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