corda/classpath/java-lang.cpp

/* Copyright (c) 2008-2012, Avian Contributors

   Permission to use, copy, modify, and/or distribute this software
   for any purpose with or without fee is hereby granted, provided
   that the above copyright notice and this permission notice appear
   in all copies.

   There is NO WARRANTY for this software.  See license.txt for
   details. */
   
#include "math.h"
#include "stdlib.h"
#include "time.h"
#include "string.h"
#include "stdio.h"
#include "jni.h"
#include "jni-util.h"
#include "errno.h"
#include "fcntl.h"
#include "ctype.h"

#ifdef PLATFORM_WINDOWS

#  include "windows.h"
#  include "winbase.h"
#  include "io.h"
#  include "tchar.h"
#  include "float.h"
#  include "sys/types.h"
#  include "sys/timeb.h"
#  define SO_PREFIX ""
#  define SO_SUFFIX ".dll"

#  ifdef _MSC_VER
#    define snprintf sprintf_s
#    define isnan _isnan
#    define isfinite _finite
#    define strtof strtod
#  endif

#else // not PLATFORM_WINDOWS

#  define SO_PREFIX "lib"
#  ifdef __APPLE__
#    define SO_SUFFIX ".jnilib"
#    ifndef ARCH_arm
#      include <CoreServices/CoreServices.h>
#    endif
#  else
#    define SO_SUFFIX ".so"
#  endif
#  include "unistd.h"
#  include "limits.h"
#  include "signal.h"
#  include "sys/time.h"
#  include "sys/types.h"
# ifndef __ANDROID__
#  include "sys/sysctl.h"
# endif
#  include "sys/utsname.h"
#  include "sys/wait.h"

#endif // not PLATFORM_WINDOWS

#ifndef WINAPI_FAMILY
#  ifndef WINAPI_PARTITION_DESKTOP
#    define WINAPI_PARTITION_DESKTOP 1
#  endif

#  ifndef WINAPI_FAMILY_PARTITION
#    define WINAPI_FAMILY_PARTITION(x) (x)
#  endif
#endif // WINAPI_FAMILY

namespace {
#ifdef PLATFORM_WINDOWS

#if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
  char* getErrorStr(DWORD err) {
    LPSTR errorStr = 0;
    if(!FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 0, err, LANG_SYSTEM_DEFAULT, (LPSTR)&errorStr, 0, 0))
    {
      char* errStr = (char*) malloc(9 * sizeof(char));
      snprintf(errStr, 9, "%d", (int) err);
      return errStr;
    }
    char* errStr = strdup(errorStr);
    LocalFree(errorStr);
    return errStr;
  }
#else
  char* getErrorStr(DWORD err) {
    LPSTR errorStr = (LPSTR)malloc(4096); //NOTE: something constant
    if(!FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 0, err, LANG_SYSTEM_DEFAULT, errorStr, 0, 0))
    {
      free(errorStr);

      char* errStr = (char*) malloc(9 * sizeof(char));
      snprintf(errStr, 9, "%d", (int) err);
      return errStr;
    }
    char* errStr = strdup(errorStr);
    free(errorStr);
    return errStr;
  }
#endif

#if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
  void makePipe(JNIEnv* e, HANDLE p[2])
  {
    SECURITY_ATTRIBUTES sa;
    sa.nLength = sizeof(sa);
    sa.bInheritHandle = 1;
    sa.lpSecurityDescriptor = 0;
  
