Merge "Revert "Remove the implementation of libaapt2_jni in build file""

    defaults: ["aapt2_defaults"],

}

// ==========================================================

// Build the host shared library: aapt2_jni

// ==========================================================

cc_library_host_shared {

    name: "libaapt2_jni",

    srcs: toolSources + ["jni/aapt2_jni.cpp"],

    static_libs: ["libaapt2"],

    defaults: ["aapt2_defaults"],

}

// ==========================================================

// Build the host tests: aapt2_tests

// ==========================================================

/*

 * 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.

 */

#ifndef SCOPED_UTF_CHARS_H_included

#define SCOPED_UTF_CHARS_H_included

#include <string.h>

#include <jni.h>

#include "android-base/logging.h"

// This file was copied with some minor modifications from libnativehelper.

// As soon as libnativehelper can be compiled for Windows, this file should be

// replaced with libnativehelper's implementation.

class ScopedUtfChars {

 public:

  ScopedUtfChars(JNIEnv* env, jstring s) : env_(env), string_(s) {

    CHECK(s != nullptr);

    utf_chars_ = env->GetStringUTFChars(s, nullptr);

  }

  ScopedUtfChars(ScopedUtfChars&& rhs) :

      env_(rhs.env_), string_(rhs.string_), utf_chars_(rhs.utf_chars_) {

    rhs.env_ = nullptr;

    rhs.string_ = nullptr;

    rhs.utf_chars_ = nullptr;

  }

  ~ScopedUtfChars() {

    if (utf_chars_) {

      env_->ReleaseStringUTFChars(string_, utf_chars_);

    }

  }

  ScopedUtfChars& operator=(ScopedUtfChars&& rhs) {

    if (this != &rhs) {

      // Delete the currently owned UTF chars.

      this->~ScopedUtfChars();

      // Move the rhs ScopedUtfChars and zero it out.

      env_ = rhs.env_;

      string_ = rhs.string_;

      utf_chars_ = rhs.utf_chars_;

      rhs.env_ = nullptr;

      rhs.string_ = nullptr;

      rhs.utf_chars_ = nullptr;

    }

    return *this;

  }

  const char* c_str() const {

    return utf_chars_;

  }

  size_t size() const {

    return strlen(utf_chars_);

  }

  const char& operator[](size_t n) const {

    return utf_chars_[n];

  }

 private:

  JNIEnv* env_;

  jstring string_;

  const char* utf_chars_;

  DISALLOW_COPY_AND_ASSIGN(ScopedUtfChars);

};

#endif  // SCOPED_UTF_CHARS_H_included

/*

 * Copyright (C) 2015 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.

 */

#include "com_android_tools_aapt2_Aapt2Jni.h"

#include <algorithm>

#include <memory>

#include <utility>

#include <vector>

#include "android-base/logging.h"

#include "ScopedUtfChars.h"

#include "Diagnostics.h"

#include "cmd/Compile.h"

#include "cmd/Link.h"

#include "util/Util.h"

using android::StringPiece;

/*

 * Converts a java List<String> into C++ vector<ScopedUtfChars>.

 */

static std::vector<ScopedUtfChars> list_to_utfchars(JNIEnv *env, jobject obj) {

  std::vector<ScopedUtfChars> converted;

  // Call size() method on the list to know how many elements there are.

  jclass list_cls = env->GetObjectClass(obj);

  jmethodID size_method_id = env->GetMethodID(list_cls, "size", "()I");

  CHECK(size_method_id != 0);

  jint size = env->CallIntMethod(obj, size_method_id);

  CHECK(size >= 0);

  // Now, iterate all strings in the list

  // (note: generic erasure means get() return an Object)

  jmethodID get_method_id = env->GetMethodID(list_cls, "get", "(I)Ljava/lang/Object;");

  CHECK(get_method_id != 0);

  for (jint i = 0; i < size; i++) {

    // Call get(i) to get the string in the ith position.

    jobject string_obj_uncast = env->CallObjectMethod(obj, get_method_id, i);

    CHECK(string_obj_uncast != nullptr);

    jstring string_obj = static_cast<jstring>(string_obj_uncast);

    converted.push_back(ScopedUtfChars(env, string_obj));

  }

  return converted;

}

/*

 * Extracts all StringPiece from the ScopedUtfChars instances.

 *

 * The returned pieces can only be used while the original ones have not been

 * destroyed.

