71 lines
1.4 KiB
Go
71 lines
1.4 KiB
Go
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package devicepath
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import (
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"encoding/binary"
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"errors"
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"fmt"
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"strconv"
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"strings"
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)
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const (
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pciLength uint16 = 6
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pciPrefix string = "Pci"
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pciStringLength int = 12
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)
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type PCIDevicePath struct {
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function uint8
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device uint8
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}
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func (pcp *PCIDevicePath) Type() DeviceNodeType {
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return HardwareDevicePath
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}
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func (pcp *PCIDevicePath) SubType() DeviceNodeSubType {
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return PCIHardware
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}
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func (pcp *PCIDevicePath) Bytes() []byte {
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res := make([]byte, pciLength)
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res[0] = byte(pcp.Type())
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res[1] = byte(pcp.SubType())
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binary.LittleEndian.PutUint16(res[2:3], pciLength)
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res[4] = pcp.function
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res[5] = pcp.device
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return res
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}
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func (pcp *PCIDevicePath) String() string {
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return fmt.Sprintf("%s(0x%x,0x%x)", pciPrefix, pcp.function, pcp.device)
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}
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func (pcp *PCIDevicePath) ParseString(raw string) error {
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if !checkStringFormat(raw, pciPrefix, pciStringLength) {
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return ErrMalformedString
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}
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args := strings.Split(raw[len(pciPrefix)+1:pciStringLength-1], ",")
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if len(args) != 2 {
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return errors.New("unexpected number of arguments")
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}
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if function, err := strconv.ParseUint(args[0], 0, 8); err != nil {
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return err
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} else {
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pcp.function = uint8(function)
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}
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if device, err := strconv.ParseUint(args[1], 0, 8); err != nil {
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return err
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} else {
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pcp.device = uint8(device)
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}
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return nil
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}
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func NewPCIDevicePath(function, device uint8) *PCIDevicePath {
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return &PCIDevicePath{
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function: function,
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device: device,
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}
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}
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