    BOOL success = CreatePipe(p, p + 1, &sa, 0);
    if (not success) {
      throwNew(e, "java/io/IOException", getErrorStr(GetLastError()));
    }
  }
#endif
  
  int descriptor(JNIEnv* e, HANDLE h)
  {
    int fd = _open_osfhandle(reinterpret_cast<intptr_t>(h), 0);
    if (fd == -1) {
      throwNewErrno(e, "java/io/IOException");
    }
    return fd;
  }
#else
  void makePipe(JNIEnv* e, int p[2])
  {
    if(pipe(p) != 0) {
      throwNewErrno(e, "java/io/IOException");
    }
  }
  
  void safeClose(int &fd)
  {
    if(fd != -1) close(fd);
    fd = -1;
  }
  
  void close(int p[2])
  {
    ::close(p[0]);
    ::close(p[1]);
  }
  
  void clean(JNIEnv* e, jobjectArray command, char** p)
  {
    int i = 0;
    for(char** x = p; *x; ++x, ++i){
      jstring element = (jstring) e->GetObjectArrayElement(command, i);
      e->ReleaseStringUTFChars(element, *x);
    }
    free(p);
  }
#endif  
}

class Locale { // represents an ISO two-char language/country pair
  static const unsigned FIELDLEN = 2;
  static const unsigned FIELDSIZE = FIELDLEN + 1;

  static const char* DEFAULT_LANGUAGE;
  static const char* DEFAULT_REGION;

  char language[FIELDSIZE];
  char region[FIELDSIZE];

  bool isLanguage(const char* language) {
    if (!language) return false;
    unsigned len = strlen(language);
    if (len != FIELDLEN) return false;
    const char* p = language - 1;
    while (islower(*++p)) ;
    if (*p != '\0') return false;
    return true;
  }

  bool isRegion(const char* region) {
    if (!region) return false;
    unsigned len = strlen(region);
    if (len != FIELDLEN) return false;
    const char* p = region - 1;
    while (isupper(*++p)) ;
    if (*p != '\0') return false;
    return true;
  }

public:
  Locale(const char* language = "") {
    Locale l(language, "");
    *this = l;
  }

  Locale(const char* language, const char* region) {
    language = isLanguage(language) ? language : DEFAULT_LANGUAGE;
    region = isRegion(region) ? region : DEFAULT_REGION;
    memcpy(this->language, language, FIELDSIZE);
    memcpy(this->region, region, FIELDSIZE);
  }

  Locale& operator=(const Locale& l) {
    memcpy(language, l.language, FIELDSIZE);
    memcpy(region, l.region, FIELDSIZE);
    return *this;
  }

  const char* getLanguage() { return reinterpret_cast<const char*>(language); }
  const char* getRegion() { return reinterpret_cast<const char*>(region); }
};
const char* Locale::DEFAULT_LANGUAGE = "en";
const char* Locale::DEFAULT_REGION = "";

#ifdef PLATFORM_WINDOWS
extern "C" JNIEXPORT void JNICALL 
Java_java_lang_Runtime_exec(JNIEnv* e, jclass, 
                            jobjectArray command, jlongArray process)
{
#if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
  int size = 0;
  for (int i = 0; i < e->GetArrayLength(command); ++i){
    jstring element = (jstring) e->GetObjectArrayElement(command, i);
    size += e->GetStringUTFLength(element) + 1;
  } 
   
  RUNTIME_ARRAY(char, line, size);
  char* linep = RUNTIME_ARRAY_BODY(line);
  for (int i = 0; i < e->GetArrayLength(command); ++i) {
    if (i) *(linep++) = _T(' ');
    jstring element = (jstring) e->GetObjectArrayElement(command, i);
    const char* s =  e->GetStringUTFChars(element, 0);
#ifdef _MSC_VER
    _tcscpy_s(linep, size - (linep - RUNTIME_ARRAY_BODY(line)), s);
#else
    _tcscpy(linep, s);
#endif
    e->ReleaseStringUTFChars(element, s);
    linep += e->GetStringUTFLength(element);
  }
  *(linep++) = _T('\0');
 
