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0
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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
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25 #include <config.h>
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26 #include "lisp.h"
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27 #include <errno.h>
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28
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29 #ifdef HAVE_DATABASE
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30 #include <database.h> /* Our include file */
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31 #ifdef HAVE_BERKELEY_DB
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32 #include <db.h> /* Berkeley db access */
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33 #endif
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34 #ifdef HAVE_DBM
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35 #include <ndbm.h>
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36 #endif
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37
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38 Lisp_Object Qdatabasep;
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39 #ifdef HAVE_DBM
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40 Lisp_Object Qdbm;
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41 #endif
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42 #ifdef HAVE_BERKELEY_DB
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43 Lisp_Object Qberkeley_db;
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44 Lisp_Object Qhash;
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45 Lisp_Object Qbtree;
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46 Lisp_Object Qrecno;
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47 #endif
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48
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49 typedef enum { DB_DBM, DB_BERKELEY, DB_UNKNOWN } XEMACS_DB_TYPE;
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50
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51 struct database_struct;
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52
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53 typedef struct _DB_FUNCS
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54 {
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55 CONST char * (*get_subtype) (struct database_struct *);
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56 CONST char * (*get_type) (struct database_struct *);
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57 void * (*open_file) (CONST char *, Lisp_Object, int, int);
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58 Lisp_Object (*get) (struct database_struct *, Lisp_Object);
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59 int (*put) (struct database_struct *, Lisp_Object, Lisp_Object, Lisp_Object);
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60 int (*rem) (struct database_struct *, Lisp_Object);
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61 void (*map) (struct database_struct *, Lisp_Object);
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62 Lisp_Object (*get_lisp_type) (struct database_struct *);
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63 void (*close) (struct database_struct *);
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64 Lisp_Object (*last_error) (struct database_struct *);
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65 } DB_FUNCS;
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66
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67 struct database_struct
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68 {
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69 struct lcrecord_header header;
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70 Lisp_Object fname;
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71 XEMACS_DB_TYPE type;
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72 int mode;
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73 int ackcess;
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20
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74 int dberrno;
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0
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75 void *db_handle;
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76 DB_FUNCS *funcs;
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77 };
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78
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79 #define XDATABASE(x) XRECORD (x, database, struct database_struct)
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80 #define XSETDATABASE(x, p) XSETRECORD (x, p, database)
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81 #define DATABASEP(x) RECORDP (x, database)
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82 #define GC_DATABASEP(x) GC_RECORDP (x, database)
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83 #define CHECK_DATABASE(x) CHECK_RECORD (x, database)
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84 #define DATABASE_LIVE_P(x) (x->db_handle)
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85 static Lisp_Object mark_database (Lisp_Object, void (*) (Lisp_Object));
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86 static void print_database (Lisp_Object, Lisp_Object, int);
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87 static void finalize_database (void *, int);
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88 DEFINE_LRECORD_IMPLEMENTATION ("database", database,
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89 mark_database, print_database,
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90 finalize_database, 0, 0,
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91 struct database_struct);
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92
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93 static struct database_struct *
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94 new_database (void)
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95 {
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96 struct database_struct *dbase
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97 = alloc_lcrecord (sizeof (struct database_struct), lrecord_database);
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98
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99 dbase->fname = Qnil;
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100 dbase->db_handle = NULL;
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101 dbase->ackcess = 0;
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102 dbase->mode = 0;
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20
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103 dbase->dberrno = 0;
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0
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104 dbase->type = DB_UNKNOWN;
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105 return (dbase);
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106 }
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107
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108 static Lisp_Object
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109 mark_database (Lisp_Object obj, void (*markobj) (Lisp_Object))
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110 {
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111 struct database_struct *dbase = XDATABASE (obj);
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112
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113 ((markobj) (dbase->fname));
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114 return (Qnil);
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115 }
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116
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117 static void
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118 print_database (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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119 {
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120 struct database_struct *dbase = XDATABASE (obj);
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121 char buf[200];
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122
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123 if (print_readably)
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124 {
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125 error ("printing unreadable object #<database 0x%x>", dbase->header.uid);
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126 }
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127 else
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128 {
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129 CONST char *type;
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130 CONST char *subtype;
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131 CONST char *perms;
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132
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133 perms = (!dbase->db_handle) ? "closed" :
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134 (dbase->ackcess & O_WRONLY) ? "writeonly" :
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135 (dbase->ackcess & O_RDWR) ? "readwrite" : "readonly";
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136
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137 type = dbase->funcs->get_type (dbase);
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138 subtype = dbase->funcs->get_subtype (dbase);
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139
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140 sprintf (buf, "#<database %s (%s/%s/%s) 0x%x>",
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14
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141 XSTRING_DATA (dbase->fname), type, subtype, perms,
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0
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142 dbase->header.uid);
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143 write_c_string (buf, printcharfun);
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144 }
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145 }
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146
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147 static void
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148 finalize_database (void *header, int for_disksave)
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149 {
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150 struct database_struct *db = (struct database_struct *) header;
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151
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152 if (for_disksave)
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153 {
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154 Lisp_Object obj;
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155 XSETOBJ (obj, Lisp_Record, (void *) db);
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156
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157 signal_simple_error
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158 ("Can't dump an emacs containing window system objects", obj);
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159 }
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160 db->funcs->close (db);
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161 }
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162
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20
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163 DEFUN ("close-database", Fdatabase_close, 1, 1, 0, /*
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0
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164 Close database OBJ.
