Mercurial > hg > xemacs-beta
annotate src/database.c @ 5464:e79916901603 r21-5-30
XEmacs 21.5.30 "garlic" is released.
| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Wed, 27 Apr 2011 01:24:28 +0900 |
| parents | 88bd4f3ef8e4 |
| children | 308d34e9f07d |
| rev | line source |
|---|---|
| 428 | 1 /* Database access routines |
| 2 Copyright (C) 1996, William M. Perry | |
|
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3 Copyright (C) 2001, 2002, 2005, 2010 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 { | |
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150 NORMAL_LISP_OBJECT_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 { | |
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183 Lisp_Object obj = ALLOC_NORMAL_LISP_OBJECT (database); |
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184 Lisp_Database *db = XDATABASE (obj); |
| 428 | 185 |
| 186 db->fname = Qnil; | |
| 187 db->live_p = 0; | |
| 188 #ifdef HAVE_BERKELEY_DB | |
| 189 db->db_handle = NULL; | |
| 190 #endif | |
| 191 #ifdef HAVE_DBM | |
| 192 db->dbm_handle = NULL; | |
| 193 #endif | |
| 194 db->access_ = 0; | |
| 195 db->mode = 0; | |
| 196 db->dberrno = 0; | |
| 771 | 197 db->coding_system = Qnil; |
| 428 | 198 return db; |
| 199 } | |
| 200 | |
| 1204 | 201 static const struct memory_description database_description[] = { |
| 934 | 202 { XD_LISP_OBJECT, offsetof (struct Lisp_Database, fname) }, |
| 203 { XD_END} | |
| 204 }; | |
| 205 | |
| 428 | 206 static Lisp_Object |
| 444 | 207 mark_database (Lisp_Object object) |
| 428 | 208 { |
| 444 | 209 Lisp_Database *db = XDATABASE (object); |
| 428 | 210 return db->fname; |
| 211 } | |
| 212 | |
| 213 static void | |
| 2286 | 214 print_database (Lisp_Object obj, Lisp_Object printcharfun, |
| 215 int UNUSED (escapeflag)) | |
| 428 | 216 { |
| 217 Lisp_Database *db = XDATABASE (obj); | |
| 218 | |
| 219 if (print_readably) | |
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220 printing_unreadable_lisp_object (obj, 0); |
| 428 | 221 |
| 793 | 222 write_fmt_string_lisp (printcharfun, "#<database \"%s\" (%s/%s/", |
| 223 3, db->fname, db->funcs->get_type (db), | |
| 224 db->funcs->get_subtype (db)); | |
| 225 | |
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226 write_fmt_string (printcharfun, "%s) ", |
| 793 | 227 (!DATABASE_LIVE_P (db) ? "closed" : |
| 228 (db->access_ & O_WRONLY) ? "writeonly" : | |
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229 (db->access_ & O_RDWR) ? "readwrite" : "readonly")); |
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230 |
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231 write_fmt_string_lisp (printcharfun, "coding: %s ", 1, |
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232 XSYMBOL_NAME (XCODING_SYSTEM_NAME |
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233 (db->coding_system))); |
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234 |
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235 write_fmt_string (printcharfun, "0x%x>", LISP_OBJECT_UID (obj)); |
| 428 | 236 } |
| 237 | |
| 238 static void | |
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239 finalize_database (Lisp_Object obj) |
| 428 | 240 { |
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241 Lisp_Database *db = XDATABASE (obj); |
