Mercurial > hg > xemacs-beta
annotate src/database.c @ 4907:9e7f5a77cc84
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| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Mon, 01 Feb 2010 01:05:28 -0600 |
| parents | a98ca4640147 |
| children | 304aebb79cd3 |
| 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 CYGWIN_HEADERS |
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89 |
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90 #if defined(__cplusplus) || defined(c_plusplus) |
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91 extern "C" { |
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92 #endif |
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93 |
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94 /* As of Cygwin 1.7.0, the prototypes in ndbm.h are broken when compiling |
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95 using C++, since they are of the form `datum dbm_firstkey()', without any |
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96 args given. */ |
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97 /* Parameters to dbm_store for simple insertion or replacement. */ |
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98 #define DBM_INSERT 0 |
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99 #define DBM_REPLACE 1 |
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100 |
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101 |
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102 /* The data and key structure. This structure is defined for compatibility. */ |
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103 typedef struct { |
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104 char *dptr; |
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105 int dsize; |
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106 } datum; |
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107 |
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108 |
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109 /* The file information header. This is good enough for most applications. */ |
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110 typedef struct {int dummy[10];} DBM; |
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111 |
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112 int dbm_clearerr(DBM *); |
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113 void dbm_close(DBM *); |
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114 int dbm_delete(DBM *, datum); |
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115 int dbm_error(DBM *); |
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116 datum dbm_fetch(DBM *, datum); |
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117 datum dbm_firstkey(DBM *); |
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118 datum dbm_nextkey(DBM *); |
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119 DBM *dbm_open(const char *, int, mode_t); |
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120 int dbm_store(DBM *, datum, datum, int); |
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121 |
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122 #if defined(__cplusplus) || defined(c_plusplus) |
