Silence GCC's "cast of pointer to integer of a different size" warning

When calculating hashes from pointers, it actually makes sense to cut
off the most significant bits. In that case, said warning does not make
a whole lot of sense.

So let's just work around it by casting the pointer first to intptr_t
and then casting up/down to the final integral type.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/compat/regex/regcomp.c b/compat/regex/regcomp.c
index 06f30887080bc293994ed470ff9b313ae048dcfb..fba5986399ed20174d37c39bf6d243bcbfddd3a7 100644 (file)
--- a/compat/regex/regcomp.c
+++ b/compat/regex/regcomp.c
@@ -18,6 +18,8 @@
    Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
    02110-1301 USA.  */
 
+#include <stdint.h>
+
 static reg_errcode_t re_compile_internal (regex_t *preg, const char * pattern,
                                          size_t length, reg_syntax_t syntax);
 static void re_compile_fastmap_iter (regex_t *bufp,
@@ -2577,7 +2579,7 @@ 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))
@@ -3806,7 +3808,7 @@ 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;
 

diff --git a/pack-revindex.c b/pack-revindex.c
index 5c8376e9789301b921188e3bf19fba85960a7967..e542ea7703a740916f8d2cac9176674782d37f61 100644 (file)
--- a/pack-revindex.c
+++ b/pack-revindex.c
@@ -21,7 +21,7 @@ static int pack_revindex_hashsz;
 
 static int pack_revindex_ix(struct packed_git *p)
 {
-       unsigned long ui = (unsigned long)p;
+       unsigned long ui = (unsigned long)(intptr_t)p;
        int i;
 
        ui = ui ^ (ui >> 16); /* defeat structure alignment */

diff --git a/sha1_file.c b/sha1_file.c
index b231b627846e4f213dca4e1db704fd7852fa3172..2350a91dbe5dc9e895e3e688e546ff83307ad6dc 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2014,7 +2014,7 @@ static unsigned long pack_entry_hash(struct packed_git *p, off_t base_offset)
 {
        unsigned long hash;
 
-       hash = (unsigned long)p + (unsigned long)base_offset;
+       hash = (unsigned long)(intptr_t)p + (unsigned long)base_offset;
        hash += (hash >> 8) + (hash >> 16);
        return hash % MAX_DELTA_CACHE;
 }