1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/graphite2/src/json.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,126 @@
1.4 +/* GRAPHITE2 LICENSING
1.5 +
1.6 + Copyright 2011, SIL International
1.7 + All rights reserved.
1.8 +
1.9 + This library is free software; you can redistribute it and/or modify
1.10 + it under the terms of the GNU Lesser General Public License as published
1.11 + by the Free Software Foundation; either version 2.1 of License, or
1.12 + (at your option) any later version.
1.13 +
1.14 + This program is distributed in the hope that it will be useful,
1.15 + but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1.17 + Lesser General Public License for more details.
1.18 +
1.19 + You should also have received a copy of the GNU Lesser General Public
1.20 + License along with this library in the file named "LICENSE".
1.21 + If not, write to the Free Software Foundation, 51 Franklin Street,
1.22 + Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
1.23 + internet at http://www.fsf.org/licenses/lgpl.html.
1.24 +
1.25 +Alternatively, the contents of this file may be used under the terms of the
1.26 +Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
1.27 +License, as published by the Free Software Foundation, either version 2
1.28 +of the License or (at your option) any later version.
1.29 +*/
1.30 +// JSON debug logging
1.31 +// Author: Tim Eves
1.32 +
1.33 +#if !defined GRAPHITE2_NTRACING
1.34 +
1.35 +#include <stdio.h>
1.36 +#include "inc/json.h"
1.37 +
1.38 +using namespace graphite2;
1.39 +
1.40 +namespace
1.41 +{
1.42 + enum
1.43 + {
1.44 + seq = ',',
1.45 + obj='}', member=':', empty_obj='{',
1.46 + arr=']', empty_arr='['
1.47 + };
1.48 +}
1.49 +
1.50 +const json::_null_t json::null = {};
1.51 +
1.52 +inline
1.53 +void json::context(const char current) throw()
1.54 +{
1.55 + fprintf(_stream, "%c", *_context);
1.56 + indent();
1.57 + *_context = current;
1.58 +}
1.59 +
1.60 +
1.61 +void json::indent(const int d) throw()
1.62 +{
1.63 + if (*_context == member || (_flatten && _flatten < _context))
1.64 + fputc(' ', _stream);
1.65 + else
1.66 + fprintf(_stream, "\n%*s", 4*int(_context - _contexts + d), "");
1.67 +}
1.68 +
1.69 +
1.70 +inline
1.71 +void json::push_context(const char prefix, const char suffix) throw()
1.72 +{
1.73 + assert(_context - _contexts < ptrdiff_t(sizeof _contexts));
1.74 +
1.75 + if (_context == _contexts)
1.76 + *_context = suffix;
1.77 + else
1.78 + context(suffix);
1.79 + *++_context = prefix;
1.80 +}
1.81 +
1.82 +
1.83 +void json::pop_context() throw()
1.84 +{
1.85 + assert(_context > _contexts);
1.86 +
1.87 + if (*_context == seq) indent(-1);
1.88 + else fputc(*_context, _stream);
1.89 +
1.90 + fputc(*--_context, _stream);
1.91 + if (_context == _contexts) fputc('\n', _stream);
1.92 + fflush(_stream);
1.93 +
1.94 + if (_flatten >= _context) _flatten = 0;
1.95 + *_context = seq;
1.96 +}
1.97 +
1.98 +
1.99 +// These four functions cannot be inlined as pointers to these
1.100 +// functions are needed for operator << (_context_t) to work.
1.101 +void json::flat(json & j) throw() { if (!j._flatten) j._flatten = j._context; }
1.102 +void json::close(json & j) throw() { j.pop_context(); }
1.103 +void json::object(json & j) throw() { j.push_context('{', '}'); }
1.104 +void json::array(json & j) throw() { j.push_context('[', ']'); }
1.105 +void json::item(json & j) throw()
1.106 +{
1.107 + while (j._context > j._contexts+1 && j._context[-1] != arr)
1.108 + j.pop_context();
1.109 +}
1.110 +
1.111 +
1.112 +json & json::operator << (json::string s) throw()
1.113 +{
1.114 + const char ctxt = _context[-1] == obj ? *_context == member ? seq : member : seq;
1.115 + context(ctxt);
1.116 + fprintf(_stream, "\"%s\"", s);
1.117 + if (ctxt == member) fputc(' ', _stream);
1.118 +
1.119 + return *this;
1.120 +}
1.121 +
1.122 +json & json::operator << (json::number f) throw() { context(seq); fprintf(_stream, "%g", f); return *this; }
1.123 +json & json::operator << (json::integer d) throw() { context(seq); fprintf(_stream, "%ld", d); return *this; }
1.124 +json & json::operator << (long unsigned d) throw() { context(seq); fprintf(_stream, "%ld", d); return *this; }
1.125 +json & json::operator << (json::boolean b) throw() { context(seq); fputs(b ? "true" : "false", _stream); return *this; }
1.126 +json & json::operator << (json::_null_t) throw() { context(seq); fputs("null",_stream); return *this; }
1.127 +
1.128 +#endif
1.129 +
