Mercurial > hg > xemacs-beta
annotate src/database.c @ 5537:2df2d9171f20
Suppress a "shadowed local" warning.
| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Mon, 08 Aug 2011 13:57:18 +0900 |
| parents | 308d34e9f07d |
| children | 56144c8593a8 |
| 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 | |
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7 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation, either version 3 of the License, or (at your |
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10 option) any later version. |
| 428 | 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 | |
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18 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 19 |
| 20 /* Synched up with: Not in FSF. */ | |
| 21 | |
| 22 /* Written by Bill Perry */ | |
| 23 /* Substantially rewritten by Martin Buchholz */ | |
| 24 /* db 2.x support added by Andreas Jaeger */ | |
| 771 | 25 /* Mule-ized 6-22-00 Ben Wing */ |
| 428 | 26 |
| 27 #include <config.h> | |
| 28 #include "lisp.h" | |
| 771 | 29 |
| 428 | 30 #include "sysfile.h" |
| 31 #include "buffer.h" | |
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32 #include "file-coding.h" |
| 428 | 33 |
| 34 #ifndef HAVE_DATABASE | |
| 35 #error HAVE_DATABASE not defined!! | |
| 36 #endif | |
| 37 | |
| 38 #include "database.h" /* Our include file */ | |
| 39 | |
| 40 #ifdef HAVE_BERKELEY_DB | |
| 41 /* Work around Berkeley DB's use of int types which are defined | |
| 42 slightly differently in the not quite yet standard <inttypes.h>. | |
| 43 See db.h for details of why we're resorting to this... */ | |
| 44 /* glibc 2.1 doesn't have this problem with DB 2.x */ | |
| 45 #if !(defined __GLIBC__ && __GLIBC_MINOR__ >= 1) | |
| 46 #ifdef HAVE_INTTYPES_H | |
| 3739 | 47 #ifndef __BIT_TYPES_DEFINED__ |
| 428 | 48 #define __BIT_TYPES_DEFINED__ |
| 3739 | 49 #endif |
| 428 | 50 #include <inttypes.h> |
| 3739 | 51 #if !HAVE_U_INT8_T |
| 428 | 52 typedef uint8_t u_int8_t; |
| 3739 | 53 #endif |
| 54 #if !HAVE_U_INT16_T | |
| 428 | 55 typedef uint16_t u_int16_t; |
| 3739 | 56 #endif |
| 57 #if !HAVE_U_INT32_T | |
| 428 | 58 typedef uint32_t u_int32_t; |
| 3739 | 59 #endif |
| 428 | 60 #ifdef WE_DONT_NEED_QUADS |
| 3739 | 61 #if !HAVE_U_INT64_T |
| 428 | 62 typedef uint64_t u_int64_t; |
| 3739 | 63 #endif |
| 428 | 64 #endif /* WE_DONT_NEED_QUADS */ |
| 65 #endif /* HAVE_INTTYPES_H */ | |
| 66 #endif /* !(defined __GLIBC__ && __GLIBC_MINOR__ >= 1) */ | |
| 1460 | 67 /* Berkeley DB wants __STDC__ to be defined; else if does `#define const' */ |
| 68 #if ! defined (__STDC__) && ! defined(__cplusplus) | |
| 69 #define __STDC__ 0 | |
| 70 #endif | |
| 442 | 71 #include DB_H_FILE /* Berkeley db's header file */ |
| 428 | 72 #ifndef DB_VERSION_MAJOR |
| 73 # define DB_VERSION_MAJOR 1 | |
| 74 #endif /* DB_VERSION_MAJOR */ | |
| 1141 | 75 #ifndef DB_VERSION_MINOR |
| 76 # define DB_VERSION_MINOR 0 | |
| 77 #endif /* DB_VERSION_MINOR */ | |
| 428 | 78 Lisp_Object Qberkeley_db; |
| 79 Lisp_Object Qhash, Qbtree, Qrecno, Qunknown; | |
| 448 | 80 #if DB_VERSION_MAJOR > 2 |
| 81 Lisp_Object Qqueue; | |
| 82 #endif | |
| 428 | 83 #endif /* HAVE_BERKELEY_DB */ |
| 84 | |
| 85 #ifdef HAVE_DBM | |
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86 # ifdef TRUST_NDBM_H_PROTOTYPES |
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87 # include NDBM_H_FILE |
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88 # else /* not TRUST_NDBM_H_PROTOTYPES */ |
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89 |
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90 /* The prototypes in gdbm/ndbm.h currently are broken when compiling |
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91 using C++, since they are of the form `datum dbm_firstkey()', without any |
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92 args given. */ |
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93 |
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94 #if defined(__cplusplus) || defined(c_plusplus) |
