FreeTDS API
tdsbytes.h
1 /* FreeTDS - Library of routines accessing Sybase and Microsoft databases
2  * Copyright (C) 2005 Frediano Ziglio
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Library General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17  * Boston, MA 02111-1307, USA.
18  */
19 
20 #ifndef _tdsbytes_h_
21 #define _tdsbytes_h_
22 
23 /* $Id: tdsbytes.h,v 1.2 2005/08/10 12:06:03 freddy77 Exp $ */
24 
25 #ifndef _tds_h_
26 #error tds.h must be included before tdsbytes.h
27 #endif
28 
29 /*
30  * read a word of n bytes aligned, architecture dependent endian
31  * TDS_GET_An
32  * read a word of n bytes aligned, little endian
33  * TDS_GET_AnLE
34  * read a word of n bytes aligned, big endian
35  * TDS_GET_AnBE
36  * read a word of n bytes unaligned, architecture dependent endian
37  * TDS_GET_UAn
38  * read a word of n bytes unaligned, little endian
39  * TDS_GET_UAnLE
40  * read a word of n bytes unaligned, big endian
41  * TDS_GET_UAnBE
42  */
43 
44 /* TODO optimize (use swap, unaligned platforms) */
45 
46 /* one byte, easy... */
47 #define TDS_GET_A1LE(ptr) (((TDS_UCHAR*)(ptr))[0])
48 #define TDS_GET_A1BE(ptr) TDS_GET_A1LE(ptr)
49 #define TDS_GET_UA1LE(ptr) TDS_GET_A1LE(ptr)
50 #define TDS_GET_UA1BE(ptr) TDS_GET_A1LE(ptr)
51 
52 #define TDS_PUT_A1LE(ptr,val) do { ((TDS_UCHAR*)(ptr))[0] = (val); } while(0)
53 #define TDS_PUT_A1BE(ptr,val) TDS_PUT_A1LE(ptr,val)
54 #define TDS_PUT_UA1LE(ptr,val) TDS_PUT_A1LE(ptr,val)
55 #define TDS_PUT_UA1BE(ptr,val) TDS_PUT_A1LE(ptr,val)
56 
57 /* two bytes */
58 #define TDS_GET_UA2LE(ptr) (((TDS_UCHAR*)(ptr))[1] * 0x100u + ((TDS_UCHAR*)(ptr))[0])
59 #define TDS_GET_UA2BE(ptr) (((TDS_UCHAR*)(ptr))[0] * 0x100u + ((TDS_UCHAR*)(ptr))[1])
60 #define TDS_GET_A2LE(ptr) TDS_GET_UA2LE(ptr)
61 #define TDS_GET_A2BE(ptr) TDS_GET_UA2BE(ptr)
62 
63 #define TDS_PUT_UA2LE(ptr,val) do {\
64  ((TDS_UCHAR*)(ptr))[1] = (val)>>8; ((TDS_UCHAR*)(ptr))[0] = (val); } while(0)
65 #define TDS_PUT_UA2BE(ptr,val) do {\
66  ((TDS_UCHAR*)(ptr))[0] = (val)>>8; ((TDS_UCHAR*)(ptr))[1] = (val); } while(0)
67 #define TDS_PUT_A2LE(ptr,val) TDS_PUT_UA2LE(ptr,val)
68 #define TDS_PUT_A2BE(ptr,val) TDS_PUT_UA2BE(ptr,val)
69 
70 /* four bytes */
71 #define TDS_GET_UA4LE(ptr) \
72  (((TDS_UCHAR*)(ptr))[3] * 0x1000000u + ((TDS_UCHAR*)(ptr))[2] * 0x10000u +\