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20
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165 */
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166 (obj))
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0
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167 {
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168 struct database_struct *db;
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169 CHECK_DATABASE (obj);
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170 db = XDATABASE (obj);
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171
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172 if (DATABASE_LIVE_P (db))
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173 db->funcs->close (db);
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174 else
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175 signal_simple_error ("Attempting to access closed database", obj);
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176
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177 return (Qnil);
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178 }
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179
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20
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180 DEFUN ("database-type", Fdatabase_type, 1, 1, 0, /*
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181 Return the type of database OBJ.
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20
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182 */
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183 (obj))
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0
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184 {
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185 struct database_struct *db;
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186 CHECK_DATABASE (obj);
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187 db = XDATABASE (obj);
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188
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189 return db->funcs->get_lisp_type (db);
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190 }
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191
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20
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192 DEFUN ("database-subtype", Fdatabase_subtype, 1, 1, 0, /*
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193 Return the subtype of database OBJ, if any.
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20
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194 */
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195 (obj))
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0
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196 {
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197 struct database_struct *db;
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198
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199 CHECK_DATABASE (obj);
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200 db = XDATABASE (obj);
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201
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202 return (intern (db->funcs->get_subtype (db)));
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203 }
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204
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20
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205 DEFUN ("database-live-p", Fdatabase_live_p, 1, 1, 0, /*
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0
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206 Return t iff OBJ is an active database, else nil.
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20
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207 */
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208 (obj))
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0
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209 {
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210 struct database_struct *db;
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211 CHECK_DATABASE (obj);
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212 db = XDATABASE (obj);
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213
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214 return (DATABASE_LIVE_P (db) ? Qt : Qnil);
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215 }
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216
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20
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217 DEFUN ("database-file-name", Fdatabase_file_name, 1, 1, 0, /*
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218 Return the filename associated with the database OBJ.
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20
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219 */
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220 (obj))
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0
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221 {
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222 struct database_struct *db;
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223 CHECK_DATABASE (obj);
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224 db = XDATABASE (obj);
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225 return (db->fname);
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226 }
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227
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20
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228 DEFUN ("databasep", Fdatabasep, 1, 1, 0, /*
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229 Return t iff OBJ is a database, else nil.
