LatinIME/native/jni/com_android_inputmethod_lat...

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/*
**
** Copyright 2009, 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 "LatinIME: jni: BinaryDictionary"
#include "binary_format.h"
#include "com_android_inputmethod_latin_BinaryDictionary.h"
#include "dictionary.h"
#include "jni.h"
#include "jni_common.h"
#include "proximity_info.h"
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#ifdef USE_MMAP_FOR_DICTIONARY
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#else // USE_MMAP_FOR_DICTIONARY
#include <stdlib.h>
#endif // USE_MMAP_FOR_DICTIONARY
namespace latinime {
void releaseDictBuf(void* dictBuf, const size_t length, int fd);
static jlong latinime_BinaryDictionary_open(JNIEnv *env, jobject object,
jstring sourceDir, jlong dictOffset, jlong dictSize,
jint typedLetterMultiplier, jint fullWordMultiplier, jint maxWordLength, jint maxWords,
jint maxAlternatives) {
PROF_OPEN;
PROF_START(66);
const char *sourceDirChars = env->GetStringUTFChars(sourceDir, 0);
if (sourceDirChars == 0) {
LOGE("DICT: Can't get sourceDir string");
return 0;
}
int fd = 0;
void *dictBuf = 0;
int adjust = 0;
#ifdef USE_MMAP_FOR_DICTIONARY
/* mmap version */
fd = open(sourceDirChars, O_RDONLY);
if (fd < 0) {
LOGE("DICT: Can't open sourceDir. sourceDirChars=%s errno=%d", sourceDirChars, errno);
return 0;
}
int pagesize = getpagesize();
adjust = dictOffset % pagesize;
int adjDictOffset = dictOffset - adjust;
int adjDictSize = dictSize + adjust;
dictBuf = mmap(0, sizeof(char) * adjDictSize, PROT_READ, MAP_PRIVATE, fd, adjDictOffset);
if (dictBuf == MAP_FAILED) {
LOGE("DICT: Can't mmap dictionary. errno=%d", errno);
return 0;
}
dictBuf = (void *)((char *)dictBuf + adjust);
#else // USE_MMAP_FOR_DICTIONARY
/* malloc version */
FILE *file = 0;
file = fopen(sourceDirChars, "rb");
if (file == 0) {
LOGE("DICT: Can't fopen sourceDir. sourceDirChars=%s errno=%d", sourceDirChars, errno);
return 0;
}
dictBuf = malloc(sizeof(char) * dictSize);
if (!dictBuf) {
LOGE("DICT: Can't allocate memory region for dictionary. errno=%d", errno);
return 0;
}
int ret = fseek(file, (long)dictOffset, SEEK_SET);
if (ret != 0) {
LOGE("DICT: Failure in fseek. ret=%d errno=%d", ret, errno);
return 0;
}
ret = fread(dictBuf, sizeof(char) * dictSize, 1, file);
if (ret != 1) {
LOGE("DICT: Failure in fread. ret=%d errno=%d", ret, errno);
return 0;
}
ret = fclose(file);
if (ret != 0) {
LOGE("DICT: Failure in fclose. ret=%d errno=%d", ret, errno);
return 0;
}
#endif // USE_MMAP_FOR_DICTIONARY
env->ReleaseStringUTFChars(sourceDir, sourceDirChars);
if (!dictBuf) {
LOGE("DICT: dictBuf is null");
return 0;
}
Dictionary *dictionary = 0;
if (BinaryFormat::UNKNOWN_FORMAT == BinaryFormat::detectFormat((uint8_t*)dictBuf)) {
LOGE("DICT: dictionary format is unknown, bad magic number");
#ifdef USE_MMAP_FOR_DICTIONARY
releaseDictBuf(((char*)dictBuf) - adjust, adjDictSize, fd);
#else // USE_MMAP_FOR_DICTIONARY
releaseDictBuf(dictBuf, 0, 0);
#endif // USE_MMAP_FOR_DICTIONARY
} else {
dictionary = new Dictionary(dictBuf, dictSize, fd, adjust, typedLetterMultiplier,
fullWordMultiplier, maxWordLength, maxWords, maxAlternatives);
}
PROF_END(66);
PROF_CLOSE;
return (jlong)dictionary;
}
static int latinime_BinaryDictionary_getSuggestions(JNIEnv *env, jobject object, jlong dict,
jlong proximityInfo, jintArray xCoordinatesArray, jintArray yCoordinatesArray,
jintArray inputArray, jint arraySize, jint flags,
jcharArray outputArray, jintArray frequencyArray) {
Dictionary *dictionary = (Dictionary*)dict;
if (!dictionary) return 0;
ProximityInfo *pInfo = (ProximityInfo*)proximityInfo;
int *xCoordinates = env->GetIntArrayElements(xCoordinatesArray, 0);
int *yCoordinates = env->GetIntArrayElements(yCoordinatesArray, 0);
