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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/* yylex - scanner front-end for flex */
/* Copyright (c) 1990 The Regents of the University of California. */
/* All rights reserved. */
/* This code is derived from software contributed to Berkeley by */
/* Vern Paxson. */
/* The United States Government has rights in this work pursuant */
/* to contract no. DE-AC03-76SF00098 between the United States */
/* Department of Energy and the University of California. */
/* This file is part of flex. */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions */
/* are met: */
/* 1. Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* 2. Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in the */
/* documentation and/or other materials provided with the distribution. */
/* Neither the name of the University nor the names of its contributors */
/* may be used to endorse or promote products derived from this software */
/* without specific prior written permission. */
/* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */
/* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */
/* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
/* PURPOSE. */
#include <ctype.h>
#include "flexdef.h"
#include "parse.h"
/* yylex - scan for a regular expression token */
int yylex()
{
int toktype;
static int beglin = false;
extern char *yytext;
if ( eofseen )
toktype = EOF;
else
toktype = flexscan();
if ( toktype == EOF || toktype == 0 )
{
eofseen = 1;
if ( sectnum == 1 )
{
synerr( _( "premature EOF" ) );
sectnum = 2;
toktype = SECTEND;
}
else
toktype = 0;
}
if ( trace )
{
if ( beglin )
{
fprintf( stderr, "%d\t", num_rules + 1 );
beglin = 0;
}
switch ( toktype )
{
case '<':
case '>':
case '^':
case '$':
case '"':
case '[':
case ']':
case '{':
case '}':
case '|':
case '(':
case ')':
case '-':
case '/':
case '\\':
case '?':
case '.':
case '*':
case '+':
case ',':
(void) putc( toktype, stderr );
break;
case '\n':
(void) putc( '\n', stderr );
if ( sectnum == 2 )
beglin = 1;
break;
case SCDECL:
fputs( "%s", stderr );
break;
case XSCDECL:
fputs( "%x", stderr );
break;
case SECTEND:
fputs( "%%\n", stderr );
/* We set beglin to be true so we'll start
* writing out numbers as we echo rules.
* flexscan() has already assigned sectnum.
*/
if ( sectnum == 2 )
beglin = 1;
break;
case NAME:
fprintf( stderr, "'%s'", nmstr );
break;
case CHAR:
switch ( yylval )
{
case '<':
case '>':
case '^':
case '$':
case '"':
case '[':
case ']':
case '{':
case '}':
case '|':
case '(':
case ')':
case '-':
case '/':
case '\\':
case '?':
case '.':
case '*':
case '+':
case ',':
fprintf( stderr, "\\%c",
yylval );
break;
default:
if ( ! isascii( yylval ) ||
! isprint( yylval ) )
fprintf( stderr,
"\\%.3o",
(unsigned int) yylval );
else
(void) putc( yylval,
stderr );
break;
}
break;
case NUMBER:
fprintf( stderr, "%d", yylval );
break;
case PREVCCL:
fprintf( stderr, "[%d]", yylval );
break;
case EOF_OP:
fprintf( stderr, "<<EOF>>" );
break;
case OPTION_OP:
fprintf( stderr, "%s ", yytext );
break;
case OPT_OUTFILE:
case OPT_PREFIX:
case CCE_ALNUM:
case CCE_ALPHA:
case CCE_BLANK:
case CCE_CNTRL:
case CCE_DIGIT:
case CCE_GRAPH:
case CCE_LOWER:
case CCE_PRINT:
case CCE_PUNCT:
case CCE_SPACE:
case CCE_UPPER:
case CCE_XDIGIT:
fprintf( stderr, "%s", yytext );
break;
case 0:
fprintf( stderr, _( "End Marker\n" ) );
break;
default:
fprintf( stderr,
_( "*Something Weird* - tok: %d val: %d\n" ),
toktype, yylval );
break;
}
}
return toktype;
}
|
