[368] | 1 | /**********************************************************************
|
---|
| 2 | *
|
---|
| 3 | * infodbclass.cpp --
|
---|
| 4 | * Copyright (C) 1999 The New Zealand Digital Library Project
|
---|
| 5 | *
|
---|
[533] | 6 | * A component of the Greenstone digital library software
|
---|
| 7 | * from the New Zealand Digital Library Project at the
|
---|
| 8 | * University of Waikato, New Zealand.
|
---|
[368] | 9 | *
|
---|
[533] | 10 | * This program is free software; you can redistribute it and/or modify
|
---|
| 11 | * it under the terms of the GNU General Public License as published by
|
---|
| 12 | * the Free Software Foundation; either version 2 of the License, or
|
---|
| 13 | * (at your option) any later version.
|
---|
| 14 | *
|
---|
| 15 | * This program is distributed in the hope that it will be useful,
|
---|
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
| 18 | * GNU General Public License for more details.
|
---|
| 19 | *
|
---|
| 20 | * You should have received a copy of the GNU General Public License
|
---|
| 21 | * along with this program; if not, write to the Free Software
|
---|
| 22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
---|
| 23 | *
|
---|
[368] | 24 | *********************************************************************/
|
---|
| 25 |
|
---|
| 26 | #include "infodbclass.h"
|
---|
| 27 | #include "unitool.h"
|
---|
| 28 | #include "gsdlunicode.h"
|
---|
| 29 | #include "fileutil.h"
|
---|
| 30 | #include "OIDtools.h"
|
---|
[510] | 31 | #include <stdlib.h>
|
---|
| 32 |
|
---|
| 33 |
|
---|
| 34 |
|
---|
| 35 |
|
---|
[368] | 36 | // constructors
|
---|
| 37 | infodbclass::infodbclass () {
|
---|
| 38 | }
|
---|
| 39 |
|
---|
| 40 | void infodbclass::setinfo (const text_t &key, const text_t &value) {
|
---|
[510] | 41 | text_tarray &tarr = info[key];
|
---|
| 42 | tarr.erase(tarr.begin(), tarr.end());
|
---|
| 43 | tarr.push_back(value);
|
---|
[368] | 44 | }
|
---|
| 45 |
|
---|
| 46 | void infodbclass::setintinfo (const text_t &key, int value) {
|
---|
| 47 | setinfo (key, value);
|
---|
| 48 | }
|
---|
| 49 |
|
---|
| 50 | void infodbclass::setcinfo (const text_t &key, unsigned short c) {
|
---|
| 51 | text_t t;
|
---|
[510] | 52 | t.push_back (c);
|
---|
| 53 | setinfo (key, t);
|
---|
[368] | 54 | }
|
---|
| 55 |
|
---|
| 56 | text_t *infodbclass::getinfo (const text_t &key) {
|
---|
| 57 | iterator here = info.find (key);
|
---|
| 58 | if (here == info.end()) return NULL;
|
---|
| 59 |
|
---|
[510] | 60 | if ((*here).second.empty()) return NULL;
|
---|
| 61 |
|
---|
| 62 | return &((*here).second[0]);
|
---|
[368] | 63 | }
|
---|
| 64 |
|
---|
| 65 | int infodbclass::getintinfo (const text_t &key) {
|
---|
| 66 | text_t *t = getinfo (key);
|
---|
| 67 | if (t == NULL) return 0;
|
---|
| 68 | return t->getint();
|
---|
| 69 | }
|
---|
| 70 |
|
---|
[510] | 71 | text_t &infodbclass::operator[] (const text_t &key) {
|
---|
