CMake/Source/cmWhileCommand.cxx

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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt 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 License for more information.
============================================================================*/
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#include "cmWhileCommand.h"
#include "cmConditionEvaluator.h"
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cmWhileFunctionBlocker::cmWhileFunctionBlocker(cmMakefile* mf)
: Makefile(mf)
, Depth(0)
{
this->Makefile->PushLoopBlock();
}
cmWhileFunctionBlocker::~cmWhileFunctionBlocker()
{
this->Makefile->PopLoopBlock();
}
bool cmWhileFunctionBlocker::IsFunctionBlocked(const cmListFileFunction& lff,
cmMakefile& mf,
cmExecutionStatus& inStatus)
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{
// at end of for each execute recorded commands
if (!cmSystemTools::Strucmp(lff.Name.c_str(), "while")) {
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// record the number of while commands past this one
this->Depth++;
} else if (!cmSystemTools::Strucmp(lff.Name.c_str(), "endwhile")) {
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// if this is the endwhile for this while loop then execute
if (!this->Depth) {
// Remove the function blocker for this scope or bail.
CM_AUTO_PTR<cmFunctionBlocker> fb(mf.RemoveFunctionBlocker(this, lff));
if (!fb.get()) {
return false;
}
std::string errorString;
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std::vector<cmExpandedCommandArgument> expandedArguments;
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mf.ExpandArguments(this->Args, expandedArguments);
cmake::MessageType messageType;
cmListFileContext execContext = this->GetStartingContext();
cmCommandContext commandContext;
commandContext.Line = execContext.Line;
commandContext.Name = execContext.Name;
cmConditionEvaluator conditionEvaluator(mf, this->GetStartingContext(),
mf.GetBacktrace(commandContext));
bool isTrue =
conditionEvaluator.IsTrue(expandedArguments, errorString, messageType);
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while (isTrue) {
if (!errorString.empty()) {
std::string err = "had incorrect arguments: ";
unsigned int i;
for (i = 0; i < this->Args.size(); ++i) {
err += (this->Args[i].Delim ? "\"" : "");
err += this->Args[i].Value;
err += (this->Args[i].Delim ? "\"" : "");
err += " ";
}
err += "(";
err += errorString;
err += ").";
mf.IssueMessage(messageType, err);
if (messageType == cmake::FATAL_ERROR) {
cmSystemTools::SetFatalErrorOccured();
return true;
}
}
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// Invoke all the functions that were collected in the block.
for (unsigned int c = 0; c < this->Functions.size(); ++c) {
cmExecutionStatus status;
mf.ExecuteCommand(this->Functions[c], status);
if (status.GetReturnInvoked()) {
inStatus.SetReturnInvoked(true);
return true;
}
if (status.GetBreakInvoked()) {
return true;
}
if (status.GetContinueInvoked()) {
break;
}
if (cmSystemTools::GetFatalErrorOccured()) {
return true;
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}
}
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expandedArguments.clear();
mf.ExpandArguments(this->Args, expandedArguments);
isTrue = conditionEvaluator.IsTrue(expandedArguments, errorString,
messageType);
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}
return true;
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}
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// decrement for each nested while that ends
this->Depth--;
}
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// record the command
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this->Functions.push_back(lff);
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// always return true
return true;
}
bool cmWhileFunctionBlocker::ShouldRemove(const cmListFileFunction& lff,
cmMakefile&)
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{
if (!cmSystemTools::Strucmp(lff.Name.c_str(), "endwhile")) {
// if the endwhile has arguments, then make sure
// they match the arguments of the matching while
if (lff.Arguments.empty() || lff.Arguments == this->Args) {
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return true;
}
}
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return false;
}
bool cmWhileCommand::InvokeInitialPass(
const std::vector<cmListFileArgument>& args, cmExecutionStatus&)
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{
if (args.empty()) {
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this->SetError("called with incorrect number of arguments");
return false;
}
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// create a function blocker
cmWhileFunctionBlocker* f = new cmWhileFunctionBlocker(this->Makefile);
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f->Args = args;
this->Makefile->AddFunctionBlocker(f);
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return true;
}