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/* platform_hacks.h */
/* Copyright 2009, 2010 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* all platform-specific ifdefs should go here */
#ifndef _PLATFORM_HACKS_H_
#define _PLATFORM_HACKS_H_
#ifdef __GNUC__
#define MONGO_INLINE static __inline__
#else
#define MONGO_INLINE static
#endif
#ifdef __cplusplus
#define MONGO_EXTERN_C_START extern "C" {
#define MONGO_EXTERN_C_END }
#else
#define MONGO_EXTERN_C_START
#define MONGO_EXTERN_C_END
#endif
#if defined(MONGO_HAVE_STDINT) || __STDC_VERSION__ >= 199901L
#include <stdint.h>
#elif defined(MONGO_HAVE_UNISTD)
#include <unistd.h>
#elif defined(MONGO_USE__INT64)
typedef __int64 int64_t;
#elif defined(MONGO_USE_LONG_LONG_INT)
typedef long long int int64_t;
#else
#error must have a 64bit int type
#endif
/* big endian is only used for OID generation. little is used everywhere else */
#ifdef MONGO_BIG_ENDIAN
#define bson_little_endian64(out, in) ( bson_swap_endian64(out, in) )
#define bson_little_endian32(out, in) ( bson_swap_endian32(out, in) )
#define bson_big_endian64(out, in) ( memcpy(out, in, 8) )
#define bson_big_endian32(out, in) ( memcpy(out, in, 4) )
#else
#define bson_little_endian64(out, in) ( memcpy(out, in, 8) )
#define bson_little_endian32(out, in) ( memcpy(out, in, 4) )
#define bson_big_endian64(out, in) ( bson_swap_endian64(out, in) )
#define bson_big_endian32(out, in) ( bson_swap_endian32(out, in) )
#endif
MONGO_EXTERN_C_START
MONGO_INLINE void bson_swap_endian64(void* outp, const void* inp){
const char *in = (const char*)inp;
char *out = (char*)outp;
out[0] = in[7];
out[1] = in[6];
out[2] = in[5];
out[3] = in[4];
out[4] = in[3];
out[5] = in[2];
out[6] = in[1];
out[7] = in[0];
}
MONGO_INLINE void bson_swap_endian32(void* outp, const void* inp){
const char *in = (const char*)inp;
char *out = (char*)outp;
out[0] = in[3];
out[1] = in[2];
out[2] = in[1];
out[3] = in[0];
}
MONGO_EXTERN_C_END
#endif