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Merge pull request #4 from mikegarts/short.circuit.endian

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start making endianness switch less weird
This commit is contained in:
David Lamparter 2016-06-22 13:24:36 +02:00 • committed by GitHub
commit 0e850b18ff
1 changed files with 39 additions and 20 deletions
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59
lib/capnp_c.h
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@ -13,6 +13,7 @@
#include <stdint.h>
#include <stdio.h>
#include <endian.h>
#ifdef __cplusplus
extern "C" {
@ -299,30 +300,48 @@ CAPN_INLINE uint8_t capn_flip8(uint8_t v) {
return v;
}
CAPN_INLINE uint16_t capn_flip16(uint16_t v) {
union { uint16_t u; uint8_t v[2]; } s;
s.v[0] = (uint8_t)v;
s.v[1] = (uint8_t)(v>>8);
return s.u;
#if __BYTE_ORDER == __BIG_ENDIAN
union { uint16_t u; uint8_t v[2]; } s;
s.v[0] = (uint8_t)v;
s.v[1] = (uint8_t)(v>>8);
return s.u;
#elif __BYTE_ORDER == __LITTLE_ENDIAN
return v;
#else
#error "Unable to determine endianess ";
#endif
}
CAPN_INLINE uint32_t capn_flip32(uint32_t v) {
union { uint32_t u; uint8_t v[4]; } s;
s.v[0] = (uint8_t)v;
s.v[1] = (uint8_t)(v>>8);
s.v[2] = (uint8_t)(v>>16);
s.v[3] = (uint8_t)(v>>24);
return s.u;
#if __BYTE_ORDER == __BIG_ENDIAN
union { uint32_t u; uint8_t v[4]; } s;
s.v[0] = (uint8_t)v;
s.v[1] = (uint8_t)(v>>8);
s.v[2] = (uint8_t)(v>>16);
s.v[3] = (uint8_t)(v>>24);
return s.u;
#elif __BYTE_ORDER == __LITTLE_ENDIAN
return v;
#else
#error "Unable to determine endianess ";
#endif
}
CAPN_INLINE uint64_t capn_flip64(uint64_t v) {
union { uint64_t u; uint8_t v[8]; } s;
s.v[0] = (uint8_t)v;
s.v[1] = (uint8_t)(v>>8);
s.v[2] = (uint8_t)(v>>16);
s.v[3] = (uint8_t)(v>>24);
s.v[4] = (uint8_t)(v>>32);
s.v[5] = (uint8_t)(v>>40);
s.v[6] = (uint8_t)(v>>48);
s.v[7] = (uint8_t)(v>>56);
return s.u;
#if __BYTE_ORDER == __BIG_ENDIAN
union { uint64_t u; uint8_t v[8]; } s;
s.v[0] = (uint8_t)v;
s.v[1] = (uint8_t)(v>>8);
s.v[2] = (uint8_t)(v>>16);
s.v[3] = (uint8_t)(v>>24);
s.v[4] = (uint8_t)(v>>32);
s.v[5] = (uint8_t)(v>>40);
s.v[6] = (uint8_t)(v>>48);
s.v[7] = (uint8_t)(v>>56);
return s.u;
#elif __BYTE_ORDER == __LITTLE_ENDIAN
return v;
#else
#error "Unable to determine endianess ";
#endif
}
CAPN_INLINE int capn_write1(capn_ptr p, int off, int val) {