Developer Documentation

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 //== NAMESPACES ===============================================================
76
77 namespace OpenMesh {
78 namespace IO {
79
80
81 //=============================================================================
82
83 #ifndef DOXY_IGNORE_THIS
84
85 //-----------------------------------------------------------------------------
86 // struct binary, helper for storing/restoring
87
88 #define SIMPLE_BINARY( T ) \
89 template <> struct binary< T > { \
90 typedef T value_type; \
91 static const bool is_streamable = true; \
92 static size_t size_of(const value_type&) { return sizeof(value_type); } \
93 static size_t size_of(void) { return sizeof(value_type); } \
94 static size_t store( std::ostream& _os, const value_type& _val, \
95 bool _swap=false) { \
96 value_type tmp = _val; \
97 if (_swap) reverse_byte_order(tmp); \
98 _os.write( (const char*)&tmp, sizeof(value_type) ); \
99 return _os.good() ? sizeof(value_type) : 0; \
100 } \
101 \
102 static size_t restore( std::istream& _is, value_type& _val, \
103 bool _swap=false) { \
104 _is.read( (char*)&_val, sizeof(value_type) ); \
105 if (_swap) reverse_byte_order(_val); \
106 return _is.good() ? sizeof(value_type) : 0; \
107 } \
108 }
109
110 SIMPLE_BINARY(bool);
111 //SIMPLE_BINARY(int);
112
113 // Why is this needed? Should not be used as not 32 bit compatible
114 //SIMPLE_BINARY(unsigned long);
115 SIMPLE_BINARY(float);
116 SIMPLE_BINARY(double);
117 SIMPLE_BINARY(long double);
118 SIMPLE_BINARY(char);
119
120 SIMPLE_BINARY(int8_t);
121 SIMPLE_BINARY(int16_t);
122 SIMPLE_BINARY(int32_t);
123 SIMPLE_BINARY(int64_t);
124 SIMPLE_BINARY(uint8_t);
125 SIMPLE_BINARY(uint16_t);
126 SIMPLE_BINARY(uint32_t);
127 SIMPLE_BINARY(uint64_t);
128
129 #undef SIMPLE_BINARY
130
131 // For unsigned long which is of size 64 bit on 64 bit
132 // architectures: convert into 32 bit unsigned integer value
133 // in order to stay compatible between 32/64 bit architectures.
134 // This allows cross reading BUT forbids storing unsigned longs
135 // as data type since higher order word (4 bytes) will be truncated.
136 // Does not work in case the data type that is to be stored
137 // exceeds the value range of unsigned int in size, which is improbable...
138
139 #define SIMPLE_BINARY( T ) \
140 template <> struct binary< T > { \
141 typedef T value_type; \
142 static const bool is_streamable = true; \
143 static size_t size_of(const value_type&) { return sizeof(value_type); } \
144 static size_t size_of(void) { return sizeof(value_type); } \
145 static size_t store( std::ostream& _os, const value_type& _val, \
146 bool _swap=false) { \
147 value_type tmp = _val; \
148 if (_swap) reverse_byte_order(tmp); \
149 /* Convert unsigned long to unsigned int for compatibility reasons */ \
150 unsigned int t1 = static_cast<unsigned int>(tmp); \
151 _os.write( (const char*)&t1, sizeof(unsigned int) ); \
152 return _os.good() ? sizeof(unsigned int) : 0; \
153 } \
154 \
155 static size_t restore( std::istream& _is, value_type& _val, \
156 bool _swap=false) { \
157 unsigned int t1; \
158 _is.read( (char*)&t1, sizeof(unsigned int) ); \
159 _val = t1; \
160 if (_swap) reverse_byte_order(_val); \
161 return _is.good() ? sizeof(unsigned int) : 0; \
162 } \
163 }
164
165 SIMPLE_BINARY(unsigned long);
166
167 #undef SIMPLE_BINARY
168
169 #define VECTORT_BINARY( T ) \
170 template <> struct binary< T > { \
171 typedef T value_type; \
172 static const bool is_streamable = true; \
173 static size_t size_of(void) { return sizeof(value_type); } \
174 static size_t size_of(const value_type&) { return size_of(); } \
175 static size_t store( std::ostream& _os, const value_type& _val, \
176 bool _swap=false) { \
177 value_type tmp = _val; \
178 size_t i, b = size_of(_val), N = value_type::size_; \
179 if (_swap) for (i=0; i<N; ++i) \
180 reverse_byte_order( tmp[i] ); \
181 _os.write( (const char*)&tmp[0], b ); \
182 return _os.good() ? b : 0; \
183 } \
184 \
185 static size_t restore( std::istream& _is, value_type& _val, \
186 bool _swap=false) { \
187 size_t i, N=value_type::size_; \
188 size_t b = N * sizeof(value_type::value_type); \
189 _is.read( (char*)&_val[0], b ); \
190 if (_swap) for (i=0; i<N; ++i) \
191 reverse_byte_order( _val[i] ); \
192 return _is.good() ? b : 0; \
193 } \
194 }
195
196 #define VECTORTS_BINARY( N ) \
197 VECTORT_BINARY( Vec##N##c ); \
198 VECTORT_BINARY( Vec##N##uc ); \
199 VECTORT_BINARY( Vec##N##s ); \
200 VECTORT_BINARY( Vec##N##us ); \
201 VECTORT_BINARY( Vec##N##i ); \
202 VECTORT_BINARY( Vec##N##ui ); \
