1 files changed, 50 insertions, 0 deletions
diff --git a/appl/alphabet/main/rw.b b/appl/alphabet/main/rw.b
new file mode 100644
index 00000000..74ede534
--- /dev/null
+++ b/appl/alphabet/main/rw.b
@@ -0,0 +1,50 @@
+implement Mainmodule;
+include "sys.m";
+	sys: Sys;
+include "draw.m";
+include "sh.m";
+include "alphabet/reports.m";
+	reports: Reports;
+		Report, report, quit: import reports;
+include "alphabet.m";
+	alphabet: Alphabet;
+		Value: import alphabet;
+
+typesig(): string
+{
+	return "fs";
+}
+
+init()
+{
+	sys = load Sys Sys->PATH;
+	alphabet = load Alphabet Alphabet->PATH;
+	reports = load Reports Reports->PATH;
+}
+
+run(nil: ref Draw->Context, r: ref Reports->Report, errorc: chan of string,
+		nil: list of (int, list of ref Alphabet->Value),
+		args: list of ref Alphabet->Value): ref Alphabet->Value
+{
+	f := chan of ref Sys->FD;
+	file := (hd args).s().i;
+	if((fd0 := sys->open(file, Sys->OREAD)) == nil){
+		report(errorc, sys->sprint("cannot open %q: %r", file));
+		return nil;
+	}
+	spawn readproc(f, fd0, r.start("read"));
+	return ref Value.F(f);
+}
+
+readproc(f: chan of ref Sys->FD, fd0: ref Sys->FD, errorc: chan of string)
+{
+	f <-= fd0;
+	fd1 := <-f;
+	if(fd1 == nil)
+		quit(errorc);
+	buf := array[8192] of byte;
+	while((n := sys->read(fd0, buf, len buf)) > 0)
+		sys->write(fd1, buf, n);
+	sys->write(fd1, array[0] of byte, 0);
+	quit(errorc);
+}