93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/*
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* tools.c - tools which are needed by client and server
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*
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* Copyright (c) 2001 Nico Schottelius <nico@schottelius.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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********/
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#include <stdio.h> /* NULL */
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#include <string.h>
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#include <stdlib.h>
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#include <sys/types.h> /* these three are */
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#include <sys/stat.h> /* needed for */
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#include <unistd.h> /* stat() */
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#include "headers/gpmInt.h" /* only used for some defines */
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#include "headers/message.h"
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/*****************************************************************************
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* check, whether devfs is used or not.
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* See /usr/src/linux/Documentation/filesystems/devfs/ for details.
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* Returns: the name of the console (/dev/tty0 or /dev/vc/0)
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*****************************************************************************/
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char *Gpm_get_console( void )
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{
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char *back = NULL, *tmp = NULL;
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struct stat buf;
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/* first try the devfs device, because in the next time this will be
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* the preferred one. If that fails, take the old console */
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/* Check for open new console */
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if (stat(GPM_DEVFS_CONSOLE,&buf) == 0)
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tmp = GPM_DEVFS_CONSOLE;
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/* Failed, try OLD console */
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else if(stat(GPM_OLD_CONSOLE,&buf) == 0)
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tmp = GPM_OLD_CONSOLE;
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if(tmp != NULL)
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if((back = malloc(strlen(tmp) + sizeof(char)) ) != NULL)
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strcpy(back,tmp);
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return(back);
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}
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/* what's the english name for potenz ? */
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int Gpm_x_high_y(int base, int pot_y)
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{
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int val = 1;
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if(pot_y == 0) val = 1;
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else if(pot_y < 0) val = 0; /* ugly hack ;) */
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else while(pot_y > 0) {
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val = val * base;
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pot_y--;
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}
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return val;
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}
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/* return characters needed to display int */
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int Gpm_cnt_digits(int number)
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{
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/* 0-9 = 1 10^0 <-> (10^1)-1
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* 10 - 99 = 2 10^1 <-> (10^2)-1
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* 100 - 999 = 3 10^2 <-> (10^3)-1
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* 1000 - 9999 = 4 ... */
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int ret = 0, num = 0;
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/* non negative, please */
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if(number < 0) number *= -1;
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else if(number == 0) ret = 1;
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else while(number > num) {
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ret++;
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num = (Gpm_x_high_y(10,ret) - 1);
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}
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return(ret);
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}
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