1*b1cdbd2cSJim Jagielski /**************************************************************
2*b1cdbd2cSJim Jagielski *
3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one
4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file
5*b1cdbd2cSJim Jagielski * distributed with this work for additional information
6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file
7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the
8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance
9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at
10*b1cdbd2cSJim Jagielski *
11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0
12*b1cdbd2cSJim Jagielski *
13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing,
14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an
15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the
17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations
18*b1cdbd2cSJim Jagielski * under the License.
19*b1cdbd2cSJim Jagielski *
20*b1cdbd2cSJim Jagielski *************************************************************/
21*b1cdbd2cSJim Jagielski
22*b1cdbd2cSJim Jagielski
23*b1cdbd2cSJim Jagielski
24*b1cdbd2cSJim Jagielski #ifndef ADC_TKPCHARS_HXX
25*b1cdbd2cSJim Jagielski #define ADC_TKPCHARS_HXX
26*b1cdbd2cSJim Jagielski
27*b1cdbd2cSJim Jagielski // USED SERVICES
28*b1cdbd2cSJim Jagielski // BASE CLASSES
29*b1cdbd2cSJim Jagielski // COMPONENTS
30*b1cdbd2cSJim Jagielski // PARAMETRS
31*b1cdbd2cSJim Jagielski #include <adc_cl.hxx>
32*b1cdbd2cSJim Jagielski #include <stack>
33*b1cdbd2cSJim Jagielski
34*b1cdbd2cSJim Jagielski
35*b1cdbd2cSJim Jagielski
36*b1cdbd2cSJim Jagielski /** @descr
37*b1cdbd2cSJim Jagielski
38*b1cdbd2cSJim Jagielski dpSource:
39*b1cdbd2cSJim Jagielski
40*b1cdbd2cSJim Jagielski 1||||||||||||||||||||||a||||||||||||b|||c||||||||||||||||||||...
41*b1cdbd2cSJim Jagielski
42*b1cdbd2cSJim Jagielski
43*b1cdbd2cSJim Jagielski 1 := first character of Sourcecode.
44*b1cdbd2cSJim Jagielski a := nLastTokenStart, there starts the last cut token.
45*b1cdbd2cSJim Jagielski b := nLastCut, there is a '\0'-char which marks the end of
46*b1cdbd2cSJim Jagielski the last cut token. The original character at b is stored
47*b1cdbd2cSJim Jagielski in cCharAtLastCut and will replace the '\0'-char, when the
48*b1cdbd2cSJim Jagielski next token is cut.
49*b1cdbd2cSJim Jagielski c := The current cursor position.
50*b1cdbd2cSJim Jagielski
51*b1cdbd2cSJim Jagielski
52*b1cdbd2cSJim Jagielski @needs cosv.lib
53*b1cdbd2cSJim Jagielski
54*b1cdbd2cSJim Jagielski @use This class can be used by any parser to get the chars of a
55*b1cdbd2cSJim Jagielski text one by one and separate them to tokens.
56*b1cdbd2cSJim Jagielski **/
57*b1cdbd2cSJim Jagielski
58*b1cdbd2cSJim Jagielski class CharacterSource
59*b1cdbd2cSJim Jagielski {
60*b1cdbd2cSJim Jagielski public:
61*b1cdbd2cSJim Jagielski // LIFECYCLE
62*b1cdbd2cSJim Jagielski CharacterSource();
63*b1cdbd2cSJim Jagielski ~CharacterSource();
64*b1cdbd2cSJim Jagielski
65*b1cdbd2cSJim Jagielski // OPERATIONS
66*b1cdbd2cSJim Jagielski /** Loads the complete contents of in_rSource into the classes private memory.
67*b1cdbd2cSJim Jagielski If in_rSource is a file, it has to be open of course.
68*b1cdbd2cSJim Jagielski After loading the text, the CurChar() is set on the begin of the text.
69*b1cdbd2cSJim Jagielski **/
70*b1cdbd2cSJim Jagielski void LoadText(
71*b1cdbd2cSJim Jagielski csv::bstream & io_rSource);
72*b1cdbd2cSJim Jagielski
73*b1cdbd2cSJim Jagielski void InsertTextAtCurPos(
74*b1cdbd2cSJim Jagielski const char * i_sText2Insert );
75*b1cdbd2cSJim Jagielski
76*b1cdbd2cSJim Jagielski /// @return CurChar() after moving forward one char.
77*b1cdbd2cSJim Jagielski char MoveOn();
78*b1cdbd2cSJim Jagielski /** @return
79*b1cdbd2cSJim Jagielski The token which starts at the char which was CurChar(), when
80*b1cdbd2cSJim Jagielski CutToken() was called the last time - or at the beginning of the text.
81*b1cdbd2cSJim Jagielski The token ends by the CurChar() being replaced by a '\0'.
82*b1cdbd2cSJim Jagielski
83*b1cdbd2cSJim Jagielski Value is valid until the next call of CutToken() or ~CharacterSource().
84*b1cdbd2cSJim Jagielski **/
85*b1cdbd2cSJim Jagielski const char * CutToken();
86*b1cdbd2cSJim Jagielski
87*b1cdbd2cSJim Jagielski // INQUIRY
88*b1cdbd2cSJim Jagielski char CurChar() const;
89*b1cdbd2cSJim Jagielski /// @return The result of the last CutToken(). Or NULL, if there was none yet.
