396 lines
12 KiB
C++
396 lines
12 KiB
C++
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#include "cmGeneratorExpression.h"
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#include "assert.h"
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#include "cmAlgorithms.h"
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#include "cmGeneratorExpressionContext.h"
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#include "cmGeneratorExpressionEvaluator.h"
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#include "cmGeneratorExpressionLexer.h"
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#include "cmGeneratorExpressionParser.h"
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#include "cmSystemTools.h"
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#include <cmsys/RegularExpression.hxx>
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#include <utility>
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cmGeneratorExpression::cmGeneratorExpression(
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const cmListFileBacktrace& backtrace)
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: Backtrace(backtrace)
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{
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}
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CM_AUTO_PTR<cmCompiledGeneratorExpression> cmGeneratorExpression::Parse(
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std::string const& input)
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{
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return CM_AUTO_PTR<cmCompiledGeneratorExpression>(
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new cmCompiledGeneratorExpression(this->Backtrace, input));
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}
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CM_AUTO_PTR<cmCompiledGeneratorExpression> cmGeneratorExpression::Parse(
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const char* input)
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{
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return this->Parse(std::string(input ? input : ""));
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}
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cmGeneratorExpression::~cmGeneratorExpression()
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{
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}
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const char* cmCompiledGeneratorExpression::Evaluate(
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cmLocalGenerator* lg, const std::string& config, bool quiet,
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const cmGeneratorTarget* headTarget,
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cmGeneratorExpressionDAGChecker* dagChecker,
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std::string const& language) const
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{
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return this->Evaluate(lg, config, quiet, headTarget, headTarget, dagChecker,
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language);
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}
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const char* cmCompiledGeneratorExpression::Evaluate(
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cmLocalGenerator* lg, const std::string& config, bool quiet,
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const cmGeneratorTarget* headTarget, const cmGeneratorTarget* currentTarget,
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cmGeneratorExpressionDAGChecker* dagChecker,
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std::string const& language) const
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{
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cmGeneratorExpressionContext context(
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lg, config, quiet, headTarget, currentTarget ? currentTarget : headTarget,
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this->EvaluateForBuildsystem, this->Backtrace, language);
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return this->EvaluateWithContext(context, dagChecker);
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}
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const char* cmCompiledGeneratorExpression::EvaluateWithContext(
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cmGeneratorExpressionContext& context,
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cmGeneratorExpressionDAGChecker* dagChecker) const
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{
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if (!this->NeedsEvaluation) {
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return this->Input.c_str();
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}
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this->Output = "";
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std::vector<cmGeneratorExpressionEvaluator*>::const_iterator it =
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this->Evaluators.begin();
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const std::vector<cmGeneratorExpressionEvaluator*>::const_iterator end =
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this->Evaluators.end();
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for (; it != end; ++it) {
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this->Output += (*it)->Evaluate(&context, dagChecker);
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this->SeenTargetProperties.insert(context.SeenTargetProperties.begin(),
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context.SeenTargetProperties.end());
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if (context.HadError) {
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this->Output = "";
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break;
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}
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}
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this->MaxLanguageStandard = context.MaxLanguageStandard;
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if (!context.HadError) {
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this->HadContextSensitiveCondition = context.HadContextSensitiveCondition;
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this->HadHeadSensitiveCondition = context.HadHeadSensitiveCondition;
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this->SourceSensitiveTargets = context.SourceSensitiveTargets;
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}
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this->DependTargets = context.DependTargets;
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this->AllTargetsSeen = context.AllTargets;
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// TODO: Return a std::string from here instead?
