diff options
Diffstat (limited to 'libjava/java/io/natFileDescriptorWin32.cc')
| -rw-r--r-- | libjava/java/io/natFileDescriptorWin32.cc | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/libjava/java/io/natFileDescriptorWin32.cc b/libjava/java/io/natFileDescriptorWin32.cc index f72e39ce127..e004057ef91 100644 --- a/libjava/java/io/natFileDescriptorWin32.cc +++ b/libjava/java/io/natFileDescriptorWin32.cc @@ -1,6 +1,6 @@ // natFileDescriptorWin32.cc - Native part of FileDescriptor class. -/* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. +/* Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. This file is part of libgcj. @@ -186,6 +186,58 @@ java::io::FileDescriptor::close (void) throw new IOException (JvNewStringLatin1 (winerr ())); } +void +java::io::FileDescriptor::setLength(jlong pos) +{ + LONG liOrigFilePointer; + LONG liNewFilePointer; + LONG liEndFilePointer; + + // Get the original file pointer. + if (SetFilePointer((HANDLE) fd, (LONG) 0, &liOrigFilePointer, + FILE_CURRENT) != (BOOL) 0 + && (GetLastError() != NO_ERROR)) + throw new IOException (JvNewStringLatin1 (winerr ())); + + // Get the length of the file. + if (SetFilePointer((HANDLE) fd, (LONG) 0, &liEndFilePointer, + FILE_END) != (BOOL) 0 + && (GetLastError() != NO_ERROR)) + throw new IOException (JvNewStringLatin1 (winerr ())); + + if ((jlong)liEndFilePointer == pos) + { + // Restore the file pointer. + if (liOrigFilePointer != liEndFilePointer) + { + if (SetFilePointer((HANDLE) fd, liOrigFilePointer, &liNewFilePointer, + FILE_BEGIN) != (BOOL) 0 + && (GetLastError() != NO_ERROR)) + throw new IOException (JvNewStringLatin1 (winerr ())); + } + return; + } + + // Seek to the new end of file. + if (SetFilePointer((HANDLE) fd, (LONG) pos, &liNewFilePointer, + FILE_BEGIN) != (BOOL) 0 + && (GetLastError() != NO_ERROR)) + throw new IOException (JvNewStringLatin1 (winerr ())); + + // Truncate the file at this point. + if (SetEndOfFile((HANDLE) fd) != (BOOL) 0 && (GetLastError() != NO_ERROR)) + throw new IOException (JvNewStringLatin1 (winerr ())); + + if (liOrigFilePointer < liNewFilePointer) + { + // Restore the file pointer. + if (SetFilePointer((HANDLE) fd, liOrigFilePointer, &liNewFilePointer, + FILE_BEGIN) != (BOOL) 0 + && (GetLastError() != NO_ERROR)) + throw new IOException (JvNewStringLatin1 (winerr ())); + } +} + jint java::io::FileDescriptor::seek (jlong pos, jint whence, jboolean eof_trunc) { |
