| /* |
| * This file is part of flex. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| f * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE. |
| */ |
| |
| %{ |
| /* A scanner file to build "scanner.c". |
| Input language is any text. |
| "#include <filename>" causes a buffer switch. |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include "config.h" |
| |
| int error = 0; |
| %} |
| |
| %option 8bit prefix="test" |
| %option nounput nomain noyywrap noinput |
| %option warn |
| |
| %x GET_FILENAME |
| %{ |
| |
| #define MAX_INCLUDE_DEPTH 10 |
| YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH]; |
| int include_stack_ptr = 0; |
| %} |
| %% |
| |
| <INITIAL>{ |
| ^"#include"[[:blank:]]+"<" { BEGIN(GET_FILENAME); } |
| .|\n { ECHO; } |
| } |
| |
| <GET_FILENAME>{ |
| [[:alnum:]_.-]+> { |
| /* recurse */ |
| yytext[yyleng-1]='\0'; |
| include_stack[include_stack_ptr++] = YY_CURRENT_BUFFER; |
| if((yyin=fopen(yytext,"r"))==NULL) { |
| fprintf(stderr,"*** Error: Could not open include file \"%s\".\n",yytext); |
| error = 1; |
| yyterminate(); |
| } |
| yy_switch_to_buffer( yy_create_buffer( yyin, YY_BUF_SIZE )); |
| BEGIN(0); |
| } |
| .|\n { |
| fprintf(stderr,"Invalid input \"%s\".\n", yytext); |
| error = 1; |
| yyterminate(); |
| } |
| } |
| |
| <<EOF>> { |
| if ( --include_stack_ptr < 0 ) { |
| yyterminate(); |
| } |
| else { |
| fclose(yyin); |
| yy_delete_buffer( YY_CURRENT_BUFFER ); |
| yy_switch_to_buffer( include_stack[include_stack_ptr] ); |
| } |
| } |
| |
| %% |
| |
| int main(int argc, char** argv); |
| |
| int |
| main ( int argc, char** argv ) |
| { |
| FILE * fp; |
| if( argc != 2 ) { |
| fprintf(stderr,"*** Error: Must specify one filename.\n"); |
| exit(-1); |
| } |
| if((fp=fopen(argv[1],"r"))==NULL) { |
| fprintf(stderr,"*** Error: fopen(%s) failed.\n",argv[1]); |
| exit(-1); |
| } |
| yyin = fp; |
| yyout = stdout; |
| yylex(); |
| if (!error) |
| printf("TEST RETURNING OK.\n"); |
| else |
| exit(-1); |
| return 0; |
| } |