Line data    Source code

       1             : /*
       2             :  * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
       3             :  * (Royal Institute of Technology, Stockholm, Sweden).
       4             :  * All rights reserved.
       5             :  *
       6             :  * Redistribution and use in source and binary forms, with or without
       7             :  * modification, are permitted provided that the following conditions
       8             :  * are met:
       9             :  *
      10             :  * 1. Redistributions of source code must retain the above copyright
      11             :  *    notice, this list of conditions and the following disclaimer.
      12             :  *
      13             :  * 2. Redistributions in binary form must reproduce the above copyright
      14             :  *    notice, this list of conditions and the following disclaimer in the
      15             :  *    documentation and/or other materials provided with the distribution.
      16             :  *
      17             :  * 3. Neither the name of the Institute nor the names of its contributors
      18             :  *    may be used to endorse or promote products derived from this software
      19             :  *    without specific prior written permission.
      20             :  *
      21             :  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
      22             :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23             :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24             :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
      25             :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26             :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27             :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28             :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29             :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30             :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31             :  * SUCH DAMAGE.
      32             :  */
      33             : 
      34             : #include <config.h>
      35             : 
      36             : #include <stdlib.h>
      37             : #ifdef HAVE_UNISTD_H
      38             : #include <unistd.h>
      39             : #endif
      40             : #ifdef HAVE_SYS_TYPES_H
      41             : #include <sys/types.h>
      42             : #endif
      43             : 
      44             : #if 0 /* Where were those needed? /confused */
      45             : #ifdef HAVE_SYS_PROC_H
      46             : #include <sys/proc.h>
      47             : #endif
      48             : 
      49             : #ifdef HAVE_SYS_TTY_H
      50             : #include <sys/tty.h>
      51             : #endif
      52             : #endif
      53             : 
      54             : #ifdef HAVE_TERMIOS_H
      55             : #include <termios.h>
      56             : #endif
      57             : 
      58             : #include "roken.h"
      59             : 
      60             : ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
      61           0 : get_window_size(int fd, int *lines, int *columns)
      62             : {
      63             :     char *s;
      64             : 
      65             : #if defined(TIOCGWINSZ)
      66             :     {
      67             :         struct winsize ws;
      68             :         int ret;
      69           0 :         ret = ioctl(fd, TIOCGWINSZ, &ws);
      70           0 :         if (ret != -1) {
      71           0 :             if (lines)
      72           0 :                 *lines = ws.ws_row;
      73           0 :             if (columns)
      74           0 :                 *columns = ws.ws_col;
      75           0 :             return 0;
      76             :         }
      77             :     }
      78             : #elif defined(TIOCGSIZE)
      79             :     {
      80             :         struct ttysize ts;
      81             :         int ret;
      82             :         ret = ioctl(fd, TIOCGSIZE, &ts);
      83             :         if (ret != -1) {
      84             :             if (lines)
      85             :                 *lines = ts.ws_lines;
      86             :             if (columns)
      87             :                 *columns = ts.ts_cols;
      88             :             return 0;
      89             :         }
      90             :     }
      91             : #elif defined(HAVE__SCRSIZE)
      92             :     {
      93             :         int dst[2];
      94             : 
      95             :         _scrsize(dst);
      96             :         if (lines)
      97             :             *lines = dst[1];
      98             :         if (columns)
      99             :             *columns = dst[0];
     100             :         return 0;
     101             :     }
     102             : #elif defined(_WIN32)
     103             :     {
     104             :         intptr_t fh = 0;
     105             :         CONSOLE_SCREEN_BUFFER_INFO sb_info;
     106             : 
     107             :         fh = _get_osfhandle(fd);
     108             :         if (fh != (intptr_t) INVALID_HANDLE_VALUE &&
     109             :             GetConsoleScreenBufferInfo((HANDLE) fh, &sb_info)) {
     110             :             if (lines)
     111             :                 *lines = 1 + sb_info.srWindow.Bottom - sb_info.srWindow.Top;
     112             :             if (columns)
     113             :                 *columns = 1 + sb_info.srWindow.Right - sb_info.srWindow.Left;
     114             : 
     115             :             return 0;
     116             :         }
     117             :     }
     118             : #endif
     119           0 :     if (columns) {
     120           0 :         if ((s = getenv("COLUMNS")))
     121           0 :             *columns = atoi(s);
     122             :         else
     123           0 :             return -1;
     124             :     }
     125           0 :     if (lines) {
     126           0 :         if ((s = getenv("LINES")))
     127           0 :             *lines = atoi(s);
     128             :         else
     129           0 :             return -1;
     130             :     }
     131           0 :     return 0;
     132             : }