1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/* //device/libs/android_runtime/android_text_AndroidCharacter.cpp
**
** Copyright 2006, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#define LOG_TAG "AndroidUnicode"
#include <jni.h>
#include <android_runtime/AndroidRuntime.h>
#include "utils/misc.h"
#include "utils/AndroidUnicode.h"
#include "utils/Log.h"
namespace android {
static void jniThrowException(JNIEnv* env, const char* exc, const char* msg = NULL)
{
jclass excClazz = env->FindClass(exc);
LOG_ASSERT(excClazz, "Unable to find class %s", exc);
env->ThrowNew(excClazz, msg);
}
static void getDirectionalities(JNIEnv* env, jobject obj, jcharArray srcArray, jbyteArray destArray, int count)
{
jchar* src = env->GetCharArrayElements(srcArray, NULL);
jbyte* dest = env->GetByteArrayElements(destArray, NULL);
if (src == NULL || dest == NULL) {
jniThrowException(env, "java/lang/NullPointerException", NULL);
goto DIRECTION_END;
}
if (env->GetArrayLength(srcArray) < count || env->GetArrayLength(destArray) < count) {
jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL);
goto DIRECTION_END;
}
for (int i = 0; i < count; i++) {
if (src[i] >= 0xD800 && src[i] <= 0xDBFF &&
i + 1 < count &&
src[i + 1] >= 0xDC00 && src[i + 1] <= 0xDFFF) {
int c = 0x00010000 + ((src[i] - 0xD800) << 10) +
(src[i + 1] & 0x3FF);
int dir = android::Unicode::getDirectionality(c);
dest[i++] = dir;
dest[i] = dir;
} else {
int c = src[i];
int dir = android::Unicode::getDirectionality(c);
dest[i] = dir;
}
}
DIRECTION_END:
env->ReleaseCharArrayElements(srcArray, src, JNI_ABORT);
env->ReleaseByteArrayElements(destArray, dest, JNI_ABORT);
}
static jboolean mirror(JNIEnv* env, jobject obj, jcharArray charArray, int start, int count)
{
jchar* data = env->GetCharArrayElements(charArray, NULL);
bool ret = false;
if (data == NULL) {
jniThrowException(env, "java/lang/NullPointerException", NULL);
goto MIRROR_END;
}
if (start > start + count || env->GetArrayLength(charArray) < count) {
jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL);
goto MIRROR_END;
}
for (int i = start; i < start + count; i++) {
// XXX this thinks it knows that surrogates are never mirrored
int c1 = data[i];
int c2 = android::Unicode::toMirror(c1);
if (c1 != c2) {
data[i] = c2;
ret = true;
}
}
MIRROR_END:
env->ReleaseCharArrayElements(charArray, data, JNI_ABORT);
return ret;
}
static jchar getMirror(JNIEnv* env, jobject obj, jchar c)
{
return android::Unicode::toMirror(c);
}
static JNINativeMethod gMethods[] = {
{ "getDirectionalities", "([C[BI)V",
(void*) getDirectionalities },
{ "mirror", "([CII)Z",
(void*) mirror },
{ "getMirror", "(C)C",
(void*) getMirror }
};
int register_android_text_AndroidCharacter(JNIEnv* env)
{
jclass clazz = env->FindClass("android/text/AndroidCharacter");
LOG_ASSERT(clazz, "Cannot find android/text/AndroidCharacter");
return AndroidRuntime::registerNativeMethods(env, "android/text/AndroidCharacter",
gMethods, NELEM(gMethods));
}
}
|
