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codereader.go
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/
codereader.go
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package vm
import (
//"io"
"bytes"
"encoding/binary"
)
type codeReader struct {
buffer *bytes.Reader
}
func NewCodeReader(data []byte) *codeReader {
cr := new(codeReader)
cr.buffer = bytes.NewReader(data)
return cr
}
func (cr *codeReader) setPos(pos int64) {
cr.buffer.Seek(pos, 0)
}
func (cr *codeReader) readString(size uint32) (*string, error) {
var b []byte = make([]byte, size)
_, err := cr.buffer.Read(b)
if err != nil {
return nil, err
}
str := string(b)
return &str, nil
}
func (cr *codeReader) readByte() (byte, error) {
var res byte
err := binary.Read(cr.buffer, binary.LittleEndian, &res)
return res, err
}
func (cr *codeReader) readWord() (uint16, error) {
var res uint16
err := binary.Read(cr.buffer, binary.LittleEndian, &res)
return res, err
}
func (cr *codeReader) readDWord() (uint32, error) {
var res uint32
err := binary.Read(cr.buffer, binary.LittleEndian, &res)
return res, err
}