#pragma once #include "types.hh" namespace nix { /* Abstract destination of binary data. */ struct Sink { virtual ~Sink() { } virtual void operator () (const unsigned char * data, size_t len) = 0; }; /* A buffered abstract sink. */ struct BufferedSink : Sink { size_t bufSize, bufPos; unsigned char * buffer; BufferedSink(size_t bufSize = 32 * 1024) : bufSize(bufSize), bufPos(0), buffer(0) { } ~BufferedSink(); void operator () (const unsigned char * data, size_t len); void flush(); virtual void write(const unsigned char * data, size_t len) = 0; }; /* Abstract source of binary data. */ struct Source { virtual ~Source() { } /* Store exactly ‘len’ bytes in the buffer pointed to by ‘data’. It blocks until all the requested data is available, or throws an error if it is not going to be available. */ void operator () (unsigned char * data, size_t len); /* Store up to ‘len’ in the buffer pointed to by ‘data’, and return the number of bytes stored. If blocks until at least one byte is available. */ virtual size_t read(unsigned char * data, size_t len) = 0; }; /* A buffered abstract source. */ struct BufferedSource : Source { size_t bufSize, bufPosIn, bufPosOut; unsigned char * buffer; BufferedSource(size_t bufSize = 32 * 1024) : bufSize(bufSize), bufPosIn(0), bufPosOut(0), buffer(0) { } ~BufferedSource(); size_t read(unsigned char * data, size_t len); /* Underlying read call, to be overridden. */ virtual size_t readUnbuffered(unsigned char * data, size_t len) = 0; bool hasData(); }; /* A sink that writes data to a file descriptor. */ struct FdSink : BufferedSink { int fd; bool warn; size_t written; FdSink() : fd(-1), warn(false), written(0) { } FdSink(int fd) : fd(fd), warn(false), written(0) { } ~FdSink(); void write(const unsigned char * data, size_t len); }; /* A source that reads data from a file descriptor. */ struct FdSource : BufferedSource { int fd; FdSource() : fd(-1) { } FdSource(int fd) : fd(fd) { } size_t readUnbuffered(unsigned char * data, size_t len); }; /* A sink that writes data to a string. */ struct StringSink : Sink { string s; void operator () (const unsigned char * data, size_t len); }; /* A source that reads data from a string. */ struct StringSource : Source { const string & s; size_t pos; StringSource(const string & _s) : s(_s), pos(0) { } size_t read(unsigned char * data, size_t len); }; void writePadding(size_t len, Sink & sink); void writeInt(unsigned int n, Sink & sink); void writeLongLong(unsigned long long n, Sink & sink); void writeString(const unsigned char * buf, size_t len, Sink & sink); void writeString(const string & s, Sink & sink); template void writeStrings(const T & ss, Sink & sink); void readPadding(size_t len, Source & source); unsigned int readInt(Source & source); unsigned long long readLongLong(Source & source); size_t readString(unsigned char * buf, size_t max, Source & source); string readString(Source & source); template T readStrings(Source & source); MakeError(SerialisationError, Error) } gnu: Use invoke and return #t from all builders....Mark H Weaver 2018-03-20Correct name and Email for ng0....ng0 2018-02-27gnu: xfburn: Update to 0.5.5....Tobias Geerinckx-Rice 2018-02-16gnu: ristretto: Update to 0.8.2....Tobias Geerinckx-Rice 2018-02-01gnu: Add xfburn....ng0 2018-01-13gnu: xfce: Use HTTPS for xfce.org home pages....Tobias Geerinckx-Rice 2018-01-13gnu: xfce4-terminal: Update to 0.8.6....Tobias Geerinckx-Rice 2017-12-19gnu: xfce4-session: Disable (duplicate) Gtk+ icon cache generation....Danny Milosavljevic 2017-09-20gnu: Use 'modify-phases' syntax....Kei Kebreau 2017-08-29Update e-mail for Kei Kebreau....Kei Kebreau 2017-07-03gnu: xfce: Propagate search paths of 'xfce4-panel'....宋文武 2017-06-29gnu: libxfce4ui: Do not propagate gtk+-2....Ricardo Wurmus 2017-06-29gnu: xfce: Build union instead of propagating inputs....Ricardo Wurmus 2017-06-15gnu: Move desktop-file-utils to (gnu packages freedesktop)....Danny Milosavljevic 2017-04-26gnu: Add Xfce Notification Daemon....Petter 2017-01-15gnu: xfce4-terminal: Update to 0.8.3....Ricardo Wurmus