Re: [PATCH 0/7] Update the compat/regex engine from upstream

[Junio C Hamano <gitster@pobox.com>]

Ævar Arnfjörð Bjarmason  <avarab@gmail.com> writes:

> See the first patch for motivation & why.
> ...

I do not necessarily agree with the upgrading strategy outlined in
1/7, but that is a separate issue.  There may be some other bits
that needs resurrecting out of "git log -p master compat/regex/",
but I cannot test them myself (the part changed by the following
patch have no effect in an environment where long is intptr_t, so
"make NO_REGEX=YesPlease" build does not fail for me), so I'm
letting Dscho's Windows builder find it out via Travis.

-- >8 --
Date: Fri, 12 May 2017 09:00:07 +0900
Subject: [PATCH] compat/regex: make it compile with -Werror=int-to-pointer-cast

The change by 56a1a3ab ("Silence GCC's "cast of pointer to integer
of a different size" warning", 2015-10-26) may need resurrecting; I
do not think an unprotected #include <stdint.h> is the best way to
do this, but for the purpose of places that needs further work,
thishsould do.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 compat/regex/regcomp.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/compat/regex/regcomp.c b/compat/regex/regcomp.c
index 5e9ea26cd4..5688a639bf 100644
--- a/compat/regex/regcomp.c
+++ b/compat/regex/regcomp.c
@@ -24,9 +24,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifdef HAVE_STDINT_H
 #include <stdint.h>
-#endif
 
 #ifdef HAVE_STRINGS_H
 #include <strings.h>
@@ -2641,7 +2639,7 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
     old_tree = NULL;
 
   if (elem->token.type == SUBEXP)
-    postorder (elem, mark_opt_subexp, (void *) (long) elem->token.opr.idx);
+    postorder (elem, mark_opt_subexp, (void *) (intptr_t) elem->token.opr.idx);
 
   tree = create_tree (dfa, elem, NULL, (end == -1 ? OP_DUP_ASTERISK : OP_ALT));
   if (BE (tree == NULL, 0))
@@ -3868,7 +3866,7 @@ create_token_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right,
 static reg_errcode_t
 mark_opt_subexp (void *extra, bin_tree_t *node)
 {
-  int idx = (int) (long) extra;
+  int idx = (int) (intptr_t) extra;
   if (node->token.type == SUBEXP && node->token.opr.idx == idx)
     node->token.opt_subexp = 1;
 
-- 
2.13.0-334-gbb1c091dbc