ref: 24a566ff1751b246c8b6efd8adea3447975b9efa
dir: /lib/std/fmtfuncs.myr/
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 = ":" ;; ;; }