| 428 | 242 |
| 243 db->funcs->close (db); | |
| 244 } | |
| 245 | |
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246 DEFINE_NODUMP_LISP_OBJECT ("database", database, |
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247 mark_database, print_database, |
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248 finalize_database, 0, 0, |
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249 database_description, |
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250 Lisp_Database); |
| 428 | 251 |
| 252 DEFUN ("close-database", Fclose_database, 1, 1, 0, /* | |
| 253 Close database DATABASE. | |
| 254 */ | |
| 255 (database)) | |
| 256 { | |
| 257 Lisp_Database *db; | |
| 258 CHECK_LIVE_DATABASE (database); | |
| 259 db = XDATABASE (database); | |
| 260 db->funcs->close (db); | |
| 261 db->live_p = 0; | |
| 262 return Qnil; | |
| 263 } | |
| 264 | |
| 265 DEFUN ("database-type", Fdatabase_type, 1, 1, 0, /* | |
| 266 Return the type of database DATABASE. | |
| 267 */ | |
| 268 (database)) | |
| 269 { | |
| 270 CHECK_DATABASE (database); | |
| 271 | |
| 272 return XDATABASE (database)->funcs->get_type (XDATABASE (database)); | |
| 273 } | |
| 274 | |
| 275 DEFUN ("database-subtype", Fdatabase_subtype, 1, 1, 0, /* | |
| 276 Return the subtype of database DATABASE, if any. | |
| 277 */ | |
| 278 (database)) | |
| 279 { | |
| 280 CHECK_DATABASE (database); | |
| 281 | |
| 282 return XDATABASE (database)->funcs->get_subtype (XDATABASE (database)); | |
| 283 } | |
| 284 | |
| 285 DEFUN ("database-live-p", Fdatabase_live_p, 1, 1, 0, /* | |
| 444 | 286 Return t if OBJECT is an active database. |
| 428 | 287 */ |
| 444 | 288 (object)) |
| 428 | 289 { |
| 444 | 290 return DATABASEP (object) && DATABASE_LIVE_P (XDATABASE (object)) ? |
| 291 Qt : Qnil; | |
| 428 | 292 } |
| 293 | |
| 294 DEFUN ("database-file-name", Fdatabase_file_name, 1, 1, 0, /* | |
| 295 Return the filename associated with the database DATABASE. | |
| 296 */ | |
| 297 (database)) | |
| 298 { | |
| 299 CHECK_DATABASE (database); | |
| 300 | |
| 301 return XDATABASE (database)->fname; | |
| 302 } | |
| 303 | |
| 304 DEFUN ("databasep", Fdatabasep, 1, 1, 0, /* | |
| 444 | 305 Return t if OBJECT is a database. |
| 428 | 306 */ |
| 444 | 307 (object)) |
| 428 | 308 { |
| 444 | 309 return DATABASEP (object) ? Qt : Qnil; |
| 428 | 310 } |
| 311 | |
| 312 #ifdef HAVE_DBM | |
| 313 static void | |
| 314 dbm_map (Lisp_Database *db, Lisp_Object func) | |
| 315 { | |
| 316 datum keydatum, valdatum; | |
| 317 Lisp_Object key, val; | |
| 318 | |
| 319 for (keydatum = dbm_firstkey (db->dbm_handle); | |
| 320 keydatum.dptr != NULL; | |
| 321 keydatum = dbm_nextkey (db->dbm_handle)) | |
| 322 { | |
| 323 valdatum = dbm_fetch (db->dbm_handle, keydatum); | |
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324 key = make_extstring ((Extbyte *) keydatum.dptr, keydatum.dsize, |
| 771 | 325 db->coding_system); |
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326 val = make_extstring ((Extbyte *) valdatum.dptr, valdatum.dsize, |
| 771 | 327 db->coding_system); |
| 428 | 328 call2 (func, key, val); |
| 329 } | |
| 330 } | |
| 331 | |
| 332 static Lisp_Object | |
| 333 dbm_get (Lisp_Database *db, Lisp_Object key) | |
| 334 { | |
