += "/";
destPath += leafname;
nsCRT::free(leafname);
result = NS_FILE_RESULT(CrudeFileCopy(GetCString(), destPath));
}
return result;
} // nsFileSpec::CopyToDir
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::MoveToDir(const nsFileSpec& inNewParentDirectory)
//----------------------------------------------------------------------------------------
{
// We can only copy into a directory, and (for now) can not copy entire directories
nsresult result = NS_FILE_FAILURE;
if (inNewParentDirectory.IsDirectory() && !IsDirectory())
{
char *leafname = GetLeafName();
nsSimpleCharString destPath(inNewParentDirectory.GetCString());
destPath += "/";
destPath += leafname;
nsCRT::free(leafname);
result = NS_FILE_RESULT(CrudeFileCopy(GetCString(), (const char*)destPath));
if (result == NS_OK)
{
// cast to fix const-ness
((nsFileSpec*)this)->Delete(PR_FALSE);
*this = inNewParentDirectory + GetLeafName();
}
}
return result;
}
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::Execute(const char* inArgs ) const
//----------------------------------------------------------------------------------------
{
nsresult result = NS_FILE_FAILURE;
if (!mPath.IsEmpty() && !IsDirectory())
{
nsSimpleCharString fileNameWithArgs = mPath + " " + inArgs;
result = NS_FILE_RESULT(system(fileNameWithArgs));
}
return result;
} // nsFileSpec::Execute
//----------------------------------------------------------------------------------------
PRInt64 nsFileSpec::GetDiskSpaceAvailable() const
//----------------------------------------------------------------------------------------
{
PRInt64 bytes; /* XXX dougt needs to fix this */
LL_I2L(bytes , LONG_MAX); // initialize to all the space in the world?
#if defined(HAVE_SYS_STATFS_H) || defined(HAVE_SYS_STATVFS_H)
char curdir [MAXPATHLEN];
if (mPath.IsEmpty())
{
(void) getcwd(curdir, MAXPATHLEN);
if (!curdir)
return bytes; /* hope for the best as we did in cheddar */
}
else
sprintf(curdir, "%.200s", (const char*)mPath);
struct STATFS fs_buf;
#if defined(__QNX__) && !defined(HAVE_STATVFS) /* Maybe this should be handled differently? */
if (STATFS(curdir, &fs_buf, 0, 0) < 0)
#else
if (STATFS(curdir, &fs_buf) < 0)
#endif
return bytes; /* hope for the best as we did in cheddar */
#ifdef DEBUG_DISK_SPACE
printf("DiskSpaceAvailable: %d bytes\n",
fs_buf.f_bsize * (fs_buf.f_bavail - 1));
#endif
PRInt64 bsize,bavail;
LL_I2L( bsize, fs_buf.f_bsize );
LL_I2L( bavail, fs_buf.f_bavail - 1 );
LL_MUL( bytes, bsize, bavail );
return bytes;
#else
/*
** This platform doesn't have statfs or statvfs, so we don't have much
** choice but to "hope for the best as we did in cheddar".
*/
return bytes;
#endif /* HAVE_SYS_STATFS_H or HAVE_SYS_STATVFS_H */
} // nsFileSpec::GetDiskSpace()
//========================================================================================
// nsDirectoryIterator
//========================================================================================
//----------------------------------------------------------------------------------------
nsDirectoryIterator::nsDirectoryIterator(const nsFileSpec& inDirectory, PRBool resolveSymLinks)
//----------------------------------------------------------------------------------------
: mCurrent(inDirectory)
, mExists(PR_FALSE)
, mResoveSymLinks(resolveSymLinks)
, mStarting(inDirectory)
, mDir(nsnull)
{
mStarting += "sysygy"; // save off the starting directory
mCurrent += "sysygy"; // prepare the path for SetLeafName
mDir = opendir((const char*)nsFilePath(inDirectory));
++(*this);
} // nsDirectoryIterator::nsDirectoryIterator
//----------------------------------------------------------------------------------------
nsDirectoryIterator::~nsDirectoryIterator()
//----------------------------------------------------------------------------------------
{
if (mDir)
closedir(mDir);
} // nsDirectoryIterator::nsDirectoryIterator
//----------------------------------------------------------------------------------------
nsDirectoryIterator& nsDirectoryIterator::operator ++ ()
//----------------------------------------------------------------------------------------
{
mExists = PR_FALSE;
if (!mDir)
return *this;
const char dot[] = ".";
const char dotdot[] = "..";
struct dirent* entry = readdir(mDir);
if (entry && strcmp(entry->d_name, dot) == 0)
entry = readdir(mDir);
if (entry && strcmp(entry->d_name, dotdot) == 0)
entry = readdir(mDir);
if (entry)
{
mExists = PR_TRUE;
mCurrent = mStarting; // restore mCurrent to be the starting directory. ResolveSymlink() may have taken us to another directory
mCurrent.SetLeafName(entry->d_name);
if (mResoveSymLinks)
{
PRBool ignore;
mCurrent.ResolveSymlink(ignore);
}
}
return *this;
} // nsDirectoryIterator::operator ++
//----------------------------------------------------------------------------------------
nsDirectoryIterator& nsDirectoryIterator::operator -- ()
//----------------------------------------------------------------------------------------
{
return ++(*this); // can't do it backwards.
} // nsDirectoryIterator::operator --
// Convert a UTF-8 string to a UTF-16 string while normalizing to
// Normalization Form C (composed Unicode). We need this because
// Mac OS X file system uses NFD (Normalization Form D : decomposed Unicode)
// while most other OS', server-side programs usually expect NFC.
#ifdef XP_MACOSX
typedef void (*UnicodeNormalizer) (CFMutableStringRef, CFStringNormalizationForm);
static void CopyUTF8toUTF16NFC(const nsACString& aSrc, nsAString& aResult)
{
static PRBool sChecked = PR_FALSE;
static UnicodeNormalizer sUnicodeNormalizer = NULL;
// CFStringNormalize was not introduced until Mac OS 10.2
if (!sChecked) {
CFBundleRef carbonBundle =
CFBundleGetBundleWithIdentifier(CFSTR("com.apple.Carbon"));
if (carbonBundle)
sUnicodeNormalizer = (UnicodeNormalizer)
::CFBundleGetFunctionPointerForName(carbonBundle,
CFSTR("CFStringNormalize"));
sChecked = PR_TRUE;
}
if (!sUnicodeNormalizer) { // OS X 10.1 or earlier
CopyUTF8toUTF16(aSrc, aResult);
return;
}
const nsAFlatCString &inFlatSrc = PromiseFlatCString(aSrc);
// The number of 16bit code units in a UTF-16 string will never be
// larger than the number of bytes in the corresponding UTF-8 string.
CFMutableStringRef inStr =
::CFStringCreateMutable(NULL, inFlatSrc.Length());
if (!inStr) {
CopyUTF8toUTF16(aSrc, aResult);
return;
}
::CFStringAppendCString(inStr, inFlatSrc.get(), kCFStringEncodingUTF8);
sUnicodeNormalizer(inStr, kCFStringNormalizationFormC);
CFIndex length = CFStringGetLength(inStr);
const UniChar* chars = CFStringGetCharactersPtr(inStr);
if (chars)
aResult.Assign(chars, length);
else {
nsAutoTArray<UniChar, 512> buffer;
if (buffer.SetLength(length)) {
CFStringGetCharacters(inStr, CFRangeMake(0, length), buffer.Elements());
aResult.Assign(buffer.Elements(), length);
}
else
CopyUTF8toUTF16(aSrc, aResult);
}
CFRelease(inStr);
}
#endif
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