1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2011, 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 ***************************************************************************/
22
23 #include "curl_setup.h"
24
25 #include "rawstr.h"
26
27 /* Portable, consistent toupper (remember EBCDIC). Do not use toupper() because
28 its behavior is altered by the current locale. */
Curl_raw_toupper(char in)29 char Curl_raw_toupper(char in)
30 {
31 switch (in) {
32 case 'a':
33 return 'A';
34 case 'b':
35 return 'B';
36 case 'c':
37 return 'C';
38 case 'd':
39 return 'D';
40 case 'e':
41 return 'E';
42 case 'f':
43 return 'F';
44 case 'g':
45 return 'G';
46 case 'h':
47 return 'H';
48 case 'i':
49 return 'I';
50 case 'j':
51 return 'J';
52 case 'k':
53 return 'K';
54 case 'l':
55 return 'L';
56 case 'm':
57 return 'M';
58 case 'n':
59 return 'N';
60 case 'o':
61 return 'O';
62 case 'p':
63 return 'P';
64 case 'q':
65 return 'Q';
66 case 'r':
67 return 'R';
68 case 's':
69 return 'S';
70 case 't':
71 return 'T';
72 case 'u':
73 return 'U';
74 case 'v':
75 return 'V';
76 case 'w':
77 return 'W';
78 case 'x':
79 return 'X';
80 case 'y':
81 return 'Y';
82 case 'z':
83 return 'Z';
84 }
85 return in;
86 }
87
88 /*
89 * Curl_raw_equal() is for doing "raw" case insensitive strings. This is meant
90 * to be locale independent and only compare strings we know are safe for
91 * this. See http://daniel.haxx.se/blog/2008/10/15/strcasecmp-in-turkish/ for
92 * some further explanation to why this function is necessary.
93 *
94 * The function is capable of comparing a-z case insensitively even for
95 * non-ascii.
96 */
97
Curl_raw_equal(const char * first,const char * second)98 int Curl_raw_equal(const char *first, const char *second)
99 {
100 while(*first && *second) {
101 if(Curl_raw_toupper(*first) != Curl_raw_toupper(*second))
102 /* get out of the loop as soon as they don't match */
103 break;
104 first++;
105 second++;
106 }
107 /* we do the comparison here (possibly again), just to make sure that if the
108 loop above is skipped because one of the strings reached zero, we must not
109 return this as a successful match */
110 return (Curl_raw_toupper(*first) == Curl_raw_toupper(*second));
111 }
112
Curl_raw_nequal(const char * first,const char * second,size_t max)113 int Curl_raw_nequal(const char *first, const char *second, size_t max)
114 {
115 while(*first && *second && max) {
116 if(Curl_raw_toupper(*first) != Curl_raw_toupper(*second)) {
117 break;
118 }
119 max--;
120 first++;
121 second++;
122 }
123 if(0 == max)
124 return 1; /* they are equal this far */
125
126 return Curl_raw_toupper(*first) == Curl_raw_toupper(*second);
127 }
128
129 /* Copy an upper case version of the string from src to dest. The
130 * strings may overlap. No more than n characters of the string are copied
131 * (including any NUL) and the destination string will NOT be
132 * NUL-terminated if that limit is reached.
133 */
Curl_strntoupper(char * dest,const char * src,size_t n)134 void Curl_strntoupper(char *dest, const char *src, size_t n)
135 {
136 if(n < 1)
137 return;
138
139 do {
140 *dest++ = Curl_raw_toupper(*src);
141 } while(*src++ && --n);
142 }
143