ml
53 lines
1.7 KiB
Go
53 lines
1.7 KiB
Go
package lgres
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import (
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"math"
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)
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type resourceDirectoryEntry struct {
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ID uint16
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UnpackedLengthAndResourceType uint32
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PackedLengthAndContentType uint32
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}
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func maskBits(field uint32, bitOffset uint, bitCount int) uint32 {
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return (field >> bitOffset) & uint32(^(uint64(math.MaxUint64) << uint64(bitCount)))
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}
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func setBits(field uint32, bitOffset uint, bitCount int, value uint32) uint32 {
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mask := uint32(^(uint64(math.MaxUint64) << uint64(bitCount)))
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return (field & (^mask << bitOffset)) | ((value & mask) << bitOffset)
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}
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func (entry *resourceDirectoryEntry) setUnpackedLength(value uint32) {
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entry.UnpackedLengthAndResourceType = setBits(entry.UnpackedLengthAndResourceType, 0, 24, value)
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}
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func (entry *resourceDirectoryEntry) unpackedLength() uint32 {
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return maskBits(entry.UnpackedLengthAndResourceType, 0, 24)
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}
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func (entry *resourceDirectoryEntry) setResourceType(value byte) {
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entry.UnpackedLengthAndResourceType = setBits(entry.UnpackedLengthAndResourceType, 24, 8, uint32(value))
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}
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func (entry *resourceDirectoryEntry) resourceType() byte {
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return byte(maskBits(entry.UnpackedLengthAndResourceType, 24, 8))
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}
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func (entry *resourceDirectoryEntry) setPackedLength(value uint32) {
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entry.PackedLengthAndContentType = setBits(entry.PackedLengthAndContentType, 0, 24, value)
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}
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func (entry *resourceDirectoryEntry) packedLength() uint32 {
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return maskBits(entry.PackedLengthAndContentType, 0, 24)
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}
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func (entry *resourceDirectoryEntry) setContentType(value byte) {
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entry.PackedLengthAndContentType = setBits(entry.PackedLengthAndContentType, 24, 8, uint32(value))
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}
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func (entry *resourceDirectoryEntry) contentType() byte {
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return byte(maskBits(entry.PackedLengthAndContentType, 24, 8))
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}
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