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1.5 ! millert 1: /* $OpenBSD: yylex.c,v 1.4 2001/06/17 07:30:42 deraadt Exp $ */
1.2 deraadt 2:
1.1 deraadt 3: /* yylex - scanner front-end for flex */
4:
5: /*-
6: * Copyright (c) 1990 The Regents of the University of California.
7: * All rights reserved.
8: *
9: * This code is derived from software contributed to Berkeley by
10: * Vern Paxson.
11: *
12: * The United States Government has rights in this work pursuant
13: * to contract no. DE-AC03-76SF00098 between the United States
14: * Department of Energy and the University of California.
15: *
1.4 deraadt 16: * Redistribution and use in source and binary forms, with or without
1.5 ! millert 17: * modification, are permitted provided that the following conditions
! 18: * are met:
! 19: *
! 20: * 1. Redistributions of source code must retain the above copyright
! 21: * notice, this list of conditions and the following disclaimer.
! 22: * 2. Redistributions in binary form must reproduce the above copyright
! 23: * notice, this list of conditions and the following disclaimer in the
! 24: * documentation and/or other materials provided with the distribution.
! 25: *
! 26: * Neither the name of the University nor the names of its contributors
! 27: * may be used to endorse or promote products derived from this software
! 28: * without specific prior written permission.
! 29: *
! 30: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
! 31: * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
! 32: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 33: * PURPOSE.
1.1 deraadt 34: */
35:
1.5 ! millert 36: /* $Header: /cvs/src/usr.bin/lex/yylex.c,v 1.4 2001/06/17 07:30:42 deraadt Exp $ */
1.1 deraadt 37:
38: #include <ctype.h>
39: #include "flexdef.h"
40: #include "parse.h"
41:
42:
43: /* yylex - scan for a regular expression token */
44:
45: int yylex()
46: {
47: int toktype;
48: static int beglin = false;
49: extern char *yytext;
50:
51: if ( eofseen )
52: toktype = EOF;
53: else
54: toktype = flexscan();
55:
56: if ( toktype == EOF || toktype == 0 )
57: {
58: eofseen = 1;
59:
60: if ( sectnum == 1 )
61: {
62: synerr( _( "premature EOF" ) );
63: sectnum = 2;
64: toktype = SECTEND;
65: }
66:
67: else
68: toktype = 0;
69: }
70:
71: if ( trace )
72: {
73: if ( beglin )
74: {
75: fprintf( stderr, "%d\t", num_rules + 1 );
76: beglin = 0;
77: }
78:
79: switch ( toktype )
80: {
81: case '<':
82: case '>':
83: case '^':
84: case '$':
85: case '"':
86: case '[':
87: case ']':
88: case '{':
89: case '}':
90: case '|':
91: case '(':
92: case ')':
93: case '-':
94: case '/':
95: case '\\':
96: case '?':
97: case '.':
98: case '*':
99: case '+':
100: case ',':
101: (void) putc( toktype, stderr );
102: break;
103:
104: case '\n':
105: (void) putc( '\n', stderr );
106:
107: if ( sectnum == 2 )
108: beglin = 1;
109:
110: break;
111:
112: case SCDECL:
113: fputs( "%s", stderr );
114: break;
115:
116: case XSCDECL:
117: fputs( "%x", stderr );
118: break;
119:
120: case SECTEND:
121: fputs( "%%\n", stderr );
122:
123: /* We set beglin to be true so we'll start
124: * writing out numbers as we echo rules.
125: * flexscan() has already assigned sectnum.
126: */
127: if ( sectnum == 2 )
128: beglin = 1;
129:
130: break;
131:
132: case NAME:
133: fprintf( stderr, "'%s'", nmstr );
134: break;
135:
136: case CHAR:
137: switch ( yylval )
138: {
139: case '<':
140: case '>':
141: case '^':
142: case '$':
143: case '"':
144: case '[':
145: case ']':
146: case '{':
147: case '}':
148: case '|':
149: case '(':
150: case ')':
151: case '-':
152: case '/':
153: case '\\':
154: case '?':
155: case '.':
156: case '*':
157: case '+':
158: case ',':
159: fprintf( stderr, "\\%c",
160: yylval );
161: break;
162:
163: default:
164: if ( ! isascii( yylval ) ||
165: ! isprint( yylval ) )
166: fprintf( stderr,
167: "\\%.3o",
168: (unsigned int) yylval );
169: else
170: (void) putc( yylval,
171: stderr );
172: break;
173: }
174:
175: break;
176:
177: case NUMBER:
178: fprintf( stderr, "%d", yylval );
179: break;
180:
181: case PREVCCL:
182: fprintf( stderr, "[%d]", yylval );
183: break;
184:
185: case EOF_OP:
186: fprintf( stderr, "<<EOF>>" );
187: break;
188:
189: case OPTION_OP:
190: fprintf( stderr, "%s ", yytext );
191: break;
192:
193: case OPT_OUTFILE:
194: case OPT_PREFIX:
195: case CCE_ALNUM:
196: case CCE_ALPHA:
197: case CCE_BLANK:
198: case CCE_CNTRL:
199: case CCE_DIGIT:
200: case CCE_GRAPH:
201: case CCE_LOWER:
202: case CCE_PRINT:
203: case CCE_PUNCT:
204: case CCE_SPACE:
205: case CCE_UPPER:
206: case CCE_XDIGIT:
207: fprintf( stderr, "%s", yytext );
208: break;
209:
210: case 0:
211: fprintf( stderr, _( "End Marker\n" ) );
212: break;
213:
214: default:
215: fprintf( stderr,
216: _( "*Something Weird* - tok: %d val: %d\n" ),
217: toktype, yylval );
218: break;
219: }
220: }
221:
222: return toktype;
223: }