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Avoid aliasing problems by using special buf endian handling functions wrapping memcpy

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Francisco Blas (klondike) Izquierdo Riera 2014-12-29 23:04:02 +01:00
parent 4d640dac2a
commit 1636187e26
13 changed files with 68 additions and 40 deletions
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25
I2PEndian.h
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@ -1,5 +1,7 @@
#ifndef I2PENDIAN_H__
#define I2PENDIAN_H__
#include <inttypes.h>
#include <cstring>
#if defined(__linux__) || defined(__FreeBSD_kernel__)
#include <endian.h>
@ -25,6 +27,7 @@
#define le64toh(x) OSSwapLittleToHostInt64(x)
#else
#define NEEDS_LOCAL_ENDIAN
#include <cstdint>
uint16_t htobe16(uint16_t int16);
uint32_t htobe32(uint32_t int32);
@ -44,5 +47,27 @@ uint64_t be64toh(uint64_t big64);
#endif
inline uint16_t bufbe16toh(const uint8_t *buf)
{
uint16_t big16;
memcpy(&big16, buf, sizeof(uint16_t));
return be16toh(big16);
}
inline uint32_t bufbe32toh(const uint8_t *buf)
{
uint32_t big32;
memcpy(&big32, buf, sizeof(uint32_t));
return be32toh(big32);
}
inline uint64_t bufbe64toh(const uint8_t *buf)
{
uint64_t big64;
memcpy(&big64, buf, sizeof(uint64_t));
return be64toh(big64);
}
#endif // I2PENDIAN_H__