Commit | Line | Data |
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f2c9fcb0 | 1 | /* Copyright (C) 1995, 1996, 1999, 2000 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
73be1d9e MV |
8 | * This library is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
16 | */ | |
6e8d25a6 | 17 | |
0f2d19dd JB |
18 | \f |
19 | ||
a0599745 MD |
20 | #include "libguile/_scm.h" |
21 | #include "libguile/chars.h" | |
a002f1a2 DH |
22 | #include "libguile/strings.h" |
23 | #include "libguile/symbols.h" | |
0f2d19dd | 24 | |
a0599745 MD |
25 | #include "libguile/validate.h" |
26 | #include "libguile/strorder.h" | |
0f2d19dd JB |
27 | \f |
28 | ||
c3ee7520 | 29 | SCM_DEFINE1 (scm_string_equal_p, "string=?", scm_tc7_rpsubr, |
6e8d25a6 | 30 | (SCM s1, SCM s2), |
1e6808ea MG |
31 | "Lexicographic equality predicate; return @code{#t} if the two\n" |
32 | "strings are the same length and contain the same characters in\n" | |
33 | "the same positions, otherwise return @code{#f}.\n" | |
34 | "\n" | |
35 | "The procedure @code{string-ci=?} treats upper and lower case\n" | |
36 | "letters as though they were the same character, but\n" | |
37 | "@code{string=?} treats upper and lower case as distinct\n" | |
38 | "characters.") | |
6e8d25a6 | 39 | #define FUNC_NAME s_scm_string_equal_p |
0f2d19dd | 40 | { |
1be6b49c | 41 | size_t length; |
0f2d19dd | 42 | |
e9bfab50 DH |
43 | SCM_VALIDATE_STRING (1, s1); |
44 | SCM_VALIDATE_STRING (2, s2); | |
45 | ||
46 | length = SCM_STRING_LENGTH (s2); | |
47 | if (SCM_STRING_LENGTH (s1) == length) | |
0f2d19dd | 48 | { |
34f0f2b8 DH |
49 | unsigned char *c1 = SCM_STRING_UCHARS (s1) + length - 1; |
50 | unsigned char *c2 = SCM_STRING_UCHARS (s2) + length - 1; | |
1be6b49c | 51 | size_t i; |
e9bfab50 DH |
52 | |
53 | /* comparing from back to front typically finds mismatches faster */ | |
54 | for (i = 0; i != length; ++i, --c1, --c2) | |
55 | if (*c1 != *c2) | |
56 | return SCM_BOOL_F; | |
57 | ||
58 | return SCM_BOOL_T; | |
0f2d19dd | 59 | } |
e9bfab50 DH |
60 | else |
61 | { | |
0f2d19dd | 62 | return SCM_BOOL_F; |
e9bfab50 | 63 | } |
0f2d19dd | 64 | } |
6e8d25a6 | 65 | #undef FUNC_NAME |
0f2d19dd | 66 | |
e9bfab50 | 67 | |
c3ee7520 | 68 | SCM_DEFINE1 (scm_string_ci_equal_p, "string-ci=?", scm_tc7_rpsubr, |
6e8d25a6 | 69 | (SCM s1, SCM s2), |
1e6808ea MG |
70 | "Case-insensitive string equality predicate; return @code{#t} if\n" |
71 | "the two strings are the same length and their component\n" | |
72 | "characters match (ignoring case) at each position; otherwise\n" | |
73 | "return @code{#f}.") | |
6e8d25a6 | 74 | #define FUNC_NAME s_scm_string_ci_equal_p |
