98 lines
2.2 KiB
Text
98 lines
2.2 KiB
Text
/* $NetBSD: parser.y,v 1.1.1.1 2009/10/26 00:29:16 christos Exp $ */
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/*
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* This file is part of flex.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE.
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*/
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/*
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How to compile:
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bison --defines --output-file="parser.c" --name-prefix="test" parser.y
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*/
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%{
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "config.h"
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#define YYERROR_VERBOSE 1
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#define YYPARSE_PARAM scanner
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#define YYLEX_PARAM scanner
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int yyerror(char* msg);
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extern int testget_lineno(void*);
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/* A dummy function. A check against seg-faults in yylval->str. */
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int process_text(char* s) {
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int total =0;
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while(*s) {
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total += (int) *s;
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++s;
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}
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return total;
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}
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%}
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%pure_parser
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%union {
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int lineno;
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char * str;
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}
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%token <str> IDENT
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%token <lineno> LINENO
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%token EQUAL "="
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%token COLON ":"
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%token SPACE " "
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%%
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file:
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line
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| file line
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;
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line:
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LINENO COLON SPACE IDENT EQUAL IDENT
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{
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process_text($4);
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process_text($6);
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/* Check lineno. */
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if( $1 != @1.first_line || $1 != testget_lineno(scanner))
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{
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yyerror("Parse failed: Line numbers do not match.");
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YYABORT;
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}
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/* Recreate the line to stdout. */
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printf ( "%04d: %s=%s\n", @1.first_line, $4, $6);
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}
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;
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%%
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int yyerror(char* msg) {
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fprintf(stderr,"%s\n",msg);
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return 0;
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}
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