106 lines
3.8 KiB
C
106 lines
3.8 KiB
C
#ifndef LITTLE_ENDIAN_INCLUDED
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#define LITTLE_ENDIAN_INCLUDED
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/* Copyright (c) 2012, 2022, Oracle and/or its affiliates.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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Without limiting anything contained in the foregoing, this file,
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which is part of C Driver for MySQL (Connector/C), is also subject to the
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Universal FOSS Exception, version 1.0, a copy of which can be found at
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http://oss.oracle.com/licenses/universal-foss-exception.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/*
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Data in little-endian format.
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*/
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#include <string.h>
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static inline void float4get (float *V, const uchar *M)
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{
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memcpy(V, (M), sizeof(float));
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}
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static inline void float4store(uchar *V, float M)
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{
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memcpy(V, (&M), sizeof(float));
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}
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static inline void float8get (double *V, const uchar *M)
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{
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memcpy(V, M, sizeof(double));
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}
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static inline void float8store(uchar *V, double M)
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{
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memcpy(V, &M, sizeof(double));
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}
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static inline void floatget (float *V, const uchar *M) { float4get(V, M); }
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static inline void floatstore (uchar *V, float M) { float4store(V, M); }
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/* Bi-endian hardware.... */
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#if defined(__FLOAT_WORD_ORDER) && (__FLOAT_WORD_ORDER == __BIG_ENDIAN)
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static inline void doublestore(uchar *T, double V)
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{ *(((char*)T)+0)=(char) ((uchar *) &V)[4];
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*(((char*)T)+1)=(char) ((uchar *) &V)[5];
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*(((char*)T)+2)=(char) ((uchar *) &V)[6];
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*(((char*)T)+3)=(char) ((uchar *) &V)[7];
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*(((char*)T)+4)=(char) ((uchar *) &V)[0];
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*(((char*)T)+5)=(char) ((uchar *) &V)[1];
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*(((char*)T)+6)=(char) ((uchar *) &V)[2];
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*(((char*)T)+7)=(char) ((uchar *) &V)[3]; }
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static inline void doubleget(double *V, const uchar *M)
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{ double def_temp;
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((uchar*) &def_temp)[0]=(M)[4];
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((uchar*) &def_temp)[1]=(M)[5];
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((uchar*) &def_temp)[2]=(M)[6];
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((uchar*) &def_temp)[3]=(M)[7];
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((uchar*) &def_temp)[4]=(M)[0];
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((uchar*) &def_temp)[5]=(M)[1];
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((uchar*) &def_temp)[6]=(M)[2];
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((uchar*) &def_temp)[7]=(M)[3];
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(*V) = def_temp; }
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#else /* Bi-endian hardware.... */
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static inline void doublestore(uchar *T, double V) { memcpy(T, &V, sizeof(double)); }
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static inline void doubleget (double *V, const uchar *M) { memcpy(V, M, sizeof(double)); }
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#endif /* Bi-endian hardware.... */
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static inline void ushortget(uint16 *V, const uchar *pM) { *V= uint2korr(pM); }
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static inline void shortget (int16 *V, const uchar *pM) { *V= sint2korr(pM); }
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static inline void longget (int32 *V, const uchar *pM) { *V= sint4korr(pM); }
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static inline void ulongget (uint32 *V, const uchar *pM) { *V= uint4korr(pM); }
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static inline void shortstore(uchar *T, int16 V) { int2store(T, V); }
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static inline void longstore (uchar *T, int32 V) { int4store(T, V); }
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static inline void longlongget(longlong *V, const uchar *M)
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{
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memcpy(V, (M), sizeof(ulonglong));
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}
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static inline void longlongstore(uchar *T, longlong V)
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{
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memcpy((T), &V, sizeof(ulonglong));
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}
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#endif /* LITTLE_ENDIAN_INCLUDED */
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