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authorAnas Nashif <anas.nashif@intel.com>2012-10-30 22:39:57 (GMT)
committerAnas Nashif <anas.nashif@intel.com>2012-10-30 22:39:57 (GMT)
commit035c7fabc3b82cbc9a346c11abe2e9462b4c0379 (patch)
tree7e40f5a790eae329a8c5d3e59f046451767956ff /Source/cmIfCommand.cxx
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Imported Upstream version 2.8.9upstream/2.8.9
Diffstat (limited to 'Source/cmIfCommand.cxx')
-rw-r--r--Source/cmIfCommand.cxx947
1 files changed, 947 insertions, 0 deletions
diff --git a/Source/cmIfCommand.cxx b/Source/cmIfCommand.cxx
new file mode 100644
index 0000000..ffc0f35
--- /dev/null
+++ b/Source/cmIfCommand.cxx
@@ -0,0 +1,947 @@
+/*============================================================================
+ 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 "cmIfCommand.h"
+#include "cmStringCommand.h"
+
+#include <stdlib.h> // required for atof
+#include <list>
+#include <cmsys/RegularExpression.hxx>
+
+
+static std::string cmIfCommandError(
+ cmMakefile* mf, std::vector<std::string> const& args)
+{
+ cmLocalGenerator* lg = mf->GetLocalGenerator();
+ std::string err = "given arguments:\n ";
+ for(std::vector<std::string>::const_iterator i = args.begin();
+ i != args.end(); ++i)
+ {
+ err += " ";
+ err += lg->EscapeForCMake(i->c_str());
+ }
+ err += "\n";
+ return err;
+}
+
+//=========================================================================
+bool cmIfFunctionBlocker::
+IsFunctionBlocked(const cmListFileFunction& lff,
+ cmMakefile &mf,
+ cmExecutionStatus &inStatus)
+{
+ // we start by recording all the functions
+ if (!cmSystemTools::Strucmp(lff.Name.c_str(),"if"))
+ {
+ this->ScopeDepth++;
+ }
+ if (!cmSystemTools::Strucmp(lff.Name.c_str(),"endif"))
+ {
+ this->ScopeDepth--;
+ // if this is the endif for this if statement, then start executing
+ if (!this->ScopeDepth)
+ {
+ // Remove the function blocker for this scope or bail.
+ cmsys::auto_ptr<cmFunctionBlocker>
+ fb(mf.RemoveFunctionBlocker(this, lff));
+ if(!fb.get()) { return false; }
+
+ // execute the functions for the true parts of the if statement
+ cmExecutionStatus status;
+ int scopeDepth = 0;
+ for(unsigned int c = 0; c < this->Functions.size(); ++c)
+ {
+ // keep track of scope depth
+ if (!cmSystemTools::Strucmp(this->Functions[c].Name.c_str(),"if"))
+ {
+ scopeDepth++;
+ }
+ if (!cmSystemTools::Strucmp(this->Functions[c].Name.c_str(),"endif"))
+ {
+ scopeDepth--;
+ }
+ // watch for our state change
+ if (scopeDepth == 0 &&
+ !cmSystemTools::Strucmp(this->Functions[c].Name.c_str(),"else"))
+ {
+ this->IsBlocking = this->HasRun;
+ this->HasRun = true;
+
+ // if trace is enabled, print a (trivially) evaluated "else"
+ // statement
+ if(!this->IsBlocking && mf.GetCMakeInstance()->GetTrace())
+ {
+ mf.PrintCommandTrace(this->Functions[c]);
+ }
+ }
+ else if (scopeDepth == 0 && !cmSystemTools::Strucmp
+ (this->Functions[c].Name.c_str(),"elseif"))
+ {
+ if (this->HasRun)
+ {
+ this->IsBlocking = true;
+ }
+ else
+ {
+ // Place this call on the call stack.
