1 /**************************************************************************** 2 * Copyright 2018,2020 Thomas E. Dickey * 3 * Copyright 2004-2009,2016 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Thomas E. Dickey * 32 ****************************************************************************/ 33 34 /* 35 ** lib_insnstr.c 36 ** 37 ** The routine winsnstr(). 38 ** 39 */ 40 41 #include <curses.priv.h> 42 #include <ctype.h> 43 44 MODULE_ID("$Id: lib_insnstr.c,v 1.7 2020/02/02 23:34:34 tom Exp $") 45 46 NCURSES_EXPORT(int) 47 winsnstr(WINDOW *win, const char *s, int n) 48 { 49 int code = ERR; 50 const unsigned char *str = (const unsigned char *) s; 51 52 T((T_CALLED("winsnstr(%p,%s,%d)"), (void *) win, _nc_visbufn(s, n), n)); 53 54 if (win != 0 && str != 0) { 55 SCREEN *sp = _nc_screen_of(win); 56 #if USE_WIDEC_SUPPORT 57 /* 58 * If the output contains "wide" (multibyte) characters, we will not 59 * really know the width of a character until we get the last byte 60 * of the character. Since the preceding byte(s) may use more columns 61 * on the screen than the final character, it is best to route the 62 * call to the wins_nwstr() function. 63 */ 64 if (sp->_screen_unicode) { 65 size_t nn = (n > 0) ? (size_t) n : strlen(s); 66 wchar_t *buffer = typeMalloc(wchar_t, nn + 1); 67 if (buffer != 0) { 68 mbstate_t state; 69 size_t n3; 70 init_mb(state); 71 n3 = mbstowcs(buffer, s, nn); 72 if (n3 != (size_t) (-1)) { 73 code = wins_nwstr(win, buffer, (int) n3); 74 } 75 free(buffer); 76 } 77 } 78 if (code == ERR) 79 #endif 80 { 81 NCURSES_SIZE_T oy = win->_cury; 82 NCURSES_SIZE_T ox = win->_curx; 83 const unsigned char *cp; 84 85 for (cp = str; (n <= 0 || (cp - str) < n) && *cp; cp++) { 86 _nc_insert_ch(sp, win, (chtype) UChar(*cp)); 87 } 88 win->_curx = ox; 89 win->_cury = oy; 90 _nc_synchook(win); 91 code = OK; 92 } 93 } 94 returnCode(code); 95 } 96