ENH: add cache manager class, move all commands into cmCommands.cxx to speed up compile times, share a .lib with the command line and mfc versions.

Source/cmCacheManager.cxx

@@ -0,0 +1,117 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
+
+#include "cmCacheManager.h"
+#include "cmSystemTools.h"
+
+const char* cmCacheManagerTypes[] = 
+{ "BOOL",
+  "PATH",
+  "STRING",
+  0
+};
+
+cmCacheManager::CacheEntryType cmCacheManager::StringToType(const char* s)
+{
+  int i = 0;
+  while(cmCacheManagerTypes[i])
+    {
+    if(strcmp(s, cmCacheManagerTypes[i]) == 0)
+      {
+      return static_cast<CacheEntryType>(i);
+      }
+    }
+  return STRING;
+}
+
+    
+cmCacheManager* cmCacheManager::s_Instance = 0;
+
+cmCacheManager* cmCacheManager::GetInstance()
+{
+  if(!cmCacheManager::s_Instance)
+    {
+    cmCacheManager::s_Instance = new cmCacheManager;
+    }
+  return cmCacheManager::s_Instance;
+}
+
+
+
+bool cmCacheManager::LoadCache(const char* path)
+{
+  std::ifstream fin(path);
+  if(!fin)
+    {
+    cmSystemTools::Error("Unable to open cache file for load. ", path);
+    return false;
+    }
+  const int bsize = 4096;
+  char buffer[bsize];
+  std::string inputLine;
+  while(fin)
+    {
+    CacheEntry e;
+    std::string key;
+    fin.getline(buffer, bsize, '|');
+    key = buffer;
+    fin.getline(buffer, bsize, '|');
+    e.m_Value = buffer;
+    fin.getline(buffer, bsize); // last token is separated by a newline
+    e.m_Type = cmCacheManager::StringToType(buffer);
+    if(fin)
+      {
+      m_Cache[key] = e;
+      }
+    }
+}
+
+bool cmCacheManager::SaveCache(const char* path)
+{
+  std::ofstream fout(path);
+  if(!fout)
+    {
+    cmSystemTools::Error("Unable to open cache file for save. ", path);
+    return false;
+    }
+  for( std::map<std::string, CacheEntry>::iterator i = m_Cache.begin();
+       i != m_Cache.end(); ++i)
+    {
+    fout << (*i).first.c_str() << " | " << (*i).second.m_Value << " | ";
+    CacheEntryType t = (*i).second.m_Type;
+    fout << cmCacheManagerTypes[t];
+    }
+  fout << "\n";
+}
+
+void cmCacheManager::AddCacheEntry(const char* key, 
+				   const char* value, 
+				   CacheEntryType type)
+{
+  CacheEntry e;
+  e.m_Value = value;
+  e.m_Type = type;
+  m_Cache[key] = e;
+}
+
+const char* cmCacheManager::GetCacheValue(const char* key)
+{
+  if(m_Cache.count(key))
+    {
+    return m_Cache[key].m_Value.c_str();
+    }
+  return 0;
+}