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return this->Output.c_str();
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}
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cmCompiledGeneratorExpression::cmCompiledGeneratorExpression(
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cmListFileBacktrace const& backtrace, const std::string& input)
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: Backtrace(backtrace)
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, Input(input)
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, HadContextSensitiveCondition(false)
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, HadHeadSensitiveCondition(false)
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, EvaluateForBuildsystem(false)
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{
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cmGeneratorExpressionLexer l;
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std::vector<cmGeneratorExpressionToken> tokens = l.Tokenize(this->Input);
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this->NeedsEvaluation = l.GetSawGeneratorExpression();
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if (this->NeedsEvaluation) {
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cmGeneratorExpressionParser p(tokens);
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p.Parse(this->Evaluators);
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}
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}
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cmCompiledGeneratorExpression::~cmCompiledGeneratorExpression()
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{
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cmDeleteAll(this->Evaluators);
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}
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std::string cmGeneratorExpression::StripEmptyListElements(
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const std::string& input)
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{
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if (input.find(';') == input.npos) {
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return input;
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}
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std::string result;
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result.reserve(input.size());
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const char* c = input.c_str();
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const char* last = c;
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bool skipSemiColons = true;
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for (; *c; ++c) {
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if (*c == ';') {
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if (skipSemiColons) {
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result.append(last, c - last);
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last = c + 1;
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}
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skipSemiColons = true;
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} else {
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skipSemiColons = false;
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}
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}
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result.append(last);
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if (!result.empty() && *(result.end() - 1) == ';') {
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result.resize(result.size() - 1);
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}
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return result;
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}
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static std::string stripAllGeneratorExpressions(const std::string& input)
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{
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std::string result;
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std::string::size_type pos = 0;
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std::string::size_type lastPos = pos;
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int nestingLevel = 0;
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while ((pos = input.find("$<", lastPos)) != input.npos) {
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result += input.substr(lastPos, pos - lastPos);
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pos += 2;
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nestingLevel = 1;
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const char* c = input.c_str() + pos;
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const char* const cStart = c;
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for (; *c; ++c) {
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if (c[0] == '$' && c[1] == '<') {
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++nestingLevel;
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++c;
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continue;
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}
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if (c[0] == '>') {
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--nestingLevel;
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if (nestingLevel == 0) {
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break;
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}
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}
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}
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const std::string::size_type traversed = (c - cStart) + 1;
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if (!*c) {
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result += "$<" + input.substr(pos, traversed);
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}
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pos += traversed;
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lastPos = pos;
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}
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if (nestingLevel == 0) {
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result += input.substr(lastPos);
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}
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return cmGeneratorExpression::StripEmptyListElements(result);
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}
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static void prefixItems(const std::string& content, std::string& result,
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const std::string& prefix)
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{
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std::vector<std::string> entries;
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cmGeneratorExpression::Split(content, entries);
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const char* sep = "";
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for (std::vector<std::string>::const_iterator ei = entries.begin();
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ei != entries.end(); ++ei) {
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result += sep;
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sep = ";";
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if (!cmSystemTools::FileIsFullPath(ei->c_str()) &&
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cmGeneratorExpression::Find(*ei) != 0) {
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result += prefix;
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}
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result += *ei;
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}
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}
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static std::string stripExportInterface(
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const std::string& input, cmGeneratorExpression::PreprocessContext context,
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bool resolveRelative)
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{
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std::string result;
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int nestingLevel = 0;
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std::string::size_type pos = 0;
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std::string::size_type lastPos = pos;
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while (true) {
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std::string::size_type bPos = input.find("$<BUILD_INTERFACE:", lastPos);
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std::string::size_type iPos = input.find("$<INSTALL_INTERFACE:", lastPos);
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if (bPos == std::string::npos && iPos == std::string::npos) {
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break;
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}
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if (bPos == std::string::npos) {
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pos = iPos;
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} else if (iPos == std::string::npos) {
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pos = bPos;
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} else {
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pos = (bPos < iPos) ? bPos : iPos;
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}
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result += input.substr(lastPos, pos - lastPos);
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const bool gotInstallInterface = input[pos + 2] == 'I';
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pos += gotInstallInterface ? sizeof("$<INSTALL_INTERFACE:") - 1
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: sizeof("$<BUILD_INTERFACE:") - 1;
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nestingLevel = 1;
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const char* c = input.c_str() + pos;
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const char* const cStart = c;
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for (; *c; ++c) {
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if (c[0] == '$' && c[1] == '<') {