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95 extern "C" { |
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96 #endif |
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97 |
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98 /* Parameters to dbm_store for simple insertion or replacement. */ |
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99 #define DBM_INSERT 0 |
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100 #define DBM_REPLACE 1 |
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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 { |
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105 char *dptr; |
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106 int dsize; |
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107 } datum; |
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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 # endif /* (not) TRUST_NDBM_H_PROTOTYPES */ |
| 428 | 127 Lisp_Object Qdbm; |
| 128 #endif /* HAVE_DBM */ | |
| 129 | |
| 130 Lisp_Object Vdatabase_coding_system; | |
| 131 | |
| 132 Lisp_Object Qdatabasep; | |
| 133 | |
| 134 typedef struct | |
| 135 { | |
| 136 Lisp_Object (*get_subtype) (Lisp_Database *); | |
| 137 Lisp_Object (*get_type) (Lisp_Database *); | |
| 138 Lisp_Object (*get) (Lisp_Database *, Lisp_Object); | |
| 139 int (*put) (Lisp_Database *, Lisp_Object, Lisp_Object, Lisp_Object); | |
| 140 int (*rem) (Lisp_Database *, Lisp_Object); | |
| 141 void (*map) (Lisp_Database *, Lisp_Object); | |
| 142 void (*close) (Lisp_Database *); | |
| 143 Lisp_Object (*last_error) (Lisp_Database *); | |
| 144 } DB_FUNCS; | |
| 145 | |
| 146 struct Lisp_Database | |
| 147 { | |
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148 NORMAL_LISP_OBJECT_HEADER header; |
| 428 | 149 Lisp_Object fname; |
| 150 int mode; | |
| 151 int access_; | |
| 152 int dberrno; | |
| 153 int live_p; | |
| 154 #ifdef HAVE_DBM | |
| 155 DBM *dbm_handle; | |
| 156 #endif | |
| 157 #ifdef HAVE_BERKELEY_DB | |
| 158 DB *db_handle; | |
| 159 #endif | |
| 160 DB_FUNCS *funcs; | |
| 161 Lisp_Object coding_system; | |
| 162 }; | |
| 163 | |
| 164 #define XDATABASE(x) XRECORD (x, database, Lisp_Database) | |
| 617 | 165 #define wrap_database(p) wrap_record (p, database) |
| 428 | 166 #define DATABASEP(x) RECORDP (x, database) |
| 167 #define CHECK_DATABASE(x) CHECK_RECORD (x, database) | |
| 168 #define CONCHECK_DATABASE(x) CONCHECK_RECORD (x, database) | |
| 169 #define DATABASE_LIVE_P(x) (x->live_p) | |
| 170 | |
| 171 #define CHECK_LIVE_DATABASE(db) do { \ | |
| 172 CHECK_DATABASE (db); \ | |
| 173 if (!DATABASE_LIVE_P (XDATABASE(db))) \ | |
| 563 | 174 invalid_operation ("Attempting to access closed database", db); \ |
| 428 | 175 } while (0) |
| 176 | |
| 177 | |
| 178 static Lisp_Database * | |
| 179 allocate_database (void) | |
| 180 { | |
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181 Lisp_Object obj = ALLOC_NORMAL_LISP_OBJECT (database); |
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182 Lisp_Database *db = XDATABASE (obj); |
| 428 | 183 |
| 184 db->fname = Qnil; | |
| 185 db->live_p = 0; | |
| 186 #ifdef HAVE_BERKELEY_DB | |
| 187 db->db_handle = NULL; | |
| 188 #endif | |
| 189 #ifdef HAVE_DBM | |
| 190 db->dbm_handle = NULL; | |
| 191 #endif | |
| 192 db->access_ = 0; | |
| 193 db->mode = 0; | |
| 194 db->dberrno = 0; | |
| 771 | 195 db->coding_system = Qnil; |
| 428 | 196 return db; |
| 197 } | |
| 198 | |
| 1204 | 199 static const struct memory_description database_description[] = { |
| 934 | 200 { XD_LISP_OBJECT, offsetof (struct Lisp_Database, fname) }, |
| 201 { XD_END} | |
| 202 }; | |
| 203 | |
| 428 | 204 static Lisp_Object |
| 444 | 205 mark_database (Lisp_Object object) |
| 428 | 206 { |
| 444 | 207 Lisp_Database *db = XDATABASE (object); |
| 428 | 208 return db->fname; |
| 209 } | |
| 210 | |
| 211 static void | |
| 2286 | 212 print_database (Lisp_Object obj, Lisp_Object printcharfun, |
| 213 int UNUSED (escapeflag)) | |
| 428 | 214 { |
| 215 Lisp_Database *db = XDATABASE (obj); | |
| 216 | |
