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45 lines
813 B
45 lines
813 B
// Addr / Via Parameter Library
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package sip
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import (
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"bytes"
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"strings"
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)
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// XHeader is a linked list storing an unrecognized SIP headers.
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type XHeader struct {
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Name string // tokenc
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Value []byte // UTF8, never nil
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Next *XHeader
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}
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// Get returns an entry in O(n) time.
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func (h *XHeader) Get(name string) *XHeader {
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if h == nil {
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return nil
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}
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if strings.EqualFold(h.Name, name) {
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return h
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}
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return h.Next.Get(name)
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}
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// String turns XHeader into a string.
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func (h *XHeader) String() string {
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var b bytes.Buffer
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h.Append(&b)
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return b.String()
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}
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// Append serializes headers in insertion order.
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func (h *XHeader) Append(b *bytes.Buffer) {
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if h == nil {
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return
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}
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h.Next.Append(b)
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appendSanitized(b, []byte(h.Name), tokenc)
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b.WriteString(": ")
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b.Write(h.Value)
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b.WriteString("\r\n")
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}
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