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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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442
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56 #include DB_H_FILE /* Berkeley db's header file */
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428
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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 typedef struct
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79 {
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80 Lisp_Object (*get_subtype) (Lisp_Database *);
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81 Lisp_Object (*get_type) (Lisp_Database *);
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82 Lisp_Object (*get) (Lisp_Database *, Lisp_Object);
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83 int (*put) (Lisp_Database *, Lisp_Object, Lisp_Object, Lisp_Object);
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84 int (*rem) (Lisp_Database *, Lisp_Object);
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85 void (*map) (Lisp_Database *, Lisp_Object);
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86 void (*close) (Lisp_Database *);
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87 Lisp_Object (*last_error) (Lisp_Database *);
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88 } DB_FUNCS;
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89
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90 struct Lisp_Database
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91 {
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92 struct lcrecord_header header;
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93 Lisp_Object fname;
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94 int mode;
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95 int access_;
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96 int dberrno;
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97 int live_p;
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98 #ifdef HAVE_DBM
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99 DBM *dbm_handle;
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100 #endif
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101 #ifdef HAVE_BERKELEY_DB
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102 DB *db_handle;
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103 #endif
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104 DB_FUNCS *funcs;
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105 #ifdef MULE
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106 Lisp_Object coding_system;
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107 #endif
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108 };
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109
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110 #define XDATABASE(x) XRECORD (x, database, Lisp_Database)
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111 #define XSETDATABASE(x, p) XSETRECORD (x, p, database)
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112 #define DATABASEP(x) RECORDP (x, database)
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113 #define CHECK_DATABASE(x) CHECK_RECORD (x, database)
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114 #define CONCHECK_DATABASE(x) CONCHECK_RECORD (x, database)
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115 #define DATABASE_LIVE_P(x) (x->live_p)
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116
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117 #define CHECK_LIVE_DATABASE(db) do { \
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118 CHECK_DATABASE (db); \
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119 if (!DATABASE_LIVE_P (XDATABASE(db))) \
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120 signal_simple_error ("Attempting to access closed database", db); \
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121 } while (0)
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122
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123
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124 static Lisp_Database *
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125 allocate_database (void)
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126 {
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127 Lisp_Database *db = alloc_lcrecord_type (Lisp_Database, &lrecord_database);
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128
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129 db->fname = Qnil;
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130 db->live_p = 0;
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131 #ifdef HAVE_BERKELEY_DB
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132 db->db_handle = NULL;
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133 #endif
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134 #ifdef HAVE_DBM
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135 db->dbm_handle = NULL;
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136 #endif
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137 db->access_ = 0;
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138 db->mode = 0;
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139 db->dberrno = 0;
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140 #ifdef MULE
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141 db->coding_system = Fget_coding_system (Qbinary);
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142 #endif
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143 return db;
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144 }
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145
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146 static Lisp_Object
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147 mark_database (Lisp_Object obj)
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148 {
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149 Lisp_Database *db = XDATABASE (obj);
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150 return db->fname;
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151 }
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152
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153 static void
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154 print_database (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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155 {
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156 char buf[64];
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157 Lisp_Database *db = XDATABASE (obj);
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158
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159 if (print_readably)
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160 error ("printing unreadable object #<database 0x%x>", db->header.uid);
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161
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162 write_c_string ("#<database \"", printcharfun);
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163 print_internal (db->fname, printcharfun, 0);
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164 sprintf (buf, "\" (%s/%s/%s) 0x%x>",
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165 (char *) string_data (XSYMBOL (db->funcs->get_type (db))->name),
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166 (char *) string_data (XSYMBOL (db->funcs->get_subtype (db))->name),
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167 (!DATABASE_LIVE_P (db) ? "closed" :
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168 (db->access_ & O_WRONLY) ? "writeonly" :
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169 (db->access_ & O_RDWR) ? "readwrite" : "readonly"),
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170 db->header.uid);
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171 write_c_string (buf, printcharfun);
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172 }
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173
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174 static void
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175 finalize_database (void *header, int for_disksave)
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176 {
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177 Lisp_Database *db = (Lisp_Database *) header;
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178
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179 if (for_disksave)
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180 {
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181 Lisp_Object obj;
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182 XSETDATABASE (obj, db);
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183
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184 signal_simple_error
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185 ("Can't dump an emacs containing database objects", obj);
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186 }
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187 db->funcs->close (db);
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188 }
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189
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190 DEFINE_LRECORD_IMPLEMENTATION ("database", database,
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191 mark_database, print_database,
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192 finalize_database, 0, 0, 0,
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193 Lisp_Database);
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194
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195 DEFUN ("close-database", Fclose_database, 1, 1, 0, /*
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196 Close database DATABASE.
