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714 lines
19 KiB
714 lines
19 KiB
/*=========================================================================
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Program: CMake - Cross-Platform Makefile Generator
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Module: $RCSfile: cmIfCommand.cxx,v $
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Language: C++
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Date: $Date: 2008-03-24 22:23:26 $
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Version: $Revision: 1.84.2.1 $
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Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
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See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notices for more information.
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=========================================================================*/
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#include "cmIfCommand.h"
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#include "cmStringCommand.h"
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#include <stdlib.h> // required for atof
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#include <list>
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#include <cmsys/RegularExpression.hxx>
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bool cmIfFunctionBlocker::
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IsFunctionBlocked(const cmListFileFunction& lff, cmMakefile &mf,
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cmExecutionStatus &inStatus)
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{
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// Prevent recusion and don't let this blocker block its own
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// commands.
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if (this->Executing)
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{
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return false;
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}
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// we start by recording all the functions
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if (!cmSystemTools::Strucmp(lff.Name.c_str(),"if"))
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{
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this->ScopeDepth++;
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}
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if (!cmSystemTools::Strucmp(lff.Name.c_str(),"endif"))
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{
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this->ScopeDepth--;
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// if this is the endif for this if statement, then start executing
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if (!this->ScopeDepth)
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{
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// execute the functions for the true parts of the if statement
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this->Executing = true;
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cmExecutionStatus status;
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int scopeDepth = 0;
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for(unsigned int c = 0; c < this->Functions.size(); ++c)
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{
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// keep track of scope depth
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if (!cmSystemTools::Strucmp(this->Functions[c].Name.c_str(),"if"))
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{
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scopeDepth++;
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}
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if (!cmSystemTools::Strucmp(this->Functions[c].Name.c_str(),"endif"))
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{
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scopeDepth--;
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}
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// watch for our state change
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if (scopeDepth == 0 &&
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!cmSystemTools::Strucmp(this->Functions[c].Name.c_str(),"else"))
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{
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this->IsBlocking = this->HasRun;
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this->HasRun = true;
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}
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else if (scopeDepth == 0 && !cmSystemTools::Strucmp
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(this->Functions[c].Name.c_str(),"elseif"))
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{
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if (this->HasRun)
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{
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this->IsBlocking = true;
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}
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else
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{
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char* errorString = 0;
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std::vector<std::string> expandedArguments;
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mf.ExpandArguments(this->Functions[c].Arguments,
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expandedArguments);
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bool isTrue =
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cmIfCommand::IsTrue(expandedArguments,&errorString,&mf);
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if (errorString)
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{
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std::string err = "had incorrect arguments: ";
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unsigned int i;
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for(i =0; i < this->Functions[c].Arguments.size(); ++i)
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{
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err += (this->Functions[c].Arguments[i].Quoted?"\"":"");
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err += this->Functions[c].Arguments[i].Value;
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err += (this->Functions[c].Arguments[i].Quoted?"\"":"");
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err += " ";
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}
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err += "(";
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err += errorString;
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err += ").";
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cmSystemTools::Error(err.c_str());
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delete [] errorString;
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return false;
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}
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if (isTrue)
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{
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this->IsBlocking = false;
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this->HasRun = true;
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}
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}
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}
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// should we execute?
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else if (!this->IsBlocking)
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{
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status.Clear();
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mf.ExecuteCommand(this->Functions[c],status);
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if (status.GetReturnInvoked())
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{
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inStatus.SetReturnInvoked(true);
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mf.RemoveFunctionBlocker(lff);
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return true;
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}
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if (status.GetBreakInvoked())
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{
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inStatus.SetBreakInvoked(true);
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mf.RemoveFunctionBlocker(lff);
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return true;
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}
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}
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}
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mf.RemoveFunctionBlocker(lff);
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return true;
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}
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}
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// record the command
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this->Functions.push_back(lff);
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// always return true
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return true;
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}
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bool cmIfFunctionBlocker::ShouldRemove(const cmListFileFunction& lff,
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cmMakefile&)
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{
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if (!cmSystemTools::Strucmp(lff.Name.c_str(),"endif"))
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{
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// if the endif has arguments, then make sure
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// they match the arguments of the matching if
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if (lff.Arguments.size() == 0 ||
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lff.Arguments == this->Args)
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{
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return true;
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}
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}
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return false;
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}
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void cmIfFunctionBlocker::
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ScopeEnded(cmMakefile &mf)
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{
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std::string errmsg = "The end of a CMakeLists file was reached with an "
