| 1 | /* Optimized case-insensitive string comparison in C locale.
|
|---|
| 2 | Copyright (C) 2001-2002, 2007, 2009-2012 Free Software Foundation, Inc.
|
|---|
| 3 |
|
|---|
| 4 | This program is free software: you can redistribute it and/or modify it
|
|---|
| 5 | under the terms of the GNU General Public License as published
|
|---|
| 6 | by the Free Software Foundation; either version 3 of the License, or
|
|---|
| 7 | (at your option) any later version.
|
|---|
| 8 |
|
|---|
| 9 | This program is distributed in the hope that it will be useful,
|
|---|
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|---|
| 12 | General Public License for more details.
|
|---|
| 13 |
|
|---|
| 14 | You should have received a copy of the GNU General Public License
|
|---|
| 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|---|
| 16 |
|
|---|
| 17 | /* Written by Bruno Haible <bruno@clisp.org>. */
|
|---|
| 18 |
|
|---|
| 19 | #include "c-strcase.h"
|
|---|
| 20 | #include "c-ctype.h"
|
|---|
| 21 |
|
|---|
| 22 | /* STRCASEEQ allows to optimize string comparison with a small literal string.
|
|---|
| 23 | STRCASEEQ (s, "UTF-8", 'U','T','F','-','8',0,0,0,0)
|
|---|
| 24 | is semantically equivalent to
|
|---|
| 25 | c_strcasecmp (s, "UTF-8") == 0
|
|---|
| 26 | just faster. */
|
|---|
| 27 |
|
|---|
| 28 | /* Help GCC to generate good code for string comparisons with
|
|---|
| 29 | immediate strings. */
|
|---|
| 30 | #if defined (__GNUC__) && defined (__OPTIMIZE__)
|
|---|
| 31 |
|
|---|
| 32 | /* Case insensitive comparison of ASCII characters. */
|
|---|
| 33 | # if C_CTYPE_ASCII
|
|---|
| 34 | # define CASEEQ(other,upper) \
|
|---|
| 35 | (c_isupper (upper) ? ((other) & ~0x20) == (upper) : (other) == (upper))
|
|---|
| 36 | # elif C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
|
|---|
| 37 | # define CASEEQ(other,upper) \
|
|---|
| 38 | (c_isupper (upper) ? (other) == (upper) || (other) == (upper) - 'A' + 'a' : (other) == (upper))
|
|---|
| 39 | # else
|
|---|
| 40 | # define CASEEQ(other,upper) \
|
|---|
| 41 | (c_toupper (other) == (upper))
|
|---|
| 42 | # endif
|
|---|
| 43 |
|
|---|
| 44 | static inline int
|
|---|
| 45 | strcaseeq9 (const char *s1, const char *s2)
|
|---|
| 46 | {
|
|---|
| 47 | return c_strcasecmp (s1 + 9, s2 + 9) == 0;
|
|---|
| 48 | }
|
|---|
| 49 |
|
|---|
| 50 | static inline int
|
|---|
| 51 | strcaseeq8 (const char *s1, const char *s2, char s28)
|
|---|
| 52 | {
|
|---|
| 53 | if (CASEEQ (s1[8], s28))
|
|---|
| 54 | {
|
|---|
| 55 | if (s28 == 0)
|
|---|
| 56 | return 1;
|
|---|
| 57 | else
|
|---|
| 58 | return strcaseeq9 (s1, s2);
|
|---|
| 59 | }
|
|---|
| 60 | else
|
|---|
| 61 | return 0;
|
|---|
| 62 | }
|
|---|
| 63 |
|
|---|
| 64 | static inline int
|
|---|
| 65 | strcaseeq7 (const char *s1, const char *s2, char s27, char s28)
|
|---|
| 66 | {
|
|---|
| 67 | if (CASEEQ (s1[7], s27))
|
|---|
| 68 | {
|
|---|
| 69 | if (s27 == 0)
|
|---|
| 70 | return 1;
|
|---|
| 71 | else
|
|---|
| 72 | return strcaseeq8 (s1, s2, s28);
|
|---|
| 73 | }
|
|---|
| 74 | else
|
|---|
| 75 | return 0;
|
|---|
| 76 | }
|
|---|
| 77 |
|
|---|
| 78 | static inline int
|
|---|
| 79 | strcaseeq6 (const char *s1, const char *s2, char s26, char s27, char s28)
|
|---|
| 80 | {
|
|---|
| 81 | if (CASEEQ (s1[6], s26))
|
|---|
| 82 | {
|
|---|
| 83 | if (s26 == 0)
|
|---|
| 84 | return 1;
|
|---|
| 85 | else
