usr/src/lib/libcurses/screen/makenew.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        <stdlib.h>
  45 #include        <string.h>
  46 #include        <sys/types.h>
  47 #include        "curses_inc.h"
  48
  49 /* This routine sets up a window buffer and returns a pointer to it. */
  50
  51 WINDOW  *
  52 _makenew(int nlines, int ncols, int begy, int begx)
  53 {
  54         /* order the register allocations against highest usage */
  55         WINDOW  *win;
  56
  57 #ifdef  DEBUG
  58         if (outf)
  59                 fprintf(outf, "MAKENEW(%d, %d, %d, %d)\n",
  60                     nlines, ncols, begy, begx);
  61 #endif  /* DEBUG */
  62
  63         if ((win = (WINDOW *) malloc(sizeof (WINDOW))) == NULL)
  64                 goto out_no_win;
  65         if ((win->_y = (chtype **) malloc(nlines * sizeof (chtype *))) == NULL)
  66                 goto out_win;
  67 #ifdef  _VR3_COMPAT_CODE
  68         if ((_y16update) && ((win->_y16 = (_ochtype **)
  69             calloc(1, nlines * sizeof (_ochtype *))) == NULL)) {
  70                 goto out_y16;
  71         }
  72 #endif  /* _VR3_COMPAT_CODE */
  73         if ((win->_firstch = (short *) malloc(2 * nlines * sizeof (short)))
  74             == NULL) {
  75 #ifdef  _VR3_COMPAT_CODE
  76                 if ((_y16update) && (win->_y16 != NULL))
  77                         free((char *) win->_y16);
  78 out_y16:
  79 #endif  /* _VR3_COMPAT_CODE */
  80                 free((char *) win->_y);
  81 out_win:
  82                 free((char *) win);
  83 out_no_win:
  84                 curs_errno = CURS_BAD_MALLOC;
  85 #ifdef  DEBUG
  86                 strcpy(curs_parm_err, "_makenew");
  87 #endif  /* DEBUG */
  88                 return ((WINDOW *) NULL);
  89         } else
  90                 win->_lastch = win->_firstch + nlines;
  91
  92         win->_cury = win->_curx = 0;
  93         /*LINTED*/
  94         win->_maxy = (short) nlines;
  95         /*LINTED*/
  96         win->_maxx = (short) ncols;
  97         /*LINTED*/
  98         win->_begy = (short) begy;
  99         /*LINTED*/
 100         win->_begx = (short) begx;
 101         win->_clear = (((begy + SP->Yabove + begx) == 0) &&
 102             (nlines >= (LINES + SP->Yabove)) && (ncols >= COLS));
 103         win->_leave = win->_scroll = win->_use_idl = win->_use_keypad =
 104             win->_notimeout = win->_immed = win->_sync = FALSE;
 105         win->_use_idc = TRUE;
 106         win->_ndescs = win->_tmarg = 0;
 107         win->_bmarg = nlines - 1;
 108         win->_bkgd = _BLNKCHAR;
 109         win->_delay = win->_parx = win->_pary = -1;
 110         win->_attrs = A_NORMAL;
 111         win->_flags = _WINCHANGED;
 112         win->_parent = win->_padwin = (WINDOW *) NULL;
 113         (void) memset((char *) win->_firstch, 0, (nlines * sizeof (short)));
 114         {
 115                 short   *lastch = win->_lastch,
 116                         *elastch = lastch + nlines;
 117
 118                 ncols--;
 119                 while (lastch < elastch)
 120                     /*LINTED*/
 121                     *lastch++ = (short) ncols;
 122         }
 123
 124         win->_insmode = FALSE;
 125         win->_index = 0;
 126         win->_nbyte = -1;
 127
 128 #ifdef  DEBUG
 129         if (outf) {
 130                 fprintf(outf, "MAKENEW: win->_clear = %d\n", win->_clear);
 131                 fprintf(outf, "MAKENEW: win->_flags = %0.2o\n", win->_flags);
 132                 fprintf(outf, "MAKENEW: win->_maxy = %d\n", win->_maxy);
 133                 fprintf(outf, "MAKENEW: win->_maxx = %d\n", win->_maxx);
 134                 fprintf(outf, "MAKENEW: win->_begy = %d\n", win->_begy);
 135                 fprintf(outf, "MAKENEW: win->_begx = %d\n", win->_begx);
 136         }
 137 #endif  /* DEBUG */
 138         return (win);
 139 }