+ cmMakefileCall stack_manager(&mf, this->Functions[c], status);
+ static_cast<void>(stack_manager);
+
+ // if trace is enabled, print the evaluated "elseif" statement
+ if(mf.GetCMakeInstance()->GetTrace())
+ {
+ mf.PrintCommandTrace(this->Functions[c]);
+ }
+
+ std::string errorString;
+
+ std::vector<std::string> expandedArguments;
+ mf.ExpandArguments(this->Functions[c].Arguments,
+ expandedArguments);
+
+ cmake::MessageType messType;
+ bool isTrue =
+ cmIfCommand::IsTrue(expandedArguments, errorString,
+ &mf, messType);
+
+ if (errorString.size())
+ {
+ std::string err = cmIfCommandError(&mf, expandedArguments);
+ err += errorString;
+ mf.IssueMessage(messType, err);
+ if (messType == cmake::FATAL_ERROR)
+ {
+ cmSystemTools::SetFatalErrorOccured();
+ return true;
+ }
+ }
+
+ if (isTrue)
+ {
+ this->IsBlocking = false;
+ this->HasRun = true;
+ }
+ }
+ }
+
+ // should we execute?
+ else if (!this->IsBlocking)
+ {
+ status.Clear();
+ mf.ExecuteCommand(this->Functions[c],status);
+ if (status.GetReturnInvoked())
+ {
+ inStatus.SetReturnInvoked(true);
+ return true;
+ }
+ if (status.GetBreakInvoked())
+ {
+ inStatus.SetBreakInvoked(true);
+ return true;
+ }
+ }
+ }
+ return true;
+ }
+ }
+
+ // record the command
+ this->Functions.push_back(lff);
+
+ // always return true
+ return true;
+}
+
+//=========================================================================
+bool cmIfFunctionBlocker::ShouldRemove(const cmListFileFunction& lff,
+ cmMakefile&)
+{
+ if (!cmSystemTools::Strucmp(lff.Name.c_str(),"endif"))
+ {
+ // if the endif has arguments, then make sure
+ // they match the arguments of the matching if
+ if (lff.Arguments.size() == 0 ||
+ lff.Arguments == this->Args)
+ {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+//=========================================================================
+bool cmIfCommand
+::InvokeInitialPass(const std::vector<cmListFileArgument>& args,
+ cmExecutionStatus &)
+{
+ std::string errorString;
+
+ std::vector<std::string> expandedArguments;
+ this->Makefile->ExpandArguments(args, expandedArguments);
+
+ cmake::MessageType status;
+ bool isTrue =
+ cmIfCommand::IsTrue(expandedArguments,errorString,
+ this->Makefile, status);
+
+ if (errorString.size())
+ {
+ std::string err = cmIfCommandError(this->Makefile, expandedArguments);
+ err += errorString;
+ if (status == cmake::FATAL_ERROR)
+ {
+ this->SetError(err.c_str());
+ cmSystemTools::SetFatalErrorOccured();
+ return false;
+ }
+ else
+ {
+ this->Makefile->IssueMessage(status, err);
+ }
+ }
+
+ cmIfFunctionBlocker *f = new cmIfFunctionBlocker();
+ // if is isn't true block the commands
+ f->ScopeDepth = 1;
+ f->IsBlocking = !isTrue;
+ if (isTrue)
+ {
+ f->HasRun = true;
+ }
+ f->Args = args;
+ this->Makefile->AddFunctionBlocker(f);
+
+ return true;
+}
+
+namespace
+{
+ //=========================================================================
+ bool GetBooleanValue(std::string& arg, cmMakefile* mf)
+ {
+ // Check basic constants.
+ if (arg == "0")
+ {
+ return false;
+ }
+ if (arg == "1")
+ {
+ return true;
+ }
+
+ // Check named constants.
+ if (cmSystemTools::IsOn(arg.c_str()))
+ {
+ return true;
+ }
+ if (cmSystemTools::IsOff(arg.c_str()))
+ {
+ return false;
+ }
+
+ // Check for numbers.
+ if(!arg.empty())
+ {
+ char* end;
+ double d = strtod(arg.c_str(), &end);
+ if(*end == '\0')
+ {
+ // The whole string is a number. Use C conversion to bool.
+ return d? true:false;
+ }
+ }
+
+ // Check definition.