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197 */
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198 (database))
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199 {
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200 Lisp_Database *db;
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201 CHECK_LIVE_DATABASE (database);
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202 db = XDATABASE (database);
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203 db->funcs->close (db);
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204 db->live_p = 0;
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205 return Qnil;
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206 }
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207
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208 DEFUN ("database-type", Fdatabase_type, 1, 1, 0, /*
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209 Return the type of database DATABASE.
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210 */
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211 (database))
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212 {
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213 CHECK_DATABASE (database);
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214
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215 return XDATABASE (database)->funcs->get_type (XDATABASE (database));
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216 }
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217
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218 DEFUN ("database-subtype", Fdatabase_subtype, 1, 1, 0, /*
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219 Return the subtype of database DATABASE, if any.
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220 */
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221 (database))
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222 {
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223 CHECK_DATABASE (database);
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224
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225 return XDATABASE (database)->funcs->get_subtype (XDATABASE (database));
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226 }
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227
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228 DEFUN ("database-live-p", Fdatabase_live_p, 1, 1, 0, /*
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229 Return t if OBJ is an active database.
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230 */
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231 (obj))
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232 {
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233 return DATABASEP (obj) && DATABASE_LIVE_P (XDATABASE (obj)) ? Qt : Qnil;
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234 }
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235
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236 DEFUN ("database-file-name", Fdatabase_file_name, 1, 1, 0, /*
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237 Return the filename associated with the database DATABASE.
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238 */
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239 (database))
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240 {
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241 CHECK_DATABASE (database);
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242
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243 return XDATABASE (database)->fname;
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244 }
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245
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246 DEFUN ("databasep", Fdatabasep, 1, 1, 0, /*
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247 Return t if OBJ is a database.
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248 */
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249 (obj))
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250 {
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251 return DATABASEP (obj) ? Qt : Qnil;
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252 }
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253
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254 #ifdef HAVE_DBM
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255 static void
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256 dbm_map (Lisp_Database *db, Lisp_Object func)
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257 {
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258 datum keydatum, valdatum;
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259 Lisp_Object key, val;
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260
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261 for (keydatum = dbm_firstkey (db->dbm_handle);
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262 keydatum.dptr != NULL;
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263 keydatum = dbm_nextkey (db->dbm_handle))
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264 {
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265 valdatum = dbm_fetch (db->dbm_handle, keydatum);
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266 key = make_string ((unsigned char *) keydatum.dptr, keydatum.dsize);
