--- /dev/null
+/****************************************************************************
+ * Copyright (c) 2006 Free Software Foundation, Inc. *
+ * *
+ * Permission is hereby granted, free of charge, to any person obtaining a *
+ * copy of this software and associated documentation files (the *
+ * "Software"), to deal in the Software without restriction, including *
+ * without limitation the rights to use, copy, modify, merge, publish, *
+ * distribute, distribute with modifications, sublicense, and/or sell *
+ * copies of the Software, and to permit persons to whom the Software is *
+ * furnished to do so, subject to the following conditions: *
+ * *
+ * The above copyright notice and this permission notice shall be included *
+ * in all copies or substantial portions of the Software. *
+ * *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+ * *
+ * Except as contained in this notice, the name(s) of the above copyright *
+ * holders shall not be used in advertising or otherwise to promote the *
+ * sale, use or other dealings in this Software without prior written *
+ * authorization. *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Author: Thomas E. Dickey 2006 *
+ ****************************************************************************/
+
+#include <curses.priv.h>
+#include <tic.h>
+#include <hashed_db.h>
+
+#if USE_HASHED_DB
+
+MODULE_ID("$Id: hashed_db.c,v 1.13 2006/08/19 19:48:38 tom Exp $")
+
+#if HASHED_DB_API >= 2
+static DBC *cursor;
+#endif
+
+/*
+ * Open the database.
+ */
+NCURSES_EXPORT(DB *)
+_nc_db_open(const char *path, bool modify)
+{
+ DB *result = 0;
+
+#if HASHED_DB_API >= 4
+ db_create(&result, NULL, 0);
+ result->open(result,
+ NULL,
+ path,
+ NULL,
+ DB_HASH,
+ modify ? DB_CREATE : DB_RDONLY,
+ 0644);
+#elif HASHED_DB_API >= 3
+ db_create(&result, NULL, 0);
+ result->open(result,
+ path,
+ NULL,
+ DB_HASH,
+ modify ? DB_CREATE : DB_RDONLY,
+ 0644);
+#elif HASHED_DB_API >= 2
+ int code;
+
+ if ((code = db_open(path,
+ DB_HASH,
+ modify ? DB_CREATE : DB_RDONLY,
+ 0644,
+ (DB_ENV *) 0,
+ (DB_INFO *) 0,
+ &result)) != 0) {
+ T(("cannot open %s: %s", path, strerror(code)));
+ result = 0;
+ } else {
+ T(("opened %s", path));
+ }
+#else
+ result = dbopen(path,
+ modify ? (O_CREAT | O_RDWR) : O_RDONLY,
+ 0644,
+ DB_HASH,
+ NULL);
+ if (result != 0) {
+ T(("opened %s", path));
+ }
+#endif
+ return result;
+}
+
+/*
+ * Close the database. Do not attempt to use the 'db' handle after this call.
+ */
+NCURSES_EXPORT(int)
+_nc_db_close(DB * db)
+{
+ int result;
+
+#if HASHED_DB_API >= 2
+ result = db->close(db, 0);
+#else
+ result = db->close(db);
+#endif
+ return result;
+}
+
+/*
+ * Write a record to the database.
+ *
+ * Returns 0 on success.
+ *
+ * FIXME: the FreeBSD cap_mkdb program assumes the database could have
+ * duplicates. There appears to be no good reason for that (review/fix).
+ */
+NCURSES_EXPORT(int)
+_nc_db_put(DB * db, DBT * key, DBT * data)
+{
+ int result;
+#if HASHED_DB_API >= 2
+ /* remove any pre-existing value, since we do not want duplicates */
+ (void) db->del(db, NULL, key, 0);
+ result = db->put(db, NULL, key, data, DB_NOOVERWRITE);
+#else
+ result = db->put(db, key, data, R_NOOVERWRITE);
+#endif
+ return result;
+}
+
+/*
+ * Read a record from the database.
+ *
+ * Returns 0 on success.
+ */
+NCURSES_EXPORT(int)
+_nc_db_get(DB * db, DBT * key, DBT * data)
+{
+ int result;
+
+ memset(data, 0, sizeof(*data));
+#if HASHED_DB_API >= 2
+ result = db->get(db, NULL, key, data, 0);
+#else
+ result = db->get(db, key, data, 0);
+#endif
+ return result;
+}
+
+/*
+ * Read the first record from the database, ignoring order.
+ *
+ * Returns 0 on success.
+ */
+NCURSES_EXPORT(int)
+_nc_db_first(DB * db, DBT * key, DBT * data)
+{
+ int result;
+
+ memset(key, 0, sizeof(*key));
+ memset(data, 0, sizeof(*data));
+#if HASHED_DB_API >= 2
+ if ((result = db->cursor(db, NULL, &cursor, 0)) == 0) {
+ result = cursor->c_get(cursor, key, data, DB_FIRST);
+ }
+#else
+ result = db->seq(db, key, data, 0);
+#endif
+ return result;
+}
+
+/*
+ * Read the next record from the database, ignoring order.
+ *
+ * Returns 0 on success.
+ */
+NCURSES_EXPORT(int)
+_nc_db_next(DB * db, DBT * key, DBT * data)
+{
+ int result;
+
+#if HASHED_DB_API >= 2
+ (void) db;
+ if (cursor != 0) {
+ result = cursor->c_get(cursor, key, data, DB_NEXT);
+ } else {
+ result = -1;
+ }
+#else
+ result = db->seq(db, key, data, 0);
+#endif
+ return result;
+}
+
+/*
+ * Check if a record is a terminfo index record. Index records are those that
+ * contain only an alias pointing to a list of aliases.
+ */
+NCURSES_EXPORT(bool)
+_nc_db_have_index(DBT * key, DBT * data, char **buffer, int *size)
+{
+ bool result = FALSE;
+ int used = data->size - 1;
+ char *have = (char *) data->data;
+
+ (void) key;
+ if (*have++ == 2) {
+ result = TRUE;
+ }
+ /*
+ * Update params in any case for consistency with _nc_db_have_data().
+ */
+ *buffer = have;
+ *size = used;
+ return result;
+}
+
+/*
+ * Check if a record is the terminfo data record. Ignore index records, e.g.,
+ * those that contain only an alias pointing to a list of aliases.
+ */
+NCURSES_EXPORT(bool)
+_nc_db_have_data(DBT * key, DBT * data, char **buffer, int *size)
+{
+ bool result = FALSE;
+ int used = data->size - 1;
+ char *have = (char *) data->data;
+
+ if (*have++ == 0) {
+ if (data->size > key->size
+ && IS_TIC_MAGIC(have)) {
+ result = TRUE;
+ }
+ }
+ /*
+ * Update params in any case to make it simple to follow a index record
+ * to the data record.
+ */
+ *buffer = have;
+ *size = used;
+ return result;
+}
+
+#else
+
+extern
+NCURSES_EXPORT(void)
+_nc_hashed_db(void);
+
+NCURSES_EXPORT(void)
+_nc_hashed_db(void)
+{
+}
+
+#endif /* USE_HASHED_DB */
projects / ncurses.git / blobdiff