rcfileio.cpp

Netscape NSPR库源码

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Netscape Portable Runtime (NSPR).
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are 
 * Copyright (C) 1998-2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by
 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 */

/*
** Class implementation for normal and special file I/O (ref: prio.h)
*/

#include "rcfileio.h"

#include <string.h>

RCFileIO::RCFileIO(): RCIO(RCIO::file) { }

RCFileIO::~RCFileIO() { if (NULL != fd) (void)Close(); }

PRInt64 RCFileIO::Available()
    { return fd->methods->available(fd); }

PRStatus RCFileIO::Close()
    { PRStatus rv = fd->methods->close(fd); fd = NULL; return rv; }

PRStatus RCFileIO::Delete(const char* filename) { return PR_Delete(filename); }

PRStatus RCFileIO::FileInfo(RCFileInfo* info) const
    { return fd->methods->fileInfo64(fd, &info->info); }

PRStatus RCFileIO::FileInfo(const char *name, RCFileInfo* info)
    { return PR_GetFileInfo64(name, &info->info); }

PRStatus RCFileIO::Fsync()
    { return fd->methods->fsync(fd); }

PRStatus RCFileIO::Open(const char *filename, PRIntn flags, PRIntn mode)
{
    fd = PR_Open(filename, flags, mode);
    return (NULL == fd) ? PR_FAILURE : PR_SUCCESS;
}  /* RCFileIO::Open */

PRInt32 RCFileIO::Read(void *buf, PRSize amount)
    { return fd->methods->read(fd, buf, amount); }

PRInt64 RCFileIO::Seek(PRInt64 offset, RCIO::Whence how)
{
    PRSeekWhence whence;
    switch (how)
    {
        case RCFileIO::set: whence = PR_SEEK_SET; break;
        case RCFileIO::current: whence = PR_SEEK_CUR; break;
        case RCFileIO::end: whence = PR_SEEK_END; break;
        default: whence = (PRSeekWhence)-1;
    }
    return fd->methods->seek64(fd, offset, whence);
}  /* RCFileIO::Seek */

PRInt32 RCFileIO::Write(const void *buf, PRSize amount)
    { return fd->methods->write(fd, buf, amount); }

PRInt32 RCFileIO::Writev(
    const PRIOVec *iov, PRSize size, const RCInterval& timeout)
    { return fd->methods->writev(fd, iov, size, timeout); }

RCIO *RCFileIO::GetSpecialFile(RCFileIO::SpecialFile special)
{
    PRFileDesc* fd;
    PRSpecialFD which;
    RCFileIO* spec = NULL;

    switch (special)
    {
        case RCFileIO::input: which = PR_StandardInput; break;
        case RCFileIO::output: which = PR_StandardOutput; break;
        case RCFileIO::error: which = PR_StandardError; break;
        default: which = (PRSpecialFD)-1;
    }
    fd = PR_GetSpecialFD(which);
    if (NULL != fd)
    {
        spec = new RCFileIO();
        if (NULL != spec) spec->fd = fd;
    }
    return spec;
}  /* RCFileIO::GetSpecialFile */


/*
** The following methods have been made non-virtual and private. These
** default implementations are intended to NEVER be called. They
** are not valid for this type of I/O class (normal and special file).
*/
PRStatus RCFileIO::Connect(const RCNetAddr&, const RCInterval&)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return PR_FAILURE; }

PRStatus RCFileIO::GetLocalName(RCNetAddr*) const
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return PR_FAILURE; }

PRStatus RCFileIO::GetPeerName(RCNetAddr*) const
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return PR_FAILURE; }

PRStatus RCFileIO::GetSocketOption(PRSocketOptionData*) const
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return PR_FAILURE; }

PRStatus RCFileIO::Listen(PRIntn)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return PR_FAILURE; }

PRInt16 RCFileIO::Poll(PRInt16, PRInt16*)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return 0; }

PRInt32 RCFileIO::Recv(void*, PRSize, PRIntn, const RCInterval&)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return -1; }

PRInt32 RCFileIO::Recvfrom(void*, PRSize, PRIntn, RCNetAddr*, const RCInterval&)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return -1; }

PRInt32 RCFileIO::Send(
    const void*, PRSize, PRIntn, const RCInterval&)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return -1; }

PRInt32 RCFileIO::Sendto(
    const void*, PRSize, PRIntn, const RCNetAddr&, const RCInterval&)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return -1; }

RCIO* RCFileIO::Accept(RCNetAddr*, const RCInterval&)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return NULL; }

PRStatus RCFileIO::Bind(const RCNetAddr&)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return PR_FAILURE; }

PRInt32 RCFileIO::AcceptRead(
    RCIO**, RCNetAddr**, void*, PRSize, const RCInterval&)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return -1; }

PRStatus RCFileIO::SetSocketOption(const PRSocketOptionData*)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return PR_FAILURE; }

PRStatus RCFileIO::Shutdown(RCIO::ShutdownHow)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return PR_FAILURE; }

PRInt32 RCFileIO::TransmitFile(
    RCIO*, const void*, PRSize, RCIO::FileDisposition, const RCInterval&)
{ PR_SetError(PR_INVALID_METHOD_ERROR, 0); return -1; }

/*
** Class implementation for file information object (ref: prio.h)
*/

RCFileInfo::~RCFileInfo() { }

RCFileInfo::RCFileInfo(const RCFileInfo& her): RCBase()
    { info = her.info; }  /* RCFileInfo::RCFileInfo */

RCTime RCFileInfo::CreationTime() const { return RCTime(info.creationTime); }

RCTime RCFileInfo::ModifyTime() const { return RCTime(info.modifyTime); }

RCFileInfo::FileType RCFileInfo::Type() const
{
    RCFileInfo::FileType type;
    switch (info.type)
    {
        case PR_FILE_FILE: type = RCFileInfo::file; break;
        case PR_FILE_DIRECTORY: type = RCFileInfo::directory; break;
        default: type = RCFileInfo::other;
    }
    return type;
}  /* RCFileInfo::Type */