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DBHomework/mysql_include/byte_order_generic.h

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2017-11-19 14:58:43 +08:00
/* Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/*
Endianness-independent definitions for architectures other
than the x86 architecture.
*/
static inline int16 sint2korr(const uchar *A)
{
return
(int16) (((int16) (A[0])) +
((int16) (A[1]) << 8))
;
}
static inline int32 sint4korr(const uchar *A)
{
return
(int32) (((int32) (A[0])) +
(((int32) (A[1]) << 8)) +
(((int32) (A[2]) << 16)) +
(((int32) (A[3]) << 24)))
;
}
static inline uint16 uint2korr(const uchar *A)
{
return
(uint16) (((uint16) (A[0])) +
((uint16) (A[1]) << 8))
;
}
static inline uint32 uint4korr(const uchar *A)
{
return
(uint32) (((uint32) (A[0])) +
(((uint32) (A[1])) << 8) +
(((uint32) (A[2])) << 16) +
(((uint32) (A[3])) << 24))
;
}
static inline ulonglong uint8korr(const uchar *A)
{
return
((ulonglong)(((uint32) (A[0])) +
(((uint32) (A[1])) << 8) +
(((uint32) (A[2])) << 16) +
(((uint32) (A[3])) << 24)) +
(((ulonglong) (((uint32) (A[4])) +
(((uint32) (A[5])) << 8) +
(((uint32) (A[6])) << 16) +
(((uint32) (A[7])) << 24))) <<
32))
;
}
static inline longlong sint8korr(const uchar *A)
{
return (longlong) uint8korr(A);
}
static inline void int2store(uchar *T, uint16 A)
{
uint def_temp= A ;
*(T)= (uchar)(def_temp);
*(T+1)= (uchar)(def_temp >> 8);
}
static inline void int4store(uchar *T, uint32 A)
{
*(T)= (uchar) (A);
*(T+1)=(uchar) (A >> 8);
*(T+2)=(uchar) (A >> 16);
*(T+3)=(uchar) (A >> 24);
}
static inline void int8store(uchar *T, ulonglong A)
{
uint def_temp= (uint) A,
def_temp2= (uint) (A >> 32);
int4store(T, def_temp);
int4store(T+4,def_temp2);
}