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20
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230 */
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231 (obj))
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0
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232 {
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233 return ((DATABASEP (obj)) ? Qt : Qnil);
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234 }
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235
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236 #ifdef HAVE_DBM
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237 static void
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238 dbm_map (struct database_struct *db, Lisp_Object func)
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239 {
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240 datum keydatum, valdatum;
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241 DBM *handle = (DBM *)db->db_handle;
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242 Lisp_Object key, val;
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243
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244 for (keydatum = dbm_firstkey (handle);
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245 keydatum.dptr != NULL;
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246 keydatum = dbm_nextkey (handle))
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247 {
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248 valdatum = dbm_fetch (handle, keydatum);
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249 key = make_string ((unsigned char *) keydatum.dptr, keydatum.dsize);
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250 val = make_string ((unsigned char *) valdatum.dptr, valdatum.dsize);
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251 call2 (func, key, val);
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252 }
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253 }
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254
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255 static Lisp_Object
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256 dbm_get (struct database_struct *db, Lisp_Object key)
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257 {
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258 datum keydatum, valdatum;
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259 DBM *handle = (DBM *)db->db_handle;
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14
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260 keydatum.dptr = (char *) XSTRING_DATA (key);
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261 keydatum.dsize = XSTRING_LENGTH (key);
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0
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262 valdatum = dbm_fetch (handle, keydatum);
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263
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264 return (valdatum.dptr
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265 ? make_string ((unsigned char *) valdatum.dptr, valdatum.dsize)
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266 : Qnil);
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267 }
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268
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269 static int
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270 dbm_put (struct database_struct *db,
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271 Lisp_Object key,
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272 Lisp_Object val,
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273 Lisp_Object replace)
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274 {
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275 DBM *handle = (DBM *)db->db_handle;
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276 datum keydatum, valdatum;
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277
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14
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278 valdatum.dptr = (char *) XSTRING_DATA (val);
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279 valdatum.dsize = XSTRING_LENGTH (val);
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280 keydatum.dptr = (char *) XSTRING_DATA (key);
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281 keydatum.dsize = XSTRING_LENGTH (key);
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0
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282
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283 return (!dbm_store (handle, keydatum, valdatum,
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284 (NILP (replace)) ? DBM_INSERT : DBM_REPLACE));
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285 }
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286
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287 static int
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288 dbm_remove (struct database_struct *db, Lisp_Object key)
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289 {
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290 datum keydatum;
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14
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291 keydatum.dptr = (char *) XSTRING_DATA (key);
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292 keydatum.dsize = XSTRING_LENGTH (key);
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0
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293 return (dbm_delete (db->db_handle, keydatum));
