samba-mirror/source4/heimdal/base/string.c

/*
 * Copyright (c) 2010 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 *
 * Portions Copyright (c) 2010 Apple Inc. 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.
 *
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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.
 */

#include "baselocl.h"
#include <string.h>

static void
string_dealloc(void *ptr)
{
}

static int
string_cmp(void *a, void *b)
{
    return strcmp(a, b);
}

static unsigned long
string_hash(void *ptr)
{
    const char *s = ptr;
    unsigned long n;

    for (n = 0; *s; ++s)
	n += *s;
    return n;
}

struct heim_type_data _heim_string_object = {
    HEIM_TID_STRING,
    "string-object",
    NULL,
    string_dealloc,
    NULL,
    string_cmp,
    string_hash
};

/**
 * Create a string object
 *
 * @param string the string to create, must be an utf8 string
 *
 * @return string object
 */

heim_string_t
heim_string_create(const char *string)
{
    size_t len = strlen(string);
    heim_string_t s;

    s = _heim_alloc_object(&_heim_string_object, len + 1);
    if (s)
	memcpy(s, string, len + 1);
    return s;
}

/**
 * Return the type ID of string objects
 *
 * @return type id of string objects
 */

heim_tid_t
heim_string_get_type_id(void)
{
    return HEIM_TID_STRING;
}

/**
 * Get the string value of the content.
 *
 * @param string the string object to get the value from
 *
 * @return a utf8 string
 */

const char *
heim_string_get_utf8(heim_string_t string)
{
    return (const char *)string;
}