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NarAccessor: Run in constant memory

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This commit is contained in:
Eelco Dolstra 2020-07-13 17:30:42 +02:00
parent fc84c358d9
commit 0a9da00a10
7 changed files with 57 additions and 37 deletions
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10
src/libutil/serialise.hh
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@ -179,17 +179,17 @@ struct TeeSink : Sink
};
/* Adapter class of a Source that saves all data read to `s'. */
/* Adapter class of a Source that saves all data read to a sink. */
struct TeeSource : Source
{
Source & orig;
ref<std::string> data;
TeeSource(Source & orig)
: orig(orig), data(make_ref<std::string>()) { }
Sink & sink;
TeeSource(Source & orig, Sink & sink)
: orig(orig), sink(sink) { }
size_t read(unsigned char * data, size_t len)
{
size_t n = orig.read(data, len);
this->data->append((const char *) data, n);
sink(data, len);
return n;
}
};