| 335 datum keydatum, valdatum; | |
| 336 | |
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337 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.dptr, keydatum.dsize, |
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338 db->coding_system); |
| 428 | 339 valdatum = dbm_fetch (db->dbm_handle, keydatum); |
| 340 | |
| 341 return (valdatum.dptr | |
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342 ? make_extstring ((Extbyte *) valdatum.dptr, valdatum.dsize, |
| 771 | 343 db->coding_system) |
| 428 | 344 : Qnil); |
| 345 } | |
| 346 | |
| 347 static int | |
| 348 dbm_put (Lisp_Database *db, | |
| 349 Lisp_Object key, Lisp_Object val, Lisp_Object replace) | |
| 350 { | |
| 351 datum keydatum, valdatum; | |
| 352 | |
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353 LISP_STRING_TO_SIZED_EXTERNAL (val, valdatum.dptr, valdatum.dsize, |
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354 db->coding_system); |
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355 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.dptr, keydatum.dsize, |
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356 db->coding_system); |
| 428 | 357 |
| 358 return !dbm_store (db->dbm_handle, keydatum, valdatum, | |
| 359 NILP (replace) ? DBM_INSERT : DBM_REPLACE); | |
| 360 } | |
| 361 | |
| 362 static int | |
| 363 dbm_remove (Lisp_Database *db, Lisp_Object key) | |
| 364 { | |
| 365 datum keydatum; | |
| 366 | |
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367 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.dptr, keydatum.dsize, |
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368 db->coding_system); |
| 428 | 369 |
| 370 return dbm_delete (db->dbm_handle, keydatum); | |
| 371 } | |
| 372 | |
| 373 static Lisp_Object | |
| 2494 | 374 dbm_type (Lisp_Database *UNUSED (db)) |
| 428 | 375 { |
| 376 return Qdbm; | |
| 377 } | |
| 378 | |
| 379 static Lisp_Object | |
| 2494 | 380 dbm_subtype (Lisp_Database *UNUSED (db)) |
| 428 | 381 { |
| 382 return Qnil; | |
| 383 } | |
| 384 | |
| 385 static Lisp_Object | |
| 386 dbm_lasterr (Lisp_Database *db) | |
| 387 { | |
| 388 return lisp_strerror (db->dberrno); | |
| 389 } | |
| 390 | |
| 391 static void | |
| 392 dbm_closeit (Lisp_Database *db) | |
| 393 { | |
| 394 if (db->dbm_handle) | |
| 395 { | |
| 396 dbm_close (db->dbm_handle); | |
| 397 db->dbm_handle = NULL; | |
| 398 } | |
| 399 } | |
| 400 | |
| 401 static DB_FUNCS ndbm_func_block = | |
| 402 { | |
| 403 dbm_subtype, | |
| 404 dbm_type, | |
| 405 dbm_get, | |
| 406 dbm_put, | |
| 407 dbm_remove, | |
| 408 dbm_map, | |
| 409 dbm_closeit, | |
| 410 dbm_lasterr | |
| 411 }; | |
| 412 #endif /* HAVE_DBM */ | |
| 413 | |
| 414 #ifdef HAVE_BERKELEY_DB | |
| 415 static Lisp_Object | |
| 2286 | 416 berkdb_type (Lisp_Database *UNUSED (db)) |
| 428 | 417 { |
| 418 return Qberkeley_db; | |
| 419 } | |
| 420 | |
| 421 static Lisp_Object | |
| 422 berkdb_subtype (Lisp_Database *db) | |
| 423 { | |
| 424 if (!db->db_handle) | |
| 425 return Qnil; | |
| 426 | |
| 427 switch (db->db_handle->type) | |
| 428 { | |
| 429 case DB_BTREE: return Qbtree; | |
| 430 case DB_HASH: return Qhash; | |
| 431 case DB_RECNO: return Qrecno; | |
| 448 | 432 #if DB_VERSION_MAJOR > 2 |
| 433 case DB_QUEUE: return Qqueue; | |
| 434 #endif | |