  HANDLE in[] = { 0, 0 };
  HANDLE out[] = { 0, 0 };
  HANDLE err[] = { 0, 0 };
  
  makePipe(e, in);
  SetHandleInformation(in[0], HANDLE_FLAG_INHERIT, 0);
  jlong inDescriptor = static_cast<jlong>(descriptor(e, in[0]));
  if(e->ExceptionCheck()) return;
  e->SetLongArrayRegion(process, 2, 1, &inDescriptor);
  makePipe(e, out);
  SetHandleInformation(out[1], HANDLE_FLAG_INHERIT, 0);
  jlong outDescriptor = static_cast<jlong>(descriptor(e, out[1]));
  if(e->ExceptionCheck()) return;
  e->SetLongArrayRegion(process, 3, 1, &outDescriptor);
  makePipe(e, err);
  SetHandleInformation(err[0], HANDLE_FLAG_INHERIT, 0);
  jlong errDescriptor = static_cast<jlong>(descriptor(e, err[0]));
  if(e->ExceptionCheck()) return;
  e->SetLongArrayRegion(process, 4, 1, &errDescriptor);
  
  PROCESS_INFORMATION pi;
  ZeroMemory(&pi, sizeof(pi));
 
  STARTUPINFO si;
  ZeroMemory(&si, sizeof(si));
  si.cb = sizeof(si);
  si.dwFlags = STARTF_USESTDHANDLES;
  si.hStdOutput = in[1];
  si.hStdInput = out[0];
  si.hStdError = err[1];
 
  BOOL success = CreateProcess(0, (LPSTR) RUNTIME_ARRAY_BODY(line), 0, 0, 1,
                               CREATE_NO_WINDOW | CREATE_UNICODE_ENVIRONMENT,
                               0, 0, &si, &pi);

  CloseHandle(in[1]);
  CloseHandle(out[0]);
  CloseHandle(err[1]);
  
  if (not success) {
    throwNew(e, "java/io/IOException", getErrorStr(GetLastError()));
    return;
  }
  
  jlong pid = reinterpret_cast<jlong>(pi.hProcess);
  e->SetLongArrayRegion(process, 0, 1, &pid);
  jlong tid = reinterpret_cast<jlong>(pi.hThread);  
  e->SetLongArrayRegion(process, 1, 1, &tid);
#else
  throwNew(e, "java/io/Exception", strdup("Not supported on WinRT/WinPhone8"));
#endif
}

extern "C" JNIEXPORT jint JNICALL 
Java_java_lang_Runtime_waitFor(JNIEnv* e, jclass, jlong pid, jlong tid)
{
#if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
  DWORD exitCode;
  WaitForSingleObject(reinterpret_cast<HANDLE>(pid), INFINITE);
  BOOL success = GetExitCodeProcess(reinterpret_cast<HANDLE>(pid), &exitCode);
  if(not success){
    throwNew(e, "java/lang/Exception", getErrorStr(GetLastError()));
  }

  CloseHandle(reinterpret_cast<HANDLE>(pid));
  CloseHandle(reinterpret_cast<HANDLE>(tid));

  return exitCode;
#else
  throwNew(e, "java/io/Exception", strdup("Not supported on WinRT/WinPhone8"));
  return -1;
#endif
}

extern "C" JNIEXPORT void JNICALL
Java_java_lang_Runtime_kill(JNIEnv* e UNUSED, jclass, jlong pid) {
#if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
  TerminateProcess(reinterpret_cast<HANDLE>(pid), 1);
#else
  throwNew(e, "java/io/Exception", strdup("Not supported on WinRT/WinPhone8"));
#endif
}

Locale getLocale() {
#if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
  const char* lang = "";
  const char* reg = "";
  unsigned langid = GetUserDefaultUILanguage();
  unsigned prilang = langid & 0x3ff;
  unsigned sublang = langid >> 10;

