include_by_push.direct.l revision 1.1.1.1
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 34%option 8bit prefix="test" 35%option nounput nomain noyywrap noinput 36%option warn 37 38%x GET_FILENAME 39 40%% 41 42<INITIAL>{ 43^"#include"[[:blank:]]+"<" { BEGIN(GET_FILENAME); } 44.|\n { ECHO; } 45} 46 47<GET_FILENAME>{ 48[[:alnum:]_.-]+> { 49 /* recurse */ 50 yytext[yyleng-1]='\0'; 51 if((yyin=fopen(yytext,"r"))==NULL) { 52 fprintf(stderr,"*** Error: Could not open include file \"%s\".\n",yytext); 53 yyterminate(); 54 } 55 yypush_buffer_state( yy_create_buffer( yyin, YY_BUF_SIZE )); 56 BEGIN(0); 57 } 58.|\n { 59 fprintf(stderr,"Invalid input \"%s\".\n", yytext); 60 yyterminate(); 61 } 62} 63 64<<EOF>> { 65 fclose(yyin); 66 yypop_buffer_state(); 67 if(!YY_CURRENT_BUFFER) 68 yyterminate(); 69 } 70 71%% 72 73int main(int argc, char** argv); 74 75int 76main ( int argc, char** argv ) 77{ 78 FILE * fp; 79 if( argc != 2 ) { 80 fprintf(stderr,"*** Error: Must specify one filename.\n"); 81 exit(-1); 82 } 83 if((fp=fopen(argv[1],"r"))==NULL) { 84 fprintf(stderr,"*** Error: fopen(%s) failed.\n",argv[1]); 85 exit(-1); 86 } 87 yyin = fp; 88 yyout = stdout; 89 yylex(); 90 printf("TEST RETURNING OK.\n"); 91 return 0; 92} 93