815 lines
23 KiB
C++
815 lines
23 KiB
C++
/*=========================================================================
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Program: CMake - Cross-Platform Makefile Generator
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Module: $RCSfile$
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Language: C++
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Date: $Date$
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Version: $Revision$
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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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//=========================================================================
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bool cmIfFunctionBlocker::
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IsFunctionBlocked(const cmListFileFunction& lff,
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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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std::string errorString;
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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.size())
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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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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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//=========================================================================
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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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//=========================================================================
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void cmIfFunctionBlocker::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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//=========================================================================
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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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std::string errorString;
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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.size())
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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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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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//=========================================================================
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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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// helper function to reduce code duplication
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void HandlePredicate(bool value, int &reducible,
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std::list<std::string>::iterator &arg,
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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(value)
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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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//=========================================================================
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// helper function to reduce code duplication
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void HandleBinaryOp(bool value, int &reducible,
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std::list<std::string>::iterator &arg,
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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(value)
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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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//=========================================================================
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enum Op { OpLess, OpEqual, OpGreater };
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bool HandleVersionCompare(Op op, const char* lhs_str, const char* rhs_str)
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{
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// Parse out up to 4 components.
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unsigned int lhs[4] = {0,0,0,0};
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unsigned int rhs[4] = {0,0,0,0};
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sscanf(lhs_str, "%u.%u.%u.%u", &lhs[0], &lhs[1], &lhs[2], &lhs[3]);
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sscanf(rhs_str, "%u.%u.%u.%u", &rhs[0], &rhs[1], &rhs[2], &rhs[3]);
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// Do component-wise comparison.
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for(unsigned int i=0; i < 4; ++i)
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{
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if(lhs[i] < rhs[i])
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{
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// lhs < rhs, so true if operation is LESS
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return op == OpLess;
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}
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else if(lhs[i] > rhs[i])
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{
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// lhs > rhs, so true if operation is GREATER
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return op == OpGreater;
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}
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}
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// lhs == rhs, so true if operation is EQUAL
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return op == OpEqual;
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}
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//=========================================================================
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// level 0 processes parenthetical expressions
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bool HandleLevel0(std::list<std::string> &newArgs,
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cmMakefile *makefile,
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std::string &errorString)
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{
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int reducible;
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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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if (*arg == "(")
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{
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// search for the closing paren for this opening one
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std::list<std::string>::iterator argClose;
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argClose = arg;
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argClose++;
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unsigned int depth = 1;
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while (argClose != newArgs.end() && depth)
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{
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if (*argClose == "(")
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{
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depth++;