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267 val = make_string ((unsigned char *) valdatum.dptr, valdatum.dsize);
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268 call2 (func, key, val);
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269 }
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270 }
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271
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272 static Lisp_Object
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273 dbm_get (Lisp_Database *db, Lisp_Object key)
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274 {
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275 datum keydatum, valdatum;
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276
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277 keydatum.dptr = (char *) XSTRING_DATA (key);
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278 keydatum.dsize = XSTRING_LENGTH (key);
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279 valdatum = dbm_fetch (db->dbm_handle, keydatum);
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280
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281 return (valdatum.dptr
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282 ? make_string ((unsigned char *) valdatum.dptr, valdatum.dsize)
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283 : Qnil);
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284 }
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285
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286 static int
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287 dbm_put (Lisp_Database *db,
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288 Lisp_Object key, Lisp_Object val, Lisp_Object replace)
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289 {
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290 datum keydatum, valdatum;
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291
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292 valdatum.dptr = (char *) XSTRING_DATA (val);
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293 valdatum.dsize = XSTRING_LENGTH (val);
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294 keydatum.dptr = (char *) XSTRING_DATA (key);
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295 keydatum.dsize = XSTRING_LENGTH (key);
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296
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297 return !dbm_store (db->dbm_handle, keydatum, valdatum,
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298 NILP (replace) ? DBM_INSERT : DBM_REPLACE);
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299 }
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300
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301 static int
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302 dbm_remove (Lisp_Database *db, Lisp_Object key)
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303 {
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304 datum keydatum;
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305
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306 keydatum.dptr = (char *) XSTRING_DATA (key);
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307 keydatum.dsize = XSTRING_LENGTH (key);
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308
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309 return dbm_delete (db->dbm_handle, keydatum);
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310 }
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311
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312 static Lisp_Object
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313 dbm_type (Lisp_Database *db)
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314 {
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315 return Qdbm;
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316 }
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317
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318 static Lisp_Object
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319 dbm_subtype (Lisp_Database *db)
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320 {
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321 return Qnil;
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322 }
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323
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324 static Lisp_Object
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325 dbm_lasterr (Lisp_Database *db)
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326 {
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327 return lisp_strerror (db->dberrno);
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328 }
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329
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330 static void
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331 dbm_closeit (Lisp_Database *db)
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332 {
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333 if (db->dbm_handle)
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334 {
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335 dbm_close (db->dbm_handle);
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336 db->dbm_handle = NULL;
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337 }
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338 }
