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annotate src/database.c @ 5008:cad59a0a3b19
Add license information from Marcus Thiessel.
See xemacs-beta message <20100208091453.25900@gmx.net>.
| author | Jerry James <james@xemacs.org> |
|---|---|
| date | Tue, 09 Feb 2010 09:50:49 -0700 |
| parents | 97c45e3ad810 |
| children | b5df3737028a |
| rev | line source |
|---|---|
| 428 | 1 /* Database access routines |
| 2 Copyright (C) 1996, William M. Perry | |
| 3025 | 3 Copyright (C) 2001, 2002, 2005 Ben Wing. |
| 428 | 4 |
| 5 This file is part of XEmacs. | |
| 6 | |
| 7 XEmacs is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2, or (at your option) any | |
| 10 later version. | |
| 11 | |
| 12 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with XEmacs; see the file COPYING. If not, write to | |
| 19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 20 Boston, MA 02111-1307, USA. */ | |
| 21 | |
| 22 /* Synched up with: Not in FSF. */ | |
| 23 | |
| 24 /* Written by Bill Perry */ | |
| 25 /* Substantially rewritten by Martin Buchholz */ | |
| 26 /* db 2.x support added by Andreas Jaeger */ | |
| 771 | 27 /* Mule-ized 6-22-00 Ben Wing */ |
| 428 | 28 |
| 29 #include <config.h> | |
| 30 #include "lisp.h" | |
| 771 | 31 |
| 428 | 32 #include "sysfile.h" |
| 33 #include "buffer.h" | |
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34 #include "file-coding.h" |
| 428 | 35 |
| 36 #ifndef HAVE_DATABASE | |
| 37 #error HAVE_DATABASE not defined!! | |
| 38 #endif | |
| 39 | |
| 40 #include "database.h" /* Our include file */ | |
| 41 | |
| 42 #ifdef HAVE_BERKELEY_DB | |
| 43 /* Work around Berkeley DB's use of int types which are defined | |
| 44 slightly differently in the not quite yet standard <inttypes.h>. | |
| 45 See db.h for details of why we're resorting to this... */ | |
| 46 /* glibc 2.1 doesn't have this problem with DB 2.x */ | |
| 47 #if !(defined __GLIBC__ && __GLIBC_MINOR__ >= 1) | |
| 48 #ifdef HAVE_INTTYPES_H | |
| 3739 | 49 #ifndef __BIT_TYPES_DEFINED__ |
| 428 | 50 #define __BIT_TYPES_DEFINED__ |
| 3739 | 51 #endif |
| 428 | 52 #include <inttypes.h> |
| 3739 | 53 #if !HAVE_U_INT8_T |
| 428 | 54 typedef uint8_t u_int8_t; |
| 3739 | 55 #endif |
| 56 #if !HAVE_U_INT16_T | |
| 428 | 57 typedef uint16_t u_int16_t; |
| 3739 | 58 #endif |
| 59 #if !HAVE_U_INT32_T | |
| 428 | 60 typedef uint32_t u_int32_t; |
| 3739 | 61 #endif |
| 428 | 62 #ifdef WE_DONT_NEED_QUADS |
| 3739 | 63 #if !HAVE_U_INT64_T |
| 428 | 64 typedef uint64_t u_int64_t; |
| 3739 | 65 #endif |
| 428 | 66 #endif /* WE_DONT_NEED_QUADS */ |
| 67 #endif /* HAVE_INTTYPES_H */ | |
| 68 #endif /* !(defined __GLIBC__ && __GLIBC_MINOR__ >= 1) */ | |
| 1460 | 69 /* Berkeley DB wants __STDC__ to be defined; else if does `#define const' */ |
| 70 #if ! defined (__STDC__) && ! defined(__cplusplus) | |
| 71 #define __STDC__ 0 | |
| 72 #endif | |
| 442 | 73 #include DB_H_FILE /* Berkeley db's header file */ |
| 428 | 74 #ifndef DB_VERSION_MAJOR |
| 75 # define DB_VERSION_MAJOR 1 | |
| 76 #endif /* DB_VERSION_MAJOR */ | |
| 1141 | 77 #ifndef DB_VERSION_MINOR |
| 78 # define DB_VERSION_MINOR 0 | |
| 79 #endif /* DB_VERSION_MINOR */ | |
| 428 | 80 Lisp_Object Qberkeley_db; |
| 81 Lisp_Object Qhash, Qbtree, Qrecno, Qunknown; | |
| 448 | 82 #if DB_VERSION_MAJOR > 2 |
| 83 Lisp_Object Qqueue; | |
| 84 #endif | |
| 428 | 85 #endif /* HAVE_BERKELEY_DB */ |
| 86 | |
| 87 #ifdef HAVE_DBM | |
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88 # ifdef TRUST_NDBM_H_PROTOTYPES |
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89 # include NDBM_H_FILE |
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90 # else /* not TRUST_NDBM_H_PROTOTYPES */ |
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91 |
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92 /* The prototypes in gdbm/ndbm.h currently are broken when compiling |
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93 using C++, since they are of the form `datum dbm_firstkey()', without any |
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94 args given. */ |
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95 |
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96 #if defined(__cplusplus) || defined(c_plusplus) |