73  ((TDS_UCHAR*)(ptr))[1] * 0x100u + ((TDS_UCHAR*)(ptr))[0])
74 #define TDS_GET_UA4BE(ptr) \
75  (((TDS_UCHAR*)(ptr))[0] * 0x1000000u + ((TDS_UCHAR*)(ptr))[1] * 0x10000u +\
76  ((TDS_UCHAR*)(ptr))[2] * 0x100u + ((TDS_UCHAR*)(ptr))[3])
77 #define TDS_GET_A4LE(ptr) TDS_GET_UA4LE(ptr)
78 #define TDS_GET_A4BE(ptr) TDS_GET_UA4BE(ptr)
79 
80 #define TDS_PUT_UA4LE(ptr,val) do {\
81  ((TDS_UCHAR*)(ptr))[3] = (val)>>24; ((TDS_UCHAR*)(ptr))[2] = (val)>>16;\
82  ((TDS_UCHAR*)(ptr))[1] = (val)>>8; ((TDS_UCHAR*)(ptr))[0] = (val); } while(0)
83 #define TDS_PUT_UA4BE(ptr,val) do {\
84  ((TDS_UCHAR*)(ptr))[0] = (val)>>24; ((TDS_UCHAR*)(ptr))[1] = (val)>>16;\
85  ((TDS_UCHAR*)(ptr))[2] = (val)>>8; ((TDS_UCHAR*)(ptr))[3] = (val); } while(0)
86 #define TDS_PUT_A4LE(ptr,val) TDS_PUT_UA4LE(ptr,val)
87 #define TDS_PUT_A4BE(ptr,val) TDS_PUT_UA4BE(ptr,val)
88 
89 /* architecture dependent */
90 #ifdef WORDS_BIGENDIAN
91 # define TDS_GET_A1(ptr) TDS_GET_A1BE(ptr)
92 # define TDS_GET_UA1(ptr) TDS_GET_UA1BE(ptr)
93 # define TDS_GET_A2(ptr) TDS_GET_A2BE(ptr)
94 # define TDS_GET_UA2(ptr) TDS_GET_UA2BE(ptr)
95 # define TDS_GET_A4(ptr) TDS_GET_A4BE(ptr)
96 # define TDS_GET_UA4(ptr) TDS_GET_UA4BE(ptr)
97 # undef TDS_GET_A2BE
98 # undef TDS_GET_A4BE
99 # define TDS_GET_A2BE(ptr) (*((TDS_USMALLINT*)(ptr)))
100 # define TDS_GET_A4BE(ptr) (*((TDS_UINT*)(ptr)))
101 
102 # define TDS_PUT_A1(ptr,val) TDS_PUT_A1BE(ptr,val)
103 # define TDS_PUT_UA1(ptr,val) TDS_PUT_UA1BE(ptr,val)
104 # define TDS_PUT_A2(ptr,val) TDS_PUT_A2BE(ptr,val)
105 # define TDS_PUT_UA2(ptr,val) TDS_PUT_UA2BE(ptr,val)
106 # define TDS_PUT_A4(ptr,val) TDS_PUT_A4BE(ptr,val)
107 # define TDS_PUT_UA4(ptr,val) TDS_PUT_UA4BE(ptr,val)
108 # undef TDS_PUT_A2BE
109 # undef TDS_PUT_A4BE
110 # define TDS_PUT_A2BE(ptr,val) (*((TDS_USMALLINT*)(ptr)) = (val))
111 # define TDS_PUT_A4BE(ptr,val) (*((TDS_UINT*)(ptr)) = (val))
112 #else
113 # define TDS_GET_A1(ptr) TDS_GET_A1LE(ptr)
114 # define TDS_GET_UA1(ptr) TDS_GET_UA1LE(ptr)
115 # define TDS_GET_A2(ptr) TDS_GET_A2LE(ptr)
116 # define TDS_GET_UA2(ptr) TDS_GET_UA2LE(ptr)
117 # define TDS_GET_A4(ptr) TDS_GET_A4LE(ptr)
118 # define TDS_GET_UA4(ptr) TDS_GET_UA4LE(ptr)
119 # undef TDS_GET_A2LE
120 # undef TDS_GET_A4LE
121 # define TDS_GET_A2LE(ptr) (*((TDS_USMALLINT*)(ptr)))