| 428 | 435 default: return Qunknown; |
| 436 } | |
| 437 } | |
| 438 | |
| 439 static Lisp_Object | |
| 440 berkdb_lasterr (Lisp_Database *db) | |
| 441 { | |
| 442 return lisp_strerror (db->dberrno); | |
| 443 } | |
| 444 | |
| 445 static Lisp_Object | |
| 446 berkdb_get (Lisp_Database *db, Lisp_Object key) | |
| 447 { | |
| 448 DBT keydatum, valdatum; | |
| 449 int status = 0; | |
| 450 | |
| 451 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 452 xzero (keydatum); | |
| 453 xzero (valdatum); | |
| 454 | |
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455 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.data, keydatum.size, |
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456 db->coding_system); |
| 428 | 457 |
| 458 #if DB_VERSION_MAJOR == 1 | |
| 459 status = db->db_handle->get (db->db_handle, &keydatum, &valdatum, 0); | |
| 460 #else | |
| 461 status = db->db_handle->get (db->db_handle, NULL, &keydatum, &valdatum, 0); | |
| 462 #endif /* DB_VERSION_MAJOR */ | |
| 463 | |
| 464 if (!status) | |
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465 return make_extstring ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 466 db->coding_system); |
| 428 | 467 |
| 468 #if DB_VERSION_MAJOR == 1 | |
| 469 db->dberrno = (status == 1) ? -1 : errno; | |
| 470 #else | |
| 471 db->dberrno = (status < 0) ? -1 : errno; | |
| 472 #endif /* DB_VERSION_MAJOR */ | |
| 473 | |
| 474 return Qnil; | |
| 475 } | |
| 476 | |
| 477 static int | |
| 478 berkdb_put (Lisp_Database *db, | |
| 479 Lisp_Object key, | |
| 480 Lisp_Object val, | |
| 481 Lisp_Object replace) | |
| 482 { | |
| 483 DBT keydatum, valdatum; | |
| 484 int status = 0; | |
| 485 | |
| 486 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 487 xzero (keydatum); | |
| 488 xzero (valdatum); | |
| 489 | |
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490 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.data, keydatum.size, |
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491 db->coding_system); |
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492 LISP_STRING_TO_SIZED_EXTERNAL (val, valdatum.data, valdatum.size, |
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493 db->coding_system); |
| 428 | 494 #if DB_VERSION_MAJOR == 1 |
| 495 status = db->db_handle->put (db->db_handle, &keydatum, &valdatum, | |
| 496 NILP (replace) ? R_NOOVERWRITE : 0); | |
| 497 db->dberrno = (status == 1) ? -1 : errno; | |
| 498 #else | |
| 499 status = db->db_handle->put (db->db_handle, NULL, &keydatum, &valdatum, | |
| 500 NILP (replace) ? DB_NOOVERWRITE : 0); | |
| 501 db->dberrno = (status < 0) ? -1 : errno; | |
| 502 #endif/* DV_VERSION_MAJOR = 2 */ | |
| 503 | |
| 504 return status; | |
| 505 } | |
| 506 | |
| 507 static int | |
| 508 berkdb_remove (Lisp_Database *db, Lisp_Object key) | |
| 509 { | |
| 510 DBT keydatum; | |
| 511 int status; | |
| 512 | |
| 513 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 514 xzero (keydatum); | |
| 515 | |
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516 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.data, keydatum.size, |
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517 db->coding_system); |
| 428 | 518 |
| 519 #if DB_VERSION_MAJOR == 1 | |
