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implement Read,Mainmodule;
include "sys.m";
sys: Sys;
include "draw.m";
include "sh.m";
include "alphabet/reports.m";
reports: Reports;
Report, report: import reports;
include "alphabet.m";
alphabet: Alphabet;
Value: import alphabet;
Read: module{};
typesig(): string
{
return "fs";
}
init()
{
sys = load Sys Sys->PATH;
alphabet = load Alphabet Alphabet->PATH;
reports = load Reports Reports->PATH;
}
quit()
{
}
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.Vf(f);
}
readproc(f: chan of ref Sys->FD, fd0: ref Sys->FD, errorc: chan of string)
{
f <-= fd0;
fd1 := <-f;
if(fd1 == nil)
reports->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);
reports->quit(errorc);
}
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