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}
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if (*argClose == ")")
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{
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depth--;
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}
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argClose++;
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}
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if (depth)
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{
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errorString = "mismatched parenthesis in condition";
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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::vector<std::string> newArgs2;
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// copy to the list structure
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std::list<std::string>::iterator argP1 = arg;
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argP1++;
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for(; argP1 != argClose; argP1++)
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{
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newArgs2.push_back(*argP1);
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}
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newArgs2.pop_back();
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// now recursively invoke IsTrue to handle the values inside the
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// parenthetical expression
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bool value =
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cmIfCommand::IsTrue(newArgs2, errorString, makefile);
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if(value)
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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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argP1 = arg;
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argP1++;
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// remove the now evaluated parenthetical expression
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newArgs.erase(argP1,argClose);
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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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return true;
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}
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//=========================================================================
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// level one handles most predicates except for NOT
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bool HandleLevel1(std::list<std::string> &newArgs,
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cmMakefile *makefile,
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std::string &)
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{
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int reducible;
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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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std::list<std::string>::iterator argP1;
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std::list<std::string>::iterator argP2;
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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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HandlePredicate(
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cmSystemTools::FileExists((argP1)->c_str()),
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reducible, arg, newArgs, argP1, argP2);
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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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HandlePredicate(
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cmSystemTools::FileIsDirectory((argP1)->c_str()),
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reducible, arg, newArgs, argP1, argP2);
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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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HandlePredicate(
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cmSystemTools::FileIsFullPath((argP1)->c_str()),
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reducible, arg, newArgs, argP1, argP2);
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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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HandlePredicate(
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makefile->CommandExists((argP1)->c_str()),
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reducible, arg, newArgs, argP1, argP2);
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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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HandlePredicate(
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makefile->GetPolicies()->GetPolicyID((argP1)->c_str(), pid),
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reducible, arg, newArgs, argP1, argP2);
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}
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// does a target exist
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if (*arg == "TARGET" && argP1 != newArgs.end())
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{
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HandlePredicate(
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makefile->FindTargetToUse((argP1)->c_str())? true:false,
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reducible, arg, newArgs, argP1, argP2);
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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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HandlePredicate(bdef, reducible, arg, newArgs, argP1, argP2);
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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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return true;
|
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}
|
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|
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//=========================================================================
|
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// level two handles most binary operations except for AND OR
|
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bool HandleLevel2(std::list<std::string> &newArgs,
|
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cmMakefile *makefile,
|
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std::string &errorString)
|
|
{
|
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int reducible;
|
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const char *def;
|
|
const char *def2;
|
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do
|
|
{
|
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reducible = 0;
|
|
std::list<std::string>::iterator arg = newArgs.begin();
|
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std::list<std::string>::iterator argP1;
|
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std::list<std::string>::iterator argP2;
|
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while (arg != newArgs.end())
|
|
{
|
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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);
|
|
cmsys::RegularExpression regEntry;
|
|
if ( !regEntry.compile(rex) )
|
|
{
|
|
cmOStringStream error;
|