  switch (prilang) {
    case 0x004: {
      lang = "zh";
      switch (sublang) {
        case 0x01: reg = "CN"; break;
        case 0x02: reg = "TW"; break;
        case 0x03: reg = "HK"; break;
        case 0x04: reg = "SG"; break;
      }
    } break;
    case 0x006: lang = "da"; reg = "DK"; break;
    case 0x007: lang = "de"; reg = "DE"; break;
    case 0x009: {
      lang = "en";
      switch (sublang) {
        case 0x01: reg = "US"; break;
        case 0x02: reg = "GB"; break;
        case 0x03: reg = "AU"; break;
        case 0x04: reg = "CA"; break;
        case 0x05: reg = "NZ"; break;
        case 0x06: reg = "IE"; break;
        case 0x07: reg = "ZA"; break;
        case 0x10: reg = "IN"; break;
      }
    } break;
    case 0x00a: {
      lang = "es";
      switch (sublang) {
        case 0x01: case 0x03: reg = "ES"; break;
        case 0x02: reg = "MX"; break;
      }
    } break;
    case 0x00c: {
      lang = "fr";
      switch (sublang) {
        case 0x01: reg = "FR"; break;
        case 0x02: reg = "BE"; break;
        case 0x03: reg = "CA"; break;
      }
    } break;
    case 0x010: lang = "it"; reg = "IT"; break;
    case 0x011: lang = "ja"; reg = "JP"; break;
    case 0x012: lang = "ko"; reg = "KR"; break;
    case 0x013: {
      lang = "nl";
      switch (sublang) {
        case 0x01: reg = "NL"; break;
        case 0x02: reg = "BE"; break;
      }
    } break;
    case 0x014: lang = "no"; reg = "NO"; break;
    case 0x015: lang = "pl"; reg = "PL"; break;
    case 0x016: {
      lang = "pt";
      switch (sublang) {
        case 0x01: reg = "BR"; break;
        case 0x02: reg = "PT"; break;
      }
    } break;
    case 0x018: lang = "ro"; reg = "RO"; break;
    case 0x019: lang = "ru"; reg = "RU"; break;
    case 0x01d: lang = "sv"; reg = "SE"; break;
    default: lang = "en";
  }

  return Locale(lang, reg);
#else
  #pragma message("TODO: CultureInfo.CurrentCulture")
  return Locale("en", "US");
#endif
}
#else
extern "C" JNIEXPORT void JNICALL 
Java_java_lang_Runtime_exec(JNIEnv* e, jclass, 
                            jobjectArray command, jlongArray process)
{
  char** argv = static_cast<char**>
    (malloc((e->GetArrayLength(command) + 1) * sizeof(char*)));
  int i;
  for(i = 0; i < e->GetArrayLength(command); i++){
    jstring element = (jstring) e->GetObjectArrayElement(command, i);
    char* s = const_cast<char*>(e->GetStringUTFChars(element, 0));
    argv[i] = s;
  }
  argv[i] = 0;
  
  int in[] = { -1, -1 };
  int out[] = { -1, -1 };
  int err[] = { -1, -1 };
  int msg[] = { -1, -1 };
  
  makePipe(e, in);
  if(e->ExceptionCheck()) return;
  jlong inDescriptor = static_cast<jlong>(in[0]);
  e->SetLongArrayRegion(process, 2, 1, &inDescriptor);
  makePipe(e, out);
  if(e->ExceptionCheck()) return;
  jlong outDescriptor = static_cast<jlong>(out[1]);
  e->SetLongArrayRegion(process, 3, 1, &outDescriptor);
  makePipe(e, err);
  if(e->ExceptionCheck()) return;
  jlong errDescriptor = static_cast<jlong>(err[0]);
  e->SetLongArrayRegion(process, 4, 1, &errDescriptor);
  makePipe(e, msg);
  if(e->ExceptionCheck()) return;
  if(fcntl(msg[1], F_SETFD, FD_CLOEXEC) != 0) {
    throwNewErrno(e, "java/io/IOException");
    return;
  }
  