 */

static std::vector<StringPiece> extract_pieces(const std::vector<ScopedUtfChars> &strings) {

  std::vector<StringPiece> pieces;

  std::for_each(

      strings.begin(), strings.end(),

      [&pieces](const ScopedUtfChars &p) { pieces.push_back(p.c_str()); });

  return pieces;

}

class JniDiagnostics : public aapt::IDiagnostics {

 public:

  JniDiagnostics(JNIEnv* env, jobject diagnostics_obj)

      : env_(env), diagnostics_obj_(diagnostics_obj) {

    mid_ = NULL;

  }

  void Log(Level level, aapt::DiagMessageActual& actual_msg) override {

    jint level_value;

    switch (level) {

      case Level::Error:

        level_value = 3;

        break;

      case Level::Warn:

        level_value = 2;

        break;

      case Level::Note:

        level_value = 1;

        break;

    }

    jstring message = env_->NewStringUTF(actual_msg.message.c_str());

    jstring path = env_->NewStringUTF(actual_msg.source.path.c_str());

    jlong line = -1;

    if (actual_msg.source.line) {

      line = actual_msg.source.line.value();

    }

    if (!mid_) {

      jclass diagnostics_cls = env_->GetObjectClass(diagnostics_obj_);

      mid_ = env_->GetMethodID(diagnostics_cls, "log", "(ILjava/lang/String;JLjava/lang/String;)V");

    }

    env_->CallVoidMethod(diagnostics_obj_, mid_, level_value, path, line, message);

  }

 private:

  JNIEnv* env_;

  jobject diagnostics_obj_;

  jmethodID mid_;

  DISALLOW_COPY_AND_ASSIGN(JniDiagnostics);

};

JNIEXPORT jint JNICALL Java_com_android_tools_aapt2_Aapt2Jni_nativeCompile(

    JNIEnv* env, jclass aapt_obj, jobject arguments_obj, jobject diagnostics_obj) {

  std::vector<ScopedUtfChars> compile_args_jni =

      list_to_utfchars(env, arguments_obj);

  std::vector<StringPiece> compile_args = extract_pieces(compile_args_jni);

  JniDiagnostics diagnostics(env, diagnostics_obj);

  return aapt::CompileCommand(&diagnostics).Execute(compile_args, &std::cerr);

}

JNIEXPORT jint JNICALL Java_com_android_tools_aapt2_Aapt2Jni_nativeLink(JNIEnv* env,

                                                                        jclass aapt_obj,

                                                                        jobject arguments_obj,

                                                                        jobject diagnostics_obj) {

  std::vector<ScopedUtfChars> link_args_jni =

      list_to_utfchars(env, arguments_obj);

  std::vector<StringPiece> link_args = extract_pieces(link_args_jni);

  JniDiagnostics diagnostics(env, diagnostics_obj);

  return aapt::LinkCommand(&diagnostics).Execute(link_args, &std::cerr);

}

JNIEXPORT void JNICALL Java_com_android_tools_aapt2_Aapt2Jni_ping(

        JNIEnv *env, jclass aapt_obj) {

  // This is just a no-op method to see if the library has been loaded.

}

/* DO NOT EDIT THIS FILE - it is machine generated */

#include <jni.h>

/* Header for class com_android_tools_aapt2_Aapt2Jni */

#ifndef _Included_com_android_tools_aapt2_Aapt2Jni

#define _Included_com_android_tools_aapt2_Aapt2Jni

#ifdef __cplusplus

extern "C" {

#endif

/*

 * Class:     com_android_tools_aapt2_Aapt2Jni

 * Method:    ping

 * Signature: ()V

 */

JNIEXPORT void JNICALL Java_com_android_tools_aapt2_Aapt2Jni_ping

  (JNIEnv *, jclass);

/*

 * Class:     com_android_tools_aapt2_Aapt2Jni

 * Method:    nativeCompile

 * Signature: (Ljava/util/List;Lcom/android/tools/aapt2/Aapt2JniDiagnostics;)I

 */

JNIEXPORT jint JNICALL Java_com_android_tools_aapt2_Aapt2Jni_nativeCompile(JNIEnv*, jclass, jobject,

                                                                           jobject);

/*

 * Class:     com_android_tools_aapt2_Aapt2Jni

 * Method:    nativeLink

 * Signature: (Ljava/util/List;Lcom/android/tools/aapt2/Aapt2JniDiagnostics;)I

 */

JNIEXPORT jint JNICALL Java_com_android_tools_aapt2_Aapt2Jni_nativeLink(JNIEnv*, jclass, jobject,

                                                                        jobject);

#ifdef __cplusplus

}

#endif

#endif