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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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 "nsIOutputStream.idl"
%{C++
namespace mozilla {
template<class ElementType, size_t Extent> class Span;
}
%}
native Bytes(mozilla::Span<const uint8_t>);
/**
* This interface allows writing of primitive data types (integers,
* floating-point values, booleans, etc.) to a stream in a binary, untagged,
* fixed-endianness format. This might be used, for example, to implement
* network protocols or to produce architecture-neutral binary disk files,
* i.e. ones that can be read and written by both big-endian and little-endian
* platforms. Output is written in big-endian order (high-order byte first),
* as this is traditional network order.
*
* @See nsIBinaryInputStream
*/
[scriptable, builtinclass, uuid(204ee610-8765-11d3-90cf-0040056a906e)]
interface nsIBinaryOutputStream : nsIOutputStream {
void setOutputStream(in nsIOutputStream aOutputStream);
/**
* Write a boolean as an 8-bit char to the stream.
*/
void writeBoolean(in boolean aBoolean);
void write8(in uint8_t aByte);
void write16(in uint16_t a16);
void write32(in uint32_t a32);
void write64(in uint64_t a64);
void writeFloat(in float aFloat);
void writeDouble(in double aDouble);
/**
* Write an 8-bit pascal style string to the stream.
* 32-bit length field, followed by length 8-bit chars.
*/
void writeStringZ(in string aString);
/**
* Write a 16-bit pascal style string to the stream.
* 32-bit length field, followed by length PRUnichars.
*/
void writeWStringZ(in wstring aString);
/**
* Write an 8-bit pascal style string (UTF8-encoded) to the stream.
* 32-bit length field, followed by length 8-bit chars.
*/
void writeUtf8Z(in wstring aString);
/**
* Write an opaque byte array to the stream.
*/
[binaryname(WriteBytesFromJS)]
void writeBytes([size_is(aLength)] in string aString,
[optional] in uint32_t aLength);
/**
* Non-scriptable and saner-signature version of the same.
*/
[noscript, nostdcall, binaryname(WriteBytes)]
void writeBytesNative(in Bytes aBytes);
/**
* Write an opaque byte array to the stream.
*/
void writeByteArray(in Array<uint8_t> aBytes);
%{C++
/**
* C++ helper to write a `const nsACString&` as an 8-bit pascal style string
* to the stream.
* 32-bit length field, followed by length 8-bit chars.
*/
nsresult WriteCString(const nsACString& aString) {
nsresult rv = Write32(aString.Length());
if (NS_SUCCEEDED(rv)) rv = WriteBytes(aString);
return rv;
}
%}
};
%{C++
inline nsresult
NS_WriteOptionalStringZ(nsIBinaryOutputStream* aStream, const char* aString)
{
bool nonnull = (aString != nullptr);
nsresult rv = aStream->WriteBoolean(nonnull);
if (NS_SUCCEEDED(rv) && nonnull)
rv = aStream->WriteStringZ(aString);
return rv;
}
inline nsresult
NS_WriteOptionalWStringZ(nsIBinaryOutputStream* aStream, const char16_t* aString)
{
bool nonnull = (aString != nullptr);
nsresult rv = aStream->WriteBoolean(nonnull);
if (NS_SUCCEEDED(rv) && nonnull)
rv = aStream->WriteWStringZ(aString);
return rv;
}
%}
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