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"IF statement that was not closed properly.\nWithin the directory: ";
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errmsg += mf.GetCurrentDirectory();
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errmsg += "\nThe arguments are: ";
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for(std::vector<cmListFileArgument>::const_iterator j = this->Args.begin();
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j != this->Args.end(); ++j)
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{
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errmsg += (j->Quoted?"\"":"");
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errmsg += j->Value;
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errmsg += (j->Quoted?"\"":"");
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errmsg += " ";
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}
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cmSystemTools::Message(errmsg.c_str(), "Warning");
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}
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bool cmIfCommand
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::InvokeInitialPass(const std::vector<cmListFileArgument>& args,
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cmExecutionStatus &)
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{
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char* errorString = 0;
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std::vector<std::string> expandedArguments;
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this->Makefile->ExpandArguments(args, expandedArguments);
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bool isTrue =
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cmIfCommand::IsTrue(expandedArguments,&errorString,this->Makefile);
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if (errorString)
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{
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std::string err = "had incorrect arguments: ";
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unsigned int i;
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for(i =0; i < args.size(); ++i)
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{
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err += (args[i].Quoted?"\"":"");
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err += args[i].Value;
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err += (args[i].Quoted?"\"":"");
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err += " ";
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}
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err += "(";
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err += errorString;
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err += ").";
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this->SetError(err.c_str());
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delete [] errorString;
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return false;
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}
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cmIfFunctionBlocker *f = new cmIfFunctionBlocker();
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// if is isn't true block the commands
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f->ScopeDepth = 1;
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f->IsBlocking = !isTrue;
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if (isTrue)
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{
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f->HasRun = true;
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}
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f->Args = args;
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this->Makefile->AddFunctionBlocker(f);
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return true;
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}
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namespace
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{
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void IncrementArguments(std::list<std::string> &newArgs,
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std::list<std::string>::iterator &argP1,
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std::list<std::string>::iterator &argP2)
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{
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if (argP1 != newArgs.end())
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{
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argP1++;
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argP2 = argP1;
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if (argP1 != newArgs.end())
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{
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argP2++;
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}
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}
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}
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}
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// order of operations,
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// IS_DIRECTORY EXISTS COMMAND DEFINED
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// MATCHES LESS GREATER EQUAL STRLESS STRGREATER STREQUAL
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// AND OR
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//
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// There is an issue on whether the arguments should be values of references,
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// for example IF (FOO AND BAR) should that compare the strings FOO and BAR
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// or should it really do IF (${FOO} AND ${BAR}) Currently IS_DIRECTORY
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// EXISTS COMMAND and DEFINED all take values. EQUAL, LESS and GREATER can
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// take numeric values or variable names. STRLESS and STRGREATER take
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// variable names but if the variable name is not found it will use the name
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// directly. AND OR take variables or the values 0 or 1.
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bool cmIfCommand::IsTrue(const std::vector<std::string> &args,
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char **errorString, cmMakefile *makefile)
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{
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// check for the different signatures
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const char *def;
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const char *def2;
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const char* msg = "Unknown arguments specified";
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*errorString = new char[strlen(msg) + 1];
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strcpy(*errorString, msg);
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// handle empty invocation
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if (args.size() < 1)
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{
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delete [] *errorString;
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*errorString = 0;
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return false;
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}
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// store the reduced args in this vector
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std::list<std::string> newArgs;
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int reducible;
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unsigned int i;
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// copy to the list structure
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for(i = 0; i < args.size(); ++i)
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{
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newArgs.push_back(args[i]);
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}
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std::list<std::string>::iterator argP1;
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std::list<std::string>::iterator argP2;
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// now loop through the arguments and see if we can reduce any of them
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// we do this multiple times. Once for each level of precedence
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do
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{
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reducible = 0;
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std::list<std::string>::iterator arg = newArgs.begin();
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while (arg != newArgs.end())
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{
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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// does a file exist
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if (*arg == "EXISTS" && argP1 != newArgs.end())
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{
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if(cmSystemTools::FileExists((argP1)->c_str()))
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{
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*arg = "1";
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}
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else
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{
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*arg = "0";
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}
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newArgs.erase(argP1);
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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// does a directory with this name exist
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if (*arg == "IS_DIRECTORY" && argP1 != newArgs.end())
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{
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if(cmSystemTools::FileIsDirectory((argP1)->c_str()))
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{
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*arg = "1";
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}
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else
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{
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*arg = "0";
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}
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newArgs.erase(argP1);
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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// is the given path an absolute path ?