+ const char* def = mf->GetDefinition(arg.c_str());
+ return !cmSystemTools::IsOff(def);
+ }
+
+ //=========================================================================
+ // Boolean value behavior from CMake 2.6.4 and below.
+ bool GetBooleanValueOld(std::string const& arg, cmMakefile* mf, bool one)
+ {
+ if(one)
+ {
+ // Old IsTrue behavior for single argument.
+ if(arg == "0")
+ { return false; }
+ else if(arg == "1")
+ { return true; }
+ else
+ { return !cmSystemTools::IsOff(mf->GetDefinition(arg.c_str())); }
+ }
+ else
+ {
+ // Old GetVariableOrNumber behavior.
+ const char* def = mf->GetDefinition(arg.c_str());
+ if(!def && atoi(arg.c_str()))
+ {
+ def = arg.c_str();
+ }
+ return !cmSystemTools::IsOff(def);
+ }
+ }
+
+ //=========================================================================
+ // returns the resulting boolean value
+ bool GetBooleanValueWithAutoDereference(
+ std::string &newArg,
+ cmMakefile *makefile,
+ std::string &errorString,
+ cmPolicies::PolicyStatus Policy12Status,
+ cmake::MessageType &status,
+ bool oneArg = false)
+ {
+ // Use the policy if it is set.
+ if (Policy12Status == cmPolicies::NEW)
+ {
+ return GetBooleanValue(newArg, makefile);
+ }
+ else if (Policy12Status == cmPolicies::OLD)
+ {
+ return GetBooleanValueOld(newArg, makefile, oneArg);
+ }
+
+ // Check policy only if old and new results differ.
+ bool newResult = GetBooleanValue(newArg, makefile);
+ bool oldResult = GetBooleanValueOld(newArg, makefile, oneArg);
+ if(newResult != oldResult)
+ {
+ switch(Policy12Status)
+ {
+ case cmPolicies::WARN:
+ {
+ cmPolicies* policies = makefile->GetPolicies();
+ errorString = "An argument named \"" + newArg
+ + "\" appears in a conditional statement. "
+ + policies->GetPolicyWarning(cmPolicies::CMP0012);
+ status = cmake::AUTHOR_WARNING;
+ }
+ case cmPolicies::OLD:
+ return oldResult;
+ case cmPolicies::REQUIRED_IF_USED:
+ case cmPolicies::REQUIRED_ALWAYS:
+ {
+ cmPolicies* policies = makefile->GetPolicies();
+ errorString = "An argument named \"" + newArg
+ + "\" appears in a conditional statement. "
+ + policies->GetRequiredPolicyError(cmPolicies::CMP0012);
+ status = cmake::FATAL_ERROR;
+ }
+ case cmPolicies::NEW:
+ break;
+ }
+ }
+ return newResult;
+ }
+
+ //=========================================================================
+ void IncrementArguments(std::list<std::string> &newArgs,
+ std::list<std::string>::iterator &argP1,
+ std::list<std::string>::iterator &argP2)
+ {
+ if (argP1 != newArgs.end())
+ {
+ argP1++;
+ argP2 = argP1;
+ if (argP1 != newArgs.end())
+ {
+ argP2++;
+ }
+ }
+ }
+
+ //=========================================================================
+ // helper function to reduce code duplication
+ void HandlePredicate(bool value, int &reducible,
+ std::list<std::string>::iterator &arg,
+ std::list<std::string> &newArgs,
+ std::list<std::string>::iterator &argP1,
+ std::list<std::string>::iterator &argP2)
+ {
+ if(value)
+ {
+ *arg = "1";
+ }
+ else
+ {
+ *arg = "0";
+ }
+ newArgs.erase(argP1);
+ argP1 = arg;
+ IncrementArguments(newArgs,argP1,argP2);
+ reducible = 1;
+ }
+
+ //=========================================================================
+ // helper function to reduce code duplication
+ void HandleBinaryOp(bool value, int &reducible,
+ std::list<std::string>::iterator &arg,
+ std::list<std::string> &newArgs,
+ std::list<std::string>::iterator &argP1,
+ std::list<std::string>::iterator &argP2)
+ {
+ if(value)
+ {
+ *arg = "1";
+ }
+ else
+ {
+ *arg = "0";
+ }
+ newArgs.erase(argP2);
+ newArgs.erase(argP1);
+ argP1 = arg;
+ IncrementArguments(newArgs,argP1,argP2);
+ reducible = 1;
+ }
+
+ //=========================================================================
+ enum Op { OpLess, OpEqual, OpGreater };
+ bool HandleVersionCompare(Op op, const char* lhs_str, const char* rhs_str)
+ {
+ // Parse out up to 4 components.
