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More cleanup

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This commit is contained in:
Eelco Dolstra 2015-07-20 01:16:16 +02:00
parent 6bd2c7bb38
commit b3491c781c
9 changed files with 184 additions and 296 deletions
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43
src/libutil/serialise.hh
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@ -1,13 +1,14 @@
#pragma once
#include "types.hh"
#include "util.hh"
namespace nix {
/* Abstract destination of binary data. */
struct Sink
struct Sink
{
virtual ~Sink() { }
virtual void operator () (const unsigned char * data, size_t len) = 0;
@ -25,9 +26,9 @@ struct BufferedSink : Sink
~BufferedSink();
void operator () (const unsigned char * data, size_t len);
void flush();
virtual void write(const unsigned char * data, size_t len) = 0;
};
@ -36,7 +37,7 @@ struct BufferedSink : Sink
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. */
@ -58,9 +59,9 @@ struct BufferedSource : Source
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;
@ -78,7 +79,7 @@ struct FdSink : BufferedSink
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);
};
@ -107,21 +108,31 @@ 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);
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<class T> void writeStrings(const T & ss, Sink & sink);
Sink & operator << (Sink & out, unsigned int n);
Sink & operator << (Sink & out, const string & s);
Sink & operator << (Sink & out, const Strings & s);
Sink & operator << (Sink & out, const StringSet & s);
inline Sink & operator << (Sink & sink, uint64_t n)
{
unsigned char buf[8];
buf[0] = n & 0xff;
buf[1] = (n >> 8) & 0xff;
buf[2] = (n >> 16) & 0xff;
buf[3] = (n >> 24) & 0xff;
buf[4] = (n >> 32) & 0xff;
buf[5] = (n >> 40) & 0xff;
buf[6] = (n >> 48) & 0xff;
buf[7] = (n >> 56) & 0xff;
sink(buf, sizeof(buf));
return sink;
}
Sink & operator << (Sink & sink, const string & s);
Sink & operator << (Sink & sink, const Strings & s);
Sink & operator << (Sink & sink, const StringSet & s);
void readPadding(size_t len, Source & source);