iokit/Kernel/IOHibernateIO.cpp

871     vars->extentRemaining = extentMap->length - position;
874     if (vars->bufferSize <= vars->extentRemaining)
877 	vars->bufferLimit = vars->extentRemaining;
979 	    vars->extentRemaining -= vars->bufferOffset;
980 	    if (!vars->extentRemaining)
983 		vars->extentRemaining = vars->currentExtent->length;
985                 if (!vars->extentRemaining)
994 	    if (vars->bufferSize <= vars->extentRemaining)
997 		vars->bufferLimit = vars->extentRemaining;
1046 	    vars->extentRemaining -= vars->lastRead;
1049 	    if (!vars->extentRemaining)
1052 		vars->extentRemaining = vars->currentExtent->length;
1054                 if (!vars->extentRemaining)
1065 	    if (vars->extentRemaining <= vars->bufferSize)
1066 		length = vars->extentRemaining;