Image::AutoPtr ImageFactory::create(Image::Type type,
const std::string& path)
{
FileIo *fileIo = new FileIo(path);
BasicIo::AutoPtr io(fileIo);
// Create or overwrite the file, then close it
if (fileIo->open("w+b") != 0) return Image::AutoPtr();
fileIo->close();
return create(type, io);
}
void FileIo::transfer(BasicIo& src)
{
const bool wasOpen = (fp_ != 0);
const std::string lastMode(openMode_);
FileIo *fileIo = dynamic_cast<FileIo*>(&src);
if (fileIo) {
// Optimization if src is another instance of FileIo
fileIo->close();
// Check if the file can be written to, if it already exists
if (open("w+b") != 0) {
// Remove the (temporary) file
std::remove(fileIo->path_.c_str());
throw Error(10, path_, "w+b", strError());
}
close();
struct stat buf;
if (::stat(path_.c_str(), &buf) == -1) {
throw Error(2, path_, strError(), "stat");
}
// MSVCRT rename that does not overwrite existing files
if (fileExists(path_) && std::remove(path_.c_str()) != 0) {
throw Error(2, path_, strError(), "std::remove");
}
if (std::rename(fileIo->path_.c_str(), path_.c_str()) == -1) {
throw Error(17, fileIo->path_, path_, strError());
}
std::remove(fileIo->path_.c_str());
// Set original file permissions
if (::chmod(path_.c_str(), buf.st_mode) == -1) {
throw Error(2, fileIo->path_, strError(), "chmod");
}
}
else {
// Generic handling, reopen both to reset to start
if (open("w+b") != 0) {
throw Error(10, path_, "w+b", strError());
}
if (src.open() != 0) {
throw Error(9, src.path(), strError());
}
write(src);
src.close();
}
if (wasOpen) {
if (open(lastMode) != 0) {
throw Error(10, path_, lastMode, strError());
}
}
else close();
if (error() || src.error()) throw Error(18, path_, strError());
}
void FileIo::transfer(BasicIo& src)
{
const bool wasOpen = (p_->fp_ != 0);
const std::string lastMode(p_->openMode_);
FileIo *fileIo = dynamic_cast<FileIo*>(&src);
if (fileIo) {
// Optimization if src is another instance of FileIo
fileIo->close();
// Check if the file can be written to, if it already exists
if (open("a+b") != 0) {
// Remove the (temporary) file
#ifdef EXV_UNICODE_PATH
if (fileIo->p_->wpMode_ == Impl::wpUnicode) {
::_wremove(fileIo->wpath().c_str());
}
else
#endif
{
::remove(fileIo->path().c_str());
}
#ifdef EXV_UNICODE_PATH
if (p_->wpMode_ == Impl::wpUnicode) {
throw WError(10, wpath(), "a+b", strError().c_str());
}
else
#endif
{
throw Error(10, path(), "a+b", strError());
}
}
close();
bool statOk = true;
mode_t origStMode = 0;
std::string spf;
char* pf = 0;
#ifdef EXV_UNICODE_PATH
std::wstring wspf;
wchar_t* wpf = 0;
if (p_->wpMode_ == Impl::wpUnicode) {
wspf = wpath();
wpf = const_cast<wchar_t*>(wspf.c_str());
}
else
#endif
{
spf = path();
pf = const_cast<char*>(spf.c_str());
}
// Get the permissions of the file, or linked-to file, on platforms which have lstat
#ifdef EXV_HAVE_LSTAT
# ifdef EXV_UNICODE_PATH
# error EXV_UNICODE_PATH and EXV_HAVE_LSTAT are not compatible. Stop.
# endif
struct stat buf1;
if (::lstat(pf, &buf1) == -1) {
statOk = false;
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << Error(2, pf, strError(), "::lstat") << "\n";
#endif
}
origStMode = buf1.st_mode;
DataBuf lbuf; // So that the allocated memory is freed. Must have same scope as pf
// In case path() is a symlink, get the path of the linked-to file
if (statOk && S_ISLNK(buf1.st_mode)) {
lbuf.alloc(buf1.st_size + 1);
memset(lbuf.pData_, 0x0, lbuf.size_);
pf = reinterpret_cast<char*>(lbuf.pData_);
if (::readlink(path().c_str(), pf, lbuf.size_ - 1) == -1) {
throw Error(2, path(), strError(), "readlink");
}
// We need the permissions of the file, not the symlink
if (::stat(pf, &buf1) == -1) {
statOk = false;
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << Error(2, pf, strError(), "::stat") << "\n";
#endif
}
origStMode = buf1.st_mode;
}
#else // EXV_HAVE_LSTAT
Impl::StructStat buf1;
if (p_->stat(buf1) == -1) {
statOk = false;
}
origStMode = buf1.st_mode;
#endif // !EXV_HAVE_LSTAT
// MSVCRT rename that does not overwrite existing files
#ifdef EXV_UNICODE_PATH
if (p_->wpMode_ == Impl::wpUnicode) {
if (fileExists(wpf) && ::_wremove(wpf) != 0) {
throw WError(2, wpf, strError().c_str(), "::_wremove");
}
if (::_wrename(fileIo->wpath().c_str(), wpf) == -1) {
throw WError(17, fileIo->wpath(), wpf, strError().c_str());
}
::_wremove(fileIo->wpath().c_str());
// Check permissions of new file
struct _stat buf2;
if (statOk && ::_wstat(wpf, &buf2) == -1) {
statOk = false;
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << Error(2, wpf, strError(), "::_wstat") << "\n";
#endif
}
if (statOk && origStMode != buf2.st_mode) {
