ENH: add framework for unified handling of arguments to cmake commands,

example see cmExportCommand.cxx

Alex

1 files changed, 308 insertions, 0 deletions

diff --git a/Source/cmCommandArgumentsHelper.cxx b/Source/cmCommandArgumentsHelper.cxx
new file mode 100644
index 0000000..ffcd15a
--- /dev/null
+++ b/Source/cmCommandArgumentsHelper.cxx
@@ -0,0 +1,308 @@
+/*=========================================================================
+
+  Program:   CMake - Cross-Platform Makefile Generator
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
+  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even 
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+     PURPOSE.  See the above copyright notices for more information.
+
+=========================================================================*/
+
+#include "cmCommandArgumentsHelper.h"
+
+cmCommandArgument::cmCommandArgument(cmCommandArgumentsHelper* args, 
+                                     const char* key, 
+                                     cmCommandArgumentGroup* group)
+:Key(key)
+,Group(group)
+,WasActive(false)
+,CurrentIndex(0) 
+{
+  if (args!=0)
+    {
+    args->AddArgument(this);
+    }
+    
+  if (this->Group!=0)
+    {
+    this->Group->ContainedArguments.push_back(this);
+    }
+}
+
+void cmCommandArgument::Reset()
+{
+  this->WasActive =false;
+  this->CurrentIndex = 0;
+  this->DoReset();
+}
+
+void cmCommandArgument::Follows(const cmCommandArgument* arg)
+{
+  this->ArgumentsBefore.insert(arg);
+}
+
+void cmCommandArgument::FollowsGroup(const cmCommandArgumentGroup* group)
+{
+  if (group!=0)
+    {
+    for(std::vector<cmCommandArgument*>::const_iterator 
+        argIt= group->ContainedArguments.begin();
+        argIt != group->ContainedArguments.end();
+        ++argIt)
+      {
+      this->ArgumentsBefore.insert(*argIt);
+      }
+    }
+}
+
+bool cmCommandArgument::MayFollow(const cmCommandArgument* current) const
+{
+  if (this->ArgumentsBefore.empty())
+    {
+    return true;
+    }
+
+  std::set<const cmCommandArgument*>::const_iterator argIt 
+                                         = this->ArgumentsBefore.find(current);
+  if (argIt != this->ArgumentsBefore.end())
+    {
+    return true;
+    }
+
+  return false;
+}
+
+bool cmCommandArgument::KeyMatches(const std::string& key) const
+{
+  if ((this->Key==0) || (this->Key[0]=='\0'))
+    {
+    return true;
+    }
+  return (key==this->Key);
+}
+
+void cmCommandArgument::ApplyOwnGroup()
+{
+  if (this->Group!=0)
+    {
+    for (std::vector<cmCommandArgument*>::const_iterator 
+         it = this->Group->ContainedArguments.begin();
+         it != this->Group->ContainedArguments.end();
+         ++it)
+      {
+      if(*it != this)
+        {
+        this->ArgumentsBefore.insert(*it);
+        }
+      }
+    }
+}
+
+void cmCommandArgument::Activate()
+{
+  this->WasActive = true; 
+  this->CurrentIndex = 0;
+}
+
+bool cmCommandArgument::Consume(const std::string& arg)
+{
+  bool res=this->DoConsume(arg, this->CurrentIndex);
+  this->CurrentIndex++;
+  return res;
+}
+
+
+cmCAStringVector::cmCAStringVector(cmCommandArgumentsHelper* args, 
+                                   const char* key, 
+                                   cmCommandArgumentGroup* group)
+:cmCommandArgument(args, key, group)
+{
+  if ((key==0) || (*key==0))
+    {
+    this->DataStart = 0;
+    }
+  else
+    {
+    this->DataStart = 1;
+    }
+}
+
+bool cmCAStringVector::DoConsume(const std::string& arg,unsigned int index)
+{
+  if (index >= this->DataStart)
+    {
+    if ((this->Ignore==0) || (arg != this->Ignore))
