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+/* GRAPHITE2 LICENSING
+
+ Copyright 2011, SIL International
+ All rights reserved.
+
+ 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 License, or
+ (at your option) any later version.
+
+ This program 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 also have received a copy of the GNU Lesser General Public
+ License along with this library in the file named "LICENSE".
+ If not, write to the Free Software Foundation, 51 Franklin Street,
+ Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
+ internet at http://www.fsf.org/licenses/lgpl.html.
+
+Alternatively, the contents of this file may be used under the terms of the
+Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
+License, as published by the Free Software Foundation, either version 2
+of the License or (at your option) any later version.
+*/
+// JSON pretty printer for graphite font debug output logging.
+// Created on: 15 Dec 2011
+// Author: Tim Eves
+
+#pragma once
+
+#include "inc/Main.h"
+#include <cassert>
+#include <cstdio>
+#include <cstdint>
+#include "inc/List.h"
+
+namespace graphite2 {
+
+class json
+{
+ // Prevent copying
+ json(const json &);
+ json & operator = (const json &);
+
+ typedef void (*_context_t)(json &);
+
+ FILE * const _stream;
+ char _contexts[128], // context stack
+ * _context, // current context (top of stack)
+ * _flatten; // if !0 points to context above which
+ // pretty printed output should occur.
+ Vector<void *> _env;
+
+ void context(const char current) throw();
+ void indent(const int d=0) throw();
+ void push_context(const char, const char) throw();
+ void pop_context() throw();
+
+public:
+ class closer;
+
+ using string = const char *;
+ using number = double;
+ enum class integer : std::intmax_t {};
+ enum class integer_u : std::uintmax_t {};
+ using boolean = bool;
+ static const std::nullptr_t null;
+
+ 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; }
+ void *getenv(unsigned int index) const { return _env[index]; }
+ const Vector<void *> &getenvs() const { return _env; }
+
+ static void flat(json &) throw();
+ static void close(json &) throw();
+ static void object(json &) throw();
+ static void array(json &) throw();
+ static void item(json &) throw();
+
+ json(FILE * stream) throw();
+ ~json() throw ();
+
+ FILE * stream() const throw();
+
+ json & operator << (string) throw();
+ json & operator << (number) throw();
+ json & operator << (integer) throw();
+ json & operator << (integer_u) throw();
+ json & operator << (boolean) throw();
+ json & operator << (std::nullptr_t) throw();
+ json & operator << (_context_t) throw();
+
+ operator bool() const throw();
+ bool good() const throw();
+ bool eof() const throw();
+
+ CLASS_NEW_DELETE;
+};
+
+class json::closer
+{
+ // Prevent copying.
+ closer(const closer &);
+ closer & operator = (const closer &);
+
+ json * const _j;
+public:
+ closer(json * const j) : _j(j) {}
+ ~closer() throw() { if (_j) *_j << close; }
+};
+
+inline
+json::json(FILE * s) throw()
+: _stream(s), _context(_contexts), _flatten(0)
+{
+ if (good())
+ fflush(s);
+}
+
+
+inline
+json::~json() throw ()
+{
+ while (_context > _contexts) pop_context();
+}
+
+inline
+FILE * json::stream() const throw() { return _stream; }
+
+
+inline
+json & json::operator << (json::_context_t ctxt) throw()
+{
+ ctxt(*this);
+ return *this;
+}
+
+inline
+json & operator << (json & j, signed char d) throw() { return j << json::integer(d); }
+
+inline
+json & operator << (json & j, unsigned char d) throw() { return j << json::integer_u(d); }
+
+inline
+json & operator << (json & j, short int d) throw() { return j << json::integer(d); }
+
+inline
+json & operator << (json & j, unsigned short int d) throw() { return j << json::integer_u(d); }
+
+inline
+json & operator << (json & j, int d) throw() { return j << json::integer(d); }
+
+inline
+json & operator << (json & j, unsigned int d) throw() { return j << json::integer_u(d); }
+
+inline
+json & operator << (json & j, long int d) throw() { return j << json::integer(d); }
+
+inline
+json & operator << (json & j, unsigned long int d) throw() { return j << json::integer_u(d); }
+
+inline
+json & operator << (json & j, long long int d) throw() { return j << json::integer(d); }
+
+inline
+json & operator << (json & j, unsigned long long int d) throw() { return j << json::integer_u(d); }
+
+inline
+json::operator bool() const throw() { return good(); }
+
+inline
+bool json::good() const throw() { return _stream && ferror(_stream) == 0; }
+
+inline
+bool json::eof() const throw() { return feof(_stream) != 0; }
+
+} // namespace graphite2