blob: 7b0d34871a2d3ecd93dcb39af5cadcc1db8fefd2 [file] [log] [blame]
/*
* libjingle
* Copyright 2004--2006, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <cassert>
#ifdef WIN32
#include "talk/base/win32.h"
#endif
#include "talk/base/pathutils.h"
#include "talk/base/fileutils.h"
#include "talk/base/stringutils.h"
#include "talk/base/stream.h"
#include "talk/base/unixfilesystem.h"
#include "talk/base/win32filesystem.h"
#ifndef WIN32
#define MAX_PATH 260
#endif
namespace talk_base {
//////////////////////////
// Directory Iterator //
//////////////////////////
// A DirectoryIterator is created with a given directory. It originally points
// to the first file in the directory, and can be advanecd with Next(). This
// allows you to get information about each file.
// Constructor
DirectoryIterator::DirectoryIterator()
#ifdef _WIN32
: handle_(INVALID_HANDLE_VALUE) {
#else
: dir_(NULL), dirent_(NULL) {
#endif
}
// Destructor
DirectoryIterator::~DirectoryIterator() {
#ifdef WIN32
if (handle_ != INVALID_HANDLE_VALUE)
::FindClose(handle_);
#else
if (dir_)
closedir(dir_);
#endif
}
// Starts traversing a directory.
// dir is the directory to traverse
// returns true if the directory exists and is valid
bool DirectoryIterator::Iterate(const Pathname &dir) {
directory_ = dir.pathname();
#ifdef WIN32
if (handle_ != INVALID_HANDLE_VALUE)
::FindClose(handle_);
std::string d = dir.pathname() + '*';
handle_ = ::FindFirstFile(ToUtf16(d).c_str(), &data_);
if (handle_ == INVALID_HANDLE_VALUE)
return false;
#else
if (dir_ != NULL)
closedir(dir_);
dir_ = ::opendir(directory_.c_str());
if (dir_ == NULL)
return false;
dirent_ = readdir(dir_);
if (dirent_ == NULL)
return false;
if (::stat(std::string(directory_ + Name()).c_str(), &stat_) != 0)
return false;
#endif
return true;
}
// Advances to the next file
// returns true if there were more files in the directory.
bool DirectoryIterator::Next() {
#ifdef WIN32
return ::FindNextFile(handle_, &data_) == TRUE;
#else
dirent_ = ::readdir(dir_);
if (dirent_ == NULL)
return false;
return ::stat(std::string(directory_ + Name()).c_str(), &stat_) == 0;
#endif
}
// returns true if the file currently pointed to is a directory
bool DirectoryIterator::IsDirectory() const {
#ifdef WIN32
return (data_.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != FALSE;
#else
return S_ISDIR(stat_.st_mode);
#endif
}
// returns the name of the file currently pointed to
std::string DirectoryIterator::Name() const {
#ifdef WIN32
return ToUtf8(data_.cFileName);
#else
assert(dirent_ != NULL);
return dirent_->d_name;
#endif
}
// returns the size of the file currently pointed to
size_t DirectoryIterator::FileSize() const {
#ifndef WIN32
return stat_.st_size;
#else
return data_.nFileSizeLow;
#endif
}
// returns the last modified time of this file
time_t DirectoryIterator::FileModifyTime() const {
#ifdef WIN32
time_t val;
FileTimeToUnixTime(data_.ftLastWriteTime, &val);
return val;
#else
return stat_.st_mtime;
#endif
}
FilesystemInterface* Filesystem::default_filesystem_ = NULL;
FilesystemInterface *Filesystem::EnsureDefaultFilesystem() {
if (!default_filesystem_) {
#ifdef WIN32
default_filesystem_ = new Win32Filesystem();
#else
default_filesystem_ = new UnixFilesystem();
#endif
}
return default_filesystem_;
}
bool FilesystemInterface::CopyFolder(const Pathname &old_path,
const Pathname &new_path) {
bool success = true;
VERIFY(IsFolder(old_path));
Pathname new_dir;
new_dir.SetFolder(new_path.pathname());
Pathname old_dir;
old_dir.SetFolder(old_path.pathname());
if (!CreateFolder(new_dir))
return false;
DirectoryIterator *di = IterateDirectory();
if (!di)
return false;
if (di->Iterate(old_dir.pathname())) {
do {
if (di->Name() == "." || di->Name() == "..")
continue;
Pathname source;
Pathname dest;
source.SetFolder(old_dir.pathname());
dest.SetFolder(new_path.pathname());
source.SetFilename(di->Name());
dest.SetFilename(di->Name());
if (!CopyFileOrFolder(source, dest))
success = false;
} while (di->Next());
}
delete di;
return success;
}
bool FilesystemInterface::DeleteFolderContents(const Pathname &folder) {
bool success = true;
VERIFY(IsFolder(folder));
DirectoryIterator *di = IterateDirectory();
if (!di)
return false;
if (di->Iterate(folder)) {
do {
if (di->Name() == "." || di->Name() == "..")
continue;
Pathname subdir;
subdir.SetFolder(folder.pathname());
if (di->IsDirectory()) {
subdir.AppendFolder(di->Name());
if (!DeleteFolderAndContents(subdir)) {
success = false;
}
} else {
subdir.SetFilename(di->Name());
if (!DeleteFile(subdir)) {
success = false;
}
}
} while (di->Next());
}
delete di;
return success;
}
bool FilesystemInterface::CleanAppTempFolder() {
Pathname path;
if (!GetAppTempFolder(&path))
return false;
if (IsAbsent(path))
return true;
if (!IsTemporaryPath(path)) {
ASSERT(false);
return false;
}
return DeleteFolderContents(path);
}
Pathname Filesystem::GetCurrentDirectory() {
return EnsureDefaultFilesystem()->GetCurrentDirectory();
}
bool CreateUniqueFile(Pathname& path, bool create_empty) {
LOG(LS_INFO) << "Path " << path.pathname() << std::endl;
// If no folder is supplied, use the temporary folder
if (path.folder().empty()) {
Pathname temporary_path;
if (!Filesystem::GetTemporaryFolder(temporary_path, true, NULL)) {
printf("Get temp failed\n");
return false;
}
path.SetFolder(temporary_path.pathname());
}
// If no filename is supplied, use a temporary name
if (path.filename().empty()) {
std::string folder(path.folder());
std::string filename = Filesystem::TempFilename(folder, "gt");
path.SetPathname(filename);
if (!create_empty) {
Filesystem::DeleteFile(path.pathname());
}
return true;
}
// Otherwise, create a unique name based on the given filename
// foo.txt -> foo-N.txt
const std::string basename = path.basename();
const size_t MAX_VERSION = 100;
size_t version = 0;
while (version < MAX_VERSION) {
std::string pathname = path.pathname();
if (!Filesystem::IsFile(pathname)) {
if (create_empty) {
FileStream* fs = Filesystem::OpenFile(pathname, "w");
delete fs;
}
return true;
}
version += 1;
char version_base[MAX_PATH];
sprintfn(version_base, ARRAY_SIZE(version_base), "%s-%u",
basename.c_str(), version);
path.SetBasename(version_base);
}
return true;
}
} // namespace talk_base