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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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74 int errno;
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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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103 dbase->errno = 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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141 string_data (XSTRING (dbase->fname)), type, subtype, perms,
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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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163 DEFUN ("close-database", Fdatabase_close, Sdatabase_close, 1, 1, 0 /*
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164 Close database OBJ.
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165 */ )
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166 (obj)
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167 Lisp_Object obj;
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168 {
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169 struct database_struct *db;
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170 CHECK_DATABASE (obj);
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171 db = XDATABASE (obj);
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172
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173 if (DATABASE_LIVE_P (db))
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174 db->funcs->close (db);
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175 else
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176 signal_simple_error ("Attempting to access closed database", obj);
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177
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178 return (Qnil);
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179 }
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180
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181 DEFUN ("database-type", Fdatabase_type, Sdatabase_type, 1, 1, 0 /*
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182 Return the type of database OBJ.
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183 */)
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184 (obj)
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185 Lisp_Object obj;
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186 {
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187 struct database_struct *db;
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188 CHECK_DATABASE (obj);
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189 db = XDATABASE (obj);
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190
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191 return db->funcs->get_lisp_type (db);
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192 }
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193
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194 DEFUN ("database-subtype", Fdatabase_subtype, Sdatabase_subtype, 1, 1, 0 /*
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195 Return the subtype of database OBJ, if any.
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196 */ )
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197 (obj)
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198 Lisp_Object obj;
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199 {
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200 struct database_struct *db;
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201
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202 CHECK_DATABASE (obj);
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203 db = XDATABASE (obj);
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204
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205 return (intern (db->funcs->get_subtype (db)));
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206 }
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207
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208 DEFUN ("database-live-p", Fdatabase_live_p, Sdatabase_live_p, 1, 1, 0 /*
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209 Return t iff OBJ is an active database, else nil.
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210 */ )
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211 (obj)
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212 Lisp_Object (obj);
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213 {
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214 struct database_struct *db;
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215 CHECK_DATABASE (obj);
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216 db = XDATABASE (obj);
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217
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218 return (DATABASE_LIVE_P (db) ? Qt : Qnil);
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219 }
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220
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221 DEFUN ("database-file-name", Fdatabase_file_name, Sdatabase_file_name,
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222 1, 1, 0 /*
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223 Return the filename associated with the database OBJ.
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224 */)
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225 (obj)
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226 Lisp_Object obj;
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227 {
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228 struct database_struct *db;
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229 CHECK_DATABASE (obj);
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230 db = XDATABASE (obj);
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231 return (db->fname);
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232 }
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233
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234 DEFUN ("databasep", Fdatabasep, Sdatabasep, 1, 1, 0 /*
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235 Return t iff OBJ is a database, else nil.
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236 */ )
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237 (obj)
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238 Lisp_Object obj;
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239 {
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240 return ((DATABASEP (obj)) ? Qt : Qnil);
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241 }
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242
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243 #ifdef HAVE_DBM
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244 static void
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245 dbm_map (struct database_struct *db, Lisp_Object func)
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246 {
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247 datum keydatum, valdatum;
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248 DBM *handle = (DBM *)db->db_handle;
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249 Lisp_Object key, val;
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250
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251 for (keydatum = dbm_firstkey (handle);
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252 keydatum.dptr != NULL;
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253 keydatum = dbm_nextkey (handle))
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254 {
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255 valdatum = dbm_fetch (handle, keydatum);
