ncurses 5.7 - patch 20090418

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

diff --git a/ncurses/widechar/lib_unget_wch.c b/ncurses/widechar/lib_unget_wch.c
index f4d0c518edfd713da1421ae1dc726ca38dac3547..1d2cf83ef8d2fcf0cdf7a0e1d11b18003a2a0f42 100644 (file)
--- a/ncurses/widechar/lib_unget_wch.c
+++ b/ncurses/widechar/lib_unget_wch.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 2002,2003 Free Software Foundation, Inc.                        *
+ * Copyright (c) 2002-2008,2009 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            *
@@ -39,31 +39,54 @@
 
 #include <curses.priv.h>
 
-MODULE_ID("$Id: lib_unget_wch.c,v 1.5 2003/07/05 19:46:51 tom Exp $")
+MODULE_ID("$Id: lib_unget_wch.c,v 1.11 2009/04/04 23:57:25 tom Exp $")
+
+/*
+ * Wrapper for wcrtomb() which obtains the length needed for the given
+ * wide-character 'source'.
+ */
+NCURSES_EXPORT(size_t)
+_nc_wcrtomb(char *target, wchar_t source, mbstate_t * state)
+{
+    int result;
+
+    if (target == 0) {
+       wchar_t temp[2];
+       const wchar_t *tempp = temp;
+       temp[0] = source;
+       temp[1] = 0;
+       result = wcsrtombs(NULL, &tempp, 0, state);
+    } else {
+       result = wcrtomb(target, source, state);
+    }
+    if (!isEILSEQ(result) && (result == 0))
+       result = 1;
+    return result;
+}
 
 NCURSES_EXPORT(int)
-unget_wch(const wchar_t wch)
+NCURSES_SP_NAME(unget_wch) (NCURSES_SP_DCLx const wchar_t wch)
 {
     int result = OK;
     mbstate_t state;
     size_t length;
     int n;
 
-    T((T_CALLED("unget_wch(%#lx)"), (unsigned long) wch));
+    T((T_CALLED("unget_wch(%p, %#lx)"), SP_PARM, (unsigned long) wch));
 
-    memset(&state, 0, sizeof(state));
-    length = wcrtomb(0, wch, &state);
+    init_mb(state);
+    length = _nc_wcrtomb(0, wch, &state);
 
     if (length != (size_t) (-1)
        && length != 0) {
        char *string;
 
        if ((string = (char *) malloc(length)) != 0) {
-           memset(&state, 0, sizeof(state));
+           init_mb(state);
            wcrtomb(string, wch, &state);
 
            for (n = (int) (length - 1); n >= 0; --n) {
-               if (ungetch(string[n]) != OK) {
+               if (NCURSES_SP_NAME(ungetch) (NCURSES_SP_ARGx string[n]) != OK) {
                    result = ERR;
                    break;
                }
@@ -78,3 +101,11 @@ unget_wch(const wchar_t wch)
 
     returnCode(result);
 }
+
+#if NCURSES_SP_FUNCS
+NCURSES_EXPORT(int)
+unget_wch(const wchar_t wch)
+{
+    return NCURSES_SP_NAME(unget_wch) (CURRENT_SCREEN, wch);
+}
+#endif