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47 lines
1.0 KiB
47 lines
1.0 KiB
3 years ago
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package jx
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import (
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"github.com/go-faster/errors"
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"github.com/segmentio/asm/base64"
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)
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// Base64 decodes base64 encoded data from string.
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//
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// Same as encoding/json, base64.StdEncoding or RFC 4648.
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func (d *Decoder) Base64() ([]byte, error) {
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if d.Next() == Null {
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if err := d.Null(); err != nil {
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return nil, errors.Wrap(err, "read null")
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}
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return nil, nil
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}
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return d.Base64Append([]byte{})
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}
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// Base64Append appends base64 encoded data from string.
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//
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// Same as encoding/json, base64.StdEncoding or RFC 4648.
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func (d *Decoder) Base64Append(b []byte) ([]byte, error) {
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if d.Next() == Null {
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if err := d.Null(); err != nil {
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return nil, errors.Wrap(err, "read null")
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}
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return b, nil
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}
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buf, err := d.StrBytes()
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if err != nil {
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return nil, errors.Wrap(err, "bytes")
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}
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decodedLen := base64.StdEncoding.DecodedLen(len(buf))
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start := len(b)
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b = append(b, make([]byte, decodedLen)...)
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n, err := base64.StdEncoding.Decode(b[start:], buf)
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if err != nil {
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return nil, errors.Wrap(err, "decode")
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}
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return b[:start+n], nil
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}
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