FreeTDS API: include/tdsbytes.h Source File

00001 /* FreeTDS - Library of routines accessing Sybase and Microsoft databases
00002  * Copyright (C) 2005 Frediano Ziglio
00003  *
00004  * This library is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU Library General Public
00006  * License as published by the Free Software Foundation; either
00007  * version 2 of the License, or (at your option) any later version.
00008  *
00009  * This library is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * Library General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU Library General Public
00015  * License along with this library; if not, write to the
00016  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00017  * Boston, MA 02111-1307, USA.
00018  */
00019 
00020 #ifndef _tdsbytes_h_
00021 #define _tdsbytes_h_
00022 
00023 /* $Id: tdsbytes.h,v 1.2.4.1 2008/05/26 12:49:56 freddy77 Exp $ */
00024 
00025 #ifndef _tds_h_
00026 #error tds.h must be included before tdsbytes.h
00027 #endif
00028 
00029 /*
00030  * read a word of n bytes aligned, architecture dependent endian
00031  *  TDS_GET_An
00032  * read a word of n bytes aligned, little endian
00033  *  TDS_GET_AnLE
00034  * read a word of n bytes aligned, big endian
00035  *  TDS_GET_AnBE
00036  * read a word of n bytes unaligned, architecture dependent endian
00037  *  TDS_GET_UAn
00038  * read a word of n bytes unaligned, little endian
00039  *  TDS_GET_UAnLE
00040  * read a word of n bytes unaligned, big endian
00041  *  TDS_GET_UAnBE
00042  */
00043 
00044 /* TODO optimize (use swap, unaligned platforms) */
00045 
00046 /* one byte, easy... */
00047 #define TDS_GET_A1LE(ptr)  (((TDS_UCHAR*)(ptr))[0])
00048 #define TDS_GET_A1BE(ptr)  TDS_GET_A1LE(ptr)
00049 #define TDS_GET_UA1LE(ptr) TDS_GET_A1LE(ptr)
00050 #define TDS_GET_UA1BE(ptr) TDS_GET_A1LE(ptr)
00051 
00052 #define TDS_PUT_A1LE(ptr,val)  do { ((TDS_UCHAR*)(ptr))[0] = (val); } while(0)
00053 #define TDS_PUT_A1BE(ptr,val)  TDS_PUT_A1LE(ptr,val)
00054 #define TDS_PUT_UA1LE(ptr,val) TDS_PUT_A1LE(ptr,val)
00055 #define TDS_PUT_UA1BE(ptr,val) TDS_PUT_A1LE(ptr,val)
00056 
00057 /* two bytes */
00058 #define TDS_GET_UA2LE(ptr) (((TDS_UCHAR*)(ptr))[1] * 0x100u + ((TDS_UCHAR*)(ptr))[0])
00059 #define TDS_GET_UA2BE(ptr) (((TDS_UCHAR*)(ptr))[0] * 0x100u + ((TDS_UCHAR*)(ptr))[1])
00060 #define TDS_GET_A2LE(ptr) TDS_GET_UA2LE(ptr)
00061 #define TDS_GET_A2BE(ptr) TDS_GET_UA2BE(ptr)
00062 
00063 #define TDS_PUT_UA2LE(ptr,val) do {\
00064  ((TDS_UCHAR*)(ptr))[1] = (TDS_UCHAR)((val)>>8); ((TDS_UCHAR*)(ptr))[0] = (TDS_UCHAR)(val); } while(0)
00065 #define TDS_PUT_UA2BE(ptr,val) do {\
