RE: Problem with lstrlib.c

Ah yes. Good point.

On our embedded system I wrote stddef.h and didn’t quite get it right J

Thanks

Neil

From: lua-bounces@bazar2.conectiva.com.br [mailto:lua-bounces@bazar2.conectiva.com.br] On Behalf Of Paul Hudson
Sent: 22 February 2010 12:26
To: Lua list
Subject: Re: Problem with lstrlib.c

> On our system, ptrdiff_t is unsigned long.

Your system isn't ANSI C. I would expect this breaks quite a number of programs.

"When two pointers are subtracted, both shall point to elements of the same array object, or one past the last element of the array object; the result is the difference of the subscripts of the two array elements. The size of the result is implementation-defined, and its type (a signed integer type) is ptrdiff_t defined in the <stddef.h> header."

(Not got the standard in front of me, but it's quoted from here: http://stackoverflow.com/questions/1645669/char-a-b-what-type-is-b-a-and-how-do-i-printf-it)

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