+ unsigned int lhs[4] = {0,0,0,0};
+ unsigned int rhs[4] = {0,0,0,0};
+ sscanf(lhs_str, "%u.%u.%u.%u", &lhs[0], &lhs[1], &lhs[2], &lhs[3]);
+ sscanf(rhs_str, "%u.%u.%u.%u", &rhs[0], &rhs[1], &rhs[2], &rhs[3]);
+
+ // Do component-wise comparison.
+ for(unsigned int i=0; i < 4; ++i)
+ {
+ if(lhs[i] < rhs[i])
+ {
+ // lhs < rhs, so true if operation is LESS
+ return op == OpLess;
+ }
+ else if(lhs[i] > rhs[i])
+ {
+ // lhs > rhs, so true if operation is GREATER
+ return op == OpGreater;
+ }
+ }
+ // lhs == rhs, so true if operation is EQUAL
+ return op == OpEqual;
+ }
+
+ //=========================================================================
+ // level 0 processes parenthetical expressions
+ bool HandleLevel0(std::list<std::string> &newArgs,
+ cmMakefile *makefile,
+ std::string &errorString,
+ cmake::MessageType &status)
+ {
+ int reducible;
+ do
+ {
+ reducible = 0;
+ std::list<std::string>::iterator arg = newArgs.begin();
+ while (arg != newArgs.end())
+ {
+ if (*arg == "(")
+ {
+ // search for the closing paren for this opening one
+ std::list<std::string>::iterator argClose;
+ argClose = arg;
+ argClose++;
+ unsigned int depth = 1;
+ while (argClose != newArgs.end() && depth)
+ {
+ if (*argClose == "(")
+ {
+ depth++;
+ }
+ if (*argClose == ")")
+ {
+ depth--;
+ }
+ argClose++;
+ }
+ if (depth)
+ {
+ errorString = "mismatched parenthesis in condition";
+ status = cmake::FATAL_ERROR;
+ return false;
+ }
+ // store the reduced args in this vector
+ std::vector<std::string> newArgs2;
+
+ // copy to the list structure
+ std::list<std::string>::iterator argP1 = arg;
+ argP1++;
+ for(; argP1 != argClose; argP1++)
+ {
+ newArgs2.push_back(*argP1);
+ }
+ newArgs2.pop_back();
+ // now recursively invoke IsTrue to handle the values inside the
+ // parenthetical expression
+ bool value =
+ cmIfCommand::IsTrue(newArgs2, errorString, makefile, status);
+ if(value)
+ {
+ *arg = "1";
+ }
+ else
+ {
+ *arg = "0";
+ }
+ argP1 = arg;
+ argP1++;
+ // remove the now evaluated parenthetical expression
+ newArgs.erase(argP1,argClose);
+ }
+ ++arg;
+ }
+ }
+ while (reducible);
+ return true;
+ }
+
+ //=========================================================================
+ // level one handles most predicates except for NOT
+ bool HandleLevel1(std::list<std::string> &newArgs,
+ cmMakefile *makefile,
+ std::string &, cmake::MessageType &)
+ {
+ int reducible;
+ do
+ {
+ reducible = 0;
+ std::list<std::string>::iterator arg = newArgs.begin();
+ std::list<std::string>::iterator argP1;
+ std::list<std::string>::iterator argP2;
+ while (arg != newArgs.end())
+ {
+ argP1 = arg;
+ IncrementArguments(newArgs,argP1,argP2);
+ // does a file exist
+ if (*arg == "EXISTS" && argP1 != newArgs.end())
+ {
+ HandlePredicate(
+ cmSystemTools::FileExists((argP1)->c_str()),
+ reducible, arg, newArgs, argP1, argP2);
+ }
+ // does a directory with this name exist
+ if (*arg == "IS_DIRECTORY" && argP1 != newArgs.end())
+ {
+ HandlePredicate(
+ cmSystemTools::FileIsDirectory((argP1)->c_str()),
+ reducible, arg, newArgs, argP1, argP2);
+ }
+ // does a symlink with this name exist
+ if (*arg == "IS_SYMLINK" && argP1 != newArgs.end())
+ {
+ HandlePredicate(
+ cmSystemTools::FileIsSymlink((argP1)->c_str()),
+ reducible, arg, newArgs, argP1, argP2);
+ }
+ // is the given path an absolute path ?