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97 extern "C" { |
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98 #endif |
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99 |
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100 /* Parameters to dbm_store for simple insertion or replacement. */ |
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101 #define DBM_INSERT 0 |
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102 #define DBM_REPLACE 1 |
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103 |
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104 /* The data and key structure. This structure is defined for compatibility. */ |
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105 typedef struct |
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106 { |
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107 char *dptr; |
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108 int dsize; |
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109 } datum; |
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110 |
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111 /* The file information header. This is good enough for most applications. */ |
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112 typedef struct {int dummy[10];} DBM; |
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113 |
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114 int dbm_clearerr(DBM *); |
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115 void dbm_close(DBM *); |
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116 int dbm_delete(DBM *, datum); |
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117 int dbm_error(DBM *); |
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118 datum dbm_fetch(DBM *, datum); |
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119 datum dbm_firstkey(DBM *); |
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120 datum dbm_nextkey(DBM *); |
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121 DBM *dbm_open(const char *, int, mode_t); |
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122 int dbm_store(DBM *, datum, datum, int); |
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123 |
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124 #if defined(__cplusplus) || defined(c_plusplus) |
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125 } |
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126 #endif |
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127 |
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128 # endif /* (not) TRUST_NDBM_H_PROTOTYPES */ |
| 428 | 129 Lisp_Object Qdbm; |
| 130 #endif /* HAVE_DBM */ | |
| 131 | |
| 132 Lisp_Object Vdatabase_coding_system; | |
| 133 | |
| 134 Lisp_Object Qdatabasep; | |
| 135 | |
| 136 typedef struct | |
| 137 { | |
| 138 Lisp_Object (*get_subtype) (Lisp_Database *); | |
| 139 Lisp_Object (*get_type) (Lisp_Database *); | |
| 140 Lisp_Object (*get) (Lisp_Database *, Lisp_Object); | |
| 141 int (*put) (Lisp_Database *, Lisp_Object, Lisp_Object, Lisp_Object); | |
| 142 int (*rem) (Lisp_Database *, Lisp_Object); | |
| 143 void (*map) (Lisp_Database *, Lisp_Object); | |
| 144 void (*close) (Lisp_Database *); | |
| 145 Lisp_Object (*last_error) (Lisp_Database *); | |
| 146 } DB_FUNCS; | |
| 147 | |
| 148 struct Lisp_Database | |
| 149 { | |
| 3017 | 150 struct LCRECORD_HEADER header; |
| 428 | 151 Lisp_Object fname; |
| 152 int mode; | |
| 153 int access_; | |
| 154 int dberrno; | |
| 155 int live_p; | |
| 156 #ifdef HAVE_DBM | |
| 157 DBM *dbm_handle; | |
| 158 #endif | |
| 159 #ifdef HAVE_BERKELEY_DB | |
| 160 DB *db_handle; | |
| 161 #endif | |
| 162 DB_FUNCS *funcs; | |
| 163 Lisp_Object coding_system; | |
| 164 }; | |
| 165 | |
| 166 #define XDATABASE(x) XRECORD (x, database, Lisp_Database) | |
| 617 | 167 #define wrap_database(p) wrap_record (p, database) |
| 428 | 168 #define DATABASEP(x) RECORDP (x, database) |
| 169 #define CHECK_DATABASE(x) CHECK_RECORD (x, database) | |
| 170 #define CONCHECK_DATABASE(x) CONCHECK_RECORD (x, database) | |
| 171 #define DATABASE_LIVE_P(x) (x->live_p) | |
| 172 | |
| 173 #define CHECK_LIVE_DATABASE(db) do { \ | |
| 174 CHECK_DATABASE (db); \ | |
