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428
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1 /* Database access routines
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2 Copyright (C) 1996, William M. Perry
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3025
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3 Copyright (C) 2001, 2002, 2005 Ben Wing.
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428
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Not in FSF. */
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23
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24 /* Written by Bill Perry */
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25 /* Substantially rewritten by Martin Buchholz */
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26 /* db 2.x support added by Andreas Jaeger */
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771
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27 /* Mule-ized 6-22-00 Ben Wing */
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428
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28
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29 #include <config.h>
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30 #include "lisp.h"
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771
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31
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428
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32 #include "sysfile.h"
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33 #include "buffer.h"
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34
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35 #ifndef HAVE_DATABASE
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36 #error HAVE_DATABASE not defined!!
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37 #endif
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38
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39 #include "database.h" /* Our include file */
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40
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41 #ifdef HAVE_BERKELEY_DB
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42 /* Work around Berkeley DB's use of int types which are defined
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43 slightly differently in the not quite yet standard <inttypes.h>.
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44 See db.h for details of why we're resorting to this... */
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45 /* glibc 2.1 doesn't have this problem with DB 2.x */
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46 #if !(defined __GLIBC__ && __GLIBC_MINOR__ >= 1)
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47 #ifdef HAVE_INTTYPES_H
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48 #define __BIT_TYPES_DEFINED__
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49 #include <inttypes.h>
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2495
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50 #if !defined(__FreeBSD__) && !defined(__NetBSD__)
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428
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51 typedef uint8_t u_int8_t;
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52 typedef uint16_t u_int16_t;
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53 typedef uint32_t u_int32_t;
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54 #ifdef WE_DONT_NEED_QUADS
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55 typedef uint64_t u_int64_t;
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56 #endif /* WE_DONT_NEED_QUADS */
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1453
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57 #endif /* __FreeBSD__ */
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428
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58 #endif /* HAVE_INTTYPES_H */
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59 #endif /* !(defined __GLIBC__ && __GLIBC_MINOR__ >= 1) */
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1460
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60 /* Berkeley DB wants __STDC__ to be defined; else if does `#define const' */
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61 #if ! defined (__STDC__) && ! defined(__cplusplus)
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62 #define __STDC__ 0
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63 #endif
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442
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64 #include DB_H_FILE /* Berkeley db's header file */
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428
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65 #ifndef DB_VERSION_MAJOR
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66 # define DB_VERSION_MAJOR 1
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67 #endif /* DB_VERSION_MAJOR */
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1141
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68 #ifndef DB_VERSION_MINOR
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69 # define DB_VERSION_MINOR 0
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70 #endif /* DB_VERSION_MINOR */
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428
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71 Lisp_Object Qberkeley_db;
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72 Lisp_Object Qhash, Qbtree, Qrecno, Qunknown;
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448
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73 #if DB_VERSION_MAJOR > 2
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74 Lisp_Object Qqueue;
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75 #endif
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428
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76 #endif /* HAVE_BERKELEY_DB */
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77
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78 #ifdef HAVE_DBM
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79 #include <ndbm.h>
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80 Lisp_Object Qdbm;
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81 #endif /* HAVE_DBM */
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82
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83 Lisp_Object Vdatabase_coding_system;
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84
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85 Lisp_Object Qdatabasep;
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86
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87 typedef struct
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88 {
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89 Lisp_Object (*get_subtype) (Lisp_Database *);
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90 Lisp_Object (*get_type) (Lisp_Database *);
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91 Lisp_Object (*get) (Lisp_Database *, Lisp_Object);
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92 int (*put) (Lisp_Database *, Lisp_Object, Lisp_Object, Lisp_Object);
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93 int (*rem) (Lisp_Database *, Lisp_Object);
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94 void (*map) (Lisp_Database *, Lisp_Object);
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95 void (*close) (Lisp_Database *);
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96 Lisp_Object (*last_error) (Lisp_Database *);
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97 } DB_FUNCS;
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98
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99 struct Lisp_Database
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100 {
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3017
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101 struct LCRECORD_HEADER header;
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428
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102 Lisp_Object fname;
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103 int mode;
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104 int access_;
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105 int dberrno;
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106 int live_p;
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107 #ifdef HAVE_DBM
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108 DBM *dbm_handle;
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109 #endif
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110 #ifdef HAVE_BERKELEY_DB
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111 DB *db_handle;
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112 #endif
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113 DB_FUNCS *funcs;
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114 Lisp_Object coding_system;
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115 };
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116
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117 #define XDATABASE(x) XRECORD (x, database, Lisp_Database)
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617
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118 #define wrap_database(p) wrap_record (p, database)
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428
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119 #define DATABASEP(x) RECORDP (x, database)
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120 #define CHECK_DATABASE(x) CHECK_RECORD (x, database)
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121 #define CONCHECK_DATABASE(x) CONCHECK_RECORD (x, database)
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122 #define DATABASE_LIVE_P(x) (x->live_p)
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123
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124 #define CHECK_LIVE_DATABASE(db) do { \
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125 CHECK_DATABASE (db); \
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126 if (!DATABASE_LIVE_P (XDATABASE(db))) \
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563
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127 invalid_operation ("Attempting to access closed database", db); \
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428
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128 } while (0)
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129