0f2d19dd | 75 | { |
1be6b49c | 76 | size_t length; |
6e8d25a6 | 77 | |
e9bfab50 DH |
78 | SCM_VALIDATE_STRING (1, s1); |
79 | SCM_VALIDATE_STRING (2, s2); | |
80 | ||
81 | length = SCM_STRING_LENGTH (s2); | |
82 | if (SCM_STRING_LENGTH (s1) == length) | |
0f2d19dd | 83 | { |
34f0f2b8 DH |
84 | unsigned char *c1 = SCM_STRING_UCHARS (s1) + length - 1; |
85 | unsigned char *c2 = SCM_STRING_UCHARS (s2) + length - 1; | |
1be6b49c | 86 | size_t i; |
e9bfab50 DH |
87 | |
88 | /* comparing from back to front typically finds mismatches faster */ | |
89 | for (i = 0; i != length; ++i, --c1, --c2) | |
90 | if (scm_upcase (*c1) != scm_upcase (*c2)) | |
91 | return SCM_BOOL_F; | |
92 | ||
93 | return SCM_BOOL_T; | |
0f2d19dd | 94 | } |
e9bfab50 DH |
95 | else |
96 | { | |
0f2d19dd | 97 | return SCM_BOOL_F; |
e9bfab50 | 98 | } |
0f2d19dd | 99 | } |
6e8d25a6 | 100 | #undef FUNC_NAME |
0f2d19dd | 101 | |
e9bfab50 | 102 | |
3ba5a6c2 DH |
103 | /* Helper function for the lexicographic ordering predicates. |
104 | * No argument checking is performed. */ | |
105 | static SCM | |
106 | string_less_p (SCM s1, SCM s2) | |
0f2d19dd | 107 | { |
1be6b49c | 108 | size_t i, length1, length2, lengthm; |
e9bfab50 DH |
109 | unsigned char *c1, *c2; |
110 | ||
e9bfab50 DH |
111 | length1 = SCM_STRING_LENGTH (s1); |
112 | length2 = SCM_STRING_LENGTH (s2); | |
113 | lengthm = min (length1, length2); | |
34f0f2b8 DH |
114 | c1 = SCM_STRING_UCHARS (s1); |
115 | c2 = SCM_STRING_UCHARS (s2); | |
0f2d19dd | 116 | |
e9bfab50 DH |
117 | for (i = 0; i != lengthm; ++i, ++c1, ++c2) { |
118 | int c = *c1 - *c2; | |
119 | if (c < 0) return SCM_BOOL_T; | |
120 | if (c > 0) return SCM_BOOL_F; | |
0f2d19dd | 121 | } |
e9bfab50 DH |
122 | |
123 | return SCM_BOOL (length1 < length2); | |
0f2d19dd | 124 | } |
3ba5a6c2 DH |
125 | |
126 | ||
127 | SCM_DEFINE1 (scm_string_less_p, "string<?", scm_tc7_rpsubr, | |
128 | (SCM s1, SCM s2), | |
1e6808ea MG |
129 | "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n" |
130 | "is lexicographically less than @var{s2}.") | |
3ba5a6c2 DH |
131 | #define FUNC_NAME s_scm_string_less_p |
132 | { | |
133 | SCM_VALIDATE_STRING (1, s1); | |
134 | SCM_VALIDATE_STRING (2, s2); | |
135 | ||
136 | return string_less_p (s1, s2); | |
137 | } | |
6e8d25a6 | 138 | #undef FUNC_NAME |
0f2d19dd | 139 | |
e9bfab50 | 140 | |
c3ee7520 | 141 | SCM_DEFINE1 (scm_string_leq_p, "string<=?", scm_tc7_rpsubr, |
6e8d25a6 | 142 | (SCM s1, SCM s2), |
1e6808ea MG |
143 | "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n" |
144 | "is lexicographically less than or equal to @var{s2}.") | |
