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annotate nss/lib/dbm/include/mcom_db.h @ 3:150b72113545

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Add DBM and legacydb support
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:32:02 +0200
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1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2 /*-
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3 * Copyright (c) 1990, 1993, 1994
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4 * The Regents of the University of California. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions
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8 * are met:
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 * 2. Redistributions in binary form must reproduce the above copyright
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12 * notice, this list of conditions and the following disclaimer in the
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13 * documentation and/or other materials provided with the distribution.
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14 * 3. ***REMOVED*** - see
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15 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
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16 * 4. Neither the name of the University nor the names of its contributors
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17 * may be used to endorse or promote products derived from this software
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18 * without specific prior written permission.
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19 *
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20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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30 * SUCH DAMAGE.
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31 *
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32 * @(#)db.h 8.7 (Berkeley) 6/16/94
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33 */
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34
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35 #ifndef _DB_H_
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36 #define _DB_H_
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37
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38 #ifndef macintosh
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39 #include <sys/types.h>
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40 #endif
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41 #include "prtypes.h"
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42
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43 #if !defined(XP_BEOS) && !defined(XP_OS2) && !defined(XP_UNIX) || defined(NTO)
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44 typedef PRUintn uint;
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45 #endif
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46 typedef PRUint8 uint8;
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47 typedef PRUint16 uint16;
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48 /* On AIX 5.2, sys/inttypes.h (which is included by sys/types.h)
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49 * defines the types int8, int16, int32, and int64. */
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50 #if !defined(AIX)
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51 typedef PRInt32 int32;
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52 #endif
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53 typedef PRUint32 uint32;
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54
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55 #include <limits.h>
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56
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57 #ifdef __DBINTERFACE_PRIVATE
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58
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59 #ifdef HAVE_SYS_CDEFS_H
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60 #include <sys/cdefs.h>
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61 #else
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62 #include "cdefs.h"
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63 #endif
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64
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65 #ifdef HAVE_SYS_BYTEORDER_H
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66 #include <sys/byteorder.h>
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67 #endif
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68
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69 #if defined(__linux) || defined(__BEOS__)
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70 #include <endian.h>
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71 #ifndef BYTE_ORDER
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72 #define BYTE_ORDER __BYTE_ORDER
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73 #define BIG_ENDIAN __BIG_ENDIAN
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74 #define LITTLE_ENDIAN __LITTLE_ENDIAN
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75 #endif
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76 #endif /* __linux */
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77
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78 #ifdef __sgi
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79 #define BYTE_ORDER BIG_ENDIAN
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80 #define BIG_ENDIAN 4321
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81 #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
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82 #endif
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83
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84 #ifdef __sun
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85 #define BIG_ENDIAN 4321
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86 #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
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87
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88 #ifndef __SVR4
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89 /* compat.h is only in 4.1.3 machines. - dp */
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90 #include <compat.h>
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91 #endif
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92
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93 /* XXX - dp
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94 * Need to find a general way of defining endian-ness in SunOS 5.3
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95 * SunOS 5.4 defines _BIG_ENDIAN and _LITTLE_ENDIAN
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96 * SunOS 5.3 does nothing like this.
