Re: [Tinycc-devel] Get a token from char *

[grischka]

Thomas Preud'homme wrote:
> Hello all,
>
> Is there a function to get the token from a supplied string, something whose 
> prototype would be: int get_tok_from_str(char *str)?
> I made an improvement of my commit about assembly function label (commit 
> 9b09fc3) but when I wanted to push it a conflict made me realize another 
> attempt has been made which handle more pattern but just ignore label for the 
> moment (cf commit 264a1036). This commit parse the asm label as 2 distincts 
> string: one user defined and one "API". So I'd need to create a token for the 
> concatenation in order to merge both code and do the redirection. 

This might be a misunderstanding.  String concatenation is nothing
special with asm labels.  It is part of the normal C parsing rules:
    puts("1" "2" "3");
Accordingly
   int bar() asm ("foo_" "bar" "_9");
is eqivalent to
   int bar() asm ("foo_bar_9");

parse_asm_str already does that.

However I'm not sure that converting the asm label into a C token is
the right thing.  For example, tcc already can use "__bound_malloc"
instead of "malloc",  where "malloc" is the C token and "__bound_malloc"
is the elf-symbol name.

Btw. gnu asm labels can be used not only with functions but with data
as well:  http://gcc.gnu.org/onlinedocs/gcc-4.5.2/gcc/Asm-Labels.html

--- grischka

> I looked at 
> tccpp.c but no function is used to get a token, it's done inside a rather big 
> function. Would it make sense to create a function for this? If so, I don't 
> feel confortable to do it myself, could someone who knows this code well do it 
> if it doesn't take too much time?
>
> Best regards,
>
> Thomas