#ifdef __QNX__
  // fork(2) doesn't work in multithreaded QNX programs.  See
  // http://www.qnx.com/developers/docs/6.4.1/neutrino/getting_started/s1_procs.html
  pid_t pid = vfork();
#else
  // We might be able to just use vfork on all UNIX-style systems, but
  // the manual makes it sound dangerous due to the shared
  // parent/child address space, so we use fork if we can.
  pid_t pid = fork();
#endif
  switch(pid){
  case -1: // error
    throwNewErrno(e, "java/io/IOException");
    return;
  case 0: { // child
    // Setup stdin, stdout and stderr
    dup2(in[1], 1);
    close(in);
    dup2(out[0], 0);
    close(out);
    dup2(err[1], 2);
    close(err);
    close(msg[0]);
    
    execvp(argv[0], argv);
    
    // Error if here
    int val = errno;
    ssize_t rv UNUSED = write(msg[1], &val, sizeof(val));
    exit(127);
  } break;
    
  default: { //parent
    jlong JNIPid = static_cast<jlong>(pid);
    e->SetLongArrayRegion(process, 0, 1, &JNIPid);
    
    safeClose(in[1]);
    safeClose(out[0]);
    safeClose(err[1]);
    safeClose(msg[1]);
      
    int val;
    int r = read(msg[0], &val, sizeof(val));
    if(r == -1) {
      throwNewErrno(e, "java/io/IOException");
      return;
    } else if(r) {
      errno = val;
      throwNewErrno(e, "java/io/IOException");
      return;
    }
  } break;
  }
  
  safeClose(msg[0]);
  clean(e, command, argv);
  
  fcntl(in[0], F_SETFD, FD_CLOEXEC);
  fcntl(out[1], F_SETFD, FD_CLOEXEC);
  fcntl(err[0], F_SETFD, FD_CLOEXEC);
}

extern "C" JNIEXPORT jint JNICALL 
Java_java_lang_Runtime_waitFor(JNIEnv*, jclass, jlong pid, jlong)
{
  bool finished = false;
  int status;
  int exitCode;
  while(!finished){
    waitpid(pid, &status, 0);
    if(WIFEXITED(status)){
      finished = true;
      exitCode = WEXITSTATUS(status);
    } else if(WIFSIGNALED(status)){
      finished = true;
      exitCode = -1;
    }
  }
  
  return exitCode;
}

extern "C" JNIEXPORT void JNICALL
Java_java_lang_Runtime_kill(JNIEnv*, jclass, jlong pid) {
  kill((pid_t)pid, SIGTERM);
}

Locale getLocale() {
  Locale fallback;

  const char* LANG = getenv("LANG");
  if (!LANG || strcmp(LANG, "C") == 0) return fallback;

  int len = strlen(LANG);
  char buf[len + 1]; // + 1 for the '\0' char
  memcpy(buf, LANG, len + 1);

  char* tracer = buf;
  const char* reg;

  while (*tracer && *tracer != '_') ++tracer;
  if (!*tracer) return fallback;
  *tracer = '\0';
  reg = ++tracer;

  while (*tracer && *tracer != '.') ++tracer;
  if (tracer == reg) return fallback;
  *tracer = '\0';

