CMakeLua/Source/cmRemoveCommand.cxx

   1 /*=========================================================================
   2
   3   Program:   CMake - Cross-Platform Makefile Generator
   4   Module:    $RCSfile: cmRemoveCommand.cxx,v $
   5   Language:  C++
   6   Date:      $Date: 2008/01/23 15:27:59 $
   7   Version:   $Revision: 1.7 $
   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 "cmRemoveCommand.h"
  18
  19 // cmRemoveCommand
  20 bool cmRemoveCommand
  21 ::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &)
  22 {
  23   if(args.size() < 1)
  24     {
  25     return true;
  26     }
  27
  28   const char* variable = args[0].c_str(); // VAR is always first
  29   // get the old value
  30   const char* cacheValue
  31     = this->Makefile->GetDefinition(variable);
  32
  33   // if there is no old value then return
  34   if (!cacheValue)
  35     {
  36     return true;
  37     }
  38
  39   // expand the variable
  40   std::vector<std::string> varArgsExpanded;
  41   cmSystemTools::ExpandListArgument(cacheValue, varArgsExpanded);
  42
  43   // expand the args
  44   // check for REMOVE(VAR v1 v2 ... vn)
  45   std::vector<std::string> argsExpanded;
  46   std::vector<std::string> temp;
  47   for(unsigned int j = 1; j < args.size(); ++j)
  48     {
  49     temp.push_back(args[j]);
  50     }
  51   cmSystemTools::ExpandList(temp, argsExpanded);
  52
  53   // now create the new value
  54   std::string value;
  55   for(unsigned int j = 0; j < varArgsExpanded.size(); ++j)
  56     {
  57     int found = 0;
  58     for(unsigned int k = 0; k < argsExpanded.size(); ++k)
  59       {
  60       if (varArgsExpanded[j] == argsExpanded[k])
  61         {
  62         found = 1;
  63         break;
  64         }
  65       }
  66     if (!found)
  67       {
  68       if (value.size())
  69         {
  70         value += ";";
  71         }
  72       value += varArgsExpanded[j];
  73       }
  74     }
  75
  76   // add the definition
  77   this->Makefile->AddDefinition(variable, value.c_str());
  78
  79   return true;
  80 }
  81