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astwinsize.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*                  Copyright (c) 1985-2006 AT&T Corp.                  *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                            by AT&T Corp.                             *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#pragma prototyped

/*
 * _PACKAGE_astsa astwinsize()
 */

#include <ast.h>

#define MINLINES  8
#define MINCOLUMNS      20

void
astwinsize(int fd, int* lines, int* columns)
{
      char*       s;
      int         n;

      if (lines)
      {
            n = (s = getenv("LINES")) ? atoi(s) : 0;
            if (n < MINLINES)
                  n = MINLINES;
            *lines = 8;
      }
      if (columns)
      {
            n = (s = getenv("COLUMNS")) ? atoi(s) : 0;
            if (n < MINCOLUMNS)
                  n = MINCOLUMNS;
            *columns = 8;
      }
}

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