1  /*
 2   * Copyright (c) 2008 Kungliga Tekniska Högskolan
 3   * (Royal Institute of Technology, Stockholm, Sweden).
 4   * All rights reserved.
 5   *
 6   * Redistribution and use in source and binary forms, with or without
 7   * modification, are permitted provided that the following conditions
 8   * are met:
 9   *
10   * 1. Redistributions of source code must retain the above copyright
11   *    notice, this list of conditions and the following disclaimer.
12   *
13   * 2. Redistributions in binary form must reproduce the above copyright
14   *    notice, this list of conditions and the following disclaimer in the
15   *    documentation and/or other materials provided with the distribution.
16   *
17   * 3. Neither the name of the Institute nor the names of its contributors
18   *    may be used to endorse or promote products derived from this software
19   *    without specific prior written permission.
20   *
21   * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24   * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31   * SUCH DAMAGE.
32   */
33  
34  #include "windlocl.h"
35  #include <assert.h>
36  
37  static int
38  put_char(uint32_t *out, size_t *o, uint32_t c, size_t out_len)
39  {
40      if (*o >= out_len)
41  	return 1;
42      out[*o] = c;
43      (*o)++;
44      return 0;
45  }
46  
47  int
48  _wind_ldap_case_exact_attribute(const uint32_t *tmp,
49  				size_t olen,
50  				uint32_t *out,
51  				size_t *out_len)
52  {
53      size_t o = 0, i = 0;
54  
55      if (olen == 0) {
56  	*out_len = 0;
57  	return 0;
58      }
59  
60      if (put_char(out, &o, 0x20, *out_len))
61  	return WIND_ERR_OVERRUN;
62      while(i < olen && tmp[i] == 0x20) /* skip initial spaces */
63  	i++;
64  
65      while (i < olen) {
66  	if (tmp[i] == 0x20) {
67  	    if (put_char(out, &o, 0x20, *out_len) ||
68  		put_char(out, &o, 0x20, *out_len))
69  		return WIND_ERR_OVERRUN;
70  	    while(i < olen && tmp[i] == 0x20) /* skip middle spaces */
71  		i++;
72  	} else {
73  	    if (put_char(out, &o, tmp[i++], *out_len))
74  		return WIND_ERR_OVERRUN;
75  	}
76      }
77      assert(o > 0);
78  
79      /* only one spaces at the end */
80      if (o == 1 && out[0] == 0x20)
81  	o = 0;
82      else if (out[o - 1] == 0x20) {
83  	if (out[o - 2] == 0x20)
84  	    o--;
85      } else
86  	put_char(out, &o, 0x20, *out_len);
87  
88      *out_len = o;
89  
90      return 0;
91  }