/*
 * Copyright (C) 2012 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 "utils_llvm.h"

#include <fcntl.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include "android/librsloader.h"
#include "class_loader.h"
#include "object.h"
#include "object_utils.h"
#include "runtime_support_llvm.h"

namespace art {

std::string MangleForLLVM(const std::string& s) {
  std::string result;
  size_t char_count = CountModifiedUtf8Chars(s.c_str());
  const char* cp = &s[0];
  for (size_t i = 0; i < char_count; ++i) {
    uint16_t ch = GetUtf16FromUtf8(&cp);
    if (ch == '$' || ch == '<' || ch == '>' || ch > 127) {
      StringAppendF(&result, "_0%04x", ch);
    } else {
      switch (ch) {
      case '_':
        result += "_1";
        break;
      case ';':
        result += "_2";
        break;
      case '[':
        result += "_3";
        break;
      case '/':
        result += "_";
        break;
      default:
        result.push_back(ch);
        break;
      }
    }
  }
  return result;
}

std::string LLVMShortName(const Method* m) {
  MethodHelper mh(m);
  std::string class_name(mh.GetDeclaringClassDescriptor());
  // Remove the leading 'L' and trailing ';'...
  CHECK_EQ(class_name[0], 'L') << class_name;
  CHECK_EQ(class_name[class_name.size() - 1], ';') << class_name;
  class_name.erase(0, 1);
  class_name.erase(class_name.size() - 1, 1);

  std::string method_name(mh.GetName());

  std::string short_name;
  short_name += "Art_";
  short_name += MangleForLLVM(class_name);
  short_name += "_";
  short_name += MangleForLLVM(method_name);
  return short_name;
}

std::string LLVMLongName(const Method* m) {
  std::string long_name;
  long_name += LLVMShortName(m);
  long_name += "__";

  std::string signature(MethodHelper(m).GetSignature());
  signature.erase(0, 1);
  signature.erase(signature.begin() + signature.find(')'), signature.end());

  long_name += MangleForLLVM(signature);

  return long_name;
}

std::string LLVMStubName(const Method* m) {
  MethodHelper mh(m);
  std::string stub_name;
  if (m->IsStatic()) {
    stub_name += "ArtSUpcall_";
  } else {
    stub_name += "ArtUpcall_";
  }
  stub_name += mh.GetShorty();

  return stub_name;
}

}  // namespace art