ceecd7902f
With PushScope and PopScope, keeping track of another bit of data for each scope isn't easy. Instead, store it as another CMake variable so it gets implicitly tracked along with everything else. This works in a revert of commit 7d674b5f0b28a610333644d417c2e8cb796cc9e4.
771 lines
23 KiB
C++
771 lines
23 KiB
C++
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2014 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 "cmConditionEvaluator.h"
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cmConditionEvaluator::cmConditionEvaluator(cmMakefile& makefile):
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Makefile(makefile),
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Policy12Status(makefile.GetPolicyStatus(cmPolicies::CMP0012)),
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Policy54Status(makefile.GetPolicyStatus(cmPolicies::CMP0054))
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{
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}
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//=========================================================================
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// order of operations,
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// 1. ( ) -- parenthetical groups
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// 2. IS_DIRECTORY EXISTS COMMAND DEFINED etc predicates
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// 3. MATCHES LESS GREATER EQUAL STRLESS STRGREATER STREQUAL etc binary ops
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// 4. NOT
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// 5. 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 IS_DIRECTORY
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// EXISTS COMMAND and DEFINED all take values. EQUAL, LESS and GREATER can
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// take numeric values or variable names. STRLESS and STRGREATER take
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// variable names but if the variable name is not found it will use the name
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// directly. AND OR take variables or the values 0 or 1.
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bool cmConditionEvaluator::IsTrue(
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const std::vector<cmExpandedCommandArgument> &args,
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std::string &errorString,
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cmake::MessageType &status)
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{
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errorString = "";
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// handle empty invocation
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if (args.size() < 1)
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{
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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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cmArgumentList newArgs;
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// copy to the list structure
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for(unsigned int 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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// parens
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if (!this->HandleLevel0(newArgs, errorString, status))
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{
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return false;
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}
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//predicates
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if (!this->HandleLevel1(newArgs, errorString, status))
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{
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return false;
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}
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// binary ops
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if (!this->HandleLevel2(newArgs, errorString, status))
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{
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return false;
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}
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// NOT
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if (!this->HandleLevel3(newArgs, errorString, status))
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{
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return false;
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}
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// AND OR
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if (!this->HandleLevel4(newArgs, errorString, status))
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{
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return false;
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}
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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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errorString = "Unknown arguments specified";
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status = cmake::FATAL_ERROR;
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return false;
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}
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return this->GetBooleanValueWithAutoDereference(*(newArgs.begin()),
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errorString, status, true);
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}
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//=========================================================================
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const char* cmConditionEvaluator::GetDefinitionIfUnquoted(
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cmExpandedCommandArgument const& argument) const
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{
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if((this->Policy54Status != cmPolicies::WARN &&
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this->Policy54Status != cmPolicies::OLD) &&
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argument.WasQuoted())
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{
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return 0;
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}
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const char* def = this->Makefile.GetDefinition(argument.GetValue());
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if(def && argument.WasQuoted() && this->Policy54Status == cmPolicies::WARN)
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{
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bool hasBeenReported = this->Makefile.HasCMP0054AlreadyBeenReported(
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this->Makefile.GetBacktrace()[0]);
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if(!hasBeenReported)
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{
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cmOStringStream e;
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e << (this->Makefile.GetPolicies()->GetPolicyWarning(
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cmPolicies::CMP0054)) << "\n";
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e << "Quoted variables like \"" << argument.GetValue() <<
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"\" will no longer be dereferenced "
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"when the policy is set to NEW. "
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"Since the policy is not set the OLD behavior will be used.";
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this->Makefile.IssueMessage(cmake::AUTHOR_WARNING, e.str());
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}
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}
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return def;
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}
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//=========================================================================
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const char* cmConditionEvaluator::GetVariableOrString(
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const cmExpandedCommandArgument& argument) const
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{
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const char* def = this->GetDefinitionIfUnquoted(argument);
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if(!def)
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{
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def = argument.c_str();
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}
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return def;