| 175 if (!DATABASE_LIVE_P (XDATABASE(db))) \ | |
| 563 | 176 invalid_operation ("Attempting to access closed database", db); \ |
| 428 | 177 } while (0) |
| 178 | |
| 179 | |
| 180 static Lisp_Database * | |
| 181 allocate_database (void) | |
| 182 { | |
| 3017 | 183 Lisp_Database *db = ALLOC_LCRECORD_TYPE (Lisp_Database, &lrecord_database); |
| 428 | 184 |
| 185 db->fname = Qnil; | |
| 186 db->live_p = 0; | |
| 187 #ifdef HAVE_BERKELEY_DB | |
| 188 db->db_handle = NULL; | |
| 189 #endif | |
| 190 #ifdef HAVE_DBM | |
| 191 db->dbm_handle = NULL; | |
| 192 #endif | |
| 193 db->access_ = 0; | |
| 194 db->mode = 0; | |
| 195 db->dberrno = 0; | |
| 771 | 196 db->coding_system = Qnil; |
| 428 | 197 return db; |
| 198 } | |
| 199 | |
| 1204 | 200 static const struct memory_description database_description[] = { |
| 934 | 201 { XD_LISP_OBJECT, offsetof (struct Lisp_Database, fname) }, |
| 202 { XD_END} | |
| 203 }; | |
| 204 | |
| 428 | 205 static Lisp_Object |
| 444 | 206 mark_database (Lisp_Object object) |
| 428 | 207 { |
| 444 | 208 Lisp_Database *db = XDATABASE (object); |
| 428 | 209 return db->fname; |
| 210 } | |
| 211 | |
| 212 static void | |
| 2286 | 213 print_database (Lisp_Object obj, Lisp_Object printcharfun, |
| 214 int UNUSED (escapeflag)) | |
| 428 | 215 { |
| 216 Lisp_Database *db = XDATABASE (obj); | |
| 217 | |
| 218 if (print_readably) | |
| 4846 | 219 printing_unreadable_lcrecord (obj, 0); |
| 428 | 220 |
| 793 | 221 write_fmt_string_lisp (printcharfun, "#<database \"%s\" (%s/%s/", |
| 222 3, db->fname, db->funcs->get_type (db), | |
| 223 db->funcs->get_subtype (db)); | |
| 224 | |
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225 write_fmt_string (printcharfun, "%s) ", |
| 793 | 226 (!DATABASE_LIVE_P (db) ? "closed" : |
| 227 (db->access_ & O_WRONLY) ? "writeonly" : | |
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228 (db->access_ & O_RDWR) ? "readwrite" : "readonly")); |
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229 |
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230 write_fmt_string_lisp (printcharfun, "coding: %s ", 1, |
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231 XSYMBOL_NAME (XCODING_SYSTEM_NAME |
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232 (db->coding_system))); |
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233 |
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234 write_fmt_string (printcharfun, "0x%x>", db->header.uid); |
| 428 | 235 } |
| 236 | |
| 237 static void | |
| 238 finalize_database (void *header, int for_disksave) | |
| 239 { | |
| 240 Lisp_Database *db = (Lisp_Database *) header; | |
| 241 | |
| 242 if (for_disksave) | |
| 243 { | |
| 563 | 244 invalid_operation |
| 793 | 245 ("Can't dump an emacs containing database objects", |
| 246 wrap_database (db)); | |
| 428 | 247 } |
| 248 db->funcs->close (db); | |
| 249 } | |
| 250 | |
| 934 | 251 DEFINE_LRECORD_IMPLEMENTATION ("database", database, |
| 252 0, /*dumpable-flag*/ | |
| 253 mark_database, print_database, | |
| 254 finalize_database, 0, 0, | |
| 255 database_description, | |
| 256 Lisp_Database); | |
| 428 | 257 |
| 258 DEFUN ("close-database", Fclose_database, 1, 1, 0, /* | |
| 259 Close database DATABASE. | |
| 260 */ | |
| 261 (database)) | |
| 262 { | |
| 263 Lisp_Database *db; | |
| 264 CHECK_LIVE_DATABASE (database); | |
| 265 db = XDATABASE (database); | |
| 266 db->funcs->close (db); | |
| 267 db->live_p = 0; | |
| 268 return Qnil; | |
| 269 } | |
| 270 | |
| 271 DEFUN ("database-type", Fdatabase_type, 1, 1, 0, /* | |
| 272 Return the type of database DATABASE. | |
| 273 */ | |
| 274 (database)) | |
| 275 { | |
| 276 CHECK_DATABASE (database); | |
| 277 | |
| 278 return XDATABASE (database)->funcs->get_type (XDATABASE (database)); | |
| 279 } | |
| 280 | |
| 281 DEFUN ("database-subtype", Fdatabase_subtype, 1, 1, 0, /* | |
| 282 Return the subtype of database DATABASE, if any. | |
| 283 */ | |
| 284 (database)) | |
| 285 { | |
| 286 CHECK_DATABASE (database); | |
| 287 | |
| 288 return XDATABASE (database)->funcs->get_subtype (XDATABASE (database)); | |
| 289 } | |
| 290 | |
| 291 DEFUN ("database-live-p", Fdatabase_live_p, 1, 1, 0, /* | |
| 444 | 292 Return t if OBJECT is an active database. |
| 428 | 293 */ |