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294 }
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295
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296 static Lisp_Object
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297 dbm_lisp_type (struct database_struct *db)
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298 {
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299 return (Qdbm);
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300 }
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301
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302 static CONST char *
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303 dbm_type (struct database_struct *db)
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304 {
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305 return ("dbm");
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306 }
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307
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308 static CONST char *
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309 dbm_subtype (struct database_struct *db)
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310 {
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311 return ("nil");
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312 }
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313
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314 static void *
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315 new_dbm_file (CONST char *file, Lisp_Object subtype, int ackcess, int mode)
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316 {
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317 DBM *db = NULL;
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318 db = dbm_open ((char *) file, ackcess, mode);
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319 return (void *) db;
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320 }
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321
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322 static Lisp_Object
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323 dbm_lasterr (struct database_struct *dbp)
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324 {
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20
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325 char *temp = strerror (dbp->dberrno);
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0
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326 return (make_string ((unsigned char *) temp, strlen (temp)));
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327 }
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328
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329 static void
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330 dbm_closeit (struct database_struct *db)
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331 {
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332 if (db->db_handle)
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333 dbm_close ((DBM *)db->db_handle);
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334 db->db_handle = NULL;
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335 }
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336
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337 static DB_FUNCS ndbm_func_block =
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338 {
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339 dbm_subtype,
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340 dbm_type,
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341 new_dbm_file,
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342 dbm_get,
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343 dbm_put,
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344 dbm_remove,
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345 dbm_map,
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346 dbm_lisp_type,
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347 dbm_closeit,
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348 dbm_lasterr
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349 };
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350 #endif
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351
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352 #ifdef HAVE_BERKELEY_DB
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353 static Lisp_Object
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354 berkdb_lisp_type (struct database_struct *db)
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355 {
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356 return (Qberkeley_db);
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357 }
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358
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359 static CONST char *
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360 berkdb_type (struct database_struct *db)
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361 {
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362 return ("berkeley");
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363 }
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364
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365 static CONST char *
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366 berkdb_subtype (struct database_struct *db)
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367 {
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368 DB *temp = (DB *)db->db_handle;
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369
