3 * Copyright (c) 1980, 1993
4 * The Regents of the University of California. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
17 * California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * @(#)lang.l 8.1 (Berkeley) 6/6/93
47 * Data for returning to previous files from include files.
50 struct incl *in_prev; /* previous includes in effect, if any */
51 YY_BUFFER_STATE in_buf; /* previous lex state */
52 const char *in_fname; /* previous file name */
53 int in_lineno; /* previous line number */
54 int in_ateof; /* token to insert at EOF */
56 static struct incl *inclp;
57 static const char *lastfile;
73 { "machine", ARCH }, /* MACHINE is defined in /sys/param.h */
74 { "makeoptions", MAKEOPTIONS },
75 { "maxusers", MAXUSERS },
76 { "profile", PROFILE },
77 { "option", OPTIONS },
78 { "options", OPTIONS },
79 { "include", INCLUDE },
84 static int endinclude(void);
85 int include(const char *, int);
86 int kw_lookup(char *);
89 int yyerror(const char *);
92 WORD [A-Za-z_][-A-Za-z_]*
93 ID [A-Za-z_][-A-Za-z_0-9]*
100 if ((i = kw_lookup(yytext)) == -1)
102 yylval.str = strdup(yytext);
107 <INITIAL>{WORD}/[0-9]* {
110 if ((i = kw_lookup(yytext)) == -1)
118 yylval.str = strdup(yytext);
123 yytext[yyleng-2] = '"';
124 yytext[yyleng-1] = '\0';
125 yylval.str = strdup(yytext + 1);
130 yytext[yyleng-1] = '\0';
131 yylval.str = strdup(yytext + 1);
136 yylval.str = strdup(yytext);
140 yylval.val = octal(yytext);
144 yylval.val = hex(yytext);
148 yylval.val = atoi(yytext);
162 #.* { /* Ignored (comment) */; }
163 [ \t\f]* { /* Ignored (white space) */; }
164 ";" { return SEMICOLON; }
165 "," { return COMMA; }
166 "=" { BEGIN TOEOL; return EQUALS; }
175 /* otherwise continue scanning */
177 . { return yytext[0]; }
182 * Look up a string in the keyword table. Returns a -1 if the
183 * string is not a keyword otherwise it returns the keyword number
187 kw_lookup(char *word)
191 for (kp = key_words; kp->kt_name != 0; kp++)
192 if (eq(word, kp->kt_name))
198 * Number conversion routines
206 (void) sscanf(str, "%o", &num);
215 (void) sscanf(str+2, "%x", &num);
221 * Open the named file for inclusion at the current point. Returns 0 on
222 * success (file opened and previous state pushed), nonzero on failure
223 * (fopen failed, complaint made). The `ateof' parameter controls the
224 * token to be inserted at the end of the include file. If ateof == 0,
225 * then nothing is inserted.
228 include(const char *fname, int ateof)
233 fp = fopen(fname, "r");
235 yyerror("cannot open file");
238 in = malloc(sizeof(*in));
241 in->in_buf = YY_CURRENT_BUFFER;
242 in->in_fname = yyfile;
243 in->in_lineno = yyline;
244 in->in_ateof = ateof;
246 yy_switch_to_buffer(yy_create_buffer(fp, YY_BUF_SIZE));
253 * Terminate the most recent inclusion.
265 yy_delete_buffer(YY_CURRENT_BUFFER);
267 yy_switch_to_buffer(in->in_buf);
268 yyfile = in->in_fname;
269 yyline = in->in_lineno;
270 ateof = in->in_ateof;