lib/libcurses/addchnstr.c

   1 /*      $NetBSD: addchnstr.c,v 1.5 2012/09/28 06:00:39 blymn Exp $      */
   2
   3 /*
   4  * Copyright (c) 2003 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Douwe Kiela (virtus@wanadoo.nl).
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __RCSID("$NetBSD: addchnstr.c,v 1.5 2012/09/28 06:00:39 blymn Exp $");
  35 #endif                          /* not lint */
  36
  37 #include <stdlib.h>
  38
  39 #include "curses.h"
  40 #include "curses_private.h"
  41
  42 #ifndef _CURSES_USE_MACROS
  43
  44 /*
  45  * addchstr --
  46  *      Add a string to stdscr starting at (_cury, _curx).
  47  */
  48 int
  49 addchstr(const chtype *chstr)
  50 {
  51         return waddchnstr(stdscr, chstr, -1);
  52 }
  53
  54 /*
  55  * waddchstr --
  56  *      Add a string to the given window starting at (_cury, _curx).
  57  */
  58 int
  59 waddchstr(WINDOW *win, const chtype *chstr)
  60 {
  61         return waddchnstr(win, chstr, -1);
  62 }
  63
  64 /*
  65  * addchnstr --
  66  *      Add a string (at most n characters) to stdscr starting
  67  *      at (_cury, _curx).  If n is negative, add the entire string.
  68  */
  69 int
  70 addchnstr(const chtype *chstr, int n)
  71 {
  72         return waddchnstr(stdscr, chstr, n);
  73 }
  74
  75 /*
  76  * mvaddchstr --
  77  *      Add a string to stdscr starting at (y, x)
  78  */
  79 int
  80 mvaddchstr(int y, int x, const chtype *chstr)
  81 {
  82         return mvwaddchnstr(stdscr, y, x, chstr, -1);
  83 }
  84
  85 /*
  86  * mvwaddchstr --
  87  *      Add a string to the given window starting at (y, x)
  88  */
  89 int
  90 mvwaddchstr(WINDOW *win, int y, int x, const chtype *chstr)
  91 {
  92         return mvwaddchnstr(win, y, x, chstr, -1);
  93 }
  94
  95 /*
  96  * mvaddchnstr --
  97  *      Add a string of at most n characters to stdscr
  98  *      starting at (y, x).
  99  */
 100 int
 101 mvaddchnstr(int y, int x, const chtype *chstr, int n)
 102 {
 103         return mvwaddchnstr(stdscr, y, x, chstr, n);
 104 }
 105
 106 /*
 107  * mvwaddchnstr --
 108  *      Add a string of at most n characters to the given window
 109  *      starting at (y, x).
 110  */
 111 int
 112 mvwaddchnstr(WINDOW *win, int y, int x, const chtype *chstr, int n)
 113 {
 114         if (wmove(win, y, x) == ERR)
 115                 return ERR;
 116
 117         return waddchnstr(win, chstr, n);
 118 }
 119
 120 #endif
 121
 122 /*
 123  * waddchnstr --
 124  *      Add a string (at most n characters) to the given window
 125  *      starting at (_cury, _curx) until the end of line is reached or
 126  *      n characters have been added.  If n is negative, add as much
 127  *      of the string that will fit on the current line.  SUSv2 says
 128  *      that the addchnstr family does not wrap and strings are truncated
 129  *      to the RHS of the window.
 130  */
 131 int
 132 waddchnstr(WINDOW *win, const chtype *chstr, int n)
 133 {
 134         size_t  len;
 135         const chtype *chp;
 136         attr_t  attr;
 137         char    *ocp, *cp, *start;
 138         int i, ret;
 139
 140 #ifdef DEBUG
 141         __CTRACE(__CTRACE_INPUT, "waddchnstr: win = %p, chstr = %p, n = %d\n",
 142             win, chstr, n);
 143 #endif
 144
 145         if (n >= 0)
 146                 for (chp = chstr, len = 0; n-- && *chp++; ++len);
 147         else
 148                 for (chp = chstr, len = 0; *chp++; ++len);
 149
 150         /* check if string is too long for current location */
 151         if (len > (win->maxx - win->curx))
 152                 len = win->maxx - win->curx;
 153
 154         if ((ocp = malloc(len + 1)) == NULL)
 155                 return ERR;
 156         chp = chstr;
 157         cp = ocp;
 158         start = ocp;
 159         i = 0;
 160         attr = (*chp) & __ATTRIBUTES;
 161         while (len) {
 162                 *cp = (*chp) & __CHARTEXT;
 163                 cp++;
 164                 chp++;
 165                 i++;
 166                 len--;
 167                 if (((*chp) & __ATTRIBUTES) != attr) {
 168                         *cp = '\0';
 169                         if (__waddbytes(win, start, i, attr) == ERR) {
 170                                 free(ocp);
 171                                 return ERR;
 172                         }
 173                         attr = (*chp) & __ATTRIBUTES;
 174                         start = cp;
 175                         i = 0;
 176                 }
 177         }
 178         *cp = '\0';
 179         ret = __waddbytes(win, start, i, attr);
 180         free(ocp);
 181         return ret;
 182 }