common/smbsrv/smb_string.c

	smb_string.c revision da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Implementation of some of the string functions.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#ifdef _KERNEL
#include <sys/types.h>
#include <sys/sunddi.h>
#else
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#endif
#include <smbsrv/alloc.h>
#include <smbsrv/string.h>
#include <smbsrv/ctype.h>


/*
 * strsubst
 *
 * Scan a string replacing all occurrences of orgchar with newchar.
 * Returns a pointer to s, or null of s is null.
 */
char *
strsubst(char *s, char orgchar, char newchar)
{
    char *p = s;

    if (p == 0)
        return (0);

    while (*p) {
        if (*p == orgchar)
            *p = newchar;
        ++p;
    }

    return (s);
}

/*
 * strcanon
 *
 * Normalize a string by reducing all the repeated characters in
 * buf as defined by class. For example;
 *
 *      char *buf = strdup("/d1//d2//d3\\\\d4\\\\f1.txt");
 *      strcanon(buf, "/\\");
 *
 * Would result in buf containing the following string:
 *
 *      /d1/d2/d3\d4\f1.txt
 *
 * This function modifies the contents of buf in place and returns
 * a pointer to buf.
 */
char *
strcanon(char *buf, const char *class)
{
    char *p = buf;
    char *q = buf;
    char *r;

    while (*p) {
        *q++ = *p;

        if ((r = strchr(class, *p)) != 0) {
            while (*p == *r)
                ++p;
        } else
            ++p;
    }

    *q = '\0';
    return (buf);
}