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error << "Regular expression \"" << rex << "\" cannot compile";
|
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errorString = error.str();
|
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return false;
|
|
}
|
|
if (regEntry.find(def))
|
|
{
|
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cmStringCommand::StoreMatches(makefile, regEntry);
|
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*arg = "1";
|
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}
|
|
else
|
|
{
|
|
*arg = "0";
|
|
}
|
|
newArgs.erase(argP2);
|
|
newArgs.erase(argP1);
|
|
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")
|
|
{
|
|
*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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|
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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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def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
|
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def2 = cmIfCommand::GetVariableOrString((argP2)->c_str(), makefile);
|
|
double lhs;
|
|
double rhs;
|
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bool result;
|
|
if(sscanf(def, "%lg", &lhs) != 1 ||
|
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sscanf(def2, "%lg", &rhs) != 1)
|
|
{
|
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result = false;
|
|
}
|
|
else if (*(argP1) == "LESS")
|
|
{
|
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result = (lhs < rhs);
|
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}
|
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else if (*(argP1) == "GREATER")
|
|
{
|
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result = (lhs > rhs);
|
|
}
|
|
else
|
|
{
|
|
result = (lhs == rhs);
|
|
}
|
|
HandleBinaryOp(result,
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
|
|
if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
|
|
(*(argP1) == "STRLESS" ||
|
|
*(argP1) == "STREQUAL" ||
|
|
*(argP1) == "STRGREATER"))
|
|
{
|
|
def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
|
|
def2 = cmIfCommand::GetVariableOrString((argP2)->c_str(), makefile);
|
|
int val = strcmp(def,def2);
|
|
bool result;
|
|
if (*(argP1) == "STRLESS")
|
|
{
|
|
result = (val < 0);
|
|
}
|
|
else if (*(argP1) == "STRGREATER")
|
|
{
|
|
result = (val > 0);
|
|
}
|
|
else // strequal
|
|
{
|
|
result = (val == 0);
|
|
}
|
|
HandleBinaryOp(result,
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
|
|
if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
|
|
(*(argP1) == "VERSION_LESS" || *(argP1) == "VERSION_GREATER" ||
|
|
*(argP1) == "VERSION_EQUAL"))
|
|
{
|
|
def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
|
|
def2 = cmIfCommand::GetVariableOrString((argP2)->c_str(), makefile);
|
|
Op op = OpEqual;
|
|
if(*argP1 == "VERSION_LESS")
|
|
{
|
|
op = OpLess;
|
|
}
|
|
else if(*argP1 == "VERSION_GREATER")
|
|
{
|
|
op = OpGreater;
|
|
}
|
|
bool result = HandleVersionCompare(op, def, def2);
|
|
HandleBinaryOp(result,
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
|
|
// is file A newer than file B
|
|
if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
|
|
*(argP1) == "IS_NEWER_THAN")
|
|
{
|
|
int fileIsNewer=0;
|
|
bool success=cmSystemTools::FileTimeCompare(arg->c_str(),
|
|
(argP2)->c_str(),
|
|
&fileIsNewer);
|
|
HandleBinaryOp(
|
|
(success==false || fileIsNewer==1 || fileIsNewer==0),
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
|
|
++arg;
|
|
}
|
|
}
|
|
while (reducible);
|
|
return true;
|
|
}
|
|
|
|
//=========================================================================
|
|
// level 3 handles NOT
|
|
bool HandleLevel3(std::list<std::string> &newArgs,
|
|
cmMakefile *makefile,
|
|
std::string &)
|
|
{
|
|
int reducible;
|
|
const char *def;
|
|
do
|
|
{
|
|
reducible = 0;
|
|
std::list<std::string>::iterator arg = newArgs.begin();
|
|
std::list<std::string>::iterator argP1;
|
|
std::list<std::string>::iterator argP2;
|
|
while (arg != newArgs.end())
|
|
{
|
|
argP1 = arg;
|
|
IncrementArguments(newArgs,argP1,argP2);
|
|
if (argP1 != newArgs.end() && *arg == "NOT")
|
|
{
|
|
def = cmIfCommand::GetVariableOrNumber((argP1)->c_str(), makefile);
|
|
HandlePredicate(cmSystemTools::IsOff(def),
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
++arg;
|
|
}
|
|
}
|
|
while (reducible);
|
|
return true;
|
|
}
|
|
|
|
//=========================================================================
|
|
// level 4 handles AND OR
|
|
bool HandleLevel4(std::list<std::string> &newArgs,
|
|
cmMakefile *makefile,
|
|
std::string &)
|
|
{
|
|
int reducible;
|
|
const char *def;
|
|
const char *def2;
|
|
do
|
|
{
|
|
reducible = 0;
|
|
std::list<std::string>::iterator arg = newArgs.begin();
|
|
std::list<std::string>::iterator argP1;
|
|
std::list<std::string>::iterator argP2;
|
|
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);
|
|
HandleBinaryOp(
|
|
!(cmSystemTools::IsOff(def) || cmSystemTools::IsOff(def2)),
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
|
|
if (argP1 != newArgs.end() && *(argP1) == "OR" &&
|
|
argP2 != newArgs.end())
|
|
{
|
|
def = cmIfCommand::GetVariableOrNumber(arg->c_str(), makefile);
|
|
def2 = cmIfCommand::GetVariableOrNumber((argP2)->c_str(), makefile);
|
|
HandleBinaryOp(
|
|
!(cmSystemTools::IsOff(def) && cmSystemTools::IsOff(def2)),
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
++arg;
|
|
}
|
|
}
|
|
while (reducible);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
|
|
//=========================================================================
|
|
// order of operations,
|
|
// 1. ( ) -- parenthetical groups
|
|
// 2. IS_DIRECTORY EXISTS COMMAND DEFINED etc predicates
|
|
// 3. MATCHES LESS GREATER EQUAL STRLESS STRGREATER STREQUAL etc binary ops
|
|
// 4. NOT
|
|
// 5. AND OR
|
|
//
|
|
// There is an issue on whether the arguments should be values of references,
|
|
// for example IF (FOO AND BAR) should that compare the strings FOO and BAR
|
|
// or should it really do IF (${FOO} AND ${BAR}) Currently IS_DIRECTORY
|
|
// EXISTS COMMAND and DEFINED all take values. EQUAL, LESS and GREATER can
|
|
// take numeric values or variable names. STRLESS and STRGREATER take
|
|
// variable names but if the variable name is not found it will use the name
|
|
// directly. AND OR take variables or the values 0 or 1.
|
|
|
|
|
|
bool cmIfCommand::IsTrue(const std::vector<std::string> &args,
|
|
std::string &errorString, cmMakefile *makefile)
|
|
{
|
|
const char *def;
|
|
errorString = "";
|
|
|
|
// handle empty invocation
|
|
if (args.size() < 1)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
// store the reduced args in this vector
|
|
std::list<std::string> newArgs;
|
|
|
|
// copy to the list structure
|
|
for(unsigned int i = 0; i < args.size(); ++i)
|
|
{
|
|
newArgs.push_back(args[i]);
|
|
}
|
|
|
|
// 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
|
|
if (!HandleLevel0(newArgs, makefile, errorString)) // parens
|
|
{
|
|
return false;
|
|
}
|
|
if (!HandleLevel1(newArgs, makefile, errorString)) //predicates
|
|
{
|
|
return false;
|
|
}
|
|
if (!HandleLevel2(newArgs, makefile, errorString)) // binary ops
|
|
{
|
|
return false;
|
|
}
|
|
if (!HandleLevel3(newArgs, makefile, errorString)) // NOT
|
|
{
|
|
return false;
|
|
}
|
|
if (!HandleLevel4(newArgs, makefile, errorString)) // AND OR
|
|
{
|
|
return false;
|
|
}
|
|
|
|
// now at the end there should only be one argument left
|
|
if (newArgs.size() == 1)
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
errorString = "Unknown arguments specified";
|
|
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;
|
|
}
|