| 217 if (print_readably) | |
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218 printing_unreadable_lisp_object (obj, 0); |
| 428 | 219 |
| 793 | 220 write_fmt_string_lisp (printcharfun, "#<database \"%s\" (%s/%s/", |
| 221 3, db->fname, db->funcs->get_type (db), | |
| 222 db->funcs->get_subtype (db)); | |
| 223 | |
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224 write_fmt_string (printcharfun, "%s) ", |
| 793 | 225 (!DATABASE_LIVE_P (db) ? "closed" : |
| 226 (db->access_ & O_WRONLY) ? "writeonly" : | |
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227 (db->access_ & O_RDWR) ? "readwrite" : "readonly")); |
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228 |
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229 write_fmt_string_lisp (printcharfun, "coding: %s ", 1, |
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230 XSYMBOL_NAME (XCODING_SYSTEM_NAME |
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231 (db->coding_system))); |
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232 |
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233 write_fmt_string (printcharfun, "0x%x>", LISP_OBJECT_UID (obj)); |
| 428 | 234 } |
| 235 | |
| 236 static void | |
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237 finalize_database (Lisp_Object obj) |
| 428 | 238 { |
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239 Lisp_Database *db = XDATABASE (obj); |
| 428 | 240 |
| 241 db->funcs->close (db); | |
| 242 } | |
| 243 | |
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244 DEFINE_NODUMP_LISP_OBJECT ("database", database, |
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245 mark_database, print_database, |
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246 finalize_database, 0, 0, |
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247 database_description, |
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248 Lisp_Database); |
| 428 | 249 |
| 250 DEFUN ("close-database", Fclose_database, 1, 1, 0, /* | |
| 251 Close database DATABASE. | |
| 252 */ | |
| 253 (database)) | |
| 254 { | |
| 255 Lisp_Database *db; | |
| 256 CHECK_LIVE_DATABASE (database); | |
| 257 db = XDATABASE (database); | |
| 258 db->funcs->close (db); | |
| 259 db->live_p = 0; | |
| 260 return Qnil; | |
| 261 } | |
| 262 | |
| 263 DEFUN ("database-type", Fdatabase_type, 1, 1, 0, /* | |
| 264 Return the type of database DATABASE. | |
| 265 */ | |
| 266 (database)) | |
| 267 { | |
| 268 CHECK_DATABASE (database); | |
| 269 | |
| 270 return XDATABASE (database)->funcs->get_type (XDATABASE (database)); | |
| 271 } | |
| 272 | |
| 273 DEFUN ("database-subtype", Fdatabase_subtype, 1, 1, 0, /* | |
| 274 Return the subtype of database DATABASE, if any. | |
| 275 */ | |
| 276 (database)) | |
| 277 { | |
| 278 CHECK_DATABASE (database); | |
| 279 | |
| 280 return XDATABASE (database)->funcs->get_subtype (XDATABASE (database)); | |
| 281 } | |
| 282 | |
| 283 DEFUN ("database-live-p", Fdatabase_live_p, 1, 1, 0, /* | |
| 444 | 284 Return t if OBJECT is an active database. |
| 428 | 285 */ |
| 444 | 286 (object)) |
| 428 | 287 { |
| 444 | 288 return DATABASEP (object) && DATABASE_LIVE_P (XDATABASE (object)) ? |
| 289 Qt : Qnil; | |
| 428 | 290 } |
| 291 | |
| 292 DEFUN ("database-file-name", Fdatabase_file_name, 1, 1, 0, /* | |
| 293 Return the filename associated with the database DATABASE. | |
| 294 */ | |
| 295 (database)) | |
| 296 { | |
| 297 CHECK_DATABASE (database); | |
| 298 | |
| 299 return XDATABASE (database)->fname; | |
| 300 } | |
| 301 | |
| 302 DEFUN ("databasep", Fdatabasep, 1, 1, 0, /* | |
| 444 | 303 Return t if OBJECT is a database. |
| 428 | 304 */ |
| 444 | 305 (object)) |
| 428 | 306 { |
| 444 | 307 return DATABASEP (object) ? Qt : Qnil; |
| 428 | 308 } |
| 309 | |
| 310 #ifdef HAVE_DBM | |
| 311 static void | |
| 312 dbm_map (Lisp_Database *db, Lisp_Object func) | |
| 313 { | |
| 314 datum keydatum, valdatum; | |
| 315 Lisp_Object key, val; | |
| 316 | |
| 317 for (keydatum = dbm_firstkey (db->dbm_handle); | |
| 318 keydatum.dptr != NULL; | |