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97 */
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98
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99 #ifndef BYTE_ORDER
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100
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101 #if defined(_BIG_ENDIAN)
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102 #define BYTE_ORDER BIG_ENDIAN
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103 #elif defined(_LITTLE_ENDIAN)
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104 #define BYTE_ORDER LITTLE_ENDIAN
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105 #elif !defined(__SVR4)
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106 /* 4.1.3 is always BIG_ENDIAN as it was released only on sparc platforms. */
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107 #define BYTE_ORDER BIG_ENDIAN
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108 #elif !defined(vax) && !defined(ntohl) && !defined(lint) && !defined(i386)
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109 /* 5.3 big endian. Copied this above line from sys/byteorder.h */
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110 /* Now we are in a 5.3 SunOS rather non 5.4 or above SunOS */
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111 #define BYTE_ORDER BIG_ENDIAN
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112 #else
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113 #define BYTE_ORDER LITTLE_ENDIAN
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114 #endif
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115
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116 #endif /* !BYTE_ORDER */
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117 #endif /* __sun */
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118
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119 #if defined(__hpux) || defined(__hppa)
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120 #define BYTE_ORDER BIG_ENDIAN
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121 #define BIG_ENDIAN 4321
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122 #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
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123 #endif
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124
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125 #if defined(AIXV3) || defined(AIX)
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126 /* BYTE_ORDER, LITTLE_ENDIAN, BIG_ENDIAN are all defined here */
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127 #include <sys/machine.h>
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128 #endif
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129
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130 /* Digital Unix */
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131 #ifdef __osf__
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132 #include <machine/endian.h>
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133 #endif
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134
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135 #ifdef __alpha
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136 #ifndef WIN32
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137 #else
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138 /* Alpha NT */
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139 #define BYTE_ORDER LITTLE_ENDIAN
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140 #define BIG_ENDIAN 4321
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141 #define LITTLE_ENDIAN 1234
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142 #endif
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143 #endif
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144
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145 #ifdef NCR
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146 #include <sys/endian.h>
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147 #endif
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148
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149 #ifdef __QNX__
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150 #ifdef __QNXNTO__
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151 #include <sys/param.h>
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152 #else
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153 #define LITTLE_ENDIAN 1234
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154 #define BIG_ENDIAN 4321
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155 #define BYTE_ORDER LITTLE_ENDIAN
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156 #endif
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157 #endif
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158
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159 #ifdef SNI
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160 /* #include <sys/hetero.h> */
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161 #define BYTE_ORDER BIG_ENDIAN
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162 #define BIG_ENDIAN 4321
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163 #define LITTLE_ENDIAN 1234
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164 #endif
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165
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166 #ifdef _WINDOWS
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167 #ifdef BYTE_ORDER
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168 #undef BYTE_ORDER
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169 #endif
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170
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171 #define BYTE_ORDER LITTLE_ENDIAN
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172 #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
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173 #define BIG_ENDIAN 4321
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174 #endif
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175
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176 #ifdef macintosh
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177 #define BIG_ENDIAN 4321
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178 #define LITTLE_ENDIAN 1234
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179 #define BYTE_ORDER BIG_ENDIAN
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180 #endif
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181
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182 #endif /* __DBINTERFACE_PRIVATE */
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183
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184 #ifdef SCO
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185 #define MAXPATHLEN 1024
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186 #endif
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187
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188 #include <fcntl.h>
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189
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190 #if defined(_WINDOWS) || defined(XP_OS2)
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191 #include <stdio.h>
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192 #include <io.h>
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193
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194 #ifndef XP_OS2
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195 #define MAXPATHLEN 1024
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196 #endif
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197
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198 #define EFTYPE EINVAL /* POSIX 1003.1 format errno. */
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199
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200 #ifndef STDERR_FILENO
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201 #define STDIN_FILENO 0 /* ANSI C #defines */
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202 #define STDOUT_FILENO 1
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203 #define STDERR_FILENO 2
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204 #endif
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205
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206 #ifndef O_ACCMODE /* POSIX 1003.1 access mode mask. */
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207 #define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
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208 #endif
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209 #endif
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210
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211 #ifdef macintosh
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212 #include <stdio.h>
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213 #include "xp_mcom.h"
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214 #define O_ACCMODE 3 /* Mask for file access modes */
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215 #define EFTYPE 2000
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216 PR_BEGIN_EXTERN_C
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217 int mkstemp(const char *path);
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218 PR_END_EXTERN_C
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219 #endif /* MACINTOSH */
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220
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221 #if !defined(_WINDOWS) && !defined(macintosh)
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222 #include <sys/stat.h>
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223 #include <errno.h>
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224 #endif
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225
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226 /* define EFTYPE since most don't */
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227 #ifndef EFTYPE
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228 #define EFTYPE EINVAL /* POSIX 1003.1 format errno. */
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229 #endif
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230
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231 #define RET_ERROR -1 /* Return values. */
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232 #define RET_SUCCESS 0
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233 #define RET_SPECIAL 1
