content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.jnifuse.utils;
  
  /**
   * This file mostly derived from rocksdb lib.
   */
  public class Environment {
    private static final String OS = System.getProperty("os.name").toLowerCase();
    private static final String ARCH = System.getProperty("os.arch").toLowerCase();
  
    public static boolean isAarch64() {
      return ARCH.contains("aarch64");
    }
  
    public static boolean isPowerPC() {
      return ARCH.contains("ppc");
    }
  
    public static boolean isS390x() {
      return ARCH.contains("s390x");
    }
  
    public static boolean isWindows() {
      return OS.contains("win");
    }
  
    public static boolean isFreeBSD() {
      return (OS.contains("freebsd"));
    }
  
    public static boolean isMac() {
      return (OS.contains("mac"));
    }
  
    public static boolean isAix() {
      return OS.contains("aix");
    }
  
    public static boolean isUnix() {
      return OS.contains("nix") || OS.contains("nux");
    }
  
    public static boolean isSolaris() {
      return OS.contains("sunos");
    }
  
    public static boolean isOpenBSD() {
      return (OS.contains("openbsd"));
    }
  
    public static boolean is64Bit() {
      if (ARCH.indexOf("sparcv9") >= 0) {
        return true;
      }
      return ARCH.indexOf("64") >= 0;
    }
  
    public static String getSharedLibraryName(final String name) {
      return name;
    }
  
    public static String getSharedLibraryFileName(final String name) {
      return appendLibOsSuffix("lib" + getSharedLibraryName(name), true);
    }
  
    public static String getJniLibraryName(final String name) {
      if (isUnix()) {
        final String arch = is64Bit() ? "64" : "32";
        if (isPowerPC() || isAarch64()) {
          return String.format("%sjni-linux-%s", name, ARCH);
        } else if (isS390x()) {
          return String.format("%sjni-linux%s", name, ARCH);
        } else {
          return String.format("%sjni-linux%s", name, arch);
        }
      } else if (isMac()) {
        return String.format("%sjni-osx", name);
      } else if (isFreeBSD()) {
        return String.format("%sjni-freebsd%s", name, is64Bit() ? "64" : "32");
      } else if (isAix() && is64Bit()) {
        return String.format("%sjni-aix64", name);
      } else if (isSolaris()) {
        final String arch = is64Bit() ? "64" : "32";
        return String.format("%sjni-solaris%s", name, arch);
      } else if (isWindows() && is64Bit()) {
        return String.format("%sjni-win64", name);
      } else if (isOpenBSD()) {
        return String.format("%sjni-openbsd%s", name, is64Bit() ? "64" : "32");
      }
  
      throw new UnsupportedOperationException(
          String.format("Cannot determine JNI library name for ARCH='%s' OS='%s' name='%s'",
              ARCH, OS, name));
    }
  
    public static String getJniLibraryFileName(final String name) {
      return appendLibOsSuffix("lib" + getJniLibraryName(name), false);
    }
  
    private static String appendLibOsSuffix(final String libraryFileName, final boolean shared) {
      if (isUnix() || isAix() || isSolaris() || isFreeBSD() || isOpenBSD()) {
        return libraryFileName + ".so";
      } else if (isMac()) {
        return libraryFileName + (shared ? ".dylib" : ".jnilib");
      } else if (isWindows()) {
        return libraryFileName + ".dll";
      }
      throw new UnsupportedOperationException();
    }
  
    public static String getJniLibraryExtension() {
      if (isWindows()) {
        return ".dll";
      }
      return isMac() ? ".jnilib" : ".so";
    }
  }
  