| 520 status = db->db_handle->del (db->db_handle, &keydatum, 0); | |
| 521 #else | |
| 522 status = db->db_handle->del (db->db_handle, NULL, &keydatum, 0); | |
| 523 #endif /* DB_VERSION_MAJOR */ | |
| 524 | |
| 525 if (!status) | |
| 526 return 0; | |
| 527 | |
| 528 #if DB_VERSION_MAJOR == 1 | |
| 529 db->dberrno = (status == 1) ? -1 : errno; | |
| 530 #else | |
| 531 db->dberrno = (status < 0) ? -1 : errno; | |
| 532 #endif /* DB_VERSION_MAJOR */ | |
| 533 | |
| 534 return 1; | |
| 535 } | |
| 536 | |
| 537 static void | |
| 538 berkdb_map (Lisp_Database *db, Lisp_Object func) | |
| 539 { | |
| 540 DBT keydatum, valdatum; | |
| 541 Lisp_Object key, val; | |
| 542 DB *dbp = db->db_handle; | |
| 543 int status; | |
| 544 | |
| 545 xzero (keydatum); | |
| 546 xzero (valdatum); | |
| 547 | |
| 548 #if DB_VERSION_MAJOR == 1 | |
| 549 for (status = dbp->seq (dbp, &keydatum, &valdatum, R_FIRST); | |
| 550 status == 0; | |
| 551 status = dbp->seq (dbp, &keydatum, &valdatum, R_NEXT)) | |
| 552 { | |
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553 key = make_extstring ((const Extbyte *) keydatum.data, keydatum.size, |
| 771 | 554 db->coding_system); |
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555 val = make_extstring ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 556 db->coding_system); |
| 428 | 557 call2 (func, key, val); |
| 558 } | |
| 559 #else | |
| 560 { | |
| 561 DBC *dbcp; | |
| 562 | |
| 563 #if DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >=6 | |
| 564 status = dbp->cursor (dbp, NULL, &dbcp, 0); | |
| 565 #else | |
| 566 status = dbp->cursor (dbp, NULL, &dbcp); | |
| 440 | 567 #endif |
| 428 | 568 for (status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_FIRST); |
| 569 status == 0; | |
| 570 status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_NEXT)) | |
| 571 { | |
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572 key = make_extstring ((const Extbyte *) keydatum.data, keydatum.size, |
| 771 | 573 db->coding_system); |
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574 val = make_extstring ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 575 db->coding_system); |
| 428 | 576 call2 (func, key, val); |
| 577 } | |
| 578 dbcp->c_close (dbcp); | |
| 579 } | |
| 580 #endif /* DB_VERSION_MAJOR */ | |
| 581 } | |
| 582 | |
| 583 static void | |
| 584 berkdb_close (Lisp_Database *db) | |
| 585 { | |
| 586 if (db->db_handle) | |
| 587 { | |
| 588 #if DB_VERSION_MAJOR == 1 | |
| 589 db->db_handle->sync (db->db_handle, 0); | |
| 590 db->db_handle->close (db->db_handle); | |
| 591 #else | |
| 592 db->db_handle->sync (db->db_handle, 0); | |
| 593 db->db_handle->close (db->db_handle, 0); | |
| 594 #endif /* DB_VERSION_MAJOR */ | |
| 595 db->db_handle = NULL; | |
| 596 } | |
| 597 } | |
| 598 | |
| 599 static DB_FUNCS berk_func_block = | |
| 600 { | |
| 601 berkdb_subtype, | |
| 602 berkdb_type, | |
| 603 berkdb_get, | |
| 604 berkdb_put, | |
| 605 berkdb_remove, | |
| 606 berkdb_map, | |
| 607 berkdb_close, | |
| 608 berkdb_lasterr | |
| 609 }; | |
| 610 #endif /* HAVE_BERKELEY_DB */ | |
| 611 | |
| 612 DEFUN ("database-last-error", Fdatabase_last_error, 0, 1, 0, /* | |
| 613 Return the last error associated with DATABASE. | |
| 614 */ | |
| 615 (database)) | |
| 616 { | |
| 617 if (NILP (database)) | |
