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tdlib-fork/tdutils/td/utils/tl_parsers.cpp

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "td/utils/tl_parsers.h"
#include "td/utils/misc.h"
namespace td {
alignas(4) const unsigned char TlParser::empty_data[sizeof(UInt256)] = {}; // static zero-initialized
TlParser::TlParser(Slice slice) {
data_len = left_len = slice.size();
if (is_aligned_pointer<4>(slice.begin())) {
data = slice.ubegin();
} else {
int32 *buf;
if (data_len <= small_data_array.size() * sizeof(int32)) {
buf = &small_data_array[0];
} else {
LOG(ERROR) << "Unexpected big unaligned data pointer of length " << slice.size() << " at " << slice.begin();
data_buf = std::make_unique<int32[]>(1 + data_len / sizeof(int32));
buf = data_buf.get();
}
std::memcpy(buf, slice.begin(), slice.size());
data = reinterpret_cast<unsigned char *>(buf);
}
}
void TlParser::set_error(const string &error_message) {
if (error.empty()) {
CHECK(!error_message.empty());
error = error_message;
error_pos = data_len - left_len;
data = empty_data;
left_len = 0;
data_len = 0;
} else {
data = empty_data;
CHECK(error_pos != std::numeric_limits<size_t>::max());
LOG_CHECK(data_len == 0) << data_len << " " << left_len << " " << data << " " << &empty_data[0] << " " << error_pos
<< " " << error;
CHECK(left_len == 0);
}
}
BufferSlice TlBufferParser::as_buffer_slice(Slice slice) {
if (is_aligned_pointer<4>(slice.data())) {
return parent_->from_slice(slice);
}
return BufferSlice(slice);
}
} // namespace td