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#define XERR "memorybuf"
#include "memorybuf.ih"
// called when using e.g., file << memorystreamobj.rdbuf()
// overrides
int MemoryBuf::underflow()
{
if (
not (d_mode & ios::in) // reading not OK or
or // beyond the last written offset?
getOffset() >= d_bridge.writtenUntil()
)
return EOF; // then quit
d_bridge.load(); // load offset's segment
setg(d_bridge.beginPtr(), d_bridge.offsetPtr(), d_bridge.endReadPtr());
//xerr("offset " << d_bridge.offset() << " points to " <<
//(void *)d_bridge.beginPtr() << ", step = " <<
//(d_bridge.offsetPtr() - d_bridge.beginPtr()) << ", ch = " <<
//*d_bridge.beginPtr() << " and " << *d_bridge.offsetPtr() );
d_last = READ;
return static_cast<unsigned char>(*gptr());
}
//xerr("CALLED from offset " << d_bridge.offset());
//xerr(" data: " << (void *)d_bridge.data());
//xerr(" begin: " << d_bridge.begin());
//xerr(" end: " << d_bridge.end());
//xerr(" size: " << d_bridge.size());
//xerr(" ptr: " << (void *)d_bridge.ptr());
//xerr(" beyond: " << (void *)d_bridge.beyond());
//xerr(" writing " << (d_bridge.beyond() - d_bridge.ptr()) <<
// " bytes from " << d_bridge.offset());
//xerr("Next offset: " << d_bridge.offset());
//
////xerr("available: " << (d_bridge.beyond() - d_bridge.next()) << " chars");
//
// return static_cast<unsigned char>(*d_bridge.next());
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