CMake/Source/cmGeneratorExpression.cxx

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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
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.
============================================================================*/
#include "cmGeneratorExpression.h"
#include "cmMakefile.h"
#include "cmTarget.h"
#include "assert.h"
#include <cmsys/String.h>
#include "cmGeneratorExpressionEvaluator.h"
#include "cmGeneratorExpressionLexer.h"
#include "cmGeneratorExpressionParser.h"
#include "cmGeneratorExpressionDAGChecker.h"
//----------------------------------------------------------------------------
cmGeneratorExpression::cmGeneratorExpression(
cmListFileBacktrace const& backtrace):
Backtrace(backtrace)
{
}
//----------------------------------------------------------------------------
cmsys::auto_ptr<cmCompiledGeneratorExpression>
cmGeneratorExpression::Parse(std::string const& input)
{
return this->Parse(input.c_str());
}
//----------------------------------------------------------------------------
cmsys::auto_ptr<cmCompiledGeneratorExpression>
cmGeneratorExpression::Parse(const char* input)
{
return cmsys::auto_ptr<cmCompiledGeneratorExpression>(
new cmCompiledGeneratorExpression(
this->Backtrace,
input));
}
cmGeneratorExpression::~cmGeneratorExpression()
{
}
//----------------------------------------------------------------------------
const char *cmCompiledGeneratorExpression::Evaluate(
cmMakefile* mf, const char* config, bool quiet,
cmTarget *headTarget,
cmGeneratorExpressionDAGChecker *dagChecker) const
{
return this->Evaluate(mf,
config,
quiet,
headTarget,
headTarget,
dagChecker);
}
//----------------------------------------------------------------------------
const char *cmCompiledGeneratorExpression::Evaluate(
cmMakefile* mf, const char* config, bool quiet,
cmTarget *headTarget,
cmTarget *currentTarget,
cmGeneratorExpressionDAGChecker *dagChecker) const
{
if (!this->NeedsParsing)
{
return this->Input.c_str();
}
this->Output = "";
std::vector<cmGeneratorExpressionEvaluator*>::const_iterator it
= this->Evaluators.begin();
const std::vector<cmGeneratorExpressionEvaluator*>::const_iterator end
= this->Evaluators.end();
cmGeneratorExpressionContext context;
context.Makefile = mf;
context.Config = config;
context.Quiet = quiet;
context.HadError = false;
context.HeadTarget = headTarget;
context.CurrentTarget = currentTarget ? currentTarget : headTarget;
context.Backtrace = this->Backtrace;
for ( ; it != end; ++it)
{
const std::string result = (*it)->Evaluate(&context, dagChecker);
this->Output += result;
for(std::set<cmStdString>::const_iterator
p = context.SeenTargetProperties.begin();
p != context.SeenTargetProperties.end(); ++p)
{
this->SeenTargetProperties[*p] += result + ";";
}
if (context.HadError)
{
this->Output = "";
break;
}
}
this->Targets = context.Targets;
// TODO: Return a std::string from here instead?