  Locale locale(buf, reg);
  return locale;
}
#endif

extern "C" JNIEXPORT jstring JNICALL
Java_java_lang_System_getProperty(JNIEnv* e, jclass, jstring name,
                                  jbooleanArray found)
{
  jstring r = 0;
  const char* chars = e->GetStringUTFChars(name, 0);
  if (chars) {
#ifdef PLATFORM_WINDOWS 
    if (strcmp(chars, "line.separator") == 0) {
      r = e->NewStringUTF("\r\n");
    } else if (strcmp(chars, "file.separator") == 0) {
      r = e->NewStringUTF("\\");
    } else if (strcmp(chars, "os.name") == 0) {
#  if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
      r = e->NewStringUTF("Windows");
#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE)
      r = e->NewStringUTF("Windows Phone");
#  else
      r = e->NewStringUTF("Windows RT");
#  endif
    } else if (strcmp(chars, "os.version") == 0) {
#  if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
      unsigned size = 32;
      RUNTIME_ARRAY(char, buffer, size);
      OSVERSIONINFO OSversion;
      OSversion.dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
      ::GetVersionEx(&OSversion);
      snprintf(RUNTIME_ARRAY_BODY(buffer), size, "%i.%i", (int)OSversion.dwMajorVersion, (int)OSversion.dwMinorVersion);
      r = e->NewStringUTF(RUNTIME_ARRAY_BODY(buffer));
#  else
      // Currently there is no alternative on WinRT/WP8
      r = e->NewStringUTF("8.0");
#  endif
    } else if (strcmp(chars, "os.arch") == 0) {
#ifdef ARCH_x86_32
      r = e->NewStringUTF("x86");
#elif defined ARCH_x86_64
      r = e->NewStringUTF("x86_64");
#elif defined ARCH_powerpc
      r = e->NewStringUTF("ppc");
#elif defined ARCH_arm
      r = e->NewStringUTF("arm");
#endif
    } else if (strcmp(chars, "java.io.tmpdir") == 0) {
#  if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
      TCHAR buffer[MAX_PATH];
      GetTempPath(MAX_PATH, buffer);
      r = e->NewStringUTF(buffer);
#  else
      #pragma message("TODO:http://lunarfrog.com/blog/2012/05/21/winrt-folders-access/ Windows.Storage.ApplicationData.Current.TemporaryFolder")
      r = 0;
#  endif
    } else if (strcmp(chars, "user.dir") == 0) {
#  if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
      TCHAR buffer[MAX_PATH];
      GetCurrentDirectory(MAX_PATH, buffer);
      r = e->NewStringUTF(buffer);
#  else
      #pragma message("TODO:http://lunarfrog.com/blog/2012/05/21/winrt-folders-access/ Windows.ApplicationModel.Package.Current.InstalledLocation")
      r = 0;
#  endif
    } else if (strcmp(chars, "user.home") == 0) {
#  ifdef _MSC_VER
#    if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
      WCHAR buffer[MAX_PATH];
      size_t needed;
      if (_wgetenv_s(&needed, buffer, MAX_PATH, L"USERPROFILE") == 0) {
        r = e->NewString(reinterpret_cast<jchar*>(buffer), lstrlenW(buffer));
      } else {
        r = 0;
      }
#    else
      #pragma message("TODO:http://lunarfrog.com/blog/2012/05/21/winrt-folders-access/ Windows.Storage.KnownFolders.DocumentsLibrary")
      r = 0;
#    endif
#  else
      LPWSTR home = _wgetenv(L"USERPROFILE");
      r = e->NewString(reinterpret_cast<jchar*>(home), lstrlenW(home));
#  endif
    }
#else
    if (strcmp(chars, "line.separator") == 0) {
      r = e->NewStringUTF("\n");
    } else if (strcmp(chars, "file.separator") == 0) {
      r = e->NewStringUTF("/");
    } else if (strcmp(chars, "os.name") == 0) {
#ifdef __APPLE__
      r = e->NewStringUTF("Mac OS X");
#elif defined __FreeBSD__
      r = e->NewStringUTF("FreeBSD");
#else
      r = e->NewStringUTF("Linux");
#endif
    } else if (strcmp(chars, "os.version") == 0) {
#if (defined __APPLE__) && (! defined AVIAN_IOS)
      unsigned size = 32;
      char buffer[size];
#ifdef ARCH_x86_64
      int32_t minorVersion, majorVersion;
#else
      long minorVersion, majorVersion;
#endif
      
