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
|
/*
* Anarres C Preprocessor
* Copyright (C) 2007 Shevek
*
* 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.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.anarres.cpp;
import java.io.Reader;
import java.io.PushbackReader;
import java.io.IOException;
/* pp */ class JoinReader extends Reader {
private Reader in;
private boolean trigraphs;
private int newlines;
private boolean flushnl;
private int[] unget;
private int uptr;
public JoinReader(Reader in, boolean trigraphs) {
this.in = in;
this.trigraphs = trigraphs;
this.newlines = 0;
this.flushnl = false;
this.unget = new int[2];
this.uptr = 0;
}
public JoinReader(Reader in) {
this(in, false);
}
private int __read() throws IOException {
if (uptr > 0)
return unget[--uptr];
return in.read();
}
private void _unread(int c) {
if (c != -1)
unget[uptr++] = c;
}
private int _read() throws IOException {
int c = __read();
if (c == '?' && trigraphs) {
int d = __read();
if (d == '?') {
int e = __read();
switch (e) {
case '(': return '[';
case ')': return ']';
case '<': return '{';
case '>': return '}';
case '=': return '#';
case '/': return '\\';
case '\'': return '^';
case '!': return '|';
case '-': return '~';
}
_unread(e);
}
_unread(d);
}
return c;
}
public int read() throws IOException {
if (flushnl) {
if (newlines > 0) {
newlines--;
return '\n';
}
flushnl = false;
}
for (;;) {
int c = _read();
switch (c) {
case '\\':
int d = _read();
switch (d) {
case '\n':
newlines++;
continue;
case '\r':
newlines++;
int e = _read();
if (e != '\n')
_unread(e);
continue;
default:
_unread(d);
return c;
}
case '\r':
case '\n':
case '\u2028':
case '\u2029':
case '\u000B':
case '\u000C':
case '\u0085':
flushnl = true;
return c;
case -1:
if (newlines > 0) {
newlines--;
return '\n';
}
default:
return c;
}
}
}
public int read(char cbuf[], int off, int len)
throws IOException {
for (int i = 0; i < len; i++) {
int ch = read();
if (ch == -1)
return i;
cbuf[off + i] = (char)ch;
}
return len;
}
public void close()
throws IOException {
in.close();
}
public String toString() {
return "JoinReader(nl=" + newlines + ")";
}
/*
public static void main(String[] args) throws IOException {
FileReader f = new FileReader(new File(args[0]));
BufferedReader b = new BufferedReader(f);
JoinReader r = new JoinReader(b);
BufferedWriter w = new BufferedWriter(
new java.io.OutputStreamWriter(System.out)
);
int c;
while ((c = r.read()) != -1) {
w.write((char)c);
}
w.close();
}
*/
}
|
