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authorAnand Avati <avati@gluster.com>2011-07-01 16:54:29 +0000
committerAnand Avati <avati@gluster.com>2011-07-01 15:58:04 -0700
commit148217634cbd2c040734d60425955d3a3a381e12 (patch)
treedf7b17b498a312227f37862e42bf7cc9576d1be2 /libglusterfs
parented4ffc93e3cf982ae959a9ab3e025edf0f8de1c0 (diff)
byte-order: htole*/letoh* and htobe*/betoh* for forced endian conversions
Signed-off-by: Anand Avati <avati@gluster.com> BUG: 2815 (Server-enforced ACLs) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2815
Diffstat (limited to 'libglusterfs')
-rw-r--r--libglusterfs/src/byte-order.h172
1 files changed, 166 insertions, 6 deletions
diff --git a/libglusterfs/src/byte-order.h b/libglusterfs/src/byte-order.h
index cabfcf4..c74caa3 100644
--- a/libglusterfs/src/byte-order.h
+++ b/libglusterfs/src/byte-order.h
@@ -38,6 +38,23 @@ static uint64_t (*hton64) (uint64_t);
#define ntoh32 hton32
#define ntoh64 hton64
+static uint16_t (*htole16) (uint16_t);
+static uint32_t (*htole32) (uint32_t);
+static uint64_t (*htole64) (uint64_t);
+
+#define letoh16 htole16
+#define letoh32 htole32
+#define letoh64 htole64
+
+static uint16_t (*htobe16) (uint16_t);
+static uint32_t (*htobe32) (uint32_t);
+static uint64_t (*htobe64) (uint64_t);
+
+#define betoh16 htobe16
+#define betoh32 htobe32
+#define betoh64 htobe64
+
+
#define do_swap2(x) (((x&LS1) << 8)|(((x&MS1) >> 8)))
#define do_swap4(x) ((do_swap2(x&LS2) << 16)|(do_swap2((x&MS2) >> 16)))
#define do_swap8(x) ((do_swap4(x&LS4) << 32)|(do_swap4((x&MS4) >> 32)))
@@ -86,15 +103,17 @@ __noswap64 (uint64_t x)
static inline uint16_t
-__byte_order_init16 (uint16_t i)
+__byte_order_n16 (uint16_t i)
{
uint32_t num = 1;
if (((char *)(&num))[0] == 1) {
+ /* cpu is le */
hton16 = __swap16;
hton32 = __swap32;
hton64 = __swap64;
} else {
+ /* cpu is be */
hton16 = __noswap16;
hton32 = __noswap32;
hton64 = __noswap64;
@@ -105,15 +124,17 @@ __byte_order_init16 (uint16_t i)
static inline uint32_t
-__byte_order_init32 (uint32_t i)
+__byte_order_n32 (uint32_t i)
{
uint32_t num = 1;
if (((char *)(&num))[0] == 1) {
+ /* cpu is le */
hton16 = __swap16;
hton32 = __swap32;
hton64 = __swap64;
} else {
+ /* cpu is be */
hton16 = __noswap16;
hton32 = __noswap32;
hton64 = __noswap64;
@@ -124,15 +145,17 @@ __byte_order_init32 (uint32_t i)
static inline uint64_t
-__byte_order_init64 (uint64_t i)
+__byte_order_n64 (uint64_t i)
{
uint32_t num = 1;
if (((char *)(&num))[0] == 1) {
+ /* cpu is le */
hton16 = __swap16;
hton32 = __swap32;
hton64 = __swap64;
} else {
+ /* cpu is be */
hton16 = __noswap16;
hton32 = __noswap32;
hton64 = __noswap64;
@@ -142,9 +165,146 @@ __byte_order_init64 (uint64_t i)
}
-static uint16_t (*hton16) (uint16_t) = __byte_order_init16;
