40b3f64b55
* Some refactoring: put the NAR archive integer/string serialisation code in a separate file so it can be reused by the worker protocol implementation.
71 lines
1.4 KiB
C++
71 lines
1.4 KiB
C++
#ifndef __SERIALISE_H
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#define __SERIALISE_H
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#include "types.hh"
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namespace nix {
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/* Abstract destination of binary data. */
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struct Sink
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{
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virtual ~Sink() { }
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virtual void operator () (const unsigned char * data, unsigned int len) = 0;
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};
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/* Abstract source of binary data. */
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struct Source
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{
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virtual ~Source() { }
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/* The callee should store exactly *len bytes in the buffer
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pointed to by data. It should block if that much data is not
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yet available, or throw an error if it is not going to be
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available. */
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virtual void operator () (unsigned char * data, unsigned int len) = 0;
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};
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/* A sink that writes data to a file descriptor. */
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struct FdSink : Sink
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{
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int fd;
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FdSink(int fd)
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{
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this->fd = fd;
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}
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void operator () (const unsigned char * data, unsigned int len);
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};
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/* A source that reads data from a file descriptor. */
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struct FdSource : Source
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{
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int fd;
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FdSource(int fd)
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{
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this->fd = fd;
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}
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void operator () (unsigned char * data, unsigned int len);
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};
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void writePadding(unsigned int len, Sink & sink);
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void writeInt(unsigned int n, Sink & sink);
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void writeString(const string & s, Sink & sink);
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void readPadding(unsigned int len, Source & source);
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unsigned int readInt(Source & source);
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string readString(Source & source);
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}
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#endif /* !__SERIALISE_H */
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