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123 } |
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124 #endif |
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125 |
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126 #else |
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127 #include NDBM_H_FILE |
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128 #endif |
| 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); | |
| 4124 | 330 key = make_ext_string ((Extbyte *) keydatum.dptr, keydatum.dsize, |
| 771 | 331 db->coding_system); |
| 4124 | 332 val = make_ext_string ((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 | |
| 771 | 343 TO_EXTERNAL_FORMAT (LISP_STRING, key, |
| 344 ALLOCA, (keydatum.dptr, keydatum.dsize), | |
| 345 db->coding_system); | |
| 428 | 346 valdatum = dbm_fetch (db->dbm_handle, keydatum); |
| 347 | |
| 348 return (valdatum.dptr | |
| 4124 | 349 ? make_ext_string ((Extbyte *) valdatum.dptr, valdatum.dsize, |
| 771 | 350 db->coding_system) |
| 428 | 351 : Qnil); |
| 352 } | |
| 353 | |
| 354 static int | |
| 355 dbm_put (Lisp_Database *db, | |
| 356 Lisp_Object key, Lisp_Object val, Lisp_Object replace) | |
| 357 { | |
| 358 datum keydatum, valdatum; | |
| 359 | |
| 771 | 360 TO_EXTERNAL_FORMAT (LISP_STRING, val, |
| 361 ALLOCA, (valdatum.dptr, valdatum.dsize), | |
| 362 db->coding_system); | |
| 363 TO_EXTERNAL_FORMAT (LISP_STRING, key, | |
| 364 ALLOCA, (keydatum.dptr, keydatum.dsize), | |
| 365 db->coding_system); | |
| 428 | 366 |
| 367 return !dbm_store (db->dbm_handle, keydatum, valdatum, | |
| 368 NILP (replace) ? DBM_INSERT : DBM_REPLACE); | |
| 369 } | |
| 370 | |
| 371 static int | |
| 372 dbm_remove (Lisp_Database *db, Lisp_Object key) | |
| 373 { | |
| 374 datum keydatum; | |
| 375 | |
| 771 | 376 TO_EXTERNAL_FORMAT (LISP_STRING, key, |
| 377 ALLOCA, (keydatum.dptr, keydatum.dsize), | |
| 378 db->coding_system); | |
| 428 | 379 |
| 380 return dbm_delete (db->dbm_handle, keydatum); | |
| 381 } | |
| 382 | |
| 383 static Lisp_Object | |
| 2494 | 384 dbm_type (Lisp_Database *UNUSED (db)) |
| 428 | 385 { |
| 386 return Qdbm; | |
| 387 } | |
| 388 | |
| 389 static Lisp_Object | |
| 2494 | 390 dbm_subtype (Lisp_Database *UNUSED (db)) |
| 428 | 391 { |
| 392 return Qnil; | |
| 393 } | |
| 394 | |
| 395 static Lisp_Object | |
| 396 dbm_lasterr (Lisp_Database *db) | |
| 397 { | |
| 398 return lisp_strerror (db->dberrno); | |
| 399 } | |
| 400 | |
| 401 static void | |
| 402 dbm_closeit (Lisp_Database *db) | |
| 403 { | |
| 404 if (db->dbm_handle) | |
| 405 { | |
| 406 dbm_close (db->dbm_handle); | |
| 407 db->dbm_handle = NULL; | |
| 408 } | |
| 409 } | |
| 410 | |
| 411 static DB_FUNCS ndbm_func_block = | |
| 412 { | |
| 413 dbm_subtype, | |
| 414 dbm_type, | |
| 415 dbm_get, | |
| 416 dbm_put, | |
| 417 dbm_remove, | |
| 418 dbm_map, | |
| 419 dbm_closeit, | |
| 420 dbm_lasterr | |
| 421 }; | |
| 422 #endif /* HAVE_DBM */ | |
| 423 | |
| 424 #ifdef HAVE_BERKELEY_DB | |
| 425 static Lisp_Object | |
| 2286 | 426 berkdb_type (Lisp_Database *UNUSED (db)) |
| 428 | 427 { |
| 428 return Qberkeley_db; | |
| 429 } | |
| 430 | |
| 431 static Lisp_Object | |
