Re: io:lines() and \0

[Tom N Harris <telliamed@...>]

On Friday, February 21, 2014 09:20:35 AM René Rebe wrote:
> There is no corner case left. At EOF without EOL the string is 0 terminated.
> My last patch checks for if the stream reached EOF and removes the
> superfluous \0\n.

I realised after I sent the mail that it was less hairy than I had assumed. 
But the way to do it is much simpler than your patch. Just use memrchr instead 
of memchr to find the terminating NULL. The read_line function then becomes:

## SNIP ##
    memset(p, '\n', LUAL_BUFFERSIZE);  /* could be any non-NULL character */
    if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) {  /* eof? */
      luaL_pushresult(&b);  /* close buffer */
      return (lua_rawlen(L, -1) > 0);  /* check whether read something */
    }
    l = (char*)memrchr(p, '\0', LUAL_BUFFERSIZE) - p;
## SNIP ##

1 insertion and 1 changed line. Though I get a warning that I think must be a 
bug in GCC. (It's trying to tell me memrchr returns an int.)

On Friday, February 21, 2014 10:48:00 AM Dirk Laurie wrote:
> 2. Anybody, even the OP, thinking that the Lua developers
> will do this?

I don't recall anyone from PUC-Rio saying they *wouldn't* make the change.

-- 
tom <telliamed@whoopdedo.org>