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/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/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 notice for more information.
=========================================================================*/
#include "gdcmGlobal.h"
#include "gdcmDicts.h"
#include "gdcmDefs.h"
#include "gdcmFilename.h"
#include <limits.h> // PATH_MAX
#include <string.h> // strcpy
#ifdef _WIN32
#include <windows.h> // MAX_PATH
#endif
namespace gdcm
{
// Must NOT be initialized. Default initialization to zero is
// necessary.
unsigned int GlobalCount;
class GlobalInternal
{
public:
GlobalInternal():GlobalDicts(),GlobalDefs() {}
Dicts GlobalDicts; // Part 6 + Part 4 elements
// TODO need H table for TransferSyntax / MediaStorage / Part 3 ...
Defs GlobalDefs;
// Ressource paths:
// By default only construct two paths:
// - The official install dir (need to keep in sinc with cmakelist variable
// - a dynamic one, so that gdcm is somewhat rellocatable
// - on some system where it make sense the path where the Resource should be located
void LoadDefaultPaths()
{
assert( RessourcePaths.empty() );
const char filename2[] = GDCM_CMAKE_INSTALL_PREFIX "/" GDCM_INSTALL_DATA_DIR "/XML/";
RessourcePaths.push_back( filename2 );
const char *curprocfn = System::GetCurrentProcessFileName();
if( curprocfn )
{
Filename fn( curprocfn );
std::string str = fn.GetPath();
str += "/../" GDCM_INSTALL_DATA_DIR;
RessourcePaths.push_back( str );
}
const char *respath = System::GetCurrentResourcesDirectory();
if( respath )
{
RessourcePaths.push_back( respath );
}
#ifdef GDCM_BUILD_TESTING
// Needed for backward compat and dashboard
const char src_path[] = GDCM_SOURCE_DIR "/Source/InformationObjectDefinition/";
RessourcePaths.push_back( src_path );
#endif
}
std::vector<std::string> RessourcePaths;
};
Global::Global()
{
if(++GlobalCount == 1)
{
assert( Internals == NULL ); // paranoid
Internals = new GlobalInternal;
assert( Internals->GlobalDicts.IsEmpty() );
// Fill in with default values now !
// at startup time is safer as later call might be from different thread
// thus initialization of std::map would be all skrew up
Internals->GlobalDicts.LoadDefaults();
assert( Internals->GlobalDefs.IsEmpty() );
// Same goes for GlobalDefs:
//Internals->GlobalDefs.LoadDefaults();
Internals->LoadDefaultPaths();
}
}
Global::~Global()
{
if(--GlobalCount == 0)
{
//Internals->GlobalDicts.Unload();
delete Internals;
Internals = NULL; // paranoid
}
}
bool Global::LoadResourcesFiles()
{
assert( Internals != NULL ); // paranoid
const char *filename = Locate( "Part3.xml" );
if( filename )
{
if( Internals->GlobalDefs.IsEmpty() )
Internals->GlobalDefs.LoadFromFile(filename);
return true;
}
// resource manager was not set properly
return false;
}
bool Global::Append(const char *path)
{
if( !System::FileIsDirectory(path) )
{
return false;
}
Internals->RessourcePaths.push_back( path );
return true;
}
bool Global::Prepend(const char *path)
{
if( !System::FileIsDirectory(path) )
{
return false;
}
Internals->RessourcePaths.insert( Internals->RessourcePaths.begin(), path );
return true;
}
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
const char *Global::Locate(const char *resfile) const
{
#ifdef _WIN32
static char path[MAX_PATH];
#else
static char path[PATH_MAX];
#endif
std::vector<std::string>::const_iterator it = Internals->RessourcePaths.begin();
for( ; it != Internals->RessourcePaths.end(); ++it)
{
const std::string &p = *it;
gdcmDebugMacro( "Trying to locate in: " << p );
std::string fullpath = p + "/" + resfile;
if( System::FileExists(fullpath.c_str()) )
{
// we found a match
// check no invalid write access possible:
if( fullpath.size() >= sizeof(path) )
{
gdcmDebugMacro( "Impossible happen: path is too long" );
return NULL;
}
strcpy(path, fullpath.c_str() );
return path;
}
}
// no match sorry :(
return NULL;
}
Dicts const &Global::GetDicts() const
{
assert( !Internals->GlobalDicts.IsEmpty() );
return Internals->GlobalDicts;
}
Dicts &Global::GetDicts()
{
assert( !Internals->GlobalDicts.IsEmpty() );
return Internals->GlobalDicts;
}
Defs const &Global::GetDefs() const
{
assert( !Internals->GlobalDefs.IsEmpty() );
return Internals->GlobalDefs;
}
Global& Global::GetInstance()
{
return GlobalInstance;
}
// Purposely not initialized. ClassInitialize will handle it.
GlobalInternal * Global::Internals;
} // end namespace gdcm
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