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+/*
+ * 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.
+ */
+
+/*
+ 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);
+extern int testget_lineno(void);
+
+
+/* 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 {
+ int lineno;
+ char * str;
+}
+%token <str> IDENT
+%token <lineno> LINENO
+%token EQUAL "="
+%token COLON ":"
+%token SPACE " "
+%%
+
+file:
+ line
+ | file line
+ ;
+
+line:
+ LINENO COLON SPACE IDENT EQUAL IDENT
+ {
+ process_text($4);
+ process_text($6);
+ /* Check lineno. */
+ if( $1 != @1.first_line || $1 != testget_lineno())
+ {
+ yyerror("Parse failed: Line numbers do not match.");
+ YYABORT;
+ }
+
+ /* Recreate the line to stdout. */
+ printf ( "%04d: %s=%s\n", @1.first_line, $4, $6);
+ }
+ ;
+
+%%
+
+int yyerror(char* msg) {
+ fprintf(stderr,"%s\n",msg);
+ return 0;
+}
+