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130
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131 static Lisp_Database *
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132 allocate_database (void)
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133 {
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3017
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134 Lisp_Database *db = ALLOC_LCRECORD_TYPE (Lisp_Database, &lrecord_database);
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428
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135
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136 db->fname = Qnil;
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137 db->live_p = 0;
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138 #ifdef HAVE_BERKELEY_DB
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139 db->db_handle = NULL;
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140 #endif
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141 #ifdef HAVE_DBM
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142 db->dbm_handle = NULL;
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143 #endif
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144 db->access_ = 0;
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145 db->mode = 0;
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146 db->dberrno = 0;
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771
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147 db->coding_system = Qnil;
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428
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148 return db;
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149 }
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150
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1204
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151 static const struct memory_description database_description[] = {
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934
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152 { XD_LISP_OBJECT, offsetof (struct Lisp_Database, fname) },
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153 { XD_END}
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154 };
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155
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428
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156 static Lisp_Object
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444
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157 mark_database (Lisp_Object object)
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428
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158 {
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444
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159 Lisp_Database *db = XDATABASE (object);
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428
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160 return db->fname;
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161 }
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162
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163 static void
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2286
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164 print_database (Lisp_Object obj, Lisp_Object printcharfun,
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165 int UNUSED (escapeflag))
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428
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166 {
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167 Lisp_Database *db = XDATABASE (obj);
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168
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169 if (print_readably)
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563
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170 printing_unreadable_object ("#<database 0x%x>", db->header.uid);
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428
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171
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793
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172 write_fmt_string_lisp (printcharfun, "#<database \"%s\" (%s/%s/",
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173 3, db->fname, db->funcs->get_type (db),
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174 db->funcs->get_subtype (db));
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175
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176 write_fmt_string (printcharfun, "%s) 0x%x>",
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177 (!DATABASE_LIVE_P (db) ? "closed" :
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178 (db->access_ & O_WRONLY) ? "writeonly" :
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179 (db->access_ & O_RDWR) ? "readwrite" : "readonly"),
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180 db->header.uid);
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428
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181 }
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182
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183 static void
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184 finalize_database (void *header, int for_disksave)
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185 {
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186 Lisp_Database *db = (Lisp_Database *) header;
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187
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188 if (for_disksave)
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189 {
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563
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190 invalid_operation
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793
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191 ("Can't dump an emacs containing database objects",
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192 wrap_database (db));
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428
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193 }
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194 db->funcs->close (db);
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195 }
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196
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934
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197 DEFINE_LRECORD_IMPLEMENTATION ("database", database,
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198 0, /*dumpable-flag*/
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199 mark_database, print_database,
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200 finalize_database, 0, 0,
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201 database_description,
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202 Lisp_Database);
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428
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203
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204 DEFUN ("close-database", Fclose_database, 1, 1, 0, /*
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205 Close database DATABASE.
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206 */
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207 (database))
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208 {
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209 Lisp_Database *db;
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210 CHECK_LIVE_DATABASE (database);
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211 db = XDATABASE (database);
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212 db->funcs->close (db);
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213 db->live_p = 0;
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214 return Qnil;
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215 }
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216
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217 DEFUN ("database-type", Fdatabase_type, 1, 1, 0, /*
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218 Return the type of database DATABASE.
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219 */
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220 (database))
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221 {
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222 CHECK_DATABASE (database);
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223
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224 return XDATABASE (database)->funcs->get_type (XDATABASE (database));
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225 }
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226
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227 DEFUN ("database-subtype", Fdatabase_subtype, 1, 1, 0, /*
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228 Return the subtype of database DATABASE, if any.
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229 */
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230 (database))
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231 {
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232 CHECK_DATABASE (database);
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233
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234 return XDATABASE (database)->funcs->get_subtype (XDATABASE (database));
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235 }
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236
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237 DEFUN ("database-live-p", Fdatabase_live_p, 1, 1, 0, /*
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444
|
238 Return t if OBJECT is an active database.
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428
|
239 */
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444
|
240 (object))
|
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428
|
241 {
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444
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242 return DATABASEP (object) && DATABASE_LIVE_P (XDATABASE (object)) ?
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243 Qt : Qnil;
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428
|
244 }
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245
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246 DEFUN ("database-file-name", Fdatabase_file_name, 1, 1, 0, /*
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247 Return the filename associated with the database DATABASE.