+ if (*arg == "IS_ABSOLUTE" && argP1 != newArgs.end())
+ {
+ HandlePredicate(
+ cmSystemTools::FileIsFullPath((argP1)->c_str()),
+ reducible, arg, newArgs, argP1, argP2);
+ }
+ // does a command exist
+ if (*arg == "COMMAND" && argP1 != newArgs.end())
+ {
+ HandlePredicate(
+ makefile->CommandExists((argP1)->c_str()),
+ reducible, arg, newArgs, argP1, argP2);
+ }
+ // does a policy exist
+ if (*arg == "POLICY" && argP1 != newArgs.end())
+ {
+ cmPolicies::PolicyID pid;
+ HandlePredicate(
+ makefile->GetPolicies()->GetPolicyID((argP1)->c_str(), pid),
+ reducible, arg, newArgs, argP1, argP2);
+ }
+ // does a target exist
+ if (*arg == "TARGET" && argP1 != newArgs.end())
+ {
+ HandlePredicate(
+ makefile->FindTargetToUse((argP1)->c_str())? true:false,
+ reducible, arg, newArgs, argP1, argP2);
+ }
+ // is a variable defined
+ if (*arg == "DEFINED" && argP1 != newArgs.end())
+ {
+ size_t argP1len = argP1->size();
+ bool bdef = false;
+ if(argP1len > 4 && argP1->substr(0, 4) == "ENV{" &&
+ argP1->operator[](argP1len-1) == '}')
+ {
+ std::string env = argP1->substr(4, argP1len-5);
+ bdef = cmSystemTools::GetEnv(env.c_str())?true:false;
+ }
+ else
+ {
+ bdef = makefile->IsDefinitionSet((argP1)->c_str());
+ }
+ HandlePredicate(bdef, reducible, arg, newArgs, argP1, argP2);
+ }
+ ++arg;
+ }
+ }
+ while (reducible);
+ return true;
+ }
+
+ //=========================================================================
+ // level two handles most binary operations except for AND OR
+ bool HandleLevel2(std::list<std::string> &newArgs,
+ cmMakefile *makefile,
+ std::string &errorString,
+ cmake::MessageType &status)
+ {
+ int reducible;
+ const char *def;
+ const char *def2;
+ do
+ {
+ reducible = 0;
+ std::list<std::string>::iterator arg = newArgs.begin();
+ std::list<std::string>::iterator argP1;
+ std::list<std::string>::iterator argP2;
+ while (arg != newArgs.end())
+ {
+ argP1 = arg;
+ IncrementArguments(newArgs,argP1,argP2);
+ if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
+ *(argP1) == "MATCHES")
+ {
+ def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
+ const char* rex = (argP2)->c_str();
+ cmStringCommand::ClearMatches(makefile);
+ 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))
+ {
+ cmStringCommand::StoreMatches(makefile, regEntry);
+ *arg = "1";
+ }
+ else
+ {
+ *arg = "0";
+ }
+ newArgs.erase(argP2);
+ newArgs.erase(argP1);
+ argP1 = arg;
+ IncrementArguments(newArgs,argP1,argP2);
+ reducible = 1;
+ }
+
+ if (argP1 != newArgs.end() && *arg == "MATCHES")
+ {
+ *arg = "0";
+ newArgs.erase(argP1);
+ argP1 = arg;
+ IncrementArguments(newArgs,argP1,argP2);
+ reducible = 1;
+ }
+
+ if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
+ (*(argP1) == "LESS" || *(argP1) == "GREATER" ||
+ *(argP1) == "EQUAL"))
+ {
+ def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
+ def2 = cmIfCommand::GetVariableOrString((argP2)->c_str(), makefile);
+ 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);
+ }
+ HandleBinaryOp(result,
+ reducible, arg, newArgs, argP1, argP2);
+ }
+
+ if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
+ (*(argP1) == "STRLESS" ||