90*b1cdbd2cSJim Jagielski const char * CurToken() const;
91*b1cdbd2cSJim Jagielski
92*b1cdbd2cSJim Jagielski // INQUIRY
93*b1cdbd2cSJim Jagielski /// @return true, if
94*b1cdbd2cSJim Jagielski bool IsFinished() const;
95*b1cdbd2cSJim Jagielski
96*b1cdbd2cSJim Jagielski private:
97*b1cdbd2cSJim Jagielski struct S_SourceState
98*b1cdbd2cSJim Jagielski {
99*b1cdbd2cSJim Jagielski DYN char * dpSource;
100*b1cdbd2cSJim Jagielski intt nSourceSize;
101*b1cdbd2cSJim Jagielski
102*b1cdbd2cSJim Jagielski intt nCurPos;
103*b1cdbd2cSJim Jagielski intt nLastCut;
104*b1cdbd2cSJim Jagielski intt nLastTokenStart;
105*b1cdbd2cSJim Jagielski char cCharAtLastCut;
106*b1cdbd2cSJim Jagielski
107*b1cdbd2cSJim Jagielski S_SourceState(
108*b1cdbd2cSJim Jagielski DYN char * dpSource,
109*b1cdbd2cSJim Jagielski intt nSourceSize,
110*b1cdbd2cSJim Jagielski intt nCurPos,
111*b1cdbd2cSJim Jagielski intt nLastCut,
112*b1cdbd2cSJim Jagielski intt nLastTokenStart,
113*b1cdbd2cSJim Jagielski char cCharAtLastCut );
114*b1cdbd2cSJim Jagielski };
115*b1cdbd2cSJim Jagielski
116*b1cdbd2cSJim Jagielski void BeginSource();
117*b1cdbd2cSJim Jagielski intt CurPos() const;
118*b1cdbd2cSJim Jagielski char MoveOn_OverStack();
119*b1cdbd2cSJim Jagielski
120*b1cdbd2cSJim Jagielski // DATA
121*b1cdbd2cSJim Jagielski std::stack< S_SourceState >
122*b1cdbd2cSJim Jagielski aSourcesStack;
123*b1cdbd2cSJim Jagielski
124*b1cdbd2cSJim Jagielski DYN char * dpSource;
125*b1cdbd2cSJim Jagielski intt nSourceSize;
126*b1cdbd2cSJim Jagielski
127*b1cdbd2cSJim Jagielski intt nCurPos;
128*b1cdbd2cSJim Jagielski intt nLastCut;
129*b1cdbd2cSJim Jagielski intt nLastTokenStart;
130*b1cdbd2cSJim Jagielski char cCharAtLastCut;
131*b1cdbd2cSJim Jagielski };
132*b1cdbd2cSJim Jagielski
133*b1cdbd2cSJim Jagielski
134*b1cdbd2cSJim Jagielski inline char
MoveOn()135*b1cdbd2cSJim Jagielski CharacterSource::MoveOn()
136*b1cdbd2cSJim Jagielski {
137*b1cdbd2cSJim Jagielski if (DEBUG_ShowText())
138*b1cdbd2cSJim Jagielski {
139*b1cdbd2cSJim Jagielski Cerr() << char(dpSource[nCurPos+1]) << Flush();
140*b1cdbd2cSJim Jagielski }
141*b1cdbd2cSJim Jagielski if ( nCurPos < nSourceSize-1 )
142*b1cdbd2cSJim Jagielski return dpSource[++nCurPos];
143*b1cdbd2cSJim Jagielski else if ( aSourcesStack.size() > 0 )
144*b1cdbd2cSJim Jagielski return MoveOn_OverStack();
145*b1cdbd2cSJim Jagielski else
146*b1cdbd2cSJim Jagielski return dpSource[nCurPos = nSourceSize];
147*b1cdbd2cSJim Jagielski }
148*b1cdbd2cSJim Jagielski inline char
CurChar() const149*b1cdbd2cSJim Jagielski CharacterSource::CurChar() const
150*b1cdbd2cSJim Jagielski { return nCurPos != nLastCut ? dpSource[nCurPos] : cCharAtLastCut; }
151*b1cdbd2cSJim Jagielski inline const char *
CurToken() const152*b1cdbd2cSJim Jagielski CharacterSource::CurToken() const
153*b1cdbd2cSJim Jagielski { return &dpSource[nLastTokenStart]; }
154*b1cdbd2cSJim Jagielski inline bool
IsFinished() const155*b1cdbd2cSJim Jagielski CharacterSource::IsFinished() const
156*b1cdbd2cSJim Jagielski { return nCurPos >= nSourceSize; }
157*b1cdbd2cSJim Jagielski inline intt
CurPos() const158*b1cdbd2cSJim Jagielski CharacterSource::CurPos() const
159*b1cdbd2cSJim Jagielski { return nCurPos; }
160*b1cdbd2cSJim Jagielski
161*b1cdbd2cSJim Jagielski
162*b1cdbd2cSJim Jagielski
163*b1cdbd2cSJim Jagielski
164*b1cdbd2cSJim Jagielski #endif
165*b1cdbd2cSJim Jagielski
166*b1cdbd2cSJim Jagielski
167