| 72 | text_tarray &tarr = info[key];
|
---|
| 73 | if (tarr.empty()) {
|
---|
| 74 | text_t e;
|
---|
| 75 | tarr.push_back(e);
|
---|
| 76 | }
|
---|
| 77 | return tarr[0];
|
---|
| 78 | }
|
---|
[368] | 79 |
|
---|
| 80 |
|
---|
[510] | 81 | void infodbclass::addinfo (const text_t &key, const text_t &value) {
|
---|
| 82 | text_tarray &tarr = info[key];
|
---|
| 83 | tarr.push_back (value);
|
---|
| 84 | }
|
---|
[368] | 85 |
|
---|
[510] | 86 | void infodbclass::addintinfo (const text_t &key, int value) {
|
---|
| 87 | addinfo (key, value);
|
---|
| 88 | }
|
---|
| 89 |
|
---|
| 90 | void infodbclass::addcinfo (const text_t &key, unsigned short c) {
|
---|
| 91 | text_t t;
|
---|
| 92 | t.push_back(c);
|
---|
| 93 | addinfo (key, t);
|
---|
| 94 | }
|
---|
| 95 |
|
---|
| 96 | text_tarray *infodbclass::getmultinfo (const text_t &key) {
|
---|
| 97 | iterator here = info.find (key);
|
---|
| 98 | if (here == info.end()) return NULL;
|
---|
| 99 |
|
---|
| 100 | return &((*here).second);
|
---|
| 101 | }
|
---|
| 102 |
|
---|
| 103 |
|
---|
[1459] | 104 | gdbmclass::~gdbmclass() {
|
---|
| 105 | closedatabase();
|
---|
| 106 | }
|
---|
[510] | 107 |
|
---|
[368] | 108 | // returns true if opened
|
---|
[510] | 109 | bool gdbmclass::opendatabase (const text_t &filename, int mode, int num_retrys,
|
---|
[722] | 110 | #ifdef __WIN32__
|
---|
| 111 | bool need_filelock
|
---|
| 112 | #else
|
---|
| 113 | bool
|
---|
| 114 | #endif
|
---|
| 115 | ) {
|
---|
[368] | 116 | text_t data_location;
|
---|
| 117 | int block_size = 512;
|
---|
| 118 |
|
---|
| 119 | if (gdbmfile != NULL) {
|
---|
| 120 | if (openfile == filename) return true;
|
---|
| 121 | else closedatabase ();
|
---|
| 122 | }
|
---|
| 123 |
|
---|
| 124 | openfile = filename;
|
---|
[1149] | 125 |
|
---|
[368] | 126 | char *namebuffer = filename.getcstr();
|
---|
| 127 | do {
|
---|
[510] | 128 | #ifdef __WIN32__
|
---|
[1149] | 129 | gdbmfile = gdbm_open (namebuffer, block_size, mode, 00664, NULL, (need_filelock) ? 1 : 0);
|
---|
[510] | 130 | #else
|
---|
[368] | 131 | gdbmfile = gdbm_open (namebuffer, block_size, mode, 00664, NULL);
|
---|
[510] | 132 | #endif
|
---|
[368] | 133 | num_retrys--;
|
---|
| 134 | } while (num_retrys>0 && gdbmfile==NULL &&
|
---|
| 135 | (gdbm_errno==GDBM_CANT_BE_READER || gdbm_errno==GDBM_CANT_BE_WRITER));
|
---|
| 136 | delete namebuffer;
|
---|
[1149] | 137 |
|
---|
[368] | 138 | if (gdbmfile == NULL && logout != NULL) {
|
---|
| 139 | outconvertclass text_t2ascii;
|
---|
| 140 | (*logout) << text_t2ascii << "database open failed on: " << filename << "\n";
|
---|
| 141 | }
|
---|
| 142 |
|
---|
| 143 | return (gdbmfile != NULL);
|
---|
| 144 | }
|
---|
| 145 |
|
---|
| 146 | void gdbmclass::closedatabase () {
|
---|
| 147 | if (gdbmfile == NULL) return;
|
---|
| 148 |
|
---|
| 149 | gdbm_close (gdbmfile);
|
---|
| 150 | gdbmfile = NULL;
|
---|
| 151 | openfile.clear();
|
---|
| 152 | }
|
---|
| 153 |
|
---|
| 154 |