+ *(argP1) == "STREQUAL" ||
+ *(argP1) == "STRGREATER"))
+ {
+ def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
+ def2 = cmIfCommand::GetVariableOrString((argP2)->c_str(), makefile);
+ 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);
+ }
+ HandleBinaryOp(result,
+ reducible, arg, newArgs, argP1, argP2);
+ }
+
+ if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
+ (*(argP1) == "VERSION_LESS" || *(argP1) == "VERSION_GREATER" ||
+ *(argP1) == "VERSION_EQUAL"))
+ {
+ def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
+ def2 = cmIfCommand::GetVariableOrString((argP2)->c_str(), makefile);
+ Op op = OpEqual;
+ if(*argP1 == "VERSION_LESS")
+ {
+ op = OpLess;
+ }
+ else if(*argP1 == "VERSION_GREATER")
+ {
+ op = OpGreater;
+ }
+ bool result = HandleVersionCompare(op, def, def2);
+ HandleBinaryOp(result,
+ reducible, arg, newArgs, argP1, argP2);
+ }
+
+ // is file A newer than file B
+ if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
+ *(argP1) == "IS_NEWER_THAN")
+ {
+ int fileIsNewer=0;
+ bool success=cmSystemTools::FileTimeCompare(arg->c_str(),
+ (argP2)->c_str(),
+ &fileIsNewer);
+ HandleBinaryOp(
+ (success==false || fileIsNewer==1 || fileIsNewer==0),
+ reducible, arg, newArgs, argP1, argP2);
+ }
+
+ ++arg;
+ }
+ }
+ while (reducible);
+ return true;
+ }
+
+ //=========================================================================
+ // level 3 handles NOT
+ bool HandleLevel3(std::list<std::string> &newArgs,
+ cmMakefile *makefile,
+ std::string &errorString,
+ cmPolicies::PolicyStatus Policy12Status,
+ cmake::MessageType &status)
+ {
+ int reducible;
+ do
+ {
+ reducible = 0;
+ std::list<std::string>::iterator arg = newArgs.begin();
+ std::list<std::string>::iterator argP1;
+ std::list<std::string>::iterator argP2;
+ while (arg != newArgs.end())
+ {
+ argP1 = arg;
+ IncrementArguments(newArgs,argP1,argP2);
+ if (argP1 != newArgs.end() && *arg == "NOT")
+ {
+ bool rhs = GetBooleanValueWithAutoDereference(*argP1, makefile,
+ errorString,
+ Policy12Status,
+ status);
+ HandlePredicate(!rhs, reducible, arg, newArgs, argP1, argP2);
+ }
+ ++arg;
+ }
+ }
+ while (reducible);
+ return true;
+ }
+
+ //=========================================================================
+ // level 4 handles AND OR
+ bool HandleLevel4(std::list<std::string> &newArgs,
+ cmMakefile *makefile,
+ std::string &errorString,
+ cmPolicies::PolicyStatus Policy12Status,
+ cmake::MessageType &status)
+ {
+ int reducible;
+ bool lhs;
+ bool rhs;
+ do
+ {
+ reducible = 0;
+ std::list<std::string>::iterator arg = newArgs.begin();
+ std::list<std::string>::iterator argP1;
+ std::list<std::string>::iterator argP2;
+ while (arg != newArgs.end())
+ {
+ argP1 = arg;
+ IncrementArguments(newArgs,argP1,argP2);
+ if (argP1 != newArgs.end() && *(argP1) == "AND" &&
+ argP2 != newArgs.end())
+ {
+ lhs = GetBooleanValueWithAutoDereference(*arg, makefile,
+ errorString,
+ Policy12Status,
+ status);
+ rhs = GetBooleanValueWithAutoDereference(*argP2, makefile,
+ errorString,
+ Policy12Status,
+ status);
+ HandleBinaryOp((lhs && rhs),
+ reducible, arg, newArgs, argP1, argP2);
