Annotation of src/usr.bin/compile_et/et_lex.lex.l, Revision 1.4
1.1 downsj 1: %{
1.3 hin 2: /*
3: * Copyright (c) 1998 Kungliga Tekniska Högskolan
4: * (Royal Institute of Technology, Stockholm, Sweden).
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: *
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: *
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: *
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by Kungliga Tekniska
21: * Högskolan and its contributors.
22: *
23: * 4. Neither the name of the Institute nor the names of its contributors
24: * may be used to endorse or promote products derived from this software
25: * without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30: * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
31: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37: * SUCH DAMAGE.
38: */
39:
40: /*
41: * This is to handle the definition of this symbol in some AIX
42: * headers, which will conflict with the definition that lex will
43: * generate for it. It's only a problem for AIX lex.
44: */
45:
46: #undef ECHO
47:
48: #include "compile_et.h"
49: #include "error_table.h"
50:
51: /* RCSID("$KTH: lex.l,v 1.4 1998/11/20 05:58:52 assar Exp $"); */
52:
53: static unsigned lineno = 1;
54: void error_message(char *, ...);
55: int getstring(void);
1.4 ! deraadt 56: int yylex(void);
1.3 hin 57:
1.1 downsj 58: %}
59:
1.3 hin 60:
61: %%
62: et { return ET; }
63: error_table { return ET; }
64: ec { return EC; }
65: error_code { return EC; }
66: prefix { return PREFIX; }
67: index { return INDEX; }
68: id { return ID; }
69: end { return END; }
70: [0-9]+ { yylval.number = atoi(yytext); return NUMBER; }
71: #[^\n]* ;
72: [ \t] ;
73: \n { lineno++; }
74: \" { return getstring(); }
75: [a-zA-Z0-9_]+ { yylval.string = strdup(yytext); return STRING; }
76: . { return *yytext; }
1.1 downsj 77: %%
78:
1.3 hin 79: #ifndef yywrap /* XXX */
80: int
81: yywrap ()
82: {
83: return 1;
84: }
85: #endif
1.1 downsj 86:
1.3 hin 87: int
88: getstring(void)
89: {
90: char x[128];
91: int i = 0;
92: int c;
93: int quote = 0;
94: while((c = input()) != EOF){
95: if(quote) {
96: x[i++] = c;
97: quote = 0;
98: continue;
99: }
100: if(c == '\n'){
101: error_message("unterminated string");
102: lineno++;
103: break;
104: }
105: if(c == '\\'){
106: quote++;
107: continue;
108: }
109: if(c == '\"')
110: break;
111: x[i++] = c;
112: }
113: x[i] = '\0';
114: yylval.string = strdup(x);
115: return STRING;
116: }
117:
118: void
119: error_message (char *format, ...)
120: {
121: va_list args;
122:
123: va_start (args, format);
124: fprintf (stderr, "%s:%d:", filename, lineno);
125: vfprintf (stderr, format, args);
126: va_end (args);
127: numerror++;
128: }