[PATCH v2 1/5] util: introduce little_endian

[Chen Jingpiao]

* defs.h (little_endian): New prototype.
* util.c (little_endian): New function.
(next_set_bit): Use it.
---
 defs.h |  2 ++
 util.c | 12 ++++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/defs.h b/defs.h
index b4170af48..c25cdb5e4 100644
--- a/defs.h
+++ b/defs.h
@@ -514,6 +514,8 @@ const struct xlat *genl_families_xlat(struct tcb *tcp);
 extern unsigned long get_pagesize(void);
 extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits);
 
+extern bool little_endian(void);
+
 /*
  * Returns STR if it does not start with PREFIX,
  * or a pointer to the first char in STR after PREFIX.
diff --git a/util.c b/util.c
index 38458658b..db7591f19 100644
--- a/util.c
+++ b/util.c
@@ -118,6 +118,13 @@ stpcpy(char *dst, const char *src)
 }
 #endif
 
+bool
+little_endian(void)
+{
+	const unsigned endian = 1;
+	return *(char *) (void *) &endian;
+}
+
 /* Find a next bit which is set.
  * Starts testing at cur_bit.
  * Returns -1 if no more bits are set.
@@ -131,12 +138,9 @@ stpcpy(char *dst, const char *src)
 int
 next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits)
 {
-	const unsigned endian = 1;
-	int little_endian = *(char *) (void *) &endian;
-
 	const uint8_t *array = bit_array;
 	unsigned pos = cur_bit / 8;
-	unsigned pos_xor_mask = little_endian ? 0 : current_wordsize-1;
+	unsigned pos_xor_mask = little_endian() ? 0 : current_wordsize-1;
 
 	for (;;) {
 		uint8_t bitmask;
-- 
2.16.2.347.gba1b3b449.dirty