+      {
+      this->Vector.push_back(arg);
+      }
+    }
+
+  return false;
+}
+
+void cmCAStringVector::DoReset()
+{
+  this->Vector.clear();
+}
+
+cmCAString::cmCAString(cmCommandArgumentsHelper* args, 
+                       const char* key, 
+                       cmCommandArgumentGroup* group)
+:cmCommandArgument(args, key, group)
+{
+  if ((key==0) || (*key==0))
+    {
+    this->DataStart = 0;
+    }
+  else
+    {
+    this->DataStart = 1;
+    }
+}
+
+bool cmCAString::DoConsume(const std::string& arg, unsigned int index)
+{
+  if (index == this->DataStart)
+    {
+    this->String = arg;
+    }
+
+  return index >= this->DataStart;
+}
+
+void cmCAString::DoReset()
+{
+  this->String = "";
+}
+
+cmCAEnabler::cmCAEnabler(cmCommandArgumentsHelper* args, 
+                         const char* key, 
+                         cmCommandArgumentGroup* group)
+:cmCommandArgument(args, key, group)
+,Enabled(false) 
+{}
+
+bool cmCAEnabler::DoConsume(const std::string& arg, unsigned int index)
+{
+  if (index==0)
+    {
+    this->Enabled = true;
+    }
+  return true;
+}
+
+void cmCAEnabler::DoReset()
+{
+  this->Enabled = false;
+}
+
+cmCADisabler::cmCADisabler(cmCommandArgumentsHelper* args, 
+                           const char* key, 
+                           cmCommandArgumentGroup* group)
+:cmCommandArgument(args, key, group)
+,Enabled(true) 
+{}
+
+bool cmCADisabler::DoConsume(const std::string& arg, unsigned int index)
+{
+  if (index==0)
+    {
+    this->Enabled = false;
+    }
+  return true;
+}
+
+void cmCADisabler::DoReset()
+{
+  this->Enabled = true;
+}
+
+void cmCommandArgumentGroup::Follows(const cmCommandArgument* arg)
+{
+  for(std::vector<cmCommandArgument*>::iterator 
+      it = this->ContainedArguments.begin();
+      it != this->ContainedArguments.end();
+      ++it)
+    {
+    (*it)->Follows(arg);
+    }
+}
+
+void cmCommandArgumentGroup::FollowsGroup(const cmCommandArgumentGroup* group)
+{
+  for(std::vector<cmCommandArgument*>::iterator 
+      it = this->ContainedArguments.begin();
+      it != this->ContainedArguments.end();
+      ++it)
+    {
+    (*it)->FollowsGroup(group);
+    }
+}
+
+void cmCommandArgumentsHelper::Parse(const std::vector<std::string>* args, 
+                                     std::vector<std::string>* unconsumedArgs)
+{
+  if(args==0)
+    {
+    return;
+    }
+
+  for(std::vector<cmCommandArgument*>::iterator 
+      argIt = this->Arguments.begin();
+      argIt != this->Arguments.end();
+      ++argIt)
+    {
+    (*argIt)->ApplyOwnGroup();
+    (*argIt)->Reset();
+    }
+
+  cmCommandArgument* activeArgument = 0;
+  const cmCommandArgument* previousArgument = 0;
+  for(std::vector<std::string>::const_iterator it = args->begin();
+      it != args->end();
+      ++it)
+    {
+    for(std::vector<cmCommandArgument*>::iterator 
+        argIt = this->Arguments.begin();
+        argIt != this->Arguments.end();
+        ++argIt)
+      {
+      if ((*argIt)->KeyMatches(*it) && ((*argIt)->MayFollow(previousArgument)))
+        {
+        activeArgument = *argIt;
+        activeArgument->Activate();
+        break;
+        }
+      }
+
+    if (activeArgument)
+      {
+      bool argDone = activeArgument->Consume(*it);
+      previousArgument = activeArgument;
+      if (argDone)
+        {
+        activeArgument = 0;
+        }
+      }
+    else
+      {
+      if (unconsumedArgs!=0)
+        {
+        unconsumedArgs->push_back(*it);
+        }
+      }
+    }
+}
+
+void cmCommandArgumentsHelper::AddArgument(cmCommandArgument* arg)
+{
+  this->Arguments.push_back(arg);
+}
+