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openmesh/Core/IO/SR_binary_spec.hh
Jan Möbius 97f515985d First checkin for OpenMesh 2.0 
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@2 fdac6126-5c0c-442c-9429-916003d36597
2009-02-06 13:37:46 +00:00

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//=============================================================================
//
// OpenMesh
// Copyright (C) 2003 by Computer Graphics Group, RWTH Aachen
// www.openmesh.org
//
//-----------------------------------------------------------------------------
//
// License
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, version 2.1.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
//-----------------------------------------------------------------------------
//
// $Revision: 4333 $
// $Date: 2009-01-16 17:13:47 +0100 (Fr, 16. Jan 2009) $
//
//=============================================================================
//=============================================================================
//
// Helper Functions for binary reading / writing
//
//=============================================================================
#ifndef OPENMESH_SR_BINARY_SPEC_HH
#define OPENMESH_SR_BINARY_SPEC_HH
//== INCLUDES =================================================================
#include <OpenMesh/Core/System/config.h>
// -------------------- STL
#include <iterator>
#include <string>
#if defined(OM_CC_GCC) && (OM_CC_VERSION < 30000)
# include <OpenMesh/Tools/Utils/NumLimitsT.hh>
#else
# include <limits>
#endif
#include <vector>
#include <stdexcept> // logic_error
#include <numeric> // accumulate
// -------------------- OpenMesh
#include <OpenMesh/Core/Geometry/VectorT.hh>
#include <OpenMesh/Core/Mesh/Status.hh>
#include <OpenMesh/Core/IO/SR_types.hh>
#include <OpenMesh/Core/IO/SR_rbo.hh>
#include <OpenMesh/Core/IO/SR_binary.hh>
//== NAMESPACES ===============================================================
namespace OpenMesh {
namespace IO {
//=============================================================================
#ifndef DOXY_IGNORE_THIS
//-----------------------------------------------------------------------------
// struct binary, helper for storing/restoring
#define SIMPLE_BINARY( T ) \
template <> struct binary< T > { \
typedef T value_type; \
static const bool is_streamable = true; \
static size_t size_of(const value_type&) { return sizeof(value_type); } \
static size_t size_of(void) { return sizeof(value_type); } \
static size_t store( std::ostream& _os, const value_type& _val, \
bool _swap=false) { \
value_type tmp = _val; \
if (_swap) reverse_byte_order(tmp); \
_os.write( (const char*)&tmp, sizeof(value_type) ); \
return _os.good() ? sizeof(value_type) : 0; \
} \
\
static size_t restore( std::istream& _is, value_type& _val, \
bool _swap=false) { \
_is.read( (char*)&_val, sizeof(value_type) ); \
if (_swap) reverse_byte_order(_val); \
return _is.good() ? sizeof(value_type) : 0; \
} \
}
SIMPLE_BINARY(bool);
// SIMPLE_BINARY(int);
// Why is this needed? Should not be used as not 32 bit compatible
SIMPLE_BINARY(unsigned long);
SIMPLE_BINARY(float);
SIMPLE_BINARY(double);
SIMPLE_BINARY(long double);
SIMPLE_BINARY(int8_t);
SIMPLE_BINARY(int16_t);
SIMPLE_BINARY(int32_t);
SIMPLE_BINARY(int64_t);
SIMPLE_BINARY(uint8_t);
SIMPLE_BINARY(uint16_t);
SIMPLE_BINARY(uint32_t);
SIMPLE_BINARY(uint64_t);
#undef SIMPLE_BINARY
#define VECTORT_BINARY( T ) \
template <> struct binary< T > { \
typedef T value_type; \
static const bool is_streamable = true; \
static size_t size_of(void) { return sizeof(value_type); } \
static size_t size_of(const value_type&) { return size_of(); } \
static size_t store( std::ostream& _os, const value_type& _val, \
bool _swap=false) { \
value_type tmp = _val; \
size_t i, b = size_of(_val), N = value_type::size_; \
if (_swap) for (i=0; i<N; ++i) \
reverse_byte_order( tmp[i] ); \
