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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/***************************************************************************
parser.h - Internal parser
-------------------
copyright : (C) 2004 Michal Rudolf <mrudolf@kdewebdwev.org>
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of 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. *
* *
***************************************************************************/
#ifndef _HAVE_PARSER_H_
#define _HAVE_PARSER_H_
#include "kommander_export.h"
#include "parsenode.h"
#include <tqvaluevector.h>
#include <tqstringlist.h>
#include <tqmap.h>
class KommanderWidget;
class ParserData;
class Parser
{
public:
Parser(ParserData* data);
Parser(ParserData* data, const TQString& expr);
// set string to parse
bool setString(const TQString& s);
// set Kommander widget associated with parser
void setWidget(KommanderWidget* w);
// parse generic expression
TQString expression(Parse::Mode mode = Parse::Execute);
// execute single command; return true if ok
bool command(Parse::Mode mode = Parse::Execute);
// special class method to execute single parser function without creating parser object
static TQString function(ParserData* data, const TQString& name, const TQStringList& params);
// execute whole block; return true if ok
bool parse(Parse::Mode mode = Parse::Execute);
// return line of errorneous node
int errorLine() const;
// return error message
TQString errorMessage() const;
// check if this is a name of standard variable
bool isVariable(const TQString& name) const;
// set variable value
void setVariable(const TQString& name, ParseNode value);
// unset variable
void unsetVariable(const TQString& key);
// get variable value
ParseNode variable(const TQString& name) const;
// access associative array
const TQMap<TQString, ParseNode>& array(const TQString& name) const;
// check if this is a name of an array
bool isArray(const TQString& name) const;
// set array key
void setArray(const TQString& name, const TQString& key, ParseNode value);
// unset array key or whole array
void unsetArray(const TQString& name, const TQString& key = TQString::null);
// array value
ParseNode arrayValue(const TQString& name, const TQString& key) const;
// get associated widget
KommanderWidget* currentWidget() const;
private:
// parsing function - top-down approach
// parse const
ParseNode parseConstant(Parse::Mode mode = Parse::Execute);
// parse value (literal or variable)
ParseNode parseValue(Parse::Mode mode = Parse::Execute);
// parse multiplication, division and mod (x*y, x/y, x%y)
ParseNode parseMultiply(Parse::Mode mode = Parse::Execute);
// parse sum (x+y, x-y)
ParseNode parseAdd(Parse::Mode mode = Parse::Execute);
// parse signed numeric (+x, -x)
ParseNode parseSignedNumber(Parse::Mode mode = Parse::Execute);
/*
// parse string expression
ParseNode parseStringValue(Parse::Mode mode = Parse::Execute);
// parse string concatenation (x+y)
ParseNode parseConcatenation(Parse::Mode mode = Parse::Execute);
*/
// parse comparisons (x==y, x<y, x>y, x!=y, x<>y, x<=y, x>=y
ParseNode parseComparison(Parse::Mode mode = Parse::Execute);
// parse boolean not (!x, not x)
ParseNode parseNot(Parse::Mode mode = Parse::Execute);
// parse boolean and (x&&y, x and y)
ParseNode parseAnd(Parse::Mode mode = Parse::Execute);
// parse boolean or (x||y, x or y)
ParseNode parseOr(Parse::Mode mode = Parse::Execute);
// parse generic condition
ParseNode parseCondition(Parse::Mode mode = Parse::Execute);
// parse (x) expression
ParseNode parseParenthesis(Parse::Mode mode = Parse::Execute);
// parse generic expression
ParseNode parseExpression(Parse::Mode mode = Parse::Execute);
// parse parameters
ParseNode parseFunction(Parse::Mode mode = Parse::Execute);
// parse widget function
ParseNode parseWidget(Parse::Mode mode = Parse::Execute, const TQString &widgetName = TQString::null);
// parse assignment
ParseNode parseAssignment(Parse::Mode mode = Parse::Execute);
// parse conditional
Parse::Flow parseIf(Parse::Mode mode = Parse::Execute);
// parse assignment
Parse::Flow parseCommand(Parse::Mode mode = Parse::Execute);
// parse while loop
Parse::Flow parseWhile(Parse::Mode mode = Parse::Execute);
// parse for loop
Parse::Flow parseFor(Parse::Mode mode = Parse::Execute);
// parse foreach loop
Parse::Flow parseForeach(Parse::Mode mode = Parse::Execute);
// parse switch block
void parseSwitch(Parse::Mode mode = Parse::Execute);
// parse whole block
Parse::Flow parseBlock(Parse::Mode mode = Parse::Execute);
// insert next node
void insertNode(ParseNode p, int line);
// next item to be parsed
ParseNode next() const;
// check if next item is keyword k, if so - go further, if no, set error
bool tryKeyword(Parse::Keyword k, Parse::Mode mode = Parse::Execute);
// check if next item is a variable, if so, return its name
bool tryVariable(Parse::Mode mode = Parse::Execute);
// get the name of the next node treated as variable
TQString nextVariable(Parse::Mode mode = Parse::Execute);
// check whether variable/array name is global (preceded with _)
bool isGlobal(const TQString& name) const;
// check if next item is a function
bool isFunction() const;
// check if next item is a widget
bool isWidget() const;
// reset to default state
void reset();
// set error state if no error was set before; err is expected symbol that wasn't found
void setError(const TQString& msg);
void setError(const TQString& msg, int pos);
// check whether parsing was successful
bool isError() const;
// parsing data
ParserData* m_data;
// current parsing position
uint m_start;
// current error message
TQString m_error;
// in case of error, this keeps position of first error
uint m_errorPosition;
// parsing nodes
TQValueVector<ParseNode> m_parts;
// variables
TQMap<TQString, ParseNode> m_variables;
// arrays
TQMap<TQString, TQMap<TQString, ParseNode> > m_arrays;
// Kommander
KommanderWidget* m_widget;
// global variables
static TQMap<TQString, ParseNode> m_globalVariables;
// global arrays
static TQMap<TQString, TQMap<TQString, ParseNode> > m_globalArrays;
};
#endif
|