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248 */
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249 (database))
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250 {
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251 CHECK_DATABASE (database);
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252
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253 return XDATABASE (database)->fname;
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254 }
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255
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256 DEFUN ("databasep", Fdatabasep, 1, 1, 0, /*
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444
|
257 Return t if OBJECT is a database.
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|
428
|
258 */
|
|
444
|
259 (object))
|
|
428
|
260 {
|
|
444
|
261 return DATABASEP (object) ? Qt : Qnil;
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428
|
262 }
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263
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264 #ifdef HAVE_DBM
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265 static void
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266 dbm_map (Lisp_Database *db, Lisp_Object func)
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267 {
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268 datum keydatum, valdatum;
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269 Lisp_Object key, val;
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270
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271 for (keydatum = dbm_firstkey (db->dbm_handle);
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272 keydatum.dptr != NULL;
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273 keydatum = dbm_nextkey (db->dbm_handle))
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274 {
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275 valdatum = dbm_fetch (db->dbm_handle, keydatum);
|
|
771
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276 key = make_ext_string (keydatum.dptr, keydatum.dsize,
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277 db->coding_system);
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278 val = make_ext_string (valdatum.dptr, valdatum.dsize,
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279 db->coding_system);
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428
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280 call2 (func, key, val);
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281 }
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282 }
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283
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284 static Lisp_Object
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285 dbm_get (Lisp_Database *db, Lisp_Object key)
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286 {
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287 datum keydatum, valdatum;
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288
|
|
771
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289 TO_EXTERNAL_FORMAT (LISP_STRING, key,
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290 ALLOCA, (keydatum.dptr, keydatum.dsize),
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291 db->coding_system);
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428
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292 valdatum = dbm_fetch (db->dbm_handle, keydatum);
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293
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294 return (valdatum.dptr
|
|
771
|
295 ? make_ext_string (valdatum.dptr, valdatum.dsize,
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296 db->coding_system)
|
|
428
|
297 : Qnil);
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|
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298 }
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299
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300 static int
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301 dbm_put (Lisp_Database *db,
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302 Lisp_Object key, Lisp_Object val, Lisp_Object replace)
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|
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303 {
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304 datum keydatum, valdatum;
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305
|
|
771
|
306 TO_EXTERNAL_FORMAT (LISP_STRING, val,
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307 ALLOCA, (valdatum.dptr, valdatum.dsize),
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308 db->coding_system);
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309 TO_EXTERNAL_FORMAT (LISP_STRING, key,
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310 ALLOCA, (keydatum.dptr, keydatum.dsize),
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311 db->coding_system);
|
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428