|
|---|
| 86 | return strcaseeq7 (s1, s2, s27, s28);
|
|---|
| 87 | }
|
|---|
| 88 | else
|
|---|
| 89 | return 0;
|
|---|
| 90 | }
|
|---|
| 91 |
|
|---|
| 92 | static inline int
|
|---|
| 93 | strcaseeq5 (const char *s1, const char *s2, char s25, char s26, char s27, char s28)
|
|---|
| 94 | {
|
|---|
| 95 | if (CASEEQ (s1[5], s25))
|
|---|
| 96 | {
|
|---|
| 97 | if (s25 == 0)
|
|---|
| 98 | return 1;
|
|---|
| 99 | else
|
|---|
| 100 | return strcaseeq6 (s1, s2, s26, s27, s28);
|
|---|
| 101 | }
|
|---|
| 102 | else
|
|---|
| 103 | return 0;
|
|---|
| 104 | }
|
|---|
| 105 |
|
|---|
| 106 | static inline int
|
|---|
| 107 | strcaseeq4 (const char *s1, const char *s2, char s24, char s25, char s26, char s27, char s28)
|
|---|
| 108 | {
|
|---|
| 109 | if (CASEEQ (s1[4], s24))
|
|---|
| 110 | {
|
|---|
| 111 | if (s24 == 0)
|
|---|
| 112 | return 1;
|
|---|
| 113 | else
|
|---|
| 114 | return strcaseeq5 (s1, s2, s25, s26, s27, s28);
|
|---|
| 115 | }
|
|---|
| 116 | else
|
|---|
| 117 | return 0;
|
|---|
| 118 | }
|
|---|
| 119 |
|
|---|
| 120 | static inline int
|
|---|
| 121 | strcaseeq3 (const char *s1, const char *s2, char s23, char s24, char s25, char s26, char s27, char s28)
|
|---|
| 122 | {
|
|---|
| 123 | if (CASEEQ (s1[3], s23))
|
|---|
| 124 | {
|
|---|
| 125 | if (s23 == 0)
|
|---|
| 126 | return 1;
|
|---|
| 127 | else
|
|---|
| 128 | return strcaseeq4 (s1, s2, s24, s25, s26, s27, s28);
|
|---|
| 129 | }
|
|---|
| 130 | else
|
|---|
| 131 | return 0;
|
|---|
| 132 | }
|
|---|
| 133 |
|
|---|
| 134 | static inline int
|
|---|
| 135 | strcaseeq2 (const char *s1, const char *s2, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
|
|---|
| 136 | {
|
|---|
| 137 | if (CASEEQ (s1[2], s22))
|
|---|
| 138 | {
|
|---|
| 139 | if (s22 == 0)
|
|---|
| 140 | return 1;
|
|---|
| 141 | else
|
|---|
| 142 | return strcaseeq3 (s1, s2, s23, s24, s25, s26, s27, s28);
|
|---|
| 143 | }
|
|---|
| 144 | else
|
|---|
| 145 | return 0;
|
|---|
| 146 | }
|
|---|
| 147 |
|
|---|
| 148 | static inline int
|
|---|
| 149 | strcaseeq1 (const char *s1, const char *s2, char s21, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
|
|---|
| 150 | {
|
|---|
| 151 | if (CASEEQ (s1[1], s21))
|
|---|
| 152 | {
|
|---|
| 153 | if (s21 == 0)
|
|---|
| 154 | return 1;
|
|---|
| 155 | else
|
|---|
| 156 | return strcaseeq2 (s1, s2, s22, s23, s24, s25, s26, s27, s28);
|
|---|
| 157 | }
|
|---|
| 158 | else
|
|---|
| 159 | return 0;
|
|---|
| 160 | }
|
|---|
| 161 |
|
|---|
| 162 | static inline int
|
|---|
| 163 | strcaseeq0 (const char *s1, const char *s2, char s20, char s21, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
|
|---|
| 164 | {
|
|---|
| 165 | if (CASEEQ (s1[0], s20))
|
|---|
| 166 | {
|
|---|
| 167 | if (s20 == 0)
|
|---|
| 168 | return 1;
|
|---|
| 169 | else
|
|---|
| 170 | return strcaseeq1 (s1, s2, s21, s22, s23, s24, s25, s26, s27, s28);
|
|---|
| 171 | }
|
|---|
| 172 | else
|
|---|
| 173 | return 0;
|
|---|
| 174 | }
|
|---|
| 175 |
|
|---|
| 176 | #define STRCASEEQ(s1,s2,s20,s21,s22,s23,s24,s25,s26,s27,s28) \
|
|---|
| 177 | strcaseeq0 (s1, s2, s20, s21, s22, s23, s24, s25, s26, s27, s28)
|
|---|
| 178 |
|
|---|
| 179 | #else
|
|---|
| 180 |
|
|---|
| 181 | #define STRCASEEQ(s1,s2,s20,s21,s22,s23,s24,s25,s26,s27,s28) \
|
|---|
| 182 | (c_strcasecmp (s1, s2) == 0)
|
|---|
| 183 |
|
|---|
| 184 | #endif
|
|---|