mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 22:55:23 +00:00
570 lines
16 KiB
C++
570 lines
16 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.0 (the "NPL"); you may not use this file except in
|
|
* compliance with the NPL. You may obtain a copy of the NPL at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
|
* for the specific language governing rights and limitations under the
|
|
* NPL.
|
|
*
|
|
* The Initial Developer of this code under the NPL is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
|
* Reserved.
|
|
*/
|
|
|
|
#include "nsIBuffer.h"
|
|
#include "nsIBufferInputStream.h"
|
|
#include "nsIBufferOutputStream.h"
|
|
#include "nsAutoLock.h"
|
|
|
|
class nsBufferInputStream;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
class nsBufferInputStream : public nsIBufferInputStream
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
|
|
// nsIBaseStream methods:
|
|
NS_IMETHOD Close(void);
|
|
|
|
// nsIInputStream methods:
|
|
NS_IMETHOD GetLength(PRUint32 *aLength);
|
|
NS_IMETHOD Read(char* aBuf, PRUint32 aCount, PRUint32 *aReadCount);
|
|
|
|
// nsIBufferInputStream methods:
|
|
NS_IMETHOD GetBuffer(nsIBuffer* *result);
|
|
NS_IMETHOD Search(const char *forString, PRBool ignoreCase, PRBool *found, PRUint32 *offsetSearchedTo);
|
|
NS_IMETHOD Fill(const char *buf, PRUint32 count, PRUint32 *_retval);
|
|
NS_IMETHOD FillFrom(nsIInputStream *inStr, PRUint32 count, PRUint32 *_retval);
|
|
|
|
// nsBufferInputStream methods:
|
|
nsBufferInputStream(nsIBuffer* buf, PRBool blocking);
|
|
virtual ~nsBufferInputStream();
|
|
|
|
nsresult Fill();
|
|
|
|
protected:
|
|
nsIBuffer* mBuffer;
|
|
PRBool mBlocking;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
class nsBufferOutputStream : public nsIBufferOutputStream
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
|
|
// nsIBaseStream methods:
|
|
NS_IMETHOD Close(void);
|
|
|
|
// nsIOutputStream methods:
|
|
NS_IMETHOD Write(const char* aBuf, PRUint32 aCount, PRUint32 *aWriteCount);
|
|
NS_IMETHOD Flush(void);
|
|
|
|
// nsIBufferOutputStream methods:
|
|
NS_IMETHOD GetBuffer(nsIBuffer * *aBuffer);
|
|
NS_IMETHOD WriteFrom(nsIInputStream* fromStream, PRUint32 aCount,
|
|
PRUint32 *aWriteCount);
|
|
|
|
// nsBufferOutputStream methods:
|
|
nsBufferOutputStream(nsIBuffer* buf, PRBool blocking);
|
|
virtual ~nsBufferOutputStream();
|
|
|
|
protected:
|
|
nsIBuffer* mBuffer;
|
|
PRBool mBlocking;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// nsBufferInputStream methods:
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
nsBufferInputStream::nsBufferInputStream(nsIBuffer* buf, PRBool blocking)
|
|
: mBuffer(buf), mBlocking(blocking)
|
|
{
|
|
NS_INIT_REFCNT();
|
|
NS_ADDREF(mBuffer);
|
|
}
|
|
|
|
nsBufferInputStream::~nsBufferInputStream()
|
|
{
|
|
(void)Close();
|
|
NS_RELEASE(mBuffer);
|
|
}
|
|
|
|
NS_IMPL_ADDREF(nsBufferInputStream);
|
|
NS_IMPL_RELEASE(nsBufferInputStream);
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferInputStream::QueryInterface(REFNSIID aIID, void** aInstancePtr)
|
|
{
|
|
if (aInstancePtr == nsnull)