|
---|
| 155 | // returns true on success
|
---|
| 156 | bool gdbmclass::setinfo (const text_t &key, const infodbclass &info) {
|
---|
| 157 | if (gdbmfile == NULL) return false;
|
---|
| 158 |
|
---|
[510] | 159 | text_t subkey;
|
---|
[368] | 160 | text_t data;
|
---|
| 161 |
|
---|
| 162 | // get all the keys and values
|
---|
| 163 | infodbclass::const_iterator info_here = info.begin();
|
---|
| 164 | infodbclass::const_iterator info_end = info.end();
|
---|
| 165 | while (info_here != info_end) {
|
---|
| 166 | // add the key
|
---|
[510] | 167 | subkey.clear();
|
---|
| 168 | subkey.push_back('<');
|
---|
[368] | 169 | text_t::const_iterator subkey_here = (*info_here).first.begin();
|
---|
| 170 | text_t::const_iterator subkey_end = (*info_here).first.end();
|
---|
| 171 | while (subkey_here != subkey_end) {
|
---|
| 172 | if (*subkey_here == '>') {
|
---|
[510] | 173 | subkey.push_back('\\'); subkey.push_back('>');
|
---|
[368] | 174 | } else if (*subkey_here == '\n') {
|
---|
[510] | 175 | subkey.push_back('\\'); subkey.push_back('n');
|
---|
[368] | 176 | } else if (*subkey_here == '\r') {
|
---|
[510] | 177 | subkey.push_back('\\'); subkey.push_back('r');
|
---|
[368] | 178 | } else {
|
---|
[510] | 179 | subkey.push_back (*subkey_here);
|
---|
[368] | 180 | }
|
---|
| 181 | subkey_here++;
|
---|
| 182 | }
|
---|
[510] | 183 | subkey.push_back('>');
|
---|
[368] | 184 |
|
---|
[510] | 185 | // add the values
|
---|
| 186 | text_tarray::const_iterator subvalue_here = (*info_here).second.begin();
|
---|
| 187 | text_tarray::const_iterator subvalue_end = (*info_here).second.end();
|
---|
[368] | 188 | while (subvalue_here != subvalue_end) {
|
---|
[510] | 189 | data += subkey;
|
---|
| 190 |
|
---|
| 191 | text_t::const_iterator thissubvalue_here = (*subvalue_here).begin();
|
---|
| 192 | text_t::const_iterator thissubvalue_end = (*subvalue_here).end();
|
---|
| 193 | while (thissubvalue_here != thissubvalue_end) {
|
---|
| 194 | if (*thissubvalue_here == '>') {
|
---|
| 195 | data.push_back('\\'); data.push_back('>');
|
---|
| 196 | } else if (*thissubvalue_here == '\n') {
|
---|
| 197 | data.push_back('\\'); data.push_back('n');
|
---|
| 198 | } else if (*thissubvalue_here == '\r') {
|
---|
| 199 | data.push_back('\\'); data.push_back('r');
|
---|
| 200 | } else {
|
---|
| 201 | data.push_back (*thissubvalue_here);
|
---|
| 202 | }
|
---|
| 203 |
|
---|
| 204 | thissubvalue_here++;
|
---|
[368] | 205 | }
|
---|
[510] | 206 |
|
---|
| 207 | data.push_back('\n');
|
---|
[368] | 208 | subvalue_here++;
|
---|
| 209 | }
|
---|
[510] | 210 |
|
---|
[368] | 211 | info_here++;
|
---|
| 212 | }
|
---|
| 213 |
|
---|
| 214 | // store the value
|
---|
| 215 | datum key_data;
|
---|
| 216 | datum data_data;
|
---|
| 217 |
|
---|
| 218 | // get a utf-8 encoded c string of the unicode key
|
---|
| 219 | key_data.dptr = (to_utf8(key)).getcstr();
|
---|
| 220 | if (key_data.dptr == NULL) {
|
---|
