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utils: make le16 endian conversion functions work with arguments that have side effects

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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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Felix Fietkau 2013-02-14 23:39:57 +01:00
parent fcd5ba8fbd
commit bd47d85d38
1 changed files with 1 additions and 1 deletions
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utils.h
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@ -99,7 +99,7 @@ void clock_gettime(int type, struct timespec *tv);
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#endif
#define __u_bswap16(x) ((uint16_t)((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)))
#define __u_bswap16(x) ({ uint16_t val = (x); ((uint16_t)(((val >> 8) & 0xffu) | ((val & 0xffu) << 8))); })
#if _GNUC_MIN_VER(4, 2)
#define __u_bswap32(x) __builtin_bswap32(x)