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Diffstat (limited to 'gfx/graphite2/src/inc/json.h')
| -rw-r--r-- | gfx/graphite2/src/inc/json.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/gfx/graphite2/src/inc/json.h b/gfx/graphite2/src/inc/json.h new file mode 100644 index 0000000000..554cd9a3d1 --- /dev/null +++ b/gfx/graphite2/src/inc/json.h @@ -0,0 +1,178 @@ +/* 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 |