mirror of
https://bitbucket.org/s_l_teichmann/mtsatellite
synced 2024-11-15 23:00:19 +01:00
81 lines
1.5 KiB
Go
81 lines
1.5 KiB
Go
// Copyright 2024 by Sascha L. Teichmann
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// Use of this source code is governed by the MIT license
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// that can be found in the LICENSE file.
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package common
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import (
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"encoding/binary"
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"io"
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)
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type bigEndianReader struct {
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parent io.Reader
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buf [4]byte
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err error
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}
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func (ber *bigEndianReader) u8() (uint8, error) {
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if ber.err != nil {
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return 0, ber.err
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}
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_, err := io.ReadFull(ber.parent, ber.buf[:1])
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if err != nil {
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ber.err = err
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return 0, err
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}
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return ber.buf[0], nil
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}
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func (ber *bigEndianReader) u16() (uint16, error) {
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if ber.err != nil {
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return 0, ber.err
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}
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two := ber.buf[:2]
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_, err := io.ReadFull(ber.parent, two)
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if err != nil {
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ber.err = err
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return 0, err
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}
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return binary.BigEndian.Uint16(two), nil
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}
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func (ber *bigEndianReader) u32() (uint32, error) {
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if ber.err != nil {
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return 0, ber.err
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}
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four := ber.buf[:4]
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_, err := io.ReadFull(ber.parent, four)
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if err != nil {
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ber.err = err
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return 0, err
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}
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return binary.BigEndian.Uint32(four), nil
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}
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func (ber *bigEndianReader) str(n int) (string, error) {
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if ber.err != nil {
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return "", ber.err
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}
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buf := make([]byte, n)
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_, err := io.ReadFull(ber.parent, buf)
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if err != nil {
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ber.err = err
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return "", err
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}
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return string(buf), nil
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}
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func (ber *bigEndianReader) full(n int) ([]byte, error) {
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if ber.err != nil {
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return nil, ber.err
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}
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buf := make([]byte, n)
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_, err := io.ReadFull(ber.parent, buf)
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if err != nil {
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ber.err = err
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return nil, err
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}
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return buf, nil
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}
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