460b9539 |
1 | /* |
2 | * This file is part of DisOrder |
3 | * Copyright (C) 2004 Richard Kettlewell |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, but |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write to the Free Software |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
18 | * USA |
19 | */ |
20 | |
21 | #include <config.h> |
22 | #include "types.h" |
23 | |
24 | #include <string.h> |
25 | #include <stddef.h> |
26 | |
27 | #include "mem.h" |
28 | #include "vector.h" |
29 | #include "table.h" |
30 | #include "words.h" |
31 | #include "utf8.h" |
32 | |
33 | #include "casefold.h" |
34 | #include "unicodegc.h" |
35 | |
36 | const char *casefold(const char *ptr) { |
37 | struct dynstr d; |
38 | int l, r, m; |
39 | uint32_t c; |
40 | const struct cm *t; |
41 | const char *start, *s = ptr; |
42 | |
43 | dynstr_init(&d); |
44 | while(*s) { |
45 | start = s; |
46 | PARSE_UTF8(s, c, return ptr); |
47 | /* seek the folded equivalent */ |
48 | t = cm[c & CM_MASK]; |
49 | l = 0; |
50 | r = cmn[c & CM_MASK] - 1; |
51 | while(l <= r && c != t[m = (l + r) / 2].ch) |
52 | if(c < t[m].ch) |
53 | r = m - 1; |
54 | else |
55 | l = m + 1; |
56 | if(l <= r) |
57 | dynstr_append_string(&d, t[m].tr); |
58 | else |
59 | dynstr_append_bytes(&d, start, s - start); |
60 | } |
61 | dynstr_terminate(&d); |
62 | return d.vec; |
63 | } |
64 | |
65 | static enum unicode_gc_cat cat(uint32_t c) { |
66 | int l, r, m; |
67 | |
68 | l = 0; |
69 | r = sizeof gcs / sizeof *gcs; |
70 | while(l <= r) { |
71 | m = (l + r) / 2; |
72 | if(c < gcs[m].l) |
73 | r = m - 1; |
74 | else if(c > gcs[m].h) |
75 | l = m + 1; |
76 | else |
77 | return gcs[m].cat; |
78 | } |
79 | return unicode_gc_none; |
80 | } |
81 | |
82 | /* XXX this is a bit kludgy */ |
83 | |
84 | char **words(const char *s, int *nvecp) { |
85 | struct vector v; |
86 | struct dynstr d; |
87 | const char *start; |
88 | uint32_t c; |
89 | int in_word = 0; |
90 | |
91 | vector_init(&v); |
92 | while(*s) { |
93 | start = s; |
94 | PARSE_UTF8(s, c, return 0); |
95 | /* special cases first */ |
96 | switch(c) { |
97 | case '/': |
98 | case '.': |
99 | case '+': |
100 | case '&': |
101 | case ':': |
102 | case '_': |
103 | case '-': |
104 | goto separator; |
105 | } |
106 | /* do the rest on category */ |
107 | switch(cat(c)) { |
108 | case unicode_gc_Ll: |
109 | case unicode_gc_Lm: |
110 | case unicode_gc_Lo: |
111 | case unicode_gc_Lt: |
112 | case unicode_gc_Lu: |
113 | case unicode_gc_Nd: |
114 | case unicode_gc_Nl: |
115 | case unicode_gc_No: |
116 | case unicode_gc_Sc: |
117 | case unicode_gc_Sk: |
118 | case unicode_gc_Sm: |
119 | case unicode_gc_So: |
120 | /* letters, digits and symbols are considered to be part of |
121 | * words */ |
122 | if(!in_word) { |
123 | dynstr_init(&d); |
124 | in_word = 1; |
125 | } |
126 | dynstr_append_bytes(&d, start, s - start); |
127 | break; |
128 | |
129 | case unicode_gc_Cc: |
130 | case unicode_gc_Cf: |
131 | case unicode_gc_Co: |
132 | case unicode_gc_Cs: |
133 | case unicode_gc_Zl: |
134 | case unicode_gc_Zp: |
135 | case unicode_gc_Zs: |
136 | case unicode_gc_Pe: |
137 | case unicode_gc_Ps: |
138 | separator: |
139 | if(in_word) { |
140 | dynstr_terminate(&d); |
141 | vector_append(&v, d.vec); |
142 | in_word = 0; |
143 | } |
144 | break; |
145 | |
146 | case unicode_gc_Mc: |
147 | case unicode_gc_Me: |
148 | case unicode_gc_Mn: |
149 | case unicode_gc_Pc: |
150 | case unicode_gc_Pd: |
151 | case unicode_gc_Pf: |
152 | case unicode_gc_Pi: |
153 | case unicode_gc_Po: |
154 | case unicode_gc_none: |
155 | /* control and punctuation is completely ignored */ |
156 | break; |
157 | |
158 | } |
159 | } |
160 | if(in_word) { |
161 | /* pick up the final word */ |
162 | dynstr_terminate(&d); |
163 | vector_append(&v, d.vec); |
164 | } |
165 | vector_terminate(&v); |
166 | if(nvecp) |
167 | *nvecp = v.nvec; |
168 | return v.vec; |
169 | } |
170 | |
171 | /* |
172 | Local Variables: |
173 | c-basic-offset:2 |
174 | comment-column:40 |
175 | End: |
176 | */ |