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b2/: add syntax switch
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3fff9373e3
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@ -15,8 +15,7 @@
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#include <unistd.h>
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#include <fcntl.h>
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extern int yyparse(void);
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#include "lang.h"
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static void usage(const char *name)
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@ -47,6 +46,6 @@ int main(int argc, char **argv)
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default:
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usage(*argv);
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}
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(void) yyparse();
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parse_hierarchy();
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return 0;
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}
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19
b2/lang.h
Normal file
19
b2/lang.h
Normal file
@ -0,0 +1,19 @@
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/*
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* lang.h - Things lang.l and lang.y export
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*
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* Copyright 2012 by Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef LANG_H
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#define LANG_H
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void parse_hierarchy(void);
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void parse_characteristics(void);
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#endif /* !LANG_H */
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27
b2/lang.l
27
b2/lang.l
@ -17,14 +17,41 @@
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#include "param.h"
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#include "chr.h"
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#include "y.tab.h"
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#include "lang.h"
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extern int yyparse(void);
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static int start_token;
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static int lineno = 1;
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void parse_hierarchy(void)
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{
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start_token = START_HIERARCHY;
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yyparse();
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}
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void parse_characteristics(void)
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{
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start_token = START_CHAR;
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yyparse();
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}
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%}
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%%
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%{
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if (start_token) {
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int tmp = start_token;
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start_token = 0;
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return tmp;
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}
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%}
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[-_A-Za-z0-9()+./]+ { yylval.s = unique(yytext);
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return WORD; }
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@ -71,6 +71,7 @@ static const struct field *top_field(void)
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};
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%token START_HIERARCHY START_CHAR
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%token TOK_LE TOK_GE
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%token <s> WORD
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@ -86,11 +87,15 @@ static const struct field *top_field(void)
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%%
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all:
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rule
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START_HIERARCHY hierarchy
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;
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hierarchy:
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nameset hierarchy
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| rule
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{
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field_dump(stderr, $1);
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}
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| nameset all
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;
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nameset:
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