OpenMesh: OpenMesh/Core/IO/SR_binary_spec.hh Source File

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SR_binary_spec.hh
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41
42
43
44
45 //=============================================================================
46 //
47 // Helper Functions for binary reading / writing
48 //
49 //=============================================================================
50
51 #ifndef OPENMESH_SR_BINARY_SPEC_HH
52 #define OPENMESH_SR_BINARY_SPEC_HH
53
54 //== INCLUDES =================================================================
55
56 #include <OpenMesh/Core/System/config.h>
57 // -------------------- STL
58 #include <iterator>
59 #include <string>
60 #if defined(OM_CC_GCC) && (OM_CC_VERSION < 30000)
61 # include <OpenMesh/Tools/Utils/NumLimitsT.hh>
62 #else
63 # include <limits>
64 #endif
65 #include <vector>
66 #include <stdexcept> // logic_error
67 #include <numeric> // accumulate
68 // -------------------- OpenMesh
69 #include <OpenMesh/Core/Geometry/VectorT.hh>
70 #include <OpenMesh/Core/Mesh/Status.hh>
71 #include <OpenMesh/Core/IO/SR_types.hh>
72 #include <OpenMesh/Core/IO/SR_rbo.hh>
73 #include <OpenMesh/Core/IO/SR_binary.hh>
74
75
76 #include <OpenMesh/Core/Utils/typename.hh>
77
78 #include <iostream>
79
80 //== NAMESPACES ===============================================================
81
82 namespace OpenMesh {
83 namespace IO {
84
85
86 //=============================================================================
87
88 #ifndef DOXY_IGNORE_THIS
89
90 //-----------------------------------------------------------------------------
91 // struct binary, helper for storing/restoring
92
93 #define SIMPLE_BINARY( T ) \
94 template <> struct binary< T > { \
95 typedef T value_type; \
96 static const bool is_streamable = true; \
97 static size_t size_of(const value_type&) { return sizeof(value_type); } \
98 static size_t size_of(void) { return sizeof(value_type); } \
99 static std::string type_identifier(void) { return #T; } \
100 static size_t store( std::ostream& _os, const value_type& _val, \
101 bool _swap=false) { \
102 value_type tmp = _val; \
103 if (_swap) reverse_byte_order(tmp); \
104 _os.write( (const char*)&tmp, sizeof(value_type) ); \
105 return _os.good() ? sizeof(value_type) : 0; \
106 } \
107 \
108 static size_t restore( std::istream& _is, value_type& _val, \
109 bool _swap=false) { \
110 _is.read( (char*)&_val, sizeof(value_type) ); \
111 if (_swap) reverse_byte_order(_val); \
112 return _is.good() ? sizeof(value_type) : 0; \
113 } \
114 }
115
116 SIMPLE_BINARY(bool);
117 //SIMPLE_BINARY(int);
118
119 // Why is this needed? Should not be used as not 32 bit compatible
120 //SIMPLE_BINARY(unsigned long);
121 SIMPLE_BINARY(float);
122 SIMPLE_BINARY(double);
123 SIMPLE_BINARY(long double);
124 SIMPLE_BINARY(char);
125
126 SIMPLE_BINARY(int8_t);
127 SIMPLE_BINARY(int16_t);
128 SIMPLE_BINARY(int32_t);
129 //SIMPLE_BINARY(int64_t); // TODO: This does not work. Find out why.
130 SIMPLE_BINARY(uint8_t);
131 SIMPLE_BINARY(uint16_t);
132 SIMPLE_BINARY(uint32_t);
133 SIMPLE_BINARY(uint64_t);
134
135 //handles
136 SIMPLE_BINARY(FaceHandle);
137 SIMPLE_BINARY(EdgeHandle);
138 SIMPLE_BINARY(HalfedgeHandle);
139 SIMPLE_BINARY(VertexHandle);
140 SIMPLE_BINARY(MeshHandle);
141
142 #undef SIMPLE_BINARY
143
144 // For unsigned long which is of size 64 bit on 64 bit
145 // architectures: convert into 32 bit unsigned integer value
146 // in order to stay compatible between 32/64 bit architectures.
147 // This allows cross reading BUT forbids storing unsigned longs
148 // as data type since higher order word (4 bytes) will be truncated.
