Field3D
OData.cpp
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35 
36 #include "OGroup.h"
37 #include "OData.h"
38 #include "OStream.h"
39 
40 namespace Alembic {
41 namespace Ogawa {
42 namespace ALEMBIC_VERSION_NS {
43 
44 class OData::PrivateData
45 {
46 public:
47 
48  // for the empty dataset
49  PrivateData()
50  {
51  pos = 0;
52  size = 0;
53  }
54 
55  PrivateData(OStreamPtr iStream,
56  Alembic::Util::uint64_t iPos,
57  Alembic::Util::uint64_t iSize) :
58  stream(iStream), pos(iPos), size(iSize) {}
59 
60  ~PrivateData() {}
61 
62  OStreamPtr stream;
63 
64  Alembic::Util::uint64_t pos;
65  Alembic::Util::uint64_t size;
66 };
67 
68 OData::OData() : mData(new OData::PrivateData())
69 {
70 }
71 
72 OData::OData(OStreamPtr iStream,
73  Alembic::Util::uint64_t iPos,
74  Alembic::Util::uint64_t iSize)
75  : mData(new OData::PrivateData(iStream, iPos, iSize))
76 {
77 }
78 
79 OData::~OData()
80 {
81 }
82 
83 void OData::rewrite(Alembic::Util::uint64_t iSize, void * iData,
84  Alembic::Util::uint64_t iOffset)
85 {
86 
87  // don't write anything if we will write beyond our buffer or the
88  // stream is invalid
89  if (!mData->stream || iSize == 0 || mData->size == 0 ||
90  iOffset + iSize > mData->size)
91  {
92  return;
93  }
94 
95  // +8 is to account for the written out size
96  mData->stream->seek(mData->pos + iOffset + 8);
97  mData->stream->write(iData, iSize);
98 }
99 
100 Alembic::Util::uint64_t OData::getSize() const
101 {
102  return mData->size;
103 }
104 
105 Alembic::Util::uint64_t OData::getPos() const
106 {
107  return mData->pos;
108 }
109 
110 } // End namespace ALEMBIC_VERSION_NS
111 } // End namespace Ogawa
112 } // End namespace Alembic
Alembic
Definition: OgawaFwd.h:77