blob: 345d2ff4727904188db4cb0c59fd8f7d81c2665e (
plain)
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
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#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);
/// @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:
void BeginSource();
intt CurPos() const;
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
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
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