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++nestingLevel;
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++c;
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continue;
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}
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if (c[0] == '>') {
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--nestingLevel;
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if (nestingLevel != 0) {
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continue;
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}
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if (context == cmGeneratorExpression::BuildInterface &&
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!gotInstallInterface) {
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result += input.substr(pos, c - cStart);
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} else if (context == cmGeneratorExpression::InstallInterface &&
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gotInstallInterface) {
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const std::string content = input.substr(pos, c - cStart);
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if (resolveRelative) {
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prefixItems(content, result, "${_IMPORT_PREFIX}/");
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} else {
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result += content;
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}
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}
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break;
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}
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}
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const std::string::size_type traversed = (c - cStart) + 1;
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if (!*c) {
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result += std::string(gotInstallInterface ? "$<INSTALL_INTERFACE:"
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: "$<BUILD_INTERFACE:") +
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input.substr(pos, traversed);
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}
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pos += traversed;
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lastPos = pos;
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}
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if (nestingLevel == 0) {
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result += input.substr(lastPos);
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}
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return cmGeneratorExpression::StripEmptyListElements(result);
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}
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void cmGeneratorExpression::Split(const std::string& input,
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std::vector<std::string>& output)
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{
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std::string::size_type pos = 0;
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std::string::size_type lastPos = pos;
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while ((pos = input.find("$<", lastPos)) != input.npos) {
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std::string part = input.substr(lastPos, pos - lastPos);
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std::string preGenex;
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if (!part.empty()) {
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std::string::size_type startPos = input.rfind(';', pos);
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if (startPos == std::string::npos) {
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preGenex = part;
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part = "";
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} else if (startPos != pos - 1 && startPos >= lastPos) {
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part = input.substr(lastPos, startPos - lastPos);
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preGenex = input.substr(startPos + 1, pos - startPos - 1);
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}
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if (!part.empty()) {
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cmSystemTools::ExpandListArgument(part, output);
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}
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}
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pos += 2;
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int nestingLevel = 1;
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const char* c = input.c_str() + pos;
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const char* const cStart = c;
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for (; *c; ++c) {
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if (c[0] == '$' && c[1] == '<') {
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++nestingLevel;
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++c;
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continue;
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}
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if (c[0] == '>') {
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--nestingLevel;
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if (nestingLevel == 0) {
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break;
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}
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}
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}
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for (; *c; ++c) {
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// Capture the part after the genex and before the next ';'
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if (c[0] == ';') {
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--c;
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break;
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}
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}
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const std::string::size_type traversed = (c - cStart) + 1;
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output.push_back(preGenex + "$<" + input.substr(pos, traversed));
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pos += traversed;
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lastPos = pos;
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}
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if (lastPos < input.size()) {
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cmSystemTools::ExpandListArgument(input.substr(lastPos), output);
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}
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}
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std::string cmGeneratorExpression::Preprocess(const std::string& input,
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PreprocessContext context,
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bool resolveRelative)
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{
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if (context == StripAllGeneratorExpressions) {
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return stripAllGeneratorExpressions(input);
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}
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if (context == BuildInterface || context == InstallInterface) {
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return stripExportInterface(input, context, resolveRelative);
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}
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assert(0 && "cmGeneratorExpression::Preprocess called with invalid args");
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return std::string();
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}
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std::string::size_type cmGeneratorExpression::Find(const std::string& input)
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{
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const std::string::size_type openpos = input.find("$<");
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if (openpos != std::string::npos &&
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input.find('>', openpos) != std::string::npos) {
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return openpos;
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}
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return std::string::npos;
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}
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bool cmGeneratorExpression::IsValidTargetName(const std::string& input)
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{
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// The ':' is supported to allow use with IMPORTED targets. At least
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// Qt 4 and 5 IMPORTED targets use ':' as the namespace delimiter.
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static cmsys::RegularExpression targetNameValidator("^[A-Za-z0-9_.:+-]+$");
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return targetNameValidator.find(input);
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}
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void cmCompiledGeneratorExpression::GetMaxLanguageStandard(
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const cmGeneratorTarget* tgt, std::map<std::string, std::string>& mapping)
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{
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typedef std::map<cmGeneratorTarget const*,
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std::map<std::string, std::string> >
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MapType;
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MapType::const_iterator it = this->MaxLanguageStandard.find(tgt);
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if (it != this->MaxLanguageStandard.end()) {
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mapping = it->second;
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}
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}
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