1 /* $OpenBSD: utf8.c,v 1.3 2009/06/25 06:15:04 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 21 #include <string.h> 22 23 #include "tmux.h" 24 25 struct utf8_width_entry { 26 u_int first; 27 u_int last; 28 29 int width; 30 31 struct utf8_width_entry *left; 32 struct utf8_width_entry *right; 33 }; 34 35 /* Random order. Not optimal but it'll do for now... */ 36 struct utf8_width_entry utf8_width_table[] = { 37 { 0x00951, 0x00954, 0, NULL, NULL }, 38 { 0x00ccc, 0x00ccd, 0, NULL, NULL }, 39 { 0x0fff9, 0x0fffb, 0, NULL, NULL }, 40 { 0x20000, 0x2fffd, 2, NULL, NULL }, 41 { 0x00ebb, 0x00ebc, 0, NULL, NULL }, 42 { 0x01932, 0x01932, 0, NULL, NULL }, 43 { 0x0070f, 0x0070f, 0, NULL, NULL }, 44 { 0x00a70, 0x00a71, 0, NULL, NULL }, 45 { 0x02329, 0x02329, 2, NULL, NULL }, 46 { 0x00acd, 0x00acd, 0, NULL, NULL }, 47 { 0x00ac7, 0x00ac8, 0, NULL, NULL }, 48 { 0x00a3c, 0x00a3c, 0, NULL, NULL }, 49 { 0x009cd, 0x009cd, 0, NULL, NULL }, 50 { 0x00591, 0x005bd, 0, NULL, NULL }, 51 { 0x01058, 0x01059, 0, NULL, NULL }, 52 { 0x0ffe0, 0x0ffe6, 2, NULL, NULL }, 53 { 0x01100, 0x0115f, 2, NULL, NULL }, 54 { 0x0fe20, 0x0fe23, 0, NULL, NULL }, 55 { 0x0302a, 0x0302f, 0, NULL, NULL }, 56 { 0x01772, 0x01773, 0, NULL, NULL }, 57 { 0x005bf, 0x005bf, 0, NULL, NULL }, 58 { 0x006ea, 0x006ed, 0, NULL, NULL }, 59 { 0x00bc0, 0x00bc0, 0, NULL, NULL }, 60 { 0x00962, 0x00963, 0, NULL, NULL }, 61 { 0x01732, 0x01734, 0, NULL, NULL }, 62 { 0x00d41, 0x00d43, 0, NULL, NULL }, 63 { 0x01b42, 0x01b42, 0, NULL, NULL }, 64 { 0x00a41, 0x00a42, 0, NULL, NULL }, 65 { 0x00eb4, 0x00eb9, 0, NULL, NULL }, 66 { 0x00b01, 0x00b01, 0, NULL, NULL }, 67 { 0x00e34, 0x00e3a, 0, NULL, NULL }, 68 { 0x03040, 0x03098, 2, NULL, NULL }, 69 { 0x0093c, 0x0093c, 0, NULL, NULL }, 70 { 0x00c4a, 0x00c4d, 0, NULL, NULL }, 71 { 0x01032, 0x01032, 0, NULL, NULL }, 72 { 0x00f37, 0x00f37, 0, NULL, NULL }, 73 { 0x00901, 0x00902, 0, NULL, NULL }, 74 { 0x00cbf, 0x00cbf, 0, NULL, NULL }, 75 { 0x0a806, 0x0a806, 0, NULL, NULL }, 76 { 0x00dd2, 0x00dd4, 0, NULL, NULL }, 77 { 0x00f71, 0x00f7e, 0, NULL, NULL }, 78 { 0x01752, 0x01753, 0, NULL, NULL }, 79 { 0x1d242, 0x1d244, 0, NULL, NULL }, 80 { 0x005c1, 0x005c2, 0, NULL, NULL }, 81 { 0x0309b, 0x0a4cf, 2, NULL, NULL }, 82 { 0xe0100, 0xe01ef, 0, NULL, NULL }, 83 { 0x017dd, 0x017dd, 0, NULL, NULL }, 84 { 0x00600, 0x00603, 