return this->Output.c_str();
}
cmCompiledGeneratorExpression::cmCompiledGeneratorExpression(
cmListFileBacktrace const& backtrace,
const char *input)
: Backtrace(backtrace), Input(input ? input : "")
{
cmGeneratorExpressionLexer l;
std::vector<cmGeneratorExpressionToken> tokens =
l.Tokenize(this->Input.c_str());
this->NeedsParsing = l.GetSawGeneratorExpression();
if (this->NeedsParsing)
{
cmGeneratorExpressionParser p(tokens);
p.Parse(this->Evaluators);
}
}
//----------------------------------------------------------------------------
cmCompiledGeneratorExpression::~cmCompiledGeneratorExpression()
{
std::vector<cmGeneratorExpressionEvaluator*>::const_iterator it
= this->Evaluators.begin();
const std::vector<cmGeneratorExpressionEvaluator*>::const_iterator end
= this->Evaluators.end();
for ( ; it != end; ++it)
{
delete *it;
}
}
//----------------------------------------------------------------------------
static std::string stripAllGeneratorExpressions(const std::string &input)
{
std::string result;
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
while((pos = input.find("$<", lastPos)) != input.npos)
{
result += input.substr(lastPos, pos - lastPos);
pos += 2;
int nestingLevel = 1;
const char *c = input.c_str() + pos;
const char * const cStart = c;
for ( ; *c; ++c)
{
if(c[0] == '$' && c[1] == '<')
{
++nestingLevel;
++c;
continue;
}
if(c[0] == '>')
{
--nestingLevel;
if (nestingLevel == 0)
{
break;
}
}
}
const std::string::size_type traversed = (c - cStart) + 1;
if (!*c)
{
result += "$<" + input.substr(pos, traversed);
}
pos += traversed;
lastPos = pos;
}
result += input.substr(lastPos);
return result;
}
//----------------------------------------------------------------------------
static std::string stripExportInterface(const std::string &input,
cmGeneratorExpression::PreprocessContext context)
{
std::string result;
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
while((pos = input.find("$<BUILD_INTERFACE:", lastPos)) != input.npos
|| (pos = input.find("$<INSTALL_INTERFACE:", lastPos)) != input.npos)
{
result += input.substr(lastPos, pos - lastPos);
const bool gotInstallInterface = input[pos + 2] == 'I';
pos += gotInstallInterface ? sizeof("$<INSTALL_INTERFACE:") - 1
: sizeof("$<BUILD_INTERFACE:") - 1;
int nestingLevel = 1;
const char *c = input.c_str() + pos;
const char * const cStart = c;
for ( ; *c; ++c)
{
if(c[0] == '$' && c[1] == '<')
{
++nestingLevel;
++c;
continue;
}
if(c[0] == '>')
{
--nestingLevel;
if (nestingLevel != 0)
{
continue;
}
if(context == cmGeneratorExpression::BuildInterface
&& !gotInstallInterface)
{
result += input.substr(pos, c - cStart);
}
else if(context == cmGeneratorExpression::InstallInterface
&& gotInstallInterface)
{
result += input.substr(pos, c - cStart);
}
break;
}
}
const std::string::size_type traversed = (c - cStart) + 1;
if (!*c)
{
result += std::string(gotInstallInterface ? "$<INSTALL_INTERFACE:"
: "$<BUILD_INTERFACE:")
+ input.substr(pos, traversed);
}
pos += traversed;
lastPos = pos;
}
result += input.substr(lastPos);
return result;
}
//----------------------------------------------------------------------------
void cmGeneratorExpression::Split(const std::string &input,
std::vector<std::string> &output)
{
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
while((pos = input.find("$<", lastPos)) != input.npos)
{
std::string part = input.substr(lastPos, pos - lastPos);
std::string preGenex;
if (!part.empty())
{
std::string::size_type startPos = input.rfind(";", pos);
if (startPos != pos - 1 && startPos >= lastPos)
{
part = input.substr(lastPos, startPos - lastPos);
preGenex = input.substr(startPos + 1, pos - startPos - 1);
}
cmSystemTools::ExpandListArgument(part.c_str(), output);
}
pos += 2;
int nestingLevel = 1;
const char *c = input.c_str() + pos;
const char * const cStart = c;
for ( ; *c; ++c)
{
if(c[0] == '$' && c[1] == '<')
{
++nestingLevel;
++c;
continue;
}
if(c[0] == '>')
{
--nestingLevel;
if (nestingLevel == 0)
{
break;
}
}
}
for ( ; *c; ++c)
{
// Capture the part after the genex and before the next ';'
if(c[0] == ';')
{
--c;
break;
}
}
const std::string::size_type traversed = (c - cStart) + 1;
output.push_back(preGenex + "$<" + input.substr(pos, traversed));
pos += traversed;
lastPos = pos;
}
if (lastPos < input.size())
{
cmSystemTools::ExpandListArgument(input.substr(lastPos), output);
}
}
//----------------------------------------------------------------------------
std::string cmGeneratorExpression::Preprocess(const std::string &input,
PreprocessContext context)
{
if (context == StripAllGeneratorExpressions)
{
return stripAllGeneratorExpressions(input);
}
else if (context == BuildInterface || context == InstallInterface)
{
return stripExportInterface(input, context);
}
assert(!"cmGeneratorExpression::Preprocess called with invalid args");
return std::string();
}