Issue #1258 - Part 1: Import mailnews, ldap, and mork from comm-esr52.9.1

mailnews/base/util/nsMsgFileStream.cpp

@@ -0,0 +1,196 @@
+/* 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
+}
+
+
+