From: Rob Biedenharn <Rob@...>
Date: 2008-06-06T08:57:30+09:00
Subject: Re: RubyToC - Second Question

It looks like the preamble is missing.  The one in the rubyforge doc  
doesn't quite cut it since make doesn't find ruby.h (I'm sure a CFLAGS  
change would fix that).

Here's a minimal set of changes that makes for a clean compile:
+ Add the first 3 lines
* change the typecast on malloc to be str*
* change long to int for main (prototype and definition)

Perhaps you want to check out treetop or one of the other parsers as  
this project looks like it hasn't been touched in 2 years.

-Rob

#include <stdio.h>
#include <stdlib.h>
typedef char * str;

void arr_iterate();
int main();

void
arr_iterate() {
str * tstarr;
tstarr = (str *) malloc(sizeof(str) * 3);
tstarr[0] = "this is the first line";
tstarr[1] = "this is the second line";
tstarr[2] = "last line";
unsigned long index_line;
for (index_line = 0; tstarr[index_line] != NULL; ++index_line) {
str line = tstarr[index_line];
puts(line);
}
}

int
main() {
arr_iterate();
return 0;
}

On Jun 5, 2008, at 7:15 PM, Philip Rhoades wrote:

> People,
>
>
> truby2c.rb:
>
> #!/usr/bin/ruby
>
> require 'rubygems'
> require 'ruby_to_ansi_c'
>
> class MyTest
>  def arr_iterate
>    tstarr = [ 'this is the first line', 'this is the second line',  
> 'last line' ]
>
>    tstarr.each { |line|
>        puts line
>    }
>  end
>
>  def main
>    arr_iterate
>    return 0
>  end
> end
>
> result = RubyToAnsiC.translate_all_of MyTest
> puts result
>
>
> gives C output:
>
> void arr_iterate();
> long main();
>
> void
> arr_iterate() {
> str * tstarr;
> tstarr = (str) malloc(sizeof(str) * 3);
> tstarr[0] = "this is the first line";
> tstarr[1] = "this is the second line";
> tstarr[2] = "last line";
> unsigned long index_line;
> for (index_line = 0; tstarr[index_line] != NULL; ++index_line) {
> str line = tstarr[index_line];
> puts(line);
> }
> }
>
> long
> main() {
> arr_iterate();
> return 0;
> }
>
>
> compiling with gcc gives:
>
> truby2c.c: In function 'arr_iterate':
> truby2c.c:9: error: 'str' undeclared (first use in this function)
> truby2c.c:9: error: (Each undeclared identifier is reported only once
> truby2c.c:9: error: for each function it appears in.)
> truby2c.c:9: error: 'tstarr' undeclared (first use in this function)
> truby2c.c:10: error: expected ';' before 'malloc'
> truby2c.c:16: error: expected ';' before 'line'
> truby2c.c:17: error: 'line' undeclared (first use in this function)
> truby2c.c: In function 'main':
> truby2c.c:22: warning: return type of 'main' is not 'int'
>
>
> - seems like some fundamental problems with such a little program?
>
> Thanks,
>
> Phil.
> -- 
> Philip Rhoades
>
> Pricom Pty Limited  (ACN 003 252 275  ABN 91 003 252 275)
> GPO Box 3411
> Sydney NSW	2001
> Australia
> E-mail:  phil@pricom.com.au
>

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com