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print.go
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print.go
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package prettyprint
import (
"fmt"
"strings"
)
func binaryHex(data []byte, lineBytes int, indent string) string {
totalLines := (len(data) + lineBytes - 1) / lineBytes
lines := make([]string, 0, totalLines)
lineBuffer := make([]string, 0, 100)
for i := 0; i < len(data); i += 1 {
lastByte := ":"
if i+1 == len(data) {
lastByte = ""
}
lineBuffer = append(lineBuffer,
fmt.Sprintf("%02x%s", data[i], lastByte))
if len(lineBuffer) == lineBytes || len(data) == i+1 {
lines = append(lines, indent+strings.Join(lineBuffer, ""))
lineBuffer = make([]string, 0, 100)
}
}
return strings.Join(lines, "\n")
}
func binaryConcat(values ...[]byte) []byte {
length := 0
for _, value := range values {
length += len(value)
}
result := make([]byte, 0, length)
for _, value := range values {
result = append(result, value...)
}
return result
}
func PrintBinary(name string, value []byte) {
fmt.Printf("%s: [%d bytes]\n%s\n",
name, len(value), binaryHex(value, 15, " "))
}
func PrintBinaryWithIndent(name string, indent string, value []byte) {
fmt.Printf("%s: [%d bytes]\n%s\n",
indent+name, len(value), binaryHex(value, 15, indent+" "))
}
func PrintBinariesWithIndent(name string, indent string, values ...[]byte) {
data := binaryConcat(values...)
fmt.Printf("%s: [%d bytes]\n%s\n",
indent+name, len(data), binaryHex(data, 15, indent+" "))
}
func PrintBinaries(name string, values ...[]byte) {
PrintBinary(name, binaryConcat(values...))
}
// PPrintBinary print value make sure it is positive
func PPrintBinary(name string, value []byte) {
if len(value) == 0 {
fmt.Printf("%s: [empty]\n", name)
return
}
length := len(value)
padded := ""
first := value[0]
if first > 0x80 {
value = append([]byte{0x00}, value...)
padded = " (padded)"
}
fmt.Printf("%s: [%d bytes%s]\n%s\n",
name, length, padded, binaryHex(value, 15, " "))
}