Add freq and histogram. Use getopt.

hd.go

@@ -1,78 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"fmt"
-	"os"
-	"io"
-)
-
-const charset = "" +
-	"·☺☻♥♦♣♠•◘○◙♂♀♪♫☼" +
-	"►◄↕‼¶§▬↨↑↓→←∟↔▲▼" +
-	" !\"#$%&'()*+,-./" +
-	"0123456789:;<=>?" +
-	"@ABCDEFGHIJKLMNO" +
-	"PQRSTUVWXYZ[\\]^_" +
-	"`abcdefghijklmno" +
-	"pqrstuvwxyz{|}~⌂" +
-
-	"ÇüéâäàåçêëèïîìÄÅ" +
-	"ÉæÆôöòûùÿÖÜ¢£¥€ƒ" +
-	"áíóúñѪº½⅓¼⅕⅙⅛«»" +
-	"░▒▓│┤╡╢╖╕╣║╗╝╜╛┐" +
-	"└┴┬├─┼╞╟╚╔╩╦╠═╬╧" +
-	"╨╤╥╙╘╒╓╫╪┘┌█▄▌▐▀" +
-	"αßΓπΣσµτΦΘΩδ∞φε∩" +
-	"⁰¹²³⁴⁵⁶⁷⁸⁹ⁱⁿ⁽⁼⁾¤"
-
-func main() {
-	offset := 0
-	b := make([]byte, 16)
-	lb := make([]byte, 16)
-	chars := []rune(charset)
-	skipping := false
-
-	for ;; {
-		n, err := os.Stdin.Read(b)
-		if err != nil {
-			if err != io.EOF {
-				fmt.Println("read failed:", err)
-			}
-			break
-		}
-		
-		if (offset > 0) && (bytes.Equal(lb, b)) {
-			if ! skipping {
-				fmt.Println("*")
-			}
-			offset += n
-			skipping = true
-			continue
-		}
-		copy(lb, b)
-		skipping = false
-		
-		fmt.Printf("%08x ", offset)
-		offset += n
-		
-		for i := 0; i < 16; i += 1 {
-			if i % 8 == 0 {
-				fmt.Printf("  ")
-			}
-			if i < n {
-				fmt.Printf("%02x ", b[i])
-			} else {
-				fmt.Printf("   ")
-			}
-		}
-		
-		fmt.Printf("ǀ")
-		for i := 0; i < n; i += 1 {
-			fmt.Printf("%c", chars[b[i]])
-		}
-		fmt.Printf("ǀ\n")
-	}
-	
-	fmt.Printf("%08x\n", offset)
-}

pcap.go

@@ -1,125 +0,0 @@
-package main
-//package pcap
-
-import (
-	"time"
-	"os"
-	"fmt"
-	"io"
-	"encoding/binary"
-)
-
-const MAXFRAME = 9000
-const MAGIC_BE = "\xa1\xb2\xc3\xd4"
-const MAGIC_LE = "\xd4\xc3\xb2\xa1"
-
-const LINKTYPE_ETHERNET = 1
-const LINKTYPE_RAW = 101
-
-type FileHeader struct {
-	VersionMajor uint16
-	VersionMinor uint16
-	ThisZone int32
-	SigFigs uint32
-	SnapLen uint32
-	LinkType uint32
-}
-
-type PcapFile struct {
-	order binary.ByteOrder
-	header FileHeader
-}
-
-type FrameHeader struct {
-	Sec uint32
-	Usec uint32
-	Caplen uint32
-	Framelen uint32
-}
-
-func (h *FrameHeader) Time() time.Time {
-	return time.Unix(int64(h.Sec), int64(h.Usec) * 1000)
-}
-
-type Frame struct {
-	FrameHeader
-	payload []byte
-}
-
-type Reader struct {
-	PcapFile
-	r io.Reader
-}
-
-type Writer struct {
-	PcapFile
-	w io.Writer
-}
-
-func NewReader(r io.Reader) (*Reader, error) {
-	var h FileHeader
-	var order binary.ByteOrder
-	magic := make([]byte, 4)
-
-	if err := r.Read(&magic); err != nil {
-		return nil, err
-	}
-	switch (magic) {
-	case MAGIC_BE:
-		order = binary.BigEndian
-	case MAGIC_LE:
-		order = binary.LittleEndian
-	default:
-		return nil, fmt.Errorf("Cannot determine endianness")
-	}
-	
-
-	if err := binary.Read(r, order, &h); err != nil {
-		return nil, err
-	}
-
-	ret := &Reader{PcapFile{order, h}, r}
-
-	return ret, nil
-}
-
-func (r *Reader) Read() (*Frame, error) {
-	var h FrameHeader
-
-	if err := binary.Read(r.r, r.order, &h); err != nil {
-		return nil, err
-	}
-
-	payload := make([]byte, h.Caplen)
-	l, err := r.r.Read(payload)
-	if err != nil {
-		return nil, err
-	}
-	if uint32(l) < h.Caplen {
-		return nil, fmt.Errorf("Short read: %d (wanted %d)", l, h.Caplen)
-	}
-
-	ret := &Frame{h, payload}
-	return ret, nil
-}
-
-func main() {
-	r, err := NewReader(os.Stdin)
-	if err != nil {
-		panic(err)
-	}
-
-	fmt.Println(r.order, r.header)
-
-	for ;; {
-		frame, err := r.Read()
-		if err != nil {
-			panic(err)
-		}
-		if frame == nil {
-			break
-		}
-		fmt.Println("hi")
-		fmt.Println(frame)
-	}
-}