/****************************************************************************
- * Copyright (c) 2002,2003 Free Software Foundation, Inc. *
+ * Copyright 2020 Thomas E. Dickey *
+ * Copyright 2002-2011,2016 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 *
#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 1.17 2020/02/02 23:34:34 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 = (int) wcsrtombs(NULL, &tempp, (size_t) 0, state);
+ } else {
+ result = (int) wcrtomb(target, source, state);
+ }
+ if (!isEILSEQ(result) && (result == 0))
+ result = 1;
+ return (size_t) 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)"), (void *) 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));
- wcrtomb(string, wch, &state);
+ int n;
+
+ init_mb(state);
+ /* ignore the result, since we already validated the character */
+ IGNORE_RC((int) 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
+ UChar(string[n])) !=OK) {
result = ERR;
break;
}
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