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+/* header for lookup.c
+ *
+ * Copyright 2013-2023 Adiscon GmbH.
+ *
+ * This file is part of the rsyslog runtime library.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * -or-
+ * see COPYING.ASL20 in the source distribution
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef INCLUDED_LOOKUP_H
+#define INCLUDED_LOOKUP_H
+#include <libestr.h>
+
+#define STRING_LOOKUP_TABLE 1
+#define ARRAY_LOOKUP_TABLE 2
+#define SPARSE_ARRAY_LOOKUP_TABLE 3
+#define STUBBED_LOOKUP_TABLE 4
+
+#define LOOKUP_KEY_TYPE_STRING 1
+#define LOOKUP_KEY_TYPE_UINT 2
+#define LOOKUP_KEY_TYPE_NONE 3
+
+struct lookup_tables_s {
+ lookup_ref_t *root; /* the root of the template list */
+ lookup_ref_t *last; /* points to the last element of the template list */
+};
+
+struct lookup_array_tab_s {
+ uint32_t first_key;
+ uchar **interned_val_refs;
+};
+
+struct lookup_sparseArray_tab_entry_s {
+ uint32_t key;
+ uchar *interned_val_ref;
+};
+
+struct lookup_sparseArray_tab_s {
+ lookup_sparseArray_tab_entry_t *entries;
+};
+
+struct lookup_string_tab_entry_s {
+ uchar *key;
+ uchar *interned_val_ref;
+};
+
+struct lookup_string_tab_s {
+ lookup_string_tab_entry_t *entries;
+};
+
+struct lookup_ref_s {
+ pthread_rwlock_t rwlock; /* protect us in case of dynamic reloads */
+ uchar *name;
+ uchar *filename;
+ lookup_t *self;
+ lookup_ref_t *next;
+ /* reload specific attributes */
+ pthread_mutex_t reloader_mut; /* signaling + access to reload-flow variables*/
+ /* rwlock(above) may be acquired inside critical-section reloader_mut guards */
+ pthread_cond_t run_reloader;
+ pthread_t reloader;
+ pthread_attr_t reloader_thd_attr;
+ uchar *stub_value_for_reload_failure;
+ uint8_t do_reload;
+ uint8_t do_stop;
+ uint8_t reload_on_hup;
+};
+
+typedef es_str_t* (lookup_fn_t)(lookup_t*, lookup_key_t);
+
+/* a single lookup table */
+struct lookup_s {
+ uint32_t nmemb;
+ uint8_t type;
+ uint8_t key_type;
+ union {
+ lookup_string_tab_t *str;
+ lookup_array_tab_t *arr;
+ lookup_sparseArray_tab_t *sprsArr;
+ } table;
+ uint32_t interned_val_count;
+ uchar **interned_vals;
+ uchar *nomatch;
+ lookup_fn_t *lookup;
+};
+
+union lookup_key_u {
+ uchar* k_str;
+ uint32_t k_uint;
+};
+
+/* prototypes */
+void lookupInitCnf(lookup_tables_t *lu_tabs);
+rsRetVal lookupTableDefProcessCnf(struct cnfobj *o);
+lookup_ref_t *lookupFindTable(uchar *name);
+es_str_t * lookupKey(lookup_ref_t *pThis, lookup_key_t key);
+void lookupDestroyCnf(void);
+void lookupClassExit(void);
+void lookupDoHUP(void);
+rsRetVal lookupReload(lookup_ref_t *pThis, const uchar *stub_value_if_reload_fails);
+uint lookupPendingReloadCount(void);
+rsRetVal lookupClassInit(void);
+void lookupActivateConf(void);
+
+#endif /* #ifndef INCLUDED_LOOKUP_H */