| 432 berkdb_subtype (Lisp_Database *db) | |
| 433 { | |
| 434 if (!db->db_handle) | |
| 435 return Qnil; | |
| 436 | |
| 437 switch (db->db_handle->type) | |
| 438 { | |
| 439 case DB_BTREE: return Qbtree; | |
| 440 case DB_HASH: return Qhash; | |
| 441 case DB_RECNO: return Qrecno; | |
| 448 | 442 #if DB_VERSION_MAJOR > 2 |
| 443 case DB_QUEUE: return Qqueue; | |
| 444 #endif | |
| 428 | 445 default: return Qunknown; |
| 446 } | |
| 447 } | |
| 448 | |
| 449 static Lisp_Object | |
| 450 berkdb_lasterr (Lisp_Database *db) | |
| 451 { | |
| 452 return lisp_strerror (db->dberrno); | |
| 453 } | |
| 454 | |
| 455 static Lisp_Object | |
| 456 berkdb_get (Lisp_Database *db, Lisp_Object key) | |
| 457 { | |
| 458 DBT keydatum, valdatum; | |
| 459 int status = 0; | |
| 460 | |
| 461 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 462 xzero (keydatum); | |
| 463 xzero (valdatum); | |
| 464 | |
| 771 | 465 TO_EXTERNAL_FORMAT (LISP_STRING, key, |
| 466 ALLOCA, (keydatum.data, keydatum.size), | |
| 467 db->coding_system); | |
| 428 | 468 |
| 469 #if DB_VERSION_MAJOR == 1 | |
| 470 status = db->db_handle->get (db->db_handle, &keydatum, &valdatum, 0); | |
| 471 #else | |
| 472 status = db->db_handle->get (db->db_handle, NULL, &keydatum, &valdatum, 0); | |
| 473 #endif /* DB_VERSION_MAJOR */ | |
| 474 | |
| 475 if (!status) | |
| 1645 | 476 return make_ext_string ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 477 db->coding_system); |
| 428 | 478 |
| 479 #if DB_VERSION_MAJOR == 1 | |
| 480 db->dberrno = (status == 1) ? -1 : errno; | |
| 481 #else | |
| 482 db->dberrno = (status < 0) ? -1 : errno; | |
| 483 #endif /* DB_VERSION_MAJOR */ | |
| 484 | |
| 485 return Qnil; | |
| 486 } | |
| 487 | |
| 488 static int | |
| 489 berkdb_put (Lisp_Database *db, | |
| 490 Lisp_Object key, | |
| 491 Lisp_Object val, | |
| 492 Lisp_Object replace) | |
| 493 { | |
| 494 DBT keydatum, valdatum; | |
| 495 int status = 0; | |
| 496 | |
| 497 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 498 xzero (keydatum); | |
| 499 xzero (valdatum); | |
| 500 | |
| 771 | 501 TO_EXTERNAL_FORMAT (LISP_STRING, key, |
| 502 ALLOCA, (keydatum.data, keydatum.size), | |
| 503 db->coding_system); | |
| 504 TO_EXTERNAL_FORMAT (LISP_STRING, val, | |
| 505 ALLOCA, (valdatum.data, valdatum.size), | |
| 506 db->coding_system); | |
| 428 | 507 #if DB_VERSION_MAJOR == 1 |
| 508 status = db->db_handle->put (db->db_handle, &keydatum, &valdatum, | |
| 509 NILP (replace) ? R_NOOVERWRITE : 0); | |
| 510 db->dberrno = (status == 1) ? -1 : errno; | |
| 511 #else | |
| 512 status = db->db_handle->put (db->db_handle, NULL, &keydatum, &valdatum, | |
| 513 NILP (replace) ? DB_NOOVERWRITE : 0); | |
| 514 db->dberrno = (status < 0) ? -1 : errno; | |
| 515 #endif/* DV_VERSION_MAJOR = 2 */ | |
| 516 | |
| 517 return status; | |
| 518 } | |
| 519 | |
| 520 static int | |
| 521 berkdb_remove (Lisp_Database *db, Lisp_Object key) | |
| 522 { | |
| 523 DBT keydatum; | |
| 524 int status; | |
| 525 | |
| 526 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 527 xzero (keydatum); | |
| 528 | |
| 771 | 529 TO_EXTERNAL_FORMAT (LISP_STRING, key, |
| 530 ALLOCA, (keydatum.data, keydatum.size), | |
