emitter

Documentation

Overview

Package emitter emits the translated trice strings.

Example (NewColorDisplay)

p := newColorDisplay(os.Stdout, "none")
l1 := []string{"msg:This is ", "the 1st ", "line"}
l2 := []string{"MSG:This is ", "the 2nd ", "line"}
p.WriteLine(l1)
p.WriteLine(l2)

Output:

This is the 1st line
MSG:This is the 2nd line

Example (NewLocalDisplay)

p := newLocalDisplay(os.Stdout)
l1 := []string{"This is ", "the 1st ", "line"}
l2 := []string{"This is ", "the 2nd ", "line"}
p.WriteLine(l1)
p.WriteLine(l2)

Output:

This is the 1st line
This is the 2nd line

Index

• Constants
• Variables
• func BanOrPickFilter(b []byte) (n int)
• func ColorChannelEvents(ch string) int
• func PrintColorChannelEvents(w io.Writer)
• func ScDisplayServer(w io.Writer) error
• func ScShutdownRemoteDisplayServer(w io.Writer, timeStamp int64, args ...string) error
• func ShowAllColors()
• type DisplayServer
  • func (p *DisplayServer) ColorPalette(s []string, reply *int64) error
  • func (p *DisplayServer) LogSetFlags(f []int64, r *int64) error
  • func (p *DisplayServer) Shutdown(ts []int64, _ *int64) error
  • func (p *DisplayServer) WriteLine(line []string, reply *int64) error
• type LineWriter
• type TriceLineComposer
  • func New(w io.Writer) *TriceLineComposer
  • func (p *TriceLineComposer) Write(b []byte) (n int, err error)
  • func (p *TriceLineComposer) WriteString(s string) (n int, err error)

Examples

• Package (NewColorDisplay)
• Package (NewLocalDisplay)

Constants

const SyncPacketPattern = "inf:[TRICE_SYNC_PACKET 0x89abcdef]"

SyncPacketPattern is used if a sync packet arrives

Variables

var (
	// Verbose gives more information on output if set. The value is injected from main packages.
	Verbose bool

	// HostStamp is used tor line timestamps.
	// off = no timestamp
	// none = no timestamp
	// LOCmicro = local time with microseconds
	// UTCmicro = universal time with microseconds
	// zero = fixed "2006-01-02_1504-05" timestamp (for tests)
	HostStamp string

	// Prefix starts lines. It follows line timestamp, if any.
	Prefix string

	// Suffix lollows lines. Usually empty.
	Suffix string

	// ColorPalette determines the way color is handled.
	// off = no color handling at all. Lower case color prefixes are not removed. Use with care.
	// none = no colors. Lower case color prefixes are removed.
	// default = color codes added (TODO: change to ANSI)
	ColorPalette string

	// IPAddr ist the remote display IP address.
	IPAddr string

	// IPPort ist the remote display port number.
	IPPort string

	// DisplayRemote if set, sends trice lines over TCP.
	DisplayRemote bool

	// TestTableMode is set externally to avoid Prefix overwrite
	TestTableMode bool

	// NextLine is set true as help for decoder.TestTableMode, where it is clreared at line start.
	NextLine bool

	// Ban is a string slice containing all channel descriptors to suppress
	Ban channelArrayFlag

	// Pick is a string slice containing all channel descriptors only to display
	Pick channelArrayFlag
)

var (
	// LogLevel is usable to suppress less important logs.
	LogLevel = "all"
)

Functions

func BanOrPickFilter

func BanOrPickFilter(b []byte) (n int)

BanOrPickFilter returns len of b if b ist not filtered out, otherwise 0. If Ban and Pick are nil nothing is filtered out. If Ban and Pick are both not nil this is a fatal error (os.Exit). If b starts with a known channel specifier existent in Ban 0, is returned. If b starts with a known channel specifier existent in Pick len of b, is returned.

func ColorChannelEvents

func ColorChannelEvents(ch string) int

ColorChannelEvents returns count of occurred channel events. If ch is unknown, the returned value is -1.

func PrintColorChannelEvents

func PrintColorChannelEvents(w io.Writer)

PrintColorChannelEvents shows the amount of occurred channel events.

func ScDisplayServer

func ScDisplayServer(w io.Writer) error

ScDisplayServer is the endless function called when trice tool acts as remote display. All in Server struct registered RPC functions are reachable, when displayServer runs.

func ScShutdownRemoteDisplayServer

func ScShutdownRemoteDisplayServer(w io.Writer, timeStamp int64, args ...string) error

ScShutdownRemoteDisplayServer connects to a client to send shutdown message to display server. 0==timeStamp -> no timestamp in shutdown message, use for tests. 1==timeStamp -> timestamp in shutdown message, use normally. It accepts 0 to 2 string arguments as args. More arguments are ignored. For not given parameters default values are taken. The parameters are in the following order. args[0] (ipa) is the IP address to be used to connect to the remote display. args[1] (ipp) is the IP port to be used to connect to the remote display.

func ShowAllColors

func ShowAllColors()

Types

type DisplayServer

type DisplayServer struct {
	Display colorDisplay // todo: lineWriter?
}

DisplayServer is the RPC struct for registered DisplayServer functions. Its methods must be exported.

func (*DisplayServer) ColorPalette

func (p *DisplayServer) ColorPalette(s []string, reply *int64) error

ColorPalette is the exported server function for color palette, if trice tool acts as display server. By declaring it as a Server struct method it is registered as RPC destination.

func (*DisplayServer) LogSetFlags

func (p *DisplayServer) LogSetFlags(f []int64, r *int64) error

LogSetFlags is called remotely to ...

func (*DisplayServer) Shutdown

func (p *DisplayServer) Shutdown(ts []int64, _ *int64) error

Shutdown is called remotely to shut down display server

func (*DisplayServer) WriteLine

func (p *DisplayServer) WriteLine(line []string, reply *int64) error

WriteLine is the exported server method for string display, if trice tool acts as display server. By declaring it as a Server struct method it is registered as RPC destination.

type LineWriter

type LineWriter interface {
	WriteLine([]string)
}

LineWriter is the common interface for output devices. The string slice `line` contains all string parts of one line including prefix and suffix. The last string part is without newline char and must be handled by the output device.

type TriceLineComposer

type TriceLineComposer struct {
	Line []string // line collector
	// contains filtered or unexported fields
}

TriceLineComposer collects all partial strings forming one line.

func New

func New(w io.Writer) *TriceLineComposer

New creates the emitter instance and returns a string writer to be used for emitting.

func (*TriceLineComposer) Write

func (p *TriceLineComposer) Write(b []byte) (n int, err error)

Write treats received buffer as a string.

func (*TriceLineComposer) WriteString

func (p *TriceLineComposer) WriteString(s string) (n int, err error)

WriteString implements the io.StringWriter interface. The triceLineComposer can use it. WriteString uses the internal line writer p.lw for writing out full lines. If s is empty, WriteString returns 0, nil. If p.line is empty, the actual timestamp and the prefix are added to p.line. If s is without newline it is added to p.line and WriteString returns. If s ends with newline it is added to p.line and also the suffix is added to p.line and pline is written to p.lw. If s contains several newlines it is split there and the substrings are handled accordingly. That means it writes internally a separate line for each substring (in s) ending with a newline.