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if (*arg == "IS_ABSOLUTE" && argP1 != newArgs.end())
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{
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if(cmSystemTools::FileIsFullPath((argP1)->c_str()))
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{
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*arg = "1";
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}
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else
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{
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*arg = "0";
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}
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newArgs.erase(argP1);
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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// does a command exist
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if (*arg == "COMMAND" && argP1 != newArgs.end())
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{
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if(makefile->CommandExists((argP1)->c_str()))
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{
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*arg = "1";
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}
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else
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{
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*arg = "0";
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}
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newArgs.erase(argP1);
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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// does a policy exist
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if (*arg == "POLICY" && argP1 != newArgs.end())
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{
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cmPolicies::PolicyID pid;
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if(makefile->GetPolicies()->GetPolicyID((argP1)->c_str(), pid))
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{
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*arg = "1";
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}
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else
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{
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*arg = "0";
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}
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newArgs.erase(argP1);
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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// is a variable defined
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if (*arg == "DEFINED" && argP1 != newArgs.end())
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{
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size_t argP1len = argP1->size();
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bool bdef = false;
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if(argP1len > 4 && argP1->substr(0, 4) == "ENV{" &&
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argP1->operator[](argP1len-1) == '}')
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{
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std::string env = argP1->substr(4, argP1len-5);
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bdef = cmSystemTools::GetEnv(env.c_str())?true:false;
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}
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else
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{
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bdef = makefile->IsDefinitionSet((argP1)->c_str());
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}
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if(bdef)
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{
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*arg = "1";
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}
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else
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{
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*arg = "0";
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}
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newArgs.erase(argP1);
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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++arg;
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}
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}
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while (reducible);
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// now loop through the arguments and see if we can reduce any of them
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// we do this multiple times. Once for each level of precedence
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do
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{
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reducible = 0;
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std::list<std::string>::iterator arg = newArgs.begin();
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while (arg != newArgs.end())
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{
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
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*(argP1) == "MATCHES")
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{
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def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
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const char* rex = (argP2)->c_str();
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cmStringCommand::ClearMatches(makefile);
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cmsys::RegularExpression regEntry;
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if ( !regEntry.compile(rex) )
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{
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cmOStringStream error;
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error << "Regular expression \"" << rex << "\" cannot compile";
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delete [] *errorString;
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*errorString = new char[error.str().size() + 1];
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strcpy(*errorString, error.str().c_str());
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return false;
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}
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if (regEntry.find(def))
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{
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cmStringCommand::StoreMatches(makefile, regEntry);
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*arg = "1";
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}
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else
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{
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*arg = "0";
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}
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newArgs.erase(argP2);
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newArgs.erase(argP1);
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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if (argP1 != newArgs.end() && *arg == "MATCHES")
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{
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*arg = "0";
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newArgs.erase(argP1);
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
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(*(argP1) == "LESS" || *(argP1) == "GREATER" ||
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*(argP1) == "EQUAL"))
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{
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def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
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def2 = cmIfCommand::GetVariableOrString((argP2)->c_str(), makefile);
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double lhs;
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double rhs;
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if(sscanf(def, "%lg", &lhs) != 1 ||
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sscanf(def2, "%lg", &rhs) != 1)