0, NULL, NULL }, 85 { 0x009e2, 0x009e3, 0, NULL, NULL }, 86 { 0x00cc6, 0x00cc6, 0, NULL, NULL }, 87 { 0x0a80b, 0x0a80b, 0, NULL, NULL }, 88 { 0x01712, 0x01714, 0, NULL, NULL }, 89 { 0x00b3c, 0x00b3c, 0, NULL, NULL }, 90 { 0x01b00, 0x01b03, 0, NULL, NULL }, 91 { 0x007eb, 0x007f3, 0, NULL, NULL }, 92 { 0xe0001, 0xe0001, 0, NULL, NULL }, 93 { 0x1d185, 0x1d18b, 0, NULL, NULL }, 94 { 0x0feff, 0x0feff, 0, NULL, NULL }, 95 { 0x01b36, 0x01b3a, 0, NULL, NULL }, 96 { 0x01920, 0x01922, 0, NULL, NULL }, 97 { 0x00670, 0x00670, 0, NULL, NULL }, 98 { 0x00f90, 0x00f97, 0, NULL, NULL }, 99 { 0x01927, 0x01928, 0, NULL, NULL }, 100 { 0x0200b, 0x0200f, 0, NULL, NULL }, 101 { 0x0ff00, 0x0ff60, 2, NULL, NULL }, 102 { 0x0f900, 0x0faff, 2, NULL, NULL }, 103 { 0x0fb1e, 0x0fb1e, 0, NULL, NULL }, 104 { 0x00cbc, 0x00cbc, 0, NULL, NULL }, 105 { 0x00eb1, 0x00eb1, 0, NULL, NULL }, 106 { 0x10a38, 0x10a3a, 0, NULL, NULL }, 107 { 0x007a6, 0x007b0, 0, NULL, NULL }, 108 { 0x00f80, 0x00f84, 0, NULL, NULL }, 109 { 0x005c4, 0x005c5, 0, NULL, NULL }, 110 { 0x0ac00, 0x0d7a3, 2, NULL, NULL }, 111 { 0x017c9, 0x017d3, 0, NULL, NULL }, 112 { 0x00d4d, 0x00d4d, 0, NULL, NULL }, 113 { 0x1d167, 0x1d169, 0, NULL, NULL }, 114 { 0x01036, 0x01037, 0, NULL, NULL }, 115 { 0xe0020, 0xe007f, 0, NULL, NULL }, 116 { 0x00f35, 0x00f35, 0, NULL, NULL }, 117 { 0x017b4, 0x017b5, 0, NULL, NULL }, 118 { 0x0206a, 0x0206f, 0, NULL, NULL }, 119 { 0x00c46, 0x00c48, 0, NULL, NULL }, 120 { 0x01939, 0x0193b, 0, NULL, NULL }, 121 { 0x01dc0, 0x01dca, 0, NULL, NULL }, 122 { 0x10a0c, 0x10a0f, 0, NULL, NULL }, 123 { 0x0102d, 0x01030, 0, NULL, NULL }, 124 { 0x017c6, 0x017c6, 0, NULL, NULL }, 125 { 0x00ec8, 0x00ecd, 0, NULL, NULL }, 126 { 0x00b41, 0x00b43, 0, NULL, NULL }, 127 { 0x017b7, 0x017bd, 0, NULL, NULL }, 128 { 0x1d173, 0x1d182, 0, NULL, NULL }, 129 { 0x00a47, 0x00a48, 0, NULL, NULL }, 130 { 0x0232a, 0x0232a, 2, NULL, NULL }, 131 { 0x01b3c, 0x01b3c, 0, NULL, NULL }, 132 { 0x10a01, 0x10a03, 0, NULL, NULL }, 133 { 0x00ae2, 0x00ae3, 0, NULL, NULL }, 134 { 0x00483, 0x00486, 0, NULL, NULL }, 135 { 0x0135f, 0x0135f, 0, NULL, NULL }, 136 { 0x01a17, 0x01a18, 0, NULL, NULL }, 137 { 0x006e7, 0x006e8, 0, NULL, NULL }, 138 { 0x03099, 0x0309a, 0, NULL, NULL }, 139 { 0x00b4d, 0x00b4d, 0, NULL, NULL }, 140 { 0x00ce2, 0x00ce3, 0, NULL, NULL }, 141 { 0x00bcd, 0x00bcd, 