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use "alloc.use"
use "bigint.use"
use "bitset.use"
use "fmt.use"
use "introspect.use"
use "strbuf.use"
use "varargs.use"
pkg std =
;;
const __init__ = {
var bigint : bigint#
var bitset : bitset#
fmtinstall(typeof(bigint), bigfmt, [][:])
fmtinstall(typeof(bitset), bsfmt, [][:])
}
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, "}")
}
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