/*
 *
 *  This file is part of the XForms library package.
 *
 * XForms is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1, or
 * (at your option) any later version.
 *
 * XForms 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with XForms; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
 * MA 02111-1307, USA.
 *
 */


/**
 * \file space.c
 *
 *.  Copyright(c) 1993,1994 by T.C. Zhao
 *   All rights reserved.
 *.
 *
 *
 *  Remove unescaped leadingi/trailing spaces from a string.
 *
 ***********************************************************************/

#if ! defined lint && defined F_OK
static char *id_space = "$Id: space.c,v 1.7 2008/05/05 14:21:54 jtt Exp $";
#endif

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <string.h>
#include <ctype.h>

#include "include/forms.h"
#include "flinternal.h"
#include "ulib.h"


static int es = '\\';     /* escape character */


/***************************************
 * Remove leading space
 ***************************************/

char *
fli_de_space( char * s )
{
    char *p;

    /* not all isspace considers '\t' a white space */

    for ( p = s; p && ( isspace( ( int ) *p ) || *p == '\t' ); p++ )
		/* empty */ ;

    return p == s ? s : strcpy( s, p );
}


/***************************************
 * remove trailing space
 ***************************************/

char *
fli_space_de( char * s )
{
	char *p,
		 *q;

    if ( ! s || ! *s )
		return s;

    q = p = s + strlen( s ) - 1;

    /* maybe replace \ with space ? */

    for ( q--; p >= s && isspace( ( int ) *p ) && ( q < s || *q != es );
		  p--,q-- )
        /* empty */ ;

    *++p = '\0';
    return s;
}


/***************************************
 * remove space from both ends
 ***************************************/

char *
fli_de_space_de( char * p )
{
    return fli_space_de( fli_de_space( p ) );
}


/***************************************
 * remove all spaces from string
 * This is bullshit!
 ***************************************/

char *
fli_nuke_all_spaces( char * s )
{
    char *p = s,
		 *q = s + strlen( s ),
		 *b;
    char buf[ 1024 ];

    for ( b = buf; p < q; p++ )
        if ( ! isspace( ( int ) *p ) )
			*b++ = *p;
    *b = '\0';
    return strcpy( s, buf );
}


/***************************************
 * remove non-alphanumericals from string
 ***************************************/

char *
fli_nuke_all_non_alnum( char * s )
{
    char *p = s,
		 *q = s + strlen( s ),
		 *b;
    char buf[ 1024 ];

    for ( b = buf; p < q; p++ )
        if ( isalnum( ( int ) *p ) )
			*b++ = *p;
    *b = '\0';
    return strcpy( s, buf );
}


#ifdef TEST
int main( void )
{
    char buf[ 100 ],
		 *p;

    while ( fgets( buf, 100, stdin ) )
	{
		buf[ 99 ] = '\0';
		if ( ( p = strchr( buf,'\n' ) ) )
			*p = '\0';
		fprintf( stderr, "^%s$\n", buf );
		fprintf( stderr, "^%s$\n", de_space_de( buf ) );
	}
}
#endif /* TEST */