6e8d25a6 | 145 | #define FUNC_NAME s_scm_string_leq_p |
0f2d19dd | 146 | { |
3ba5a6c2 DH |
147 | SCM_VALIDATE_STRING (1, s1); |
148 | SCM_VALIDATE_STRING (2, s2); | |
149 | ||
150 | return SCM_BOOL_NOT (string_less_p (s2, s1)); | |
0f2d19dd | 151 | } |
6e8d25a6 | 152 | #undef FUNC_NAME |
0f2d19dd | 153 | |
e9bfab50 | 154 | |
c3ee7520 | 155 | SCM_DEFINE1 (scm_string_gr_p, "string>?", scm_tc7_rpsubr, |
6e8d25a6 | 156 | (SCM s1, SCM s2), |
1e6808ea MG |
157 | "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n" |
158 | "is lexicographically greater than @var{s2}.") | |
6e8d25a6 | 159 | #define FUNC_NAME s_scm_string_gr_p |
0f2d19dd | 160 | { |
3ba5a6c2 DH |
161 | SCM_VALIDATE_STRING (1, s1); |
162 | SCM_VALIDATE_STRING (2, s2); | |
163 | ||
164 | return string_less_p (s2, s1); | |
0f2d19dd | 165 | } |
6e8d25a6 | 166 | #undef FUNC_NAME |
0f2d19dd | 167 | |
e9bfab50 | 168 | |
c3ee7520 | 169 | SCM_DEFINE1 (scm_string_geq_p, "string>=?", scm_tc7_rpsubr, |
6e8d25a6 | 170 | (SCM s1, SCM s2), |
1e6808ea MG |
171 | "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n" |
172 | "is lexicographically greater than or equal to @var{s2}.") | |
6e8d25a6 | 173 | #define FUNC_NAME s_scm_string_geq_p |
0f2d19dd | 174 | { |
3ba5a6c2 DH |
175 | SCM_VALIDATE_STRING (1, s1); |
176 | SCM_VALIDATE_STRING (2, s2); | |
177 | ||
178 | return SCM_BOOL_NOT (string_less_p (s1, s2)); | |
0f2d19dd | 179 | } |
6e8d25a6 | 180 | #undef FUNC_NAME |
0f2d19dd | 181 | |
e9bfab50 | 182 | |
3ba5a6c2 DH |
183 | /* Helper function for the case insensitive lexicographic ordering |
184 | * predicates. No argument checking is performed. */ | |
185 | static SCM | |
186 | string_ci_less_p (SCM s1, SCM s2) | |
0f2d19dd | 187 | { |
1be6b49c | 188 | size_t i, length1, length2, lengthm; |
e9bfab50 DH |
189 | unsigned char *c1, *c2; |
190 | ||
e9bfab50 DH |
191 | length1 = SCM_STRING_LENGTH (s1); |
192 | length2 = SCM_STRING_LENGTH (s2); | |
193 | lengthm = min (length1, length2); | |
34f0f2b8 DH |
194 | c1 = SCM_STRING_UCHARS (s1); |
195 | c2 = SCM_STRING_UCHARS (s2); | |
e9bfab50 DH |
196 | |
197 | for (i = 0; i != lengthm; ++i, ++c1, ++c2) { | |
198 | int c = scm_upcase (*c1) - scm_upcase (*c2); | |
199 | if (c < 0) return SCM_BOOL_T; | |
200 | if (c > 0) return SCM_BOOL_F; | |
0f2d19dd | 201 | } |
e9bfab50 DH |
202 | |
203 | return SCM_BOOL (length1 < length2); | |
0f2d19dd | 204 | } |
3ba5a6c2 DH |
205 | |
206 | ||
207 | SCM_DEFINE1 (scm_string_ci_less_p, "string-ci<?", scm_tc7_rpsubr, | |
208 | (SCM s1, SCM s2), | |
1e6808ea MG |
209 | "Case insensitive lexicographic ordering predicate; return\n" |