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}
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//=========================================================================
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bool cmConditionEvaluator::IsKeyword(std::string const& keyword,
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cmExpandedCommandArgument& argument) const
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{
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if((this->Policy54Status != cmPolicies::WARN &&
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this->Policy54Status != cmPolicies::OLD) &&
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argument.WasQuoted())
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{
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return false;
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}
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bool isKeyword = argument.GetValue() == keyword;
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if(isKeyword && argument.WasQuoted() &&
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this->Policy54Status == cmPolicies::WARN)
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{
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bool hasBeenReported = this->Makefile.HasCMP0054AlreadyBeenReported(
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this->Makefile.GetBacktrace()[0]);
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if(!hasBeenReported)
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{
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cmOStringStream e;
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e << (this->Makefile.GetPolicies()->GetPolicyWarning(
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cmPolicies::CMP0054)) << "\n";
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e << "Quoted keywords like \"" << argument.GetValue() <<
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"\" will no longer be interpreted as keywords "
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"when the policy is set to NEW. "
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"Since the policy is not set the OLD behavior will be used.";
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this->Makefile.IssueMessage(cmake::AUTHOR_WARNING, e.str());
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}
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}
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return isKeyword;
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}
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//=========================================================================
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bool cmConditionEvaluator::GetBooleanValue(
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cmExpandedCommandArgument& arg) const
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{
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// Check basic constants.
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if (arg == "0")
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{
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return false;
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}
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if (arg == "1")
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{
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return true;
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}
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// Check named constants.
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if (cmSystemTools::IsOn(arg.c_str()))
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{
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return true;
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}
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if (cmSystemTools::IsOff(arg.c_str()))
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{
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return false;
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}
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// Check for numbers.
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if(!arg.empty())
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{
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char* end;
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double d = strtod(arg.c_str(), &end);
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if(*end == '\0')
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{
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// The whole string is a number. Use C conversion to bool.
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return d? true:false;
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}
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}
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// Check definition.
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const char* def = this->GetDefinitionIfUnquoted(arg);
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return !cmSystemTools::IsOff(def);
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}
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//=========================================================================
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// Boolean value behavior from CMake 2.6.4 and below.
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bool cmConditionEvaluator::GetBooleanValueOld(
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cmExpandedCommandArgument const& arg, bool one) const
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{
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if(one)
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{
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// Old IsTrue behavior for single argument.
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if(arg == "0")
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{ return false; }
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else if(arg == "1")
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{ return true; }
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else
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{
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const char* def = this->GetDefinitionIfUnquoted(arg);
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return !cmSystemTools::IsOff(def);
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}
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}
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else
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{
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// Old GetVariableOrNumber behavior.
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const char* def = this->GetDefinitionIfUnquoted(arg);
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if(!def && atoi(arg.c_str()))
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{
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def = arg.c_str();
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}
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return !cmSystemTools::IsOff(def);
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}
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}
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//=========================================================================
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// returns the resulting boolean value
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bool cmConditionEvaluator::GetBooleanValueWithAutoDereference(
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cmExpandedCommandArgument &newArg,
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std::string &errorString,
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cmake::MessageType &status,
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bool oneArg) const
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{
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// Use the policy if it is set.
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if (this->Policy12Status == cmPolicies::NEW)
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{
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return GetBooleanValue(newArg);
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}
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else if (this->Policy12Status == cmPolicies::OLD)
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{
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return GetBooleanValueOld(newArg, oneArg);
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}
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// Check policy only if old and new results differ.