+ }
+
+ if (argP1 != newArgs.end() && *(argP1) == "OR" &&
+ argP2 != newArgs.end())
+ {
+ lhs = GetBooleanValueWithAutoDereference(*arg, makefile,
+ errorString,
+ Policy12Status,
+ status);
+ rhs = GetBooleanValueWithAutoDereference(*argP2, makefile,
+ errorString,
+ Policy12Status,
+ status);
+ HandleBinaryOp((lhs || rhs),
+ reducible, arg, newArgs, argP1, argP2);
+ }
+ ++arg;
+ }
+ }
+ while (reducible);
+ return true;
+ }
+}
+
+
+//=========================================================================
+// order of operations,
+// 1. ( ) -- parenthetical groups
+// 2. IS_DIRECTORY EXISTS COMMAND DEFINED etc predicates
+// 3. MATCHES LESS GREATER EQUAL STRLESS STRGREATER STREQUAL etc binary ops
+// 4. NOT
+// 5. AND OR
+//
+// There is an issue on whether the arguments should be values of references,
+// for example IF (FOO AND BAR) should that compare the strings FOO and BAR
+// or should it really do IF (${FOO} AND ${BAR}) Currently IS_DIRECTORY
+// EXISTS COMMAND and DEFINED all take values. EQUAL, LESS and GREATER can
+// take numeric values or variable names. STRLESS and STRGREATER take
+// variable names but if the variable name is not found it will use the name
+// directly. AND OR take variables or the values 0 or 1.
+
+
+bool cmIfCommand::IsTrue(const std::vector<std::string> &args,
+ std::string &errorString, cmMakefile *makefile,
+ cmake::MessageType &status)
+{
+ errorString = "";
+
+ // handle empty invocation
+ if (args.size() < 1)
+ {
+ return false;
+ }
+
+ // store the reduced args in this vector
+ std::list<std::string> newArgs;
+
+ // copy to the list structure
+ for(unsigned int i = 0; i < args.size(); ++i)
+ {
+ newArgs.push_back(args[i]);
+ }
+
+ // now loop through the arguments and see if we can reduce any of them
+ // we do this multiple times. Once for each level of precedence
+ // parens
+ if (!HandleLevel0(newArgs, makefile, errorString, status))
+ {
+ return false;
+ }
+ //predicates
+ if (!HandleLevel1(newArgs, makefile, errorString, status))
+ {
+ return false;
+ }
+ // binary ops
+ if (!HandleLevel2(newArgs, makefile, errorString, status))
+ {
+ return false;
+ }
+
+ // used to store the value of policy CMP0012 for performance
+ cmPolicies::PolicyStatus Policy12Status =
+ makefile->GetPolicyStatus(cmPolicies::CMP0012);
+
+ // NOT
+ if (!HandleLevel3(newArgs, makefile, errorString,
+ Policy12Status, status))
+ {
+ return false;
+ }
+ // AND OR
+ if (!HandleLevel4(newArgs, makefile, errorString,
+ Policy12Status, status))
+ {
+ return false;
+ }
+
+ // now at the end there should only be one argument left
+ if (newArgs.size() != 1)
+ {
+ errorString = "Unknown arguments specified";
+ status = cmake::FATAL_ERROR;
+ return false;
+ }
+
+ return GetBooleanValueWithAutoDereference(*(newArgs.begin()),
+ makefile,
+ errorString,
+ Policy12Status,
+ status, true);
+}
+
+//=========================================================================
+const char* cmIfCommand::GetVariableOrString(const char* str,
+ const cmMakefile* mf)
+{
+ const char* def = mf->GetDefinition(str);
+ if(!def)
+ {
+ def = str;
+ }
+ return def;
+}