| 221 | if (logout != NULL) (*logout) << "gdbmclass: out of memory\n";
|
---|
| 222 | return false;
|
---|
| 223 | }
|
---|
| 224 | key_data.dsize = strlen (key_data.dptr);
|
---|
| 225 |
|
---|
| 226 | data_data.dptr = (to_utf8(data)).getcstr();
|
---|
| 227 | if (data_data.dptr == NULL) {
|
---|
| 228 | if (logout != NULL) (*logout) << "gdbmclass: out of memory\n";
|
---|
| 229 | delete key_data.dptr;
|
---|
| 230 | }
|
---|
| 231 | data_data.dsize = strlen (data_data.dptr);
|
---|
| 232 |
|
---|
| 233 | int ret = gdbm_store (gdbmfile, key_data, data_data, GDBM_REPLACE);
|
---|
| 234 | delete key_data.dptr;
|
---|
| 235 | delete data_data.dptr;
|
---|
| 236 |
|
---|
| 237 | return (ret == 0);
|
---|
[928] | 238 |
|
---|
[368] | 239 | }
|
---|
| 240 |
|
---|
[928] | 241 | //returns true on success
|
---|
| 242 | bool gdbmclass::setinfo (const text_t &key, const text_t &data) {
|
---|
| 243 | if (gdbmfile == NULL) return false;
|
---|
| 244 |
|
---|
| 245 | // store the value
|
---|
| 246 | datum key_data;
|
---|
| 247 | datum data_data;
|
---|
[368] | 248 |
|
---|
[928] | 249 | // get a utf-8 encoded c string of the unicode key
|
---|
| 250 | key_data.dptr = (to_utf8(key)).getcstr();
|
---|
| 251 | if (key_data.dptr == NULL) {
|
---|
| 252 | if (logout != NULL) (*logout) << "gdbmclass: out of memory\n";
|
---|
| 253 | return false;
|
---|
| 254 | }
|
---|
| 255 | key_data.dsize = strlen (key_data.dptr);
|
---|
| 256 |
|
---|
| 257 | data_data.dptr = (to_utf8(data)).getcstr();
|
---|
| 258 | if (data_data.dptr == NULL) {
|
---|
| 259 | if (logout != NULL) (*logout) << "gdbmclass: out of memory\n";
|
---|
| 260 | delete key_data.dptr;
|
---|
| 261 | }
|
---|
| 262 | data_data.dsize = strlen (data_data.dptr);
|
---|
| 263 |
|
---|
| 264 | int ret = gdbm_store (gdbmfile, key_data, data_data, GDBM_REPLACE);
|
---|
| 265 | delete key_data.dptr;
|
---|
| 266 | delete data_data.dptr;
|
---|
| 267 |
|
---|
| 268 | return (ret == 0);
|
---|
| 269 |
|
---|
| 270 | }
|
---|
| 271 |
|
---|
| 272 |
|
---|
[375] | 273 | void gdbmclass::deletekey (const text_t &key) {
|
---|
| 274 | if (gdbmfile == NULL) return;
|
---|
[368] | 275 |
|
---|
[375] | 276 | // get a utf-8 encoded c string of the unicode key
|
---|
| 277 | datum key_data;
|
---|
| 278 | key_data.dptr = (to_utf8(key)).getcstr();
|
---|
| 279 | if (key_data.dptr == NULL) return;
|
---|
| 280 | key_data.dsize = strlen (key_data.dptr);
|
---|
| 281 |
|
---|
| 282 | // delete the key
|
---|
| 283 | gdbm_delete (gdbmfile, key_data);
|
---|
| 284 |
|
---|
| 285 | // free up the key memory
|
---|
| 286 | delete key_data.dptr;
|
---|
| 287 | }
|
---|
| 288 |
|
---|
| 289 |
|
---|
| 290 | // getfirstkey and getnextkey are used for traversing the database
|
---|
| 291 | // no insertions or deletions should be carried out while traversing
|
---|
| 292 | // the database. when there are no keys left to visit in the database
|
---|
| 293 | // an empty string is returned.
