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