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339
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340 static DB_FUNCS ndbm_func_block =
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341 {
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342 dbm_subtype,
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343 dbm_type,
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344 dbm_get,
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345 dbm_put,
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346 dbm_remove,
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347 dbm_map,
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348 dbm_closeit,
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349 dbm_lasterr
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350 };
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351 #endif /* HAVE_DBM */
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352
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353 #ifdef HAVE_BERKELEY_DB
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354 static Lisp_Object
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355 berkdb_type (Lisp_Database *db)
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356 {
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357 return Qberkeley_db;
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358 }
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359
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360 static Lisp_Object
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361 berkdb_subtype (Lisp_Database *db)
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362 {
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363 if (!db->db_handle)
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364 return Qnil;
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365
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366 switch (db->db_handle->type)
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367 {
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368 case DB_BTREE: return Qbtree;
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369 case DB_HASH: return Qhash;
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370 case DB_RECNO: return Qrecno;
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371 default: return Qunknown;
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372 }
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373 }
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374
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375 static Lisp_Object
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376 berkdb_lasterr (Lisp_Database *db)
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377 {
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378 return lisp_strerror (db->dberrno);
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379 }
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380
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381 static Lisp_Object
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382 berkdb_get (Lisp_Database *db, Lisp_Object key)
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383 {
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384 DBT keydatum, valdatum;
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385 int status = 0;
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386
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387 /* DB Version 2 requires DBT's to be zeroed before use. */
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388 xzero (keydatum);
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389 xzero (valdatum);
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390
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391 keydatum.data = XSTRING_DATA (key);
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392 keydatum.size = XSTRING_LENGTH (key);
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393
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394 #if DB_VERSION_MAJOR == 1
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395 status = db->db_handle->get (db->db_handle, &keydatum, &valdatum, 0);
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396 #else
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397 status = db->db_handle->get (db->db_handle, NULL, &keydatum, &valdatum, 0);
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398 #endif /* DB_VERSION_MAJOR */
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399
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400 if (!status)
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401 /* #### Not mule-ized! will crash! */
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402 return make_string ((Bufbyte *) valdatum.data, valdatum.size);
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403
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404 #if DB_VERSION_MAJOR == 1
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405 db->dberrno = (status == 1) ? -1 : errno;
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406 #else
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407 db->dberrno = (status < 0) ? -1 : errno;
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408 #endif /* DB_VERSION_MAJOR */
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409
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410 return Qnil;