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370 if (!temp)
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371 return ("nil");
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372
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373 switch (temp->type)
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374 {
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375 case DB_BTREE:
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376 return ("btree");
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377 case DB_HASH:
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378 return ("hash");
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379 case DB_RECNO:
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380 return ("recno");
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381 }
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382 return ("unknown");
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383 }
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384
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385 static void *
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386 berkdb_open (CONST char *file, Lisp_Object subtype, int ackcess, int mode)
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387 {
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388 DB *db;
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389 DBTYPE real_subtype;
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390
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391 if (EQ (subtype, Qhash) || NILP (subtype))
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392 real_subtype = DB_HASH;
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393 else if (EQ (subtype, Qbtree))
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394 real_subtype = DB_BTREE;
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395 else if (EQ (subtype, Qrecno))
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396 real_subtype = DB_RECNO;
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397 else
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398 signal_simple_error ("Unsupported subtype", subtype);
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399
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400 db = dbopen (file, ackcess, mode, real_subtype, NULL);
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401
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402 return (void *) db;
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403 }
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404
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405 static Lisp_Object
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406 berkdb_lasterr (struct database_struct *dbp)
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407 {
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20
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408 char *temp = strerror (dbp->dberrno);
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0
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409 return (make_string ((unsigned char *) temp, strlen (temp)));
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410 }
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411
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412 static Lisp_Object
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413 berkdb_get (struct database_struct *db, Lisp_Object key)
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414 {
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415 DBT keydatum, valdatum;
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416 DB *dbp = (DB *) db->db_handle;
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417 int status = 0;
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418
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14
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419 keydatum.data = XSTRING_DATA (key);
|
|
|
420 keydatum.size = XSTRING_LENGTH (key);
|
|
0
|
421
|
|
|
422 status = dbp->get (dbp, &keydatum, &valdatum, 0);
|
|
|
423
|
|
|
424 if (!status)
|
|
|
425 return (make_string (valdatum.data, valdatum.size));
|
|
|
426
|
|
20
|
427 db->dberrno = (status == 1) ? -1 : errno;
|
|
0
|
428 return (Qnil);
|
|
|
429 }
|
|
|
430
|
|
|
431 static int
|
|
|
432 berkdb_put (struct database_struct *db,
|
|
|
433 Lisp_Object key,
|
|
|
434 Lisp_Object val,
|
|
|
435 Lisp_Object replace)
|
|
|
436 {
|
|
|
437 DBT keydatum, valdatum;
|
|
|
438 DB *dbp = (DB *) db->db_handle;
|
|
|
439 int status = 0;
|
|
|
440
|
|
14
|
441 keydatum.data = XSTRING_DATA (key);
|
|
|
442 keydatum.size = XSTRING_LENGTH (key);
|
|
|
443 valdatum.data = XSTRING_DATA (val);
|
|
|
444 valdatum.size = XSTRING_LENGTH (val);
|
|
0
|
445 status = dbp->put (dbp, &keydatum, &valdatum, NILP (replace)
|
|
|
446 ? R_NOOVERWRITE : 0);
|
|
20
|
447 db->dberrno = (status == 1) ? -1 : errno;
|
|
0
|
448 return status;
|
|
|
449 }
|
|
|
450
|
|
|
451 static int
|
|
|
452 berkdb_remove (struct database_struct *db, Lisp_Object key)
|
|
|
453 {
|
|
|
454 DBT keydatum;
|
|
|
455 DB *dbp = (DB *) db->db_handle;
|
|
|
456 int status;
|
|
|
457
|
|
14
|
458 keydatum.data = XSTRING_DATA (key);
|
|
|
459 keydatum.size = XSTRING_LENGTH (key);
|
|
0
|
460
|
|
|
461 status = dbp->del (dbp, &keydatum, 0);
|
|
|
462 if (!status)
|
|
|
463 return 0;
|
|
|
464
|
|
20
|
465 db->dberrno = (status == 1) ? -1 : errno;
|
|
0
|
466 return 1;
|
|
|
467 }
|
|
|
468
|
|
|
469 static void
|
|
|
470 berkdb_map (struct database_struct *db, Lisp_Object func)
|
|
|
471 {
|
|
|
472 DBT keydatum, valdatum;