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234
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235 #define MAX_PAGE_NUMBER 0xffffffff /* >= # of pages in a file */
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236
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237 #ifndef __sgi
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238 typedef uint32 pgno_t;
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239 #endif
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240
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241 #define MAX_PAGE_OFFSET 65535 /* >= # of bytes in a page */
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242 typedef uint16 indx_t;
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243 #define MAX_REC_NUMBER 0xffffffff /* >= # of records in a tree */
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244 typedef uint32 recno_t;
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245
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246 /* Key/data structure -- a Data-Base Thang. */
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247 typedef struct {
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248 void *data; /* data */
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249 size_t size; /* data length */
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250 } DBT;
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251
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252 /* Routine flags. */
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253 #define R_CURSOR 1 /* del, put, seq */
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254 #define __R_UNUSED 2 /* UNUSED */
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255 #define R_FIRST 3 /* seq */
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256 #define R_IAFTER 4 /* put (RECNO) */
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257 #define R_IBEFORE 5 /* put (RECNO) */
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258 #define R_LAST 6 /* seq (BTREE, RECNO) */
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259 #define R_NEXT 7 /* seq */
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260 #define R_NOOVERWRITE 8 /* put */
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261 #define R_PREV 9 /* seq (BTREE, RECNO) */
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262 #define R_SETCURSOR 10 /* put (RECNO) */
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263 #define R_RECNOSYNC 11 /* sync (RECNO) */
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264
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265 typedef enum { DB_BTREE, DB_HASH, DB_RECNO } DBTYPE;
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266
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267 typedef enum { LockOutDatabase, UnlockDatabase } DBLockFlagEnum;
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268
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269 /*
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270 * !!!
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271 * The following flags are included in the dbopen(3) call as part of the
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272 * open(2) flags. In order to avoid conflicts with the open flags, start
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273 * at the top of the 16 or 32-bit number space and work our way down. If
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274 * the open flags were significantly expanded in the future, it could be
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275 * a problem. Wish I'd left another flags word in the dbopen call.
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276 *
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277 * !!!
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278 * None of this stuff is implemented yet. The only reason that it's here
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279 * is so that the access methods can skip copying the key/data pair when
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280 * the DB_LOCK flag isn't set.
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281 */
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282 #if UINT_MAX > 65535
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283 #define DB_LOCK 0x20000000 /* Do locking. */
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284 #define DB_SHMEM 0x40000000 /* Use shared memory. */
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285 #define DB_TXN 0x80000000 /* Do transactions. */
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286 #else
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287 #define DB_LOCK 0x2000 /* Do locking. */
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288 #define DB_SHMEM 0x4000 /* Use shared memory. */
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289 #define DB_TXN 0x8000 /* Do transactions. */
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290 #endif
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291
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292 /* Access method description structure. */
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293 typedef struct __db {
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294 DBTYPE type; /* Underlying db type. */
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295 int (*close) (struct __db *);
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296 int (*del) (const struct __db *, const DBT *, uint);
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297 int (*get) (const struct __db *, const DBT *, DBT *, uint);
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298 int (*put) (const struct __db *, DBT *, const DBT *, uint);
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299 int (*seq) (const struct __db *, DBT *, DBT *, uint);
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300 int (*sync) (const struct __db *, uint);
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301 void *internal; /* Access method private. */
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302 int (*fd) (const struct __db *);
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303 } DB;
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304
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305 #define BTREEMAGIC 0x053162
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306 #define BTREEVERSION 3
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307
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308 /* Structure used to pass parameters to the btree routines. */
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309 typedef struct {
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310 #define R_DUP 0x01 /* duplicate keys */
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311 uint32 flags;
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312 uint cachesize; /* bytes to cache */
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313 int maxkeypage; /* maximum keys per page */
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314 int minkeypage; /* minimum keys per page */
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315 uint psize; /* page size */
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316 int (*compare) /* comparison function */
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317 (const DBT *, const DBT *);
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318 size_t (*prefix) /* prefix function */
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319 (const DBT *, const DBT *);
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320 int lorder; /* byte order */
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321 } BTREEINFO;
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322
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323 #define HASHMAGIC 0x061561
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324 #define HASHVERSION 2
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325
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326 /* Structure used to pass parameters to the hashing routines. */
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327 typedef struct {
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328 uint bsize; /* bucket size */
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329 uint ffactor; /* fill factor */
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330 uint nelem; /* number of elements */
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331 uint cachesize; /* bytes to cache */
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332 uint32 /* hash function */
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333 (*hash) (const void *, size_t);
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334 int lorder; /* byte order */
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335 } HASHINFO;
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336
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337 /* Structure used to pass parameters to the record routines. */
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338 typedef struct {
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339 #define R_FIXEDLEN 0x01 /* fixed-length records */
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340 #define R_NOKEY 0x02 /* key not required */
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341 #define R_SNAPSHOT 0x04 /* snapshot the input */
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342 uint32 flags;
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343 uint cachesize; /* bytes to cache */
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344 uint psize; /* page size */
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345 int lorder; /* byte order */
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346 size_t reclen; /* record length (fixed-length records) */
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347 uint8 bval; /* delimiting byte (variable-length records */
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348 char *bfname; /* btree file name */
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349 } RECNOINFO;
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350
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351 #ifdef __DBINTERFACE_PRIVATE
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352 /*
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353 * Little endian <==> big endian 32-bit swap macros.