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411 }
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412
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413 static int
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414 berkdb_put (Lisp_Database *db,
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|
|
415 Lisp_Object key,
|
|
|
416 Lisp_Object val,
|
|
|
417 Lisp_Object replace)
|
|
|
418 {
|
|
|
419 DBT keydatum, valdatum;
|
|
|
420 int status = 0;
|
|
|
421
|
|
|
422 /* DB Version 2 requires DBT's to be zeroed before use. */
|
|
|
423 xzero (keydatum);
|
|
|
424 xzero (valdatum);
|
|
|
425
|
|
|
426 keydatum.data = XSTRING_DATA (key);
|
|
|
427 keydatum.size = XSTRING_LENGTH (key);
|
|
|
428 valdatum.data = XSTRING_DATA (val);
|
|
|
429 valdatum.size = XSTRING_LENGTH (val);
|
|
|
430 #if DB_VERSION_MAJOR == 1
|
|
|
431 status = db->db_handle->put (db->db_handle, &keydatum, &valdatum,
|
|
|
432 NILP (replace) ? R_NOOVERWRITE : 0);
|
|
|
433 db->dberrno = (status == 1) ? -1 : errno;
|
|
|
434 #else
|
|
|
435 status = db->db_handle->put (db->db_handle, NULL, &keydatum, &valdatum,
|
|
|
436 NILP (replace) ? DB_NOOVERWRITE : 0);
|
|
|
437 db->dberrno = (status < 0) ? -1 : errno;
|
|
|
438 #endif/* DV_VERSION_MAJOR = 2 */
|
|
|
439
|
|
|
440 return status;
|
|
|
441 }
|
|
|
442
|
|
|
443 static int
|
|
|
444 berkdb_remove (Lisp_Database *db, Lisp_Object key)
|
|
|
445 {
|
|
|
446 DBT keydatum;
|
|
|
447 int status;
|
|
|
448
|
|
|
449 /* DB Version 2 requires DBT's to be zeroed before use. */
|
|
|
450 xzero (keydatum);
|
|
|
451
|
|
|
452 keydatum.data = XSTRING_DATA (key);
|
|
|
453 keydatum.size = XSTRING_LENGTH (key);
|
|
|
454
|
|
|
455 #if DB_VERSION_MAJOR == 1
|
|
|
456 status = db->db_handle->del (db->db_handle, &keydatum, 0);
|
|
|
457 #else
|
|
|
458 status = db->db_handle->del (db->db_handle, NULL, &keydatum, 0);
|
|
|
459 #endif /* DB_VERSION_MAJOR */
|
|
|
460
|
|
|
461 if (!status)
|
|
|
462 return 0;
|
|
|
463
|
|
|
464 #if DB_VERSION_MAJOR == 1
|
|
|
465 db->dberrno = (status == 1) ? -1 : errno;
|
|
|
466 #else
|
|
|
467 db->dberrno = (status < 0) ? -1 : errno;
|
|
|
468 #endif /* DB_VERSION_MAJOR */
|
|
|
469
|
|
|
470 return 1;
|
|
|
471 }
|
|
|
472
|
|
|
473 static void
|
|
|
474 berkdb_map (Lisp_Database *db, Lisp_Object func)
|
|
|
475 {
|
|
|
476 DBT keydatum, valdatum;
|
|
|
477 Lisp_Object key, val;
|
|
|
478 DB *dbp = db->db_handle;
|
|
|
479 int status;
|
|
|
480
|
|
|
481 xzero (keydatum);
|
|
|
482 xzero (valdatum);
|
|
|
483
|
|
|
484 #if DB_VERSION_MAJOR == 1
|
|
|
485 for (status = dbp->seq (dbp, &keydatum, &valdatum, R_FIRST);
|
|
|
486 status == 0;
|
|
|
487 status = dbp->seq (dbp, &keydatum, &valdatum, R_NEXT))
|
|
|
488 {
|
|
440
|
489 /* #### Needs mule-izing */
|
|
428
|
490 key = make_string ((Bufbyte *) keydatum.data, keydatum.size);
|
|
|
491 val = make_string ((Bufbyte *) valdatum.data, valdatum.size);
|
|
|
492 call2 (func, key, val);
|
|
|
493 }
|
|
|
494 #else
|
|
|
495 {
|
|
|
496 DBC *dbcp;
|
|
|
497
|
|
|
498 #if DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >=6
|
|
|
499 status = dbp->cursor (dbp, NULL, &dbcp, 0);
|
|
|
500 #else
|
|
|
501 status = dbp->cursor (dbp, NULL, &dbcp);
|
|
440
|
502 #endif
|
|
428
|
503 for (status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_FIRST);
|
|
|
504 status == 0;
|
|
|
505 status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_NEXT))
|
|
|
506 {
|
|
440
|
507 /* #### Needs mule-izing */
|
|
428
|
508 key = make_string ((Bufbyte *) keydatum.data, keydatum.size);
|
|
|
509 val = make_string ((Bufbyte *) valdatum.data, valdatum.size);
|
|
|
510 call2 (func, key, val);
|
|
|
511 }
|
|
|
512 dbcp->c_close (dbcp);
|
|
|
513 }
|
|
|
514 #endif /* DB_VERSION_MAJOR */
|
|
|
515 }
|
|
|
516
|
|
|
517 static void
|
|
|
518 berkdb_close (Lisp_Database *db)
|
|
|
519 {
|
|
|
520 if (db->db_handle)
|
|
|
521 {
|
|
|
522 #if DB_VERSION_MAJOR == 1
|
|
|
523 db->db_handle->sync (db->db_handle, 0);
|
|
|
524 db->db_handle->close (db->db_handle);
|
|
|
525 #else
|
|
|
526 db->db_handle->sync (db->db_handle, 0);
|
|
|
527 db->db_handle->close (db->db_handle, 0);
|
|
|
528 #endif /* DB_VERSION_MAJOR */
|
|
|
529 db->db_handle = NULL;
|
|
|
530 }
|
|
|
531 }
|
|
|
532
|
|
|
533 static DB_FUNCS berk_func_block =
|
|
|
534 {
|
|
|
535 berkdb_subtype,
|
|
|
536 berkdb_type,
|
|
|
537 berkdb_get,
|
|
|
538 berkdb_put,
|
|
|
539 berkdb_remove,
|
|
|
540 berkdb_map,
|
|
|
541 berkdb_close,
|
|
|
542 berkdb_lasterr
|
|
|
543 };
|
|
|
544 #endif /* HAVE_BERKELEY_DB */
|
|
|
545
|
|
|
546 DEFUN ("database-last-error", Fdatabase_last_error, 0, 1, 0, /*
|
|
|
547 Return the last error associated with DATABASE.
|
|
|
548 */
|
|
|
549 (database))
|
|
|
550 {
|
|
|
551 if (NILP (database))
|
|
|
552 return lisp_strerror (errno);
|
|
|
553
|
|
|
554 CHECK_DATABASE (database);
|
|
|
555
|
|
|
556 return XDATABASE (database)->funcs->last_error (XDATABASE (database));
|
|
|
557 }
|
|
|
558
|
|
|
559 DEFUN ("open-database", Fopen_database, 1, 5, 0, /*
|
|
|
560 Return a new database object opened on FILE.
|
|
|
561 Optional arguments TYPE and SUBTYPE specify the database type.
|
|
|
562 Optional argument ACCESS specifies the access rights, which may be any
|
|
|
563 combination of 'r' 'w' and '+', for read, write, and creation flags.
|
|
|
564 Optional argument MODE gives the permissions to use when opening FILE,
|
|
|
565 and defaults to 0755.
