CMakeLua/Source/cmWhileCommand.cxx

   1 /*=========================================================================
   2
   3   Program:   CMake - Cross-Platform Makefile Generator
   4   Module:    $RCSfile: cmWhileCommand.cxx,v $
   5   Language:  C++
   6   Date:      $Date: 2009-01-21 14:49:00 $
   7   Version:   $Revision: 1.16 $
   8
   9   Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
  10   See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
  11
  12      This software is distributed WITHOUT ANY WARRANTY; without even
  13      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  14      PURPOSE.  See the above copyright notices for more information.
  15
  16 =========================================================================*/
  17 #include "cmWhileCommand.h"
  18 #include "cmIfCommand.h"
  19
  20 bool cmWhileFunctionBlocker::
  21 IsFunctionBlocked(const cmListFileFunction& lff, cmMakefile &mf,
  22                   cmExecutionStatus &inStatus)
  23 {
  24   // at end of for each execute recorded commands
  25   if (!cmSystemTools::Strucmp(lff.Name.c_str(),"while"))
  26     {
  27     // record the number of while commands past this one
  28     this->Depth++;
  29     }
  30   else if (!cmSystemTools::Strucmp(lff.Name.c_str(),"endwhile"))
  31     {
  32     // if this is the endwhile for this while loop then execute
  33     if (!this->Depth)
  34       {
  35       // Remove the function blocker for this scope or bail.
  36       cmsys::auto_ptr<cmFunctionBlocker>
  37         fb(mf.RemoveFunctionBlocker(this, lff));
  38       if(!fb.get()) { return false; }
  39
  40       std::string errorString;
  41
  42       std::vector<std::string> expandedArguments;
  43       mf.ExpandArguments(this->Args, expandedArguments);
  44       bool isTrue =
  45         cmIfCommand::IsTrue(expandedArguments,errorString,&mf);
  46
  47       while (isTrue)
  48         {
  49         // Invoke all the functions that were collected in the block.
  50         for(unsigned int c = 0; c < this->Functions.size(); ++c)
  51           {
  52           cmExecutionStatus status;
  53           mf.ExecuteCommand(this->Functions[c],status);
  54           if (status.GetReturnInvoked())
  55             {
  56             inStatus.SetReturnInvoked(true);
  57             return true;
  58             }
  59           if (status.GetBreakInvoked())
  60             {
  61             return true;
  62             }
  63           }
  64         expandedArguments.clear();
  65         mf.ExpandArguments(this->Args, expandedArguments);
  66         isTrue =
  67           cmIfCommand::IsTrue(expandedArguments,errorString,&mf);
  68         }
  69       return true;
  70       }
  71     else
  72       {
  73       // decrement for each nested while that ends
  74       this->Depth--;
  75       }
  76     }
  77
  78   // record the command
  79   this->Functions.push_back(lff);
  80
  81   // always return true
  82   return true;
  83 }
  84
  85 bool cmWhileFunctionBlocker::
  86 ShouldRemove(const cmListFileFunction& lff, cmMakefile& )
  87 {
  88   if(!cmSystemTools::Strucmp(lff.Name.c_str(),"endwhile"))
  89     {
  90     // if the endwhile has arguments, then make sure
  91     // they match the arguments of the matching while
  92     if (lff.Arguments.size() == 0 ||
  93         lff.Arguments == this->Args)
  94       {
  95       return true;
  96       }
  97     }
  98   return false;
  99 }
 100
 101 bool cmWhileCommand
 102 ::InvokeInitialPass(const std::vector<cmListFileArgument>& args,
 103                     cmExecutionStatus &)
 104 {
 105   if(args.size() < 1)
 106     {
 107     this->SetError("called with incorrect number of arguments");
 108     return false;
 109     }
 110
 111   // create a function blocker
 112   cmWhileFunctionBlocker *f = new cmWhileFunctionBlocker();
 113   f->Args = args;
 114   this->Makefile->AddFunctionBlocker(f);
 115
 116   return true;
 117 }
 118