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354 * M_32_SWAP swap a memory location
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355 * P_32_SWAP swap a referenced memory location
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356 * P_32_COPY swap from one location to another
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357 */
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358 #define M_32_SWAP(a) { \
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359 uint32 _tmp = a; \
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360 ((char *)&a)[0] = ((char *)&_tmp)[3]; \
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361 ((char *)&a)[1] = ((char *)&_tmp)[2]; \
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362 ((char *)&a)[2] = ((char *)&_tmp)[1]; \
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363 ((char *)&a)[3] = ((char *)&_tmp)[0]; \
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364 }
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365 #define P_32_SWAP(a) { \
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366 uint32 _tmp = *(uint32 *)a; \
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367 ((char *)a)[0] = ((char *)&_tmp)[3]; \
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368 ((char *)a)[1] = ((char *)&_tmp)[2]; \
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369 ((char *)a)[2] = ((char *)&_tmp)[1]; \
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370 ((char *)a)[3] = ((char *)&_tmp)[0]; \
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371 }
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372 #define P_32_COPY(a, b) { \
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373 ((char *)&(b))[0] = ((char *)&(a))[3]; \
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374 ((char *)&(b))[1] = ((char *)&(a))[2]; \
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375 ((char *)&(b))[2] = ((char *)&(a))[1]; \
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376 ((char *)&(b))[3] = ((char *)&(a))[0]; \
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377 }
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378
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379 /*
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380 * Little endian <==> big endian 16-bit swap macros.
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381 * M_16_SWAP swap a memory location
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382 * P_16_SWAP swap a referenced memory location
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383 * P_16_COPY swap from one location to another
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384 */
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385 #define M_16_SWAP(a) { \
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386 uint16 _tmp = a; \
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387 ((char *)&a)[0] = ((char *)&_tmp)[1]; \
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388 ((char *)&a)[1] = ((char *)&_tmp)[0]; \
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389 }
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390 #define P_16_SWAP(a) { \
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391 uint16 _tmp = *(uint16 *)a; \
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392 ((char *)a)[0] = ((char *)&_tmp)[1]; \
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393 ((char *)a)[1] = ((char *)&_tmp)[0]; \
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394 }
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395 #define P_16_COPY(a, b) { \
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396 ((char *)&(b))[0] = ((char *)&(a))[1]; \
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397 ((char *)&(b))[1] = ((char *)&(a))[0]; \
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398 }
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399 #endif
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400
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401 PR_BEGIN_EXTERN_C
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402
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403 extern DB *
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404 dbopen (const char *, int, int, DBTYPE, const void *);
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405
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406 /* set or unset a global lock flag to disable the
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407 * opening of any DBM file
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408 */
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409 void dbSetOrClearDBLock(DBLockFlagEnum type);
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410
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411 #ifdef __DBINTERFACE_PRIVATE
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412 DB *__bt_open (const char *, int, int, const BTREEINFO *, int);
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413 DB *__hash_open (const char *, int, int, const HASHINFO *, int);
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414 DB *__rec_open (const char *, int, int, const RECNOINFO *, int);
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415 void __dbpanic (DB *dbp);
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416 #endif
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417
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418 PR_END_EXTERN_C
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419
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420 #endif /* !_DB_H_ */
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