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|
use "alloc"
use "bigint"
use "bitset"
use "fmt"
use "introspect"
use "strbuf"
use "varargs"
use "ipparse"
pkg std =
;;
const __init__ = {
var bigint : bigint#
var bitset : bitset#
var ipaddr : netaddr
bigint = mkbigint(0)
bitset = mkbs()
fmtinstall(typeof(bigint), bigfmt, [][:])
fmtinstall(typeof(bitset), bsfmt, [][:])
fmtinstall(typeof(ipaddr), ipfmt, [][:])
bigfree(bigint)
bsfree(bitset)
}
const bigfmt = {sb, ap, opts
var a, n, buf
a = vanext(ap)
/*
allocate a buffer guaranteed to be big enough.
that's
2 + floor(nbits/(log_2(10)))
or
2 + a.dig.len * 32/3.32...
or
2 + a.dig.len * 10
plus one for the - sign.
*/
buf = slalloc(3 + a.dig.len * 10)
n = bigbfmt(buf, a, 10)
sbputs(sb, buf[:n])
slfree(buf)
}
const bsfmt = {sb, ap, opts
var bs, sep
bs = vanext(ap)
sep = ""
sbputs(sb, "bitset{")
for var i = 0; i < bsmax(bs); i++
if bshas(bs, i)
sbfmt(sb, sep)
sbfmt(sb, "{}", i)
sep = ", "
;;
;;
sbputs(sb, "}")
}
const ipfmt = {sb, ap, opts
var ip : netaddr
var sep = ""
ip = std.vanext(ap)
match ip
| `Ipv4 a:
std.put("{}.{}.{}.{}", a[0], a[1], a[2], a[3])
| `Ipv6 a:
sep = ""
for var i = 0; i < 16; i += 2
std.put("{}{w=2,p=0,x}{w=2,p=0,x}", sep, a[i+0], a[i+1])
sep = ":"
;;
;;
}
|