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256 key = make_string ((unsigned char *) keydatum.dptr, keydatum.dsize);
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257 val = make_string ((unsigned char *) valdatum.dptr, valdatum.dsize);
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258 call2 (func, key, val);
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259 }
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260 }
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261
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262 static Lisp_Object
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263 dbm_get (struct database_struct *db, Lisp_Object key)
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264 {
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265 datum keydatum, valdatum;
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266 DBM *handle = (DBM *)db->db_handle;
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267 keydatum.dptr = (char *) string_data (XSTRING (key));
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268 keydatum.dsize = string_length (XSTRING (key));
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269 valdatum = dbm_fetch (handle, keydatum);
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270
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271 return (valdatum.dptr
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272 ? make_string ((unsigned char *) valdatum.dptr, valdatum.dsize)
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273 : Qnil);
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274 }
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275
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276 static int
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277 dbm_put (struct database_struct *db,
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278 Lisp_Object key,
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279 Lisp_Object val,
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280 Lisp_Object replace)
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281 {
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282 DBM *handle = (DBM *)db->db_handle;
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283 datum keydatum, valdatum;
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284
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285 valdatum.dptr = (char *) string_data (XSTRING (val));
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286 valdatum.dsize = string_length (XSTRING (val));
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287 keydatum.dptr = (char *) string_data (XSTRING (key));
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288 keydatum.dsize = string_length (XSTRING (key));
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289
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290 return (!dbm_store (handle, keydatum, valdatum,
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291 (NILP (replace)) ? DBM_INSERT : DBM_REPLACE));
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292 }
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293
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294 static int
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295 dbm_remove (struct database_struct *db, Lisp_Object key)
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296 {
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297 datum keydatum;
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298 keydatum.dptr = (char *) string_data (XSTRING (key));
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299 keydatum.dsize = string_length (XSTRING (key));
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300 return (dbm_delete (db->db_handle, keydatum));
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301 }
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302
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303 static Lisp_Object
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304 dbm_lisp_type (struct database_struct *db)
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305 {
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306 return (Qdbm);
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307 }
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308
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309 static CONST char *
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310 dbm_type (struct database_struct *db)
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311 {
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312 return ("dbm");
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313 }
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314
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315 static CONST char *
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316 dbm_subtype (struct database_struct *db)
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317 {
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318 return ("nil");
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319 }
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320
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321 static void *
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322 new_dbm_file (CONST char *file, Lisp_Object subtype, int ackcess, int mode)
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323 {
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324 DBM *db = NULL;
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325 db = dbm_open ((char *) file, ackcess, mode);
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326 return (void *) db;
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327 }
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328
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329 static Lisp_Object
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330 dbm_lasterr (struct database_struct *dbp)
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331 {
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332 char *temp = strerror (dbp->errno);
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333 return (make_string ((unsigned char *) temp, strlen (temp)));
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334 }
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335
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336 static void
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337 dbm_closeit (struct database_struct *db)
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338 {
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339 if (db->db_handle)
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340 dbm_close ((DBM *)db->db_handle);
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341 db->db_handle = NULL;
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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 new_dbm_file,
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349 dbm_get,
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350 dbm_put,
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351 dbm_remove,
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352 dbm_map,
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353 dbm_lisp_type,
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354 dbm_closeit,
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355 dbm_lasterr
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356 };
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357 #endif
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358
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359 #ifdef HAVE_BERKELEY_DB