149 // Does not work in case the data type that is to be stored
150 // exceeds the value range of unsigned int in size, which is improbable...
151
152 #define SIMPLE_BINARY( T ) \
153 template <> struct binary< T > { \
154 typedef T value_type; \
155 static const bool is_streamable = true; \
156 static size_t size_of(const value_type&) { return sizeof(value_type); } \
157 static size_t size_of(void) { return sizeof(value_type); } \
158 static std::string type_identifier(void) { return #T; } \
159 static size_t store( std::ostream& _os, const value_type& _val, \
160 bool _swap=false) { \
161 value_type tmp = _val; \
162 if (_swap) reverse_byte_order(tmp); \
163 /* Convert unsigned long to unsigned int for compatibility reasons */ \
164 unsigned int t1 = static_cast<unsigned int>(tmp); \
165 _os.write( (const char*)&t1, sizeof(unsigned int) ); \
166 return _os.good() ? sizeof(unsigned int) : 0; \
167 } \
168 \
169 static size_t restore( std::istream& _is, value_type& _val, \
170 bool _swap=false) { \
171 unsigned int t1; \
172 _is.read( (char*)&t1, sizeof(unsigned int) ); \
173 _val = t1; \
174 if (_swap) reverse_byte_order(_val); \
175 return _is.good() ? sizeof(unsigned int) : 0; \
176 } \
177 }
178
179 SIMPLE_BINARY(unsigned long);
180
181 #undef SIMPLE_BINARY
182
183 #define VECTORT_BINARY( T ) \
184 template <> struct binary< T > { \
185 typedef T value_type; \
186 static const bool is_streamable = true; \
187 static size_t size_of(void) { return sizeof(value_type); } \
188 static size_t size_of(const value_type&) { return size_of(); } \
189 static std::string type_identifier(void) { return #T; } \
190 static size_t store( std::ostream& _os, const value_type& _val, \
191 bool _swap=false) { \
192 value_type tmp = _val; \
193 size_t i, b = size_of(_val), N = value_type::size_; \
194 if (_swap) \
195 for (i=0; i<N; ++i) \
196 reverse_byte_order( tmp[i] ); \
197 _os.write( (const char*)&tmp[0], b ); \
198 return _os.good() ? b : 0; \
199 } \
200 \
201 static size_t restore( std::istream& _is, value_type& _val, \
202 bool _swap=false) { \
203 size_t i, N=value_type::size_; \
204 size_t b = N * sizeof(value_type::value_type); \
205 _is.read( (char*)&_val[0], b ); \
206 if (_swap) for (i=0; i<N; ++i) \
207 reverse_byte_order( _val[i] ); \
208 return _is.good() ? b : 0; \
209 } \
210 }
211
212 #define VECTORTS_BINARY( N ) \
213 VECTORT_BINARY( Vec##N##c ); \
214 VECTORT_BINARY( Vec##N##uc ); \
215 VECTORT_BINARY( Vec##N##s ); \
216 VECTORT_BINARY( Vec##N##us ); \
217 VECTORT_BINARY( Vec##N##i ); \
218 VECTORT_BINARY( Vec##N##ui ); \
219 VECTORT_BINARY( Vec##N##f ); \
220 VECTORT_BINARY( Vec##N##d );
221
222 VECTORTS_BINARY( 1 )
223 VECTORTS_BINARY( 2 )
224 VECTORTS_BINARY( 3 )
225 VECTORTS_BINARY( 4 )
226 VECTORTS_BINARY( 5 )
227 VECTORTS_BINARY( 6 )
228
229 #undef VECTORTS_BINARY
230 #undef VECTORT_BINARY
231
232 template <> struct binary< std::string > {
233 typedef std::string value_type;
234 typedef uint16_t length_t;
235
236 static const bool is_streamable = true;
237
238 static size_t size_of() { return UnknownSize; }
239 static size_t size_of(const value_type &_v)
240 { return sizeof(length_t) + _v.size(); }
241 static std::string type_identifier(void) { return "std::string"; }
242 static
243 size_t store(std::ostream& _os, const value_type& _v, bool _swap=false)
244 {
245 #if defined(OM_CC_GCC) && (OM_CC_VERSION < 30000)
246 if (_v.size() < Utils::NumLimitsT<length_t>::max() )
247 #else
248 if (_v.size() < std::numeric_limits<length_t>::max() )
249 #endif
250 {
251 length_t len = length_t(_v.size());
252
253 size_t bytes = binary<length_t>::store( _os, len, _swap );
254 _os.write( _v.data(), len );
