base/string.c

   1 /*
   2  * Copyright (c) 2010 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Portions Copyright (c) 2010 Apple Inc. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "baselocl.h"
  37 #include <string.h>
  38
  39 static void
  40 string_dealloc(void *ptr)
  41 {
  42 }
  43
  44 static int
  45 string_cmp(void *a, void *b)
  46 {
  47     return strcmp(a, b);
  48 }
  49
  50 static unsigned long
  51 string_hash(void *ptr)
  52 {
  53     const char *s = ptr;
  54     unsigned long n;
  55
  56     for (n = 0; *s; ++s)
  57         n += *s;
  58     return n;
  59 }
  60
  61 struct heim_type_data _heim_string_object = {
  62     HEIM_TID_STRING,
  63     "string-object",
  64     NULL,
  65     string_dealloc,
  66     NULL,
  67     string_cmp,
  68     string_hash
  69 };
  70
  71 /**
  72  * Create a string object
  73  *
  74  * @param string the string to create, must be an utf8 string
  75  *
  76  * @return string object
  77  */
  78
  79 heim_string_t
  80 heim_string_create(const char *string)
  81 {
  82     size_t len = strlen(string);
  83     heim_string_t s;
  84
  85     s = _heim_alloc_object(&_heim_string_object, len + 1);
  86     if (s)
  87         memcpy(s, string, len + 1);
  88     return s;
  89 }
  90
  91 /**
  92  * Return the type ID of string objects
  93  *
  94  * @return type id of string objects
  95  */
  96
  97 heim_tid_t
  98 heim_string_get_type_id(void)
  99 {
 100     return HEIM_TID_STRING;
 101 }
 102
 103 /**
 104  * Get the string value of the content.
 105  *
 106  * @param string the string object to get the value from
 107  *
 108  * @return a utf8 string
 109  */
 110
 111 const char *
 112 heim_string_get_utf8(heim_string_t string)
 113 {
 114     return (const char *)string;
 115 }