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|
/*======================================================================
* Bison Options
*/
%pure_parser
%{
/*======================================================================
* Bison C Header
*/
#include <gfsmRegexCompiler.h>
#include <gfsmAutomatonIO.h>
#include "compretest.tab.h"
#include "compretest.lex.h"
#define my_compiler ((gfsmRegexCompiler*)reparser)
#define YYLEX_PARAM ((gfsmRegexCompiler*)reparser)->scanner.yyscanner
#define YYPARSE_PARAM reparser
#define YYERROR_VERBOSE 1
#define compretest_yyerror(msg) \
gfsm_scanner_carp((gfsmScanner*)reparser, (msg));
%}
/*======================================================================
* Bison Definitions
*/
%union {
gfsmAutomaton *fsm; //-- automaton
GString *gs; //-- needs to be freed by hand
gchar c;
guint32 u;
gfsmWeight w;
}
%token <c> TOK_UNKNOWN TOK_CHAR
%token <u> TOK_UINT
%token <gs> TOK_STRING
%token <w> TOK_WEIGHT
%type <u> label
%type <w> weight
%type <fsm> regex
/*
empty { $$=gfsm_regex_automaton_epsilon(my_compiler); }
*/
/*
| gfsmRETChar %prec LAB
{ $$=gfsm_regex_automaton_lab(my_compiler, $1); }
*/
// -- Operator precedence and associativity
%left CONCAT
%left LABCONCAT
%left WEIGHT
%right '%' //-- non-AT&T: rmepsilon: % REGEX
%right '$' //-- non-AT&T: determinize: $ REGEX
%right '~' //-- non-AT&T: connect: ~ REGEX
%left '*' '+' '?' '^'
%right '!'
%left '@'
%left ':'
%left '-'
%left '&'
%left '|'
/*======================================================================
* Bison Rules
*/
%%
regex: '('regex ')'
{ $$=$2; }
| label
{ $$=gfsm_regex_compiler_label_fsm(my_compiler, $1); }
| label regex %prec LABCONCAT
{ $$=gfsm_regex_compiler_prepend_lab(my_compiler, $1, $2); }
| regex regex %prec CONCAT
{ $$=gfsm_regex_compiler_concat(my_compiler, $1, $2); }
| '%' regex
{ $$=gfsm_regex_compiler_rmepsilon(my_compiler, $2); /* non-ATT */ }
| '$' regex
{ $$=gfsm_regex_compiler_determinize(my_compiler, $2); /* non-ATT */ }
| '~' regex
{ $$=gfsm_regex_compiler_connect(my_compiler, $2); /* non-ATT */ }
| regex '*'
{ $$=gfsm_regex_compiler_closure(my_compiler,$1,FALSE); }
| regex '+'
{ $$=gfsm_regex_compiler_closure(my_compiler,$1,TRUE); }
| regex '^' TOK_UINT
{ $$=gfsm_regex_compiler_power(my_compiler,$1,$3); }
| regex '?'
{ $$=gfsm_regex_compiler_optional(my_compiler,$1); }
| '!' regex
{ $$=gfsm_regex_compiler_complement(my_compiler,$2); }
| regex '|' regex
{ $$=gfsm_regex_compiler_union(my_compiler,$1,$3); }
| regex '&' regex
{ $$=gfsm_regex_compiler_intersect(my_compiler,$1,$3); }
| regex ':' regex
{ $$=gfsm_regex_compiler_product(my_compiler,$1,$3); }
| regex '@' regex
{ $$=gfsm_regex_compiler_compose(my_compiler,$1,$3); }
| regex '-' regex
{ $$=gfsm_regex_compiler_difference(my_compiler,$1,$3); }
| regex weight %prec WEIGHT
{ $$=gfsm_regex_compiler_weight(my_compiler,$1,$2); }
;
label: TOK_CHAR
{ $$=gfsm_regex_compiler_char2label(my_compiler, $1); }
| TOK_STRING
{ $$=gfsm_regex_compiler_gstring2label(my_compiler, $1); }
| '[' TOK_STRING ']'
{ $$=gfsm_regex_compiler_gstring2label(my_compiler, $2); }
;
weight: '<' TOK_WEIGHT '>' { $$=$2; }
;
%%
/*======================================================================
* User C Code
*/
int main (int argc, char **argv) {
gfsmRegexCompiler *reparser = g_new0(gfsmRegexCompiler,1);
gfsm_scanner_init((gfsmScanner*)reparser, "gfsmRegexCompiler", compretest_yy);
//-- initialization
reparser->srtype = gfsmSRTTropical;
reparser->gstr = g_string_new("");
reparser->abet = gfsm_string_alphabet_new();
if (!gfsm_alphabet_load_filename(reparser->abet, "test.lab", &(reparser->scanner.err))) {
g_printerr("%s: load failed for labels file '%s': %s\n",
*argv, "test.lab", (reparser->scanner.err ? reparser->scanner.err->message : "?"));
exit(2);
}
//-- debug: lexer
reparser->scanner.emit_warnings = TRUE;
//-- parse
compretest_yyparse(reparser);
//-- sanity check
if (reparser->scanner.err) {
fprintf(stderr, "%s: %s\n", *argv, reparser->scanner.err->message);
}
if (reparser->fsm) {
gfsm_automaton_save_bin_file(reparser->fsm, stdout, NULL);
} else {
fprintf(stderr, "%s: Error: no fsm!\n", *argv);
}
gfsm_scanner_free((gfsmScanner*)reparser);
return 0;
}
|