255 return _os.good() ? len+bytes : 0;
256 }
257 throw std::runtime_error("Cannot store string longer than 64Kb");
258 }
259
260 static
261 size_t restore(std::istream& _is, value_type& _val, bool _swap=false)
262 {
263 length_t len;
264 size_t bytes = binary<length_t>::restore( _is, len, _swap );
265 _val.resize(len);
266 _is.read( const_cast<char*>(_val.data()), len );
267
268 return _is.good() ? (len+bytes) : 0;
269 }
270 };
271
272 template <> struct binary<OpenMesh::Attributes::StatusInfo>
273 {
274 typedef OpenMesh::Attributes::StatusInfo value_type;
275 typedef value_type::value_type status_t;
276
277 static const bool is_streamable = true;
278
279 static size_t size_of() { return sizeof(status_t); }
280 static size_t size_of(const value_type&) { return size_of(); }
281
282 static std::string type_identifier(void) { return "StatusInfo";}
283 static size_t n_bytes(size_t _n_elem)
284 { return _n_elem*sizeof(status_t); }
285
286 static
287 size_t store(std::ostream& _os, const value_type& _v, bool _swap=false)
288 {
289 status_t v=_v.bits();
290 return binary<status_t>::store(_os, v, _swap);
291 }
292
293 static
294 size_t restore( std::istream& _os, value_type& _v, bool _swap=false)
295 {
296 status_t v;
297 size_t b = binary<status_t>::restore(_os, v, _swap);
298 _v.set_bits(v);
299 return b;
300 }
301 };
302
303
304 //-----------------------------------------------------------------------------
305 // std::vector<T> specializations for struct binary<>
306
307 template <typename T>
308 struct FunctorStore {
309 FunctorStore( std::ostream& _os, bool _swap) : os_(_os), swap_(_swap) { }
310 size_t operator () ( size_t _v1, const T& _s2 )
311 { return _v1+binary<T>::store(os_, _s2, swap_ ); }
312
313 std::ostream& os_;
314 bool swap_;
315 };
316
317
318 template <typename T>
319 struct FunctorRestore {
320 FunctorRestore( std::istream& _is, bool _swap) : is_(_is), swap_(_swap) { }
321 size_t operator () ( size_t _v1, T& _s2 )
322 { return _v1+binary<T>::restore(is_, _s2, swap_ ); }
323 std::istream& is_;
324 bool swap_;
325 };
326
327 template <typename T>
328 struct binary< std::vector< T >, typename std::enable_if<std::is_default_constructible<T>::value>::type > {
329 typedef std::vector< T > value_type;
330 typedef typename value_type::value_type elem_type;
331
332 static const bool is_streamable = binary<T>::is_streamable;
333 static size_t size_of(bool _store_size = true)
334 { return IO::UnknownSize; }
335
336 static size_t size_of(const value_type& _v, bool _store_size = true)
337 {
338 if(binary<T>::size_of() != IO::UnknownSize)
339 {
340 unsigned int N = static_cast<unsigned int>(_v.size());
341 auto res = binary<T>::size_of()*_v.size() + (_store_size? sizeof(decltype(N)) : 0);
342 return res;
343 }
344 else
345 {
346 size_t size = 0;
347 for(auto v : _v)
348 size += binary<T>::size_of(v);
349 if(_store_size)
350 size += binary<unsigned int>::size_of();
351
352 return size;
353 }
354 }
355
356 static std::string type_identifier(void) { return "std::vector<" + binary<T>::type_identifier() + ">"; }
357 static
358 size_t store(std::ostream& _os, const value_type& _v, bool _swap=false, bool _store_size = true) {
359 size_t bytes=0;
360 if(_store_size)
361 {
362 unsigned int N = static_cast<unsigned int>(_v.size());
363 bytes += binary<unsigned int>::store( _os, N, _swap );
364 }
365 if (_swap)
366 bytes += std::accumulate( _v.begin(), _v.end(), static_cast<size_t>(0),
367 FunctorStore<elem_type>(_os,_swap) );
368 else
369 {
370 auto elem_size = binary<elem_type>::size_of();
371 if (elem_size != IO::UnknownSize && elem_size == sizeof(elem_type))
372 {
373 // size of all elements is known, equal, and densely packed in vector.
