78 lines
1.3 KiB
Go
78 lines
1.3 KiB
Go
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package regname
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import (
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"sourcecode.social/reiver/go-rfc2396/escaped"
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"sourcecode.social/reiver/go-rfc2396/unreserved"
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)
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// Bytes returns the 'reg_name', as defined by IETF RFC-2396.
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//
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// reg_name = 1*( unreserved | escaped | "$" | "," | ";" | ":" | "@" | "&" | "=" | "+" )
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func Bytes(p []byte) (regName []byte, rest []byte, ok bool) {
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var length int = len(p)
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if length <= 0 {
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return nil, p, false
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}
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// Make sure there is at least one valid "character".
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{
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p0 := p[0]
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switch p0 {
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case '%':
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_, _, ok := escaped.Bytes(p)
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if !ok {
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return nil, p, false
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}
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// Nothingh (else) here.
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case '$' , ',' , ';' , ':' , '@' , '&' , '=' , '+':
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// Nothing here.
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default:
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switch {
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case unreserved.ByteIs(p0):
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// Nothing here.
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default:
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return nil, p, false
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}
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}
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}
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{
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var skip uint
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for i,b := range p {
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if 0 < skip {
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skip--
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continue
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}
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switch b {
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case '%':
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_, _, ok := escaped.Bytes(p[i:])
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if !ok {
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return p[:i], p[i:], true
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}
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skip = 2
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// Nothingh (else) here.
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case '$' , ',' , ';' , ':' , '@' , '&' , '=' , '+':
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// Nothing here.
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default:
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switch {
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case unreserved.ByteIs(b):
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// Nothing here.
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default:
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return p[:i], p[i:], true
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}
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}
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}
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return p, nil, true
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}
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}
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