wrappers

Documentation

Index

• Constants
• func NewAggregate(errs []error) error
• type Closer
  • func (c *Closer) Add(closer io.Closer)
  • func (c *Closer) Close() error
• type Errs
  • func (errs *Errs) Add(errors ...error)
  • func (errs *Errs) Errored() bool
• type Packer
  • func (p *Packer) CheckSpace(bytes int)
  • func (p *Packer) Expand(bytes int)
  • func (p *Packer) PackBool(b bool)
  • func (p *Packer) PackByte(val byte)
  • func (p *Packer) PackBytes(bytes []byte)
  • func (p *Packer) PackFixedBytes(bytes []byte)
  • func (p *Packer) PackInt(val uint32)
  • func (p *Packer) PackLong(val uint64)
  • func (p *Packer) PackShort(val uint16)
  • func (p *Packer) PackStr(str string)
  • func (p *Packer) UnpackBool() bool
  • func (p *Packer) UnpackByte() byte
  • func (p *Packer) UnpackBytes() []byte
  • func (p *Packer) UnpackFixedBytes(size int) []byte
  • func (p *Packer) UnpackInt() uint32
  • func (p *Packer) UnpackLong() uint64
  • func (p *Packer) UnpackShort() uint16
  • func (p *Packer) UnpackStr() string

Constants

const (
	MaxStringLen = math.MaxUint16

	// ByteLen is the number of bytes per byte...
	ByteLen = 1
	// ShortLen is the number of bytes per short
	ShortLen = 2
	// IntLen is the number of bytes per int
	IntLen = 4
	// LongLen is the number of bytes per long
	LongLen = 8
	// BoolLen is the number of bytes per bool
	BoolLen = 1
	// IPLen is the number of bytes per IP
	IPLen = 16 + ShortLen
)

Functions

func NewAggregate

func NewAggregate(errs []error) error

NewAggregate returns an aggregate error from a list of errors

Types

type Closer

type Closer struct {
	// contains filtered or unexported fields
}

Closer is a nice utility for closing a group of objects while reporting an error if one occurs.

func (*Closer) Add

func (c *Closer) Add(closer io.Closer)

Add a new object to be closed.

func (*Closer) Close

func (c *Closer) Close() error

Close closes each of the closers add to [c] and returns the first error

that occurs or nil if no error occurs.

type Errs

type Errs struct{ Err error }

func (*Errs) Add

func (errs *Errs) Add(errors ...error)

func (*Errs) Errored

func (errs *Errs) Errored() bool

type Packer

type Packer struct {
	Errs

	// The largest allowed size of expanding the byte array
	MaxSize int
	// The current byte array
	Bytes []byte
	// The offset that is being written to in the byte array
	Offset int
}

Packer packs and unpacks a byte array from/to standard values

func (*Packer) CheckSpace

func (p *Packer) CheckSpace(bytes int)

CheckSpace requires that there is at least bytes of write space left in the byte array. If this is not true, an error is added to the packer

func (*Packer) Expand

func (p *Packer) Expand(bytes int)

Expand ensures that there is bytes bytes left of space in the byte slice. If this is not allowed due to the maximum size, an error is added to the packer In order to understand this code, its important to understand the difference between a slice's length and its capacity.

func (*Packer) PackBool

func (p *Packer) PackBool(b bool)

PackBool packs a bool into the byte array

func (*Packer) PackByte

func (p *Packer) PackByte(val byte)

PackByte append a byte to the byte array

func (*Packer) PackBytes

func (p *Packer) PackBytes(bytes []byte)

PackBytes append a byte slice to the byte array

func (*Packer) PackFixedBytes

func (p *Packer) PackFixedBytes(bytes []byte)

PackFixedBytes append a byte slice, with no length descriptor to the byte array

func (*Packer) PackInt

func (p *Packer) PackInt(val uint32)

PackInt append an int to the byte array

func (*Packer) PackLong

func (p *Packer) PackLong(val uint64)

PackLong append a long to the byte array

func (*Packer) PackShort

func (p *Packer) PackShort(val uint16)

PackShort append a short to the byte array

func (*Packer) PackStr

func (p *Packer) PackStr(str string)

PackStr append a string to the byte array

func (*Packer) UnpackBool

func (p *Packer) UnpackBool() bool

UnpackBool unpacks a bool from the byte array

func (*Packer) UnpackByte

func (p *Packer) UnpackByte() byte

UnpackByte unpack a byte from the byte array

func (*Packer) UnpackBytes

func (p *Packer) UnpackBytes() []byte

UnpackBytes unpack a byte slice from the byte array

func (*Packer) UnpackFixedBytes

func (p *Packer) UnpackFixedBytes(size int) []byte

UnpackFixedBytes unpack a byte slice, with no length descriptor from the byte array

func (*Packer) UnpackInt

func (p *Packer) UnpackInt() uint32

UnpackInt unpack an int from the byte array

func (*Packer) UnpackLong

func (p *Packer) UnpackLong() uint64

UnpackLong unpack a long from the byte array

func (*Packer) UnpackShort

func (p *Packer) UnpackShort() uint16

UnpackShort unpack a short from the byte array

func (*Packer) UnpackStr

func (p *Packer) UnpackStr() string

UnpackStr unpacks a string from the byte array