/usr/include/casacore/casa/Json/JsonParser.h is in casacore-dev 2.2.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 | //# JsonParser.h: Class for parsing Json-style key:value lines
//# Copyright (C) 2016
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library 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 Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
#ifndef CASA_JSONPARSER_H
#define CASA_JSONPARSER_H
//# Includes
#include <casacore/casa/BasicSL/String.h>
#include <casacore/casa/Exceptions/Error.h>
extern "C" {
int JsonGramwrap(); // yywrap
}
namespace casacore {
//# Forward Declarations
class JsonValue;
class JSonKVMap;
// <summary>
// Class for parsing Json-style key:value lines.
// </summary>
// <use visibility=export>
// <reviewed reviewer="" date="" tests="tJsonKVMap">
// </reviewed>
//# <prerequisite>
//# </prerequisite>
// <synopsis>
// JsonParser is a class for parsing JSON files. Its function 'parse'
// is the main function to do so.
// It can handle any JSON file (not only those generated by JsonOut).
// It supports (i.e., strips) possible comments in C, C++ and Python style.
// It also supports complex numbers (structs with fields "r" and "i").
//
// The result of the parser is a JsonKVMap object containing all fields
// and values (scalars, arrays and structs, possibly nested in any way).
// </synopsis>
// <example>
// The following example is the opposite of the one given for class JsonOut.
// <srcblock>
// // Parse the given JSON file.
// JsonKVMap jmap = JsonParser::parseFile (fileName);
// // Check if the version is correct.
// AlwaysAssert (jmap.getInt("Version", 1) == 1, AipsError);
// uInt axis = jmap.get("Axis").getInt();
// // Get the vector of names from the map and JsonValue.
// Vector<String> names(jmap.get("Images").getArrayString());
// </srcblock>
// </example>
// <motivation>
// JSON is a commonly used interchange format.
// </motivation>
//# <todo asof="1996/03/10">
//# <li>
//# </todo>
class JsonParser
{
public:
// Parse the command in the given string and return the resulting map.
static JsonKVMap parse (const String& command);
// Parse the given file and return the resulting map.
// Comments are ignored; they can be indicated by // or # till eol
// or be enclosed in / * and * /.
static JsonKVMap parseFile (const String& fileName);
// Give the next chunk of input for the scanner.
static int input (char* buf, int max_size);
// Give the current position (for read or update).
static int& position()
{ return theirPosition; }
// A function to remove escape characters.
static String removeEscapes (const String& in);
// Let the parser set the final KeyValueMap.
static void setMap (JsonKVMap* map)
{ theirJsonMap = map; }
private:
static int theirPosition;
static const char* theirCommand;
static JsonKVMap* theirJsonMap;
};
// The global yyerror function for the parser.
// It throws an exception with the current token.
void JsonGramerror (const char*);
// </group>
} // end namespace
#endif
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