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360 static Lisp_Object
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361 berkdb_lisp_type (struct database_struct *db)
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362 {
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363 return (Qberkeley_db);
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364 }
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365
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366 static CONST char *
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367 berkdb_type (struct database_struct *db)
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368 {
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369 return ("berkeley");
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370 }
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371
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372 static CONST char *
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373 berkdb_subtype (struct database_struct *db)
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374 {
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375 DB *temp = (DB *)db->db_handle;
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376
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377 if (!temp)
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378 return ("nil");
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379
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380 switch (temp->type)
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381 {
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382 case DB_BTREE:
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383 return ("btree");
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384 case DB_HASH:
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385 return ("hash");
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386 case DB_RECNO:
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387 return ("recno");
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388 }
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389 return ("unknown");
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390 }
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391
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392 static void *
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393 berkdb_open (CONST char *file, Lisp_Object subtype, int ackcess, int mode)
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394 {
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395 DB *db;
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396 DBTYPE real_subtype;
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397
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398 if (EQ (subtype, Qhash) || NILP (subtype))
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399 real_subtype = DB_HASH;
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400 else if (EQ (subtype, Qbtree))
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401 real_subtype = DB_BTREE;
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402 else if (EQ (subtype, Qrecno))
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403 real_subtype = DB_RECNO;
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404 else
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405 signal_simple_error ("Unsupported subtype", subtype);
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406
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407 db = dbopen (file, ackcess, mode, real_subtype, NULL);
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408
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409 return (void *) db;
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410 }
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411
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412 static Lisp_Object
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413 berkdb_lasterr (struct database_struct *dbp)
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414 {
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415 char *temp = strerror (dbp->errno);
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416 return (make_string ((unsigned char *) temp, strlen (temp)));
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417 }
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418
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419 static Lisp_Object
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420 berkdb_get (struct database_struct *db, Lisp_Object key)
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421 {
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422 DBT keydatum, valdatum;
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423 DB *dbp = (DB *) db->db_handle;
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424 int status = 0;
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|
|
425
|
|
|
426 keydatum.data = string_data (XSTRING (key));
|
|
|
427 keydatum.size = string_length (XSTRING (key));
|
|
|
428
|
|
|
429 status = dbp->get (dbp, &keydatum, &valdatum, 0);
|
|
|
430
|
|
|
431 if (!status)
|
|
|
432 return (make_string (valdatum.data, valdatum.size));
|
|
|
433
|
|
|
434 db->errno = (status == 1) ? -1 : errno;
|
|
|
435 return (Qnil);
|
|
|
436 }
|
|
|
437
|
|
|
438 static int
|
|
|
439 berkdb_put (struct database_struct *db,
|
|
|
440 Lisp_Object key,
|
|
|
441 Lisp_Object val,
|
|
|
442 Lisp_Object replace)
|
|
|
443 {
|
|
|
444 DBT keydatum, valdatum;
|
|
|
445 DB *dbp = (DB *) db->db_handle;
|
|
|
446 int status = 0;
|
|
|
447
|
|
|
448 keydatum.data = string_data (XSTRING (key));
|
|
|
449 keydatum.size = string_length (XSTRING (key));
|
|
|
450 valdatum.data = string_data (XSTRING (val));
|
|
|
451 valdatum.size = string_length (XSTRING (val));
|
|
|
452 status = dbp->put (dbp, &keydatum, &valdatum, NILP (replace)
|
|
|
453 ? R_NOOVERWRITE : 0);
|
|
|
454 db->errno = (status == 1) ? -1 : errno;
|
|
|
455 return status;
|
|
|
456 }
|
|
|
457
|
|
|
458 static int
|
|
|
459 berkdb_remove (struct database_struct *db, Lisp_Object key)
|
|
|
460 {
|
|
|
461 DBT keydatum;
|
|
|
462 DB *dbp = (DB *) db->db_handle;
|
|
|
463 int status;
|
|
|
464
|
|
|
465 keydatum.data = string_data (XSTRING (key));
|
|
|
466 keydatum.size = string_length (XSTRING (key));
|
|
|
467
|
|
|
468 status = dbp->del (dbp, &keydatum, 0);
|
|
|
469 if (!status)
|
|
|
470 return 0;
|
|
|
471
|
|
|
472 db->errno = (status == 1) ? -1 : errno;
|
|
|
473 return 1;
|
|
|
474 }
|
|
|
475
|
|
|
476 static void
|
|
|
477 berkdb_map (struct database_struct *db, Lisp_Object func)
|
|
|
478 {
|
|
|
479 DBT keydatum, valdatum;
|
|
|
480 Lisp_Object key, val;
|
|
|
481 DB *dbp = (DB *) db->db_handle;
|
|
|
482 int status;
|
|
|
483
|
|
|
484 for (status = dbp->seq (dbp, &keydatum, &valdatum, R_FIRST);
|
|
|
485 status == 0;
|
|
|
486 status = dbp->seq (dbp, &keydatum, &valdatum, R_NEXT))
|
|
|
487 {
|
|
|
488 key = make_string (keydatum.data, keydatum.size);
|
|
|
489 val = make_string (valdatum.data, valdatum.size);
|
|
|
490 call2 (func, key, val);
|
|
|
491 }
|
|
|
492 }
|
|
|
493
|
|
|
494 static void
|
|
|
495 berkdb_close (struct database_struct *db)
|
|
|
496 {
|
|
|
497 DB *dbp = (DB *)db->db_handle;
|
|
|
498 if (dbp)
|
|
|
499 {
|
|
|
500 dbp->sync (dbp, 0);
|
|
|
501 dbp->close (dbp);
|
|
|
502 }
|
|
|
503 db->db_handle = NULL;
|
|
|
504 }
|
|
|
505
|
|
|
506 static DB_FUNCS berk_func_block =
|
|
|
507 {
|
|
|
508 berkdb_subtype,
|
|
|
509 berkdb_type,
|
|
|
510 berkdb_open,
|
|
|
511 berkdb_get,
|
|
|
512 berkdb_put,
|
|
|
513 berkdb_remove,
|
|
|
514 berkdb_map,
|
|
|
515 berkdb_lisp_type,
|
|
|
516 berkdb_close,
|
|
|
517 berkdb_lasterr
|
|
|
518 };