-static uint32_t (*hton32) (uint32_t) = __byte_order_init32;
-static uint64_t (*hton64) (uint64_t) = __byte_order_init64;
+static uint16_t (*hton16) (uint16_t) = __byte_order_n16;
+static uint32_t (*hton32) (uint32_t) = __byte_order_n32;
+static uint64_t (*hton64) (uint64_t) = __byte_order_n64;
+
+
+static inline uint16_t
+__byte_order_le16 (uint16_t i)
+{
+ uint32_t num = 1;
+
+ if (((char *)(&num))[0] == 1) {
+ /* cpu is le */
+ htole16 = __noswap16;
+ htole32 = __noswap32;
+ htole64 = __noswap64;
+ } else {
+ /* cpu is be */
+ htole16 = __swap16;
+ htole32 = __swap32;
+ htole64 = __swap64;
+ }
+
+ return htole16 (i);
+}
+
+
+static inline uint32_t
+__byte_order_le32 (uint32_t i)
+{
+ uint32_t num = 1;
+
+ if (((char *)(&num))[0] == 1) {
+ /* cpu is le */
+ htole16 = __noswap16;
+ htole32 = __noswap32;
+ htole64 = __noswap64;
+ } else {
+ /* cpu is be */
+ htole16 = __swap16;
+ htole32 = __swap32;
+ htole64 = __swap64;
+ }
+
+ return htole32 (i);
+}
+
+
+static inline uint64_t
+__byte_order_le64 (uint64_t i)
+{
+ uint32_t num = 1;
+
+ if (((char *)(&num))[0] == 1) {
+ /* cpu is le */
+ htole16 = __noswap16;
+ htole32 = __noswap32;
+ htole64 = __noswap64;
+ } else {
+ /* cpu is be */
+ htole16 = __swap16;
+ htole32 = __swap32;
+ htole64 = __swap64;
+ }
+
+ return htole64 (i);
+}
+
+
+static uint16_t (*htole16) (uint16_t) = __byte_order_le16;
+static uint32_t (*htole32) (uint32_t) = __byte_order_le32;
+static uint64_t (*htole64) (uint64_t) = __byte_order_le64;
+
+
+static inline uint16_t
+__byte_order_be16 (uint16_t i)
+{
+ uint32_t num = 1;
+
+ if (((char *)(&num))[0] == 1) {
+ /* cpu is le */
+ htobe16 = __swap16;
+ htobe32 = __swap32;
+ htobe64 = __swap64;
+ } else {
+ /* cpu is be */
+ htobe16 = __noswap16;
+ htobe32 = __noswap32;
+ htobe64 = __noswap64;
+ }
+
+ return htobe16 (i);
+}
+
+
+static inline uint32_t
+__byte_order_be32 (uint32_t i)
+{
+ uint32_t num = 1;
+
+ if (((char *)(&num))[0] == 1) {
+ /* cpu is le */
+ htobe16 = __swap16;
+ htobe32 = __swap32;
+ htobe64 = __swap64;
+ } else {
+ /* cpu is be */
+ htobe16 = __noswap16;
+ htobe32 = __noswap32;
+ htobe64 = __noswap64;
+ }
+
+ return htobe32 (i);
+}
+
+
+static inline uint64_t
+__byte_order_be64 (uint64_t i)
+{
+ uint32_t num = 1;
+
+ if (((char *)(&num))[0] == 1) {
+ /* cpu is le */
+ htobe16 = __swap16;
+ htobe32 = __swap32;
+ htobe64 = __swap64;
+ } else {
+ /* cpu is be */
+ htobe16 = __noswap16;
+ htobe32 = __noswap32;
+ htobe64 = __noswap64;
+ }
+
+ return htobe64 (i);
+}
+
+
+static uint16_t (*htobe16) (uint16_t) = __byte_order_be16;
+static uint32_t (*htobe32) (uint32_t) = __byte_order_be32;
+static uint64_t (*htobe64) (uint64_t) = __byte_order_be64;
+
#endif /* _BYTE_ORDER_H */