go-exif/v2/common/utility.go

package exifcommon

import (
    "bytes"
    "fmt"

    "github.com/dsoprea/go-logging"
)

// DumpBytes prints a list of hex-encoded bytes.
func DumpBytes(data []byte) {
    fmt.Printf("DUMP: ")
    for _, x := range data {
        fmt.Printf("%02x ", x)
    }

    fmt.Printf("\n")
}

// DumpBytesClause prints a list like DumpBytes(), but encapsulated in
// "[]byte { ... }".
func DumpBytesClause(data []byte) {
    fmt.Printf("DUMP: ")

    fmt.Printf("[]byte { ")

    for i, x := range data {
        fmt.Printf("0x%02x", x)

        if i < len(data)-1 {
            fmt.Printf(", ")
        }
    }

    fmt.Printf(" }\n")
}

// DumpBytesToString returns a stringified list of hex-encoded bytes.
func DumpBytesToString(data []byte) string {
    b := new(bytes.Buffer)

    for i, x := range data {
        _, err := b.WriteString(fmt.Sprintf("%02x", x))
        log.PanicIf(err)

        if i < len(data)-1 {
            _, err := b.WriteRune(' ')
            log.PanicIf(err)
        }
    }

    return b.String()
}

// DumpBytesClauseToString returns a comma-separated list of hex-encoded bytes.
func DumpBytesClauseToString(data []byte) string {
    b := new(bytes.Buffer)

    for i, x := range data {
        _, err := b.WriteString(fmt.Sprintf("0x%02x", x))
        log.PanicIf(err)

        if i < len(data)-1 {
            _, err := b.WriteString(", ")
            log.PanicIf(err)
        }
    }

    return b.String()
}