| 444 | 294 (object)) |
| 428 | 295 { |
| 444 | 296 return DATABASEP (object) && DATABASE_LIVE_P (XDATABASE (object)) ? |
| 297 Qt : Qnil; | |
| 428 | 298 } |
| 299 | |
| 300 DEFUN ("database-file-name", Fdatabase_file_name, 1, 1, 0, /* | |
| 301 Return the filename associated with the database DATABASE. | |
| 302 */ | |
| 303 (database)) | |
| 304 { | |
| 305 CHECK_DATABASE (database); | |
| 306 | |
| 307 return XDATABASE (database)->fname; | |
| 308 } | |
| 309 | |
| 310 DEFUN ("databasep", Fdatabasep, 1, 1, 0, /* | |
| 444 | 311 Return t if OBJECT is a database. |
| 428 | 312 */ |
| 444 | 313 (object)) |
| 428 | 314 { |
| 444 | 315 return DATABASEP (object) ? Qt : Qnil; |
| 428 | 316 } |
| 317 | |
| 318 #ifdef HAVE_DBM | |
| 319 static void | |
| 320 dbm_map (Lisp_Database *db, Lisp_Object func) | |
| 321 { | |
| 322 datum keydatum, valdatum; | |
| 323 Lisp_Object key, val; | |
| 324 | |
| 325 for (keydatum = dbm_firstkey (db->dbm_handle); | |
| 326 keydatum.dptr != NULL; | |
| 327 keydatum = dbm_nextkey (db->dbm_handle)) | |
| 328 { | |
| 329 valdatum = dbm_fetch (db->dbm_handle, keydatum); | |
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330 key = make_extstring ((Extbyte *) keydatum.dptr, keydatum.dsize, |
| 771 | 331 db->coding_system); |
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332 val = make_extstring ((Extbyte *) valdatum.dptr, valdatum.dsize, |
| 771 | 333 db->coding_system); |
| 428 | 334 call2 (func, key, val); |
| 335 } | |
| 336 } | |
| 337 | |
| 338 static Lisp_Object | |
| 339 dbm_get (Lisp_Database *db, Lisp_Object key) | |
| 340 { | |
| 341 datum keydatum, valdatum; | |
| 342 | |
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343 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.dptr, keydatum.dsize, |
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344 db->coding_system); |
| 428 | 345 valdatum = dbm_fetch (db->dbm_handle, keydatum); |
| 346 | |
| 347 return (valdatum.dptr | |
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348 ? make_extstring ((Extbyte *) valdatum.dptr, valdatum.dsize, |
| 771 | 349 db->coding_system) |
| 428 | 350 : Qnil); |
| 351 } | |
| 352 | |
| 353 static int | |
| 354 dbm_put (Lisp_Database *db, | |
| 355 Lisp_Object key, Lisp_Object val, Lisp_Object replace) | |
| 356 { | |
| 357 datum keydatum, valdatum; | |
| 358 | |
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359 LISP_STRING_TO_SIZED_EXTERNAL (val, valdatum.dptr, valdatum.dsize, |
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360 db->coding_system); |
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361 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.dptr, keydatum.dsize, |
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362 db->coding_system); |
| 428 | 363 |
| 364 return !dbm_store (db->dbm_handle, keydatum, valdatum, | |
| 365 NILP (replace) ? DBM_INSERT : DBM_REPLACE); | |
| 366 } | |
| 367 | |
| 368 static int | |
| 369 dbm_remove (Lisp_Database *db, Lisp_Object key) | |
| 370 { | |
| 371 datum keydatum; | |
| 372 | |
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373 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.dptr, keydatum.dsize, |
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374 db->coding_system); |
| 428 | 375 |
| 376 return dbm_delete (db->dbm_handle, keydatum); | |
| 377 } | |
| 378 | |
| 379 static Lisp_Object | |
| 2494 | 380 dbm_type (Lisp_Database *UNUSED (db)) |
| 428 | 381 { |
| 382 return Qdbm; | |
| 383 } | |
| 384 | |
| 385 static Lisp_Object | |
| 2494 | 386 dbm_subtype (Lisp_Database *UNUSED (db)) |
| 428 | 387 { |
| 388 return Qnil; | |
| 389 } | |
| 390 | |
| 391 static Lisp_Object | |
| 392 dbm_lasterr (Lisp_Database *db) | |
| 393 { | |
| 394 return lisp_strerror (db->dberrno); | |
| 395 } | |
| 396 | |
| 397 static void | |
| 398 dbm_closeit (Lisp_Database *db) | |
| 399 { | |
| 400 if (db->dbm_handle) | |
| 401 { | |
| 402 dbm_close (db->dbm_handle); | |
| 403 db->dbm_handle = NULL; | |
| 404 } | |
| 405 } | |
| 406 | |
| 407 static DB_FUNCS ndbm_func_block = | |
| 408 { | |
| 409 dbm_subtype, | |
| 410 dbm_type, | |
| 411 dbm_get, | |
| 412 dbm_put, | |
| 413 dbm_remove, | |
| 414 dbm_map, | |
| 415 dbm_closeit, | |
| 416 dbm_lasterr | |
| 417 }; | |
