85 lines
2 KiB
Text
85 lines
2 KiB
Text
|
/* $NetBSD: parser.y,v 1.1.1.1 2009/10/26 00:29:16 christos Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Accepts html-like input.
|
||
|
|
How to compile:
|
||
|
|
bison --defines --output-file="parser.c" --name-prefix="test" parser.y
|
||
|
|
*/
|
||
|
|
%{
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include "config.h"
|
||
|
|
|
||
|
|
#define YYERROR_VERBOSE 1
|
||
|
|
#define YYPARSE_PARAM scanner
|
||
|
|
#define YYLEX_PARAM scanner
|
||
|
|
|
||
|
|
int yyerror(char* msg);
|
||
|
|
|
||
|
|
|
||
|
|
/* A dummy function. A check against seg-faults in yylval->str. */
|
||
|
|
int process_text(char* s) {
|
||
|
|
int total =0;
|
||
|
|
while(*s) {
|
||
|
|
total += (int) *s;
|
||
|
|
++s;
|
||
|
|
}
|
||
|
|
return total;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
%}
|
||
|
|
|
||
|
|
%pure_parser
|
||
|
|
|
||
|
|
%union {
|
||
|
|
long unused;
|
||
|
|
char * str;
|
||
|
|
}
|
||
|
|
|
||
|
|
%token <str> TAGNAME TEXT
|
||
|
|
%token LT
|
||
|
|
%token GT
|
||
|
|
%token LTSLASH "</"
|
||
|
|
|
||
|
|
%%
|
||
|
|
|
||
|
|
html:
|
||
|
|
TEXT { process_text($1); free($1);}
|
||
|
|
| starttag html endtag
|
||
|
|
| html TEXT { process_text($2); free($2);}
|
||
|
|
| html starttag html endtag
|
||
|
|
;
|
||
|
|
|
||
|
|
starttag: LT TAGNAME GT { process_text($2); free($2);} ;
|
||
|
|
endtag: LTSLASH TAGNAME GT { process_text($2);free($2);} ;
|
||
|
|
%%
|
||
|
|
|
||
|
|
int yyerror(char* msg) {
|
||
|
|
fprintf(stderr,"%s\n",msg);
|
||
|
|
return 0;
|
||
|
|
}
|