ref: e686640da8441d0cae0e45d5d6ef9f96c45a8e24
dir: /mbld/fsel.myr/
use std use "opts.use" pkg bld = type syssel(@a) = struct sysattrs : std.htab(byte[:], bool)# _match : std.htab(byte[:], int)# _best : std.htab(byte[:], @a)# ;; const mkfsel : (-> syssel(byte[:])#) const fseladd : (fsel : syssel(byte[:])#, file : byte[:] -> void) const fselfin : (fsel : syssel(byte[:])# -> byte[:][:]) ;; const mkfsel = { var fsel fsel = std.alloc() fsel._match = std.mkht(std.strhash, std.streq) fsel._best = std.mkht(std.strhash, std.streq) fsel.sysattrs = std.mkht(std.strhash, std.streq) addsysattrs(fsel.sysattrs) -> fsel } const fseladd = {fsel, f var basename, attrs var nmatch, curbest var attrlist match std.strfind(f, "+") | `std.Some i: basename = f[:i] match std.strrfind(f[i+1:], ".") | `std.Some j: attrs = f[i+1:][:j] | `std.None: std.fatal(1, "unrecognized type for file %s\n", f) ;; | `std.None: match std.strrfind(f, ".") | `std.None: std.fatal(1, "unrecognized type for file %s\n", f) | `std.Some i: basename = f[:i] attrs = "" ;; ;; nmatch = 0 attrlist = std.strsplit(attrs, "-") for a in attrlist if std.hthas(fsel.sysattrs, a) nmatch++ else nmatch = -1 break ;; ;; std.slfree(attrlist) curbest = std.htgetv(fsel._match, basename, -1) if curbest < nmatch std.htput(fsel._match, basename, nmatch) std.htput(fsel._best, basename, f) ;; } const fselfin = {fsel var keys, nmatch, ret keys = std.htkeys(fsel._match) ret = [][:] for k in keys nmatch = std.htgetv(fsel._match, k, -1) if nmatch == -1 std.fatal(1, "no applicable file for '%s'\n", k) ;; ret = std.slpush(ret, std.htgetv(fsel._best, k, "")) ;; std.htfree(fsel._match) std.htfree(fsel._best) std.htfree(fsel.sysattrs) -> ret } const addsysattrs = {sa var attrs match opt_sys | "freebsd": attrs = ["freebsd", "posixy"][:] | "osx": attrs = ["osx", "posixy"][:] | "linux": attrs = ["linux", "posixy"][:] | "plan9": attrs = ["plan9"][:] | unknown: std.fatal(1, "unknown system \"%s\"\n", unknown) ;; for a in attrs std.htput(sa, a, true) ;; match opt_arch | "x64": attrs = ["x64"][:] | unknown: std.fatal(1, "unknown arch %s\n", unknown) ;; for a in attrs std.htput(sa, a, true) ;; }