| 531 db->coding_system); | |
| 428 | 532 |
| 533 #if DB_VERSION_MAJOR == 1 | |
| 534 status = db->db_handle->del (db->db_handle, &keydatum, 0); | |
| 535 #else | |
| 536 status = db->db_handle->del (db->db_handle, NULL, &keydatum, 0); | |
| 537 #endif /* DB_VERSION_MAJOR */ | |
| 538 | |
| 539 if (!status) | |
| 540 return 0; | |
| 541 | |
| 542 #if DB_VERSION_MAJOR == 1 | |
| 543 db->dberrno = (status == 1) ? -1 : errno; | |
| 544 #else | |
| 545 db->dberrno = (status < 0) ? -1 : errno; | |
| 546 #endif /* DB_VERSION_MAJOR */ | |
| 547 | |
| 548 return 1; | |
| 549 } | |
| 550 | |
| 551 static void | |
| 552 berkdb_map (Lisp_Database *db, Lisp_Object func) | |
| 553 { | |
| 554 DBT keydatum, valdatum; | |
| 555 Lisp_Object key, val; | |
| 556 DB *dbp = db->db_handle; | |
| 557 int status; | |
| 558 | |
| 559 xzero (keydatum); | |
| 560 xzero (valdatum); | |
| 561 | |
| 562 #if DB_VERSION_MAJOR == 1 | |
| 563 for (status = dbp->seq (dbp, &keydatum, &valdatum, R_FIRST); | |
| 564 status == 0; | |
| 565 status = dbp->seq (dbp, &keydatum, &valdatum, R_NEXT)) | |
| 566 { | |
| 2646 | 567 key = make_ext_string ((const Extbyte *) keydatum.data, keydatum.size, |
| 771 | 568 db->coding_system); |
| 2646 | 569 val = make_ext_string ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 570 db->coding_system); |
| 428 | 571 call2 (func, key, val); |
| 572 } | |
| 573 #else | |
| 574 { | |
| 575 DBC *dbcp; | |
| 576 | |
| 577 #if DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >=6 | |
| 578 status = dbp->cursor (dbp, NULL, &dbcp, 0); | |
| 579 #else | |
| 580 status = dbp->cursor (dbp, NULL, &dbcp); | |
| 440 | 581 #endif |
| 428 | 582 for (status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_FIRST); |
| 583 status == 0; | |
| 584 status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_NEXT)) | |
| 585 { | |
| 1645 | 586 key = make_ext_string ((const Extbyte *) keydatum.data, keydatum.size, |
| 771 | 587 db->coding_system); |
| 1645 | 588 val = make_ext_string ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 589 db->coding_system); |
| 428 | 590 call2 (func, key, val); |
| 591 } | |
| 592 dbcp->c_close (dbcp); | |
| 593 } | |
| 594 #endif /* DB_VERSION_MAJOR */ | |
| 595 } | |
| 596 | |
| 597 static void | |
| 598 berkdb_close (Lisp_Database *db) | |
| 599 { | |
| 600 if (db->db_handle) | |
| 601 { | |
| 602 #if DB_VERSION_MAJOR == 1 | |
| 603 db->db_handle->sync (db->db_handle, 0); | |
| 604 db->db_handle->close (db->db_handle); | |
| 605 #else | |
| 606 db->db_handle->sync (db->db_handle, 0); | |
| 607 db->db_handle->close (db->db_handle, 0); | |
| 608 #endif /* DB_VERSION_MAJOR */ | |
| 609 db->db_handle = NULL; | |
| 610 } | |
| 611 } | |
| 612 | |
| 613 static DB_FUNCS berk_func_block = | |
| 614 { | |
| 615 berkdb_subtype, | |
| 616 berkdb_type, | |
| 617 berkdb_get, | |
| 618 berkdb_put, | |
| 619 berkdb_remove, | |
| 620 berkdb_map, | |
| 621 berkdb_close, | |
| 622 berkdb_lasterr | |
| 623 }; | |
| 624 #endif /* HAVE_BERKELEY_DB */ | |
| 625 | |
| 626 DEFUN ("database-last-error", Fdatabase_last_error, 0, 1, 0, /* | |
| 627 Return the last error associated with DATABASE. | |
| 628 */ | |
| 629 (database)) | |
| 630 { | |
