usr/src/lib/libcurses/screen/slk_set.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * University Copyright- Copyright (c) 1982, 1986, 1988
  32  * The Regents of the University of California
  33  * All Rights Reserved
  34  *
  35  * University Acknowledgment- Portions of this document are derived from
  36  * software developed by the University of California, Berkeley, and its
  37  * contributors.
  38  */
  39
  40 #pragma ident   "%Z%%M% %I%     %E% SMI"
  41
  42 /*LINTLIBRARY*/
  43
  44 #include        <sys/types.h>
  45 #include        <string.h>
  46 #include        <unistd.h>
  47 #include        "curses_inc.h"
  48
  49 /*
  50  * Set a soft label.
  51  *
  52  * n:   label number
  53  * lab: the string
  54  * f:   0, 1, 2 for left, center, right-justification
  55  */
  56
  57 int
  58 slk_set(int n, char *lab, int f)
  59 {
  60         SLK_MAP *slk = SP->slk;
  61         int     len, slklen = slk->_len, left;
  62         char            *cp, nlab[LABLEN + 1];
  63
  64         if ((slk == NULL) || f < 0 || f > 2 || n < 1 || n > slk->_num)
  65                 return (ERR);
  66
  67         /* 0-indexing internally */
  68         n--;
  69
  70         if (lab == NULL) {
  71                 lab = "";
  72
  73         } else {
  74                 /* chop lengthy label */
  75                 /* LINTED */
  76                 if ((len = (int) strlen(lab)) > slklen)
  77                         lab[len = slklen] = '\0';
  78         }
  79
  80         /* make the new display label */
  81         for (cp = nlab + slklen - 1; cp >= nlab; cp--)
  82                 *cp = ' ';
  83         nlab[slklen] = '\0';
  84         if (f == 0)
  85                 left = 0;
  86         else
  87                 left = (slklen - len) / ((f == 1) ? 2 : 1);
  88
  89         (void) memcpy(nlab + left, lab, len);
  90
  91         if (strcmp(slk->_ldis[n], nlab) != 0) {
  92                 (void) memcpy(slk->_lval[n], lab, len + 1);
  93                 (void) memcpy(slk->_ldis[n], nlab, slklen + 1);
  94                 slk->_changed = slk->_lch[n] = TRUE;
  95         }
  96
  97         return (OK);
  98 }