ref: b548687a8ed1d0a159c9d3f3f921d93bbb56908e
dir: /appl/cmd/fs/filter.b/
implement Fsmodule; include "sys.m"; sys: Sys; include "draw.m"; include "sh.m"; include "fslib.m"; fsfilter: Fsfilter; fslib: Fslib; Report, Value, type2s, quit: import fslib; Fschan, Fsdata, Entrychan, Entry, Gatechan, Gatequery, Nilentry, Option, Next, Down, Skip, Quit: import Fslib; Query: adt { gate: Gatechan; dflag: int; reply: chan of int; query: fn(q: self ref Query, d: ref Sys->Dir, name: string, depth: int): int; }; types(): string { return "xpx-d"; } badmod(p: string) { sys->fprint(sys->fildes(2), "fs: size: cannot load %s: %r\n", p); raise "fail:bad module"; } init() { sys = load Sys Sys->PATH; fslib = load Fslib Fslib->PATH; if(fslib == nil) badmod(Fslib->PATH); fsfilter = load Fsfilter Fsfilter->PATH; if(fsfilter == nil) badmod(Fsfilter->PATH); } run(nil: ref Draw->Context, nil: ref Report, opts: list of Option, args: list of ref Value): ref Value { dst := chan of (Fsdata, chan of int); spawn filterproc((hd tl args).x().i, dst, (hd args).p().i, opts != nil); return ref Value.X(dst); } filterproc(src, dst: Fschan, gate: Gatechan, dflag: int) { fsfilter->filter(ref Query(gate, dflag, chan of int), src, dst); gate <-= ((nil, nil, 0), nil); } Query.query(q: self ref Query, d: ref Sys->Dir, name: string, depth: int): int { if(depth == 0 || (q.dflag && (d.mode & Sys->DMDIR))) return 1; q.gate <-= ((d, name, depth), q.reply); return <-q.reply; }