|
|
return NS_ERROR_NULL_POINTER;
|
|
if (aIID.Equals(nsIBufferInputStream::GetIID()) ||
|
|
aIID.Equals(nsIInputStream::GetIID()) ||
|
|
aIID.Equals(nsIBaseStream::GetIID()) ||
|
|
aIID.Equals(nsISupports::GetIID())) {
|
|
*aInstancePtr = this;
|
|
NS_ADDREF_THIS();
|
|
return NS_OK;
|
|
}
|
|
return NS_NOINTERFACE;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferInputStream::Close(void)
|
|
{
|
|
nsresult rv;
|
|
nsAutoCMonitor mon(mBuffer);
|
|
|
|
#ifdef DEBUG
|
|
PRBool closed;
|
|
rv = mBuffer->GetReaderClosed(&closed);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv) && !closed, "state change error");
|
|
#endif
|
|
|
|
rv = mBuffer->ReaderClosed();
|
|
// even if ReaderClosed fails, be sure to do the notify:
|
|
if (mBlocking) {
|
|
nsAutoCMonitor mon(mBuffer);
|
|
nsresult rv2 = mon.Notify(); // wake up the writer
|
|
if (NS_FAILED(rv2))
|
|
return rv2;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferInputStream::GetLength(PRUint32 *aLength)
|
|
{
|
|
nsAutoCMonitor mon(mBuffer);
|
|
#ifdef DEBUG
|
|
nsresult rv;
|
|
PRBool closed;
|
|
rv = mBuffer->GetReaderClosed(&closed);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv) && !closed, "state change error");
|
|
#endif
|
|
|
|
return mBuffer->GetReadableAmount(aLength);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferInputStream::Read(char* aBuf, PRUint32 aCount, PRUint32 *aReadCount)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
nsAutoCMonitor mon(mBuffer);
|
|
|
|
#ifdef DEBUG
|
|
PRBool closed;
|
|
rv = mBuffer->GetReaderClosed(&closed);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv) && !closed, "state change error");
|
|
#endif
|
|
|
|
*aReadCount = 0;
|
|
while (aCount > 0) {
|
|
PRUint32 amt;
|
|
rv = mBuffer->Read(aBuf, aCount, &amt);
|
|
if (rv == NS_BASE_STREAM_EOF) {
|
|
rv = (*aReadCount == 0) ? rv : NS_OK;
|
|
break;
|
|
}
|
|
// if (rv == NS_BASE_STREAM_WOULD_BLOCK) break;
|
|
if (NS_FAILED(rv)) break;
|
|
|
|
if (amt == 0) {
|
|
rv = Fill();
|
|
if (rv == NS_BASE_STREAM_WOULD_BLOCK) break;
|
|
if (NS_FAILED(rv)) break;
|
|
}
|
|
else {
|
|
*aReadCount += amt;
|
|
aBuf += amt;
|
|
aCount -= amt;
|
|
}
|
|
}
|
|
if (rv == NS_BASE_STREAM_EOF) {
|
|
// all we're ever going to get -- so wake up anyone in Flush
|
|
#ifdef DEBUG
|
|
PRUint32 amt;
|
|
const char* buf;
|
|
nsresult rv2 = mBuffer->GetReadSegment(0, &buf, &amt);
|
|
NS_ASSERTION(rv2 == NS_BASE_STREAM_EOF ||
|
|
(NS_SUCCEEDED(rv2) && amt == 0), "Read failed");
|
|
#endif
|
|
nsAutoCMonitor mon(mBuffer);
|
|
mon.Notify(); // wake up writer
|
|
}
|
|
return (*aReadCount == 0) ? rv : NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferInputStream::GetBuffer(nsIBuffer* *result)
|
|
{
|
|
nsAutoCMonitor mon(mBuffer);
|
|
*result = mBuffer;
|
|
NS_ADDREF(mBuffer);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferInputStream::Search(const char *forString, PRBool ignoreCase, PRBool *found, PRUint32 *offsetSearchedTo)
|
|
{
|
|
nsAutoCMonitor mon(mBuffer);
|
|
#ifdef DEBUG
|
|
nsresult rv;
|
|
PRBool closed;
|
|