210 | "@code{#t} if @var{s1} is lexicographically less than @var{s2}\n" | |
211 | "regardless of case.") | |
3ba5a6c2 DH |
212 | #define FUNC_NAME s_scm_string_ci_less_p |
213 | { | |
214 | SCM_VALIDATE_STRING (1, s1); | |
215 | SCM_VALIDATE_STRING (2, s2); | |
216 | ||
217 | return string_ci_less_p (s1, s2); | |
218 | } | |
6e8d25a6 | 219 | #undef FUNC_NAME |
0f2d19dd | 220 | |
e9bfab50 | 221 | |
c3ee7520 | 222 | SCM_DEFINE1 (scm_string_ci_leq_p, "string-ci<=?", scm_tc7_rpsubr, |
6e8d25a6 | 223 | (SCM s1, SCM s2), |
1e6808ea MG |
224 | "Case insensitive lexicographic ordering predicate; return\n" |
225 | "@code{#t} if @var{s1} is lexicographically less than or equal\n" | |
226 | "to @var{s2} regardless of case.") | |
6e8d25a6 | 227 | #define FUNC_NAME s_scm_string_ci_leq_p |
0f2d19dd | 228 | { |
3ba5a6c2 DH |
229 | SCM_VALIDATE_STRING (1, s1); |
230 | SCM_VALIDATE_STRING (2, s2); | |
231 | ||
232 | return SCM_BOOL_NOT (string_ci_less_p (s2, s1)); | |
0f2d19dd | 233 | } |
6e8d25a6 | 234 | #undef FUNC_NAME |
0f2d19dd | 235 | |
e9bfab50 | 236 | |
c3ee7520 | 237 | SCM_DEFINE1 (scm_string_ci_gr_p, "string-ci>?", scm_tc7_rpsubr, |
6e8d25a6 | 238 | (SCM s1, SCM s2), |
1e6808ea MG |
239 | "Case insensitive lexicographic ordering predicate; return\n" |
240 | "@code{#t} if @var{s1} is lexicographically greater than\n" | |
241 | "@var{s2} regardless of case.") | |
6e8d25a6 | 242 | #define FUNC_NAME s_scm_string_ci_gr_p |
0f2d19dd | 243 | { |
3ba5a6c2 DH |
244 | SCM_VALIDATE_STRING (1, s1); |
245 | SCM_VALIDATE_STRING (2, s2); | |
246 | ||
247 | return string_ci_less_p (s2, s1); | |
0f2d19dd | 248 | } |
6e8d25a6 | 249 | #undef FUNC_NAME |
0f2d19dd | 250 | |
e9bfab50 | 251 | |
c3ee7520 | 252 | SCM_DEFINE1 (scm_string_ci_geq_p, "string-ci>=?", scm_tc7_rpsubr, |
6e8d25a6 | 253 | (SCM s1, SCM s2), |
1e6808ea MG |
254 | "Case insensitive lexicographic ordering predicate; return\n" |
255 | "@code{#t} if @var{s1} is lexicographically greater than or\n" | |
256 | "equal to @var{s2} regardless of case.") | |
6e8d25a6 | 257 | #define FUNC_NAME s_scm_string_ci_geq_p |
0f2d19dd | 258 | { |
3ba5a6c2 DH |
259 | SCM_VALIDATE_STRING (1, s1); |
260 | SCM_VALIDATE_STRING (2, s2); | |
261 | ||
262 | return SCM_BOOL_NOT (string_ci_less_p (s1, s2)); | |
0f2d19dd | 263 | } |
6e8d25a6 | 264 | #undef FUNC_NAME |
0f2d19dd JB |
265 | |
266 | \f | |
1cc91f1b | 267 | |
0f2d19dd JB |
268 | void |
269 | scm_init_strorder () | |
0f2d19dd | 270 | { |
a0599745 | 271 | #include "libguile/strorder.x" |
0f2d19dd JB |
272 | } |
273 | ||
89e00824 ML |
274 | |
275 | /* | |
276 | Local Variables: | |
277 | c-file-style: "gnu" | |
278 | End: | |
279 | */ |