Re: convert regex.c, strftime.c mktime.c to standard C

[Bruno Haible]

Richard Stallman asked:
> regexp.c might be harder.  Would Emacs work with the current
> regex.c from gnulib, or does it lack some features added for Emacs?

Emacs appears to rely on an efficient re_search_2 and re_match_2 function.
Whereas the implementation of re_search_2 and re_match_2 in glibc and gnulib
concatenates the two given strings in a single malloc'ed area, performs the
search, and then frees the malloc'ed area. Depending on the typical sizes of
strings that are passed to re_search_2 and re_match_2, this may or may not
be a performance killer.

Bruno