--- /dev/null
+/*
+ * ldisc.c: PuTTY line discipline. Sits between the input coming
+ * from keypresses in the window, and the output channel leading to
+ * the back end. Implements echo and/or local line editing,
+ * depending on what's currently configured.
+ */
+
+#include <stdio.h>
+#include <ctype.h>
+
+#include "putty.h"
+#include "terminal.h"
+#include "ldisc.h"
+
+void lpage_send(void *handle,
+ int codepage, char *buf, int len, int interactive)
+{
+ Ldisc ldisc = (Ldisc)handle;
+ wchar_t *widebuffer = 0;
+ int widesize = 0;
+ int wclen;
+
+ if (codepage < 0) {
+ ldisc_send(ldisc, buf, len, interactive);
+ return;
+ }
+
+ widesize = len * 2;
+ widebuffer = smalloc(widesize * sizeof(wchar_t));
+
+ wclen = mb_to_wc(codepage, 0, buf, len, widebuffer, widesize);
+ luni_send(ldisc, widebuffer, wclen, interactive);
+
+ sfree(widebuffer);
+}
+
+void luni_send(void *handle, wchar_t * widebuf, int len, int interactive)
+{
+ Ldisc ldisc = (Ldisc)handle;
+ int ratio = (in_utf(ldisc->term))?3:1;
+ char *linebuffer;
+ int linesize;
+ int i;
+ char *p;
+
+ linesize = len * ratio * 2;
+ linebuffer = smalloc(linesize * sizeof(wchar_t));
+
+ if (in_utf(ldisc->term)) {
+ /* UTF is a simple algorithm */
+ for (p = linebuffer, i = 0; i < len; i++) {
+ wchar_t ch = widebuf[i];
+ /* We only deal with 16-bit wide chars */
+ if ((ch&0xF800) == 0xD800) ch = '.';
+
+ if (ch < 0x80) {
+ *p++ = (char) (ch);
+ } else if (ch < 0x800) {
+ *p++ = (0xC0 | (ch >> 6));
+ *p++ = (0x80 | (ch & 0x3F));
+ } else {
+ *p++ = (0xE0 | (ch >> 12));
+ *p++ = (0x80 | ((ch >> 6) & 0x3F));
+ *p++ = (0x80 | (ch & 0x3F));
+ }
+ }
+ } else {
+ int rv;
+ rv = wc_to_mb(line_codepage, 0, widebuf, len,
+ linebuffer, linesize, NULL, NULL);
+ if (rv >= 0)
+ p = linebuffer + rv;
+ else
+ p = linebuffer;
+ }
+ if (p > linebuffer)
+ ldisc_send(ldisc, linebuffer, p - linebuffer, interactive);
+
+ sfree(linebuffer);
+}