      Gestalt(gestaltSystemVersionMajor, &majorVersion);
      Gestalt(gestaltSystemVersionMinor, &minorVersion);
      
      snprintf(buffer, size, "%d.%d", static_cast<int32_t>(majorVersion),
               static_cast<int32_t>(minorVersion));
      r = e->NewStringUTF(buffer);
#else
      struct utsname system_id; 
      uname(&system_id);
      r = e->NewStringUTF(system_id.release);
#endif
    } else if (strcmp(chars, "os.arch") == 0) {
#ifdef ARCH_x86_32
      r = e->NewStringUTF("x86");
#elif defined ARCH_x86_64
      r = e->NewStringUTF("x86_64");
#elif defined ARCH_powerpc
      r = e->NewStringUTF("ppc");
#elif defined ARCH_arm
      r = e->NewStringUTF("arm");
#endif
    } else if (strcmp(chars, "java.io.tmpdir") == 0) {
      r = e->NewStringUTF("/tmp");
    } else if (strcmp(chars, "user.dir") == 0) {
      char buffer[PATH_MAX];
      r = e->NewStringUTF(getcwd(buffer, PATH_MAX));
    } else if (strcmp(chars, "user.home") == 0) {
      r = e->NewStringUTF(getenv("HOME"));
    }
#endif
    else if (strcmp(chars, "user.language") == 0) {
      Locale locale = getLocale();
      if (strlen(locale.getLanguage())) r = e->NewStringUTF(locale.getLanguage());
    } else if (strcmp(chars, "user.region") == 0) {
      Locale locale = getLocale();
      if (strlen(locale.getRegion())) r = e->NewStringUTF(locale.getRegion());
    }

    e->ReleaseStringUTFChars(name, chars);
  }

  if (r) {
    jboolean v = true;
    e->SetBooleanArrayRegion(found, 0, 1, &v);
  }

  return r;
}

// System.getEnvironment() implementation
// TODO: For Win32, replace usage of deprecated _environ and add Unicode
// support (neither of which is likely to be of great importance).
#ifdef AVIAN_IOS
namespace {
  const char* environ[] = { 0 };
}
#elif defined __APPLE__
#  include <crt_externs.h>
#  define environ (*_NSGetEnviron())
#elif defined(WINAPI_FAMILY) && !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
// WinRT/WP8 does not provide alternative for environment variables
char* environ[] = { 0 };
#else
extern char** environ;
#endif
extern "C" JNIEXPORT jobjectArray JNICALL
Java_java_lang_System_getEnvironment(JNIEnv* env, jclass) {
  int length;
  for (length = 0; environ[length] != 0; ++length) ;

  jobjectArray stringArray =
    env->NewObjectArray(length, env->FindClass("java/lang/String"),
                        env->NewStringUTF(""));

  for (int i = 0; i < length; i++) {
    jobject varString = env->NewStringUTF(environ[i]);
    env->SetObjectArrayElement(stringArray, i, varString);
  }

  return stringArray;
}

extern "C" JNIEXPORT jlong JNICALL
Java_java_lang_System_currentTimeMillis(JNIEnv*, jclass)
{
#ifdef PLATFORM_WINDOWS
  // We used to use _ftime here, but that only gives us 1-second
  // resolution on Windows 7.  _ftime_s might work better, but MinGW
  // doesn't have it as of this writing.  So we use this mess instead:
  FILETIME time;
  GetSystemTimeAsFileTime(&time);
  return (((static_cast<jlong>(time.dwHighDateTime) << 32)
           | time.dwLowDateTime) / 10000) - 11644473600000LL;
#else
  timeval tv = { 0, 0 };
  gettimeofday(&tv, 0);
  return (static_cast<jlong>(tv.tv_sec) * 1000) +
    (static_cast<jlong>(tv.tv_usec) / 1000);
#endif
}

extern "C" JNIEXPORT jstring JNICALL
Java_java_lang_System_doMapLibraryName(JNIEnv* e, jclass, jstring name)
{
  jstring r = 0;
  const char* chars = e->GetStringUTFChars(name, 0);
  if (chars) {
    unsigned nameLength = strlen(chars);
    unsigned size = sizeof(SO_PREFIX) + nameLength + sizeof(SO_SUFFIX);
    RUNTIME_ARRAY(char, buffer, size);
    snprintf
      (RUNTIME_ARRAY_BODY(buffer), size, SO_PREFIX "%s" SO_SUFFIX, chars);
    r = e->NewStringUTF(RUNTIME_ARRAY_BODY(buffer));