// Set original file permissions
if (::_wchmod(wpf, origStMode) == -1) {
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << Error(2, wpf, strError(), "::_wchmod") << "\n";
#endif
}
}
} // if (p_->wpMode_ == Impl::wpUnicode)
else
#endif // EXV_UNICODE_PATH
{
if (fileExists(pf) && ::remove(pf) != 0) {
throw Error(2, pf, strError(), "::remove");
}
if (::rename(fileIo->path().c_str(), pf) == -1) {
throw Error(17, fileIo->path(), pf, strError());
}
::remove(fileIo->path().c_str());
// Check permissions of new file
struct stat buf2;
if (statOk && ::stat(pf, &buf2) == -1) {
statOk = false;
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << Error(2, pf, strError(), "::stat") << "\n";
#endif
}
if (statOk && origStMode != buf2.st_mode) {
// Set original file permissions
if (::chmod(pf, origStMode) == -1) {
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << Error(2, pf, strError(), "::chmod") << "\n";
#endif
}
}
}
} // if (fileIo)
else {
// Generic handling, reopen both to reset to start
if (open("w+b") != 0) {
#ifdef EXV_UNICODE_PATH
if (p_->wpMode_ == Impl::wpUnicode) {
throw WError(10, wpath(), "w+b", strError().c_str());
}
else
#endif
{
throw Error(10, path(), "w+b", strError());
}
}
if (src.open() != 0) {
#ifdef EXV_UNICODE_PATH
if (p_->wpMode_ == Impl::wpUnicode) {
throw WError(9, src.wpath(), strError().c_str());
}
else
#endif
{
throw Error(9, src.path(), strError());
}
}
write(src);
src.close();
}
if (wasOpen) {
if (open(lastMode) != 0) {
#ifdef EXV_UNICODE_PATH
if (p_->wpMode_ == Impl::wpUnicode) {
throw WError(10, wpath(), lastMode.c_str(), strError().c_str());
}
else
#endif
{
throw Error(10, path(), lastMode, strError());
}
}
}
else close();
if (error() || src.error()) {
#ifdef EXV_UNICODE_PATH
if (p_->wpMode_ == Impl::wpUnicode) {
throw WError(18, wpath(), strError().c_str());
}
else
#endif
{
throw Error(18, path(), strError());
}
}
} // FileIo::transfer
void FileIo::transfer(BasicIo& src)
{
const bool wasOpen = (fp_ != 0);
const std::string lastMode(openMode_);
FileIo *fileIo = dynamic_cast<FileIo*>(&src);
if (fileIo) {
// Optimization if src is another instance of FileIo
fileIo->close();
// Check if the file can be written to, if it already exists
if (open("w+b") != 0) {
// Remove the (temporary) file
std::remove(fileIo->path_.c_str());
throw Error(10, path_, "w+b", strError());
}
close();
bool statOk = true;
struct stat buf1;
char* pf = const_cast<char*>(path_.c_str());
#ifdef EXV_HAVE_LSTAT
if (::lstat(pf, &buf1) == -1) {
statOk = false;
#ifndef SUPPRESS_WARNINGS
std::cerr << "Warning: " << Error(2, pf, strError(), "lstat") << "\n";
#endif
}
DataBuf lbuf; // So that the allocated memory is freed. Must have same scope as pf
// In case path_ is a symlink, get the path of the linked-to file
if (statOk && S_ISLNK(buf1.st_mode)) {
lbuf.alloc(buf1.st_size + 1);
memset(lbuf.pData_, 0x0, lbuf.size_);
pf = reinterpret_cast<char*>(lbuf.pData_);
if (readlink(path_.c_str(), pf, lbuf.size_ - 1) == -1) {
throw Error(2, path_, strError(), "readlink");
}
// We need the permissions of the file, not the symlink
if (::stat(pf, &buf1) == -1) {
statOk = false;
#ifndef SUPPRESS_WARNINGS
std::cerr << "Warning: " << Error(2, pf, strError(), "stat") << "\n";
#endif
}
}
#else
if (::stat(pf, &buf1) == -1) {
statOk = false;
#ifndef SUPPRESS_WARNINGS
std::cerr << "Warning: " << Error(2, pf, strError(), "stat") << "\n";
#endif
}
#endif // !EXV_HAVE_LSTAT
// MSVCRT rename that does not overwrite existing files
if (fileExists(pf) && std::remove(pf) != 0) {
throw Error(2, pf, strError(), "std::remove");
}
if (std::rename(fileIo->path_.c_str(), pf) == -1) {
throw Error(17, fileIo->path_, pf, strError());
}
std::remove(fileIo->path_.c_str());
// Check permissions of new file
struct stat buf2;
if (statOk && ::stat(pf, &buf2) == -1) {
statOk = false;
#ifndef SUPPRESS_WARNINGS
std::cerr << "Warning: " << Error(2, pf, strError(), "stat") << "\n";
#endif
}
if (statOk && buf1.st_mode != buf2.st_mode) {
// Set original file permissions
if (::chmod(pf, buf1.st_mode) == -1) {
#ifndef SUPPRESS_WARNINGS
std::cerr << "Warning: " << Error(2, pf, strError(), "chmod") << "\n";
#endif
}
}
}
else {
// Generic handling, reopen both to reset to start
if (open("w+b") != 0) {
throw Error(10, path_, "w+b", strError());
}
if (src.open() != 0) {
throw Error(9, src.path(), strError());
}
write(src);
src.close();
}
if (wasOpen) {
if (open(lastMode) != 0) {
throw Error(10, path_, lastMode, strError());
}
}
else close();
if (error() || src.error()) throw Error(18, path_, strError());
}