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impl. the recent changes from the reflect package

This commit is contained in:
Miek Gieben 2011-08-08 09:49:25 +02:00
parent a3bd25fad3
commit d6716f693d
1 changed files with 38 additions and 45 deletions
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83
msg.go
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@ -360,51 +360,44 @@ func packStructValue(val reflect.Value, msg []byte, off int) (off1 int, ok bool)
}
case reflect.Struct:
off, ok = packStructValue(fv, msg, off)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
i := fv.Uint()
switch fv.Type().Kind() {
default:
//fmt.Fprintf(os.Stderr, "dns: unknown packing type %v\n", f.Type)
return len(msg), false
case reflect.Uint8:
if off+1 > len(msg) {
//fmt.Fprintf(os.Stderr, "dns: overflow packing uint8")
return len(msg), false
}
msg[off] = byte(i)
off++
case reflect.Uint16:
if off+2 > len(msg) {
//fmt.Fprintf(os.Stderr, "dns: overflow packing uint16")
return len(msg), false
}
msg[off] = byte(i >> 8)
msg[off+1] = byte(i)
off += 2
case reflect.Uint32:
if off+4 > len(msg) {
//fmt.Fprintf(os.Stderr, "dns: overflow packing uint32")
return len(msg), false
}
msg[off] = byte(i >> 24)
msg[off+1] = byte(i >> 16)
msg[off+2] = byte(i >> 8)
msg[off+3] = byte(i)
off += 4
case reflect.Uint64:
// Only used in TSIG, where it stops at 48 bits, so we discard the upper 16
if off+6 > len(msg) {
//fmt.Fprintf(os.Stderr, "dns: overflow packing uint64")
return len(msg), false
}
msg[off] = byte(i >> 40)
msg[off+1] = byte(i >> 32)
msg[off+2] = byte(i >> 24)
msg[off+3] = byte(i >> 16)
msg[off+4] = byte(i >> 8)
msg[off+5] = byte(i)
off += 6
}
case reflect.Uint8:
if off+1 > len(msg) {
//fmt.Fprintf(os.Stderr, "dns: overflow packing uint8")
return len(msg), false
}
msg[off] = byte(i)
off++
case reflect.Uint16:
if off+2 > len(msg) {
//fmt.Fprintf(os.Stderr, "dns: overflow packing uint16")
return len(msg), false
}
msg[off] = byte(i >> 8)
msg[off+1] = byte(i)
off += 2
case reflect.Uint32:
if off+4 > len(msg) {
//fmt.Fprintf(os.Stderr, "dns: overflow packing uint32")
return len(msg), false
}
msg[off] = byte(i >> 24)
msg[off+1] = byte(i >> 16)
msg[off+2] = byte(i >> 8)
msg[off+3] = byte(i)
off += 4
case reflect.Uint64:
// Only used in TSIG, where it stops at 48 bits, so we discard the upper 16
if off+6 > len(msg) {
//fmt.Fprintf(os.Stderr, "dns: overflow packing uint64")
return len(msg), false
}
msg[off] = byte(i >> 40)
msg[off+1] = byte(i >> 32)
msg[off+2] = byte(i >> 24)
msg[off+3] = byte(i >> 16)
msg[off+4] = byte(i >> 8)
msg[off+5] = byte(i)
off += 6
case reflect.String:
// There are multiple string encodings.
// The tag distinguishes ordinary strings from domain names.