| 618 return lisp_strerror (errno); | |
| 619 | |
| 620 CHECK_DATABASE (database); | |
| 621 | |
| 622 return XDATABASE (database)->funcs->last_error (XDATABASE (database)); | |
| 623 } | |
| 624 | |
| 771 | 625 DEFUN ("open-database", Fopen_database, 1, 6, 0, /* |
| 428 | 626 Return a new database object opened on FILE. |
| 627 Optional arguments TYPE and SUBTYPE specify the database type. | |
| 628 Optional argument ACCESS specifies the access rights, which may be any | |
| 629 combination of 'r' 'w' and '+', for read, write, and creation flags. | |
| 630 Optional argument MODE gives the permissions to use when opening FILE, | |
| 631 and defaults to 0755. | |
| 771 | 632 Optional argument CODESYS specifies the coding system used to encode/decode |
| 633 data passed to/from the database, and defaults to the value of the | |
| 634 variable `database-coding-system'. | |
| 428 | 635 */ |
| 771 | 636 (file, type, subtype, access_, mode, codesys)) |
| 428 | 637 { |
| 638 /* This function can GC */ | |
| 639 int modemask; | |
| 640 int accessmask = 0; | |
| 641 Lisp_Database *db = NULL; | |
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642 Extbyte *filename; |
| 428 | 643 struct gcpro gcpro1, gcpro2; |
| 644 | |
| 645 CHECK_STRING (file); | |
| 646 GCPRO2 (file, access_); | |
| 647 file = Fexpand_file_name (file, Qnil); | |
| 648 UNGCPRO; | |
| 649 | |
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650 LISP_PATHNAME_CONVERT_OUT (file, filename); |
| 428 | 651 |
| 652 if (NILP (access_)) | |
| 653 { | |
| 654 accessmask = O_RDWR | O_CREAT; | |
| 655 } | |
| 656 else | |
| 657 { | |
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658 Ibyte *acc; |
| 428 | 659 CHECK_STRING (access_); |
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660 acc = XSTRING_DATA (access_); |
| 428 | 661 |
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662 if (qxestrchr (acc, '+')) |
| 428 | 663 accessmask |= O_CREAT; |
| 664 | |
| 665 { | |
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666 int rp = !!qxestrchr (acc, 'r'); |
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667 int wp = !!qxestrchr (acc, 'w'); |
| 428 | 668 if (rp && wp) accessmask |= O_RDWR; |
| 669 else if (wp) accessmask |= O_WRONLY; | |
| 670 else accessmask |= O_RDONLY; | |
| 671 } | |
| 672 } | |
| 673 | |
| 674 if (NILP (mode)) | |
| 675 { | |
| 676 modemask = 0755; /* rwxr-xr-x */ | |
| 677 } | |
| 678 else | |
| 679 { | |
| 680 CHECK_INT (mode); | |
| 681 modemask = XINT (mode); | |
| 682 } | |
| 683 | |
| 771 | 684 if (NILP (codesys)) |
| 685 codesys = Vdatabase_coding_system; | |
| 686 | |
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687 codesys = get_coding_system_for_text_file (codesys, 0); |
| 771 | 688 |
| 428 | 689 #ifdef HAVE_DBM |
| 690 if (NILP (type) || EQ (type, Qdbm)) | |
| 691 { | |
| 692 DBM *dbase = dbm_open (filename, accessmask, modemask); | |
| 693 if (!dbase) | |
| 694 return Qnil; | |
| 695 | |
| 696 db = allocate_database (); | |
| 697 db->dbm_handle = dbase; | |
| 698 db->funcs = &ndbm_func_block; | |
| 771 | 699 db->coding_system = codesys; |
| 428 | 700 goto db_done; |
| 701 } | |
| 702 #endif /* HAVE_DBM */ | |
| 703 | |
| 704 #ifdef HAVE_BERKELEY_DB | |
| 705 if (NILP (type) || EQ (type, Qberkeley_db)) | |
