lib/libcurses/addnstr.c

   1 /*      $NetBSD: addnstr.c,v 1.13 2012/09/28 06:07:05 blymn Exp $       */
   2
   3 /*
   4  * Copyright (c) 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)addnstr.c   8.2 (Berkeley) 5/4/94";
  36 #else
  37 __RCSID("$NetBSD: addnstr.c,v 1.13 2012/09/28 06:07:05 blymn Exp $");
  38 #endif
  39 #endif                          /* not lint */
  40
  41 #include <string.h>
  42
  43 #include "curses.h"
  44 #include "curses_private.h"
  45
  46 #ifndef _CURSES_USE_MACROS
  47
  48 /*
  49  * addstr --
  50  *      Add a string to stdscr starting at (_cury, _curx).
  51  */
  52 int
  53 addstr(const char *s)
  54 {
  55         return waddnstr(stdscr, s, -1);
  56 }
  57
  58 /*
  59  * waddstr --
  60  *      Add a string to the given window starting at (_cury, _curx).
  61  */
  62 int
  63 waddstr(WINDOW *win, const char *s)
  64 {
  65         return waddnstr(win, s, -1);
  66 }
  67
  68 /*
  69  * addnstr --
  70  *      Add a string (at most n characters) to stdscr starting
  71  *      at (_cury, _curx).  If n is negative, add the entire string.
  72  */
  73 int
  74 addnstr(const char *str, int n)
  75 {
  76         return waddnstr(stdscr, str, n);
  77 }
  78
  79 /*
  80  * mvaddstr --
  81  *      Add a string to stdscr starting at (y, x)
  82  */
  83 int
  84 mvaddstr(int y, int x, const char *str)
  85 {
  86         return mvwaddnstr(stdscr, y, x, str, -1);
  87 }
  88
  89 /*
  90  * mvwaddstr --
  91  *      Add a string to the given window starting at (y, x)
  92  */
  93 int
  94 mvwaddstr(WINDOW *win, int y, int x, const char *str)
  95 {
  96         return mvwaddnstr(win, y, x, str, -1);
  97 }
  98
  99 /*
 100  * mvaddnstr --
 101  *      Add a string of at most n characters to stdscr
 102  *      starting at (y, x).
 103  */
 104 int
 105 mvaddnstr(int y, int x, const char *str, int count)
 106 {
 107         return mvwaddnstr(stdscr, y, x, str, count);
 108 }
 109
 110 /*
 111  * mvwaddnstr --
 112  *      Add a string of at most n characters to the given window
 113  *      starting at (y, x).
 114  */
 115 int
 116 mvwaddnstr(WINDOW *win, int y, int x, const char *str, int count)
 117 {
 118         if (wmove(win, y, x) == ERR)
 119                 return ERR;
 120
 121         return waddnstr(win, str, count);
 122 }
 123
 124 #endif
 125
 126 /*
 127  * waddnstr --
 128  *      Add a string (at most n characters) to the given window
 129  *      starting at (_cury, _curx).  If n is negative, add the
 130  *      entire string.
 131  */
 132 int
 133 waddnstr(WINDOW *win, const char *s, int n)
 134 {
 135         size_t  len;
 136         const char *p;
 137
 138 #ifdef DEBUG
 139                 __CTRACE(__CTRACE_INPUT, "ADDNSTR: win %p, length %d\n",
 140                          win, n);
 141 #endif
 142         /*
 143          * behavior changed from traditional BSD curses, for better XCURSES
 144          * conformance.
 145          *
 146          * BSD curses: if (n > 0) then "at most n", else "len = strlen(s)"
 147          * ncurses: if (n >= 0) then "at most n", else "len = strlen(s)"
 148          * XCURSES: if (n != -1) then "at most n", else "len = strlen(s)"
 149          *
 150          * Also SUSv2 says these functions do not wrap nor change the
 151          * cursor position.
 152          */
 153         if (n >= 0)
 154                 for (p = s, len = 0; n-- && *p++; ++len);
 155         else
 156                 len = strlen(s);
 157
 158         if (len > (win->maxx - win->curx))
 159                 len = win->maxx - win->curx;
 160
 161         return(waddbytes(win, s, (int) len));
 162 }