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29 /****************************************************************************
30 * Author: Thomas E. Dickey 2002 *
31 ****************************************************************************/
36 ** The routine unget_wch().
40 #include <curses.priv.h>
42 MODULE_ID("$Id: lib_unget_wch.c,v 1.15 2011/10/22 16:34:50 tom Exp $")
45 * Wrapper for wcrtomb() which obtains the length needed for the given
46 * wide-character 'source'.
48 NCURSES_EXPORT(size_t)
49 _nc_wcrtomb(char *target, wchar_t source, mbstate_t * state)
55 const wchar_t *tempp = temp;
58 result = (int) wcsrtombs(NULL, &tempp, (size_t) 0, state);
60 result = (int) wcrtomb(target, source, state);
62 if (!isEILSEQ(result) && (result == 0))
64 return (size_t) result;
68 NCURSES_SP_NAME(unget_wch) (NCURSES_SP_DCLx const wchar_t wch)
75 T((T_CALLED("unget_wch(%p, %#lx)"), (void *) SP_PARM, (unsigned long) wch));
78 length = _nc_wcrtomb(0, wch, &state);
80 if (length != (size_t) (-1)
84 if ((string = (char *) malloc(length)) != 0) {
86 /* ignore the result, since we already validated the character */
87 IGNORE_RC((int) wcrtomb(string, wch, &state));
89 for (n = (int) (length - 1); n >= 0; --n) {
90 if (NCURSES_SP_NAME(ungetch) (NCURSES_SP_ARGx
91 UChar(string[n])) !=OK) {
109 unget_wch(const wchar_t wch)
111 return NCURSES_SP_NAME(unget_wch) (CURRENT_SCREEN, wch);