|
|
|
519 #endif
|
|
|
520
|
|
|
521 DEFUN ("database-last-error", Fdatabase_error, Sdatabase_error, 0, 1, 0 /*
|
|
|
522 Return the last error associated with database OBJ.
|
|
|
523 */ )
|
|
|
524 (obj)
|
|
|
525 Lisp_Object obj;
|
|
|
526 {
|
|
|
527 struct database_struct *db;
|
|
|
528
|
|
|
529 if (NILP (obj))
|
|
|
530 {
|
|
|
531 char *temp = strerror (errno);
|
|
|
532 return (make_string ((unsigned char *) temp, strlen (temp)));
|
|
|
533 }
|
|
|
534
|
|
|
535 CHECK_DATABASE (obj);
|
|
|
536 db = XDATABASE (obj);
|
|
|
537 return (db->funcs->last_error (db));
|
|
|
538 }
|
|
|
539
|
|
|
540 DEFUN ("open-database", Fmake_database, Smake_database, 1, 5, 0 /*
|
|
|
541 Open database FILE, using database method TYPE and SUBTYPE, with
|
|
|
542 access rights ACCESS and permissions MODE. ACCESS can be any
|
|
|
543 combination of 'r' 'w' and '+', for read, write, and creation flags.
|
|
|
544 */ )
|
|
|
545 (file, type, subtype, ackcess, mode)
|
|
|
546 Lisp_Object file, type, subtype, ackcess, mode;
|
|
|
547 {
|
|
|
548 Lisp_Object retval = Qnil;
|
|
|
549 int modemask;
|
|
|
550 int accessmask = 0;
|
|
|
551 XEMACS_DB_TYPE the_type;
|
|
|
552 DB_FUNCS *funcblock;
|
|
|
553 struct database_struct *dbase = NULL;
|
|
|
554 void *db = NULL;
|
|
|
555
|
|
|
556 CHECK_STRING (file);
|
|
|
557
|
|
|
558 if (NILP (ackcess))
|
|
|
559 {
|
|
|
560 accessmask = O_RDWR | O_CREAT;
|
|
|
561 }
|
|
|
562 else
|
|
|
563 {
|
|
|
564 char *acc;
|
|
|
565 CHECK_STRING (ackcess);
|
|
|
566 acc = (char *) string_data (XSTRING (ackcess));
|
|
|
567
|
|
|
568 if (strchr (acc, '+'))
|
|
|
569 accessmask |= O_CREAT;
|
|
|
570
|
|
|
571 if (strchr (acc, 'r') && strchr (acc, 'w'))
|
|
|
572 {
|
|
|
573 accessmask |= O_RDWR;
|
|
|
574 }
|
|
|
575 else if (strchr (acc, 'w'))
|
|
|
576 {
|
|
|
577 accessmask |= O_WRONLY;
|
|
|
578 }
|
|
|
579 else
|
|
|
580 {
|
|
|
581 accessmask |= O_RDONLY;
|
|
|
582 }
|
|
|
583 }
|
|
|
584
|
|
|
585 if (NILP (mode))
|
|
|
586 {
|
|
|
587 modemask = 493; /* rwxr-xr-x */
|
|
|
588 }
|
|
|
589 else
|
|
|
590 {
|
|
|
591 CHECK_INT (mode);
|
|
|
592 modemask = XINT (mode);
|
|
|
593 }
|
|
|
594
|
|
|
595 #ifdef HAVE_DBM
|
|
|
596 if (NILP (type) || EQ (type, Qdbm))
|
|
|
597 {
|
|
|
598 the_type = DB_DBM;
|
|
|
599 funcblock = &ndbm_func_block;
|
|
|
600 goto db_done;
|