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bool newResult = this->GetBooleanValue(newArg);
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bool oldResult = this->GetBooleanValueOld(newArg, oneArg);
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if(newResult != oldResult)
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{
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switch(this->Policy12Status)
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{
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case cmPolicies::WARN:
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{
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cmPolicies* policies = this->Makefile.GetPolicies();
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errorString = "An argument named \"" + newArg.GetValue()
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+ "\" appears in a conditional statement. "
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+ policies->GetPolicyWarning(cmPolicies::CMP0012);
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status = cmake::AUTHOR_WARNING;
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}
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case cmPolicies::OLD:
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return oldResult;
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case cmPolicies::REQUIRED_IF_USED:
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case cmPolicies::REQUIRED_ALWAYS:
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{
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cmPolicies* policies = this->Makefile.GetPolicies();
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errorString = "An argument named \"" + newArg.GetValue()
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+ "\" appears in a conditional statement. "
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+ policies->GetRequiredPolicyError(cmPolicies::CMP0012);
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status = cmake::FATAL_ERROR;
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}
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case cmPolicies::NEW:
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break;
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}
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}
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return newResult;
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}
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//=========================================================================
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void cmConditionEvaluator::IncrementArguments(cmArgumentList &newArgs,
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cmArgumentList::iterator &argP1,
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cmArgumentList::iterator &argP2) const
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{
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if (argP1 != newArgs.end())
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{
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argP1++;
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argP2 = argP1;
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if (argP1 != newArgs.end())
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{
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argP2++;
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}
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}
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}
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//=========================================================================
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// helper function to reduce code duplication
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void cmConditionEvaluator::HandlePredicate(bool value, int &reducible,
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cmArgumentList::iterator &arg,
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cmArgumentList &newArgs,
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cmArgumentList::iterator &argP1,
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cmArgumentList::iterator &argP2) const
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{
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if(value)
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{
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*arg = cmExpandedCommandArgument("1", true);
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}
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else
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{
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*arg = cmExpandedCommandArgument("0", true);
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}
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newArgs.erase(argP1);
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argP1 = arg;
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this->IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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//=========================================================================
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// helper function to reduce code duplication
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void cmConditionEvaluator::HandleBinaryOp(bool value, int &reducible,
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cmArgumentList::iterator &arg,
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cmArgumentList &newArgs,
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cmArgumentList::iterator &argP1,
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cmArgumentList::iterator &argP2)
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{
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if(value)
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{
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*arg = cmExpandedCommandArgument("1", true);
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}
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else
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{
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*arg = cmExpandedCommandArgument("0", true);
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}
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newArgs.erase(argP2);
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newArgs.erase(argP1);
