Generic progress meter

Author: jgg
Date: 1998-07-21 05:33:18 GMT
Generic progress meter

1 files changed, 151 insertions, 0 deletions

diff --git a/apt-pkg/contrib/progress.cc b/apt-pkg/contrib/progress.cc
new file mode 100644
index 000000000..18dffc83e
--- /dev/null
+++ b/apt-pkg/contrib/progress.cc
@@ -0,0 +1,151 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: progress.cc,v 1.1 1998/07/21 05:33:21 jgg Exp $
+/* ######################################################################
+   
+   OpProgress - Operation Progress
+   
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#ifdef __GNUG__
+#pragma implementation "apt-pkg/progress.h"
+#endif 
+#include <apt-pkg/progress.h>
+#include <stdio.h>
+									/*}}}*/
+
+// OpProgress::OpProgress - Constructor					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+OpProgress::OpProgress() : Current(0), Total(0), Size(0), SubTotal(1), 
+                           LastPercent(0), Percent(0)
+{
+   memset(&LastTime,0,sizeof(LastTime));
+}
+									/*}}}*/
+// OpProgress::Progress - Sub progress with no state change		/*{{{*/
+// ---------------------------------------------------------------------
+/* This assumes that Size is the same as the current sub size */
+void OpProgress::Progress(unsigned long Cur)
+{
+   Percent = (Current + Cur/((float)SubTotal)*Size)*100.0/Total;
+   Update();
+}
+									/*}}}*/
+// OpProgress::OverallProgress - Set the overall progress		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void OpProgress::OverallProgress(unsigned long Current, unsigned long Total,
+	  			 unsigned long Size,string Op)
+{
+   this->Current = Current;
+   this->Total = Total;
+   this->Size = Size;
+   this->Op = Op;
+   SubOp = string();
+   Percent = Current*100.0/Total;
+   Update();
+}
+									/*}}}*/
+// OpProgress::SubProgress - Set the sub progress state			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void OpProgress::SubProgress(unsigned long SubTotal,string Op)
+{
+   this->SubTotal = SubTotal;
+   SubOp = Op;
+   Percent = Current*100.0/Total;
+   Update();
+}
+									/*}}}*/
+// OpProgress::CheckChange - See if the display should be updated	/*{{{*/
+// ---------------------------------------------------------------------
+/* Progress calls are made so frequently that if every one resulted in 
+   an update the display would be swamped and the system much slower.
+   This provides an upper bound on the update rate. */
+bool OpProgress::CheckChange(float Interval)
+{  
+   // New major progress indication
+   if (Op != LastOp)
+   {
+      MajorChange = true;
+      LastOp = Op;
+      return true;
+   }
+   MajorChange = false;
+
+   if ((int)LastPercent == (int)Percent)
+      return false;
+   LastPercent = Percent;
+   
+   // Check time delta
+   struct timeval Now;
+   gettimeofday(&Now,0);
+   double Diff = Now.tv_sec - LastTime.tv_sec + (Now.tv_usec - LastTime.tv_usec)/1000000.0;
+   if (Diff < Interval)
+      return false;
+   LastTime = Now;   
+   return true;
+}
+									/*}}}*/
+// OpTextProgress::Done - Clean up the display				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void OpTextProgress::Done()
+{
+   if (NoUpdate == false && OldOp.empty() == false)
+   {
+      char S[300];
+      snprintf(S,sizeof(S),"\r%s",OldOp.c_str());
+      Write(S);
+      cout << endl;
+      OldOp = string();
+   }      
+}
+									/*}}}*/
+// OpTextProgress::Update - Simple text spinner				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void OpTextProgress::Update()
+{
+   if (CheckChange(0) == false)
+      return;
+   
+   // No percent spinner
+   if (NoUpdate == true)
+   {
+      if (MajorChange == false)
+	 return;
+      cout << Op << endl;
+      return;
+   }
+
+   // Erase the old text and 'log' the event
+   char S[300];
+   if (MajorChange == true && OldOp.empty() == false)
+   {
+      snprintf(S,sizeof(S),"\r%s",OldOp.c_str());
+      Write(S);
+      cout << endl;
+   }
+   
+   // Print the spinner
+   snprintf(S,sizeof(S),"\r%s... %u%%",Op.c_str(),(unsigned int)Percent);
+   Write(S);
+
+   OldOp = Op;
+}
+									/*}}}*/
+// OpTextProgress::Write - Write the progress string			/*{{{*/
+// ---------------------------------------------------------------------
+/* This space fills the end to overwrite the previous text */
+void OpTextProgress::Write(const char *S)
+{
+   cout << S;
+   for (unsigned int I = strlen(S); I < LastLen; I++)
+      cout << ' ';
+   cout << '\r' << flush;
+   LastLen = strlen(S);
+}
+									/*}}}*/