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/*
This file is part of Android File Transfer For Linux.
Copyright (C) 2015-2020 Vladimir Menshakov
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef AFTL_MTP_PTP_OUTPUTSTREAM_H
#define AFTL_MTP_PTP_OUTPUTSTREAM_H
#include <mtp/types.h>
#include <mtp/ByteArray.h>
namespace mtp
{
class OutputStream //! MTP format encoding output stream
{
ByteArray & _data;
public:
OutputStream(ByteArray &data): _data(data)
{ _data.reserve(512); }
ByteArray & GetData()
{ return _data; }
const ByteArray & GetData() const
{ return _data; }
void Write8(u8 value)
{ _data.push_back(value); }
void Write16(u16 value)
{ Write8(value); Write8(value >> 8); }
void Write32(u32 value)
{ Write16(value); Write16(value >> 16); }
void Write64(u32 value)
{ Write32(value); Write32(value >> 16); }
static size_t Utf8Length(const std::string &value)
{
size_t size = 0;
for(char c: value)
{
if ((c & 0x80) == 0 || (c & 0xc0) != 0x80)
++size;
}
return size;
}
void WriteData(const ByteArray & data)
{
_data.reserve(data.size() + _data.size());
for(auto b : data)
Write8(b);
}
void WriteString(const std::string &value)
{
if (value.empty())
{
Write8(0);
return;
}
size_t len = 1 + Utf8Length(value);
if (len > 255)
throw std::runtime_error("string is too big (only 255 chars allowed, including null terminator)");
Write8(len);
for(size_t i = 0, p = 0; i < len && p < value.size(); ++i)
{
u8 c0 = value[p++];
u16 uni;
if (c0 == 0xc0 || c0 == 0xc1 || c0 >= 0xf5)
{
uni = '?';
}
else if (c0 < 0x80)
{
uni = c0;
}
else
{
u8 c1 = value[p++];
if (c0 >= 0xc2 && c0 <= 0xdf)
uni = ((c0 & 0x1f) << 6) | (c1 & 0x3f);
else
{
u8 c2 = value[p++];
if (c0 >= 0xe0 && c0 <= 0xef)
uni = ((c0 & 0x0f) << 12) | ((c1 & 0x3f) << 6) | (c2 & 0x3f);
else
uni = '?';
}
}
Write16(uni);
}
Write16(0);
}
template<typename ArrayType>
void WriteArray(const ArrayType & array)
{
Write32(array.size());
for(const auto & el : array)
(*this) << el;
}
};
inline OutputStream & operator << (OutputStream &stream, char value)
{ stream.Write8(value); return stream; }
inline OutputStream & operator << (OutputStream &stream, u8 value)
{ stream.Write8(value); return stream; }
inline OutputStream & operator << (OutputStream &stream, u16 value)
{ stream.Write16(value); return stream; }
inline OutputStream & operator << (OutputStream &stream, u32 value)
{ stream.Write32(value); return stream; }
inline OutputStream & operator << (OutputStream &stream, u64 value)
{ stream.Write64(value); return stream; }
inline OutputStream & operator << (OutputStream &stream, const std::string &value)
{ stream.WriteString(value); return stream; }
template<typename ElementType>
inline OutputStream & operator << (OutputStream &stream, const std::vector<ElementType> &value)
{ stream.template WriteArray<ElementType>(value); return stream; }
}
#endif
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