mirror of
https://github.com/wpilibsuite/allwpilib
synced 2026-06-20 00:51:42 +00:00
Move entirety of llvm namespace to wpi namespace.
During shared library loading, a different libLLVM can be pulled in, causing llvm symbols from dependent libraries to resolve to that library instead of this one. This has been seen in the wild with the Mesa OpenGL implementation in JavaFX applications (see wpilibsuite/shuffleboard#361). This is clearly a very breaking change. For some level of backwards compatibility, a namespace alias from llvm to wpi is performed in the "llvm" headers. Unfortunately, forward declarations of llvm classes will still break, but compilers seem to generate clear error messages in those cases ("namespace alias 'llvm' not allowed here, assuming 'wpi'"). This change also moves all the wpiutil headers to a single "wpi" subdirectory from the previously split "llvm", "support", "tcpsockets", and "udpsockets". Shim headers will be added for backwards compatibility in a later commit.
This commit is contained in:
Peter Johnson
433
wpiutil/src/main/native/cpp/json_serializer.cpp
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433
wpiutil/src/main/native/cpp/json_serializer.cpp
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/*----------------------------------------------------------------------------*/
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/* Modifications Copyright (c) FIRST 2017. All Rights Reserved. */
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/* Open Source Software - may be modified and shared by FRC teams. The code */
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/* must be accompanied by the FIRST BSD license file in the root directory of */
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/* the project. */
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/*----------------------------------------------------------------------------*/
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/*
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__ _____ _____ _____
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__| | __| | | | JSON for Modern C++
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| | |__ | | | | | | version 2.1.1
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|_____|_____|_____|_|___| https://github.com/nlohmann/json
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Licensed under the MIT License <http://opensource.org/licenses/MIT>.
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Copyright (c) 2013-2017 Niels Lohmann <http://nlohmann.me>.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#define WPI_JSON_IMPLEMENTATION
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#include "wpi/json.h"
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#include "wpi/SmallString.h"
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#include "wpi/StringExtras.h"
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#include "json_serializer.h"
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using namespace wpi;
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void json::serializer::dump(const json& val,
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const bool pretty_print,
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const unsigned int indent_step,
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const unsigned int current_indent)
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{
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switch (val.m_type)
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{
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case value_t::object:
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{
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if (val.m_value.object->empty())
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{
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o << "{}";
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return;
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}
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if (pretty_print)
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{
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o << "{\n";
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// variable to hold indentation for recursive calls
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const auto new_indent = current_indent + indent_step;
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// first n-1 elements
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auto i = val.m_value.object->begin();
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for (size_t cnt = 0; cnt < val.m_value.object->size() - 1; ++cnt, ++i)
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{
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o.indent(new_indent);
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o << '\"';
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dump_escaped(i->first());
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o << "\": ";
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dump(i->second, true, indent_step, new_indent);
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o << ",\n";
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}
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// last element
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assert(i != val.m_value.object->end());
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o.indent(new_indent);
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o << '\"';
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dump_escaped(i->first());
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o << "\": ";
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dump(i->second, true, indent_step, new_indent);
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o << '\n';
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o.indent(current_indent);
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o << '}';
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}
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else
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{
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o << '{';
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// first n-1 elements
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auto i = val.m_value.object->begin();
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for (size_t cnt = 0; cnt < val.m_value.object->size() - 1; ++cnt, ++i)
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{
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o << '\"';
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dump_escaped(i->first());
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o << "\":";
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dump(i->second, false, indent_step, current_indent);
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o << ',';
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}
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// last element
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assert(i != val.m_value.object->end());
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o << '\"';
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dump_escaped(i->first());
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o << "\":";
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dump(i->second, false, indent_step, current_indent);
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o << '}';
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}
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return;
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}
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case value_t::array:
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{
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if (val.m_value.array->empty())
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{
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o << "[]";
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return;
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}
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if (pretty_print)
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{
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o << "[\n";
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// variable to hold indentation for recursive calls
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const auto new_indent = current_indent + indent_step;
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// first n-1 elements
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for (auto i = val.m_value.array->cbegin(); i != val.m_value.array->cend() - 1; ++i)
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{
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o.indent(new_indent);
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dump(*i, true, indent_step, new_indent);
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o << ",\n";
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}
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// last element
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assert(!val.m_value.array->empty());
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o.indent(new_indent);
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dump(val.m_value.array->back(), true, indent_step, new_indent);
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o << '\n';
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o.indent(current_indent);
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o << ']';
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}
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else
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{
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o << '[';
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// first n-1 elements
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for (auto i = val.m_value.array->cbegin(); i != val.m_value.array->cend() - 1; ++i)
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{
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dump(*i, false, indent_step, current_indent);
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o << ',';
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}
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// last element
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assert(!val.m_value.array->empty());
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dump(val.m_value.array->back(), false, indent_step, current_indent);
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o << ']';
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}
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return;
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}
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case value_t::string:
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{
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o << '\"';
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dump_escaped(*val.m_value.string);
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o << '\"';
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return;
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}
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case value_t::boolean:
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{
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if (val.m_value.boolean)
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{
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o << "true";
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}
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else
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{
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o << "false";
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}
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return;
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}
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case value_t::number_integer:
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{
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o << static_cast<long long>(val.m_value.number_integer);
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return;
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}
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case value_t::number_unsigned:
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{
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o << static_cast<unsigned long long>(val.m_value.number_unsigned);
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return;
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}
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case value_t::number_float:
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{
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dump_float(val.m_value.number_float);
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return;
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}
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case value_t::discarded:
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{
