/[hydra]/hydra/src/boa_lexer.l
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Contents of /hydra/src/boa_lexer.l

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Revision 1.4 - (show annotations)
Thu Sep 26 14:02:11 2002 UTC (19 years, 2 months ago) by nmav
Branch: MAIN
CVS Tags: hydra_0_1_6_without_hic, hydra_0_0_10, hydra_0_0_8, hydra_0_0_9, hydra_0_0_2, hydra_0_0_3, hydra_0_0_6, hydra_0_0_7, hydra_0_0_4, hydra_0_0_5, hydra_0_1_3, hydra_0_1_2, hydra_0_1_1, hydra_0_1_0, hydra_0_1_7, hydra_0_1_6, hydra_0_1_4, hydra_0_1_8, HEAD
Branch point for: hydra_0_1_0_patches
Changes since 1.3: +2 -2 lines
*** empty log message ***

1 %{
2
3 /*
4 * Boa, an http server
5 * Copyright (C) 1995 Paul Phillips <psp@well.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 1, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 *
21 */
22
23 /* $Id: boa_lexer.l,v 1.3 2002/09/25 07:33:35 nmav Exp $*/
24
25 #include "boa_grammar.h"
26 #include <stdlib.h>
27 #include <unistd.h>
28 #include "parse.h"
29
30 #define MAX_STR_CONST 1024
31 #define qspush(c) \
32 if (string_buf_ptr < string_buf+MAX_STR_CONST) \
33 *string_buf_ptr++ = c; \
34 else \
35 yyerror("quoted string overflow");
36
37 char *mime_types = NULL;
38
39 static int file = 0;
40 int lineno = 1;
41 struct ccommand *k;
42 char string_buf[MAX_STR_CONST];
43 char *string_buf_ptr;
44 %}
45
46 %s MIME
47 /* Quoted string handling (almost) straight out of
48 the flex 2.5 man page, April 1995 */
49 %x STR
50
51 %%
52
53 [ \t]+ ;
54 #.* ;
55
56 <MIME>[^ \t\n]+\/[^ \t\n]+ { yylval.sval = yytext; return MIMETYPE; }
57
58
59 [^ \"\t\n]+ { /* XXX could use better checks that we are in a state to
60 * accept keywords; this version matches original behavior */
61 if ((YYSTATE==INITIAL) && (k=lookup_keyword(yytext))) {
62 yylval.cval=k;
63 return (k->type);
64 } else { yylval.sval = yytext; return STRING; }
65 }
66
67 \" {
68 string_buf_ptr = string_buf;
69 BEGIN(STR);
70 }
71
72 <STR>{
73 \" { /* saw closing quote - all done */
74 BEGIN(INITIAL);
75 *string_buf_ptr = '\0';
76 /* return string constant token type and value to parser */
77 yylval.sval = string_buf; return STRING;
78 }
79
80 \n {
81 /* error - unterminated string constant */
82 /* generate error message */
83 yyerror("unterminated string constant");
84 }
85
86 \\[0-7]{1,3} {
87 /* octal escape sequence */
88 int result;
89
90 (void) sscanf( yytext + 1, "%o", &result );
91
92 if ( result > 0xff )
93 { /* error, constant is out-of-bounds */ }
94
95 qspush(result);
96 }
97
98 \\[0-9]+ {
99 /* generate error - bad escape sequence; something
100 * like '\48' or '\0777777'
101 */
102 yyerror("bad escape sequence");
103 }
104
105 \\n qspush('\n');
106 \\t qspush('\t');
107 \\r qspush('\r');
108 \\b qspush('\b');
109 \\f qspush('\f');
110
111
112 \\(.|\n) *string_buf_ptr++ = yytext[1];
113
114 [^\\\n\"]+ {
115 char *yptr = yytext;
116 while ( *yptr )
117 qspush(*yptr++);
118 }
119 }
120 /* End of <STR> dependence */
121 \n { lineno++; }
122 %%
123
124 /* In yywrap we track which file we are on.
125 * 1: close hydra.conf, open mime.types
126 * 2: return 1;
127 */
128
129 int yywrap()
130 {
131 fclose(yyin);
132 file++;
133
134 switch(file) {
135 case 1:
136 yyin = fopen(mime_types, "r");
137 if(!yyin) {
138 fprintf(stderr, "Could not open mime.types file, \"%s\", "
139 "for reading\n", mime_types);
140 exit(1);
141 }
142 BEGIN MIME;
143 return 0;
144 default:
145 BEGIN INITIAL;
146 file = 0; /* in case we reread config files */
147 return 1;
148 }
149 }
150
151 int yyerror(char * msg)
152 {
153 fprintf(stderr, "Error on line %d of %s: %s\n", lineno,
154 (file == 0 ? "hydra.conf" : "mime.types"), msg);
155 return 1;
156 }
157

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