1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * $Id: strequal.c,v 1.40 2008-10-23 11:49:19 bagder Exp $
22 ***************************************************************************/
23
24 #include "setup.h"
25
26 #include <string.h>
27 #include <ctype.h>
28
29 #ifdef HAVE_STRINGS_H
30 #include <strings.h>
31 #endif
32
33 #include "strequal.h"
34
curl_strequal(const char * first,const char * second)35 int curl_strequal(const char *first, const char *second)
36 {
37 #if defined(HAVE_STRCASECMP)
38 return !(strcasecmp)(first, second);
39 #elif defined(HAVE_STRCMPI)
40 return !(strcmpi)(first, second);
41 #elif defined(HAVE_STRICMP)
42 return !(stricmp)(first, second);
43 #else
44 while(*first && *second) {
45 if(toupper(*first) != toupper(*second)) {
46 break;
47 }
48 first++;
49 second++;
50 }
51 return toupper(*first) == toupper(*second);
52 #endif
53 }
54
curl_strnequal(const char * first,const char * second,size_t max)55 int curl_strnequal(const char *first, const char *second, size_t max)
56 {
57 #if defined(HAVE_STRNCASECMP)
58 return !strncasecmp(first, second, max);
59 #elif defined(HAVE_STRNCMPI)
60 return !strncmpi(first, second, max);
61 #elif defined(HAVE_STRNICMP)
62 return !strnicmp(first, second, max);
63 #else
64 while(*first && *second && max) {
65 if(toupper(*first) != toupper(*second)) {
66 break;
67 }
68 max--;
69 first++;
70 second++;
71 }
72 if(0 == max)
73 return 1; /* they are equal this far */
74
75 return toupper(*first) == toupper(*second);
76 #endif
77 }
78
79 #ifndef HAVE_STRLCAT
80 /*
81 * The strlcat() function appends the NUL-terminated string src to the end
82 * of dst. It will append at most size - strlen(dst) - 1 bytes, NUL-termi-
83 * nating the result.
84 *
85 * The strlcpy() and strlcat() functions return the total length of the
86 * string they tried to create. For strlcpy() that means the length of src.
87 * For strlcat() that means the initial length of dst plus the length of
88 * src. While this may seem somewhat confusing it was done to make trunca-
89 * tion detection simple.
90 *
91 *
92 */
Curl_strlcat(char * dst,const char * src,size_t siz)93 size_t Curl_strlcat(char *dst, const char *src, size_t siz)
94 {
95 char *d = dst;
96 const char *s = src;
97 size_t n = siz;
98 size_t dlen;
99
100 /* Find the end of dst and adjust bytes left but don't go past end */
101 while(n-- != 0 && *d != '\0')
102 d++;
103 dlen = d - dst;
104 n = siz - dlen;
105
106 if(n == 0)
107 return(dlen + strlen(s));
108 while(*s != '\0') {
109 if(n != 1) {
110 *d++ = *s;
111 n--;
112 }
113 s++;
114 }
115 *d = '\0';
116
117 return(dlen + (s - src)); /* count does not include NUL */
118 }
119 #endif
120