| 418 #endif /* HAVE_DBM */ | |
| 419 | |
| 420 #ifdef HAVE_BERKELEY_DB | |
| 421 static Lisp_Object | |
| 2286 | 422 berkdb_type (Lisp_Database *UNUSED (db)) |
| 428 | 423 { |
| 424 return Qberkeley_db; | |
| 425 } | |
| 426 | |
| 427 static Lisp_Object | |
| 428 berkdb_subtype (Lisp_Database *db) | |
| 429 { | |
| 430 if (!db->db_handle) | |
| 431 return Qnil; | |
| 432 | |
| 433 switch (db->db_handle->type) | |
| 434 { | |
| 435 case DB_BTREE: return Qbtree; | |
| 436 case DB_HASH: return Qhash; | |
| 437 case DB_RECNO: return Qrecno; | |
| 448 | 438 #if DB_VERSION_MAJOR > 2 |
| 439 case DB_QUEUE: return Qqueue; | |
| 440 #endif | |
| 428 | 441 default: return Qunknown; |
| 442 } | |
| 443 } | |
| 444 | |
| 445 static Lisp_Object | |
| 446 berkdb_lasterr (Lisp_Database *db) | |
| 447 { | |
| 448 return lisp_strerror (db->dberrno); | |
| 449 } | |
| 450 | |
| 451 static Lisp_Object | |
| 452 berkdb_get (Lisp_Database *db, Lisp_Object key) | |
| 453 { | |
| 454 DBT keydatum, valdatum; | |
| 455 int status = 0; | |
| 456 | |
| 457 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 458 xzero (keydatum); | |
| 459 xzero (valdatum); | |
| 460 | |
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461 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.data, keydatum.size, |
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462 db->coding_system); |
| 428 | 463 |
| 464 #if DB_VERSION_MAJOR == 1 | |
| 465 status = db->db_handle->get (db->db_handle, &keydatum, &valdatum, 0); | |
| 466 #else | |
| 467 status = db->db_handle->get (db->db_handle, NULL, &keydatum, &valdatum, 0); | |
| 468 #endif /* DB_VERSION_MAJOR */ | |
| 469 | |
| 470 if (!status) | |
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471 return make_extstring ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 472 db->coding_system); |
| 428 | 473 |
| 474 #if DB_VERSION_MAJOR == 1 | |
| 475 db->dberrno = (status == 1) ? -1 : errno; | |
| 476 #else | |
| 477 db->dberrno = (status < 0) ? -1 : errno; | |
| 478 #endif /* DB_VERSION_MAJOR */ | |
| 479 | |
| 480 return Qnil; | |
| 481 } | |
| 482 | |
| 483 static int | |
| 484 berkdb_put (Lisp_Database *db, | |
| 485 Lisp_Object key, | |
| 486 Lisp_Object val, | |
| 487 Lisp_Object replace) | |
| 488 { | |
| 489 DBT keydatum, valdatum; | |
| 490 int status = 0; | |
| 491 | |
| 492 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 493 xzero (keydatum); | |
| 494 xzero (valdatum); | |
| 495 | |
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496 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.data, keydatum.size, |
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497 db->coding_system); |
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498 LISP_STRING_TO_SIZED_EXTERNAL (val, valdatum.data, valdatum.size, |
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499 db->coding_system); |
| 428 | 500 #if DB_VERSION_MAJOR == 1 |
| 501 status = db->db_handle->put (db->db_handle, &keydatum, &valdatum, | |
| 502 NILP (replace) ? R_NOOVERWRITE : 0); | |
| 503 db->dberrno = (status == 1) ? -1 : errno; | |
| 504 #else | |
| 505 status = db->db_handle->put (db->db_handle, NULL, &keydatum, &valdatum, | |
| 506 NILP (replace) ? DB_NOOVERWRITE : 0); | |
| 507 db->dberrno = (status < 0) ? -1 : errno; | |
| 508 #endif/* DV_VERSION_MAJOR = 2 */ | |
| 509 | |
| 510 return status; | |
| 511 } | |
| 512 | |
| 513 static int | |
| 514 berkdb_remove (Lisp_Database *db, Lisp_Object key) | |
| 515 { | |
| 516 DBT keydatum; | |
| 517 int status; | |
| 518 | |
| 519 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 520 xzero (keydatum); | |
| 521 | |
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522 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.data, keydatum.size, |
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523 db->coding_system); |
| 428 | 524 |
| 525 #if DB_VERSION_MAJOR == 1 | |
| 526 status = db->db_handle->del (db->db_handle, &keydatum, 0); | |
| 527 #else | |
| 528 status = db->db_handle->del (db->db_handle, NULL, &keydatum, 0); | |
| 529 #endif /* DB_VERSION_MAJOR */ | |
| 530 | |
| 531 if (!status) | |
| 532 return 0; | |
| 533 | |
| 534 #if DB_VERSION_MAJOR == 1 | |
| 535 db->dberrno = (status == 1) ? -1 : errno; | |
