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ArraySampleKey.h
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36 
37 #ifndef Alembic_AbcCoreAbstract_ArraySampleKey_h
38 #define Alembic_AbcCoreAbstract_ArraySampleKey_h
39 
42 
43 namespace Alembic {
44 namespace AbcCoreAbstract {
45 namespace ALEMBIC_VERSION_NS {
46 
47 struct ArraySampleKey : public Alembic::Util::totally_ordered<ArraySampleKey>
48 {
49  //! total number of bytes of the sample as originally stored
50  uint64_t numBytes;
51 
52  //! Original POD as stored
54 
55  //! POD used at read time
57 
58  Digest digest;
59 
60  bool operator==( const ArraySampleKey &iRhs ) const
61  {
62  return ( ( numBytes == iRhs.numBytes ) &&
63  ( origPOD == iRhs.origPOD ) &&
64  ( readPOD == iRhs.readPOD ) &&
65  ( digest == iRhs.digest ) );
66  };
67 
68  bool operator<( const ArraySampleKey &iRhs ) const
69  {
70  return ( numBytes < iRhs.numBytes ? true :
71  ( numBytes > iRhs.numBytes ? false :
72 
73  ( origPOD < iRhs.origPOD ? true :
74  ( origPOD > iRhs.origPOD ? false :
75 
76  ( readPOD < iRhs.readPOD ? true :
77  ( readPOD > iRhs.readPOD ? false :
78 
79  ( digest < iRhs.digest ) ) ) ) ) ) );
80  };
81 
82 };
83 
84 //-*****************************************************************************
85 // Equality operator.
87 {
90  typedef bool result_type;
91 
92  bool operator()( ArraySampleKey const &a,
93  ArraySampleKey const &b ) const
94  {
95  return a == b;
96  }
97 };
98 
99 //-*****************************************************************************
100 // Hash function
101 inline size_t StdHash( ArraySampleKey const &a )
102 {
103  // Theoretically, the bits of our hash are uniformly
104  // randomly distributed, so it doesn't matter which of the 128
105  // bits we use to generate the 64 bits that we return as the hash
106  // key. So, I'll just do the simple thing.
107  return *(( const size_t * )&a.digest);
108 }
109 
110 //-*****************************************************************************
112 {
114  typedef size_t result_type;
115 
116  size_t operator()( ArraySampleKey const &a ) const
117  {
118  return StdHash( a );
119  }
120 };
121 
122 //-*****************************************************************************
123 template <class MAPPED>
125 {
126  typedef Alembic::Util::unordered_map<ArraySampleKey,
127  MAPPED,
130 };
131 
132 } // End namespace ALEMBIC_VERSION_NS
133 
134 using namespace ALEMBIC_VERSION_NS;
135 
136 } // End namespace AbcCoreAbstract
137 } // End namespace Alembic
138 
139 #endif
bool operator==(const ArraySampleKey &iRhs) const
uint64_t numBytes
total number of bytes of the sample as originally stored
PlainOldDataType origPOD
Original POD as stored.
GLboolean GLboolean GLboolean GLboolean a
Definition: glcorearb.h:1222
bool operator<(const ArraySampleKey &iRhs) const
bool operator()(ArraySampleKey const &a, ArraySampleKey const &b) const
Alembic::Util::unordered_map< ArraySampleKey, MAPPED, ArraySampleKeyStdHash, ArraySampleKeyEqualTo > umap_type
GLboolean GLboolean GLboolean b
Definition: glcorearb.h:1222
size_t StdHash(ArraySampleKey const &a)
PlainOldDataType readPOD
POD used at read time.
#define ALEMBIC_VERSION_NS
Definition: Foundation.h:88