|
|
|
566 */
|
|
|
567 (file, type, subtype, access_, mode))
|
|
|
568 {
|
|
|
569 /* This function can GC */
|
|
|
570 int modemask;
|
|
|
571 int accessmask = 0;
|
|
|
572 Lisp_Database *db = NULL;
|
|
|
573 char *filename;
|
|
|
574 struct gcpro gcpro1, gcpro2;
|
|
|
575
|
|
|
576 CHECK_STRING (file);
|
|
|
577 GCPRO2 (file, access_);
|
|
|
578 file = Fexpand_file_name (file, Qnil);
|
|
|
579 UNGCPRO;
|
|
|
580
|
|
440
|
581 TO_EXTERNAL_FORMAT (LISP_STRING, file,
|
|
|
582 C_STRING_ALLOCA, filename,
|
|
|
583 Qfile_name);
|
|
428
|
584
|
|
|
585 if (NILP (access_))
|
|
|
586 {
|
|
|
587 accessmask = O_RDWR | O_CREAT;
|
|
|
588 }
|
|
|
589 else
|
|
|
590 {
|
|
|
591 char *acc;
|
|
|
592 CHECK_STRING (access_);
|
|
|
593 acc = (char *) XSTRING_DATA (access_);
|
|
|
594
|
|
|
595 if (strchr (acc, '+'))
|
|
|
596 accessmask |= O_CREAT;
|
|
|
597
|
|
|
598 {
|
|
|
599 char *rp = strchr (acc, 'r');
|
|
|
600 char *wp = strchr (acc, 'w');
|
|
|
601 if (rp && wp) accessmask |= O_RDWR;
|
|
|
602 else if (wp) accessmask |= O_WRONLY;
|
|
|
603 else accessmask |= O_RDONLY;
|
|
|
604 }
|
|
|
605 }
|
|
|
606
|
|
|
607 if (NILP (mode))
|
|
|
608 {
|
|
|
609 modemask = 0755; /* rwxr-xr-x */
|
|
|
610 }
|
|
|
611 else
|
|
|
612 {
|
|
|
613 CHECK_INT (mode);
|
|
|
614 modemask = XINT (mode);
|
|
|
615 }
|
|
|
616
|
|
|
617 #ifdef HAVE_DBM
|
|
|
618 if (NILP (type) || EQ (type, Qdbm))
|
|
|
619 {
|
|
|
620 DBM *dbase = dbm_open (filename, accessmask, modemask);
|
|
|
621 if (!dbase)
|
|
|
622 return Qnil;
|
|
|
623
|
|
|
624 db = allocate_database ();
|
|
|
625 db->dbm_handle = dbase;
|
|
|
626 db->funcs = &ndbm_func_block;
|
|
|
627 goto db_done;
|
|
|
628 }
|
|
|
629 #endif /* HAVE_DBM */
|
|
|
630
|
|
|
631 #ifdef HAVE_BERKELEY_DB
|
|
|
632 if (NILP (type) || EQ (type, Qberkeley_db))
|
|
|
633 {
|
|
|
634 DBTYPE real_subtype;
|
|
|
635 DB *dbase;
|
|
|
636 #if DB_VERSION_MAJOR != 1
|
|
|
637 int status;
|
|
|
638 #endif
|
|
|
639
|
|
|
640 if (EQ (subtype, Qhash) || NILP (subtype))
|
|
|
641 real_subtype = DB_HASH;
|
|
|
642 else if (EQ (subtype, Qbtree))
|
|
|
643 real_subtype = DB_BTREE;
|
|
|
644 else if (EQ (subtype, Qrecno))
|
|
|
645 real_subtype = DB_RECNO;
|
|
|
646 else
|
|
|
647 signal_simple_error ("Unsupported subtype", subtype);
|
|
|
648
|
|
|
649 #if DB_VERSION_MAJOR == 1
|
|
|
650 dbase = dbopen (filename, accessmask, modemask, real_subtype, NULL);
|
|
|
651 if (!dbase)
|
|
|
652 return Qnil;
|
|
|
653 #else
|
|
|
654 /* Berkeley DB Version 2 has only the accessmask DB_CREATE and DB_RDONLY,
|
|
|
655 other flags shouldn't be set */
|
|
|
656 if (NILP (access_))
|
|
|
657 accessmask = DB_CREATE;
|
|
|
658 else
|
|
|
659 {
|
|
|
660 char *acc;
|
|
|
661 CHECK_STRING (access_);
|
|
|
662 acc = (char *) XSTRING_DATA (access_);
|
|
|
663 accessmask = 0;
|
|
|
664
|
|
|
665 if (strchr (acc, '+'))
|
|
|
666 accessmask |= DB_CREATE;
|
|
|
667
|
|
|
668 if (strchr (acc, 'r') && !strchr (acc, 'w'))
|
|
|
669 accessmask |= DB_RDONLY;
|
|
|
670 }
|
|
|
671 status = db_open (filename, real_subtype, accessmask,
|
|
|
672 modemask, NULL , NULL, &dbase);
|
|
|
673 if (status)
|
|
|
674 return Qnil;
|
|
|
675 #endif /* DB_VERSION_MAJOR */
|
|
|
676
|
|
|
677 db = allocate_database ();
|
|
|
678 db->db_handle = dbase;
|
|
|
679 db->funcs = &berk_func_block;
|
|
|
680 goto db_done;
|
|
|
681 }
|
|
|
682 #endif /* HAVE_BERKELEY_DB */
|
|
|
683
|
|
|
684 signal_simple_error ("Unsupported database type", type);
|
|
|
685 return Qnil;
|
|
|
686
|
|
|
687 db_done:
|
|
|
688 db->live_p = 1;
|
|
|
689 db->fname = file;
|
|
|
690 db->mode = modemask;
|
|
|
691 db->access_ = accessmask;
|
|
|
692
|
|
|
693 {
|
|
|
694 Lisp_Object retval;
|
|
|
695 XSETDATABASE (retval, db);
|
|
|
696 return retval;
