1 /**************************************************************************** 2 * Copyright (c) 2002-2010,2011 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Thomas E. Dickey 2002 * 31 ****************************************************************************/ 32 33 /* 34 ** lib_unget_wch.c 35 ** 36 ** The routine unget_wch(). 37 ** 38 */ 39 40 #include <curses.priv.h> 41 42 MODULE_ID("$Id: lib_unget_wch.c,v 1.15 2011/10/22 16:34:50 tom Exp $") 43 44 /* 45 * Wrapper for wcrtomb() which obtains the length needed for the given 46 * wide-character 'source'. 47 */ 48 NCURSES_EXPORT(size_t) 49 _nc_wcrtomb(char *target, wchar_t source, mbstate_t * state) 50 { 51 int result; 52 53 if (target == 0) { 54 wchar_t temp[2]; 55 const wchar_t *tempp = temp; 56 temp[0] = source; 57 temp[1] = 0; 58 result = (int) wcsrtombs(NULL, &tempp, (size_t) 0, state); 59 } else { 60 result = (int) wcrtomb(target, source, state); 61 } 62 if (!isEILSEQ(result) && (result == 0)) 63 result = 1; 64 return (size_t) result; 65 } 66 67 NCURSES_EXPORT(int) 68 NCURSES_SP_NAME(unget_wch) (NCURSES_SP_DCLx const wchar_t wch) 69 { 70 int result = OK; 71 mbstate_t state; 72 size_t length; 73 int n; 74 75 T((T_CALLED("unget_wch(%p, %#lx)"), (void *) SP_PARM, (unsigned long) wch)); 76 77 init_mb(state); 78 length = _nc_wcrtomb(0, wch, &state); 79 80 if (length != (size_t) (-1) 81 && length != 0) { 82 char *string; 83 84 if ((string = (char *) malloc(length)) != 0) { 85 init_mb(state); 86 /* ignore the result, since we already validated the character */ 87 IGNORE_RC((int) wcrtomb(string, wch, &state)); 88 89 for (n = (int) (length - 1); n >= 0; --n) { 90 if (NCURSES_SP_NAME(ungetch) (NCURSES_SP_ARGx 91 UChar(string[n])) !=OK) { 92 result = ERR; 93 break; 94 } 95 } 96 free(string); 97 } else { 98 result = ERR; 99 } 100 } else { 101 result = ERR; 102 } 103 104 returnCode(result); 105 } 106 107 #if NCURSES_SP_FUNCS 108 NCURSES_EXPORT(int) 109 unget_wch(const wchar_t wch) 110 { 111 return NCURSES_SP_NAME(unget_wch) (CURRENT_SCREEN, wch); 112 } 113 #endif 114