|
---|
| 294 | text_t gdbmclass::getfirstkey () {
|
---|
| 295 | if (gdbmfile == NULL) return "";
|
---|
| 296 |
|
---|
| 297 | // get the first key
|
---|
| 298 | datum firstkey_data = gdbm_firstkey (gdbmfile);
|
---|
| 299 | if (firstkey_data.dptr == NULL) return "";
|
---|
| 300 |
|
---|
| 301 | // convert it to text_t
|
---|
| 302 | text_t firstkey;
|
---|
| 303 | firstkey.setcarr (firstkey_data.dptr, firstkey_data.dsize);
|
---|
| 304 | free (firstkey_data.dptr);
|
---|
| 305 | return to_uni(firstkey); // convert to unicode
|
---|
| 306 | }
|
---|
| 307 |
|
---|
| 308 | text_t gdbmclass::getnextkey (const text_t &key) {
|
---|
| 309 | if (gdbmfile == NULL || key.empty()) return "";
|
---|
| 310 |
|
---|
| 311 | // get a utf-8 encoded c string of the unicode key
|
---|
| 312 | datum key_data;
|
---|
| 313 | key_data.dptr = (to_utf8(key)).getcstr();
|
---|
| 314 | if (key_data.dptr == NULL) return "";
|
---|
| 315 | key_data.dsize = strlen (key_data.dptr);
|
---|
| 316 |
|
---|
| 317 | // get the next key
|
---|
| 318 | datum nextkey_data = gdbm_nextkey (gdbmfile, key_data);
|
---|
| 319 | if (nextkey_data.dptr == NULL) {
|
---|
| 320 | delete key_data.dptr;
|
---|
| 321 | return "";
|
---|
| 322 | }
|
---|
| 323 |
|
---|
| 324 | // convert it to text_t
|
---|
| 325 | text_t nextkey;
|
---|
| 326 | nextkey.setcarr (nextkey_data.dptr, nextkey_data.dsize);
|
---|
| 327 | free (nextkey_data.dptr);
|
---|
| 328 | delete key_data.dptr;
|
---|
| 329 | return to_uni(nextkey); // convert to unicode
|
---|
| 330 | }
|
---|
| 331 |
|
---|
| 332 |
|
---|
[368] | 333 | // replaces the .fc, .lc, .pr, .ns and .ps syntax (first child,
|
---|
| 334 | // last child, parent, next sibling, previous sibling)
|
---|
| 335 | // it expects child, parent, etc. to exist if syntax has been used
|
---|
| 336 | // so you should test before using
|
---|
| 337 | text_t gdbmclass::translate_OID (const text_t &inOID, infodbclass &info) {
|
---|
| 338 |
|
---|
| 339 | if (inOID.size() < 4) return inOID;
|
---|
| 340 | if (findchar (inOID.begin(), inOID.end(), '.') == inOID.end()) return inOID;
|
---|
| 341 |
|
---|
| 342 | text_t OID = inOID;
|
---|
| 343 | text_tarray tailarray;
|
---|
| 344 | text_t tail = substr (OID.end()-3, OID.end());
|
---|
| 345 | while (tail == ".fc" || tail == ".lc" || tail == ".pr" ||
|
---|
| 346 | tail == ".ns" || tail == ".ps") {
|
---|
| 347 | tailarray.push_back(tail);
|
---|
| 348 | OID.erase (OID.end()-3, OID.end());
|
---|
| 349 | tail = substr (OID.end()-3, OID.end());
|
---|
| 350 | }
|
---|
| 351 |
|
---|
| 352 | if (!tailarray.size()) return inOID;
|
---|
| 353 | text_tarray::const_iterator begin = tailarray.begin();
|
---|
| 354 | text_tarray::const_iterator here = tailarray.end() - 1;
|
---|
| 355 |
|
---|
| 356 | while (here >= begin) {
|
---|
| 357 |
|
---|
| 358 | if (*here == ".fc")
|
---|
| 359 | get_first_child (OID, info);
|
---|
| 360 | else if (*here == ".lc")
|
---|
| 361 | get_last_child (OID, info);
|
---|
| 362 | else if (*here == ".pr")
|
---|
| 363 | OID = get_parent (OID);
|
---|
| 364 | else if (*here == ".ns")
|
---|
| 365 | get_next_sibling (OID, info);
|
---|
| 366 | else if (*here == ".ps")
|
---|
| 367 | get_previous_sibling (OID, info);
|
---|
| 368 |
|
---|
| 369 | here --;
|
---|
| 370 | }
|
---|
