468 lines
12 KiB
C++
468 lines
12 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 <deque>
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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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const char* name = lff.m_Name.c_str();
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const std::vector<cmListFileArgument>& args = lff.m_Arguments;
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// always let if statements through
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if (!strcmp(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 (!strcmp(name,"ELSE") || !strcmp(name,"ENDIF"))
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{
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if (args == m_Args)
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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 (!strcmp(name,"ELSE"))
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{
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m_IsBlocking = !m_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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else if(args.empty())
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{
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std::string err = "Empty arguments for ";
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err += name;
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err += ". Did you mean ";
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err += name;
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err += "( ";
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for(std::vector<cmListFileArgument>::const_iterator a = m_Args.begin();
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a != m_Args.end();++a)
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{
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err += (a->Quoted?"\"":"");
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err += a->Value;
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err += (a->Quoted?"\"":"");
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err += " ";
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}
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err += ")?";
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cmSystemTools::Error(err.c_str());
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}
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}
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return m_IsBlocking;
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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 (lff.m_Name == "ENDIF")
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{
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if (lff.m_Arguments == m_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 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 = m_Args.begin();
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j != m_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::InvokeInitialPass(const std::vector<cmListFileArgument>& args)
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{
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bool isValid;
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std::vector<std::string> expandedArguments;
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m_Makefile->ExpandArguments(args, expandedArguments);
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bool isTrue = cmIfCommand::IsTrue(expandedArguments,isValid,m_Makefile);
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if (!isValid)
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{
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std::string err = "An IF command 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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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->m_IsBlocking = !isTrue;
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f->m_Args = args;
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m_Makefile->AddFunctionBlocker(f);
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return true;
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}
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// order of operations,
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// EXISTS COMMAND DEFINED
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// MATCHES LESS GREATER EQUAL STRLESS STRGREATER
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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 EXISTS COMMAND and
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// DEFINED all take values. EQUAL, LESS and GREATER can take numeric values or
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// variable names. STRLESS and STRGREATER take variable names but if the
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// variable name is not found it will use the name directly. AND OR take
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// variables or the values 0 or 1.
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bool cmIfCommand::IsTrue(const std::vector<std::string> &args,
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bool &isValid, const cmMakefile *makefile)
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{
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// check for the different signatures
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isValid = false;
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const char *def;
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const char *def2;
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// handle empty invocation
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if (args.size() < 1)
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{
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isValid = true;
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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::deque<std::string> newArgs;
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int reducible = 1;
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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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// 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::deque<std::string>::iterator arg = newArgs.begin();
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while (arg != newArgs.end())
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{
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// does a file exist
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if (*arg == "EXISTS" && arg + 1 != newArgs.end())
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{
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if(cmSystemTools::FileExists((arg + 1)->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(arg+1);
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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" && arg + 1 != newArgs.end())
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{
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if(makefile->CommandExists((arg + 1)->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(arg+1);
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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" && arg + 1 != newArgs.end())
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{
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def = makefile->GetDefinition((arg + 1)->c_str());
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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(arg+1);
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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::deque<std::string>::iterator arg = newArgs.begin();
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while (arg != newArgs.end())
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{
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if (arg + 1 != newArgs.end() && arg + 2 != newArgs.end() &&
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*(arg + 1) == "MATCHES")
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{
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def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
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cmsys::RegularExpression regEntry((arg+2)->c_str());
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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(arg+2);
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newArgs.erase(arg+1);
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reducible = 1;
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}
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if (arg + 1 != newArgs.end() && *arg == "MATCHES")
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{
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*arg = "0";
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newArgs.erase(arg+1);
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reducible = 1;
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}
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if (arg + 1 != newArgs.end() && arg + 2 != newArgs.end() &&
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(*(arg + 1) == "LESS" || *(arg + 1) == "GREATER" ||
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*(arg + 1) == "EQUAL"))
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{
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def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
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def2 = cmIfCommand::GetVariableOrString((arg + 2)->c_str(), makefile);
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if (*(arg + 1) == "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 (*(arg + 1) == "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(arg+2);
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newArgs.erase(arg+1);
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reducible = 1;
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}
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if (arg + 1 != newArgs.end() && arg + 2 != newArgs.end() &&
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(*(arg + 1) == "STRLESS" || *(arg + 1) == "STRGREATER"))
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{
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def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
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def2 = cmIfCommand::GetVariableOrString((arg + 2)->c_str(), makefile);
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if (*(arg + 1) == "STRLESS")
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{
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if(strcmp(def,def2) < 0)
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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(strcmp(def,def2) > 0)
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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(arg+2);
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newArgs.erase(arg+1);
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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::deque<std::string>::iterator arg = newArgs.begin();
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while (arg != newArgs.end())
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{
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if (arg + 1 != newArgs.end() && *arg == "NOT")
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{
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def = cmIfCommand::GetVariableOrNumber((arg + 1)->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(arg+1);
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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::deque<std::string>::iterator arg = newArgs.begin();
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while (arg != newArgs.end())
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{
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if (arg + 1 != newArgs.end() && *(arg + 1) == "AND" &&
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arg + 2 != newArgs.end())
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{
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def = cmIfCommand::GetVariableOrNumber(arg->c_str(), makefile);
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def2 = cmIfCommand::GetVariableOrNumber((arg + 2)->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(arg+2);
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newArgs.erase(arg+1);
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reducible = 1;
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}
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if (arg + 1 != newArgs.end() && *(arg + 1) == "OR" &&
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arg + 2 != newArgs.end())
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{
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def = cmIfCommand::GetVariableOrNumber(arg->c_str(), makefile);
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def2 = cmIfCommand::GetVariableOrNumber((arg + 2)->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(arg+2);
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newArgs.erase(arg+1);
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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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isValid = true;
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if (newArgs[0] == "0")
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{
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return false;
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}
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if (newArgs[0] == "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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