|
|
601 }
|
|
|
602 #endif
|
|
|
603
|
|
|
604 #ifdef HAVE_BERKELEY_DB
|
|
|
605 if (NILP (type) || EQ (type, Qberkeley_db))
|
|
|
606 {
|
|
|
607
|
|
|
608 funcblock = &berk_func_block;
|
|
|
609 the_type = DB_BERKELEY;
|
|
|
610 goto db_done;
|
|
|
611 }
|
|
|
612 #endif
|
|
|
613
|
|
|
614 signal_simple_error ("Unsupported database type", type);
|
|
|
615 return (Qnil);
|
|
|
616
|
|
|
617 db_done:
|
|
|
618 db = funcblock->open_file ((char *) string_data (XSTRING (file)), subtype,
|
|
|
619 accessmask, modemask);
|
|
|
620
|
|
|
621 if (!db)
|
|
|
622 {
|
|
|
623 return (Qnil);
|
|
|
624 }
|
|
|
625
|
|
|
626 dbase = new_database ();
|
|
|
627 dbase->fname = file;
|
|
|
628 dbase->type = the_type;
|
|
|
629 dbase->mode = modemask;
|
|
|
630 dbase->ackcess = accessmask;
|
|
|
631 dbase->db_handle = db;
|
|
|
632 dbase->funcs = funcblock;
|
|
|
633 XSETDATABASE (retval, dbase);
|
|
|
634
|
|
|
635 return (retval);
|
|
|
636 }
|
|
|
637
|
|
|
638 DEFUN ("put-database", Fputdatabase, Sputdatabase, 3, 4, 0 /*
|
|
|
639 Store KEY and VAL in DATABASE. If optinal fourth arg REPLACE is
|
|
|
640 non-nil, replace any existing entry in the database.
|
|
|
641 */ )
|
|
|
642 (key, val, dbase, replace)
|
|
|
643 Lisp_Object key, val, dbase, replace;
|
|
|
644 {
|
|
|
645 struct database_struct *db;
|
|
|
646 int status;
|
|
|
647 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
648
|
|
|
649 CHECK_DATABASE (dbase);
|
|
|
650 CHECK_STRING (key);
|
|
|
651 db = XDATABASE (dbase);
|
|
|
652 if (!DATABASE_LIVE_P (db))
|
|
|
653 signal_simple_error ("Attempting to access closed database", dbase);
|
|
|
654
|
|
|
655 GCPRO4 (key, val, dbase, replace);
|
|
|
656 status = db->funcs->put (db, key, val, replace);
|
|
|
657 UNGCPRO;
|
|
|
658 return status ? Qt : Qnil;
|
|
|
659 }
|
|
|
660
|
|
|
661 DEFUN ("remove-database", Fremdatabase, Sremdatabase, 2, 2, 0 /*
|
|
|
662 Remove KEY from DATABASE.
|
|
|
663 */ )
|
|
|
664 (key, dbase)
|
|
|
665 Lisp_Object key, dbase;
|
|
|
666 {
|
|
|
667 struct database_struct *db;
|
|
|
668 CHECK_DATABASE (dbase);
|
|
|
669 CHECK_STRING (key);
|
|
|
670
|
|
|
671 db = XDATABASE (dbase);
|
|
|
672 if (!DATABASE_LIVE_P (db))
|
|
|
673 signal_simple_error ("Attempting to access closed database", dbase);
|
|
|
674 return db->funcs->rem (db, key) ? Qt : Qnil;