| 371 | return OID;
|
---|
| 372 | }
|
---|
| 373 |
|
---|
| 374 | void gdbmclass::get_first_child (text_t &OID, infodbclass &info) {
|
---|
| 375 |
|
---|
| 376 | text_t firstchild;
|
---|
| 377 | if (getinfo (OID, info)) {
|
---|
| 378 | text_t &contains = info["contains"];
|
---|
| 379 | if (!contains.empty()) {
|
---|
| 380 | text_t parent = OID;
|
---|
| 381 | getdelimitstr (contains.begin(), contains.end(), ';', firstchild);
|
---|
| 382 | if (firstchild.empty()) OID = contains;
|
---|
| 383 | else OID = firstchild;
|
---|
| 384 | if (*(OID.begin()) == '"') translate_parent (OID, parent);
|
---|
| 385 | }
|
---|
| 386 | }
|
---|
| 387 | }
|
---|
| 388 |
|
---|
| 389 | void gdbmclass::get_last_child (text_t &OID, infodbclass &info) {
|
---|
| 390 |
|
---|
| 391 | text_tarray children;
|
---|
| 392 | if (getinfo (OID, info)) {
|
---|
| 393 | text_t &contains = info["contains"];
|
---|
| 394 | if (!contains.empty()) {
|
---|
| 395 | text_t parent = OID;
|
---|
| 396 | splitchar (contains.begin(), contains.end(), ';', children);
|
---|
| 397 | OID = children.back();
|
---|
| 398 | if (*(OID.begin()) == '"') translate_parent (OID, parent);
|
---|
| 399 | }
|
---|
| 400 | }
|
---|
| 401 | }
|
---|
| 402 |
|
---|
| 403 | void gdbmclass::get_next_sibling (text_t &OID, infodbclass &info) {
|
---|
| 404 |
|
---|
| 405 | text_tarray siblings;
|
---|
| 406 | text_t parent = get_parent (OID);
|
---|
| 407 |
|
---|
| 408 | if (getinfo (parent, info)) {
|
---|
| 409 | text_t &contains = info["contains"];
|
---|
| 410 | if (!contains.empty()) {
|
---|
| 411 | splitchar (contains.begin(), contains.end(), ';', siblings);
|
---|
| 412 | text_tarray::const_iterator here = siblings.begin();
|
---|
| 413 | text_tarray::const_iterator end = siblings.end();
|
---|
| 414 | text_t shrunk_OID = OID;
|
---|
| 415 | shrink_parent (shrunk_OID);
|
---|
| 416 | while (here != end) {
|
---|
| 417 | if (*here == shrunk_OID && (here+1 != end)) {
|
---|
| 418 | OID = *(here+1);
|
---|
| 419 | if (*(OID.begin()) == '"') translate_parent (OID, parent);
|
---|
| 420 | break;
|
---|
| 421 | }
|
---|
| 422 | here ++;
|
---|
| 423 | }
|
---|
| 424 | }
|
---|
| 425 | }
|
---|
| 426 | }
|
---|
| 427 |
|
---|
| 428 | void gdbmclass::get_previous_sibling (text_t &OID, infodbclass &info) {
|
---|
| 429 |
|
---|
| 430 | text_tarray siblings;
|
---|
| 431 | text_t parent = get_parent (OID);
|
---|
| 432 |
|
---|
| 433 | if (getinfo (parent, info)) {
|
---|
| 434 | text_t &contains = info["contains"];
|
---|
| 435 | if (!contains.empty()) {
|
---|
| 436 | splitchar (contains.begin(), contains.end(), ';', siblings);
|
---|
| 437 | text_tarray::const_iterator here = siblings.begin();
|
---|
| 438 | text_tarray::const_iterator end = siblings.end();
|
---|
| 439 | text_t shrunk_OID = OID;
|
---|
| 440 | shrink_parent (shrunk_OID);
|
---|
| 441 | while (here != end) {
|
---|
| 442 | if (*here == shrunk_OID && (here != siblings.begin())) {
|
---|
| 443 | OID = *(here-1);
|
---|
| 444 | if (*(OID.begin()) == '"') translate_parent (OID, parent);
|
---|
| 445 | break;
|
---|
| 446 | }
|
---|
| 447 | here ++;
|
---|
| 448 | }
|
---|
| 449 | }
|
---|
| 450 | }
|
---|
| 451 | }
|
---|
| 452 |
|
---|
| 453 | // returns true on success
|
---|
| 454 | bool gdbmclass::getinfo (text_t key, infodbclass &info) {