|
|
|
697 }
|
|
|
698 }
|
|
|
699
|
|
|
700 DEFUN ("put-database", Fput_database, 3, 4, 0, /*
|
|
|
701 Store KEY and VALUE in DATABASE.
|
|
|
702 If optional fourth arg REPLACE is non-nil,
|
|
|
703 replace any existing entry in the database.
|
|
|
704 */
|
|
|
705 (key, value, database, replace))
|
|
|
706 {
|
|
|
707 CHECK_LIVE_DATABASE (database);
|
|
|
708 CHECK_STRING (key);
|
|
|
709 CHECK_STRING (value);
|
|
|
710 {
|
|
|
711 Lisp_Database *db = XDATABASE (database);
|
|
|
712 int status = db->funcs->put (db, key, value, replace);
|
|
|
713 return status ? Qt : Qnil;
|
|
|
714 }
|
|
|
715 }
|
|
|
716
|
|
|
717 DEFUN ("remove-database", Fremove_database, 2, 2, 0, /*
|
|
|
718 Remove KEY from DATABASE.
|
|
|
719 */
|
|
|
720 (key, database))
|
|
|
721 {
|
|
|
722 CHECK_LIVE_DATABASE (database);
|
|
|
723 CHECK_STRING (key);
|
|
|
724 {
|
|
|
725 Lisp_Database *db = XDATABASE (database);
|
|
|
726 int status = db->funcs->rem (db, key);
|
|
|
727 return status ? Qt : Qnil;
|
|
|
728 }
|
|
|
729 }
|
|
|
730
|
|
|
731 DEFUN ("get-database", Fget_database, 2, 3, 0, /*
|
|
|
732 Return value for KEY in DATABASE.
|
|
|
733 If there is no corresponding value, return DEFAULT (defaults to nil).
|
|
|
734 */
|
|
|
735 (key, database, default_))
|
|
|
736 {
|
|
|
737 CHECK_LIVE_DATABASE (database);
|
|
|
738 CHECK_STRING (key);
|
|
|
739 {
|
|
|
740 Lisp_Database *db = XDATABASE (database);
|
|
|
741 Lisp_Object retval = db->funcs->get (db, key);
|
|
|
742 return NILP (retval) ? default_ : retval;
|
|
|
743 }
|
|
|
744 }
|
|
|
745
|
|
|
746 DEFUN ("map-database", Fmapdatabase, 2, 2, 0, /*
|
|
|
747 Map FUNCTION over entries in DATABASE, calling it with two args,
|
|
|
748 each key and value in the database.
|
|
|
749 */
|
|
|
750 (function, database))
|
|
|
751 {
|
|
|
752 CHECK_LIVE_DATABASE (database);
|
|
|
753
|
|
|
754 XDATABASE (database)->funcs->map (XDATABASE (database), function);
|
|
|
755
|
|
|
756 return Qnil;
|
|
|
757 }
|
|
|
758
|
|
|
759 void
|
|
|
760 syms_of_database (void)
|
|
|
761 {
|
|
442
|
762 INIT_LRECORD_IMPLEMENTATION (database);
|
|
|
763
|
|
428
|
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 }
|
