1 files changed, 49 insertions, 0 deletions
diff --git a/appl/lib/convcs/cp_stob.b b/appl/lib/convcs/cp_stob.b
new file mode 100644
index 00000000..40c70792
--- /dev/null
+++ b/appl/lib/convcs/cp_stob.b
@@ -0,0 +1,49 @@
+implement Stob;
+
+include "sys.m";
+include "convcs.m";
+
+sys : Sys;
+map : array of byte;
+
+ERRCHAR : con 16rFFFD;
+
+init(arg : string) : string
+{
+	sys = load Sys Sys->PATH;
+	if (arg == nil)
+		return "codepage path required";
+	fd := sys->open(arg, Sys->OREAD);
+	if (fd == nil)
+		return sys->sprint("%s: %r", arg);
+
+	buf := array[Sys->UTFmax * 256] of byte;
+	nread := 0;
+	for (;nread < len buf;) {
+		toread := len buf - nread;
+		n := sys->read(fd, buf[nread:], toread);
+		if (n <= 0)
+			break;
+		nread += n;
+	}
+	codepage := string buf[0:nread];
+	if (len codepage != 256) {
+		codepage = nil;
+		return sys->sprint("%s: bad codepage", arg);
+	}
+	buf = nil;
+	map = array[16r10000] of { * => byte '?' };
+	for (i := 0; i < 256; i++)
+		map[codepage[i]] = byte i;
+	return nil;
+}
+
+stob(nil : Convcs->State, str : string) : (Convcs->State, array of byte)
+{
+	b := array [len str] of byte;
+	n := len str;
+
+	for (i := 0; i < n; i++)
+		b[i] = map[str[i]];
+	return (nil, b);
+}
+\ No newline at end of file