| 536 #else | |
| 537 db->dberrno = (status < 0) ? -1 : errno; | |
| 538 #endif /* DB_VERSION_MAJOR */ | |
| 539 | |
| 540 return 1; | |
| 541 } | |
| 542 | |
| 543 static void | |
| 544 berkdb_map (Lisp_Database *db, Lisp_Object func) | |
| 545 { | |
| 546 DBT keydatum, valdatum; | |
| 547 Lisp_Object key, val; | |
| 548 DB *dbp = db->db_handle; | |
| 549 int status; | |
| 550 | |
| 551 xzero (keydatum); | |
| 552 xzero (valdatum); | |
| 553 | |
| 554 #if DB_VERSION_MAJOR == 1 | |
| 555 for (status = dbp->seq (dbp, &keydatum, &valdatum, R_FIRST); | |
| 556 status == 0; | |
| 557 status = dbp->seq (dbp, &keydatum, &valdatum, R_NEXT)) | |
| 558 { | |
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559 key = make_extstring ((const Extbyte *) keydatum.data, keydatum.size, |
| 771 | 560 db->coding_system); |
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561 val = make_extstring ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 562 db->coding_system); |
| 428 | 563 call2 (func, key, val); |
| 564 } | |
| 565 #else | |
| 566 { | |
| 567 DBC *dbcp; | |
| 568 | |
| 569 #if DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >=6 | |
| 570 status = dbp->cursor (dbp, NULL, &dbcp, 0); | |
| 571 #else | |
| 572 status = dbp->cursor (dbp, NULL, &dbcp); | |
| 440 | 573 #endif |
| 428 | 574 for (status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_FIRST); |
| 575 status == 0; | |
| 576 status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_NEXT)) | |
| 577 { | |
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578 key = make_extstring ((const Extbyte *) keydatum.data, keydatum.size, |
| 771 | 579 db->coding_system); |
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580 val = make_extstring ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 581 db->coding_system); |
| 428 | 582 call2 (func, key, val); |
| 583 } | |
| 584 dbcp->c_close (dbcp); | |
| 585 } | |
| 586 #endif /* DB_VERSION_MAJOR */ | |
| 587 } | |
| 588 | |
| 589 static void | |
| 590 berkdb_close (Lisp_Database *db) | |
| 591 { | |
| 592 if (db->db_handle) | |
| 593 { | |
| 594 #if DB_VERSION_MAJOR == 1 | |
| 595 db->db_handle->sync (db->db_handle, 0); | |
| 596 db->db_handle->close (db->db_handle); | |
| 597 #else | |
| 598 db->db_handle->sync (db->db_handle, 0); | |
| 599 db->db_handle->close (db->db_handle, 0); | |
| 600 #endif /* DB_VERSION_MAJOR */ | |
| 601 db->db_handle = NULL; | |
| 602 } | |
| 603 } | |
| 604 | |
| 605 static DB_FUNCS berk_func_block = | |
| 606 { | |
| 607 berkdb_subtype, | |
| 608 berkdb_type, | |
| 609 berkdb_get, | |
| 610 berkdb_put, | |
| 611 berkdb_remove, | |
| 612 berkdb_map, | |
| 613 berkdb_close, | |
| 614 berkdb_lasterr | |
| 615 }; | |
| 616 #endif /* HAVE_BERKELEY_DB */ | |
| 617 | |
| 618 DEFUN ("database-last-error", Fdatabase_last_error, 0, 1, 0, /* | |
| 619 Return the last error associated with DATABASE. | |
| 620 */ | |
| 621 (database)) | |
| 622 { | |
| 623 if (NILP (database)) | |
| 624 return lisp_strerror (errno); | |
| 625 | |
| 626 CHECK_DATABASE (database); | |
| 627 | |
| 628 return XDATABASE (database)->funcs->last_error (XDATABASE (database)); | |
| 629 } | |
| 630 | |
| 771 | 631 DEFUN ("open-database", Fopen_database, 1, 6, 0, /* |
| 428 | 632 Return a new database object opened on FILE. |
| 633 Optional arguments TYPE and SUBTYPE specify the database type. | |
| 634 Optional argument ACCESS specifies the access rights, which may be any | |
| 635 combination of 'r' 'w' and '+', for read, write, and creation flags. | |
| 636 Optional argument MODE gives the permissions to use when opening FILE, | |
| 637 and defaults to 0755. | |
| 771 | 638 Optional argument CODESYS specifies the coding system used to encode/decode |
| 639 data passed to/from the database, and defaults to the value of the | |
| 640 variable `database-coding-system'. | |
| 428 | 641 */ |
| 771 | 642 (file, type, subtype, access_, mode, codesys)) |
| 428 | 643 { |
| 644 /* This function can GC */ | |
| 645 int modemask; | |
| 646 int accessmask = 0; | |
| 647 Lisp_Database *db = NULL; | |
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648 Extbyte *filename; |
| 428 | 649 struct gcpro gcpro1, gcpro2; |
| 650 | |
| 651 CHECK_STRING (file); | |
