nsprpub/lib/libc/src/strcase.c@a63d609f5ebe
nsprpub/lib/libc/src/strcase.c
Thu, 15 Jan 2015 15:55:04 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:55:04 +0100
- branch
- TOR_BUG_9701
- changeset 9
- a63d609f5ebe
- permissions
- -rw-r--r--
Back out 97036ab72558 which inappropriately compared turds to third parties.
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 #include "plstr.h"
7 #include <string.h>
9 static const unsigned char uc[] =
10 {
11 '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
12 '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
13 '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
14 '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
15 ' ', '!', '"', '#', '$', '%', '&', '\'',
16 '(', ')', '*', '+', ',', '-', '.', '/',
17 '0', '1', '2', '3', '4', '5', '6', '7',
18 '8', '9', ':', ';', '<', '=', '>', '?',
19 '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
20 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
21 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
22 'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
23 '`', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
24 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
25 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
26 'X', 'Y', 'Z', '{', '|', '}', '~', '\177',
27 0200, 0201, 0202, 0203, 0204, 0205, 0206, 0207,
28 0210, 0211, 0212, 0213, 0214, 0215, 0216, 0217,
29 0220, 0221, 0222, 0223, 0224, 0225, 0226, 0227,
30 0230, 0231, 0232, 0233, 0234, 0235, 0236, 0237,
31 0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247,
32 0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257,
33 0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267,
34 0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277,
35 0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307,
36 0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317,
37 0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327,
38 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337,
39 0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347,
40 0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357,
41 0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367,
42 0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377
43 };
45 PR_IMPLEMENT(PRIntn)
46 PL_strcasecmp(const char *a, const char *b)
47 {
48 const unsigned char *ua = (const unsigned char *)a;
49 const unsigned char *ub = (const unsigned char *)b;
51 if( ((const char *)0 == a) || (const char *)0 == b )
52 return (PRIntn)(a-b);
54 while( (uc[*ua] == uc[*ub]) && ('\0' != *a) )
55 {
56 a++;
57 ua++;
58 ub++;
59 }
61 return (PRIntn)(uc[*ua] - uc[*ub]);
62 }
64 PR_IMPLEMENT(PRIntn)
65 PL_strncasecmp(const char *a, const char *b, PRUint32 max)
66 {
67 const unsigned char *ua = (const unsigned char *)a;
68 const unsigned char *ub = (const unsigned char *)b;
70 if( ((const char *)0 == a) || (const char *)0 == b )
71 return (PRIntn)(a-b);
73 while( max && (uc[*ua] == uc[*ub]) && ('\0' != *a) )
74 {
75 a++;
76 ua++;
77 ub++;
78 max--;
79 }
81 if( 0 == max ) return (PRIntn)0;
83 return (PRIntn)(uc[*ua] - uc[*ub]);
84 }
86 PR_IMPLEMENT(char *)
87 PL_strcasestr(const char *big, const char *little)
88 {
89 PRUint32 ll;
91 if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
92 if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
94 ll = strlen(little);
96 for( ; *big; big++ )
97 /* obvious improvement available here */
98 if( 0 == PL_strncasecmp(big, little, ll) )
99 return (char *)big;
101 return (char *)0;
102 }
104 PR_IMPLEMENT(char *)
105 PL_strcaserstr(const char *big, const char *little)
106 {
107 const char *p;
108 PRUint32 bl, ll;
110 if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
111 if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
113 bl = strlen(big);
114 ll = strlen(little);
115 if( bl < ll ) return (char *)0;
116 p = &big[ bl - ll ];
118 for( ; p >= big; p-- )
119 /* obvious improvement available here */
120 if( 0 == PL_strncasecmp(p, little, ll) )
121 return (char *)p;
123 return (char *)0;
124 }
126 PR_IMPLEMENT(char *)
127 PL_strncasestr(const char *big, const char *little, PRUint32 max)
128 {
129 PRUint32 ll;
131 if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
132 if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
134 ll = strlen(little);
135 if( ll > max ) return (char *)0;
136 max -= ll;
137 max++;
139 for( ; max && *big; big++, max-- )
140 /* obvious improvement available here */
141 if( 0 == PL_strncasecmp(big, little, ll) )
142 return (char *)big;
144 return (char *)0;
145 }
147 PR_IMPLEMENT(char *)
148 PL_strncaserstr(const char *big, const char *little, PRUint32 max)
149 {
150 const char *p;
151 PRUint32 ll;
153 if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
154 if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
156 ll = strlen(little);
158 for( p = big; max && *p; p++, max-- )
159 ;
161 p -= ll;
162 if( p < big ) return (char *)0;
164 for( ; p >= big; p-- )
165 /* obvious improvement available here */
166 if( 0 == PL_strncasecmp(p, little, ll) )
167 return (char *)p;
169 return (char *)0;
170 }