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o << "<discarded>";
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return;
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}
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case value_t::null:
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{
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o << "null";
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return;
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}
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}
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}
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void json::serializer::dump_escaped(StringRef s) const
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{
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for (const auto& c : s)
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{
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switch (c)
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{
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// quotation mark (0x22)
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case '"':
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{
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o << '\\' << '"';
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break;
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}
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// reverse solidus (0x5c)
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case '\\':
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{
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// nothing to change
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o << '\\' << '\\';
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break;
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}
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// backspace (0x08)
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case '\b':
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{
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o << '\\' << 'b';
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break;
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}
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// formfeed (0x0c)
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case '\f':
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{
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o << '\\' << 'f';
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break;
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}
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// newline (0x0a)
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case '\n':
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{
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o << '\\' << 'n';
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break;
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}
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// carriage return (0x0d)
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case '\r':
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{
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o << '\\' << 'r';
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break;
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}
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// horizontal tab (0x09)
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case '\t':
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{
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o << '\\' << 't';
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break;
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}
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case 0x00:
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case 0x01:
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case 0x02:
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case 0x03:
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case 0x04:
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case 0x05:
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case 0x06:
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case 0x07:
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case 0x0b:
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case 0x0e:
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case 0x0f:
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case 0x10:
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case 0x11:
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case 0x12:
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case 0x13:
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case 0x14:
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case 0x15:
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case 0x16:
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case 0x17:
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case 0x18:
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case 0x19:
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case 0x1a:
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case 0x1b:
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case 0x1c:
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case 0x1d:
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case 0x1e:
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case 0x1f:
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{
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// print character c as \uxxxx
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o << "\\u00";
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o << hexdigit((c >> 4) & 0xf, true);
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o << hexdigit((c >> 0) & 0xf, true);
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break;
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}
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default:
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{
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// all other characters are added as-is
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o << c;
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break;
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}
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}
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}
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}
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void json::serializer::dump_float(double x)
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{
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// NaN / inf
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if (!std::isfinite(x) || std::isnan(x))
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{
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o << "null";
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return;
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}
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// special case for 0.0 and -0.0
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if (x == 0)
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{
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if (std::signbit(x))
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{
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o << "-0.0";
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}
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else
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{
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o << "0.0";
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}
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return;
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}
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// get number of digits for a text -> float -> text round-trip
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static constexpr auto d = std::numeric_limits<double>::digits10;
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// the actual conversion
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SmallString<64> number_buffer;
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number_buffer.resize(64);
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std::ptrdiff_t len = snprintf(number_buffer.data(), number_buffer.size(),
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"%.*g", d, x);
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// negative value indicates an error
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assert(len > 0);
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// check if buffer was large enough
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assert(static_cast<size_t>(len) < number_buffer.size());
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// erase thousands separator
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if (thousands_sep != '\0')
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{
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const auto end = std::remove(number_buffer.begin(),
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number_buffer.begin() + len,
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thousands_sep);
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std::fill(end, number_buffer.end(), '\0');
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assert((end - number_buffer.begin()) <= len);
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len = (end - number_buffer.begin());
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}
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// convert decimal point to '.'
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if (decimal_point != '\0' && decimal_point != '.')
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{
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for (auto& c : number_buffer)
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{
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if (c == decimal_point)
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{
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c = '.';
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break;
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}
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}
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}
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o.write(number_buffer.data(), static_cast<size_t>(len));
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// determine if need to append ".0"
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const bool value_is_int_like = std::none_of(number_buffer.begin(),
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number_buffer.begin() + len + 1,
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[](char c)
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{
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return c == '.' || c == 'e';
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});
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if (value_is_int_like)
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{
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o << ".0";
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}
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}
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namespace wpi {
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raw_ostream& operator<<(raw_ostream& o, const json& j)
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{
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j.dump(o, 0);
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return o;
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}
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} // namespace wpi
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std::string json::dump(int indent) const
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{
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std::string s;
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raw_string_ostream os(s);
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dump(os, indent);
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os.flush();
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return s;
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}
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void json::dump(raw_ostream& os, int indent) const
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{
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serializer s(os);
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if (indent >= 0)
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{
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s.dump(*this, true, static_cast<unsigned int>(indent));
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}
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else
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{
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s.dump(*this, false, 0);
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}
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}
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