91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
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// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package nfs
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import (
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"encoding/binary"
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)
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// XDR maps the External Data Representation
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type xdr struct {
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data []byte
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offset uint32
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}
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func newXDR(data []byte) *xdr {
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x := makeXDR(data)
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return &x
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}
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func makeXDR(data []byte) xdr {
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return xdr{data: data, offset: 0}
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}
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func (r *xdr) size() int {
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return len(r.data)
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}
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func (r *xdr) getInt() int32 {
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i := int32(binary.BigEndian.Uint32(r.data[r.offset : r.offset+4]))
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r.offset += 4
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return int32(i)
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}
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func (r *xdr) getUInt() uint32 {
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i := uint32(binary.BigEndian.Uint32(r.data[r.offset : r.offset+4]))
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r.offset += 4
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return i
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}
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func (r *xdr) getHyper() int64 {
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i := int64(binary.BigEndian.Uint64(r.data[r.offset : r.offset+8]))
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r.offset += 8
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return i
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}
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func (r *xdr) getUHyper() uint64 {
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i := uint64(binary.BigEndian.Uint64(r.data[r.offset : r.offset+8]))
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r.offset += 8
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return i
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}
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func (r *xdr) getString() string {
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return string(r.getDynamicOpaque())
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}
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func (r *xdr) getOpaque(length uint32) []byte {
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padding := (4 - (length & 3)) & 3
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b := r.data[r.offset : r.offset+length]
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r.offset += length + padding
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return b
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}
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func (r *xdr) getDynamicOpaque() []byte {
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l := r.getUInt()
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return r.getOpaque(l)
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}
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func (r *xdr) getUIntVector() []uint32 {
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l := r.getUInt()
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v := make([]uint32, int(l))
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for i := 0; i < len(v); i++ {
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v[i] = r.getUInt()
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}
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return v
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}
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