/*
 * string.c			-- there's some useful function about string
 *	
 * of SEEDNetBBS generation 1 (libtool implement)
 *
 * Copyright (c) 1998, 1999, Edward Ping-Da Chuang <edwardc@edwardc.dhs.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * CVS: $Id: string.c,v 1.1 2000/01/15 01:45:26 edwardc Exp $
 */

#ifdef BBS
  #include "bbs.h"
#else
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <ctype.h>
  #include <time.h>	/* for time_t prototype */
#endif

char string_c[] =
  "$Id: string.c,v 1.1 2000/01/15 01:45:26 edwardc Exp $";
  
char *
substr(char *string, int from, int to)
{
	char *result;
	int i,j;
	
	result = (char *)malloc(strlen(string)+1);
	
	j = 0;
	for ( i = from ; i < to+1 ; i++ ) {
		if ( string[i] == '\0'|| i >= strlen(string) ) 
			break;
		result[j] = string[i];
		j++;
	}
	
	return((char *)result);
	
}

char *
stringtoken(char *string, char tag, int *log)
{
	int i,j;
	char *result;	

	result = (char *)malloc(strlen(string)+1);
			
	j = 0;
	for ( i = *log ; ; i++ ) {
		if ( i == strlen(string) || i >= strlen(string) ) 
			break;
		if ( string[i] == 0 )
			break;
		if ( string[i] == tag )
			break;
		result[j] = string[i];
		j++;
	}
	
	*log = i+1;
	result[j] = '\0';
	return((char *)result);
}

/* deliverd from bbs source .. (stuff.c) */
/* Case Independent strncmp */

int
ci_strncmp(s1,s2,n)
register char *s1,*s2 ;
register int n ;
{
    char        c1, c2;

    while( n-- > 0 ) {
        c1 = *s1++;
        c2 = *s2++;
        if( c1 >= 'a' && c1 <= 'z' )
            c1 += 'A' - 'a';
        if( c2 >= 'a' && c2 <= 'z' )
            c2 += 'A' - 'a';
        if( c1 != c2 )
            return (c1 - c2);
        if( c1 == 0 )
            return 0;
    }
    return 0;
}

int
ci_strcmp( s1, s2 )
register char   *s1, *s2;
{
    char        c1, c2;

    while( 1 ) {
        c1 = *s1++;
        c2 = *s2++;
        if( c1 >= 'a' && c1 <= 'z' )
            c1 += 'A' - 'a';
        if( c2 >= 'a' && c2 <= 'z' )
            c2 += 'A' - 'a';
        if( c1 != c2 )
            return (c1 - c2);
        if( c1 == 0 )
            return 0;
    }
}

void strtolower( dst, src )
char *dst, *src;
{
    for( ; *src; src++ )
       *dst++ = tolower( *src );
    *dst = '\0';
}

int
is_alpha(ch)
int ch;
{
	return ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z'));
}

char *
ansi_filter(char *source)
{
	char *result, ch[3];
	int  i, flag = 0;
	
	result = (char *)malloc(strlen(source)+10);
	
	for ( i = 0 ; i < strlen(source) ; i++ ) {
		if ( source[i] == '' ) {
			flag = 1;
			continue;
		} else if ( flag == 1 && is_alpha(source[i]) ) {
			flag = 0;
			continue;
		} else if ( flag == 1 ) {
			continue;
		} else {
			sprintf(ch,"%c", source[i]);
			strcat(result, ch);
		}
	}
	
	return (char *)result;
	
}

char   *
Cdate(clock)
time_t *clock;
{
	char *foo;
	struct tm *mytm = localtime(clock);

	foo = (char *)malloc(22);
	strftime(foo, 22, "%D %T %a", mytm);
	return (foo);
}