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{
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*arg = "0";
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}
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else if (*(argP1) == "LESS")
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{
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if(lhs < rhs)
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{
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*arg = "1";
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}
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else
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{
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*arg = "0";
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}
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}
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else if (*(argP1) == "GREATER")
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{
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if(lhs > rhs)
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{
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*arg = "1";
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}
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else
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{
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*arg = "0";
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}
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}
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else
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{
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if(lhs == rhs)
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{
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*arg = "1";
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}
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else
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{
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*arg = "0";
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}
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}
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newArgs.erase(argP2);
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newArgs.erase(argP1);
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
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(*(argP1) == "STRLESS" ||
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*(argP1) == "STREQUAL" ||
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*(argP1) == "STRGREATER"))
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{
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def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
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def2 = cmIfCommand::GetVariableOrString((argP2)->c_str(), makefile);
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int val = strcmp(def,def2);
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int result;
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if (*(argP1) == "STRLESS")
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{
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result = (val < 0);
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}
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else if (*(argP1) == "STRGREATER")
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{
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result = (val > 0);
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}
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else // strequal
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{
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result = (val == 0);
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}
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if(result)
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{
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*arg = "1";
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}
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else
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{
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*arg = "0";
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}
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newArgs.erase(argP2);
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newArgs.erase(argP1);
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argP1 = arg;
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IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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// is file A newer than file B
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if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
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*(argP1) == "IS_NEWER_THAN")
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{
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int fileIsNewer=0;
|
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bool success=cmSystemTools::FileTimeCompare(arg->c_str(),
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(argP2)->c_str(),
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&fileIsNewer);
|
|
if(success==false || fileIsNewer==1 || fileIsNewer==0)
|
|
{
|
|
*arg = "1";
|
|
}
|
|
else
|
|
{
|
|
*arg = "0";
|
|
}
|
|
newArgs.erase(argP2);
|
|
newArgs.erase(argP1);
|
|
argP1 = arg;
|
|
IncrementArguments(newArgs,argP1,argP2);
|
|
reducible = 1;
|
|
}
|
|
|
|
++arg;
|
|
}
|
|
}
|
|
while (reducible);
|
|
|
|
|
|
// now loop through the arguments and see if we can reduce any of them
|
|
// we do this multiple times. Once for each level of precedence
|
|
do
|
|
{
|
|
reducible = 0;
|
|
std::list<std::string>::iterator arg = newArgs.begin();
|
|
while (arg != newArgs.end())
|
|
{
|
|
argP1 = arg;
|
|
IncrementArguments(newArgs,argP1,argP2);
|
|
if (argP1 != newArgs.end() && *arg == "NOT")
|
|
{
|
|
def = cmIfCommand::GetVariableOrNumber((argP1)->c_str(), makefile);
|
|
if(!cmSystemTools::IsOff(def))
|
|
{
|
|
*arg = "0";
|
|
}
|
|
else
|
|
{
|
|
*arg = "1";
|
|
}
|
|
newArgs.erase(argP1);
|
|
argP1 = arg;
|
|
IncrementArguments(newArgs,argP1,argP2);
|
|
reducible = 1;
|
|
}
|
|
++arg;
|
|
}
|
|
}
|
|
while (reducible);
|
|
|
|
// now loop through the arguments and see if we can reduce any of them
|
|
// we do this multiple times. Once for each level of precedence
|
|
do
|
|
{
|
|
reducible = 0;
|
|
std::list<std::string>::iterator arg = newArgs.begin();
|
|
while (arg != newArgs.end())
|
|
{
|
|
argP1 = arg;
|
|
IncrementArguments(newArgs,argP1,argP2);
|
|
if (argP1 != newArgs.end() && *(argP1) == "AND" &&
|
|
argP2 != newArgs.end())
|
|
{
|
|
def = cmIfCommand::GetVariableOrNumber(arg->c_str(), makefile);
|
|
def2 = cmIfCommand::GetVariableOrNumber((argP2)->c_str(), makefile);
|
|
if(cmSystemTools::IsOff(def) || cmSystemTools::IsOff(def2))
|
|
{
|
|
*arg = "0";
|
|
}
|
|
else
|
|
{
|
|
*arg = "1";
|
|
}
|
|
newArgs.erase(argP2);
|
|
newArgs.erase(argP1);
|
|
argP1 = arg;
|
|
IncrementArguments(newArgs,argP1,argP2);
|
|
reducible = 1;
|
|
}
|
|
|
|
if (argP1 != newArgs.end() && *(argP1) == "OR" &&
|
|
argP2 != newArgs.end())
|
|
{
|
|
def = cmIfCommand::GetVariableOrNumber(arg->c_str(), makefile);
|
|
def2 = cmIfCommand::GetVariableOrNumber((argP2)->c_str(), makefile);
|
|
if(cmSystemTools::IsOff(def) && cmSystemTools::IsOff(def2))
|
|
{
|
|
*arg = "0";
|
|
}
|
|
else
|
|
{
|
|
*arg = "1";
|
|
}
|
|
newArgs.erase(argP2);
|
|
newArgs.erase(argP1);
|
|
argP1 = arg;
|
|
IncrementArguments(newArgs,argP1,argP2);
|
|
reducible = 1;
|
|
}
|
|
|
|
++arg;
|
|
}
|
|
}
|
|
while (reducible);
|
|
|
|
// now at the end there should only be one argument left
|
|
if (newArgs.size() == 1)
|
|
{
|
|
delete [] *errorString;
|
|
*errorString = 0;
|
|
if (*newArgs.begin() == "0")
|
|
{
|
|
return false;
|
|
}
|
|
if (*newArgs.begin() == "1")
|
|
{
|
|
return true;
|
|
}
|
|
def = makefile->GetDefinition(args[0].c_str());
|
|
if(cmSystemTools::IsOff(def))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
const char* cmIfCommand::GetVariableOrString(const char* str,
|
|
const cmMakefile* mf)
|
|
{
|
|
const char* def = mf->GetDefinition(str);
|
|
if(!def)
|
|
{
|
|
def = str;
|
|
}
|
|
return def;
|
|
}
|
|
|
|
const char* cmIfCommand::GetVariableOrNumber(const char* str,
|
|
const cmMakefile* mf)
|
|
{
|
|
const char* def = mf->GetDefinition(str);
|
|
if(!def)
|
|
{
|
|
if (atoi(str))
|
|
{
|
|
def = str;
|
|
}
|
|
}
|
|
return def;
|
|
}
|