| /* |
| * Copyright (C) 2010 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 "MatcherState" |
| |
| #include "IcuUtilities.h" |
| #include "MatcherState.h" |
| |
| #include <android-base/logging.h> |
| |
| #include <nativehelper/ScopedPrimitiveArray.h> |
| #include <nativehelper/ScopedStringChars.h> |
| |
| |
| MatcherState::MatcherState(icu::RegexMatcher* matcher) : |
| mMatcher(matcher), |
| mUChars(nullptr), |
| mUText(nullptr), |
| mStatus(U_ZERO_ERROR) { |
| } |
| |
| bool MatcherState::updateInput(JNIEnv* env, jstring input) { |
| // First, close the UText struct, since we're about to allocate a new one. |
| if (mUText != nullptr) { |
| utext_close(mUText); |
| mUText = nullptr; |
| } |
| |
| // Then delete the UChar* associated with the UText struct.. |
| mUChars.reset(nullptr); |
| |
| // TODO: We should investigate whether we can avoid an additional copy |
| // in the native heap when is_copy == JNI_TRUE. The problem with doing |
| // that is that we might call ReleaseStringChars with a different |
| // JNIEnv* on a different downcall. This is currently safe as |
| // implemented in ART, but is unlikely to be portable and the spec stays |
| // silent on the matter. |
| ScopedStringChars inputChars(env, input); |
| if (inputChars.get() == nullptr) { |
| // There will be an exception pending if we get here. |
| return false; |
| } |
| |
| // Make a copy of |input| on the native heap. This copy will be live |
| // until the next call to updateInput or close. |
| mUChars.reset(new (std::nothrow) UChar[inputChars.size()]); |
| if (mUChars.get() == nullptr) { |
| env->ThrowNew(env->FindClass("Ljava/lang/OutOfMemoryError;"), "Out of memory"); |
| return false; |
| } |
| |
| static_assert(sizeof(UChar) == sizeof(jchar), "sizeof(Uchar) != sizeof(jchar)"); |
| memcpy(mUChars.get(), inputChars.get(), inputChars.size() * sizeof(jchar)); |
| |
| // Reset any errors that might have occurred on previous patches. |
| mStatus = U_ZERO_ERROR; |
| mUText = utext_openUChars(nullptr, mUChars.get(), inputChars.size(), &mStatus); |
| if (mUText == nullptr) { |
| CHECK(maybeThrowIcuException(env, "utext_openUChars", mStatus)); |
| return false; |
| } |
| |
| // It is an error for ICU to have returned a non-null mUText but to |
| // still have indicated an error. |
| CHECK(U_SUCCESS(mStatus)); |
| |
| mMatcher->reset(mUText); |
| return true; |
| } |
| |
| MatcherState::~MatcherState() { |
| if (mUText != nullptr) { |
| utext_close(mUText); |
| } |
| } |
| |
| icu::RegexMatcher* MatcherState::matcher() { |
| return mMatcher.get(); |
| } |
| |
| UErrorCode& MatcherState::status() { |
| return mStatus; |
| } |
| |
| void MatcherState::updateOffsets(JNIEnv* env, jintArray javaOffsets) { |
| ScopedIntArrayRW offsets(env, javaOffsets); |
| if (offsets.get() == NULL) { |
| return; |
| } |
| |
| for (size_t i = 0, groupCount = mMatcher->groupCount(); i <= groupCount; ++i) { |
| offsets[2*i + 0] = mMatcher->start(i, mStatus); |
| offsets[2*i + 1] = mMatcher->end(i, mStatus); |
| } |
| } |