| 652 GCPRO2 (file, access_); | |
| 653 file = Fexpand_file_name (file, Qnil); | |
| 654 UNGCPRO; | |
| 655 | |
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656 LISP_PATHNAME_CONVERT_OUT (file, filename); |
| 428 | 657 |
| 658 if (NILP (access_)) | |
| 659 { | |
| 660 accessmask = O_RDWR | O_CREAT; | |
| 661 } | |
| 662 else | |
| 663 { | |
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664 Ibyte *acc; |
| 428 | 665 CHECK_STRING (access_); |
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666 acc = XSTRING_DATA (access_); |
| 428 | 667 |
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668 if (qxestrchr (acc, '+')) |
| 428 | 669 accessmask |= O_CREAT; |
| 670 | |
| 671 { | |
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672 int rp = !!qxestrchr (acc, 'r'); |
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673 int wp = !!qxestrchr (acc, 'w'); |
| 428 | 674 if (rp && wp) accessmask |= O_RDWR; |
| 675 else if (wp) accessmask |= O_WRONLY; | |
| 676 else accessmask |= O_RDONLY; | |
| 677 } | |
| 678 } | |
| 679 | |
| 680 if (NILP (mode)) | |
| 681 { | |
| 682 modemask = 0755; /* rwxr-xr-x */ | |
| 683 } | |
| 684 else | |
| 685 { | |
| 686 CHECK_INT (mode); | |
| 687 modemask = XINT (mode); | |
| 688 } | |
| 689 | |
| 771 | 690 if (NILP (codesys)) |
| 691 codesys = Vdatabase_coding_system; | |
| 692 | |
|
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693 codesys = get_coding_system_for_text_file (codesys, 0); |
| 771 | 694 |
| 428 | 695 #ifdef HAVE_DBM |
| 696 if (NILP (type) || EQ (type, Qdbm)) | |
| 697 { | |
| 698 DBM *dbase = dbm_open (filename, accessmask, modemask); | |
| 699 if (!dbase) | |
| 700 return Qnil; | |
| 701 | |
| 702 db = allocate_database (); | |
| 703 db->dbm_handle = dbase; | |
| 704 db->funcs = &ndbm_func_block; | |
| 771 | 705 db->coding_system = codesys; |
| 428 | 706 goto db_done; |
| 707 } | |
| 708 #endif /* HAVE_DBM */ | |
| 709 | |
| 710 #ifdef HAVE_BERKELEY_DB | |
| 711 if (NILP (type) || EQ (type, Qberkeley_db)) | |
| 712 { | |
| 713 DBTYPE real_subtype; | |
| 714 DB *dbase; | |
| 715 #if DB_VERSION_MAJOR != 1 | |
| 716 int status; | |
| 717 #endif | |
| 718 | |
| 719 if (EQ (subtype, Qhash) || NILP (subtype)) | |
| 720 real_subtype = DB_HASH; | |
| 721 else if (EQ (subtype, Qbtree)) | |
| 722 real_subtype = DB_BTREE; | |
| 723 else if (EQ (subtype, Qrecno)) | |
| 724 real_subtype = DB_RECNO; | |
| 448 | 725 #if DB_VERSION_MAJOR > 2 |
| 726 else if (EQ (subtype, Qqueue)) | |
| 727 real_subtype = DB_QUEUE; | |
| 728 #endif | |
| 428 | 729 else |
| 563 | 730 invalid_constant ("Unsupported subtype", subtype); |
| 428 | 731 |
| 732 #if DB_VERSION_MAJOR == 1 | |
| 733 dbase = dbopen (filename, accessmask, modemask, real_subtype, NULL); | |
| 734 if (!dbase) | |
| 735 return Qnil; | |
| 736 #else | |
| 737 /* Berkeley DB Version 2 has only the accessmask DB_CREATE and DB_RDONLY, | |
| 738 other flags shouldn't be set */ | |
| 739 if (NILP (access_)) | |
| 740 accessmask = DB_CREATE; | |
| 741 else | |
| 742 { | |
| 743 char *acc; | |
| 744 CHECK_STRING (access_); | |
| 745 acc = (char *) XSTRING_DATA (access_); | |
| 746 accessmask = 0; | |
| 747 | |
| 748 if (strchr (acc, '+')) | |
| 749 accessmask |= DB_CREATE; | |
| 750 | |
| 751 if (strchr (acc, 'r') && !strchr (acc, 'w')) | |
| 752 accessmask |= DB_RDONLY; | |
| 753 } | |
| 448 | 754 #if DB_VERSION_MAJOR == 2 |
| 428 | 755 status = db_open (filename, real_subtype, accessmask, |
| 756 modemask, NULL , NULL, &dbase); | |
| 757 if (status) | |
| 758 return Qnil; | |
| 448 | 759 #else |
| 760 status = db_create (&dbase, NULL, 0); | |
| 761 if (status) | |
| 762 return Qnil; | |
| 1141 | 763 #if DB_VERSION_MAJOR < 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR < 1) |
| 448 | 764 status = dbase->open (dbase, filename, NULL, |
| 765 real_subtype, accessmask, modemask); | |
| 1141 | 766 #else /* DB_VERSION >= 4.1 */ |
| 1377 | 767 /* You can't use DB_AUTO_COMMIT unless you have a txn environment. */ |
| 1141 | 768 status = dbase->open (dbase, NULL, filename, NULL, real_subtype, |
| 1377 | 769 accessmask, modemask); |
| 1141 | 770 #endif /* DB_VERSION < 4.1 */ |
| 448 | 771 if (status) |
| 772 { | |
| 773 dbase->close (dbase, 0); | |
| 774 return Qnil; | |
| 775 } | |