|
---|
| 455 | text_t data;
|
---|
| 456 |
|
---|
| 457 | if (!getkeydata (key, data)) return false;
|
---|
| 458 | text_t::iterator here = data.begin ();
|
---|
| 459 | text_t::iterator end = data.end ();
|
---|
| 460 |
|
---|
| 461 | text_t ikey, ivalue;
|
---|
| 462 | info.clear (); // reset info
|
---|
| 463 |
|
---|
[510] | 464 | while (getinfoline (here, end, ikey, ivalue)) {
|
---|
| 465 | info.addinfo (ikey, ivalue);
|
---|
[368] | 466 | }
|
---|
| 467 |
|
---|
| 468 | return true;
|
---|
| 469 | }
|
---|
| 470 |
|
---|
| 471 | // returns true if exists
|
---|
| 472 | bool gdbmclass::exists (text_t key) {
|
---|
| 473 | text_t data;
|
---|
| 474 | return getkeydata (key, data);
|
---|
| 475 | }
|
---|
| 476 |
|
---|
| 477 | // returns true on success
|
---|
| 478 | bool gdbmclass::getkeydata (text_t key, text_t &data) {
|
---|
| 479 | datum key_data;
|
---|
| 480 | datum return_data;
|
---|
| 481 |
|
---|
| 482 | if (gdbmfile == NULL) return false;
|
---|
| 483 |
|
---|
| 484 | // get a utf-8 encoded c string of the unicode key
|
---|
| 485 | key_data.dptr = (to_utf8(key)).getcstr();
|
---|
| 486 | if (key_data.dptr == NULL) {
|
---|
| 487 | if (logout != NULL) (*logout) << "gdbmclass: out of memory\n";
|
---|
| 488 | return false;
|
---|
| 489 | }
|
---|
| 490 | key_data.dsize = strlen (key_data.dptr);
|
---|
| 491 |
|
---|
| 492 | // fetch the result
|
---|
| 493 | return_data = gdbm_fetch (gdbmfile, key_data);
|
---|
| 494 | delete key_data.dptr;
|
---|
| 495 |
|
---|
| 496 | if (return_data.dptr == NULL) return false;
|
---|
| 497 |
|
---|
| 498 | data.setcarr (return_data.dptr, return_data.dsize);
|
---|
| 499 | free (return_data.dptr);
|
---|
| 500 | data = to_uni(data); // convert to unicode
|
---|
| 501 |
|
---|
| 502 | return true;
|
---|
| 503 | }
|
---|
| 504 |
|
---|
| 505 | // returns true on success
|
---|
| 506 | bool gdbmclass::getinfoline (text_t::iterator &here, text_t::iterator end,
|
---|
| 507 | text_t &key, text_t &value) {
|
---|
| 508 | key.clear();
|
---|
| 509 | value.clear();
|
---|
| 510 |
|
---|
| 511 | // ignore white space
|
---|
| 512 | while (here != end && is_unicode_space (*here)) here++;
|
---|
| 513 |
|
---|
| 514 | // get the '<'
|
---|
| 515 | if (here == end || *here != '<') return false;
|
---|
| 516 | here++;
|
---|
| 517 |
|
---|
| 518 | // get the key
|
---|
| 519 | while (here != end && *here != '>') {
|
---|
| 520 | key.push_back(*here);
|
---|
| 521 | here++;
|
---|
| 522 | }
|
---|
| 523 |
|
---|
| 524 | // get the '>'
|
---|
| 525 | if (here == end || *here != '>') return false;
|
---|
| 526 | here++;
|
---|
| 527 |
|
---|
| 528 | // get the value
|
---|
| 529 | while (here != end && *here != '\n') {
|
---|
| 530 | if (*here == '\\') {
|
---|
| 531 | // found escape character
|
---|
| 532 | here++;
|
---|
| 533 | if (here != end) {
|
---|
| 534 | if (*here == 'n') value.push_back ('\n');
|
---|
| 535 | else if (*here == 'r') value.push_back ('\r');
|
---|
| 536 | else value.push_back(*here);
|
---|
| 537 | }
|
---|
| 538 |
|
---|
| 539 | } else {
|
---|
| 540 | // a normal character
|
---|
| 541 | value.push_back(*here);
|
---|
| 542 | }
|
---|
| 543 |
|
---|
| 544 | here++;
|
---|
| 545 | }
|
---|
| 546 |
|
---|
| 547 | return true;
|
---|
| 548 | }
|
---|