ncurses 5.6 - patch 20070714

[ncurses.git] / ncurses / widechar / lib_get_wch.c

diff --git a/ncurses/widechar/lib_get_wch.c b/ncurses/widechar/lib_get_wch.c
index e2a7ce55980938219dc5b4af60e95d184e16036c..7985df2571dbf5a0ddeb8eb0cbd7582874cf559e 100644 (file)
--- a/ncurses/widechar/lib_get_wch.c
+++ b/ncurses/widechar/lib_get_wch.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 2002 Free Software Foundation, Inc.                        *
+ * Copyright (c) 2002-2006,2007 Free Software Foundation, Inc.              *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
@@ -27,7 +27,7 @@
  ****************************************************************************/
 
 /****************************************************************************
- *  Author: Thomas E. Dickey 2002                                           *
+ *  Author: Thomas E. Dickey 2002-on                                        *
  ****************************************************************************/
 
 /*
@@ -38,28 +38,47 @@
 */
 
 #include <curses.priv.h>
+#include <ctype.h>
 
-MODULE_ID("$Id: lib_get_wch.c,v 1.5 2002/09/02 00:04:25 tom Exp $")
+MODULE_ID("$Id: lib_get_wch.c,v 1.14 2007/05/12 19:03:16 tom Exp $")
+
+#if HAVE_MBTOWC && HAVE_MBLEN
+#define reset_mbytes(state) mblen(NULL, 0), mbtowc(NULL, NULL, 0)
+#define count_mbytes(buffer,length,state) mblen(buffer,length)
+#define check_mbytes(wch,buffer,length,state) \
+       (int) mbtowc(&wch, buffer, length)
+#define state_unused
+#elif HAVE_MBRTOWC && HAVE_MBRLEN
+#define reset_mbytes(state) init_mb(state)
+#define count_mbytes(buffer,length,state) mbrlen(buffer,length,&state)
+#define check_mbytes(wch,buffer,length,state) \
+       (int) mbrtowc(&wch, buffer, length, &state)
+#else
+make an error
+#endif
 
 NCURSES_EXPORT(int)
-wget_wch(WINDOW *win, wint_t * result)
+wget_wch(WINDOW *win, wint_t *result)
 {
     int code;
     char buffer[(MB_LEN_MAX * 9) + 1]; /* allow some redundant shifts */
     int status;
-    mbstate_t state;
     size_t count = 0;
     unsigned long value;
     wchar_t wch;
+#ifndef state_unused
+    mbstate_t state;
+#endif
 
     T((T_CALLED("wget_wch(%p)"), win));
+
     /*
      * We can get a stream of single-byte characters and KEY_xxx codes from
      * _nc_wgetch(), while we want to return a wide character or KEY_xxx code.
      */
     for (;;) {
-       T(("reading %d of %d", count + 1, sizeof(buffer)));
-       code = _nc_wgetch(win, &value, TRUE);
+       T(("reading %d of %d", (int) count + 1, (int) sizeof(buffer)));
+       code = _nc_wgetch(win, &value, TRUE EVENTLIST_2nd((_nc_eventlist *) 0));
        if (code == ERR) {
            break;
        } else if (code == KEY_CODE_YES) {
@@ -71,22 +90,23 @@ wget_wch(WINDOW *win, wint_t * result)
             * would be worth the effort.
             */
            if (count != 0) {
-               ungetch(value);
+               ungetch((int) value);
                code = ERR;
            }
            break;
        } else if (count + 1 >= sizeof(buffer)) {
-           ungetch(value);
+           ungetch((int) value);
            code = ERR;
            break;
        } else {
            buffer[count++] = UChar(value);
-           memset(&state, 0, sizeof(state));
-           status = mbrlen(buffer, count, &state);
+           reset_mbytes(state);
+           status = count_mbytes(buffer, count, state);
            if (status >= 0) {
-               memset(&state, 0, sizeof(state));
-               if ((int) mbrtowc(&wch, buffer, count, &state) != status) {
+               reset_mbytes(state);
+               if (check_mbytes(wch, buffer, count, state) != status) {
                    code = ERR; /* the two calls should match */
+                   ungetch((int) value);
                }
                value = wch;
                break;