|
312
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|
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313 return !dbm_store (db->dbm_handle, keydatum, valdatum,
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314 NILP (replace) ? DBM_INSERT : DBM_REPLACE);
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|
|
315 }
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316
|
|
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317 static int
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318 dbm_remove (Lisp_Database *db, Lisp_Object key)
|
|
|
319 {
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|
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320 datum keydatum;
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|
321
|
|
771
|
322 TO_EXTERNAL_FORMAT (LISP_STRING, key,
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|
|
323 ALLOCA, (keydatum.dptr, keydatum.dsize),
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|
|
324 db->coding_system);
|
|
428
|
325
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|
|
326 return dbm_delete (db->dbm_handle, keydatum);
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|
|
327 }
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|
|
328
|
|
|
329 static Lisp_Object
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|
2494
|
330 dbm_type (Lisp_Database *UNUSED (db))
|
|
428
|
331 {
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|
|
332 return Qdbm;
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|
|
333 }
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|
|
334
|
|
|
335 static Lisp_Object
|
|
2494
|
336 dbm_subtype (Lisp_Database *UNUSED (db))
|
|
428
|
337 {
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|
|
338 return Qnil;
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|
|
339 }
|
|
|
340
|
|
|
341 static Lisp_Object
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|
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342 dbm_lasterr (Lisp_Database *db)
|
|
|
343 {
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|
|
344 return lisp_strerror (db->dberrno);
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|
|
345 }
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|
|
346
|
|
|
347 static void
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|
|
348 dbm_closeit (Lisp_Database *db)
|
|
|
349 {
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|
|
350 if (db->dbm_handle)
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|
|
351 {
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|
|
352 dbm_close (db->dbm_handle);
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|
|
353 db->dbm_handle = NULL;
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|
|
354 }
|
|
|
355 }
|
|
|
356
|
|
|
357 static DB_FUNCS ndbm_func_block =
|
|
|
358 {
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|
|
359 dbm_subtype,
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|
|
360 dbm_type,
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|
|
361 dbm_get,
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|
|
362 dbm_put,
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|
|
363 dbm_remove,
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|
|
364 dbm_map,
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|
|
365 dbm_closeit,
|
|
|
366 dbm_lasterr
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|
|
367 };
|
|
|
368 #endif /* HAVE_DBM */
|
|
|
369
|
|
|
370 #ifdef HAVE_BERKELEY_DB
|
|
|
371 static Lisp_Object
|
|
2286
|
372 berkdb_type (Lisp_Database *UNUSED (db))
|
|
428
|
373 {
|
|
|
374 return Qberkeley_db;
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|
|
375 }
|
|
|
376
|
|
|
377 static Lisp_Object
|
|
|
378 berkdb_subtype (Lisp_Database *db)
|
|
|
379 {
|
|
|
380 if (!db->db_handle)
|
|
|
381 return Qnil;
|
|
|
382
|
|
|
383 switch (db->db_handle->type)
|
|
|
384 {
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|
|
385 case DB_BTREE: return Qbtree;
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|
|
386 case DB_HASH: return Qhash;
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|
|
387 case DB_RECNO: return Qrecno;
|
|
448
|
388 #if DB_VERSION_MAJOR > 2
|
|
|
389 case DB_QUEUE: return Qqueue;
|
|
|
390 #endif
|
|
428
|
391 default: return Qunknown;
|
|
|
392 }
|
|
|
393 }
|
|
|
394
|
|
|
395 static Lisp_Object
|
|
|
396 berkdb_lasterr (Lisp_Database *db)
|
|
|
397 {
|
|
|
398 return lisp_strerror (db->dberrno);
|
|
|
399 }
|
|
|
400
|
|
|
401 static Lisp_Object
|
|
|
402 berkdb_get (Lisp_Database *db, Lisp_Object key)
|
|
|
403 {
|
|
|
404 DBT keydatum, valdatum;
|
|
|
405 int status = 0;
|
|
|
406
|
|
|
407 /* DB Version 2 requires DBT's to be zeroed before use. */
|
|
|
408 xzero (keydatum);
|
|
|
409 xzero (valdatum);
|
|
|
410
|
|
771
|
411 TO_EXTERNAL_FORMAT (LISP_STRING, key,
|
|
|
412 ALLOCA, (keydatum.data, keydatum.size),
|
|
|
413 db->coding_system);
|
|
428
|
414
|
|
|
415 #if DB_VERSION_MAJOR == 1
|
|
|
416 status = db->db_handle->get (db->db_handle, &keydatum, &valdatum, 0);