00066  ((TDS_UCHAR*)(ptr))[0] = (TDS_UCHAR)((val)>>8); ((TDS_UCHAR*)(ptr))[1] = (TDS_UCHAR)(val); } while(0)
00067 #define TDS_PUT_A2LE(ptr,val) TDS_PUT_UA2LE(ptr,val)
00068 #define TDS_PUT_A2BE(ptr,val) TDS_PUT_UA2BE(ptr,val)
00069 
00070 /* four bytes */
00071 #define TDS_GET_UA4LE(ptr) \
00072         (((TDS_UCHAR*)(ptr))[3] * 0x1000000u + ((TDS_UCHAR*)(ptr))[2] * 0x10000u +\
00073          ((TDS_UCHAR*)(ptr))[1] * 0x100u + ((TDS_UCHAR*)(ptr))[0])
00074 #define TDS_GET_UA4BE(ptr) \
00075         (((TDS_UCHAR*)(ptr))[0] * 0x1000000u + ((TDS_UCHAR*)(ptr))[1] * 0x10000u +\
00076          ((TDS_UCHAR*)(ptr))[2] * 0x100u + ((TDS_UCHAR*)(ptr))[3])
00077 #define TDS_GET_A4LE(ptr) TDS_GET_UA4LE(ptr)
00078 #define TDS_GET_A4BE(ptr) TDS_GET_UA4BE(ptr)
00079 
00080 #define TDS_PUT_UA4LE(ptr,val) do {\
00081  ((TDS_UCHAR*)(ptr))[3] = (TDS_UCHAR)((val)>>24); ((TDS_UCHAR*)(ptr))[2] = (TDS_UCHAR)((val)>>16);\
00082  ((TDS_UCHAR*)(ptr))[1] = (TDS_UCHAR)((val)>>8); ((TDS_UCHAR*)(ptr))[0] = (TDS_UCHAR)(val); } while(0)
00083 #define TDS_PUT_UA4BE(ptr,val) do {\
00084  ((TDS_UCHAR*)(ptr))[0] = (TDS_UCHAR)((val)>>24); ((TDS_UCHAR*)(ptr))[1] = (TDS_UCHAR)((val)>>16);\
00085  ((TDS_UCHAR*)(ptr))[2] = (TDS_UCHAR)((val)>>8); ((TDS_UCHAR*)(ptr))[3] = (TDS_UCHAR)(val); } while(0)
00086 #define TDS_PUT_A4LE(ptr,val) TDS_PUT_UA4LE(ptr,val)
00087 #define TDS_PUT_A4BE(ptr,val) TDS_PUT_UA4BE(ptr,val)
00088 
00089 /* architecture dependent */
00090 #ifdef WORDS_BIGENDIAN
00091 # define TDS_GET_A1(ptr)  TDS_GET_A1BE(ptr)
00092 # define TDS_GET_UA1(ptr) TDS_GET_UA1BE(ptr)
00093 # define TDS_GET_A2(ptr)  TDS_GET_A2BE(ptr)
00094 # define TDS_GET_UA2(ptr) TDS_GET_UA2BE(ptr)
00095 # define TDS_GET_A4(ptr)  TDS_GET_A4BE(ptr)
00096 # define TDS_GET_UA4(ptr) TDS_GET_UA4BE(ptr)
00097 # undef TDS_GET_A2BE
00098 # undef TDS_GET_A4BE
00099 # define TDS_GET_A2BE(ptr) (*((TDS_USMALLINT*)(ptr)))
00100 # define TDS_GET_A4BE(ptr) (*((TDS_UINT*)(ptr)))
00101 
00102 # define TDS_PUT_A1(ptr,val)  TDS_PUT_A1BE(ptr,val)
00103 # define TDS_PUT_UA1(ptr,val) TDS_PUT_UA1BE(ptr,val)
00104 # define TDS_PUT_A2(ptr,val)  TDS_PUT_A2BE(ptr,val)
00105 # define TDS_PUT_UA2(ptr,val) TDS_PUT_UA2BE(ptr,val)
00106 # define TDS_PUT_A4(ptr,val)  TDS_PUT_A4BE(ptr,val)
00107 # define TDS_PUT_UA4(ptr,val) TDS_PUT_UA4BE(ptr,val)
00108 # undef TDS_PUT_A2BE
00109 # undef TDS_PUT_A4BE
00110 # define TDS_PUT_A2BE(ptr,val) (*((TDS_USMALLINT*)(ptr)) = (val))
00111 # define TDS_PUT_A4BE(ptr,val) (*((TDS_UINT*)(ptr)) = (val))
00112 #else
00113 # define TDS_GET_A1(ptr)  TDS_GET_A1LE(ptr)
00114 # define TDS_GET_UA1(ptr) TDS_GET_UA1LE(ptr)
00115 # define TDS_GET_A2(ptr)  TDS_GET_A2LE(ptr)
