libjava/java/io/natFileDescriptorEcos.cc

   1 // natFileDescriptor.cc - Native part of FileDescriptor class.
   2
   3 /* Copyright (C) 1998, 1999, 2001, 2002  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 #include <config.h>
  12
  13 #include <errno.h>
  14 #include <string.h>
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17 #include <sys/param.h>
  18
  19 #include <gcj/cni.h>
  20 #include <jvm.h>
  21 #include <java/io/FileDescriptor.h>
  22 #include <java/io/SyncFailedException.h>
  23 #include <java/io/IOException.h>
  24 #include <java/io/EOFException.h>
  25 #include <java/lang/ArrayIndexOutOfBoundsException.h>
  26 #include <java/lang/NullPointerException.h>
  27 #include <java/lang/String.h>
  28 #include <java/io/FileNotFoundException.h>
  29
  30 extern "C" void diag_write_char (char c);
  31
  32 static void
  33 diag_write (char *data, int len)
  34 {
  35   while (len > 0)
  36     {
  37       diag_write_char (*data++);
  38       len--;
  39     }
  40 }
  41
  42 #define NO_FSYNC_MESSAGE "sync unsupported"
  43
  44 void
  45 java::io::FileDescriptor::init(void)
  46 {
  47   in = new java::io::FileDescriptor(0);
  48   out = new java::io::FileDescriptor(1);
  49   err = new java::io::FileDescriptor(2);
  50 }
  51
  52 jboolean
  53 java::io::FileDescriptor::valid (void)
  54 {
  55   return true;
  56 }
  57
  58 void
  59 java::io::FileDescriptor::sync (void)
  60 {
  61   // Some files don't support fsync.  We don't bother reporting these
  62   // as errors.
  63 #ifdef HAVE_FSYNC
  64 #else
  65   throw new SyncFailedException (JvNewStringLatin1 (NO_FSYNC_MESSAGE));
  66 #endif
  67 }
  68
  69 jint
  70 java::io::FileDescriptor::open (jstring path, jint jflags)
  71 {
  72   return fd;
  73 }
  74
  75 void
  76 java::io::FileDescriptor::write (jint b)
  77 {
  78   char d = (char) b;
  79   ::diag_write (&d, 1);
  80 }
  81
  82 void
  83 java::io::FileDescriptor::write (jbyteArray b, jint offset, jint len)
  84 {
  85   if (! b)
  86     throw new java::lang::NullPointerException;
  87   if (offset < 0 || len < 0 || offset + len > JvGetArrayLength (b))
  88     throw new java::lang::ArrayIndexOutOfBoundsException;
  89   char *bytes = (char *)elements (b) + offset;
  90   ::diag_write (bytes, len);
  91 }
  92
  93 void
  94 java::io::FileDescriptor::close (void)
  95 {
  96 }
  97
  98 void
  99 java::io::FileDescriptor::setLength (long)
 100 {
 101 }
 102
 103 jint
 104 java::io::FileDescriptor::seek (jlong pos, jint whence, jboolean)
 105 {
 106   JvAssert (whence == SET || whence == CUR);
 107   return 0;
 108 }
 109
 110 jlong
 111 java::io::FileDescriptor::getLength (void)
 112 {
 113   return 0;
 114 }
 115
 116 jlong
 117 java::io::FileDescriptor::getFilePointer (void)
 118 {
 119   return 0;
 120 }
 121
 122 jint
 123 java::io::FileDescriptor::read (void)
 124 {
 125   return 0;
 126 }
 127
 128 jint
 129 java::io::FileDescriptor::read (jbyteArray buffer, jint offset, jint count)
 130 {
 131   return 0;
 132 }
 133
 134 jint
 135 java::io::FileDescriptor::available (void)
 136 {
 137   return 0;
 138 }