}
/*}}}*/
+struct APT_HIDDEN simple_buffer { /*{{{*/
+ static constexpr size_t buffersize_max = 4096;
+ unsigned long long bufferstart = 0;
+ unsigned long long bufferend = 0;
+ char buffer[buffersize_max];
+
+ const char *get() const { return buffer + bufferstart; }
+ char *get() { return buffer + bufferstart; }
+ bool empty() const { return bufferend <= bufferstart; }
+ bool full() const { return bufferend == buffersize_max; }
+ unsigned long long size() const { return bufferend-bufferstart; }
+ void reset() { bufferend = bufferstart = 0; }
+ ssize_t read(void *to, unsigned long long requested_size) APT_MUSTCHECK
+ {
+ if (size() < requested_size)
+ requested_size = size();
+ memcpy(to, buffer + bufferstart, requested_size);
+ bufferstart += requested_size;
+ if (bufferstart == bufferend)
+ bufferstart = bufferend = 0;
+ return requested_size;
+ }
+ ssize_t write(const void *from, unsigned long long requested_size) APT_MUSTCHECK
+ {
+ if (buffersize_max - size() < requested_size)
+ requested_size = buffersize_max - size();
+ memcpy(buffer + bufferend, from, requested_size);
+ bufferend += requested_size;
+ if (bufferstart == bufferend)
+ bufferstart = bufferend = 0;
+ return requested_size;
+ }
+};
+ /*}}}*/
+
class APT_HIDDEN FileFdPrivate { /*{{{*/
+ friend class BufferedWriteFileFdPrivate;
protected:
FileFd * const filefd;
- struct simple_buffer {
- static constexpr size_t buffersize_max = 4096;
- unsigned long long bufferstart = 0;
- unsigned long long bufferend = 0;
- char buffer[buffersize_max];
-
- char *get() { return buffer + bufferstart; }
- bool empty() { return bufferend <= bufferstart; }
- unsigned long long size() { return bufferend-bufferstart; }
- void reset() { bufferend = bufferstart = 0; }
- ssize_t read(void *to, unsigned long long requested_size) APT_MUSTCHECK
- {
- if (size() < requested_size)
- requested_size = size();
- memcpy(to, buffer + bufferstart, requested_size);
- bufferstart += requested_size;
- if (bufferstart == bufferend)
- bufferstart = bufferend = 0;
- return requested_size;
- }
- } buffer;
-public:
+ simple_buffer buffer;
int compressed_fd;
pid_t compressor_pid;
bool is_pipe;
APT::Configuration::Compressor compressor;
unsigned int openmode;
unsigned long long seekpos;
+public:
+
explicit FileFdPrivate(FileFd * const pfilefd) : filefd(pfilefd),
compressed_fd(-1), compressor_pid(-1), is_pipe(false),
openmode(0), seekpos(0) {};
+ virtual APT::Configuration::Compressor get_compressor() const
+ {
+ return compressor;
+ }
+ virtual void set_compressor(APT::Configuration::Compressor const &compressor)
+ {
+ this->compressor = compressor;
+ }
+ virtual unsigned int get_openmode() const
+ {
+ return openmode;
+ }
+ virtual void set_openmode(unsigned int openmode)
+ {
+ this->openmode = openmode;
+ }
+ virtual bool get_is_pipe() const
+ {
+ return is_pipe;
+ }
+ virtual void set_is_pipe(bool is_pipe)
+ {
+ this->is_pipe = is_pipe;
+ }
+ virtual unsigned long long get_seekpos() const
+ {
+ return seekpos;
+ }
+ virtual void set_seekpos(unsigned long long seekpos)
+ {
+ this->seekpos = seekpos;
+ }
virtual bool InternalOpen(int const iFd, unsigned int const Mode) = 0;
ssize_t InternalRead(void * To, unsigned long long Size)
{
if (unlikely(Size == 0))
return nullptr;
+ // Read one byte less than buffer size to have space for trailing 0.
