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/*
Copyright 2008 Brain Research Institute, Melbourne, Australia
Written by J-Donald Tournier, 27/06/08.
This file is part of MRtrix.
MRtrix is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
MRtrix is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with MRtrix. If not, see <http://www.gnu.org/licenses/>.
17-03-2009 J-Donald Tournier <d.tournier@brain.org.au>
* modify to allow use of either TR1 unordered map or SGI hash_map for the DICOM dictionary
*/
#ifndef __file_dicom_element_h__
#define __file_dicom_element_h__
#include "hash_map.h"
#include "file/mmap.h"
#include "file/dicom/definitions.h"
namespace MR {
namespace File {
namespace Dicom {
typedef enum _ElementType {
INVALID,
INT,
UINT,
FLOAT,
STRING,
SEQ,
OTHER
} ElementType;
class Sequence {
public:
Sequence (guint16 group, guint16 element, guint8* end) : group (group), element (element), end (end) { }
guint16 group, element;
guint8* end;
};
class Element {
protected:
static UnorderedMap<guint32, const gchar*>::Type dict;
static void init_dict();
File::MMap fmap;
void set_explicit_encoding();
bool read_GR_EL();
guint8* next;
guint8* start;
bool is_explicit;
bool is_BE;
bool previous_BO_was_BE;
public:
guint16 group, element, VR;
guint32 size;
guint8* data;
std::vector<Sequence> sequence;
void set (const String& filename);
bool read ();
bool is (guint16 group, guint16 element) const;
String tag_name () const;
guint32 tag () const;
ElementType type () const;
bool is_big_endian () const;
std::vector<gint32> get_int () const;
std::vector<guint32> get_uint () const;
std::vector<double> get_float () const;
std::vector<String> get_string () const;
guint offset (guint8* address) const;
guint level () const { return sequence.size(); }
void print () const;
friend std::ostream& operator<< (std::ostream& stream, const Element& item);
};
inline bool Element::is (guint16 Group, guint16 Element) const
{
if (group != Group) return (false);
return (element == Element);
}
inline bool Element::is_big_endian () const { return (is_BE); }
inline guint32 Element::tag () const
{
union __DICOM_group_element_pair__ { guint16 s[2]; guint32 i; } val = { {
#if G_BYTE_ORDER == G_BIG_ENDIAN
group, element
#else
element, group
#endif
} };
return (val.i);
}
inline String Element::tag_name() const
{
if (dict.empty()) init_dict();
const gchar* s = dict[tag()];
return (s ? s : "");
}
inline guint Element::offset (guint8* address) const { return (address - (guint8*) fmap.address()); }
}
}
}
#endif
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