|
|
|
417 #else
|
|
|
418 status = db->db_handle->get (db->db_handle, NULL, &keydatum, &valdatum, 0);
|
|
|
419 #endif /* DB_VERSION_MAJOR */
|
|
|
420
|
|
|
421 if (!status)
|
|
1645
|
422 return make_ext_string ((const Extbyte *) valdatum.data, valdatum.size,
|
|
771
|
423 db->coding_system);
|
|
428
|
424
|
|
|
425 #if DB_VERSION_MAJOR == 1
|
|
|
426 db->dberrno = (status == 1) ? -1 : errno;
|
|
|
427 #else
|
|
|
428 db->dberrno = (status < 0) ? -1 : errno;
|
|
|
429 #endif /* DB_VERSION_MAJOR */
|
|
|
430
|
|
|
431 return Qnil;
|
|
|
432 }
|
|
|
433
|
|
|
434 static int
|
|
|
435 berkdb_put (Lisp_Database *db,
|
|
|
436 Lisp_Object key,
|
|
|
437 Lisp_Object val,
|
|
|
438 Lisp_Object replace)
|
|
|
439 {
|
|
|
440 DBT keydatum, valdatum;
|
|
|
441 int status = 0;
|
|
|
442
|
|
|
443 /* DB Version 2 requires DBT's to be zeroed before use. */
|
|
|
444 xzero (keydatum);
|
|
|
445 xzero (valdatum);
|
|
|
446
|
|
771
|
447 TO_EXTERNAL_FORMAT (LISP_STRING, key,
|
|
|
448 ALLOCA, (keydatum.data, keydatum.size),
|
|
|
449 db->coding_system);
|
|
|
450 TO_EXTERNAL_FORMAT (LISP_STRING, val,
|
|
|
451 ALLOCA, (valdatum.data, valdatum.size),
|
|
|
452 db->coding_system);
|
|
428
|
453 #if DB_VERSION_MAJOR == 1
|
|
|
454 status = db->db_handle->put (db->db_handle, &keydatum, &valdatum,
|
|
|
455 NILP (replace) ? R_NOOVERWRITE : 0);
|
|
|
456 db->dberrno = (status == 1) ? -1 : errno;
|
|
|
457 #else
|
|
|
458 status = db->db_handle->put (db->db_handle, NULL, &keydatum, &valdatum,
|
|
|
459 NILP (replace) ? DB_NOOVERWRITE : 0);
|
|
|
460 db->dberrno = (status < 0) ? -1 : errno;
|
|
|
461 #endif/* DV_VERSION_MAJOR = 2 */
|
|
|
462
|
|
|
463 return status;
|
|
|
464 }
|
|
|
465
|
|
|
466 static int
|
|
|
467 berkdb_remove (Lisp_Database *db, Lisp_Object key)
|
|
|
468 {
|
|
|
469 DBT keydatum;
|
|
|
470 int status;
|
|
|
471
|
|
|
472 /* DB Version 2 requires DBT's to be zeroed before use. */
|
|
|
473 xzero (keydatum);
|
|
|
474
|
|
771
|
475 TO_EXTERNAL_FORMAT (LISP_STRING, key,
|
|
|
476 ALLOCA, (keydatum.data, keydatum.size),
|
|
|
477 db->coding_system);
|
|
428
|
478
|
|
|
479 #if DB_VERSION_MAJOR == 1
|
|
|
480 status = db->db_handle->del (db->db_handle, &keydatum, 0);
|
|
|
481 #else
|
|
|
482 status = db->db_handle->del (db->db_handle, NULL, &keydatum, 0);
|
|
|
483 #endif /* DB_VERSION_MAJOR */
|
|
|
484
|
|
|
485 if (!status)
|
|
|
486 return 0;
|
|
|
487
|
|
|
488 #if DB_VERSION_MAJOR == 1
|
|
|
489 db->dberrno = (status == 1) ? -1 : errno;
|
|
|
490 #else
|
|
|
491 db->dberrno = (status < 0) ? -1 : errno;
|
|
|
492 #endif /* DB_VERSION_MAJOR */
|
|
|
493
|
|
|
494 return 1;
|
|
|
495 }
|
|
|
496
|
|
|
497 static void
|
|
|
498 berkdb_map (Lisp_Database *db, Lisp_Object func)
|
|
|
499 {
|
|
|
500 DBT keydatum, valdatum;
|
|
|
501 Lisp_Object key, val;
|
|
|
502 DB *dbp = db->db_handle;
|
|
|
503 int status;
|
|
|
504
|
|
|
505 xzero (keydatum);
|
|
|
506 xzero (valdatum);
|
|
|
507
|
|
|
508 #if DB_VERSION_MAJOR == 1
|
|
|
509 for (status = dbp->seq (dbp, &keydatum, &valdatum, R_FIRST);
|
|
|
510 status == 0;
|
|
|
511 status = dbp->seq (dbp, &keydatum, &valdatum, R_NEXT))
|
|
|
512 {
|
|
2646
|
513 key = make_ext_string ((const Extbyte *) keydatum.data, keydatum.size,
|
|
771
|
514 db->coding_system);
|
|
2646
|
515 val = make_ext_string ((const Extbyte *) valdatum.data, valdatum.size,
|
|
771
|
516 db->coding_system);
|
|
428
|
517 call2 (func, key, val);
|
|
|
518 }
|
|
|
519 #else
|
|
|
520 {
|
|
|
521 DBC *dbcp;
|
|
|
522
|
|
|
523 #if DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >=6
|
|
|
524 status = dbp->cursor (dbp, NULL, &dbcp, 0);
|
|
|
525 #else
|
|
|
526 status = dbp->cursor (dbp, NULL, &dbcp);
|
|
440
|
527 #endif
|
|
428
|
528 for (status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_FIRST);
|
|
|
529 status == 0;
|
|
|
530 status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_NEXT))
|
|
|
531 {
|
|
1645
|
532 key = make_ext_string ((const Extbyte *) keydatum.data, keydatum.size,
|
|
771
|
533 db->coding_system);
|
|
1645
|
534 val = make_ext_string ((const Extbyte *) valdatum.data, valdatum.size,
|
|
771
|
535 db->coding_system);
|
|
428
|
536 call2 (func, key, val);
|
|
|
537 }
|
|
|
538 dbcp->c_close (dbcp);
|
|
|
539 }
|
|
|
540 #endif /* DB_VERSION_MAJOR */
|
|
|
541 }
|
|
|
542
|
|
|
543 static void
|
|
|
544 berkdb_close (Lisp_Database *db)
|
|
|
545 {
|
|
|
546 if (db->db_handle)
|
|
|
547 {
|
|
|
548 #if DB_VERSION_MAJOR == 1
|
|
|
549 db->db_handle->sync (db->db_handle, 0);
|
|
|
550 db->db_handle->close (db->db_handle);
|
|
|
551 #else
|
|
|
552 db->db_handle->sync (db->db_handle, 0);
|
|
|
553 db->db_handle->close (db->db_handle, 0);
|
|
|
554 #endif /* DB_VERSION_MAJOR */
|
|
|
555 db->db_handle = NULL;
|
|
|
556 }
|
|
|
557 }
|
|
|
558
|
|
|
559 static DB_FUNCS berk_func_block =
|
|
|
560 {
|
|
|
561 berkdb_subtype,
|
|
|
562 berkdb_type,
|
|
|
563 berkdb_get,
|
|
|
564 berkdb_put,
|
|
|
565 berkdb_remove,
|
|
|
566 berkdb_map,
|
|
|
567 berkdb_close,
|
|
|
568 berkdb_lasterr
|
|
|
569 };
