565 lines
15 KiB
C++
565 lines
15 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 <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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{
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// always let if statements through
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if (cmSystemTools::LowerCase(lff.Name) == "if")
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{
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return false;
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}
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// watch for our ELSE or ENDIF
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if (cmSystemTools::LowerCase(lff.Name) == "else" ||
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cmSystemTools::LowerCase(lff.Name) == "endif")
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{
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// if it was an else statement then we should change state
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// and block this Else Command
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if (cmSystemTools::LowerCase(lff.Name) == "else")
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{
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this->IsBlocking = !this->IsBlocking;
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return true;
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}
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// otherwise it must be an ENDIF statement, in that case remove the
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// function blocker
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mf.RemoveFunctionBlocker(lff);
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return true;
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}
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return this->IsBlocking;
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}
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bool cmIfFunctionBlocker::ShouldRemove(const cmListFileFunction& lff,
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cmMakefile& mf)
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{
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if (cmSystemTools::LowerCase(lff.Name) == "endif")
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{
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if (mf.IsOn("CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS")
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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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{
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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->IsBlocking = !isTrue;
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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, const 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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// this is a super ugly hack. Basically old versiosn of VTK and ITK have a
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// bad test to check for more recent versions of CMake in the
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// CMakeLists.txt file for libtiff. So when we reved CMake up to 2.0 the
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// test started failing because the minor version went to zero this causes
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// the test to pass
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if (args.size() == 3 &&
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(makefile->GetDefinition("VTKTIFF_SOURCE_DIR") ||
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makefile->GetDefinition("ITKTIFF_SOURCE_DIR")) &&
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args[0] == "CMAKE_MINOR_VERSION" &&
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args[1] == "MATCHES")
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{
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delete [] *errorString;
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*errorString = 0;
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return true;
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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 file 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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// 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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// 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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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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def = cmSystemTools::GetEnv(env.c_str());
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}
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else
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{
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def = makefile->GetDefinition((argP1)->c_str());
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}
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if(def)
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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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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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*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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if (*(argP1) == "LESS")
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{
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if(atof(def) < atof(def2))
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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(atof(def) > atof(def2))
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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(atof(def) == atof(def2))
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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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++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() && *arg == "NOT")
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{
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def = cmIfCommand::GetVariableOrNumber((argP1)->c_str(), makefile);
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if(!cmSystemTools::IsOff(def))
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{
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*arg = "0";
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}
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else
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{
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*arg = "1";
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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() && *(argP1) == "AND" &&
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argP2 != newArgs.end())
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{
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def = cmIfCommand::GetVariableOrNumber(arg->c_str(), makefile);
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def2 = cmIfCommand::GetVariableOrNumber((argP2)->c_str(), makefile);
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if(cmSystemTools::IsOff(def) || cmSystemTools::IsOff(def2))
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{
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*arg = "0";
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}
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else
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{
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*arg = "1";
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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() && *(argP1) == "OR" &&
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argP2 != newArgs.end())
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{
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def = cmIfCommand::GetVariableOrNumber(arg->c_str(), makefile);
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def2 = cmIfCommand::GetVariableOrNumber((argP2)->c_str(), makefile);
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if(cmSystemTools::IsOff(def) && cmSystemTools::IsOff(def2))
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{
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*arg = "0";
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}
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else
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{
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*arg = "1";
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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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++arg;
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}
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}
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while (reducible);
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// now at the end there should only be one argument left
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if (newArgs.size() == 1)
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{
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delete [] *errorString;
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*errorString = 0;
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if (*newArgs.begin() == "0")
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{
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return false;
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}
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if (*newArgs.begin() == "1")
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{
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return true;
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}
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def = makefile->GetDefinition(args[0].c_str());
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if(cmSystemTools::IsOff(def))
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{
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return false;
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}
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}
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return true;
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}
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const char* cmIfCommand::GetVariableOrString(const char* str,
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const cmMakefile* mf)
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{
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const char* def = mf->GetDefinition(str);
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if(!def)
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{
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def = str;
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}
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return def;
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}
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const char* cmIfCommand::GetVariableOrNumber(const char* str,
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const cmMakefile* mf)
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{
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const char* def = mf->GetDefinition(str);
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if(!def)
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{
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if (atoi(str))
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{
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def = str;
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}
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}
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return def;
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}
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