1 /*

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 *

    16 */

    17 #include "FormulaParser.h"

    18 

    19 

    20 ParseResult ParseFormula(const string& aFormula)

    21 	{

    22 	Parser cell_nameParser = Parser("B") | Parser("H") | Parser("L") | Parser("R") | Parser("T") | Parser("W") | Parser("b") | Parser("h") | Parser("l") | Parser("r") | Parser("t") | Parser("w");

    23 	cell_nameParser.SetId(cell_name_ParserId);

    24 	Parser parentParser = Parser("P");

    25 	parentParser.SetId(parent_ParserId);

    26 	Parser parent_cellParser = parentParser >> Parser("_") >> cell_nameParser;

    27 	parent_cellParser.SetId(parent_cell_ParserId);

    28 	Parser table_cellParser = Parser::Real();

    29 	table_cellParser.SetId(table_cell_ParserId);

    30 	Parser comp_cellParser = Parser::Real() >> Parser("_") >> cell_nameParser;

    31 	comp_cellParser.SetId(comp_cell_ParserId);

    32 	Parser abs_cellParser = 

    33 		Parser("$") >> 

    34 		Parser::Real() >> 

    35 		Parser("!") >> 

    36 		Parser::Real() >> 

    37 		Parser("!") >> 

    38 		cell_nameParser >> 

    39 		Parser("!$");

    40 	abs_cellParser.SetId(abs_cell_ParserId);

    41 

    42 	// types of value

    43 	Parser cellParser = 

    44 		cell_nameParser | 

    45 		parent_cellParser | 

    46 		parentParser | 

    47 		comp_cellParser | 

    48 		abs_cellParser | 

    49 		table_cellParser;

    50 

    51 	Parser unitsParser = 

    52 		Parser::Real() >> 

    53 		(Parser("u") | Parser("U"));

    54 	unitsParser.SetId(units_ParserId);

    55 

    56 	Parser constantParser = 

    57 		Parser::Real() >> 

    58 		Parser("p");

    59 	constantParser.SetId(constant_ParserId);

    60 

    61 	Parser attributeParser = 

    62 		Parser("pr") >> 

    63 		Parser::Int();

    64 	attributeParser.SetId(attribute_ParserId);

    65 

    66 	Parser mysteryParser = 

    67 		Parser::Int() >> 

    68 		Parser("pr") >> 

    69 		Parser::Int();

    70 	mysteryParser.SetId(mystery_ParserId);

    71 

    72 	// functions

    73 	Parser expressionParser;

    74 	Parser func_nameParser = Parser("CEIL") | Parser("FLOOR") | Parser("ROUND");

    75 	Parser funcParser = func_nameParser >> Parser("(") >> expressionParser >> Parser(")");

    76 	funcParser.SetId(func_ParserId);

    77 

    78 	Parser valueParser = 

    79 		unitsParser | 

    80 		mysteryParser | 

    81 		attributeParser | 

    82 		constantParser | 

    83 		funcParser | 

    84 		cellParser ;

    85 

    86 	// arithmetic expressions from boost spirit library example

    87 	Parser groupParser = Parser("(") >> expressionParser >> Parser(")");

    88 	groupParser.SetId(group_ParserId);

    89 	Parser factorParser = valueParser | groupParser;

    90 

    91 	Parser termExtStarParser;

    92 	Parser termExtParser = 

    93 		((Parser("*") >> factorParser) | 

    94 		 (Parser("/") >> factorParser)) >>

    95 		termExtStarParser;

    96 	termExtStarParser = termExtParser | Parser::Nul();

    97 

    98 	Parser termParser = 

    99 		factorParser >> 

   100 		termExtStarParser;

   101 	termParser.SetId(term_ParserId);

   102 

   103 	Parser expressionExtStarParser;

   104 	Parser expressionExtParser = 

   105 		((Parser("+") >> termParser) | 

   106 		 (Parser("-") >> termParser)) >>

   107 		expressionExtStarParser;

   108 	expressionExtStarParser = expressionExtParser | Parser::Nul();

   109 

   110 	expressionParser = 

   111 		termParser >> 

   112 		expressionExtStarParser;

   113 	expressionParser.SetId(expression_ParserId);

   114 

   115 	// comparisons

   116 	Parser comp_opParser = Parser(">=") | Parser("<=") | Parser("=") | Parser(">") | Parser("<");

   117 

   118 	Parser whitespaceParser;

   119 	Parser compParser = 

   120 		expressionParser >> 

   121 		whitespaceParser >> 

   122 		comp_opParser >> 

   123 		whitespaceParser >> 

   124 		expressionParser;

   125 	compParser.SetId(comp_ParserId);

   126 

   127 	Parser comp_groupParser = Parser("(") >> compParser >> Parser(")");

   128 	comp_groupParser.SetId(comp_group_ParserId);

   129 	Parser compOptParser = compParser | comp_groupParser;

   130 

   131 	// conditionals

   132 	Parser conditionalParser = 

   133 		Parser("IF ") >> 

   134 		compOptParser >> 

   135 		Parser(" THEN ") >> 

   136 		expressionParser >> 

   137 		Parser(" ELSE ") >> 

   138 		expressionParser;

   139 	conditionalParser.SetId(conditional_ParserId);

   140 

   141 

   142 	Parser whitespaceExtParser = Parser(" ") >> whitespaceParser;

   143 	whitespaceParser = whitespaceExtParser | Parser::Nul();

   144 

   145 	// formula

   146 	Parser formulaParser = conditionalParser | expressionParser;

   147 

   148 

   149 	return formulaParser.Parse(aFormula);

   150 	}