|
|
|
675 }
|
|
|
676
|
|
|
677 DEFUN ("get-database", Fgetdatabase, Sgetdatabase, 2, 3, 0 /*
|
|
|
678 Find value for KEY in DATABASE.
|
|
|
679 If there is no corresponding value, return DEFAULT (defaults to nil).
|
|
|
680 */ )
|
|
|
681 (key, dbase, defalt)
|
|
|
682 Lisp_Object key, dbase, defalt; /* One can't even spell correctly in C */
|
|
|
683 {
|
|
|
684 Lisp_Object retval;
|
|
|
685 struct database_struct *db;
|
|
|
686
|
|
|
687 CHECK_DATABASE (dbase);
|
|
|
688 CHECK_STRING (key);
|
|
|
689 db = XDATABASE (dbase);
|
|
|
690 if (!DATABASE_LIVE_P (db))
|
|
|
691 signal_simple_error ("Attempting to access closed database", dbase);
|
|
|
692
|
|
|
693 retval = db->funcs->get (db, key);
|
|
|
694
|
|
|
695 return (NILP (retval) ? defalt : retval);
|
|
|
696 }
|
|
|
697
|
|
|
698 DEFUN ("map-database", Fmapdatabase, Smapdatabase, 2, 2, 0 /*
|
|
|
699 Map FUNCTION over entries in DATABASE, calling it with two args,
|
|
|
700 each key and value in the database.
|
|
|
701 */ )
|
|
|
702 (function, dbase)
|
|
|
703 Lisp_Object function, dbase;
|
|
|
704 {
|
|
|
705 struct gcpro gcpro1, gcpro2;
|
|
|
706 struct database_struct *db;
|
|
|
707
|
|
|
708 CHECK_DATABASE (dbase);
|
|
|
709 GCPRO2 (dbase, function);
|
|
|
710
|
|
|
711 db = XDATABASE (dbase);
|
|
|
712 if (!DATABASE_LIVE_P (db))
|
|
|
713 signal_simple_error ("Attempting to access closed database", dbase);
|
|
|
714 db->funcs->map (db, function);
|
|
|
715 UNGCPRO;
|
|
|
716 return Qnil;
|
|
|
717 }
|
|
|
718
|
|
|
719 void
|
|
|
720 syms_of_dbm (void)
|
|
|
721 {
|
|
|
722 defsymbol (&Qdatabasep, "databasep");
|
|
|
723 #ifdef HAVE_DBM
|
|
|
724 defsymbol (&Qdbm, "dbm");
|
|
|
725 #endif
|
|
|
726 #ifdef HAVE_BERKELEY_DB
|
|
|
727 defsymbol (&Qberkeley_db, "berkeley-db");
|
|
|
728 defsymbol (&Qhash, "hash");
|
|
|
729 defsymbol (&Qbtree, "btree");
|
|
|
730 defsymbol (&Qrecno, "recno");
|
|
|
731 #endif
|
|
|
732
|
|
|
733 defsubr (&Smake_database);
|
|
|
734 defsubr (&Sdatabasep);
|
|
|
735 defsubr (&Smapdatabase);
|
|
|
736 defsubr (&Sputdatabase);
|
|
|
737 defsubr (&Sgetdatabase);
|
|
|
738 defsubr (&Sremdatabase);
|
|
|
739 defsubr (&Sdatabase_type);
|
|
|
740 defsubr (&Sdatabase_subtype);
|
|
|
741 defsubr (&Sdatabase_error);
|
|
|
742 defsubr (&Sdatabase_live_p);
|
|
|
743 defsubr (&Sdatabase_file_name);
|
|
|
744 defsubr (&Sdatabase_close);
|
|
|
745 }
|
|
|
746
|
|
|
747 void
|
|
|
748 vars_of_dbm (void)
|
|
|
749 {
|
|
|
750 #ifdef HAVE_DBM
|
|
|
751 Fprovide (Qdbm);
|
|
|
752 #endif
|
|
|
753 #ifdef HAVE_BERKELEY_DB
|
|
|
754 Fprovide (Qberkeley_db);
|
|
|
755 #endif
|
|
|
756 }
|
|
|
757 #endif /* HAVE_DATABASE */
|
