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annotate lib/unictype/scripts.c @ 40057:b06060465f09

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maint: Run 'make update-copyright'
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 01 Jan 2019 00:25:11 +0100
parents 10eb9086bea0
children
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1 /* Scripts of Unicode characters.
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2 Copyright (C) 2007, 2009-2019 Free Software Foundation, Inc.
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3 Written by Bruno Haible <bruno@clisp.org>, 2007.
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4
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5 This program is free software: you can redistribute it and/or modify it
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6 under the terms of the GNU Lesser General Public License as published
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7 by the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public License
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16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
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17
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18 #include <config.h>
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19
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20 /* Specification. */
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21 #include "unictype.h"
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22
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23 #include <string.h>
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24
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25 #include "scripts.h"
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26 #include "unictype/scripts_byname.h"
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27
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28 const uc_script_t *
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29 uc_script (ucs4_t uc)
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30 {
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31 unsigned int index1 = uc >> script_header_0;
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32 if (index1 < script_header_1)
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33 {
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34 int lookup1 = u_script.level1[index1];
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35 if (lookup1 >= 0)
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36 {
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37 unsigned int index2 = (uc >> script_header_2) & script_header_3;
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38 int lookup2 = u_script.level2[lookup1 + index2];
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39 if (lookup2 >= 0)
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40 {
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41 unsigned int index3 = (uc & script_header_4);
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42 unsigned char lookup3 = u_script.level3[lookup2 + index3];
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43
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44 if (lookup3 != 0xff)
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45 return &scripts[lookup3];
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46 }
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47 }
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48 }
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49 return NULL;
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50 }
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51
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52 const uc_script_t *
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53 uc_script_byname (const char *script_name)
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54 {
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55 const struct named_script *found;
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56
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57 found = uc_script_lookup (script_name, strlen (script_name));
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58 if (found != NULL)
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59 return &scripts[found->index];
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60 else
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61 return NULL;
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62 }
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63
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64 bool
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65 uc_is_script (ucs4_t uc, const uc_script_t *script)
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66 {
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67 return uc_script (uc) == script;
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68 }
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69
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70 void
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71 uc_all_scripts (const uc_script_t **scriptsp, size_t *countp)
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72 {
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73 *scriptsp = scripts;
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74 *countp = sizeof (scripts) / sizeof (scripts[0]);
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75 }