[ragel-users] another newbie question!!

[Adrian Thurston]

Hi,

This state machine is executed with the first argument string as input,
not the contents of the file named by the first argument. Ragel does not
open any files for you in case that's what you thought. You want to be
executing the program with

/ragel$ ./prog 'bar bar bar'

-Adrian

Sarkar wrote:
> i went thru the earlier post on tryin to run c++ programs using
> ragel..i tried it..
> 
> /ragel$ ragel -C prog.rl -o prog.rlo
> /ragel$ rlgen prog.rlo -l -o prog.cpp
> /ragel$ g++ prog.cpp -o prog
> /ragel$ ./prog input.txt
> 
> the program i ran was
> 
> #include <string.h>
> #include <stdio.h>
> 
> %%{
>     machine foo;
>     main := ('foo'|'bar') @{res = 1; };
> }%%
> 
> %% write data;
> 
> int main( int argc, char **argv )
> {
> 	int cs, res = 0;
> 	if ( argc > 0 ) {
> 		char *p = argv[1];
> 		char *pe = p + strlen(p) + 1;
> 		%% write init;
> 		%% write exec;
> 	}
> printf("result = %i\n", res );
> return 0;
> }
> 
> the input text file is gave was 'bar bar bar'
> 
> i expect the output should have been 'result = 1'
> but the output always came out as 'result = 0'
> when i initialised res=1 the output came out as 'result = 1'
> 
> could someone please help me understand what the program is all about
> and whether the output i got is valid and why??!
> 
> Cheers!
> 
> 
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