|
|
|
473 Lisp_Object key, val;
|
|
|
474 DB *dbp = (DB *) db->db_handle;
|
|
|
475 int status;
|
|
|
476
|
|
|
477 for (status = dbp->seq (dbp, &keydatum, &valdatum, R_FIRST);
|
|
|
478 status == 0;
|
|
|
479 status = dbp->seq (dbp, &keydatum, &valdatum, R_NEXT))
|
|
|
480 {
|
|
|
481 key = make_string (keydatum.data, keydatum.size);
|
|
|
482 val = make_string (valdatum.data, valdatum.size);
|
|
|
483 call2 (func, key, val);
|
|
|
484 }
|
|
|
485 }
|
|
|
486
|
|
|
487 static void
|
|
|
488 berkdb_close (struct database_struct *db)
|
|
|
489 {
|
|
|
490 DB *dbp = (DB *)db->db_handle;
|
|
|
491 if (dbp)
|
|
|
492 {
|
|
|
493 dbp->sync (dbp, 0);
|
|
|
494 dbp->close (dbp);
|
|
|
495 }
|
|
|
496 db->db_handle = NULL;
|
|
|
497 }
|
|
|
498
|
|
|
499 static DB_FUNCS berk_func_block =
|
|
|
500 {
|
|
|
501 berkdb_subtype,
|
|
|
502 berkdb_type,
|
|
|
503 berkdb_open,
|
|
|
504 berkdb_get,
|
|
|
505 berkdb_put,
|
|
|
506 berkdb_remove,
|
|
|
507 berkdb_map,
|
|
|
508 berkdb_lisp_type,
|
|
|
509 berkdb_close,
|
|
|
510 berkdb_lasterr
|
|
|
511 };
|
|
|
512 #endif
|
|
|
513
|
|
20
|
514 DEFUN ("database-last-error", Fdatabase_error, 0, 1, 0, /*
|
|
0
|
515 Return the last error associated with database OBJ.
|
|
20
|
516 */
|
|
|
517 (obj))
|
|
0
|
518 {
|
|
|
519 struct database_struct *db;
|
|
|
520
|
|
|
521 if (NILP (obj))
|
|
|
522 {
|
|
|
523 char *temp = strerror (errno);
|
|
|
524 return (make_string ((unsigned char *) temp, strlen (temp)));
|
|
|
525 }
|
|
|
526
|
|
|
527 CHECK_DATABASE (obj);
|
|
|
528 db = XDATABASE (obj);
|
|
|
529 return (db->funcs->last_error (db));
|
|
|
530 }
|
|
|
531
|
|
20
|
532 DEFUN ("open-database", Fmake_database, 1, 5, 0, /*
|
|
0
|
533 Open database FILE, using database method TYPE and SUBTYPE, with
|
|
|
534 access rights ACCESS and permissions MODE. ACCESS can be any
|
|
|
535 combination of 'r' 'w' and '+', for read, write, and creation flags.
|
|
20
|
536 */
|
|
|
537 (file, type, subtype, ackcess, mode))
|
|
0
|
538 {
|
|
|
539 Lisp_Object retval = Qnil;
|
|
|
540 int modemask;
|
|
|
541 int accessmask = 0;
|
|
|
542 XEMACS_DB_TYPE the_type;
|
|
|
543 DB_FUNCS *funcblock;
|
|
|
544 struct database_struct *dbase = NULL;
|
|
|
545 void *db = NULL;
|
|
48
|
546 struct gcpro gcpro1;
|
|
0
|
547
|
|
48
|
548 GCPRO1 (file);
|
|
|
549 file = Fexpand_file_name (file, Qnil);
|
|
0
|
550
|
|
|
551 if (NILP (ackcess))
|
|
|
552 {
|
|
|
553 accessmask = O_RDWR | O_CREAT;
|
|
|
554 }
|
|
|
555 else
|
|
|
556 {
|
|
|
557 char *acc;
|
|
|
558 CHECK_STRING (ackcess);
|
|
14
|
559 acc = (char *) XSTRING_DATA (ackcess);
|
|
0
|
560
|
|
|
561 if (strchr (acc, '+'))
|
|
|
562 accessmask |= O_CREAT;
|
|
|
563
|
|
|
564 if (strchr (acc, 'r') && strchr (acc, 'w'))
|
|
|
565 {
|
|
|
566 accessmask |= O_RDWR;
|
|
|
567 }
|
|
|
568 else if (strchr (acc, 'w'))
|
|
|
569 {
|
|
|
570 accessmask |= O_WRONLY;
|
|
|
571 }
|
|
|
572 else
|
|
|
573 {
|
|
|
574 accessmask |= O_RDONLY;
|
|
|
575 }
|
|
|
576 }
|
|
|
577
|
|
|
578 if (NILP (mode))
|
|
|
579 {
|
|
|
580 modemask = 493; /* rwxr-xr-x */
|
|
|
581 }
|
|
|
582 else
|
|
|
583 {
|
|
|
584 CHECK_INT (mode);
|
|
|
585 modemask = XINT (mode);
|
|
|
586 }
|
|
|
587
|
|
|
588 #ifdef HAVE_DBM
|
|
|
589 if (NILP (type) || EQ (type, Qdbm))
|
|
|
590 {
|
|
|
591 the_type = DB_DBM;
|
|
|
592 funcblock = &ndbm_func_block;
|
|
|
593 goto db_done;
|
|
|
594 }
|
|
|
595 #endif
|
|
|
596
|
|
|
597 #ifdef HAVE_BERKELEY_DB
|
|
|
598 if (NILP (type) || EQ (type, Qberkeley_db))
|
|
|
599 {
|
|
|
600
|
|
|
601 funcblock = &berk_func_block;
|
|
|
602 the_type = DB_BERKELEY;
|
|
|
603 goto db_done;
|
|
|
604 }
|
|
|
605 #endif
|
|
|
606
|
|
|
607 signal_simple_error ("Unsupported database type", type);
|
|
|
608 return (Qnil);
|
|
|
609
|
|
|
610 db_done:
|
|
14
|
611 db = funcblock->open_file ((char *) XSTRING_DATA (file), subtype,
|
|
0
|
612 accessmask, modemask);
|
|
|
613
|
|
|
614 if (!db)
|
|
|
615 {
|
|
|
616 return (Qnil);
|
|
|
617 }
|
|
|
618
|
|
|
619 dbase = new_database ();
|
|
|
620 dbase->fname = file;
|
|
|
621 dbase->type = the_type;
|
|
|
622 dbase->mode = modemask;
|
|
|
623 dbase->ackcess = accessmask;
|
|
|
624 dbase->db_handle = db;
|
|
|
625 dbase->funcs = funcblock;
|
|
|
626 XSETDATABASE (retval, dbase);
|
|
|
627
|
|
48
|
628 UNGCPRO;
|
|
|
629
|
|
0
|
630 return (retval);
|
|
|
631 }
|
|
|
632
|
|
20
|
633 DEFUN ("put-database", Fputdatabase, 3, 4, 0, /*
|
|
0
|
634 Store KEY and VAL in DATABASE. If optinal fourth arg REPLACE is
|
|
|
635 non-nil, replace any existing entry in the database.
|
|
20
|
636 */
|
|
|
637 (key, val, dbase, replace))
|
|
0
|
638 {
|
|
|
639 struct database_struct *db;
|
|
|
640 int status;
|
|
|
641 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
642
|
|
|
643 CHECK_DATABASE (dbase);
|
|
|
644 CHECK_STRING (key);
|
|
|
645 db = XDATABASE (dbase);
|
|
|
646 if (!DATABASE_LIVE_P (db))
|
|
|
647 signal_simple_error ("Attempting to access closed database", dbase);
|
|
|
648
|
|
|
649 GCPRO4 (key, val, dbase, replace);
|
|
|
650 status = db->funcs->put (db, key, val, replace);
|
|
|
651 UNGCPRO;
|
|
|
652 return status ? Qt : Qnil;
|
|
|
653 }
|
|
|
654
|
|
20
|
655 DEFUN ("remove-database", Fremdatabase, 2, 2, 0, /*
|
|
0
|
656 Remove KEY from DATABASE.
|
|
20
|
657 */
|
|
|
658 (key, dbase))
|
|
0
|
659 {
|
|
|
660 struct database_struct *db;
|
|
|
661 CHECK_DATABASE (dbase);
|
|
|
662 CHECK_STRING (key);
|
|
|
663
|
|
|
664 db = XDATABASE (dbase);
|
|
|
665 if (!DATABASE_LIVE_P (db))
|
|
|
666 signal_simple_error ("Attempting to access closed database", dbase);
|
|
|
667 return db->funcs->rem (db, key) ? Qt : Qnil;