00116 # define TDS_GET_UA2(ptr) TDS_GET_UA2LE(ptr)
00117 # define TDS_GET_A4(ptr)  TDS_GET_A4LE(ptr)
00118 # define TDS_GET_UA4(ptr) TDS_GET_UA4LE(ptr)
00119 # undef TDS_GET_A2LE
00120 # undef TDS_GET_A4LE
00121 # define TDS_GET_A2LE(ptr) (*((TDS_USMALLINT*)(ptr)))
00122 # define TDS_GET_A4LE(ptr) (*((TDS_UINT*)(ptr)))
00123 
00124 # define TDS_PUT_A1(ptr,val)  TDS_PUT_A1LE(ptr,val)
00125 # define TDS_PUT_UA1(ptr,val) TDS_PUT_UA1LE(ptr,val)
00126 # define TDS_PUT_A2(ptr,val)  TDS_PUT_A2LE(ptr,val)
00127 # define TDS_PUT_UA2(ptr,val) TDS_PUT_UA2LE(ptr,val)
00128 # define TDS_PUT_A4(ptr,val)  TDS_PUT_A4LE(ptr,val)
00129 # define TDS_PUT_UA4(ptr,val) TDS_PUT_UA4LE(ptr,val)
00130 # undef TDS_PUT_A2LE
00131 # undef TDS_PUT_A4LE
00132 # define TDS_PUT_A2LE(ptr,val) (*((TDS_USMALLINT*)(ptr)) = (val))
00133 # define TDS_PUT_A4LE(ptr,val) (*((TDS_UINT*)(ptr)) = (val))
00134 #endif
00135 
00136 /* these platform support unaligned fetch/store */
00137 #if defined(__i386__) || defined(__amd64__) || defined(__CRIS__) ||\
00138   defined(__powerpc__) || defined(__powerpc64__) || defined(__ppc__) || defined(__ppc64__) ||\
00139   defined(__s390__) || defined(__s390x__) || defined(__m68k__)
00140 # ifdef WORDS_BIGENDIAN
00141 #  undef TDS_GET_UA2BE
00142 #  undef TDS_GET_UA4BE
00143 #  define TDS_GET_UA2BE(ptr) TDS_GET_A2BE(ptr)
00144 #  define TDS_GET_UA4BE(ptr) TDS_GET_A4BE(ptr)
00145 
00146 #  undef TDS_PUT_UA2BE
00147 #  undef TDS_PUT_UA4BE
00148 #  define TDS_PUT_UA2BE(ptr,val) TDS_PUT_A2BE(ptr,val)
00149 #  define TDS_PUT_UA4BE(ptr,val) TDS_PUT_A4BE(ptr,val)
00150 # else
00151 #  undef TDS_GET_UA2LE
00152 #  undef TDS_GET_UA4LE
00153 #  define TDS_GET_UA2LE(ptr) TDS_GET_A2LE(ptr)
00154 #  define TDS_GET_UA4LE(ptr) TDS_GET_A4LE(ptr)
00155 
00156 #  undef TDS_PUT_UA2LE
00157 #  undef TDS_PUT_UA4LE
00158 #  define TDS_PUT_UA2LE(ptr,val) TDS_PUT_A2LE(ptr,val)
00159 #  define TDS_PUT_UA4LE(ptr,val) TDS_PUT_A4LE(ptr,val)
00160 # endif
00161 #endif
00162 
00163 #if defined(__linux__) && defined(__GNUC__) && defined(__i386__)
00164 # include <byteswap.h>
00165 # undef TDS_GET_UA2BE
00166 # undef TDS_GET_UA4BE
00167 # define TDS_GET_UA2BE(ptr) ({ TDS_USMALLINT _tds_si = TDS_GET_UA2LE(ptr); bswap_16(_tds_si); })
00168 # define TDS_GET_UA4BE(ptr) ({ TDS_UINT _tds_i = TDS_GET_UA4LE(ptr); bswap_32(_tds_i); })
00169 
00170 # undef TDS_PUT_UA2BE
00171 # undef TDS_PUT_UA4BE
00172 # define TDS_PUT_UA2BE(ptr,val) do {\
00173    TDS_USMALLINT _tds_si = bswap_16(val); TDS_PUT_UA2LE(ptr,_tds_si); } while(0)
00174 # define TDS_PUT_UA4BE(ptr,val) do {\
00175    TDS_UINT _tds_i = bswap_32(val); TDS_PUT_UA4LE(ptr,_tds_i); } while(0)
00176 #endif
00177 
00178 #endif