|
|
|
570 #endif /* HAVE_BERKELEY_DB */
|
|
|
571
|
|
|
572 DEFUN ("database-last-error", Fdatabase_last_error, 0, 1, 0, /*
|
|
|
573 Return the last error associated with DATABASE.
|
|
|
574 */
|
|
|
575 (database))
|
|
|
576 {
|
|
|
577 if (NILP (database))
|
|
|
578 return lisp_strerror (errno);
|
|
|
579
|
|
|
580 CHECK_DATABASE (database);
|
|
|
581
|
|
|
582 return XDATABASE (database)->funcs->last_error (XDATABASE (database));
|
|
|
583 }
|
|
|
584
|
|
771
|
585 DEFUN ("open-database", Fopen_database, 1, 6, 0, /*
|
|
428
|
586 Return a new database object opened on FILE.
|
|
|
587 Optional arguments TYPE and SUBTYPE specify the database type.
|
|
|
588 Optional argument ACCESS specifies the access rights, which may be any
|
|
|
589 combination of 'r' 'w' and '+', for read, write, and creation flags.
|
|
|
590 Optional argument MODE gives the permissions to use when opening FILE,
|
|
|
591 and defaults to 0755.
|
|
771
|
592 Optional argument CODESYS specifies the coding system used to encode/decode
|
|
|
593 data passed to/from the database, and defaults to the value of the
|
|
|
594 variable `database-coding-system'.
|
|
428
|
595 */
|
|
771
|
596 (file, type, subtype, access_, mode, codesys))
|
|
428
|
597 {
|
|
|
598 /* This function can GC */
|
|
|
599 int modemask;
|
|
|
600 int accessmask = 0;
|
|
|
601 Lisp_Database *db = NULL;
|
|
|
602 char *filename;
|
|
|
603 struct gcpro gcpro1, gcpro2;
|
|
|
604
|
|
|
605 CHECK_STRING (file);
|
|
|
606 GCPRO2 (file, access_);
|
|
|
607 file = Fexpand_file_name (file, Qnil);
|
|
|
608 UNGCPRO;
|
|
|
609
|
|
440
|
610 TO_EXTERNAL_FORMAT (LISP_STRING, file,
|
|
|
611 C_STRING_ALLOCA, filename,
|
|
|
612 Qfile_name);
|
|
428
|
613
|
|
|
614 if (NILP (access_))
|
|
|
615 {
|
|
|
616 accessmask = O_RDWR | O_CREAT;
|
|
|
617 }
|
|
|
618 else
|
|
|
619 {
|
|
|
620 char *acc;
|
|
|
621 CHECK_STRING (access_);
|
|
|
622 acc = (char *) XSTRING_DATA (access_);
|
|
|
623
|
|
|
624 if (strchr (acc, '+'))
|
|
|
625 accessmask |= O_CREAT;
|
|
|
626
|
|
|
627 {
|
|
|
628 char *rp = strchr (acc, 'r');
|
|
|
629 char *wp = strchr (acc, 'w');
|
|
|
630 if (rp && wp) accessmask |= O_RDWR;
|
|
|
631 else if (wp) accessmask |= O_WRONLY;
|
|
|
632 else accessmask |= O_RDONLY;
|
|
|
633 }
|
|
|
634 }
|
|
|
635
|
|
|
636 if (NILP (mode))
|
|
|
637 {
|
|
|
638 modemask = 0755; /* rwxr-xr-x */
|
|
|
639 }
|
|
|
640 else
|
|
|
641 {
|
|
|
642 CHECK_INT (mode);
|
|
|
643 modemask = XINT (mode);
|
|
|
644 }
|
|
|
645
|
|
771
|
646 if (NILP (codesys))
|
|
|
647 codesys = Vdatabase_coding_system;
|
|
|
648
|
|
|
649 codesys = get_coding_system_for_text_file (Vdatabase_coding_system, 1);
|
|
|
650
|
|
428
|
651 #ifdef HAVE_DBM
|
|
|
652 if (NILP (type) || EQ (type, Qdbm))
|
|
|
653 {
|
|
|
654 DBM *dbase = dbm_open (filename, accessmask, modemask);
|
|
|
655 if (!dbase)
|
|
|
656 return Qnil;
|
|
|
657
|
|
|
658 db = allocate_database ();
|
|
|
659 db->dbm_handle = dbase;
|
|
|
660 db->funcs = &ndbm_func_block;
|
|
771
|
661 db->coding_system = codesys;
|
|
428
|
662 goto db_done;
|
|
|
663 }
|
|
|
664 #endif /* HAVE_DBM */
|
|
|
665
|
|
|
666 #ifdef HAVE_BERKELEY_DB
|
|
|
667 if (NILP (type) || EQ (type, Qberkeley_db))
|
|
|
668 {
|
|
|
669 DBTYPE real_subtype;
