Added bytecount

Author: fileformat

.gitignore

@@ -1,12 +1,14 @@
 *~
 **/*#
+boo
 .cache
 *.class
 crash.log
 _data/build.json
 dist
 .DS_Store
 .env
+foo
 Gemfile.lock
 .idea/
 .jekyll-metadata

README.md

@@ -11,7 +11,7 @@
 
 - [x] `asciify`: converts to ASCII using [anyascii](https://github.com/anyascii/anyascii)
 - [x] `asciitable`: prints out an table of ASCII characters
-- [ ] `bytecount`: counts the number of occurrences of each byte
+- [x] `bytecount`: counts the number of occurrences of each byte
 - [x] `certinfo`: print info about an x509 (aka SSL/HTTPS) certificate
 - [ ] `ghash`: calculate various [hashes available in the Go standard library](https://pkg.go.dev/crypto#Hash)
 - [x] `hexdumpc`: generate canonical hexdump (`hexdump -C`) output in case you don't have [`hexdump`](https://man7.org/linux/man-pages/man1/hexdump.1.html) installed

cmd/asciitable/asciitable.go

@@ -42,12 +42,12 @@ func main() {
 
 	header := []string{""}
 	for i := 0; i <= 0xf0; i += 0x10 {
-		header = append(header, fmt.Sprintf("0x%x", i))
+		header = append(header, fmt.Sprintf("0x%02X", i))
 	}
 	table.Header(header)
 
 	for row := 0; row <= 0x0F; row += 0x01 {
-		data := []string{fmt.Sprintf("0x%02x", row)}
+		data := []string{fmt.Sprintf("0x%02X", row)}
 		for col := 0; col <= 0xF0; col += 0x10 {
 			i := row + col
 			if i < 0x20 || i == 0x7F {

cmd/bytecount/bytecount.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/olekukonko/tablewriter"
+	"github.com/olekukonko/tablewriter/renderer"
+	"github.com/olekukonko/tablewriter/tw"
+	"golang.org/x/text/language"
+	"golang.org/x/text/message"
+)
+
+func outputPretty(out io.Writer, counts map[byte]int) {
+
+	prettyPrinter := message.NewPrinter(language.English)
+	// LATER: option to output markdown or pure ASCII (i.e. not using box-drawing characters)
+	table := tablewriter.NewTable(out,
+		tablewriter.WithRenderer(renderer.NewBlueprint(tw.Rendition{
+			Symbols: tw.NewSymbols(tw.StyleRounded),
+		})),
+		tablewriter.WithConfig(tablewriter.Config{
+			Header: tw.CellConfig{
+				Formatting: tw.CellFormatting{AutoFormat: tw.Off},
+				Alignment:  tw.CellAlignment{Global: tw.AlignCenter},
+			},
+			Row: tw.CellConfig{Alignment: tw.CellAlignment{Global: tw.AlignRight}},
+		}),
+	)
+
+	header := []string{""}
+	for i := 0; i <= 0xf0; i += 0x10 {
+		header = append(header, fmt.Sprintf("0x%02X", i))
+	}
+	table.Header(header)
+
+	for row := 0; row <= 0x0F; row += 0x01 {
+		data := []string{fmt.Sprintf("0x%02X", row)}
+		for col := 0; col <= 0xF0; col += 0x10 {
+			i := row + col
+			data = append(data, prettyPrinter.Sprintf("%d", counts[byte(i)]))
+		}
+		table.Append(data)
+	}
+
+	table.Render()
+
+}
+
+func main() {
+	counts := make(map[byte]int)
+	for i := 0; i < 256; i++ {
+		counts[byte(i)] = 0
+	}
+
+	reader := bufio.NewReader(os.Stdin)
+	for {
+		b, err := reader.ReadByte()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "ERROR: unable to read input: %v\n", err)
+			os.Exit(1)
+		}
+		counts[b]++
+	}
+
+	//LATER: other output formats: plain, JSON, CSV
+	outputPretty(os.Stdout, counts)
+}

run.sh

@@ -7,8 +7,8 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-CMD="${1:-asciify}"
+CMD="${1:-bytecount}"
 
 go build -o "./dist/${CMD}" "./cmd/${CMD}"
 
-./dist/${CMD}
+cat README.md | ./dist/${CMD}