gecko-dev/xpcom/io/nsStringStream.h

75 lines
2.8 KiB
C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef nsStringStream_h__
#define nsStringStream_h__
#include "nsIStringStream.h"
#include "nsStringGlue.h"
#include "nsMemory.h"
/**
* Implements:
* nsIStringInputStream
* nsIInputStream
* nsISeekableStream
* nsISupportsCString
*/
#define NS_STRINGINPUTSTREAM_CONTRACTID "@mozilla.org/io/string-input-stream;1"
#define NS_STRINGINPUTSTREAM_CID \
{ /* 0abb0835-5000-4790-af28-61b3ba17c295 */ \
0x0abb0835, \
0x5000, \
0x4790, \
{0xaf, 0x28, 0x61, 0xb3, 0xba, 0x17, 0xc2, 0x95} \
}
/**
* Factory method to get an nsInputStream from a byte buffer. Result will
* implement nsIStringInputStream and nsISeekableStream.
*
* If aAssignment is NS_ASSIGNMENT_COPY, then the resulting stream holds a copy
* of the given buffer (aStringToRead), and the caller is free to discard
* aStringToRead after this function returns.
*
* If aAssignment is NS_ASSIGNMENT_DEPEND, then the resulting stream refers
* directly to the given buffer (aStringToRead), so the caller must ensure that
* the buffer remains valid for the lifetime of the stream object. Use with
* care!!
*
* If aAssignment is NS_ASSIGNMENT_ADOPT, then the resulting stream refers
* directly to the given buffer (aStringToRead) and will free aStringToRead
* once the stream is closed.
*
* If aLength is less than zero, then the length of aStringToRead will be
* determined by scanning the buffer for the first null byte.
*/
extern nsresult
NS_NewByteInputStream(nsIInputStream** aStreamResult,
const char* aStringToRead, int32_t aLength = -1,
nsAssignmentType aAssignment = NS_ASSIGNMENT_DEPEND);
/**
* Factory method to get an nsInputStream from an nsAString. Result will
* implement nsIStringInputStream and nsISeekableStream.
*
* The given string data will be converted to a single-byte data buffer via
* truncation (i.e., the high-order byte of each character will be discarded).
* This could result in data-loss, so be careful when using this function.
*/
extern nsresult
NS_NewStringInputStream(nsIInputStream** aStreamResult,
const nsAString& aStringToRead);
/**
* Factory method to get an nsInputStream from an nsACString. Result will
* implement nsIStringInputStream and nsISeekableStream.
*/
extern nsresult
NS_NewCStringInputStream(nsIInputStream** aStreamResult,
const nsACString& aStringToRead);
#endif // nsStringStream_h__