| 319 keydatum = dbm_nextkey (db->dbm_handle)) | |
| 320 { | |
| 321 valdatum = dbm_fetch (db->dbm_handle, keydatum); | |
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322 key = make_extstring ((Extbyte *) keydatum.dptr, keydatum.dsize, |
| 771 | 323 db->coding_system); |
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324 val = make_extstring ((Extbyte *) valdatum.dptr, valdatum.dsize, |
| 771 | 325 db->coding_system); |
| 428 | 326 call2 (func, key, val); |
| 327 } | |
| 328 } | |
| 329 | |
| 330 static Lisp_Object | |
| 331 dbm_get (Lisp_Database *db, Lisp_Object key) | |
| 332 { | |
| 333 datum keydatum, valdatum; | |
| 334 | |
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335 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.dptr, keydatum.dsize, |
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336 db->coding_system); |
| 428 | 337 valdatum = dbm_fetch (db->dbm_handle, keydatum); |
| 338 | |
| 339 return (valdatum.dptr | |
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340 ? make_extstring ((Extbyte *) valdatum.dptr, valdatum.dsize, |
| 771 | 341 db->coding_system) |
| 428 | 342 : Qnil); |
| 343 } | |
| 344 | |
| 345 static int | |
| 346 dbm_put (Lisp_Database *db, | |
| 347 Lisp_Object key, Lisp_Object val, Lisp_Object replace) | |
| 348 { | |
| 349 datum keydatum, valdatum; | |
| 350 | |
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351 LISP_STRING_TO_SIZED_EXTERNAL (val, valdatum.dptr, valdatum.dsize, |
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352 db->coding_system); |
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353 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.dptr, keydatum.dsize, |
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354 db->coding_system); |
| 428 | 355 |
| 356 return !dbm_store (db->dbm_handle, keydatum, valdatum, | |
| 357 NILP (replace) ? DBM_INSERT : DBM_REPLACE); | |
| 358 } | |
| 359 | |
| 360 static int | |
| 361 dbm_remove (Lisp_Database *db, Lisp_Object key) | |
| 362 { | |
| 363 datum keydatum; | |
| 364 | |
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365 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.dptr, keydatum.dsize, |
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366 db->coding_system); |
| 428 | 367 |
| 368 return dbm_delete (db->dbm_handle, keydatum); | |
| 369 } | |
| 370 | |
| 371 static Lisp_Object | |
| 2494 | 372 dbm_type (Lisp_Database *UNUSED (db)) |
| 428 | 373 { |
| 374 return Qdbm; | |
| 375 } | |
| 376 | |
| 377 static Lisp_Object | |
| 2494 | 378 dbm_subtype (Lisp_Database *UNUSED (db)) |
| 428 | 379 { |
| 380 return Qnil; | |
| 381 } | |
| 382 | |
| 383 static Lisp_Object | |
| 384 dbm_lasterr (Lisp_Database *db) | |
| 385 { | |
| 386 return lisp_strerror (db->dberrno); | |
| 387 } | |
| 388 | |
| 389 static void | |
| 390 dbm_closeit (Lisp_Database *db) | |
| 391 { | |
| 392 if (db->dbm_handle) | |
| 393 { | |
| 394 dbm_close (db->dbm_handle); | |
| 395 db->dbm_handle = NULL; | |
| 396 } | |
| 397 } | |
| 398 | |
| 399 static DB_FUNCS ndbm_func_block = | |
| 400 { | |
| 401 dbm_subtype, | |
| 402 dbm_type, | |
| 403 dbm_get, | |
| 404 dbm_put, | |
| 405 dbm_remove, | |
| 406 dbm_map, | |
| 407 dbm_closeit, | |
| 408 dbm_lasterr | |
| 409 }; | |
| 410 #endif /* HAVE_DBM */ | |
| 411 | |
| 412 #ifdef HAVE_BERKELEY_DB | |
| 413 static Lisp_Object | |
| 2286 | 414 berkdb_type (Lisp_Database *UNUSED (db)) |
| 428 | 415 { |
| 416 return Qberkeley_db; | |
| 417 } | |
| 418 | |
| 419 static Lisp_Object | |
| 420 berkdb_subtype (Lisp_Database *db) | |
| 421 { | |
| 422 if (!db->db_handle) | |
| 423 return Qnil; | |
| 424 | |
| 425 switch (db->db_handle->type) | |
| 426 { | |
| 427 case DB_BTREE: return Qbtree; | |
| 428 case DB_HASH: return Qhash; | |
| 429 case DB_RECNO: return Qrecno; | |
| 448 | 430 #if DB_VERSION_MAJOR > 2 |
| 431 case DB_QUEUE: return Qqueue; | |
| 432 #endif | |
| 428 | 433 default: return Qunknown; |
| 434 } | |
| 435 } | |
| 436 | |
| 437 static Lisp_Object | |
| 438 berkdb_lasterr (Lisp_Database *db) | |
| 439 { | |
