1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23
24 #include "unichars.h"
25 #include "osl/diagnose.h"
26 #include "sal/types.h"
27
ImplIsNoncharacter(sal_uInt32 nUtf32)28 int ImplIsNoncharacter(sal_uInt32 nUtf32)
29 {
30 /* All code points that are noncharacters, as of Unicode 3.1.1. */
31 return (nUtf32 >= 0xFDD0 && nUtf32 <= 0xFDEF)
32 || (nUtf32 & 0xFFFF) >= 0xFFFE
33 || nUtf32 > 0x10FFFF;
34 }
35
ImplIsControlOrFormat(sal_uInt32 nUtf32)36 int ImplIsControlOrFormat(sal_uInt32 nUtf32)
37 {
38 /* All code points of <http://www.unicode.org/Public/UNIDATA/
39 UnicodeData.txt>, Version 3.1.1, that have a General Category of Cc
40 (Other, Control) or Cf (Other, Format).
41 */
42 return nUtf32 <= 0x001F
43 || (nUtf32 >= 0x007F && nUtf32 <= 0x009F)
44 || nUtf32 == 0x070F /* SYRIAC ABBREVIATION MARK */
45 || nUtf32 == 0x180B /* MONGOLIAN FREE VARIATION SELECTOR ONE */
46 || nUtf32 == 0x180C /* MONGOLIAN FREE VARIATION SELECTOR TWO */
47 || nUtf32 == 0x180D /* MONGOLIAN FREE VARIATION SELECTOR THREE */
48 || nUtf32 == 0x180E /* MONGOLIAN VOWEL SEPARATOR */
49 || nUtf32 == 0x200C /* ZERO WIDTH NON-JOINER */
50 || nUtf32 == 0x200D /* ZERO WIDTH JOINER */
51 || nUtf32 == 0x200E /* LEFT-TO-RIGHT MARK */
52 || nUtf32 == 0x200F /* RIGHT-TO-LEFT MARK */
53 || nUtf32 == 0x202A /* LEFT-TO-RIGHT EMBEDDING */
54 || nUtf32 == 0x202B /* RIGHT-TO-LEFT EMBEDDING */
55 || nUtf32 == 0x202C /* POP DIRECTIONAL FORMATTING */
56 || nUtf32 == 0x202D /* LEFT-TO-RIGHT OVERRIDE */
57 || nUtf32 == 0x202E /* RIGHT-TO-LEFT OVERRIDE */
58 || nUtf32 == 0x206A /* INHIBIT SYMMETRIC SWAPPING */
59 || nUtf32 == 0x206B /* ACTIVATE SYMMETRIC SWAPPING */
60 || nUtf32 == 0x206C /* INHIBIT ARABIC FORM SHAPING */
61 || nUtf32 == 0x206D /* ACTIVATE ARABIC FORM SHAPING */
62 || nUtf32 == 0x206E /* NATIONAL DIGIT SHAPES */
63 || nUtf32 == 0x206F /* NOMINAL DIGIT SHAPES */
64 || nUtf32 == 0xFEFF /* ZERO WIDTH NO-BREAK SPACE */
65 || nUtf32 == 0xFFF9 /* INTERLINEAR ANNOTATION ANCHOR */
66 || nUtf32 == 0xFFFA /* INTERLINEAR ANNOTATION SEPARATOR */
67 || nUtf32 == 0xFFFB /* INTERLINEAR ANNOTATION TERMINATOR */
68 || nUtf32 == 0x1D173 /* MUSICAL SYMBOL BEGIN BEAM */
69 || nUtf32 == 0x1D174 /* MUSICAL SYMBOL END BEAM */
70 || nUtf32 == 0x1D175 /* MUSICAL SYMBOL BEGIN TIE */
71 || nUtf32 == 0x1D176 /* MUSICAL SYMBOL END TIE */
72 || nUtf32 == 0x1D177 /* MUSICAL SYMBOL BEGIN SLUR */
73 || nUtf32 == 0x1D178 /* MUSICAL SYMBOL END SLUR */
74 || nUtf32 == 0x1D179 /* MUSICAL SYMBOL BEGIN PHRASE */
75 || nUtf32 == 0x1D17A /* MUSICAL SYMBOL END PHRASE */
76 || nUtf32 == 0xE0001 /* LANGUAGE TAG */
77 || (nUtf32 >= 0xE0020 && nUtf32 <= 0xE007F);
78 }
79
ImplIsHighSurrogate(sal_uInt32 nUtf32)80 int ImplIsHighSurrogate(sal_uInt32 nUtf32)
81 {
82 /* All code points that are high-surrogates, as of Unicode 3.1.1. */
83 return nUtf32 >= 0xD800 && nUtf32 <= 0xDBFF;
84 }
85
ImplIsLowSurrogate(sal_uInt32 nUtf32)86 int ImplIsLowSurrogate(sal_uInt32 nUtf32)
87 {
88 /* All code points that are low-surrogates, as of Unicode 3.1.1. */
89 return nUtf32 >= 0xDC00 && nUtf32 <= 0xDFFF;
90 }
91
ImplIsPrivateUse(sal_uInt32 nUtf32)92 int ImplIsPrivateUse(sal_uInt32 nUtf32)
93 {
94 /* All code points of <http://www.unicode.org/Public/UNIDATA/
95 UnicodeData.txt>, Version 3.1.1, that have a General Category of Co
96 (Other, Private Use).
97 */
98 return (nUtf32 >= 0xE000 && nUtf32 <= 0xF8FF)
99 || (nUtf32 >= 0xF0000 && nUtf32 <= 0xFFFFD)
100 || (nUtf32 >= 0x100000 && nUtf32 <= 0x10FFFD);
101 }
102
ImplIsZeroWidth(sal_uInt32 nUtf32)103 int ImplIsZeroWidth(sal_uInt32 nUtf32)
104 {
105 /* All code points of <http://www.unicode.org/Public/UNIDATA/
106 UnicodeData.txt>, Version 3.1.1, that have "ZERO WIDTH" in their
107 Character name.
108 */
109 return nUtf32 == 0x200B /* ZERO WIDTH SPACE */
110 || nUtf32 == 0x200C /* ZERO WIDTH NON-JOINER */
111 || nUtf32 == 0x200D /* ZERO WIDTH JOINER */
112 || nUtf32 == 0xFEFF; /* ZEOR WIDTH NO-BREAK SPACE */
113 }
114
ImplGetHighSurrogate(sal_uInt32 nUtf32)115 sal_uInt32 ImplGetHighSurrogate(sal_uInt32 nUtf32)
116 {
117 OSL_ENSURE(nUtf32 >= 0x10000, "specification violation");
118 return ((nUtf32 - 0x10000) >> 10) | 0xD800;
119 }
120
ImplGetLowSurrogate(sal_uInt32 nUtf32)121 sal_uInt32 ImplGetLowSurrogate(sal_uInt32 nUtf32)
122 {
123 OSL_ENSURE(nUtf32 >= 0x10000, "specification violation");
124 return ((nUtf32 - 0x10000) & 0x3FF) | 0xDC00;
125 }
126
ImplCombineSurrogates(sal_uInt32 nHigh,sal_uInt32 nLow)127 sal_uInt32 ImplCombineSurrogates(sal_uInt32 nHigh, sal_uInt32 nLow)
128 {
129 OSL_ENSURE(ImplIsHighSurrogate(nHigh) && ImplIsLowSurrogate(nLow),
130 "specification violation");
131 return (((nHigh & 0x3FF) << 10) | (nLow & 0x3FF)) + 0x10000;
132 }
133