|
|
|
670 DB *dbase;
|
|
|
671 #if DB_VERSION_MAJOR != 1
|
|
|
672 int status;
|
|
|
673 #endif
|
|
|
674
|
|
|
675 if (EQ (subtype, Qhash) || NILP (subtype))
|
|
|
676 real_subtype = DB_HASH;
|
|
|
677 else if (EQ (subtype, Qbtree))
|
|
|
678 real_subtype = DB_BTREE;
|
|
|
679 else if (EQ (subtype, Qrecno))
|
|
|
680 real_subtype = DB_RECNO;
|
|
448
|
681 #if DB_VERSION_MAJOR > 2
|
|
|
682 else if (EQ (subtype, Qqueue))
|
|
|
683 real_subtype = DB_QUEUE;
|
|
|
684 #endif
|
|
428
|
685 else
|
|
563
|
686 invalid_constant ("Unsupported subtype", subtype);
|
|
428
|
687
|
|
|
688 #if DB_VERSION_MAJOR == 1
|
|
|
689 dbase = dbopen (filename, accessmask, modemask, real_subtype, NULL);
|
|
|
690 if (!dbase)
|
|
|
691 return Qnil;
|
|
|
692 #else
|
|
|
693 /* Berkeley DB Version 2 has only the accessmask DB_CREATE and DB_RDONLY,
|
|
|
694 other flags shouldn't be set */
|
|
|
695 if (NILP (access_))
|
|
|
696 accessmask = DB_CREATE;
|
|
|
697 else
|
|
|
698 {
|
|
|
699 char *acc;
|
|
|
700 CHECK_STRING (access_);
|
|
|
701 acc = (char *) XSTRING_DATA (access_);
|
|
|
702 accessmask = 0;
|
|
|
703
|
|
|
704 if (strchr (acc, '+'))
|
|
|
705 accessmask |= DB_CREATE;
|
|
|
706
|
|
|
707 if (strchr (acc, 'r') && !strchr (acc, 'w'))
|
|
|
708 accessmask |= DB_RDONLY;
|
|
|
709 }
|
|
448
|
710 #if DB_VERSION_MAJOR == 2
|
|
428
|
711 status = db_open (filename, real_subtype, accessmask,
|
|
|
712 modemask, NULL , NULL, &dbase);
|
|
|
713 if (status)
|
|
|
714 return Qnil;
|
|
448
|
715 #else
|
|
|
716 status = db_create (&dbase, NULL, 0);
|
|
|
717 if (status)
|
|
|
718 return Qnil;
|
|
1141
|
719 #if DB_VERSION_MAJOR < 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR < 1)
|
|
448
|
720 status = dbase->open (dbase, filename, NULL,
|
|
|
721 real_subtype, accessmask, modemask);
|
|
1141
|
722 #else /* DB_VERSION >= 4.1 */
|
|
1377
|
723 /* You can't use DB_AUTO_COMMIT unless you have a txn environment. */
|
|
1141
|
724 status = dbase->open (dbase, NULL, filename, NULL, real_subtype,
|
|
1377
|
725 accessmask, modemask);
|
|
1141
|
726 #endif /* DB_VERSION < 4.1 */
|
|
448
|
727 if (status)
|
|
|
728 {
|
|
|
729 dbase->close (dbase, 0);
|
|
|
730 return Qnil;
|
|
|
731 }
|
|
|
732 #endif /* DB_VERSION_MAJOR > 2 */
|
|
|
733 /* Normalize into system specific file modes. Only for printing */
|
|
|
734 accessmask = accessmask & DB_RDONLY ? O_RDONLY : O_RDWR;
|
|
428
|
735 #endif /* DB_VERSION_MAJOR */
|
|
|
736
|
|
|
737 db = allocate_database ();
|
|
|
738 db->db_handle = dbase;
|
|
|
739 db->funcs = &berk_func_block;
|
|
771
|
740 db->coding_system = codesys;
|
|
428
|
741 goto db_done;
|
|
|
742 }
|
|
|
743 #endif /* HAVE_BERKELEY_DB */
|
|
|
744
|
|
563
|
745 invalid_constant ("Unsupported database type", type);
|
|
428
|
746 return Qnil;
|
|
|
747
|
|
|
748 db_done:
|
|
|
749 db->live_p = 1;
|
|
|
750 db->fname = file;
|
|
|
751 db->mode = modemask;
|
|
|
752 db->access_ = accessmask;
|
|
|
753
|
|
793
|
754 return wrap_database (db);
|
|
428
|
755 }
|
|
|
756
|
|
|
757 DEFUN ("put-database", Fput_database, 3, 4, 0, /*
|
|
|
758 Store KEY and VALUE in DATABASE.
|
|
|
759 If optional fourth arg REPLACE is non-nil,
|
|
|
760 replace any existing entry in the database.