_os.write( (const char*)&tmp[0], b ); \
return _os.good() ? b : 0; \
} \
\
static size_t restore( std::istream& _is, value_type& _val, \
bool _swap=false) { \
size_t i, N=value_type::size_; \
size_t b = N * sizeof(value_type::value_type); \
_is.read( (char*)&_val[0], b ); \
if (_swap) for (i=0; i<N; ++i) \
reverse_byte_order( _val[i] ); \
return _is.good() ? b : 0; \
} \
}
#define VECTORTS_BINARY( N ) \
VECTORT_BINARY( Vec##N##c ); \
VECTORT_BINARY( Vec##N##uc ); \
VECTORT_BINARY( Vec##N##s ); \
VECTORT_BINARY( Vec##N##us ); \
VECTORT_BINARY( Vec##N##i ); \
VECTORT_BINARY( Vec##N##ui ); \
VECTORT_BINARY( Vec##N##f ); \
VECTORT_BINARY( Vec##N##d );
VECTORTS_BINARY( 1 );
VECTORTS_BINARY( 2 );
VECTORTS_BINARY( 3 );
VECTORTS_BINARY( 4 );
VECTORTS_BINARY( 6 );
#undef VECTORTS_BINARY
#undef VECTORT_BINARY
template <> struct binary< std::string > {
typedef std::string value_type;
typedef uint16_t length_t;
static const bool is_streamable = true;
static size_t size_of() { return UnknownSize; }
static size_t size_of(const value_type &_v)
{ return sizeof(length_t) + _v.size(); }
static
size_t store(std::ostream& _os, const value_type& _v, bool _swap=false)
{
#if defined(OM_CC_GCC) && (OM_CC_VERSION < 30000)
if (_v.size() < Utils::NumLimitsT<length_t>::max() )
#else
if (_v.size() < std::numeric_limits<length_t>::max() )
#endif
{
length_t len = _v.size();
if (_swap) reverse_byte_order(len);
size_t bytes = binary<length_t>::store( _os, len, _swap );
_os.write( _v.data(), len );
return _os.good() ? len+bytes : 0;
}
throw std::runtime_error("Cannot store string longer than 64Kb");
}
static
size_t restore(std::istream& _is, value_type& _val, bool _swap=false)
{
length_t len;
size_t bytes = binary<length_t>::restore( _is, len, _swap );
if (_swap)
reverse_byte_order(len);
_val.resize(len);
_is.read( const_cast<char*>(_val.data()), len );
return _is.good() ? (len+bytes) : 0;
}
};
template <> struct binary<OpenMesh::Attributes::StatusInfo>
{
typedef OpenMesh::Attributes::StatusInfo value_type;
typedef value_type::value_type status_t;
static const bool is_streamable = true;
static size_t size_of() { return sizeof(status_t); }
static size_t size_of(const value_type&) { return size_of(); }
static size_t n_bytes(size_t _n_elem)
{ return _n_elem*sizeof(status_t); }
static
size_t store(std::ostream& _os, const value_type& _v, bool _swap=false)
{
status_t v=_v.bits();
return binary<status_t>::store(_os, v, _swap);
}
static
size_t restore( std::istream& _os, value_type& _v, bool _swap=false)
{
status_t v;
size_t b = binary<status_t>::restore(_os, v, _swap);
_v.set_bits(v);
return b;
}
};
//-----------------------------------------------------------------------------
// std::vector<T> specializations for struct binary<>
template <typename T>
struct FunctorStore {
FunctorStore( std::ostream& _os, bool _swap) : os_(_os), swap_(_swap) { }
size_t operator () ( size_t _v1, const T& _s2 )
{ return _v1+binary<T>::store(os_, _s2, swap_ ); }
std::ostream& os_;
bool swap_;
};
template <typename T>
struct FunctorRestore {
FunctorRestore( std::istream& _is, bool _swap) : is_(_is), swap_(_swap) { }
size_t operator () ( size_t _v1, T& _s2 )
{ return _v1+binary<T>::restore(is_, _s2, swap_ ); }
std::istream& is_;
bool swap_;
};
#include <OpenMesh/Core/IO/SR_binary_vector_of_fundamentals.inl>
#include <OpenMesh/Core/IO/SR_binary_vector_of_string.inl>
#include <OpenMesh/Core/IO/SR_binary_vector_of_bool.inl>
// ----------------------------------------------------------------------------
#endif // DOXY_IGNORE_THIS
//=============================================================================
} // namespace IO
} // namespace OpenMesh
//=============================================================================
#endif // OPENMESH_SR_BINARY_SPEC_HH defined
//=============================================================================
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