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argP1 = arg;
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this->IncrementArguments(newArgs,argP1,argP2);
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reducible = 1;
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}
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//=========================================================================
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// level 0 processes parenthetical expressions
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bool cmConditionEvaluator::HandleLevel0(cmArgumentList &newArgs,
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std::string &errorString,
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cmake::MessageType &status)
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{
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int reducible;
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do
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{
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reducible = 0;
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cmArgumentList::iterator arg = newArgs.begin();
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while (arg != newArgs.end())
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{
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if (IsKeyword("(", *arg))
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{
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// search for the closing paren for this opening one
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cmArgumentList::iterator argClose;
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argClose = arg;
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argClose++;
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unsigned int depth = 1;
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while (argClose != newArgs.end() && depth)
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{
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if (this->IsKeyword("(", *argClose))
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{
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depth++;
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}
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if (this->IsKeyword(")", *argClose))
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{
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depth--;
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}
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argClose++;
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}
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if (depth)
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{
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errorString = "mismatched parenthesis in condition";
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status = cmake::FATAL_ERROR;
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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::vector<cmExpandedCommandArgument> newArgs2;
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// copy to the list structure
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cmArgumentList::iterator argP1 = arg;
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argP1++;
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for(; argP1 != argClose; argP1++)
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{
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newArgs2.push_back(*argP1);
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}
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newArgs2.pop_back();
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// now recursively invoke IsTrue to handle the values inside the
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// parenthetical expression
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bool value =
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this->IsTrue(newArgs2, errorString, status);
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if(value)
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{
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*arg = cmExpandedCommandArgument("1", true);
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}
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else
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{
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*arg = cmExpandedCommandArgument("0", true);
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}
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argP1 = arg;
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argP1++;
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// remove the now evaluated parenthetical expression
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newArgs.erase(argP1,argClose);
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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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return true;
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}
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//=========================================================================
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// level one handles most predicates except for NOT
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bool cmConditionEvaluator::HandleLevel1(cmArgumentList &newArgs,
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std::string &, cmake::MessageType &)
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{
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int reducible;
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do
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{
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reducible = 0;
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cmArgumentList::iterator arg = newArgs.begin();
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cmArgumentList::iterator argP1;
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cmArgumentList::iterator argP2;
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while (arg != newArgs.end())
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{
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argP1 = arg;
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this->IncrementArguments(newArgs,argP1,argP2);