rv = mBuffer->GetReaderClosed(&closed);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv) && !closed, "state change error");
|
|
#endif
|
|
|
|
return mBuffer->Search(forString, ignoreCase, found, offsetSearchedTo);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferInputStream::Fill(const char* aBuf, PRUint32 aCount, PRUint32 *aWriteCount)
|
|
{
|
|
nsAutoCMonitor mon(mBuffer);
|
|
nsresult rv = NS_OK;
|
|
|
|
#ifdef DEBUG
|
|
PRBool closed;
|
|
rv = mBuffer->GetReaderClosed(&closed);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv) && !closed, "state change error");
|
|
#endif
|
|
|
|
*aWriteCount = 0;
|
|
while (aCount > 0) {
|
|
PRUint32 amt;
|
|
rv = mBuffer->Write(aBuf, aCount, &amt);
|
|
if (rv == NS_BASE_STREAM_EOF)
|
|
return *aWriteCount > 0 ? NS_OK : rv;
|
|
if (NS_FAILED(rv)) return rv;
|
|
if (amt == 0) {
|
|
rv = Fill();
|
|
if (rv == NS_BASE_STREAM_WOULD_BLOCK)
|
|
return *aWriteCount > 0 ? NS_OK : rv;
|
|
if (NS_FAILED(rv)) return rv;
|
|
}
|
|
else {
|
|
aBuf += amt;
|
|
aCount -= amt;
|
|
*aWriteCount += amt;
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferInputStream::FillFrom(nsIInputStream *fromStream, PRUint32 aCount, PRUint32 *aWriteCount)
|
|
{
|
|
nsAutoCMonitor mon(mBuffer);
|
|
nsresult rv = NS_OK;
|
|
|
|
#ifdef DEBUG
|
|
PRBool closed;
|
|
rv = mBuffer->GetReaderClosed(&closed);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv) && !closed, "state change error");
|
|
#endif
|
|
|
|
*aWriteCount = 0;
|
|
while (aCount > 0) {
|
|
PRUint32 amt;
|
|
rv = mBuffer->WriteFrom(fromStream, aCount, &amt);
|
|
if (rv == NS_BASE_STREAM_EOF)
|
|
return *aWriteCount > 0 ? NS_OK : rv;
|
|
if (NS_FAILED(rv)) return rv;
|
|
if (amt == 0) {
|
|
rv = Fill();
|
|
if (rv == NS_BASE_STREAM_WOULD_BLOCK)
|
|
return *aWriteCount > 0 ? NS_OK : rv;
|
|
if (NS_FAILED(rv)) return rv;
|
|
}
|
|
else {
|
|
aCount -= amt;
|
|
*aWriteCount += amt;
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsBufferInputStream::Fill()
|
|
{
|
|
nsAutoCMonitor mon(mBuffer);
|
|
nsresult rv;
|
|
if (mBlocking) {
|
|
nsAutoCMonitor mon(mBuffer);
|
|
while (PR_TRUE) {
|
|
// check read buffer again while in the monitor
|
|
PRUint32 amt;
|
|
const char* buf;
|
|
rv = mBuffer->GetReadSegment(0, &buf, &amt);
|
|
if (NS_FAILED(rv) || amt > 0) return rv;
|
|
|
|
// else notify the writer and wait
|
|
rv = mon.Notify();
|
|
if (NS_FAILED(rv)) return rv; // interrupted
|
|
rv = mon.Wait();
|
|
if (NS_FAILED(rv)) return rv; // interrupted
|
|
// loop again so that we end up exiting on EOF with
|
|
// the right error
|
|
}
|
|
}
|
|
else {
|
|
return NS_BASE_STREAM_WOULD_BLOCK;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
NS_COM nsresult
|
|
NS_NewBufferInputStream(nsIBufferInputStream* *result,
|
|
nsIBuffer* buffer, PRBool blocking)
|
|
{
|
|
nsBufferInputStream* str = new nsBufferInputStream(buffer, blocking);
|
|
if (str == nsnull)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
NS_ADDREF(str);
|
|
*result = str;
|
|
return NS_OK;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// nsBufferOutputStream methods:
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
nsBufferOutputStream::nsBufferOutputStream(nsIBuffer* buf, PRBool blocking)
|
|
: mBuffer(buf), mBlocking(blocking)
|
|
{
|
|
NS_INIT_REFCNT();
|
|
NS_ADDREF(mBuffer);
|
|
}
|
|
|
|
nsBufferOutputStream::~nsBufferOutputStream()
|
|
{
|
|
(void)Close();
|
|
NS_RELEASE(mBuffer);
|
|
}
|
|
|
|
NS_IMPL_ADDREF(nsBufferOutputStream);
|
|
NS_IMPL_RELEASE(nsBufferOutputStream);
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferOutputStream::QueryInterface(REFNSIID aIID, void** aInstancePtr)
|
|
{
|
|
if (aInstancePtr == nsnull)
|
|
return NS_ERROR_NULL_POINTER;
|
|
if (aIID.Equals(nsIBufferOutputStream::GetIID()) ||
|
|
aIID.Equals(nsIOutputStream::GetIID()) ||
|
|
aIID.Equals(nsIBaseStream::GetIID()) ||
|
|
aIID.Equals(nsISupports::GetIID())) {
|
|
*aInstancePtr = this;
|
|
NS_ADDREF_THIS();
|
|
return NS_OK;
|
|
}
|
|
return NS_NOINTERFACE;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferOutputStream::Close(void)
|
|
{
|
|
nsAutoCMonitor mon(mBuffer);
|
|
nsresult rv;
|
|
rv = mBuffer->SetCondition(NS_BASE_STREAM_EOF);
|
|
// even if SetCondition fails, be sure to do the notify:
|
|
if (mBlocking) {
|
|
nsAutoCMonitor mon(mBuffer);
|
|
nsresult rv2 = mon.Notify(); // wake up the writer
|
|
if (NS_FAILED(rv2))
|
|
return rv2;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferOutputStream::Write(const char* aBuf, PRUint32 aCount, PRUint32 *aWriteCount)
|
|
{
|
|
nsAutoCMonitor mon(mBuffer);
|
|
nsresult rv = NS_OK;
|
|
|
|
#ifdef DEBUG
|
|
nsresult condition;
|
|
rv = mBuffer->GetCondition(&condition);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv) && condition != NS_BASE_STREAM_EOF, "state change error");
|
|
#endif
|
|
|
|
*aWriteCount = 0;
|
|
while (aCount > 0) {
|
|
PRUint32 amt;
|
|
rv = mBuffer->Write(aBuf, aCount, &amt);
|
|
NS_ASSERTION(rv != NS_BASE_STREAM_EOF, "Write should not return EOF");
|
|
// if (rv == NS_BASE_STREAM_WOULD_BLOCK) break;
|
|
if (NS_FAILED(rv)) break;
|
|
|
|
if (amt == 0) {
|
|
rv = Flush();
|
|
if (rv == NS_BASE_STREAM_WOULD_BLOCK) break;
|
|
if (NS_FAILED(rv)) break;
|
|
}
|
|
else {
|
|
aBuf += amt;
|
|
aCount -= amt;
|
|
*aWriteCount += amt;
|
|
}
|
|
}
|
|
if (mBlocking && rv == NS_BASE_STREAM_WOULD_BLOCK) {
|
|
// all we're going to get for now -- so wake up anyone in Flush
|
|
#ifdef DEBUG
|
|
PRUint32 amt;
|
|
const char* buf;
|
|
nsresult rv2 = mBuffer->GetReadSegment(0, &buf, &amt);
|
|
NS_ASSERTION(rv2 == NS_BASE_STREAM_EOF ||
|
|
(NS_SUCCEEDED(rv2) && amt > 0), "Write failed");
|
|
#endif
|
|
nsAutoCMonitor mon(mBuffer);
|
|
mon.Notify(); // wake up reader
|
|
}
|
|
return (*aWriteCount == 0) ? rv : NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferOutputStream::WriteFrom(nsIInputStream* fromStream, PRUint32 aCount,
|
|
PRUint32 *aWriteCount)
|
|
{
|
|
nsAutoCMonitor mon(mBuffer);
|
|
nsresult rv = NS_OK;
|
|
|
|
#ifdef xDEBUG
|
|
nsresult condition;
|
|
rv = mBuffer->GetCondition(&condition);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv) && condition != NS_BASE_STREAM_EOF, "state change error");
|
|
#endif
|