| 440 return lisp_strerror (db->dberrno); | |
| 441 } | |
| 442 | |
| 443 static Lisp_Object | |
| 444 berkdb_get (Lisp_Database *db, Lisp_Object key) | |
| 445 { | |
| 446 DBT keydatum, valdatum; | |
| 447 int status = 0; | |
| 448 | |
| 449 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 450 xzero (keydatum); | |
| 451 xzero (valdatum); | |
| 452 | |
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453 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.data, keydatum.size, |
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454 db->coding_system); |
| 428 | 455 |
| 456 #if DB_VERSION_MAJOR == 1 | |
| 457 status = db->db_handle->get (db->db_handle, &keydatum, &valdatum, 0); | |
| 458 #else | |
| 459 status = db->db_handle->get (db->db_handle, NULL, &keydatum, &valdatum, 0); | |
| 460 #endif /* DB_VERSION_MAJOR */ | |
| 461 | |
| 462 if (!status) | |
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463 return make_extstring ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 464 db->coding_system); |
| 428 | 465 |
| 466 #if DB_VERSION_MAJOR == 1 | |
| 467 db->dberrno = (status == 1) ? -1 : errno; | |
| 468 #else | |
| 469 db->dberrno = (status < 0) ? -1 : errno; | |
| 470 #endif /* DB_VERSION_MAJOR */ | |
| 471 | |
| 472 return Qnil; | |
| 473 } | |
| 474 | |
| 475 static int | |
| 476 berkdb_put (Lisp_Database *db, | |
| 477 Lisp_Object key, | |
| 478 Lisp_Object val, | |
| 479 Lisp_Object replace) | |
| 480 { | |
| 481 DBT keydatum, valdatum; | |
| 482 int status = 0; | |
| 483 | |
| 484 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 485 xzero (keydatum); | |
| 486 xzero (valdatum); | |
| 487 | |
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488 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.data, keydatum.size, |
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489 db->coding_system); |
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490 LISP_STRING_TO_SIZED_EXTERNAL (val, valdatum.data, valdatum.size, |
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491 db->coding_system); |
| 428 | 492 #if DB_VERSION_MAJOR == 1 |
| 493 status = db->db_handle->put (db->db_handle, &keydatum, &valdatum, | |
| 494 NILP (replace) ? R_NOOVERWRITE : 0); | |
| 495 db->dberrno = (status == 1) ? -1 : errno; | |
| 496 #else | |
| 497 status = db->db_handle->put (db->db_handle, NULL, &keydatum, &valdatum, | |
| 498 NILP (replace) ? DB_NOOVERWRITE : 0); | |
| 499 db->dberrno = (status < 0) ? -1 : errno; | |
| 500 #endif/* DV_VERSION_MAJOR = 2 */ | |
| 501 | |
| 502 return status; | |
| 503 } | |
| 504 | |
| 505 static int | |
| 506 berkdb_remove (Lisp_Database *db, Lisp_Object key) | |
| 507 { | |
| 508 DBT keydatum; | |
| 509 int status; | |
| 510 | |
| 511 /* DB Version 2 requires DBT's to be zeroed before use. */ | |
| 512 xzero (keydatum); | |
| 513 | |
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514 LISP_STRING_TO_SIZED_EXTERNAL (key, keydatum.data, keydatum.size, |
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515 db->coding_system); |
| 428 | 516 |
| 517 #if DB_VERSION_MAJOR == 1 | |
| 518 status = db->db_handle->del (db->db_handle, &keydatum, 0); | |
| 519 #else | |
| 520 status = db->db_handle->del (db->db_handle, NULL, &keydatum, 0); | |
| 521 #endif /* DB_VERSION_MAJOR */ | |
| 522 | |
| 523 if (!status) | |
| 524 return 0; | |
| 525 | |
| 526 #if DB_VERSION_MAJOR == 1 | |
| 527 db->dberrno = (status == 1) ? -1 : errno; | |
| 528 #else | |
| 529 db->dberrno = (status < 0) ? -1 : errno; | |
| 530 #endif /* DB_VERSION_MAJOR */ | |
| 531 | |
| 532 return 1; | |
| 533 } | |
| 534 | |
| 535 static void | |
| 536 berkdb_map (Lisp_Database *db, Lisp_Object func) | |
| 537 { | |
| 538 DBT keydatum, valdatum; | |
| 539 Lisp_Object key, val; | |
| 540 DB *dbp = db->db_handle; | |
| 541 int status; | |
| 542 | |
| 543 xzero (keydatum); | |
| 544 xzero (valdatum); | |
| 545 | |
| 546 #if DB_VERSION_MAJOR == 1 | |
| 547 for (status = dbp->seq (dbp, &keydatum, &valdatum, R_FIRST); | |
| 548 status == 0; | |
| 549 status = dbp->seq (dbp, &keydatum, &valdatum, R_NEXT)) | |