| 706 { | |
| 707 DBTYPE real_subtype; | |
| 708 DB *dbase; | |
| 709 #if DB_VERSION_MAJOR != 1 | |
| 710 int status; | |
| 711 #endif | |
| 712 | |
| 713 if (EQ (subtype, Qhash) || NILP (subtype)) | |
| 714 real_subtype = DB_HASH; | |
| 715 else if (EQ (subtype, Qbtree)) | |
| 716 real_subtype = DB_BTREE; | |
| 717 else if (EQ (subtype, Qrecno)) | |
| 718 real_subtype = DB_RECNO; | |
| 448 | 719 #if DB_VERSION_MAJOR > 2 |
| 720 else if (EQ (subtype, Qqueue)) | |
| 721 real_subtype = DB_QUEUE; | |
| 722 #endif | |
| 428 | 723 else |
| 563 | 724 invalid_constant ("Unsupported subtype", subtype); |
| 428 | 725 |
| 726 #if DB_VERSION_MAJOR == 1 | |
| 727 dbase = dbopen (filename, accessmask, modemask, real_subtype, NULL); | |
| 728 if (!dbase) | |
| 729 return Qnil; | |
| 730 #else | |
| 731 /* Berkeley DB Version 2 has only the accessmask DB_CREATE and DB_RDONLY, | |
| 732 other flags shouldn't be set */ | |
| 733 if (NILP (access_)) | |
| 734 accessmask = DB_CREATE; | |
| 735 else | |
| 736 { | |
| 737 char *acc; | |
| 738 CHECK_STRING (access_); | |
| 739 acc = (char *) XSTRING_DATA (access_); | |
| 740 accessmask = 0; | |
| 741 | |
| 742 if (strchr (acc, '+')) | |
| 743 accessmask |= DB_CREATE; | |
| 744 | |
| 745 if (strchr (acc, 'r') && !strchr (acc, 'w')) | |
| 746 accessmask |= DB_RDONLY; | |
| 747 } | |
| 448 | 748 #if DB_VERSION_MAJOR == 2 |
| 428 | 749 status = db_open (filename, real_subtype, accessmask, |
| 750 modemask, NULL , NULL, &dbase); | |
| 751 if (status) | |
| 752 return Qnil; | |
| 448 | 753 #else |
| 754 status = db_create (&dbase, NULL, 0); | |
| 755 if (status) | |
| 756 return Qnil; | |
| 1141 | 757 #if DB_VERSION_MAJOR < 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR < 1) |
| 448 | 758 status = dbase->open (dbase, filename, NULL, |
| 759 real_subtype, accessmask, modemask); | |
| 1141 | 760 #else /* DB_VERSION >= 4.1 */ |
| 1377 | 761 /* You can't use DB_AUTO_COMMIT unless you have a txn environment. */ |
| 1141 | 762 status = dbase->open (dbase, NULL, filename, NULL, real_subtype, |
| 1377 | 763 accessmask, modemask); |
| 1141 | 764 #endif /* DB_VERSION < 4.1 */ |
| 448 | 765 if (status) |
| 766 { | |
| 767 dbase->close (dbase, 0); | |
| 768 return Qnil; | |
| 769 } | |
| 770 #endif /* DB_VERSION_MAJOR > 2 */ | |
| 771 /* Normalize into system specific file modes. Only for printing */ | |
| 772 accessmask = accessmask & DB_RDONLY ? O_RDONLY : O_RDWR; | |
| 428 | 773 #endif /* DB_VERSION_MAJOR */ |
| 774 | |
| 775 db = allocate_database (); | |
| 776 db->db_handle = dbase; | |
| 777 db->funcs = &berk_func_block; | |
| 771 | 778 db->coding_system = codesys; |
| 428 | 779 goto db_done; |
| 780 } | |
| 781 #endif /* HAVE_BERKELEY_DB */ | |
| 782 | |
| 563 | 783 invalid_constant ("Unsupported database type", type); |
| 428 | 784 return Qnil; |
| 785 | |
| 786 db_done: | |
| 787 db->live_p = 1; | |
| 788 db->fname = file; | |
| 789 db->mode = modemask; | |
| 790 db->access_ = accessmask; | |
| 791 | |
| 793 | 792 return wrap_database (db); |
| 428 | 793 } |
| 794 | |
| 795 DEFUN ("put-database", Fput_database, 3, 4, 0, /* | |
| 796 Store KEY and VALUE in DATABASE. | |
| 797 If optional fourth arg REPLACE is non-nil, | |
| 798 replace any existing entry in the database. | |