|
|
|
*aWriteCount = 0;
|
|
while (aCount > 0) {
|
|
PRUint32 amt;
|
|
rv = mBuffer->WriteFrom(fromStream, aCount, &amt);
|
|
// if (rv == NS_BASE_STREAM_WOULD_BLOCK) break;
|
|
if (NS_FAILED(rv)) break;
|
|
|
|
if (amt == 0) {
|
|
rv = Flush();
|
|
if (rv == NS_BASE_STREAM_WOULD_BLOCK) break;
|
|
if (NS_FAILED(rv)) break;
|
|
}
|
|
else {
|
|
aCount -= amt;
|
|
*aWriteCount += amt;
|
|
}
|
|
}
|
|
if (mBlocking && rv == NS_BASE_STREAM_WOULD_BLOCK) {
|
|
// all we're going to get for now -- so wake up anyone in Flush
|
|
#ifdef DEBUG
|
|
PRUint32 amt;
|
|
const char* buf;
|
|
nsresult rv2 = mBuffer->GetReadSegment(0, &buf, &amt);
|
|
NS_ASSERTION(rv2 == NS_BASE_STREAM_EOF ||
|
|
(NS_SUCCEEDED(rv2) && amt > 0), "WriteFrom failed");
|
|
#endif
|
|
nsAutoCMonitor mon(mBuffer);
|
|
mon.Notify(); // wake up reader
|
|
}
|
|
return (*aWriteCount == 0) ? rv : NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferOutputStream::Flush(void)
|
|
{
|
|
nsAutoCMonitor mon(mBuffer);
|
|
nsresult rv = NS_OK;
|
|
if (mBlocking) {
|
|
nsresult rv;
|
|
nsAutoCMonitor mon(mBuffer);
|
|
while (PR_TRUE) {
|
|
// check write buffer again while in the monitor
|
|
PRUint32 amt;
|
|
const char* buf;
|
|
rv = mBuffer->GetReadSegment(0, &buf, &amt);
|
|
if (NS_FAILED(rv) || amt == 0) return rv;
|
|
|
|
// else notify the reader and wait
|
|
rv = mon.Notify();
|
|
if (NS_FAILED(rv)) return rv; // interrupted
|
|
rv = mon.Wait();
|
|
if (NS_FAILED(rv)) return rv; // interrupted
|
|
}
|
|
}
|
|
else {
|
|
return NS_BASE_STREAM_WOULD_BLOCK;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBufferOutputStream::GetBuffer(nsIBuffer * *aBuffer)
|
|
{
|
|
nsAutoCMonitor mon(mBuffer);
|
|
*aBuffer = mBuffer;
|
|
NS_ADDREF(mBuffer);
|
|
return NS_OK;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
NS_COM nsresult
|
|
NS_NewBufferOutputStream(nsIBufferOutputStream* *result,
|
|
nsIBuffer* buffer, PRBool blocking)
|
|
{
|
|
nsBufferOutputStream* ostr = new nsBufferOutputStream(buffer, blocking);
|
|
if (ostr == nsnull)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
NS_ADDREF(ostr);
|
|
*result = ostr;
|
|
return NS_OK;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
NS_COM nsresult
|
|
NS_NewPipe(nsIBufferInputStream* *inStrResult,
|
|
nsIBufferOutputStream* *outStrResult,
|
|
PRUint32 growBySize, PRUint32 maxSize,
|
|
PRBool blocking, nsIBufferObserver* observer)
|
|
{
|
|
nsresult rv;
|
|
nsIBufferInputStream* inStr = nsnull;
|
|
nsIBufferOutputStream* outStr = nsnull;
|
|
nsIBuffer* buf = nsnull;
|
|
|
|
rv = NS_NewPageBuffer(&buf, growBySize, maxSize, observer);
|
|
if (NS_FAILED(rv)) goto error;
|
|
|
|
rv = NS_NewBufferInputStream(&inStr, buf, blocking);
|
|
if (NS_FAILED(rv)) goto error;
|
|
|
|
rv = NS_NewBufferOutputStream(&outStr, buf, blocking);
|
|
if (NS_FAILED(rv)) goto error;
|
|
|
|
NS_RELEASE(buf);
|
|
*inStrResult = inStr;
|
|
*outStrResult = outStr;
|
|
return NS_OK;
|
|
|
|
error:
|
|
NS_IF_RELEASE(inStr);
|
|
NS_IF_RELEASE(outStr);
|
|
NS_IF_RELEASE(buf);
|
|
return rv;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|