lib.c

tcp protocol proxy,it is userful!

/*

    File: tcpproxy/lib.c
    Version 1.0
    
    Copyright (C) 1999 by Wolfgang Zekoll  <[e-mail]>

    This source is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2, or (at your option)
    any later version.

    This source is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <time.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "lib.h"

#define	DEBUG(x)		


void *allocate(size_t size)
{
	void	*p;

	if ((p = malloc(size)) == NULL) {
		fprintf (stderr, "%s: memory allocation error\n", program);
		exit (-1);
		}

	memset(p, 0, size);
	return (p);
}

void *reallocate(void *p, size_t size)
{
	if ((p = realloc(p, size)) == NULL) {
		fprintf (stderr, "%s: memory allocation error\n", program);
		exit (-1);
		}

	return (p);
}



static unsigned int lower[256], upper[256];

static int _init_upper()
{
	unsigned int c;
	
	DEBUG( fprintf (stderr, "init upper[]\n"); )
	for (c = 0; c < 256; c++)
		upper[c] = c;

	DEBUG( fprintf (stderr, "init uppercase letters\n"); )
	for (c = 'a'; c < 'z'+1; c++)
		upper[c] = 'A' + (c - 'a');

	DEBUG( fprintf (stderr, "init umlaute\n"); )
	upper[c = (unsigned char) '