374 // Just store vector data
375 auto bytes_of_vec = size_of(_v, false);
376 bytes += bytes_of_vec;
377 if (_v.size() > 0)
378 _os.write( reinterpret_cast<const char*>(&_v[0]), bytes_of_vec);
379 }
380 else
381 {
382 // store individual elements
383 for (const auto& v : _v)
384 bytes += binary<elem_type>::store(_os, v, _swap);
385 }
386 }
387 return _os.good() ? bytes : 0;
388 }
389
390 static size_t restore(std::istream& _is, value_type& _v, bool _swap=false, bool _restore_size = true) {
391
392 size_t bytes=0;
393
394 if(_restore_size)
395 {
396 unsigned int size_of_vec;
397 bytes += binary<unsigned int>::restore(_is, size_of_vec, _swap);
398 _v.resize(size_of_vec);
399 }
400
401 if ( _swap)
402 bytes += std::accumulate( _v.begin(), _v.end(), size_t(0),
403 FunctorRestore<elem_type>(_is, _swap) );
404 else
405 {
406 auto elem_size = binary<elem_type>::size_of();
407 if (elem_size != IO::UnknownSize && elem_size == sizeof(elem_type))
408 {
409 // size of all elements is known, equal, and densely packed in vector.
410 // Just restore vector data
411 auto bytes_of_vec = size_of(_v, false);
412 bytes += bytes_of_vec;
413 if (_v.size() > 0)
414 _is.read( reinterpret_cast<char*>(&_v[0]), bytes_of_vec );
415 }
416 else
417 {
418 // restore individual elements
419 for (auto& v : _v)
420 bytes += binary<elem_type>::restore(_is, v, _swap);
421 }
422 }
423 return _is.good() ? bytes : 0;
424 }
425 };
426
427 #include <OpenMesh/Core/IO/SR_binary_vector_of_bool.inl>
428
429 // ----------------------------------------------------------------------------
430
431 #endif // DOXY_IGNORE_THIS
432
433 //=============================================================================
434 } // namespace IO
435 } // namespace OpenMesh
436 //=============================================================================
437 #endif // OPENMESH_SR_BINARY_SPEC_HH defined
438 //=============================================================================
439
NumLimitsT.hh
Temporary solution until std::numeric_limits is standard.
OpenMesh
Contains all the mesh ingredients like the polygonal mesh, the triangle mesh, different mesh kernels ...
Definition: MeshItems.hh:59
OpenMesh::IO::int8_t
signed char int8_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:80
OpenMesh::IO::int16_t
short int16_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:81
OpenMesh::IO::uint64_t
unsigned long long uint64_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:89
OpenMesh::IO::uint32_t
unsigned int uint32_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:85
OpenMesh::IO::uint16_t
unsigned short uint16_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:81
OpenMesh::IO::int32_t
int int32_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:85
OpenMesh::IO::uint8_t
unsigned char uint8_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:80
OpenMesh::IO::binary::restore
static size_t restore(std::istream &, value_type &, bool=false, bool=true)
Restore a value of T and return the number of bytes read.
Definition: SR_binary.hh:126
OpenMesh::IO::binary::is_streamable
static const bool is_streamable
Can we store T? Set this to true in your specialization.
Definition: SR_binary.hh:106
OpenMesh::IO::binary::store
static size_t store(std::ostream &, const value_type &, bool=false, bool=true)
Store a value of T and return the number of bytes written.
Definition: SR_binary.hh:118
OpenMesh::IO::binary::type_identifier
static std::string type_identifier(void)
A string that identifies the type of T.
Definition: SR_binary.hh:114
OpenMesh::IO::binary::size_of
static size_t size_of(void)
What's the size of T? If it depends on the actual value (e.g. for vectors) return UnknownSize.
Definition: SR_binary.hh:109
OpenMesh::Attributes::StatusInfo
Add status information to a base class.
Definition: Status.hh:95
OpenMesh::Utils::NumLimitsT::max
static Scalar max()
Return the maximum absolte value a scalar type can store.
Definition: NumLimitsT.hh:97