Rather manually specifying the size of the integer to be converted, key off of the type size. Reduces duplicate size info and the occurance of certain types of bugs (using the wrong sized conversion).
CC: Sukadev Bhattiprolu <suka...@linux.vnet.ibm.com> Signed-off-by: Cody P Schafer <d...@codyps.com> --- include/linux/byteorder.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 include/linux/byteorder.h diff --git a/include/linux/byteorder.h b/include/linux/byteorder.h new file mode 100644 index 0000000..c7ab8da --- /dev/null +++ b/include/linux/byteorder.h @@ -0,0 +1,34 @@ +#ifndef LINUX_BYTEORDER_H_ +#define LINUX_BYTEORDER_H_ + +#include <asm/byteorder.h> + +#define be_to_cpu(v) \ + __builtin_choose_expr(sizeof(v) == sizeof(uint8_t) , v, \ + __builtin_choose_expr(sizeof(v) == sizeof(uint16_t), be16_to_cpu(v), \ + __builtin_choose_expr(sizeof(v) == sizeof(uint32_t), be32_to_cpu(v), \ + __builtin_choose_expr(sizeof(v) == sizeof(uint64_t), be64_to_cpu(v), \ + (void)0)))) + +#define le_to_cpu(v) \ + __builtin_choose_expr(sizeof(v) == sizeof(uint8_t) , v, \ + __builtin_choose_expr(sizeof(v) == sizeof(uint16_t), le16_to_cpu(v), \ + __builtin_choose_expr(sizeof(v) == sizeof(uint32_t), le32_to_cpu(v), \ + __builtin_choose_expr(sizeof(v) == sizeof(uint64_t), le64_to_cpu(v), \ + (void)0)))) + +#define cpu_to_le(v) \ + __builtin_choose_expr(sizeof(v) == sizeof(uint8_t) , v, \ + __builtin_choose_expr(sizeof(v) == sizeof(uint16_t), cpu_to_le16(v), \ + __builtin_choose_expr(sizeof(v) == sizeof(uint32_t), cpu_to_le32(v), \ + __builtin_choose_expr(sizeof(v) == sizeof(uint64_t), cpu_to_le64(v), \ + (void)0)))) + +#define cpu_to_be(v) \ + __builtin_choose_expr(sizeof(v) == sizeof(uint8_t) , v, \ + __builtin_choose_expr(sizeof(v) == sizeof(uint16_t), cpu_to_be16(v), \ + __builtin_choose_expr(sizeof(v) == sizeof(uint32_t), cpu_to_be32(v), \ + __builtin_choose_expr(sizeof(v) == sizeof(uint64_t), cpu_to_be64(v), \ + (void)0)))) + +#endif -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