|
|
|
668 }
|
|
|
669
|
|
20
|
670 DEFUN ("get-database", Fgetdatabase, 2, 3, 0, /*
|
|
0
|
671 Find value for KEY in DATABASE.
|
|
|
672 If there is no corresponding value, return DEFAULT (defaults to nil).
|
|
20
|
673 */
|
|
|
674 (key, dbase, defalt))
|
|
0
|
675 {
|
|
|
676 Lisp_Object retval;
|
|
|
677 struct database_struct *db;
|
|
|
678
|
|
|
679 CHECK_DATABASE (dbase);
|
|
|
680 CHECK_STRING (key);
|
|
|
681 db = XDATABASE (dbase);
|
|
|
682 if (!DATABASE_LIVE_P (db))
|
|
|
683 signal_simple_error ("Attempting to access closed database", dbase);
|
|
|
684
|
|
|
685 retval = db->funcs->get (db, key);
|
|
|
686
|
|
|
687 return (NILP (retval) ? defalt : retval);
|
|
|
688 }
|
|
|
689
|
|
20
|
690 DEFUN ("map-database", Fmapdatabase, 2, 2, 0, /*
|
|
0
|
691 Map FUNCTION over entries in DATABASE, calling it with two args,
|
|
|
692 each key and value in the database.
|
|
20
|
693 */
|
|
|
694 (function, dbase))
|
|
0
|
695 {
|
|
|
696 struct gcpro gcpro1, gcpro2;
|
|
|
697 struct database_struct *db;
|
|
|
698
|
|
|
699 CHECK_DATABASE (dbase);
|
|
|
700 GCPRO2 (dbase, function);
|
|
|
701
|
|
|
702 db = XDATABASE (dbase);
|
|
|
703 if (!DATABASE_LIVE_P (db))
|
|
|
704 signal_simple_error ("Attempting to access closed database", dbase);
|
|
|
705 db->funcs->map (db, function);
|
|
|
706 UNGCPRO;
|
|
|
707 return Qnil;
|
|
|
708 }
|
|
|
709
|
|
|
710 void
|
|
|
711 syms_of_dbm (void)
|
|
|
712 {
|
|
|
713 defsymbol (&Qdatabasep, "databasep");
|
|
|
714 #ifdef HAVE_DBM
|
|
|
715 defsymbol (&Qdbm, "dbm");
|
|
|
716 #endif
|
|
|
717 #ifdef HAVE_BERKELEY_DB
|
|
|
718 defsymbol (&Qberkeley_db, "berkeley-db");
|
|
|
719 defsymbol (&Qhash, "hash");
|
|
|
720 defsymbol (&Qbtree, "btree");
|
|
|
721 defsymbol (&Qrecno, "recno");
|
|
|
722 #endif
|
|
|
723
|
|
20
|
724 DEFSUBR (Fmake_database);
|
|
|
725 DEFSUBR (Fdatabasep);
|
|
|
726 DEFSUBR (Fmapdatabase);
|
|
|
727 DEFSUBR (Fputdatabase);
|
|
|
728 DEFSUBR (Fgetdatabase);
|
|
|
729 DEFSUBR (Fremdatabase);
|
|
|
730 DEFSUBR (Fdatabase_type);
|
|
|
731 DEFSUBR (Fdatabase_subtype);
|
|
|
732 DEFSUBR (Fdatabase_error);
|
|
|
733 DEFSUBR (Fdatabase_live_p);
|
|
|
734 DEFSUBR (Fdatabase_file_name);
|
|
|
735 DEFSUBR (Fdatabase_close);
|
|
0
|
736 }
|
|
|
737
|
|
|
738 void
|
|
|
739 vars_of_dbm (void)
|
|
|
740 {
|
|
|
741 #ifdef HAVE_DBM
|
|
|
742 Fprovide (Qdbm);
|
|
|
743 #endif
|
|
|
744 #ifdef HAVE_BERKELEY_DB
|
|
|
745 Fprovide (Qberkeley_db);
|
|
|
746 #endif
|
|
|
747 }
|
|
|
748 #endif /* HAVE_DATABASE */
|
