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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsIFile.h"
#include "nsMsgFileStream.h"
#include "prerr.h"
#include "prerror.h"
/* From nsDebugImpl.cpp: */
static nsresult
ErrorAccordingToNSPR()
{
PRErrorCode err = PR_GetError();
switch (err) {
case PR_OUT_OF_MEMORY_ERROR: return NS_ERROR_OUT_OF_MEMORY;
case PR_WOULD_BLOCK_ERROR: return NS_BASE_STREAM_WOULD_BLOCK;
case PR_FILE_NOT_FOUND_ERROR: return NS_ERROR_FILE_NOT_FOUND;
case PR_READ_ONLY_FILESYSTEM_ERROR: return NS_ERROR_FILE_READ_ONLY;
case PR_NOT_DIRECTORY_ERROR: return NS_ERROR_FILE_NOT_DIRECTORY;
case PR_IS_DIRECTORY_ERROR: return NS_ERROR_FILE_IS_DIRECTORY;
case PR_LOOP_ERROR: return NS_ERROR_FILE_UNRESOLVABLE_SYMLINK;
case PR_FILE_EXISTS_ERROR: return NS_ERROR_FILE_ALREADY_EXISTS;
case PR_FILE_IS_LOCKED_ERROR: return NS_ERROR_FILE_IS_LOCKED;
case PR_FILE_TOO_BIG_ERROR: return NS_ERROR_FILE_TOO_BIG;
case PR_NO_DEVICE_SPACE_ERROR: return NS_ERROR_FILE_NO_DEVICE_SPACE;
case PR_NAME_TOO_LONG_ERROR: return NS_ERROR_FILE_NAME_TOO_LONG;
case PR_DIRECTORY_NOT_EMPTY_ERROR: return NS_ERROR_FILE_DIR_NOT_EMPTY;
case PR_NO_ACCESS_RIGHTS_ERROR: return NS_ERROR_FILE_ACCESS_DENIED;
default: return NS_ERROR_FAILURE;
}
}
nsMsgFileStream::nsMsgFileStream()
{
mFileDesc = nullptr;
mSeekedToEnd = false;
}
nsMsgFileStream::~nsMsgFileStream()
{
if (mFileDesc)
PR_Close(mFileDesc);
}
NS_IMPL_ISUPPORTS(nsMsgFileStream, nsIInputStream, nsIOutputStream, nsISeekableStream)
nsresult nsMsgFileStream::InitWithFile(nsIFile *file)
{
return file->OpenNSPRFileDesc(PR_RDWR|PR_CREATE_FILE, 0664, &mFileDesc);
}
NS_IMETHODIMP
nsMsgFileStream::Seek(int32_t whence, int64_t offset)
{
if (mFileDesc == nullptr)
return NS_BASE_STREAM_CLOSED;
bool seekingToEnd = whence == PR_SEEK_END && offset == 0;
if (seekingToEnd && mSeekedToEnd)
return NS_OK;
int64_t cnt = PR_Seek64(mFileDesc, offset, (PRSeekWhence)whence);
if (cnt == int64_t(-1)) {
return ErrorAccordingToNSPR();
}
mSeekedToEnd = seekingToEnd;
return NS_OK;
}
NS_IMETHODIMP
nsMsgFileStream::Tell(int64_t *result)
{
if (mFileDesc == nullptr)
return NS_BASE_STREAM_CLOSED;
int64_t cnt = PR_Seek64(mFileDesc, 0, PR_SEEK_CUR);
if (cnt == int64_t(-1)) {
return ErrorAccordingToNSPR();
}
*result = cnt;
return NS_OK;
}
NS_IMETHODIMP
nsMsgFileStream::SetEOF()
{
if (mFileDesc == nullptr)
return NS_BASE_STREAM_CLOSED;
return NS_ERROR_NOT_IMPLEMENTED;
}
/* void close (); */
NS_IMETHODIMP nsMsgFileStream::Close()
{
nsresult rv = NS_OK;
if (mFileDesc && (PR_Close(mFileDesc) == PR_FAILURE))
rv = NS_BASE_STREAM_OSERROR;
mFileDesc = nullptr;
return rv;
}
/* unsigned long long available (); */
NS_IMETHODIMP nsMsgFileStream::Available(uint64_t *aResult)
{
if (!mFileDesc)
return NS_BASE_STREAM_CLOSED;
int64_t avail = PR_Available64(mFileDesc);
if (avail == -1)
return ErrorAccordingToNSPR();
*aResult = avail;
return NS_OK;
}
/* [noscript] unsigned long read (in charPtr aBuf, in unsigned long aCount); */
NS_IMETHODIMP nsMsgFileStream::Read(char * aBuf, uint32_t aCount, uint32_t *aResult)
{
if (!mFileDesc)
{
*aResult = 0;
return NS_OK;
}
int32_t bytesRead = PR_Read(mFileDesc, aBuf, aCount);
if (bytesRead == -1)
return ErrorAccordingToNSPR();
*aResult = bytesRead;
return NS_OK;
}
/* [noscript] unsigned long readSegments (in nsWriteSegmentFun aWriter, in voidPtr aClosure, in unsigned long aCount); */
NS_IMETHODIMP nsMsgFileStream::ReadSegments(nsWriteSegmentFun aWriter, void * aClosure, uint32_t aCount, uint32_t *_retval)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
/* boolean isNonBlocking (); */
NS_IMETHODIMP nsMsgFileStream::IsNonBlocking(bool *aNonBlocking)
{
*aNonBlocking = false;
return NS_OK;
}
NS_IMETHODIMP
nsMsgFileStream::Write(const char *buf, uint32_t count, uint32_t *result)
{
if (mFileDesc == nullptr)
return NS_BASE_STREAM_CLOSED;
int32_t cnt = PR_Write(mFileDesc, buf, count);
if (cnt == -1) {
return ErrorAccordingToNSPR();
}
*result = cnt;
return NS_OK;
}
NS_IMETHODIMP
nsMsgFileStream::Flush(void)
{
if (mFileDesc == nullptr)
return NS_BASE_STREAM_CLOSED;
int32_t cnt = PR_Sync(mFileDesc);
if (cnt == -1)
return ErrorAccordingToNSPR();
return NS_OK;
}
NS_IMETHODIMP
nsMsgFileStream::WriteFrom(nsIInputStream *inStr, uint32_t count, uint32_t *_retval)
{
NS_NOTREACHED("WriteFrom (see source comment)");
return NS_ERROR_NOT_IMPLEMENTED;
// File streams intentionally do not support this method.
// If you need something like this, then you should wrap
// the file stream using nsIBufferedOutputStream
}
NS_IMETHODIMP
nsMsgFileStream::WriteSegments(nsReadSegmentFun reader, void * closure, uint32_t count, uint32_t *_retval)
{
NS_NOTREACHED("WriteSegments (see source comment)");
return NS_ERROR_NOT_IMPLEMENTED;
// File streams intentionally do not support this method.
// If you need something like this, then you should wrap
// the file stream using nsIBufferedOutputStream
}
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