156 lines
4.1 KiB
C++
156 lines
4.1 KiB
C++
// SPDX-License-Identifier: MIT
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// Copyright 2011, SIL International, All rights reserved.
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// JSON pretty printer for graphite font debug output logging.
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// Created on: 15 Dec 2011
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// Author: Tim Eves
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#pragma once
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#include "inc/Main.h"
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#include <cassert>
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#include <cstdio>
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#include <cstdint>
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#include "inc/vector.hpp"
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namespace graphite2 {
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class json
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{
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// Prevent copying
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json(const json &);
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json & operator = (const json &);
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typedef void (*_context_t)(json &);
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FILE * const _stream;
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char _contexts[128], // context stack
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* _context, // current context (top of stack)
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* _flatten; // if !0 points to context above which
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// pretty printed output should occur.
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vector<void *> _env;
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void context(const char current) throw();
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void indent(const int d=0) throw();
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void push_context(const char, const char) throw();
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void pop_context() throw();
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public:
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class closer;
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using string = const char *;
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using number = double;
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enum class integer : std::intmax_t {};
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enum class integer_u : std::uintmax_t {};
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using boolean = bool;
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static const std::nullptr_t null;
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void setenv(unsigned int index, void *val) { _env.reserve(index + 1); if (index >= _env.size()) _env.insert(_env.end(), _env.size() - index + 1, 0); _env[index] = val; }
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void *getenv(unsigned int index) const { return _env[index]; }
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const vector<void *> &getenvs() const { return _env; }
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static void flat(json &) throw();
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static void close(json &) throw();
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static void object(json &) throw();
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static void array(json &) throw();
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static void item(json &) throw();
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json(FILE * stream) throw();
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~json() throw ();
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FILE * stream() const throw();
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json & operator << (string) throw();
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json & operator << (number) throw();
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json & operator << (integer) throw();
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json & operator << (integer_u) throw();
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json & operator << (boolean) throw();
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json & operator << (std::nullptr_t) throw();
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json & operator << (_context_t) throw();
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operator bool() const throw();
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bool good() const throw();
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bool eof() const throw();
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CLASS_NEW_DELETE;
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};
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class json::closer
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{
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// Prevent copying.
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closer(const closer &);
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closer & operator = (const closer &);
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json * const _j;
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public:
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closer(json * const j) : _j(j) {}
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~closer() throw() { if (_j) *_j << close; }
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};
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inline
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json::json(FILE * s) throw()
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: _stream(s), _context(_contexts), _flatten(0)
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{
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if (good())
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fflush(s);
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}
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inline
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json::~json() throw ()
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{
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while (_context > _contexts) pop_context();
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}
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inline
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FILE * json::stream() const throw() { return _stream; }
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inline
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json & json::operator << (json::_context_t ctxt) throw()
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{
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ctxt(*this);
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return *this;
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}
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inline
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json & operator << (json & j, signed char d) throw() { return j << json::integer(d); }
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inline
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json & operator << (json & j, unsigned char d) throw() { return j << json::integer_u(d); }
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inline
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json & operator << (json & j, short int d) throw() { return j << json::integer(d); }
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inline
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json & operator << (json & j, unsigned short int d) throw() { return j << json::integer_u(d); }
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inline
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json & operator << (json & j, int d) throw() { return j << json::integer(d); }
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inline
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json & operator << (json & j, unsigned int d) throw() { return j << json::integer_u(d); }
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inline
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json & operator << (json & j, long int d) throw() { return j << json::integer(d); }
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inline
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json & operator << (json & j, unsigned long int d) throw() { return j << json::integer_u(d); }
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inline
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json & operator << (json & j, long long int d) throw() { return j << json::integer(d); }
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inline
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json & operator << (json & j, unsigned long long int d) throw() { return j << json::integer_u(d); }
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inline
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json::operator bool() const throw() { return good(); }
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inline
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bool json::good() const throw() { return _stream && ferror(_stream) == 0; }
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inline
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bool json::eof() const throw() { return feof(_stream) != 0; }
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} // namespace graphite2
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