MySQL 5.6.14 Source Code Document
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big_endian.h
1 /* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
2 
3  This program is free software; you can redistribute it and/or modify
4  it under the terms of the GNU General Public License as published by
5  the Free Software Foundation; version 2 of the License.
6 
7  This program is distributed in the hope that it will be useful,
8  but WITHOUT ANY WARRANTY; without even the implied warranty of
9  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  GNU General Public License for more details.
11 
12  You should have received a copy of the GNU General Public License
13  along with this program; if not, write to the Free Software
14  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
15 
16 /*
17  Data in big-endian format.
18 */
19 #define float4store(T,A) do { *(T)= ((uchar *) &A)[3];\
20  *((T)+1)=(char) ((uchar *) &A)[2];\
21  *((T)+2)=(char) ((uchar *) &A)[1];\
22  *((T)+3)=(char) ((uchar *) &A)[0]; } while(0)
23 
24 #define float4get(V,M) do { float def_temp;\
25  ((uchar*) &def_temp)[0]=(M)[3];\
26  ((uchar*) &def_temp)[1]=(M)[2];\
27  ((uchar*) &def_temp)[2]=(M)[1];\
28  ((uchar*) &def_temp)[3]=(M)[0];\
29  (V)=def_temp; } while(0)
30 
31 #define float8store(T,V) do { *(T)= ((uchar *) &V)[7];\
32  *((T)+1)=(char) ((uchar *) &V)[6];\
33  *((T)+2)=(char) ((uchar *) &V)[5];\
34  *((T)+3)=(char) ((uchar *) &V)[4];\
35  *((T)+4)=(char) ((uchar *) &V)[3];\
36  *((T)+5)=(char) ((uchar *) &V)[2];\
37  *((T)+6)=(char) ((uchar *) &V)[1];\
38  *((T)+7)=(char) ((uchar *) &V)[0]; } while(0)
39 
40 #define float8get(V,M) do { double def_temp;\
41  ((uchar*) &def_temp)[0]=(M)[7];\
42  ((uchar*) &def_temp)[1]=(M)[6];\
43  ((uchar*) &def_temp)[2]=(M)[5];\
44  ((uchar*) &def_temp)[3]=(M)[4];\
45  ((uchar*) &def_temp)[4]=(M)[3];\
46  ((uchar*) &def_temp)[5]=(M)[2];\
47  ((uchar*) &def_temp)[6]=(M)[1];\
48  ((uchar*) &def_temp)[7]=(M)[0];\
49  (V) = def_temp; } while(0)
50 
51 #define ushortget(V,M) do { V = (uint16) (((uint16) ((uchar) (M)[1]))+\
52  ((uint16) ((uint16) (M)[0]) << 8)); } while(0)
53 #define shortget(V,M) do { V = (short) (((short) ((uchar) (M)[1]))+\
54  ((short) ((short) (M)[0]) << 8)); } while(0)
55 #define longget(V,M) do { int32 def_temp;\
56  ((uchar*) &def_temp)[0]=(M)[0];\
57  ((uchar*) &def_temp)[1]=(M)[1];\
58  ((uchar*) &def_temp)[2]=(M)[2];\
59  ((uchar*) &def_temp)[3]=(M)[3];\
60  (V)=def_temp; } while(0)
61 #define ulongget(V,M) do { uint32 def_temp;\
62  ((uchar*) &def_temp)[0]=(M)[0];\
63  ((uchar*) &def_temp)[1]=(M)[1];\
64  ((uchar*) &def_temp)[2]=(M)[2];\
65  ((uchar*) &def_temp)[3]=(M)[3];\
66  (V)=def_temp; } while(0)
67 #define shortstore(T,A) do { uint def_temp=(uint) (A) ;\
68  *(((char*)T)+1)=(char)(def_temp); \
69  *(((char*)T)+0)=(char)(def_temp >> 8); } while(0)
70 #define longstore(T,A) do { *(((char*)T)+3)=((A));\
71  *(((char*)T)+2)=(((A) >> 8));\
72  *(((char*)T)+1)=(((A) >> 16));\
73  *(((char*)T)+0)=(((A) >> 24)); } while(0)
74 
75 #define floatget(V,M) memcpy(&V, (M), sizeof(float))
76 /* Cast away type qualifiers (necessary as macro takes argument by value). */
77 #define floatstore(T,V) memcpy((T), (void*) (&V), sizeof(float))
78 #define doubleget(V,M) memcpy(&V, (M), sizeof(double))
79 /* Cast away type qualifiers (necessary as macro takes argument by value). */
80 #define doublestore(T,V) memcpy((T), (void*) &V, sizeof(double))
81 #define longlongget(V,M) memcpy(&V, (M), sizeof(ulonglong))
82 #define longlongstore(T,V) memcpy((T), &V, sizeof(ulonglong))