203 VECTORT_BINARY( Vec##N##f ); \
204 VECTORT_BINARY( Vec##N##d );
205
206 VECTORTS_BINARY( 1 )
207 VECTORTS_BINARY( 2 )
208 VECTORTS_BINARY( 3 )
209 VECTORTS_BINARY( 4 )
210 VECTORTS_BINARY( 6 )
211
212 #undef VECTORTS_BINARY
213 #undef VECTORT_BINARY
214
215 template <> struct binary< std::string > {
216 typedef std::string value_type;
217 typedef uint16_t length_t;
218
219 static const bool is_streamable = true;
220
221 static size_t size_of() { return UnknownSize; }
222 static size_t size_of(const value_type &_v)
223 { return sizeof(length_t) + _v.size(); }
224
225 static
226 size_t store(std::ostream& _os, const value_type& _v, bool _swap=false)
227 {
228 #if defined(OM_CC_GCC) && (OM_CC_VERSION < 30000)
229 if (_v.size() < Utils::NumLimitsT<length_t>::max() )
230 #else
231 if (_v.size() < std::numeric_limits<length_t>::max() )
232 #endif
233 {
234 length_t len = length_t(_v.size());
235
236 size_t bytes = binary<length_t>::store( _os, len, _swap );
237 _os.write( _v.data(), len );
238 return _os.good() ? len+bytes : 0;
239 }
240 throw std::runtime_error("Cannot store string longer than 64Kb");
241 }
242
243 static
244 size_t restore(std::istream& _is, value_type& _val, bool _swap=false)
245 {
246 length_t len;
247 size_t bytes = binary<length_t>::restore( _is, len, _swap );
248 _val.resize(len);
249 _is.read( const_cast<char*>(_val.data()), len );
250
251 return _is.good() ? (len+bytes) : 0;
252 }
253 };
254
255
256 template <> struct binary<OpenMesh::Attributes::StatusInfo>
257 {
258 typedef OpenMesh::Attributes::StatusInfo value_type;
259 typedef value_type::value_type status_t;
260
261 static const bool is_streamable = true;
262
263 static size_t size_of() { return sizeof(status_t); }
264 static size_t size_of(const value_type&) { return size_of(); }
265
266 static size_t n_bytes(size_t _n_elem)
267 { return _n_elem*sizeof(status_t); }
268
269 static
270 size_t store(std::ostream& _os, const value_type& _v, bool _swap=false)
271 {
272 status_t v=_v.bits();
273 return binary<status_t>::store(_os, v, _swap);
274 }
275
276 static
277 size_t restore( std::istream& _os, value_type& _v, bool _swap=false)
278 {
279 status_t v;
280 size_t b = binary<status_t>::restore(_os, v, _swap);
281 _v.set_bits(v);
282 return b;
283 }
284 };
285
286
287 //-----------------------------------------------------------------------------
288 // std::vector<T> specializations for struct binary<>
289
290 template <typename T>
291 struct FunctorStore {
292 FunctorStore( std::ostream& _os, bool _swap) : os_(_os), swap_(_swap) { }
293 size_t operator () ( size_t _v1, const T& _s2 )
294 { return _v1+binary<T>::store(os_, _s2, swap_ ); }
295
296 std::ostream& os_;
297 bool swap_;
298 };
299
300
301 template <typename T>
302 struct FunctorRestore {
303 FunctorRestore( std::istream& _is, bool _swap) : is_(_is), swap_(_swap) { }
304 size_t operator () ( size_t _v1, T& _s2 )
305 { return _v1+binary<T>::restore(is_, _s2, swap_ ); }
306 std::istream& is_;
307 bool swap_;
308 };
309
310 #include <OpenMesh/Core/IO/SR_binary_vector_of_fundamentals.inl>
311 #include <OpenMesh/Core/IO/SR_binary_vector_of_string.inl>
312 #include <OpenMesh/Core/IO/SR_binary_vector_of_bool.inl>
313
314 // ----------------------------------------------------------------------------
315
316 #endif // DOXY_IGNORE_THIS
317
318 //=============================================================================
319 } // namespace IO
320 } // namespace OpenMesh
321 //=============================================================================
322 #endif // OPENMESH_SR_BINARY_SPEC_HH defined
323 //=============================================================================
324
OpenMesh::IO::size_of
size_t size_of(const T &_v)
Definition: StoreRestore.hh:89
OpenMesh::IO::uint8_t
unsigned char uint8_t
Definition: SR_types.hh:80
OpenMesh::IO::uint64_t
unsigned long long uint64_t
Definition: SR_types.hh:89
OpenMesh::IO::uint32_t
unsigned int uint32_t
Definition: SR_types.hh:85
OpenMesh::IO::int64_t
long long int64_t
Definition: SR_types.hh:89
OpenMesh::IO::int8_t
signed char int8_t
Definition: SR_types.hh:80
NumLimitsT.hh
config.h
OpenMesh::IO::uint16_t
unsigned short uint16_t
Definition: SR_types.hh:81
std
STL namespace.
OpenMesh::IO::int32_t
int int32_t
Definition: SR_types.hh:85
OpenMesh::IO::int16_t
short int16_t
Definition: SR_types.hh:81
OpenMesh::Utils::NumLimitsT::max
static Scalar max()
Return the maximum absolte value a scalar type can store.
Definition: NumLimitsT.hh:97
OpenMesh
Definition: MeshItems.hh:59
OpenMesh::Attributes::StatusInfo
Definition: Status.hh:94