122 # define TDS_GET_A4LE(ptr) (*((TDS_UINT*)(ptr)))
123 
124 # define TDS_PUT_A1(ptr,val) TDS_PUT_A1LE(ptr,val)
125 # define TDS_PUT_UA1(ptr,val) TDS_PUT_UA1LE(ptr,val)
126 # define TDS_PUT_A2(ptr,val) TDS_PUT_A2LE(ptr,val)
127 # define TDS_PUT_UA2(ptr,val) TDS_PUT_UA2LE(ptr,val)
128 # define TDS_PUT_A4(ptr,val) TDS_PUT_A4LE(ptr,val)
129 # define TDS_PUT_UA4(ptr,val) TDS_PUT_UA4LE(ptr,val)
130 # undef TDS_PUT_A2LE
131 # undef TDS_PUT_A4LE
132 # define TDS_PUT_A2LE(ptr,val) (*((TDS_USMALLINT*)(ptr)) = (val))
133 # define TDS_PUT_A4LE(ptr,val) (*((TDS_UINT*)(ptr)) = (val))
134 #endif
135 
136 /* these platform support unaligned fetch/store */
137 #if defined(__i386__) || defined(__amd64__) || defined(__CRIS__) ||\
138  defined(__powerpc__) || defined(__powerpc64__) || defined(__ppc__) || defined(__ppc64__) ||\
139  defined(__s390__) || defined(__s390x__) || defined(__m68k__)
140 # ifdef WORDS_BIGENDIAN
141 # undef TDS_GET_UA2BE
142 # undef TDS_GET_UA4BE
143 # define TDS_GET_UA2BE(ptr) TDS_GET_A2BE(ptr)
144 # define TDS_GET_UA4BE(ptr) TDS_GET_A4BE(ptr)
145 
146 # undef TDS_PUT_UA2BE
147 # undef TDS_PUT_UA4BE
148 # define TDS_PUT_UA2BE(ptr,val) TDS_PUT_A2BE(ptr,val)
149 # define TDS_PUT_UA4BE(ptr,val) TDS_PUT_A4BE(ptr,val)
150 # else
151 # undef TDS_GET_UA2LE
152 # undef TDS_GET_UA4LE
153 # define TDS_GET_UA2LE(ptr) TDS_GET_A2LE(ptr)
154 # define TDS_GET_UA4LE(ptr) TDS_GET_A4LE(ptr)
155 
156 # undef TDS_PUT_UA2LE
157 # undef TDS_PUT_UA4LE
158 # define TDS_PUT_UA2LE(ptr,val) TDS_PUT_A2LE(ptr,val)
159 # define TDS_PUT_UA4LE(ptr,val) TDS_PUT_A4LE(ptr,val)
160 # endif
161 #endif
162 
163 #if defined(__linux__) && defined(__GNUC__) && defined(__i386__)
164 # include <byteswap.h>
165 # undef TDS_GET_UA2BE
166 # undef TDS_GET_UA4BE
167 # define TDS_GET_UA2BE(ptr) ({ TDS_USMALLINT _tds_si = TDS_GET_UA2LE(ptr); bswap_16(_tds_si); })
168 # define TDS_GET_UA4BE(ptr) ({ TDS_UINT _tds_i = TDS_GET_UA4LE(ptr); bswap_32(_tds_i); })
169 
170 # undef TDS_PUT_UA2BE
171 # undef TDS_PUT_UA4BE
172 # define TDS_PUT_UA2BE(ptr,val) do {\
173  TDS_USMALLINT _tds_si = bswap_16(val); TDS_PUT_UA2LE(ptr,_tds_si); } while(0)
174 # define TDS_PUT_UA4BE(ptr,val) do {\
175  TDS_UINT _tds_i = bswap_32(val); TDS_PUT_UA4LE(ptr,_tds_i); } while(0)
176 #endif
177 
178 #endif
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