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// does a file exist
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if (this->IsKeyword("EXISTS", *arg) && argP1 != newArgs.end())
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{
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this->HandlePredicate(
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cmSystemTools::FileExists(argP1->c_str()),
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reducible, arg, newArgs, argP1, argP2);
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}
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// does a directory with this name exist
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if (this->IsKeyword("IS_DIRECTORY", *arg) && argP1 != newArgs.end())
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{
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this->HandlePredicate(
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cmSystemTools::FileIsDirectory(argP1->c_str()),
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reducible, arg, newArgs, argP1, argP2);
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}
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// does a symlink with this name exist
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if (this->IsKeyword("IS_SYMLINK", *arg) && argP1 != newArgs.end())
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{
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this->HandlePredicate(
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cmSystemTools::FileIsSymlink(argP1->c_str()),
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reducible, arg, newArgs, argP1, argP2);
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}
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// is the given path an absolute path ?
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if (this->IsKeyword("IS_ABSOLUTE", *arg) && argP1 != newArgs.end())
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{
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this->HandlePredicate(
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cmSystemTools::FileIsFullPath(argP1->c_str()),
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reducible, arg, newArgs, argP1, argP2);
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}
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// does a command exist
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if (this->IsKeyword("COMMAND", *arg) && argP1 != newArgs.end())
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{
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this->HandlePredicate(
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this->Makefile.CommandExists(argP1->c_str()),
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reducible, arg, newArgs, argP1, argP2);
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}
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// does a policy exist
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if (this->IsKeyword("POLICY", *arg) && argP1 != newArgs.end())
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{
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cmPolicies::PolicyID pid;
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this->HandlePredicate(
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this->Makefile.GetPolicies()->GetPolicyID(
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argP1->c_str(), pid),
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reducible, arg, newArgs, argP1, argP2);
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}
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// does a target exist
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if (this->IsKeyword("TARGET", *arg) && argP1 != newArgs.end())
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{
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this->HandlePredicate(
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this->Makefile.FindTargetToUse(argP1->GetValue())?true:false,
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reducible, arg, newArgs, argP1, argP2);
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}
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// is a variable defined
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if (this->IsKeyword("DEFINED", *arg) && argP1 != newArgs.end())
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{
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size_t argP1len = argP1->GetValue().size();
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bool bdef = false;
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if(argP1len > 4 && argP1->GetValue().substr(0, 4) == "ENV{" &&
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argP1->GetValue().operator[](argP1len-1) == '}')
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{
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std::string env = argP1->GetValue().substr(4, argP1len-5);
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bdef = cmSystemTools::GetEnv(env.c_str())?true:false;
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}
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else
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{
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bdef = this->Makefile.IsDefinitionSet(argP1->GetValue());
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}
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this->HandlePredicate(bdef, reducible, arg, newArgs, argP1, argP2);
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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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return true;
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}
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//=========================================================================
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// level two handles most binary operations except for AND OR
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bool cmConditionEvaluator::HandleLevel2(cmArgumentList &newArgs,
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std::string &errorString,
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cmake::MessageType &status)
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{
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int reducible;
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const char *def;