| 631 if (NILP (database)) | |
| 632 return lisp_strerror (errno); | |
| 633 | |
| 634 CHECK_DATABASE (database); | |
| 635 | |
| 636 return XDATABASE (database)->funcs->last_error (XDATABASE (database)); | |
| 637 } | |
| 638 | |
| 771 | 639 DEFUN ("open-database", Fopen_database, 1, 6, 0, /* |
| 428 | 640 Return a new database object opened on FILE. |
| 641 Optional arguments TYPE and SUBTYPE specify the database type. | |
| 642 Optional argument ACCESS specifies the access rights, which may be any | |
| 643 combination of 'r' 'w' and '+', for read, write, and creation flags. | |
| 644 Optional argument MODE gives the permissions to use when opening FILE, | |
| 645 and defaults to 0755. | |
| 771 | 646 Optional argument CODESYS specifies the coding system used to encode/decode |
| 647 data passed to/from the database, and defaults to the value of the | |
| 648 variable `database-coding-system'. | |
| 428 | 649 */ |
| 771 | 650 (file, type, subtype, access_, mode, codesys)) |
| 428 | 651 { |
| 652 /* This function can GC */ | |
| 653 int modemask; | |
| 654 int accessmask = 0; | |
| 655 Lisp_Database *db = NULL; | |
| 656 char *filename; | |
| 657 struct gcpro gcpro1, gcpro2; | |
| 658 | |
| 659 CHECK_STRING (file); | |
| 660 GCPRO2 (file, access_); | |
| 661 file = Fexpand_file_name (file, Qnil); | |
| 662 UNGCPRO; | |
| 663 | |
| 440 | 664 TO_EXTERNAL_FORMAT (LISP_STRING, file, |
| 665 C_STRING_ALLOCA, filename, | |
| 666 Qfile_name); | |
| 428 | 667 |
| 668 if (NILP (access_)) | |
| 669 { | |
| 670 accessmask = O_RDWR | O_CREAT; | |
| 671 } | |
| 672 else | |
| 673 { | |
| 674 char *acc; | |
| 675 CHECK_STRING (access_); | |
| 676 acc = (char *) XSTRING_DATA (access_); | |
| 677 | |
| 678 if (strchr (acc, '+')) | |
| 679 accessmask |= O_CREAT; | |
| 680 | |
| 681 { | |
| 682 char *rp = strchr (acc, 'r'); | |
| 683 char *wp = strchr (acc, 'w'); | |
| 684 if (rp && wp) accessmask |= O_RDWR; | |
| 685 else if (wp) accessmask |= O_WRONLY; | |
| 686 else accessmask |= O_RDONLY; | |
| 687 } | |
| 688 } | |
| 689 | |
| 690 if (NILP (mode)) | |
| 691 { | |
| 692 modemask = 0755; /* rwxr-xr-x */ | |
| 693 } | |
| 694 else | |
| 695 { | |
| 696 CHECK_INT (mode); | |
| 697 modemask = XINT (mode); | |
| 698 } | |
| 699 | |
| 771 | 700 if (NILP (codesys)) |
| 701 codesys = Vdatabase_coding_system; | |
| 702 | |
|
4351
bc3b9f61018e
Respect the CODESYS argument in #'open-database; don't autodetect EOL.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4124
diff
changeset
|
703 codesys = get_coding_system_for_text_file (codesys, 0); |
| 771 | 704 |
| 428 | 705 #ifdef HAVE_DBM |
| 706 if (NILP (type) || EQ (type, Qdbm)) | |
| 707 { | |
| 708 DBM *dbase = dbm_open (filename, accessmask, modemask); | |
| 709 if (!dbase) | |
| 710 return Qnil; | |
| 711 | |
| 712 db = allocate_database (); | |
| 713 db->dbm_handle = dbase; | |
| 714 db->funcs = &ndbm_func_block; | |
| 771 | 715 db->coding_system = codesys; |
| 428 | 716 goto db_done; |
| 717 } | |
| 718 #endif /* HAVE_DBM */ | |
| 719 | |
| 720 #ifdef HAVE_BERKELEY_DB | |
| 721 if (NILP (type) || EQ (type, Qberkeley_db)) | |
| 722 { | |
| 723 DBTYPE real_subtype; | |
| 724 DB *dbase; | |
| 725 #if DB_VERSION_MAJOR != 1 | |