int *frequencies = env->GetIntArrayElements(frequencyArray, 0);
int *inputCodes = env->GetIntArrayElements(inputArray, 0);
jchar *outputChars = env->GetCharArrayElements(outputArray, 0);
int count = dictionary->getSuggestions(pInfo, xCoordinates, yCoordinates, inputCodes,
arraySize, flags, (unsigned short*) outputChars, frequencies);
env->ReleaseIntArrayElements(frequencyArray, frequencies, 0);
env->ReleaseIntArrayElements(inputArray, inputCodes, JNI_ABORT);
env->ReleaseIntArrayElements(xCoordinatesArray, xCoordinates, 0);
env->ReleaseIntArrayElements(yCoordinatesArray, yCoordinates, 0);
env->ReleaseCharArrayElements(outputArray, outputChars, 0);
return count;
}
static int latinime_BinaryDictionary_getBigrams(JNIEnv *env, jobject object, jlong dict,
jcharArray prevWordArray, jint prevWordLength, jintArray inputArray, jint inputArraySize,
jcharArray outputArray, jintArray frequencyArray, jint maxWordLength, jint maxBigrams,
jint maxAlternatives) {
Dictionary *dictionary = (Dictionary*)dict;
if (!dictionary) return 0;
jchar *prevWord = env->GetCharArrayElements(prevWordArray, 0);
int *inputCodes = env->GetIntArrayElements(inputArray, 0);
jchar *outputChars = env->GetCharArrayElements(outputArray, 0);
int *frequencies = env->GetIntArrayElements(frequencyArray, 0);
int count = dictionary->getBigrams((unsigned short*) prevWord, prevWordLength, inputCodes,
inputArraySize, (unsigned short*) outputChars, frequencies, maxWordLength, maxBigrams,
maxAlternatives);
env->ReleaseCharArrayElements(prevWordArray, prevWord, JNI_ABORT);
env->ReleaseIntArrayElements(inputArray, inputCodes, JNI_ABORT);
env->ReleaseCharArrayElements(outputArray, outputChars, 0);
env->ReleaseIntArrayElements(frequencyArray, frequencies, 0);
return count;
}
static jboolean latinime_BinaryDictionary_isValidWord(JNIEnv *env, jobject object, jlong dict,
jcharArray wordArray, jint wordLength) {
Dictionary *dictionary = (Dictionary*)dict;
if (!dictionary) return (jboolean) false;
jchar *word = env->GetCharArrayElements(wordArray, 0);
jboolean result = dictionary->isValidWord((unsigned short*) word, wordLength);
env->ReleaseCharArrayElements(wordArray, word, JNI_ABORT);
return result;
}
static void latinime_BinaryDictionary_close(JNIEnv *env, jobject object, jlong dict) {
Dictionary *dictionary = (Dictionary*)dict;
if (!dictionary) return;
void *dictBuf = dictionary->getDict();
if (!dictBuf) return;
#ifdef USE_MMAP_FOR_DICTIONARY
releaseDictBuf((void *)((char *)dictBuf - dictionary->getDictBufAdjust()),
dictionary->getDictSize() + dictionary->getDictBufAdjust(), dictionary->getMmapFd());
#else // USE_MMAP_FOR_DICTIONARY
releaseDictBuf(dictBuf, 0, 0);
#endif // USE_MMAP_FOR_DICTIONARY
delete dictionary;
}
void releaseDictBuf(void* dictBuf, const size_t length, int fd) {
#ifdef USE_MMAP_FOR_DICTIONARY
int ret = munmap(dictBuf, length);
if (ret != 0) {
LOGE("DICT: Failure in munmap. ret=%d errno=%d", ret, errno);
}
ret = close(fd);
if (ret != 0) {
LOGE("DICT: Failure in close. ret=%d errno=%d", ret, errno);
}
#else // USE_MMAP_FOR_DICTIONARY
free(dictBuf);
#endif // USE_MMAP_FOR_DICTIONARY
}
static JNINativeMethod sMethods[] = {
{"openNative", "(Ljava/lang/String;JJIIIII)J", (void*)latinime_BinaryDictionary_open},
{"closeNative", "(J)V", (void*)latinime_BinaryDictionary_close},
{"getSuggestionsNative", "(JJ[I[I[III[C[I)I", (void*)latinime_BinaryDictionary_getSuggestions},
{"isValidWordNative", "(J[CI)Z", (void*)latinime_BinaryDictionary_isValidWord},
{"getBigramsNative", "(J[CI[II[C[IIII)I", (void*)latinime_BinaryDictionary_getBigrams}
};
int register_BinaryDictionary(JNIEnv *env) {
const char* const kClassPathName = "com/android/inputmethod/latin/BinaryDictionary";
return registerNativeMethods(env, kClassPathName, sMethods,
sizeof(sMethods) / sizeof(sMethods[0]));
}
} // namespace latinime