0, NULL, NULL }, 142 { 0x00610, 0x00615, 0, NULL, NULL }, 143 { 0x00f99, 0x00fbc, 0, NULL, NULL }, 144 { 0x009c1, 0x009c4, 0, NULL, NULL }, 145 { 0x00730, 0x0074a, 0, NULL, NULL }, 146 { 0x00300, 0x0036f, 0, NULL, NULL }, 147 { 0x03030, 0x0303e, 2, NULL, NULL }, 148 { 0x01b34, 0x01b34, 0, NULL, NULL }, 149 { 0x1d1aa, 0x1d1ad, 0, NULL, NULL }, 150 { 0x00dca, 0x00dca, 0, NULL, NULL }, 151 { 0x006d6, 0x006e4, 0, NULL, NULL }, 152 { 0x00f86, 0x00f87, 0, NULL, NULL }, 153 { 0x00b3f, 0x00b3f, 0, NULL, NULL }, 154 { 0x0fe30, 0x0fe6f, 2, NULL, NULL }, 155 { 0x01039, 0x01039, 0, NULL, NULL }, 156 { 0x0094d, 0x0094d, 0, NULL, NULL }, 157 { 0x00c55, 0x00c56, 0, NULL, NULL }, 158 { 0x00488, 0x00489, 0, NULL, NULL }, 159 { 0x00e47, 0x00e4e, 0, NULL, NULL }, 160 { 0x00a81, 0x00a82, 0, NULL, NULL }, 161 { 0x00ac1, 0x00ac5, 0, NULL, NULL }, 162 { 0x0202a, 0x0202e, 0, NULL, NULL }, 163 { 0x00dd6, 0x00dd6, 0, NULL, NULL }, 164 { 0x018a9, 0x018a9, 0, NULL, NULL }, 165 { 0x0064b, 0x0065e, 0, NULL, NULL }, 166 { 0x00abc, 0x00abc, 0, NULL, NULL }, 167 { 0x00b82, 0x00b82, 0, NULL, NULL }, 168 { 0x00f39, 0x00f39, 0, NULL, NULL }, 169 { 0x020d0, 0x020ef, 0, NULL, NULL }, 170 { 0x01dfe, 0x01dff, 0, NULL, NULL }, 171 { 0x30000, 0x3fffd, 2, NULL, NULL }, 172 { 0x00711, 0x00711, 0, NULL, NULL }, 173 { 0x0fe00, 0x0fe0f, 0, NULL, NULL }, 174 { 0x01160, 0x011ff, 0, NULL, NULL }, 175 { 0x0180b, 0x0180d, 0, NULL, NULL }, 176 { 0x10a3f, 0x10a3f, 0, NULL, NULL }, 177 { 0x00981, 0x00981, 0, NULL, NULL }, 178 { 0x0a825, 0x0a826, 0, NULL, NULL }, 179 { 0x00941, 0x00948, 0, NULL, NULL }, 180 { 0x01b6b, 0x01b73, 0, NULL, NULL }, 181 { 0x00e31, 0x00e31, 0, NULL, NULL }, 182 { 0x0fe10, 0x0fe19, 2, NULL, NULL }, 183 { 0x00a01, 0x00a02, 0, NULL, NULL }, 184 { 0x00a4b, 0x00a4d, 0, NULL, NULL }, 185 { 0x00f18, 0x00f19, 0, NULL, NULL }, 186 { 0x00fc6, 0x00fc6, 0, NULL, NULL }, 187 { 0x02e80, 0x03029, 2, NULL, NULL }, 188 { 0x00b56, 0x00b56, 0, NULL, NULL }, 189 { 0x009bc, 0x009bc, 0, NULL, NULL }, 190 { 0x005c7, 0x005c7, 0, NULL, NULL }, 191 { 0x02060, 0x02063, 0, NULL, NULL }, 192 { 0x00c3e, 0x00c40, 0, NULL, NULL }, 193 { 0x10a05, 0x10a06, 0, NULL, NULL }, 194 }; 195 196 struct utf8_width_entry *utf8_width_root = NULL; 197 198 int utf8_overlap(struct utf8_width_entry *, struct utf8_width_entry *); 199 void utf8_print(struct