| 776 #endif /* DB_VERSION_MAJOR > 2 */ | |
| 777 /* Normalize into system specific file modes. Only for printing */ | |
| 778 accessmask = accessmask & DB_RDONLY ? O_RDONLY : O_RDWR; | |
| 428 | 779 #endif /* DB_VERSION_MAJOR */ |
| 780 | |
| 781 db = allocate_database (); | |
| 782 db->db_handle = dbase; | |
| 783 db->funcs = &berk_func_block; | |
| 771 | 784 db->coding_system = codesys; |
| 428 | 785 goto db_done; |
| 786 } | |
| 787 #endif /* HAVE_BERKELEY_DB */ | |
| 788 | |
| 563 | 789 invalid_constant ("Unsupported database type", type); |
| 428 | 790 return Qnil; |
| 791 | |
| 792 db_done: | |
| 793 db->live_p = 1; | |
| 794 db->fname = file; | |
| 795 db->mode = modemask; | |
| 796 db->access_ = accessmask; | |
| 797 | |
| 793 | 798 return wrap_database (db); |
| 428 | 799 } |
| 800 | |
| 801 DEFUN ("put-database", Fput_database, 3, 4, 0, /* | |
| 802 Store KEY and VALUE in DATABASE. | |
| 803 If optional fourth arg REPLACE is non-nil, | |
| 804 replace any existing entry in the database. | |
| 805 */ | |
| 806 (key, value, database, replace)) | |
| 807 { | |
| 808 CHECK_LIVE_DATABASE (database); | |
| 809 CHECK_STRING (key); | |
| 810 CHECK_STRING (value); | |
| 811 { | |
| 812 Lisp_Database *db = XDATABASE (database); | |
| 813 int status = db->funcs->put (db, key, value, replace); | |
| 814 return status ? Qt : Qnil; | |
| 815 } | |
| 816 } | |
| 817 | |
| 818 DEFUN ("remove-database", Fremove_database, 2, 2, 0, /* | |
| 819 Remove KEY from DATABASE. | |
| 820 */ | |
| 821 (key, database)) | |
| 822 { | |
| 823 CHECK_LIVE_DATABASE (database); | |
| 824 CHECK_STRING (key); | |
| 825 { | |
| 826 Lisp_Database *db = XDATABASE (database); | |
| 827 int status = db->funcs->rem (db, key); | |
| 828 return status ? Qt : Qnil; | |
| 829 } | |
| 830 } | |
| 831 | |
| 832 DEFUN ("get-database", Fget_database, 2, 3, 0, /* | |
| 833 Return value for KEY in DATABASE. | |
| 834 If there is no corresponding value, return DEFAULT (defaults to nil). | |
| 835 */ | |
| 836 (key, database, default_)) | |
| 837 { | |
| 838 CHECK_LIVE_DATABASE (database); | |
| 839 CHECK_STRING (key); | |
| 840 { | |
| 841 Lisp_Database *db = XDATABASE (database); | |
| 842 Lisp_Object retval = db->funcs->get (db, key); | |
| 843 return NILP (retval) ? default_ : retval; | |
| 844 } | |
| 845 } | |
| 846 | |
| 847 DEFUN ("map-database", Fmapdatabase, 2, 2, 0, /* | |
| 848 Map FUNCTION over entries in DATABASE, calling it with two args, | |
| 849 each key and value in the database. | |
| 850 */ | |
| 851 (function, database)) | |
| 852 { | |
| 853 CHECK_LIVE_DATABASE (database); | |
| 854 | |
| 855 XDATABASE (database)->funcs->map (XDATABASE (database), function); | |
| 856 | |
| 857 return Qnil; | |
| 858 } | |
| 859 | |
| 860 void | |
| 861 syms_of_database (void) | |
| 862 { | |
| 442 | 863 INIT_LRECORD_IMPLEMENTATION (database); |
| 864 | |
| 563 | 865 DEFSYMBOL (Qdatabasep); |
| 428 | 866 #ifdef HAVE_DBM |
| 563 | 867 DEFSYMBOL (Qdbm); |
| 428 | 868 #endif |
| 869 #ifdef HAVE_BERKELEY_DB | |
| 563 | 870 DEFSYMBOL (Qberkeley_db); |
| 871 DEFSYMBOL (Qhash); | |
| 872 DEFSYMBOL (Qbtree); | |
| 873 DEFSYMBOL (Qrecno); | |
| 448 | 874 #if DB_VERSION_MAJOR > 2 |
| 563 | 875 DEFSYMBOL (Qqueue); |
| 448 | 876 #endif |
| 563 | 877 DEFSYMBOL (Qunknown); |
| 428 | 878 #endif |
| 879 | |
| 880 DEFSUBR (Fopen_database); | |
| 881 DEFSUBR (Fdatabasep); | |
| 882 DEFSUBR (Fmapdatabase); | |
| 883 DEFSUBR (Fput_database); | |
| 884 DEFSUBR (Fget_database); | |
| 885 DEFSUBR (Fremove_database); | |
| 886 DEFSUBR (Fdatabase_type); | |
| 887 DEFSUBR (Fdatabase_subtype); | |
| 888 DEFSUBR (Fdatabase_last_error); | |
| 889 DEFSUBR (Fdatabase_live_p); | |
| 890 DEFSUBR (Fdatabase_file_name); | |
| 891 DEFSUBR (Fclose_database); | |
| 892 } | |
| 893 | |
| 894 void | |
| 895 vars_of_database (void) | |
| 896 { | |
| 897 #ifdef HAVE_DBM | |
| 898 Fprovide (Qdbm); | |
| 899 #endif | |
| 900 #ifdef HAVE_BERKELEY_DB | |
| 901 Fprovide (Qberkeley_db); | |
| 902 #endif | |
| 903 | |
| 904 DEFVAR_LISP ("database-coding-system", &Vdatabase_coding_system /* | |
| 771 | 905 Default coding system used to convert data in database files. |
| 428 | 906 */ ); |
| 771 | 907 Vdatabase_coding_system = Qnative; |
| 428 | 908 } |