-
Notifications
You must be signed in to change notification settings - Fork 4
/
ebcdic.go
48 lines (43 loc) · 1.14 KB
/
ebcdic.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
//
// Package ebcdic provides functions to convert Unicode to EBCDIC and vice-versa.
//
// It uses conversion table data from http://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/EBCDIC/CP037.TXT
//
// Valid codepage bytes for both Unicode and EBCDIC are `0x00` .. `0xFF`
//
// Invalid characters are replaced with `NUL` (`0x00`)
//
// Copyright Mike Hughes 2014 - 2021 (intermernet AT gmail DOT com)
//
package ebcdic
import (
"errors"
)
const charMapLength = 0xFF
var ErrEncode = errors.New("could not encode characters")
// Encode Unicode to EBCDIC.
// Replaces Unicode runes > codepoint FF with NUL.
// If this replacement occurs, it returns ErrEncode.
func Encode(Unicode string) ([]byte, error) {
var (
out []byte
err error
)
for _, v := range Unicode {
if v <= charMapLength { // Unicode <= FF, in valid translation range
out = append(out, ebcdicMap[v])
} else {
out = append(out, 0) // Replace with NUL if out of range
err = ErrEncode
}
}
return out, err
}
// Decode EBCDIC to Unicode.
func Decode(EBCDIC []byte) string {
var out []rune
for _, v := range EBCDIC {
out = append(out, unicodeMap[v])
}
return string(out)
}