| 799 */ | |
| 800 (key, value, database, replace)) | |
| 801 { | |
| 802 CHECK_LIVE_DATABASE (database); | |
| 803 CHECK_STRING (key); | |
| 804 CHECK_STRING (value); | |
| 805 { | |
| 806 Lisp_Database *db = XDATABASE (database); | |
| 807 int status = db->funcs->put (db, key, value, replace); | |
| 808 return status ? Qt : Qnil; | |
| 809 } | |
| 810 } | |
| 811 | |
| 812 DEFUN ("remove-database", Fremove_database, 2, 2, 0, /* | |
| 813 Remove KEY from DATABASE. | |
| 814 */ | |
| 815 (key, database)) | |
| 816 { | |
| 817 CHECK_LIVE_DATABASE (database); | |
| 818 CHECK_STRING (key); | |
| 819 { | |
| 820 Lisp_Database *db = XDATABASE (database); | |
| 821 int status = db->funcs->rem (db, key); | |
| 822 return status ? Qt : Qnil; | |
| 823 } | |
| 824 } | |
| 825 | |
| 826 DEFUN ("get-database", Fget_database, 2, 3, 0, /* | |
| 827 Return value for KEY in DATABASE. | |
| 828 If there is no corresponding value, return DEFAULT (defaults to nil). | |
| 829 */ | |
| 830 (key, database, default_)) | |
| 831 { | |
| 832 CHECK_LIVE_DATABASE (database); | |
| 833 CHECK_STRING (key); | |
| 834 { | |
| 835 Lisp_Database *db = XDATABASE (database); | |
| 836 Lisp_Object retval = db->funcs->get (db, key); | |
| 837 return NILP (retval) ? default_ : retval; | |
| 838 } | |
| 839 } | |
| 840 | |
| 841 DEFUN ("map-database", Fmapdatabase, 2, 2, 0, /* | |
| 842 Map FUNCTION over entries in DATABASE, calling it with two args, | |
| 843 each key and value in the database. | |
| 844 */ | |
| 845 (function, database)) | |
| 846 { | |
| 847 CHECK_LIVE_DATABASE (database); | |
| 848 | |
| 849 XDATABASE (database)->funcs->map (XDATABASE (database), function); | |
| 850 | |
| 851 return Qnil; | |
| 852 } | |
| 853 | |
| 854 void | |
| 855 syms_of_database (void) | |
| 856 { | |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3072
diff
changeset
|
857 INIT_LISP_OBJECT (database); |
| 442 | 858 |
| 563 | 859 DEFSYMBOL (Qdatabasep); |
| 428 | 860 #ifdef HAVE_DBM |
| 563 | 861 DEFSYMBOL (Qdbm); |
| 428 | 862 #endif |
| 863 #ifdef HAVE_BERKELEY_DB | |
| 563 | 864 DEFSYMBOL (Qberkeley_db); |
| 865 DEFSYMBOL (Qhash); | |
| 866 DEFSYMBOL (Qbtree); | |
| 867 DEFSYMBOL (Qrecno); | |
| 448 | 868 #if DB_VERSION_MAJOR > 2 |
| 563 | 869 DEFSYMBOL (Qqueue); |
| 448 | 870 #endif |
| 563 | 871 DEFSYMBOL (Qunknown); |
| 428 | 872 #endif |
| 873 | |
| 874 DEFSUBR (Fopen_database); | |
| 875 DEFSUBR (Fdatabasep); | |
| 876 DEFSUBR (Fmapdatabase); | |
| 877 DEFSUBR (Fput_database); | |
| 878 DEFSUBR (Fget_database); | |
| 879 DEFSUBR (Fremove_database); | |
| 880 DEFSUBR (Fdatabase_type); | |
| 881 DEFSUBR (Fdatabase_subtype); | |
| 882 DEFSUBR (Fdatabase_last_error); | |
| 883 DEFSUBR (Fdatabase_live_p); | |
| 884 DEFSUBR (Fdatabase_file_name); | |
| 885 DEFSUBR (Fclose_database); | |
| 886 } | |
| 887 | |
| 888 void | |
| 889 vars_of_database (void) | |
| 890 { | |
| 891 #ifdef HAVE_DBM | |
| 892 Fprovide (Qdbm); | |
| 893 #endif | |
| 894 #ifdef HAVE_BERKELEY_DB | |
| 895 Fprovide (Qberkeley_db); | |
| 896 #endif | |
| 897 | |
| 898 DEFVAR_LISP ("database-coding-system", &Vdatabase_coding_system /* | |
| 771 | 899 Default coding system used to convert data in database files. |
| 428 | 900 */ ); |
| 771 | 901 Vdatabase_coding_system = Qnative; |
| 428 | 902 } |