|
|
|
761 */
|
|
|
762 (key, value, database, replace))
|
|
|
763 {
|
|
|
764 CHECK_LIVE_DATABASE (database);
|
|
|
765 CHECK_STRING (key);
|
|
|
766 CHECK_STRING (value);
|
|
|
767 {
|
|
|
768 Lisp_Database *db = XDATABASE (database);
|
|
|
769 int status = db->funcs->put (db, key, value, replace);
|
|
|
770 return status ? Qt : Qnil;
|
|
|
771 }
|
|
|
772 }
|
|
|
773
|
|
|
774 DEFUN ("remove-database", Fremove_database, 2, 2, 0, /*
|
|
|
775 Remove KEY from DATABASE.
|
|
|
776 */
|
|
|
777 (key, database))
|
|
|
778 {
|
|
|
779 CHECK_LIVE_DATABASE (database);
|
|
|
780 CHECK_STRING (key);
|
|
|
781 {
|
|
|
782 Lisp_Database *db = XDATABASE (database);
|
|
|
783 int status = db->funcs->rem (db, key);
|
|
|
784 return status ? Qt : Qnil;
|
|
|
785 }
|
|
|
786 }
|
|
|
787
|
|
|
788 DEFUN ("get-database", Fget_database, 2, 3, 0, /*
|
|
|
789 Return value for KEY in DATABASE.
|
|
|
790 If there is no corresponding value, return DEFAULT (defaults to nil).
|
|
|
791 */
|
|
|
792 (key, database, default_))
|
|
|
793 {
|
|
|
794 CHECK_LIVE_DATABASE (database);
|
|
|
795 CHECK_STRING (key);
|
|
|
796 {
|
|
|
797 Lisp_Database *db = XDATABASE (database);
|
|
|
798 Lisp_Object retval = db->funcs->get (db, key);
|
|
|
799 return NILP (retval) ? default_ : retval;
|
|
|
800 }
|
|
|
801 }
|
|
|
802
|
|
|
803 DEFUN ("map-database", Fmapdatabase, 2, 2, 0, /*
|
|
|
804 Map FUNCTION over entries in DATABASE, calling it with two args,
|
|
|
805 each key and value in the database.
|
|
|
806 */
|
|
|
807 (function, database))
|
|
|
808 {
|
|
|
809 CHECK_LIVE_DATABASE (database);
|
|
|
810
|
|
|
811 XDATABASE (database)->funcs->map (XDATABASE (database), function);
|
|
|
812
|
|
|
813 return Qnil;
|
|
|
814 }
|
|
|
815
|
|
|
816 void
|
|
|
817 syms_of_database (void)
|
|
|
818 {
|
|
442
|
819 INIT_LRECORD_IMPLEMENTATION (database);
|
|
|
820
|
|
563
|
821 DEFSYMBOL (Qdatabasep);
|
|
428
|
822 #ifdef HAVE_DBM
|
|
563
|
823 DEFSYMBOL (Qdbm);
|
|
428
|
824 #endif
|
|
|
825 #ifdef HAVE_BERKELEY_DB
|
|
563
|
826 DEFSYMBOL (Qberkeley_db);
|
|
|
827 DEFSYMBOL (Qhash);
|
|
|
828 DEFSYMBOL (Qbtree);
|
|
|
829 DEFSYMBOL (Qrecno);
|
|
448
|
830 #if DB_VERSION_MAJOR > 2
|
|
563
|
831 DEFSYMBOL (Qqueue);
|
|
448
|
832 #endif
|
|
563
|
833 DEFSYMBOL (Qunknown);
|
|
428
|
834 #endif
|
|
|
835
|
|
|
836 DEFSUBR (Fopen_database);
|
|
|
837 DEFSUBR (Fdatabasep);
|
|
|
838 DEFSUBR (Fmapdatabase);
|
|
|
839 DEFSUBR (Fput_database);
|
|
|
840 DEFSUBR (Fget_database);
|
|
|
841 DEFSUBR (Fremove_database);
|
|
|
842 DEFSUBR (Fdatabase_type);
|
|
|
843 DEFSUBR (Fdatabase_subtype);
|
|
|
844 DEFSUBR (Fdatabase_last_error);
|
|
|
845 DEFSUBR (Fdatabase_live_p);
|
|
|
846 DEFSUBR (Fdatabase_file_name);
|
|
|
847 DEFSUBR (Fclose_database);
|
|
|
848 }
|
|
|
849
|
|
|
850 void
|
|
|
851 vars_of_database (void)
|
|
|
852 {
|
|
|
853 #ifdef HAVE_DBM
|
|
|
854 Fprovide (Qdbm);
|
|
|
855 #endif
|
|
|
856 #ifdef HAVE_BERKELEY_DB
|
|
|
857 Fprovide (Qberkeley_db);
|
|
|
858 #endif
|
|
|
859
|
|
|
860 DEFVAR_LISP ("database-coding-system", &Vdatabase_coding_system /*
|
|
771
|
861 Default coding system used to convert data in database files.
|
|
428
|
862 */ );
|
|
771
|
863 Vdatabase_coding_system = Qnative;
|
|
428
|
864 }
|
