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Merge pull request #3870 from martinus/master

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Added helpers to access objects while creating the flatbuffer.
This commit is contained in:
Wouter van Oortmerssen
2016-06-02 11:26:16 -07:00
parent e02ceca54b b3c35750c2
commit 886441df98
1 changed files with 11 additions and 0 deletions
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11
include/flatbuffers/flatbuffers.h
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@@ -1151,6 +1151,17 @@ template<typename T> const T *GetRoot(const void *buf) {
return GetMutableRoot<T>(const_cast<void *>(buf)); return GetMutableRoot<T>(const_cast<void *>(buf));
} }
/// Helpers to get a typed pointer to objects that are currently beeing built.
/// @warning Creating new objects will lead to reallocations and invalidates the pointer!
template<typename T> T *GetMutableTemporaryPointer(FlatBufferBuilder &fbb, Offset<T> offset) {
return reinterpret_cast<T *>(fbb.GetCurrentBufferPointer() +
fbb.GetSize() - offset.o);
}
template<typename T> const T *GetTemporaryPointer(FlatBufferBuilder &fbb, Offset<T> offset) {
return GetMutableTemporaryPointer<T>(fbb, offset);
}
// Helper to see if the identifier in a buffer has the expected value. // Helper to see if the identifier in a buffer has the expected value.
inline bool BufferHasIdentifier(const void *buf, const char *identifier) { inline bool BufferHasIdentifier(const void *buf, const char *identifier) {
return strncmp(reinterpret_cast<const char *>(buf) + sizeof(uoffset_t), return strncmp(reinterpret_cast<const char *>(buf) + sizeof(uoffset_t),