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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_OS_KV_H
#define CEPH_OS_KV_H
#include <string>
#include "include/byteorder.h"
// some key encoding helpers
template<typename T>
inline static void _key_encode_u32(uint32_t u, T *key) {
uint32_t bu;
#ifdef CEPH_BIG_ENDIAN
bu = u;
#elif defined(CEPH_LITTLE_ENDIAN)
bu = swab(u);
#else
# error wtf
#endif
key->append((char*)&bu, 4);
}
template<typename T>
inline static void _key_encode_u32(uint32_t u, size_t pos, T *key) {
uint32_t bu;
#ifdef CEPH_BIG_ENDIAN
bu = u;
#elif defined(CEPH_LITTLE_ENDIAN)
bu = swab(u);
#else
# error wtf
#endif
key->replace(pos, sizeof(bu), (char*)&bu, sizeof(bu));
}
inline static const char *_key_decode_u32(const char *key, uint32_t *pu) {
uint32_t bu;
memcpy(&bu, key, 4);
#ifdef CEPH_BIG_ENDIAN
*pu = bu;
#elif defined(CEPH_LITTLE_ENDIAN)
*pu = swab(bu);
#else
# error wtf
#endif
return key + 4;
}
template<typename T>
inline static void _key_encode_u64(uint64_t u, T *key) {
uint64_t bu;
#ifdef CEPH_BIG_ENDIAN
bu = u;
#elif defined(CEPH_LITTLE_ENDIAN)
bu = swab(u);
#else
# error wtf
#endif
key->append((char*)&bu, 8);
}
inline static const char *_key_decode_u64(const char *key, uint64_t *pu) {
uint64_t bu;
memcpy(&bu, key, 8);
#ifdef CEPH_BIG_ENDIAN
*pu = bu;
#elif defined(CEPH_LITTLE_ENDIAN)
*pu = swab(bu);
#else
# error wtf
#endif
return key + 8;
}
#endif
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