--Size;
- To[0] = '\0';
- if (unlikely(Size == 0))
- return To;
+
char * const InitialTo = To;
- do {
+ while (Size > 0) {
if (buffer.empty() == true)
{
buffer.reset();
Size -= actualread;
if (newline != nullptr)
break;
- } while (Size > 0);
+ }
*To = '\0';
return InitialTo;
}
+ virtual bool InternalFlush()
+ {
+ return true;
+ }
virtual ssize_t InternalWrite(void const * const From, unsigned long long const Size) = 0;
virtual bool InternalWriteError() { return filefd->FileFdErrno("write",_("Write error")); }
virtual bool InternalSeek(unsigned long long const To)
virtual ~FileFdPrivate() {}
};
/*}}}*/
+class APT_HIDDEN BufferedWriteFileFdPrivate : public FileFdPrivate { /*{{{*/
+protected:
+ FileFdPrivate *wrapped;
+ simple_buffer writebuffer;
+
+public:
+
+ explicit BufferedWriteFileFdPrivate(FileFdPrivate *Priv) :
+ FileFdPrivate(Priv->filefd), wrapped(Priv) {};
+
+ virtual APT::Configuration::Compressor get_compressor() const override
+ {
+ return wrapped->get_compressor();
+ }
+ virtual void set_compressor(APT::Configuration::Compressor const &compressor) override
+ {
+ return wrapped->set_compressor(compressor);
+ }
+ virtual unsigned int get_openmode() const override
+ {
+ return wrapped->get_openmode();
+ }
+ virtual void set_openmode(unsigned int openmode) override
+ {
+ return wrapped->set_openmode(openmode);
+ }
+ virtual bool get_is_pipe() const override
+ {
+ return wrapped->get_is_pipe();
+ }
+ virtual void set_is_pipe(bool is_pipe) override
+ {
+ FileFdPrivate::set_is_pipe(is_pipe);
+ wrapped->set_is_pipe(is_pipe);
+ }
+ virtual unsigned long long get_seekpos() const override
+ {
+ return wrapped->get_seekpos();
+ }
+ virtual void set_seekpos(unsigned long long seekpos) override
+ {
+ return wrapped->set_seekpos(seekpos);
+ }
+ virtual bool InternalOpen(int const iFd, unsigned int const Mode) override
+ {
+ if (InternalFlush() == false)
+ return false;
+ return wrapped->InternalOpen(iFd, Mode);
+ }
+ virtual ssize_t InternalUnbufferedRead(void * const To, unsigned long long const Size) override
+ {
+ if (InternalFlush() == false)
+ return -1;
+ return wrapped->InternalUnbufferedRead(To, Size);
+
+ }
+ virtual bool InternalReadError() override
+ {
+ return wrapped->InternalReadError();
+ }
+ virtual char * InternalReadLine(char * To, unsigned long long Size) override
+ {
+ if (InternalFlush() == false)
+ return nullptr;
+ return wrapped->InternalReadLine(To, Size);
+ }
+ virtual bool InternalFlush() override
+ {
+ while (writebuffer.empty() == false) {
+ auto written = wrapped->InternalWrite(writebuffer.get(),
+ writebuffer.size());
+ // Ignore interrupted syscalls
+ if (written < 0 && errno == EINTR)
+ continue;
+ if (written < 0)
+ return false;
+
+ writebuffer.bufferstart += written;
+ }
+
+ writebuffer.reset();
+ return true;
+ }
+ virtual ssize_t InternalWrite(void const * const From, unsigned long long const Size) override
+ {
+ size_t written = 0;
+
+ while (written < Size) {
+ auto buffered = writebuffer.write(static_cast<char const*>(From) + written, Size - written);
+
+ written += buffered;
+
+ if (writebuffer.full() && InternalFlush() == false)
+ return -1;
+ }
+
+ return written;
+ }
+ virtual bool InternalWriteError()