| 550 { | |
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551 key = make_extstring ((const Extbyte *) keydatum.data, keydatum.size, |
| 771 | 552 db->coding_system); |
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553 val = make_extstring ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 554 db->coding_system); |
| 428 | 555 call2 (func, key, val); |
| 556 } | |
| 557 #else | |
| 558 { | |
| 559 DBC *dbcp; | |
| 560 | |
| 561 #if DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >=6 | |
| 562 status = dbp->cursor (dbp, NULL, &dbcp, 0); | |
| 563 #else | |
| 564 status = dbp->cursor (dbp, NULL, &dbcp); | |
| 440 | 565 #endif |
| 428 | 566 for (status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_FIRST); |
| 567 status == 0; | |
| 568 status = dbcp->c_get (dbcp, &keydatum, &valdatum, DB_NEXT)) | |
| 569 { | |
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570 key = make_extstring ((const Extbyte *) keydatum.data, keydatum.size, |
| 771 | 571 db->coding_system); |
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572 val = make_extstring ((const Extbyte *) valdatum.data, valdatum.size, |
| 771 | 573 db->coding_system); |
| 428 | 574 call2 (func, key, val); |
| 575 } | |
| 576 dbcp->c_close (dbcp); | |
| 577 } | |
| 578 #endif /* DB_VERSION_MAJOR */ | |
| 579 } | |
| 580 | |
| 581 static void | |
| 582 berkdb_close (Lisp_Database *db) | |
| 583 { | |
| 584 if (db->db_handle) | |
| 585 { | |
| 586 #if DB_VERSION_MAJOR == 1 | |
| 587 db->db_handle->sync (db->db_handle, 0); | |
| 588 db->db_handle->close (db->db_handle); | |
| 589 #else | |
| 590 db->db_handle->sync (db->db_handle, 0); | |
| 591 db->db_handle->close (db->db_handle, 0); | |
| 592 #endif /* DB_VERSION_MAJOR */ | |
| 593 db->db_handle = NULL; | |
| 594 } | |
| 595 } | |
| 596 | |
| 597 static DB_FUNCS berk_func_block = | |
| 598 { | |
| 599 berkdb_subtype, | |
| 600 berkdb_type, | |
| 601 berkdb_get, | |
| 602 berkdb_put, | |
| 603 berkdb_remove, | |
| 604 berkdb_map, | |
| 605 berkdb_close, | |
| 606 berkdb_lasterr | |
| 607 }; | |
| 608 #endif /* HAVE_BERKELEY_DB */ | |
| 609 | |
| 610 DEFUN ("database-last-error", Fdatabase_last_error, 0, 1, 0, /* | |
| 611 Return the last error associated with DATABASE. | |
| 612 */ | |
| 613 (database)) | |
| 614 { | |
| 615 if (NILP (database)) | |
| 616 return lisp_strerror (errno); | |
| 617 | |
| 618 CHECK_DATABASE (database); | |
| 619 | |
| 620 return XDATABASE (database)->funcs->last_error (XDATABASE (database)); | |
| 621 } | |
| 622 | |
| 771 | 623 DEFUN ("open-database", Fopen_database, 1, 6, 0, /* |
| 428 | 624 Return a new database object opened on FILE. |
| 625 Optional arguments TYPE and SUBTYPE specify the database type. | |
| 626 Optional argument ACCESS specifies the access rights, which may be any | |
| 627 combination of 'r' 'w' and '+', for read, write, and creation flags. | |
| 628 Optional argument MODE gives the permissions to use when opening FILE, | |
| 629 and defaults to 0755. | |
| 771 | 630 Optional argument CODESYS specifies the coding system used to encode/decode |
| 631 data passed to/from the database, and defaults to the value of the | |
| 632 variable `database-coding-system'. | |
| 428 | 633 */ |
| 771 | 634 (file, type, subtype, access_, mode, codesys)) |
| 428 | 635 { |
| 636 /* This function can GC */ | |
| 637 int modemask; | |
| 638 int accessmask = 0; | |
| 639 Lisp_Database *db = NULL; | |
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640 Extbyte *filename; |
| 428 | 641 struct gcpro gcpro1, gcpro2; |
| 642 | |
| 643 CHECK_STRING (file); | |
| 644 GCPRO2 (file, access_); | |
| 645 file = Fexpand_file_name (file, Qnil); | |
| 646 UNGCPRO; | |
| 647 | |
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648 LISP_PATHNAME_CONVERT_OUT (file, filename); |
| 428 | 649 |
| 650 if (NILP (access_)) | |
| 651 { | |
| 652 accessmask = O_RDWR | O_CREAT; | |
| 653 } | |
| 654 else | |
| 655 { | |
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656 Ibyte *acc; |
| 428 | 657 CHECK_STRING (access_); |
