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| author | sky@google.com <sky@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2009-03-09 15:49:20 +0000 |
|---|---|---|
| committer | sky@google.com <sky@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2009-03-09 15:49:20 +0000 |
| commit | 0643a49e311c0ddb17f292f525ebd11f51f158a1 (patch) | |
| tree | de8f50c0070fd6ff52eced3bdd96c747f1e9ea45 /net/base/file_stream_posix.cc | |
| parent | f3e8965444b0b615ed8aabfcacc5840f6684c0c5 (diff) | |
| download | chromium_src-0643a49e311c0ddb17f292f525ebd11f51f158a1.zip chromium_src-0643a49e311c0ddb17f292f525ebd11f51f158a1.tar.gz chromium_src-0643a49e311c0ddb17f292f525ebd11f51f158a1.tar.bz2 | |
Adds truncate to FileStream.
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/39301
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@11245 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'net/base/file_stream_posix.cc')
| -rw-r--r-- | net/base/file_stream_posix.cc | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/net/base/file_stream_posix.cc b/net/base/file_stream_posix.cc index 34f7889..d7f4811 100644 --- a/net/base/file_stream_posix.cc +++ b/net/base/file_stream_posix.cc @@ -201,4 +201,21 @@ int FileStream::Write( return total_bytes_written; } +int64 FileStream::Truncate(int64 bytes) { + if (!IsOpen()) + return ERR_UNEXPECTED; + + // We better be open for reading. + DCHECK(open_flags_ & base::PLATFORM_FILE_WRITE); + + // Seek to the position to truncate from. + int64 seek_position = Seek(FROM_BEGIN, bytes); + if (seek_position != bytes) + return ERR_UNEXPECTED; + + // And truncate the file. + int result = ftruncate(file_, bytes); + return result == 0 ? seek_position : MapErrorCode(errno); +} + } // namespace net |