+ {
+ return wrapped->InternalWriteError();
+ }
+ virtual bool InternalSeek(unsigned long long const To)
+ {
+ if (InternalFlush() == false)
+ return false;
+ return wrapped->InternalSeek(To);
+ }
+ virtual bool InternalSkip(unsigned long long Over)
+ {
+ if (InternalFlush() == false)
+ return false;
+ return wrapped->InternalSkip(Over);
+ }
+ virtual bool InternalTruncate(unsigned long long const Size)
+ {
+ if (InternalFlush() == false)
+ return false;
+ return wrapped->InternalTruncate(Size);
+ }
+ virtual unsigned long long InternalTell()
+ {
+ if (InternalFlush() == false)
+ return -1;
+ return wrapped->InternalTell();
+ }
+ virtual unsigned long long InternalSize()
+ {
+ if (InternalFlush() == false)
+ return -1;
+ return wrapped->InternalSize();
+ }
+ virtual bool InternalClose(std::string const &FileName)
+ {
+ return wrapped->InternalClose(FileName);
+ }
+ virtual bool InternalAlwaysAutoClose() const
+ {
+ return wrapped->InternalAlwaysAutoClose();
+ }
+ virtual ~BufferedWriteFileFdPrivate()
+ {
+ delete wrapped;
+ }
+};
+ /*}}}*/
class APT_HIDDEN GzipFileFdPrivate: public FileFdPrivate { /*{{{*/
#ifdef HAVE_ZLIB
public:
SetCloseExec(Pipe[J],true);
compressed_fd = filefd->iFd;
- is_pipe = true;
+ set_is_pipe(true);
if (Comp == true)
filefd->iFd = Pipe[1];
else
d = new PipedFileFdPrivate(this);
- d->openmode = Mode;
- d->compressor = compressor;
+ if (Mode & BufferedWrite)
+ d = new BufferedWriteFileFdPrivate(d);
+
+ d->set_openmode(Mode);
+ d->set_compressor(compressor);
if ((Flags & AutoClose) != AutoClose && d->InternalAlwaysAutoClose())
{
// Need to duplicate fd here or gz/bz2 close for cleanup will close the fd as well
To = (char *)To + Res;
Size -= Res;
if (d != NULL)
- d->seekpos += Res;
+ d->set_seekpos(d->get_seekpos() + Res);
if (Actual != 0)
*Actual += Res;
}
return d->InternalReadLine(To, Size);
}
/*}}}*/
+// FileFd::Flush - Flush the file /*{{{*/
+bool FileFd::Flush()
+{
+ if (d == nullptr)
+ return true;
+
+ return d->InternalFlush();
+}
+ /*}}}*/
// FileFd::Write - Write to the file /*{{{*/
bool FileFd::Write(const void *From,unsigned long long Size)
{
From = (char const *)From + Res;
Size -= Res;
if (d != NULL)
- d->seekpos += Res;
+ d->set_seekpos(d->get_seekpos() + Res);
}
if (Size == 0)
off_t const Res = d->InternalTell();
if (Res == (off_t)-1)
FileFdErrno("lseek","Failed to determine the current file position");
- d->seekpos = Res;
+ d->set_seekpos(Res);
return Res;
}
/*}}}*/
static bool StatFileFd(char const * const msg, int const iFd, std::string const &FileName, struct stat &Buf, FileFdPrivate * const d) /*{{{*/
{
- bool ispipe = (d != NULL && d->is_pipe == true);
+ bool ispipe = (d != NULL && d->get_is_pipe() == true);
if (ispipe == false)
{
if (fstat(iFd,&Buf) != 0)
// we set it here, too, as we get the info here for free
// in theory the Open-methods should take care of it already
if (d != NULL)
- d->is_pipe = true;
+ d->set_is_pipe(true);
if (stat(FileName.c_str(), &Buf) != 0)
return _error->Errno("fstat", "Unable to determine %s for file %s", msg, FileName.c_str());
}
/* */
bool FileFd::Close()
{
+ if (Flush() == false)
+ return false;
if (iFd == -1)
return true;
projects / apt.git / blobdiff