1 /*
2 * This file is part of flex.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE.
22 */
23
24 %{
25 /* A scanner file to build "scanner.c".
26 Input language is any text.
27 "#include <filename>" causes a buffer switch.
28 */
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include "config.h"
32
33 int error = 0;
34 %}
35
36 %option 8bit prefix="test"
37 %option nounput nomain noyywrap noinput
38 %option warn
39
40 %x GET_FILENAME
41
42 %%
43
44 <INITIAL>{
45 ^"#include"[[:blank:]]+"<" { BEGIN(GET_FILENAME); }
46 .|\n { ECHO; }
47 }
48
49 <GET_FILENAME>{
50 [[:alnum:]_.-]+> {
51 /* recurse */
52 yytext[yyleng-1]='\0';
53 if((yyin=fopen(yytext,"r"))==NULL) {
54 fprintf(stderr,"*** Error: Could not open include file \"%s\".\n",yytext);
55 error = 1;
56 yyterminate();
57 }
58 testpush_buffer_state( yy_create_buffer( yyin, YY_BUF_SIZE ));
59 BEGIN(0);
60 }
61 .|\n {
62 fprintf(stderr,"Invalid input \"%s\".\n", yytext);
63 error = 1;
64 yyterminate();
65 }
66 }
67
68 <<EOF>> {
69 fclose(yyin);
70 testpop_buffer_state();
71 if(!YY_CURRENT_BUFFER)
72 yyterminate();
73 }
74
75 %%
76
77 int main(int argc, char** argv);
78
79 int
main(int argc,char ** argv)80 main ( int argc, char** argv )
81 {
82 FILE * fp;
83 if( argc != 2 ) {
84 fprintf(stderr,"*** Error: Must specify one filename.\n");
85 exit(-1);
86 }
87 if((fp=fopen(argv[1],"r"))==NULL) {
88 fprintf(stderr,"*** Error: fopen(%s) failed.\n",argv[1]);
89 exit(-1);
90 }
91 yyin = fp;
92 yyout = stdout;
93 yylex();
94 if (!error)
95 printf("TEST RETURNING OK.\n");
96 else
97 exit(-1);
98 return 0;
99 }
100