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
|
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: tkpchars.hxx,v $
* $Revision: 1.4 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef ADC_TKPCHARS_HXX
#define ADC_TKPCHARS_HXX
// USED SERVICES
// BASE CLASSES
// COMPONENTS
// PARAMETRS
#include <adc_cl.hxx>
#include <stack>
/** @descr
dpSource:
1||||||||||||||||||||||a||||||||||||b|||c||||||||||||||||||||...
1 := first character of Sourcecode.
a := nLastTokenStart, there starts the last cut token.
b := nLastCut, there is a '\0'-char which marks the end of
the last cut token. The original character at b is stored
in cCharAtLastCut and will replace the '\0'-char, when the
next token is cut.
c := The current cursor position.
@needs cosv.lib
@use This class can be used by any parser to get the chars of a
text one by one and separate them to tokens.
**/
class CharacterSource
{
public:
// LIFECYCLE
CharacterSource();
~CharacterSource();
// OPERATIONS
/** Loads the complete contents of in_rSource into the classes private memory.
If in_rSource is a file, it has to be open of course.
After loading the text, the CurChar() is set on the begin of the text.
**/
void LoadText(
csv::bstream & io_rSource);
/** Loads the complete contents of in_rSource into the classes private memory.
If in_rSource is a file, it has to be open of course.
After loading the text, the CurChar() is set on the begin of the text.
**/
void LoadText(
const char * i_sSourceText );
void InsertTextAtCurPos(
const char * i_sText2Insert );
/// @return CurChar() after moving forward one char.
char MoveOn();
/** @return
The token which starts at the char which was CurChar(), when
CutToken() was called the last time - or at the beginning of the text.
The token ends by the CurChar() being replaced by a '\0'.
Value is valid until the next call of CutToken() or ~CharacterSource().
**/
const char * CutToken();
// INQUIRY
char CurChar() const;
/// @return The result of the last CutToken(). Or NULL, if there was none yet.
const char * CurToken() const;
// INQUIRY
/// @return true, if
bool IsFinished() const;
private:
struct S_SourceState
{
DYN char * dpSource;
intt nSourceSize;
intt nCurPos;
intt nLastCut;
intt nLastTokenStart;
char cCharAtLastCut;
S_SourceState(
DYN char * dpSource,
intt nSourceSize,
intt nCurPos,
intt nLastCut,
intt nLastTokenStart,
char cCharAtLastCut );
};
void BeginSource();
intt CurPos() const;
char MoveOn_OverStack();
// DATA
std::stack< S_SourceState >
aSourcesStack;
DYN char * dpSource;
intt nSourceSize;
intt nCurPos;
intt nLastCut;
intt nLastTokenStart;
char cCharAtLastCut;
};
inline char
CharacterSource::MoveOn()
{
if (DEBUG_ShowText())
{
Cerr() << char(dpSource[nCurPos+1]) << Flush();
}
if ( nCurPos < nSourceSize-1 )
return dpSource[++nCurPos];
else if ( aSourcesStack.size() > 0 )
return MoveOn_OverStack();
else
return dpSource[nCurPos = nSourceSize];
}
inline char
CharacterSource::CurChar() const
{ return nCurPos != nLastCut ? dpSource[nCurPos] : cCharAtLastCut; }
inline const char *
CharacterSource::CurToken() const
{ return &dpSource[nLastTokenStart]; }
inline bool
CharacterSource::IsFinished() const
{ return nCurPos >= nSourceSize; }
inline intt
CharacterSource::CurPos() const
{ return nCurPos; }
#endif
|