| 726 int status; | |
| 727 #endif | |
| 728 | |
| 729 if (EQ (subtype, Qhash) || NILP (subtype)) | |
| 730 real_subtype = DB_HASH; | |
| 731 else if (EQ (subtype, Qbtree)) | |
| 732 real_subtype = DB_BTREE; | |
| 733 else if (EQ (subtype, Qrecno)) | |
| 734 real_subtype = DB_RECNO; | |
| 448 | 735 #if DB_VERSION_MAJOR > 2 |
| 736 else if (EQ (subtype, Qqueue)) | |
| 737 real_subtype = DB_QUEUE; | |
| 738 #endif | |
| 428 | 739 else |
| 563 | 740 invalid_constant ("Unsupported subtype", subtype); |
| 428 | 741 |
| 742 #if DB_VERSION_MAJOR == 1 | |
| 743 dbase = dbopen (filename, accessmask, modemask, real_subtype, NULL); | |
| 744 if (!dbase) | |
| 745 return Qnil; | |
| 746 #else | |
| 747 /* Berkeley DB Version 2 has only the accessmask DB_CREATE and DB_RDONLY, | |
| 748 other flags shouldn't be set */ | |
| 749 if (NILP (access_)) | |
| 750 accessmask = DB_CREATE; | |
| 751 else | |
| 752 { | |
| 753 char *acc; | |
| 754 CHECK_STRING (access_); | |
| 755 acc = (char *) XSTRING_DATA (access_); | |
| 756 accessmask = 0; | |
| 757 | |
| 758 if (strchr (acc, '+')) | |
| 759 accessmask |= DB_CREATE; | |
| 760 | |
| 761 if (strchr (acc, 'r') && !strchr (acc, 'w')) | |
| 762 accessmask |= DB_RDONLY; | |
| 763 } | |
| 448 | 764 #if DB_VERSION_MAJOR == 2 |
| 428 | 765 status = db_open (filename, real_subtype, accessmask, |
| 766 modemask, NULL , NULL, &dbase); | |
| 767 if (status) | |
| 768 return Qnil; | |
| 448 | 769 #else |
| 770 status = db_create (&dbase, NULL, 0); | |
| 771 if (status) | |
| 772 return Qnil; | |
| 1141 | 773 #if DB_VERSION_MAJOR < 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR < 1) |
| 448 | 774 status = dbase->open (dbase, filename, NULL, |
| 775 real_subtype, accessmask, modemask); | |
| 1141 | 776 #else /* DB_VERSION >= 4.1 */ |
| 1377 | 777 /* You can't use DB_AUTO_COMMIT unless you have a txn environment. */ |
| 1141 | 778 status = dbase->open (dbase, NULL, filename, NULL, real_subtype, |
| 1377 | 779 accessmask, modemask); |
| 1141 | 780 #endif /* DB_VERSION < 4.1 */ |
| 448 | 781 if (status) |
| 782 { | |
| 783 dbase->close (dbase, 0); | |
| 784 return Qnil; | |
| 785 } | |
| 786 #endif /* DB_VERSION_MAJOR > 2 */ | |
| 787 /* Normalize into system specific file modes. Only for printing */ | |
| 788 accessmask = accessmask & DB_RDONLY ? O_RDONLY : O_RDWR; | |
| 428 | 789 #endif /* DB_VERSION_MAJOR */ |
| 790 | |
| 791 db = allocate_database (); | |
| 792 db->db_handle = dbase; | |
| 793 db->funcs = &berk_func_block; | |
| 771 | 794 db->coding_system = codesys; |
| 428 | 795 goto db_done; |
| 796 } | |
| 797 #endif /* HAVE_BERKELEY_DB */ | |
| 798 | |
| 563 | 799 invalid_constant ("Unsupported database type", type); |
| 428 | 800 return Qnil; |
| 801 | |
| 802 db_done: | |
| 803 db->live_p = 1; | |
| 804 db->fname = file; | |
| 805 db->mode = modemask; | |
| 806 db->access_ = accessmask; | |
| 807 | |
| 793 | 808 return wrap_database (db); |
| 428 | 809 } |
| 810 | |
| 811 DEFUN ("put-database", Fput_database, 3, 4, 0, /* | |
| 812 Store KEY and VALUE in DATABASE. | |
| 813 If optional fourth arg REPLACE is non-nil, | |
| 814 replace any existing entry in the database. | |
| 815 */ | |