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const char *def2;
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do
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{
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reducible = 0;
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cmArgumentList::iterator arg = newArgs.begin();
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cmArgumentList::iterator argP1;
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cmArgumentList::iterator argP2;
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while (arg != newArgs.end())
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{
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argP1 = arg;
|
|
this->IncrementArguments(newArgs,argP1,argP2);
|
|
if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
|
|
IsKeyword("MATCHES", *argP1))
|
|
{
|
|
def = this->GetVariableOrString(*arg);
|
|
const char* rex = argP2->c_str();
|
|
this->Makefile.ClearMatches();
|
|
cmsys::RegularExpression regEntry;
|
|
if ( !regEntry.compile(rex) )
|
|
{
|
|
cmOStringStream error;
|
|
error << "Regular expression \"" << rex << "\" cannot compile";
|
|
errorString = error.str();
|
|
status = cmake::FATAL_ERROR;
|
|
return false;
|
|
}
|
|
if (regEntry.find(def))
|
|
{
|
|
this->Makefile.StoreMatches(regEntry);
|
|
*arg = cmExpandedCommandArgument("1", true);
|
|
}
|
|
else
|
|
{
|
|
*arg = cmExpandedCommandArgument("0", true);
|
|
}
|
|
newArgs.erase(argP2);
|
|
newArgs.erase(argP1);
|
|
argP1 = arg;
|
|
this->IncrementArguments(newArgs,argP1,argP2);
|
|
reducible = 1;
|
|
}
|
|
|
|
if (argP1 != newArgs.end() && this->IsKeyword("MATCHES", *arg))
|
|
{
|
|
*arg = cmExpandedCommandArgument("0", true);
|
|
newArgs.erase(argP1);
|
|
argP1 = arg;
|
|
this->IncrementArguments(newArgs,argP1,argP2);
|
|
reducible = 1;
|
|
}
|
|
|
|
if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
|
|
(this->IsKeyword("LESS", *argP1) ||
|
|
this->IsKeyword("GREATER", *argP1) ||
|
|
this->IsKeyword("EQUAL", *argP1)))
|
|
{
|
|
def = this->GetVariableOrString(*arg);
|
|
def2 = this->GetVariableOrString(*argP2);
|
|
double lhs;
|
|
double rhs;
|
|
bool result;
|
|
if(sscanf(def, "%lg", &lhs) != 1 ||
|
|
sscanf(def2, "%lg", &rhs) != 1)
|
|
{
|
|
result = false;
|
|
}
|
|
else if (*(argP1) == "LESS")
|
|
{
|
|
result = (lhs < rhs);
|
|
}
|
|
else if (*(argP1) == "GREATER")
|
|
{
|
|
result = (lhs > rhs);
|
|
}
|
|
else
|
|
{
|
|
result = (lhs == rhs);
|
|
}
|
|
this->HandleBinaryOp(result,
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
|
|
if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
|
|
(this->IsKeyword("STRLESS", *argP1) ||
|
|
this->IsKeyword("STREQUAL", *argP1) ||
|
|
this->IsKeyword("STRGREATER", *argP1)))
|
|
{
|
|
def = this->GetVariableOrString(*arg);
|
|
def2 = this->GetVariableOrString(*argP2);
|
|
int val = strcmp(def,def2);
|
|
bool result;
|
|
if (*(argP1) == "STRLESS")
|
|
{
|
|
result = (val < 0);
|
|
}
|
|
else if (*(argP1) == "STRGREATER")
|
|
{
|
|
result = (val > 0);
|
|
}
|
|
else // strequal
|
|
{
|
|
result = (val == 0);
|
|
}
|
|
this->HandleBinaryOp(result,
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
|
|
if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
|
|
(this->IsKeyword("VERSION_LESS", *argP1) ||
|
|
this->IsKeyword("VERSION_GREATER", *argP1) ||
|
|
this->IsKeyword("VERSION_EQUAL", *argP1)))
|
|
{
|
|
def = this->GetVariableOrString(*arg);
|
|
def2 = this->GetVariableOrString(*argP2);
|
|
cmSystemTools::CompareOp op = cmSystemTools::OP_EQUAL;
|
|
if(*argP1 == "VERSION_LESS")
|
|
{
|
|
op = cmSystemTools::OP_LESS;
|
|
}
|
|
else if(*argP1 == "VERSION_GREATER")
|
|
{
|
|
op = cmSystemTools::OP_GREATER;
|
|
}
|
|
bool result = cmSystemTools::VersionCompare(op, def, def2);
|
|
this->HandleBinaryOp(result,
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
|
|
// is file A newer than file B
|
|
if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
|
|
this->IsKeyword("IS_NEWER_THAN", *argP1))
|
|
{
|
|
int fileIsNewer=0;
|
|
bool success=cmSystemTools::FileTimeCompare(arg->GetValue(),
|
|
(argP2)->GetValue(),
|
|
&fileIsNewer);
|
|
this->HandleBinaryOp(
|
|
(success==false || fileIsNewer==1 || fileIsNewer==0),
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
|
|
++arg;
|
|
}
|
|
}
|
|
while (reducible);
|
|
return true;
|
|
}
|
|
|
|
//=========================================================================
|
|
// level 3 handles NOT
|
|
bool cmConditionEvaluator::HandleLevel3(cmArgumentList &newArgs,
|
|
std::string &errorString,
|
|
cmake::MessageType &status)
|
|
{
|
|
int reducible;
|
|
do
|
|
{
|
|
reducible = 0;
|
|
cmArgumentList::iterator arg = newArgs.begin();
|
|
cmArgumentList::iterator argP1;
|
|
cmArgumentList::iterator argP2;
|
|
while (arg != newArgs.end())
|
|
{
|
|
argP1 = arg;
|
|
IncrementArguments(newArgs,argP1,argP2);
|
|
if (argP1 != newArgs.end() && IsKeyword("NOT", *arg))
|
|
{
|
|
bool rhs = this->GetBooleanValueWithAutoDereference(*argP1,
|
|
errorString,
|
|
status);
|
|
this->HandlePredicate(!rhs, reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
++arg;
|
|
}
|
|
}
|
|
while (reducible);
|
|
return true;
|
|
}
|
|
|
|
//=========================================================================
|
|
// level 4 handles AND OR
|
|
bool cmConditionEvaluator::HandleLevel4(cmArgumentList &newArgs,
|
|
std::string &errorString,
|
|
cmake::MessageType &status)
|
|
{
|
|
int reducible;
|
|
bool lhs;
|
|
bool rhs;
|
|
do
|
|
{
|
|
reducible = 0;
|
|
cmArgumentList::iterator arg = newArgs.begin();
|
|
cmArgumentList::iterator argP1;
|
|
cmArgumentList::iterator argP2;
|
|
while (arg != newArgs.end())
|
|
{
|
|
argP1 = arg;
|
|
IncrementArguments(newArgs,argP1,argP2);
|
|
if (argP1 != newArgs.end() && IsKeyword("AND", *argP1) &&
|
|
argP2 != newArgs.end())
|
|
{
|
|
lhs = this->GetBooleanValueWithAutoDereference(*arg,
|
|
errorString,
|
|
status);
|
|
rhs = this->GetBooleanValueWithAutoDereference(*argP2,
|
|
errorString,
|
|
status);
|
|
this->HandleBinaryOp((lhs && rhs),
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
|
|
if (argP1 != newArgs.end() && this->IsKeyword("OR", *argP1) &&
|
|
argP2 != newArgs.end())
|
|
{
|
|
lhs = this->GetBooleanValueWithAutoDereference(*arg,
|
|
errorString,
|
|
status);
|
|
rhs = this->GetBooleanValueWithAutoDereference(*argP2,
|
|
errorString,
|
|
status);
|
|
this->HandleBinaryOp((lhs || rhs),
|
|
reducible, arg, newArgs, argP1, argP2);
|
|
}
|
|
++arg;
|
|
}
|
|
}
|
|
while (reducible);
|
|
return true;
|
|
}
|