CMake/Source/cmIfCommand.cxx

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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
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Copyright (c) 2002 Insight Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
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=========================================================================*/
#include "cmIfCommand.h"
bool cmIfFunctionBlocker::
IsFunctionBlocked(const char *name, const std::vector<std::string> &args,
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cmMakefile &mf)
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{
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// always let if statements through
if (!strcmp(name,"IF"))
{
return false;
}
// 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
// and block this Else Command
if (!strcmp(name,"ELSE"))
{
m_IsBlocking = !m_IsBlocking;
return true;
}
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// otherwise it must be an ENDIF statement, in that case remove the
// function blocker
mf.RemoveFunctionBlocker("ENDIF",args);
return true;
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}
else if(args.empty())
{
std::string err = "Empty arguments for ";
err += name;
err += ". Did you mean ";
err += name;
err += "( ";
for(std::vector<std::string>::const_iterator a = m_Args.begin();
a != m_Args.end();++a)
{
err += *a;
err += " ";
}
err += ")?";
cmSystemTools::Error(err.c_str());
}
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}
return m_IsBlocking;
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}
bool cmIfFunctionBlocker::
ShouldRemove(const char *name, const std::vector<std::string> &args,
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cmMakefile &)
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{
if (!strcmp(name,"ELSE") || !strcmp(name,"ENDIF"))
{
if (args == m_Args)
{
return true;
}
}
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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const char* versionValue
= mf.GetDefinition("CMAKE_MINIMUM_REQUIRED_VERSION");
if (!versionValue || (atof(versionValue) <= 1.4))
{
return;
}
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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: ";
errmsg += mf.GetCurrentDirectory();
errmsg += "\nThe arguments are: ";
for(std::vector<std::string>::const_iterator j = m_Args.begin();
j != m_Args.end(); ++j)
{
errmsg += *j;
errmsg += " ";
}
cmSystemTools::Error(errmsg.c_str());
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}
bool cmIfCommand::InitialPass(std::vector<std::string> const& args)
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{
bool isValid;
bool isTrue = cmIfCommand::IsTrue(args,isValid,m_Makefile);
if (!isValid)
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{
this->SetError("An IF command had incorrect arguments");
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return false;
}
cmIfFunctionBlocker *f = new cmIfFunctionBlocker();
// if is isn't true block the commands
f->m_IsBlocking = !isTrue;
for(std::vector<std::string>::const_iterator j = args.begin();
j != args.end(); ++j)
{
f->m_Args.push_back(*j);
}
m_Makefile->AddFunctionBlocker(f);
return true;
}
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bool cmIfCommand::IsTrue(const std::vector<std::string> &args, bool &isValid,
const cmMakefile *makefile)
{
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// check for the different signatures
bool isTrue = true;
isValid = false;
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const char *def;
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const char *def2;
if(args.size() < 1 )
{
isValid = true;
return false;
}
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if (args.size() == 1)
{
def = makefile->GetDefinition(args[0].c_str());
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if(cmSystemTools::IsOff(def))
{
isTrue = false;
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}
isValid = true;
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}
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if (args.size() == 2 && (args[0] == "NOT"))
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{
def = makefile->GetDefinition(args[1].c_str());
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if(!cmSystemTools::IsOff(def))
{
isTrue = false;
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}
isValid = true;
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}
if (args.size() == 2 && (args[0] == "COMMAND"))
{
if(!makefile->CommandExists(args[1].c_str()))
{
isTrue = false;
}
isValid = true;
}
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if (args.size() == 2 && (args[0] == "EXISTS"))
{
if(!cmSystemTools::FileExists(args[1].c_str()))
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{
isTrue = false;
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}
isValid = true;
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}
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if (args.size() == 3 && (args[1] == "AND"))
{
def = makefile->GetDefinition(args[0].c_str());
def2 = makefile->GetDefinition(args[2].c_str());
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if(cmSystemTools::IsOff(def) || cmSystemTools::IsOff(def2))
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{
isTrue = false;
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}
isValid = true;
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}
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if (args.size() == 3 && (args[1] == "OR"))
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{
def = makefile->GetDefinition(args[0].c_str());
def2 = makefile->GetDefinition(args[2].c_str());
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if(cmSystemTools::IsOff(def) && cmSystemTools::IsOff(def2))
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{
isTrue = false;
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}
isValid = true;
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}
if (args.size() == 3 && (args[1] == "MATCHES"))
{
def = cmIfCommand::GetVariableOrString(args[0].c_str(), makefile);
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cmRegularExpression regEntry(args[2].c_str());
// check for black line or comment
if (!regEntry.find(def))
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{
isTrue = false;
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}
isValid = true;
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}
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if (args.size() == 3 && (args[1] == "LESS"))
{
def = cmIfCommand::GetVariableOrString(args[0].c_str(), makefile);
def2 = cmIfCommand::GetVariableOrString(args[2].c_str(), makefile);
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if (!def)
{
def = args[0].c_str();
}
if (!def2)
{
def2 = args[2].c_str();
}
if(atof(def) >= atof(def2))
{
isTrue = false;
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}
isValid = true;
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}
if (args.size() == 3 && (args[1] == "GREATER"))
{
def = cmIfCommand::GetVariableOrString(args[0].c_str(), makefile);
def2 = cmIfCommand::GetVariableOrString(args[2].c_str(), makefile);
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if(atof(def) <= atof(def2))
{
isTrue = false;
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}
isValid = true;
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}
if (args.size() == 3 && (args[1] == "STRLESS"))
{
def = cmIfCommand::GetVariableOrString(args[0].c_str(), makefile);
def2 = cmIfCommand::GetVariableOrString(args[2].c_str(), makefile);
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if(strcmp(def,def2) >= 0)
{
isTrue = false;
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}
isValid = true;
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}
if (args.size() == 3 && (args[1] == "STRGREATER"))
{
def = cmIfCommand::GetVariableOrString(args[0].c_str(), makefile);
def2 = cmIfCommand::GetVariableOrString(args[2].c_str(), makefile);
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if(strcmp(def,def2) <= 0)
{
isTrue = false;
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}
isValid = true;
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}
return isTrue;
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}
const char* cmIfCommand::GetVariableOrString(const char* str,
const cmMakefile* mf)
{
const char* def = mf->GetDefinition(str);
if(!def)
{
def = str;
}
return def;
}