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658 acc = XSTRING_DATA (access_); |
| 428 | 659 |
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660 if (qxestrchr (acc, '+')) |
| 428 | 661 accessmask |= O_CREAT; |
| 662 | |
| 663 { | |
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664 int rp = !!qxestrchr (acc, 'r'); |
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665 int wp = !!qxestrchr (acc, 'w'); |
| 428 | 666 if (rp && wp) accessmask |= O_RDWR; |
| 667 else if (wp) accessmask |= O_WRONLY; | |
| 668 else accessmask |= O_RDONLY; | |
| 669 } | |
| 670 } | |
| 671 | |
| 672 if (NILP (mode)) | |
| 673 { | |
| 674 modemask = 0755; /* rwxr-xr-x */ | |
| 675 } | |
| 676 else | |
| 677 { | |
| 678 CHECK_INT (mode); | |
| 679 modemask = XINT (mode); | |
| 680 } | |
| 681 | |
| 771 | 682 if (NILP (codesys)) |
| 683 codesys = Vdatabase_coding_system; | |
| 684 | |
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685 codesys = get_coding_system_for_text_file (codesys, 0); |
| 771 | 686 |
| 428 | 687 #ifdef HAVE_DBM |
| 688 if (NILP (type) || EQ (type, Qdbm)) | |
| 689 { | |
| 690 DBM *dbase = dbm_open (filename, accessmask, modemask); | |
| 691 if (!dbase) | |
| 692 return Qnil; | |
| 693 | |
| 694 db = allocate_database (); | |
| 695 db->dbm_handle = dbase; | |
| 696 db->funcs = &ndbm_func_block; | |
| 771 | 697 db->coding_system = codesys; |
| 428 | 698 goto db_done; |
| 699 } | |
| 700 #endif /* HAVE_DBM */ | |
| 701 | |
| 702 #ifdef HAVE_BERKELEY_DB | |
| 703 if (NILP (type) || EQ (type, Qberkeley_db)) | |
| 704 { | |
| 705 DBTYPE real_subtype; | |
| 706 DB *dbase; | |
| 707 #if DB_VERSION_MAJOR != 1 | |
| 708 int status; | |
| 709 #endif | |
| 710 | |
| 711 if (EQ (subtype, Qhash) || NILP (subtype)) | |
| 712 real_subtype = DB_HASH; | |
| 713 else if (EQ (subtype, Qbtree)) | |
| 714 real_subtype = DB_BTREE; | |
| 715 else if (EQ (subtype, Qrecno)) | |
| 716 real_subtype = DB_RECNO; | |
| 448 | 717 #if DB_VERSION_MAJOR > 2 |
| 718 else if (EQ (subtype, Qqueue)) | |
| 719 real_subtype = DB_QUEUE; | |
| 720 #endif | |
| 428 | 721 else |
| 563 | 722 invalid_constant ("Unsupported subtype", subtype); |
| 428 | 723 |
| 724 #if DB_VERSION_MAJOR == 1 | |
| 725 dbase = dbopen (filename, accessmask, modemask, real_subtype, NULL); | |
| 726 if (!dbase) | |
| 727 return Qnil; | |
| 728 #else | |
| 729 /* Berkeley DB Version 2 has only the accessmask DB_CREATE and DB_RDONLY, | |
| 730 other flags shouldn't be set */ | |
| 731 if (NILP (access_)) | |
| 732 accessmask = DB_CREATE; | |
| 733 else | |
| 734 { | |
| 735 char *acc; | |
| 736 CHECK_STRING (access_); | |
| 737 acc = (char *) XSTRING_DATA (access_); | |
| 738 accessmask = 0; | |
| 739 | |
| 740 if (strchr (acc, '+')) | |
| 741 accessmask |= DB_CREATE; | |
| 742 | |
| 743 if (strchr (acc, 'r') && !strchr (acc, 'w')) | |
| 744 accessmask |= DB_RDONLY; | |
| 745 } | |
| 448 | 746 #if DB_VERSION_MAJOR == 2 |
| 428 | 747 status = db_open (filename, real_subtype, accessmask, |
| 748 modemask, NULL , NULL, &dbase); | |
| 749 if (status) | |
| 750 return Qnil; | |
| 448 | 751 #else |
| 752 status = db_create (&dbase, NULL, 0); | |
| 753 if (status) | |
| 754 return Qnil; | |
| 1141 | 755 #if DB_VERSION_MAJOR < 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR < 1) |
| 448 | 756 status = dbase->open (dbase, filename, NULL, |
| 757 real_subtype, accessmask, modemask); | |
| 1141 | 758 #else /* DB_VERSION >= 4.1 */ |
| 1377 | 759 /* You can't use DB_AUTO_COMMIT unless you have a txn environment. */ |
| 1141 | 760 status = dbase->open (dbase, NULL, filename, NULL, real_subtype, |
| 1377 | 761 accessmask, modemask); |
| 1141 | 762 #endif /* DB_VERSION < 4.1 */ |
| 448 | 763 if (status) |
| 764 { | |
| 765 dbase->close (dbase, 0); | |
| 766 return Qnil; | |
| 767 } | |
| 768 #endif /* DB_VERSION_MAJOR > 2 */ | |
| 769 /* Normalize into system specific file modes. Only for printing */ | |
| 770 accessmask = accessmask & DB_RDONLY ? O_RDONLY : O_RDWR; | |
| 428 | 771 #endif /* DB_VERSION_MAJOR */ |
| 772 | |
| 773 db = allocate_database (); | |