    e->ReleaseStringUTFChars(name, chars);
  }
  return r;
}

extern "C" JNIEXPORT jboolean JNICALL
Java_java_lang_Double_isInfinite(JNIEnv*, jclass, jdouble val)
{
  return !isfinite(val);
}

extern "C" JNIEXPORT jboolean JNICALL
Java_java_lang_Double_isNaN(JNIEnv*, jclass, jdouble val)
{
  return isnan(val);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Double_doubleFromString(JNIEnv*e, jclass, jstring s,
				       jintArray numDoublesRead)
{
  const char* chars = e->GetStringUTFChars(s, 0);
  double d = 0.0;
  jint numRead = 0;

  if (chars) {
    char* lastRead;
    d = strtod(chars, &lastRead);
    if ((lastRead != chars) && ((chars + strlen(chars)) == lastRead)) {
      numRead = 1;
    }
    e->ReleaseStringUTFChars(s, chars);
  }
  e->SetIntArrayRegion(numDoublesRead, 0, 1, &numRead);
  return d;
}

extern "C" JNIEXPORT jboolean JNICALL
Java_java_lang_Float_isInfinite(JNIEnv*, jclass, jfloat val)
{
  return !isfinite(val);
}

extern "C" JNIEXPORT jboolean JNICALL
Java_java_lang_Float_isNaN(JNIEnv*, jclass, jfloat val)
{
  return isnan(val);
}

extern "C" JNIEXPORT jfloat JNICALL
Java_java_lang_Float_floatFromString(JNIEnv*e, jclass, jstring s,
				     jintArray numFloatsRead)
{
  const char* chars = e->GetStringUTFChars(s, 0);
  float f = 0.0;
  jint numRead = 0;

  if (chars) {
    char* lastRead;
    f = strtof(chars, &lastRead);
    if ((lastRead != chars) && ((chars + strlen(chars)) == lastRead)) {
      numRead = 1;
    }
    e->ReleaseStringUTFChars(s, chars);
  }
  e->SetIntArrayRegion(numFloatsRead, 0, 1, &numRead);
  return f;
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_sin(JNIEnv*, jclass, jdouble val)
{
  return sin(val);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_cos(JNIEnv*, jclass, jdouble val)
{
  return cos(val);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_tan(JNIEnv*, jclass, jdouble val)
{
  return tan(val);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_asin(JNIEnv*, jclass, jdouble val)
{
  return asin(val);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_acos(JNIEnv*, jclass, jdouble val)
{
  return acos(val);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_atan(JNIEnv*, jclass, jdouble val)
{
  return atan(val);
}


extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_sinh(JNIEnv*, jclass, jdouble val)
{
  return sinh(val);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_cosh(JNIEnv*, jclass, jdouble val)
{
  return cosh(val);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_tanh(JNIEnv*, jclass, jdouble val)
{
  return tanh(val);
}


extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_sqrt(JNIEnv*, jclass, jdouble val)
{
  return sqrt(val);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_pow(JNIEnv*, jclass, jdouble val, jdouble exp)
{
  return pow(val, exp);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_log(JNIEnv*, jclass, jdouble val)
{
  return log(val);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_floor(JNIEnv*, jclass, jdouble val)
{
  return floor(val);
}

extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_ceil(JNIEnv*, jclass, jdouble val)
{
  return ceil(val);
}

extern "C" JNIEXPORT jint JNICALL
Java_java_lang_Double_fillBufferWithDouble(JNIEnv* e, jclass, jdouble val,
					   jbyteArray buffer, jint bufferSize) {
  jboolean isCopy;
  jbyte* buf = e->GetByteArrayElements(buffer, &isCopy);
  jint count = snprintf(reinterpret_cast<char*>(buf), bufferSize, "%g", val);
  e->ReleaseByteArrayElements(buffer, buf, 0);
  return count;
}