utf8_width_entry *, int); 200 u_int utf8_combine(const u_char *); 201 202 int 203 utf8_overlap( 204 struct utf8_width_entry *item1, struct utf8_width_entry *item2) 205 { 206 if (item1->first >= item2->first && item1->first <= item2->last) 207 return (1); 208 if (item1->last >= item2->first && item1->last <= item2->last) 209 return (1); 210 if (item2->first >= item1->first && item2->first <= item1->last) 211 return (1); 212 if (item2->last >= item1->first && item2->last <= item1->last) 213 return (1); 214 return (0); 215 } 216 217 void 218 utf8_build(void) 219 { 220 struct utf8_width_entry **ptr, *item, *node; 221 u_int i, j; 222 223 for (i = 0; i < nitems(utf8_width_table); i++) { 224 item = &utf8_width_table[i]; 225 226 for (j = 0; j < nitems(utf8_width_table); j++) { 227 if (i != j && utf8_overlap(item, &utf8_width_table[j])) 228 log_fatalx("utf8 overlap: %u %u", i, j); 229 } 230 231 ptr = &utf8_width_root; 232 while (*ptr != NULL) { 233 node = *ptr; 234 if (item->last < node->first) 235 ptr = &(node->left); 236 else if (item->first > node->last) 237 ptr = &(node->right); 238 } 239 *ptr = item; 240 } 241 } 242 243 void 244 utf8_print(struct utf8_width_entry *node, int n) 245 { 246 log_debug("%*s%04x -> %04x", n, " ", node->first, node->last); 247 if (node->left != NULL) 248 utf8_print(node->left, n + 1); 249 if (node->right != NULL) 250 utf8_print(node->right, n + 1); 251 } 252 253 u_int 254 utf8_combine(const u_char *data) 255 { 256 u_int uvalue; 257 258 if (data[1] == 0xff) 259 uvalue = data[0]; 260 else if (data[2] == 0xff) { 261 uvalue = data[1] & 0x3f; 262 uvalue |= (data[0] & 0x1f) << 6; 263 } else if (data[3] == 0xff) { 264 uvalue = data[2] & 0x3f; 265 uvalue |= (data[1] & 0x3f) << 6; 266 uvalue |= (data[0] & 0x0f) << 12; 267 } else { 268 uvalue = data[3] & 0x3f; 269 uvalue |= (data[2] & 0x3f) << 6; 270 uvalue |= (data[1] & 0x3f) << 12; 271 uvalue |= (data[0] & 0x3f) << 18; 272 } 273 return (uvalue); 274 } 275 276 int 277 utf8_width(const u_char *udata) 278 { 279 struct utf8_width_entry *item; 280 u_int uvalue; 281 282 uvalue = utf8_combine(udata); 283 284 item = utf8_width_root; 285 while (item != NULL) { 286 if (uvalue < item->first) 287 item = item->left; 288 else if (uvalue > item->last) 289 item = item->right; 290 else 291 return (item->width); 292 } 293 return (1); 294 } 295