| 816 (key, value, database, replace)) | |
| 817 { | |
| 818 CHECK_LIVE_DATABASE (database); | |
| 819 CHECK_STRING (key); | |
| 820 CHECK_STRING (value); | |
| 821 { | |
| 822 Lisp_Database *db = XDATABASE (database); | |
| 823 int status = db->funcs->put (db, key, value, replace); | |
| 824 return status ? Qt : Qnil; | |
| 825 } | |
| 826 } | |
| 827 | |
| 828 DEFUN ("remove-database", Fremove_database, 2, 2, 0, /* | |
| 829 Remove KEY from DATABASE. | |
| 830 */ | |
| 831 (key, database)) | |
| 832 { | |
| 833 CHECK_LIVE_DATABASE (database); | |
| 834 CHECK_STRING (key); | |
| 835 { | |
| 836 Lisp_Database *db = XDATABASE (database); | |
| 837 int status = db->funcs->rem (db, key); | |
| 838 return status ? Qt : Qnil; | |
| 839 } | |
| 840 } | |
| 841 | |
| 842 DEFUN ("get-database", Fget_database, 2, 3, 0, /* | |
| 843 Return value for KEY in DATABASE. | |
| 844 If there is no corresponding value, return DEFAULT (defaults to nil). | |
| 845 */ | |
| 846 (key, database, default_)) | |
| 847 { | |
| 848 CHECK_LIVE_DATABASE (database); | |
| 849 CHECK_STRING (key); | |
| 850 { | |
| 851 Lisp_Database *db = XDATABASE (database); | |
| 852 Lisp_Object retval = db->funcs->get (db, key); | |
| 853 return NILP (retval) ? default_ : retval; | |
| 854 } | |
| 855 } | |
| 856 | |
| 857 DEFUN ("map-database", Fmapdatabase, 2, 2, 0, /* | |
| 858 Map FUNCTION over entries in DATABASE, calling it with two args, | |
| 859 each key and value in the database. | |
| 860 */ | |
| 861 (function, database)) | |
| 862 { | |
| 863 CHECK_LIVE_DATABASE (database); | |
| 864 | |
| 865 XDATABASE (database)->funcs->map (XDATABASE (database), function); | |
| 866 | |
| 867 return Qnil; | |
| 868 } | |
| 869 | |
| 870 void | |
| 871 syms_of_database (void) | |
| 872 { | |
| 442 | 873 INIT_LRECORD_IMPLEMENTATION (database); |
| 874 | |
| 563 | 875 DEFSYMBOL (Qdatabasep); |
| 428 | 876 #ifdef HAVE_DBM |
| 563 | 877 DEFSYMBOL (Qdbm); |
| 428 | 878 #endif |
| 879 #ifdef HAVE_BERKELEY_DB | |
| 563 | 880 DEFSYMBOL (Qberkeley_db); |
| 881 DEFSYMBOL (Qhash); | |
| 882 DEFSYMBOL (Qbtree); | |
| 883 DEFSYMBOL (Qrecno); | |
| 448 | 884 #if DB_VERSION_MAJOR > 2 |
| 563 | 885 DEFSYMBOL (Qqueue); |
| 448 | 886 #endif |
| 563 | 887 DEFSYMBOL (Qunknown); |
| 428 | 888 #endif |
| 889 | |
| 890 DEFSUBR (Fopen_database); | |
| 891 DEFSUBR (Fdatabasep); | |
| 892 DEFSUBR (Fmapdatabase); | |
| 893 DEFSUBR (Fput_database); | |
| 894 DEFSUBR (Fget_database); | |
| 895 DEFSUBR (Fremove_database); | |
| 896 DEFSUBR (Fdatabase_type); | |
| 897 DEFSUBR (Fdatabase_subtype); | |
| 898 DEFSUBR (Fdatabase_last_error); | |
| 899 DEFSUBR (Fdatabase_live_p); | |
| 900 DEFSUBR (Fdatabase_file_name); | |
| 901 DEFSUBR (Fclose_database); | |
| 902 } | |
| 903 | |
| 904 void | |
| 905 vars_of_database (void) | |
| 906 { | |
| 907 #ifdef HAVE_DBM | |
| 908 Fprovide (Qdbm); | |
| 909 #endif | |
| 910 #ifdef HAVE_BERKELEY_DB | |
| 911 Fprovide (Qberkeley_db); | |
| 912 #endif | |
| 913 | |
| 914 DEFVAR_LISP ("database-coding-system", &Vdatabase_coding_system /* | |
| 771 | 915 Default coding system used to convert data in database files. |
| 428 | 916 */ ); |
| 771 | 917 Vdatabase_coding_system = Qnative; |
| 428 | 918 } |