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mirror of https://github.com/wader/fq.git synced 2024-12-24 22:05:31 +03:00
fq/format/text/encoding.go
Mattias Wadman cae288e6be format,intepr: Refactor json, yaml, etc into formats also move out related functions
json, yaml, toml, xml, html, csv are now normal formats and most of them also particiate
in probing (not html and csv).

Also fixes a bunch of bugs in to/fromxml, to/fromjq etc.
2022-07-23 21:48:45 +02:00

243 lines
5.7 KiB
Go

package text
import (
"bytes"
"embed"
"encoding/base64"
"encoding/hex"
"fmt"
"io"
"strings"
"github.com/wader/fq/pkg/bitio"
"github.com/wader/fq/pkg/interp"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/charmap"
"golang.org/x/text/encoding/unicode"
)
//go:embed encoding.jq
var textFS embed.FS
func init() {
interp.RegisterFunc0("fromhex", func(_ *interp.Interp, c string) any {
b, err := hex.DecodeString(c)
if err != nil {
return err
}
bb, err := interp.NewBinaryFromBitReader(bitio.NewBitReader(b, -1), 8, 0)
if err != nil {
return err
}
return bb
})
interp.RegisterFunc0("tohex", func(_ *interp.Interp, c string) any {
br, err := interp.ToBitReader(c)
if err != nil {
return err
}
buf := &bytes.Buffer{}
if _, err := io.Copy(hex.NewEncoder(buf), bitio.NewIOReader(br)); err != nil {
return err
}
return buf.String()
})
// TODO: other encodings and share?
base64Encoding := func(enc string) *base64.Encoding {
switch enc {
case "url":
return base64.URLEncoding
case "rawstd":
return base64.RawStdEncoding
case "rawurl":
return base64.RawURLEncoding
default:
return base64.StdEncoding
}
}
type fromBase64Opts struct {
Encoding string
}
interp.RegisterFunc1("_frombase64", func(_ *interp.Interp, c string, opts fromBase64Opts) any {
b, err := base64Encoding(opts.Encoding).DecodeString(c)
if err != nil {
return err
}
bin, err := interp.NewBinaryFromBitReader(bitio.NewBitReader(b, -1), 8, 0)
if err != nil {
return err
}
return bin
})
type toBase64Opts struct {
Encoding string
}
interp.RegisterFunc1("_tobase64", func(_ *interp.Interp, c string, opts toBase64Opts) any {
br, err := interp.ToBitReader(c)
if err != nil {
return err
}
bb := &bytes.Buffer{}
wc := base64.NewEncoder(base64Encoding(opts.Encoding), bb)
if _, err := io.Copy(wc, bitio.NewIOReader(br)); err != nil {
return err
}
wc.Close()
return bb.String()
})
strEncoding := func(s string) encoding.Encoding {
switch s {
case "UTF8":
return unicode.UTF8
case "UTF16":
return unicode.UTF16(unicode.LittleEndian, unicode.UseBOM)
case "UTF16LE":
return unicode.UTF16(unicode.LittleEndian, unicode.IgnoreBOM)
case "UTF16BE":
return unicode.UTF16(unicode.BigEndian, unicode.IgnoreBOM)
case "CodePage037":
return charmap.CodePage037
case "CodePage437":
return charmap.CodePage437
case "CodePage850":
return charmap.CodePage850
case "CodePage852":
return charmap.CodePage852
case "CodePage855":
return charmap.CodePage855
case "CodePage858":
return charmap.CodePage858
case "CodePage860":
return charmap.CodePage860
case "CodePage862":
return charmap.CodePage862
case "CodePage863":
return charmap.CodePage863
case "CodePage865":
return charmap.CodePage865
case "CodePage866":
return charmap.CodePage866
case "CodePage1047":
return charmap.CodePage1047
case "CodePage1140":
return charmap.CodePage1140
case "ISO8859_1":
return charmap.ISO8859_1
case "ISO8859_2":
return charmap.ISO8859_2
case "ISO8859_3":
return charmap.ISO8859_3
case "ISO8859_4":
return charmap.ISO8859_4
case "ISO8859_5":
return charmap.ISO8859_5
case "ISO8859_6":
return charmap.ISO8859_6
case "ISO8859_6E":
return charmap.ISO8859_6E
case "ISO8859_6I":
return charmap.ISO8859_6I
case "ISO8859_7":
return charmap.ISO8859_7
case "ISO8859_8":
return charmap.ISO8859_8
case "ISO8859_8E":
return charmap.ISO8859_8E
case "ISO8859_8I":
return charmap.ISO8859_8I
case "ISO8859_9":
return charmap.ISO8859_9
case "ISO8859_10":
return charmap.ISO8859_10
case "ISO8859_13":
return charmap.ISO8859_13
case "ISO8859_14":
return charmap.ISO8859_14
case "ISO8859_15":
return charmap.ISO8859_15
case "ISO8859_16":
return charmap.ISO8859_16
case "KOI8R":
return charmap.KOI8R
case "KOI8U":
return charmap.KOI8U
case "Macintosh":
return charmap.Macintosh
case "MacintoshCyrillic":
return charmap.MacintoshCyrillic
case "Windows874":
return charmap.Windows874
case "Windows1250":
return charmap.Windows1250
case "Windows1251":
return charmap.Windows1251
case "Windows1252":
return charmap.Windows1252
case "Windows1253":
return charmap.Windows1253
case "Windows1254":
return charmap.Windows1254
case "Windows1255":
return charmap.Windows1255
case "Windows1256":
return charmap.Windows1256
case "Windows1257":
return charmap.Windows1257
case "Windows1258":
return charmap.Windows1258
case "XUserDefined":
return charmap.XUserDefined
default:
return nil
}
}
type toStrEncodingOpts struct {
Encoding string
}
interp.RegisterFunc1("_tostrencoding", func(_ *interp.Interp, c string, opts toStrEncodingOpts) any {
h := strEncoding(opts.Encoding)
if h == nil {
return fmt.Errorf("unknown string encoding %s", opts.Encoding)
}
bb := &bytes.Buffer{}
if _, err := io.Copy(h.NewEncoder().Writer(bb), strings.NewReader(c)); err != nil {
return err
}
outBR := bitio.NewBitReader(bb.Bytes(), -1)
bin, err := interp.NewBinaryFromBitReader(outBR, 8, 0)
if err != nil {
return err
}
return bin
})
type fromStrEncodingOpts struct {
Encoding string
}
interp.RegisterFunc1("_fromstrencoding", func(_ *interp.Interp, c any, opts fromStrEncodingOpts) any {
inBR, err := interp.ToBitReader(c)
if err != nil {
return err
}
h := strEncoding(opts.Encoding)
if h == nil {
return fmt.Errorf("unknown string encoding %s", opts.Encoding)
}
bb := &bytes.Buffer{}
if _, err := io.Copy(bb, h.NewDecoder().Reader(bitio.NewIOReader(inBR))); err != nil {
return err
}
return bb.String()
})
interp.RegisterFS(textFS)
}