Introduce cmState class.

At this point, it is an interface to the cache.  It will be extended
to be a universal interface for access to and manipulation of
configuration-time data (defintions, properties on targets,
directories, source files etc).

This will allow porting all command implementations away
from the cmMakefile and cmTarget classes, and result in something
more-purely related to configuration-time processing of cmake
commands.  That should serve at least the following goals:

 * Split the CMake implementation more definitively into three
   stages: Configuration, computation and generation, and be able to
   implement each optimally for memory access patterns etc.
 * Make better IDE integration possible by making more configuration
   data available.
 * Make it possiblte to use a smaller library than CMakeLib.a in
   cpack and ctest, resulting in smaller executables.
 * Make it possible to run the configure step multiple times in
   the same CMake run (#14539).

Manage its lifetime in the cmake class, and add a convenience accessor
to cmMakefile.

1 files changed, 62 insertions, 0 deletions

diff --git a/Source/cmState.h b/Source/cmState.h
new file mode 100644
index 0000000..06b0ec6
--- /dev/null
+++ b/Source/cmState.h
@@ -0,0 +1,62 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2015 Stephen Kelly <steveire@gmail.com>
+
+  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.
+============================================================================*/
+#ifndef cmState_h
+#define cmState_h
+
+#include "cmCacheManager.h"
+
+class cmake;
+
+class cmState
+{
+public:
+  cmState(cmake* cm);
+
+  static cmCacheManager::CacheEntryType StringToCacheEntryType(const char*);
+  static const char* CacheEntryTypeToString(cmCacheManager::CacheEntryType);
+  static bool IsCacheEntryType(std::string const& key);
+
+  std::vector<std::string> GetCacheEntryKeys() const;
+  const char* GetCacheEntryValue(std::string const& key) const;
+  const char* GetInitializedCacheValue(std::string const& key) const;
+  cmCacheManager::CacheEntryType
+  GetCacheEntryType(std::string const& key) const;
+  void SetCacheEntryValue(std::string const& key, std::string const& value);
+  void SetCacheValue(std::string const& key, std::string const& value);
+
+  void AddCacheEntry(const std::string& key, const char* value,
+                     const char* helpString,
+                     cmCacheManager::CacheEntryType type);
+  void RemoveCacheEntry(std::string const& key);
+
+  void SetCacheEntryProperty(std::string const& key,
+                             std::string const& propertyName,
+                             std::string const& value);
+  void SetCacheEntryBoolProperty(std::string const& key,
+                                 std::string const& propertyName,
+                                 bool value);
+  const char* GetCacheEntryProperty(std::string const& key,
+                                    std::string const& propertyName);
+  bool GetCacheEntryPropertyAsBool(std::string const& key,
+                                   std::string const& propertyName);
+  void AppendCacheEntryProperty(std::string const& key,
+                                const std::string& property,
+                                const std::string& value,
+                                bool asString = false);
+  void RemoveCacheEntryProperty(std::string const& key,
+                                std::string const& propertyName);
+
+private:
+  cmake* CMakeInstance;
+};
+
+#endif