| 774 db->db_handle = dbase; | |
| 775 db->funcs = &berk_func_block; | |
| 771 | 776 db->coding_system = codesys; |
| 428 | 777 goto db_done; |
| 778 } | |
| 779 #endif /* HAVE_BERKELEY_DB */ | |
| 780 | |
| 563 | 781 invalid_constant ("Unsupported database type", type); |
| 428 | 782 return Qnil; |
| 783 | |
| 784 db_done: | |
| 785 db->live_p = 1; | |
| 786 db->fname = file; | |
| 787 db->mode = modemask; | |
| 788 db->access_ = accessmask; | |
| 789 | |
| 793 | 790 return wrap_database (db); |
| 428 | 791 } |
| 792 | |
| 793 DEFUN ("put-database", Fput_database, 3, 4, 0, /* | |
| 794 Store KEY and VALUE in DATABASE. | |
| 795 If optional fourth arg REPLACE is non-nil, | |
| 796 replace any existing entry in the database. | |
| 797 */ | |
| 798 (key, value, database, replace)) | |
| 799 { | |
| 800 CHECK_LIVE_DATABASE (database); | |
| 801 CHECK_STRING (key); | |
| 802 CHECK_STRING (value); | |
| 803 { | |
| 804 Lisp_Database *db = XDATABASE (database); | |
| 805 int status = db->funcs->put (db, key, value, replace); | |
| 806 return status ? Qt : Qnil; | |
| 807 } | |
| 808 } | |
| 809 | |
| 810 DEFUN ("remove-database", Fremove_database, 2, 2, 0, /* | |
| 811 Remove KEY from DATABASE. | |
| 812 */ | |
| 813 (key, database)) | |
| 814 { | |
| 815 CHECK_LIVE_DATABASE (database); | |
| 816 CHECK_STRING (key); | |
| 817 { | |
| 818 Lisp_Database *db = XDATABASE (database); | |
| 819 int status = db->funcs->rem (db, key); | |
| 820 return status ? Qt : Qnil; | |
| 821 } | |
| 822 } | |
| 823 | |
| 824 DEFUN ("get-database", Fget_database, 2, 3, 0, /* | |
| 825 Return value for KEY in DATABASE. | |
| 826 If there is no corresponding value, return DEFAULT (defaults to nil). | |
| 827 */ | |
| 828 (key, database, default_)) | |
| 829 { | |
| 830 CHECK_LIVE_DATABASE (database); | |
| 831 CHECK_STRING (key); | |
| 832 { | |
| 833 Lisp_Database *db = XDATABASE (database); | |
| 834 Lisp_Object retval = db->funcs->get (db, key); | |
| 835 return NILP (retval) ? default_ : retval; | |
| 836 } | |
| 837 } | |
| 838 | |
| 839 DEFUN ("map-database", Fmapdatabase, 2, 2, 0, /* | |
| 840 Map FUNCTION over entries in DATABASE, calling it with two args, | |
| 841 each key and value in the database. | |
| 842 */ | |
| 843 (function, database)) | |
| 844 { | |
| 845 CHECK_LIVE_DATABASE (database); | |
| 846 | |
| 847 XDATABASE (database)->funcs->map (XDATABASE (database), function); | |
| 848 | |
| 849 return Qnil; | |
| 850 } | |
| 851 | |
| 852 void | |
| 853 syms_of_database (void) | |
| 854 { | |
|
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Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3072
diff
changeset
|
855 INIT_LISP_OBJECT (database); |
| 442 | 856 |
| 563 | 857 DEFSYMBOL (Qdatabasep); |
| 428 | 858 #ifdef HAVE_DBM |
| 563 | 859 DEFSYMBOL (Qdbm); |
| 428 | 860 #endif |
| 861 #ifdef HAVE_BERKELEY_DB | |
| 563 | 862 DEFSYMBOL (Qberkeley_db); |
| 863 DEFSYMBOL (Qhash); | |
| 864 DEFSYMBOL (Qbtree); | |
| 865 DEFSYMBOL (Qrecno); | |
| 448 | 866 #if DB_VERSION_MAJOR > 2 |
| 563 | 867 DEFSYMBOL (Qqueue); |
| 448 | 868 #endif |
| 563 | 869 DEFSYMBOL (Qunknown); |
| 428 | 870 #endif |
| 871 | |
| 872 DEFSUBR (Fopen_database); | |
| 873 DEFSUBR (Fdatabasep); | |
| 874 DEFSUBR (Fmapdatabase); | |
| 875 DEFSUBR (Fput_database); | |
| 876 DEFSUBR (Fget_database); | |
| 877 DEFSUBR (Fremove_database); | |
| 878 DEFSUBR (Fdatabase_type); | |
| 879 DEFSUBR (Fdatabase_subtype); | |
| 880 DEFSUBR (Fdatabase_last_error); | |
| 881 DEFSUBR (Fdatabase_live_p); | |
| 882 DEFSUBR (Fdatabase_file_name); | |
| 883 DEFSUBR (Fclose_database); | |
| 884 } | |
| 885 | |
| 886 void | |
| 887 vars_of_database (void) | |
| 888 { | |
| 889 #ifdef HAVE_DBM | |
| 890 Fprovide (Qdbm); | |
| 891 #endif | |
| 892 #ifdef HAVE_BERKELEY_DB | |
| 893 Fprovide (Qberkeley_db); | |
| 894 #endif | |
| 895 | |
| 896 DEFVAR_LISP ("database-coding-system", &Vdatabase_coding_system /* | |
| 771 | 897 Default coding system used to convert data in database files. |
| 428 | 898 */ ); |
| 771 | 899 Vdatabase_coding_system = Qnative; |
| 428 | 900 } |