#include "serialise.hh" #include "util.hh" #include #include namespace nix { BufferedSink::~BufferedSink() { /* We can't call flush() here, because C++ for some insane reason doesn't allow you to call virtual methods from a destructor. */ assert(!bufPos); delete[] buffer; } void BufferedSink::operator () (const unsigned char * data, size_t len) { if (!buffer) buffer = new unsigned char[bufSize]; while (len) { /* Optimisation: bypass the buffer if the data exceeds the buffer size. */ if (bufPos + len >= bufSize) { flush(); write(data, len); break; } /* Otherwise, copy the bytes to the buffer. Flush the buffer when it's full. */ size_t n = bufPos + len > bufSize ? bufSize - bufPos : len; memcpy(buffer + bufPos, data, n); data += n; bufPos += n; len -= n; if (bufPos == bufSize) flush(); } } void BufferedSink::flush() { if (bufPos == 0) return; size_t n = bufPos; bufPo
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