51 lines
1.8 KiB
Go
51 lines
1.8 KiB
Go
package flatbuffers
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// FlatBuffer is the interface that represents a flatbuffer.
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type FlatBuffer interface {
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Table() Table
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Init(buf []byte, i UOffsetT)
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}
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// GetRootAs is a generic helper to initialize a FlatBuffer with the provided buffer bytes and its data offset.
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func GetRootAs(buf []byte, offset UOffsetT, fb FlatBuffer) {
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n := GetUOffsetT(buf[offset:])
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fb.Init(buf, n+offset)
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}
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// GetSizePrefixedRootAs is a generic helper to initialize a FlatBuffer with the provided size-prefixed buffer
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// bytes and its data offset
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func GetSizePrefixedRootAs(buf []byte, offset UOffsetT, fb FlatBuffer) {
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n := GetUOffsetT(buf[offset+sizePrefixLength:])
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fb.Init(buf, n+offset+sizePrefixLength)
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}
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// GetSizePrefix reads the size from a size-prefixed flatbuffer
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func GetSizePrefix(buf []byte, offset UOffsetT) uint32 {
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return GetUint32(buf[offset:])
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}
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// GetIndirectOffset retrives the relative offset in the provided buffer stored at `offset`.
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func GetIndirectOffset(buf []byte, offset UOffsetT) UOffsetT {
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return offset + GetUOffsetT(buf[offset:])
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}
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// GetBufferIdentifier returns the file identifier as string
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func GetBufferIdentifier(buf []byte) string {
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return string(buf[SizeUOffsetT:][:fileIdentifierLength])
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}
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// GetBufferIdentifier returns the file identifier as string for a size-prefixed buffer
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func GetSizePrefixedBufferIdentifier(buf []byte) string {
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return string(buf[SizeUOffsetT+sizePrefixLength:][:fileIdentifierLength])
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}
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// BufferHasIdentifier checks if the identifier in a buffer has the expected value
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func BufferHasIdentifier(buf []byte, identifier string) bool {
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return GetBufferIdentifier(buf) == identifier
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}
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// BufferHasIdentifier checks if the identifier in a buffer has the expected value for a size-prefixed buffer
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func SizePrefixedBufferHasIdentifier(buf []byte, identifier string) bool {
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return GetSizePrefixedBufferIdentifier(buf) == identifier
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}
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