1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "LatinIME: jni: BinaryDictionaryUtils"
18
19#include "com_android_inputmethod_latin_BinaryDictionaryUtils.h"
20
21#include "defines.h"
22#include "dictionary/utils/dict_file_writing_utils.h"
23#include "jni.h"
24#include "jni_common.h"
25#include "utils/autocorrection_threshold_utils.h"
26#include "utils/char_utils.h"
27#include "utils/jni_data_utils.h"
28#include "utils/time_keeper.h"
29
30namespace latinime {
31
32static jboolean latinime_BinaryDictionaryUtils_createEmptyDictFile(JNIEnv *env, jclass clazz,
33        jstring filePath, jlong dictVersion, jstring locale, jobjectArray attributeKeyStringArray,
34        jobjectArray attributeValueStringArray) {
35    const jsize filePathUtf8Length = env->GetStringUTFLength(filePath);
36    char filePathChars[filePathUtf8Length + 1];
37    env->GetStringUTFRegion(filePath, 0, env->GetStringLength(filePath), filePathChars);
38    filePathChars[filePathUtf8Length] = '\0';
39
40    const jsize localeUtf8Length = env->GetStringUTFLength(locale);
41    char localeChars[localeUtf8Length + 1];
42    env->GetStringUTFRegion(locale, 0, env->GetStringLength(locale), localeChars);
43    localeChars[localeUtf8Length] = '\0';
44    std::vector<int> localeCodePoints;
45    HeaderReadWriteUtils::insertCharactersIntoVector(localeChars, &localeCodePoints);
46
47    const int keyCount = env->GetArrayLength(attributeKeyStringArray);
48    const int valueCount = env->GetArrayLength(attributeValueStringArray);
49    if (keyCount != valueCount) {
50        return false;
51    }
52    DictionaryHeaderStructurePolicy::AttributeMap attributeMap =
53            JniDataUtils::constructAttributeMap(env, attributeKeyStringArray,
54                    attributeValueStringArray);
55    return DictFileWritingUtils::createEmptyDictFile(filePathChars, static_cast<int>(dictVersion),
56            localeCodePoints, &attributeMap);
57}
58
59static jfloat latinime_BinaryDictionaryUtils_calcNormalizedScore(JNIEnv *env, jclass clazz,
60        jintArray before, jintArray after, jint score) {
61    jsize beforeLength = env->GetArrayLength(before);
62    jsize afterLength = env->GetArrayLength(after);
63    int beforeCodePoints[beforeLength];
64    int afterCodePoints[afterLength];
65    env->GetIntArrayRegion(before, 0, beforeLength, beforeCodePoints);
66    env->GetIntArrayRegion(after, 0, afterLength, afterCodePoints);
67    return AutocorrectionThresholdUtils::calcNormalizedScore(beforeCodePoints, beforeLength,
68            afterCodePoints, afterLength, score);
69}
70
71static int latinime_BinaryDictionaryUtils_setCurrentTimeForTest(JNIEnv *env, jclass clazz,
72        jint currentTime) {
73    if (currentTime >= 0) {
74        TimeKeeper::startTestModeWithForceCurrentTime(currentTime);
75    } else {
76        TimeKeeper::stopTestMode();
77    }
78    TimeKeeper::setCurrentTime();
79    return TimeKeeper::peekCurrentTime();
80}
81
82static const JNINativeMethod sMethods[] = {
83    {
84        const_cast<char *>("createEmptyDictFileNative"),
85        const_cast<char *>(
86                "(Ljava/lang/String;JLjava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)Z"),
87        reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_createEmptyDictFile)
88    },
89    {
90        const_cast<char *>("calcNormalizedScoreNative"),
91        const_cast<char *>("([I[II)F"),
92        reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_calcNormalizedScore)
93    },
94    {
95        const_cast<char *>("setCurrentTimeForTestNative"),
96        const_cast<char *>("(I)I"),
97        reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_setCurrentTimeForTest)
98    }
99};
100
101int register_BinaryDictionaryUtils(JNIEnv *env) {
102    const char *const kClassPathName = "com/android/inputmethod/latin/utils/BinaryDictionaryUtils";
103    return registerNativeMethods(env, kClassPathName, sMethods, NELEMS(sMethods));
104}
105} // namespace latinime
106