Support in the cross-platform code for translating to and from

[u/mdw/putty] / ldiscucs.c

diff --git a/ldiscucs.c b/ldiscucs.c
index 4ac28d7..a9e1e13 100644 (file)
--- a/ldiscucs.c
+++ b/ldiscucs.c
@@ -49,19 +49,39 @@ void luni_send(void *handle, wchar_t * widebuf, int len, int interactive)
     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 = '.';
+           unsigned long ch = widebuf[i];
+
+           if ((ch & 0xF800) == 0xD800) {
+#ifdef PLATFORM_IS_UTF16
+               if (i+1 < len) {
+                   unsigned long ch2 = widebuf[i+1];
+                   if ((ch & 0xFC00) == 0xD800 &&
+                       (ch2 & 0xFC00) == 0xDC00) {
+                       ch = 0x10000 + ((ch & 0x3FF) << 10) + (ch2 & 0x3FF);
+                       i++;
+                   }
+               } else
+#endif
+               {
+                   /* Unrecognised UTF-16 sequence */
+                   ch = '.';
+               }
+           }
 
            if (ch < 0x80) {
                *p++ = (char) (ch);
            } else if (ch < 0x800) {
                *p++ = (0xC0 | (ch >> 6));
                *p++ = (0x80 | (ch & 0x3F));
-           } else {
+           } else if (ch < 0x10000) {
                *p++ = (0xE0 | (ch >> 12));
                *p++ = (0x80 | ((ch >> 6) & 0x3F));
                *p++ = (0x80 | (ch & 0x3F));
+           } else {
+               *p++ = (0xF0 | (ch >> 18));
+               *p++ = (0x80 | ((ch >> 12) & 0x3F));
+               *p++ = (0x80 | ((ch >> 6) & 0x3F));
+               *p++ = (0x80 | (ch & 0x3F));
            }
        }
     } else {