ncurses 6.4 - patch 20230624

[ncurses.git] / ncurses / tinfo / comp_hash.c

diff --git a/ncurses/tinfo/comp_hash.c b/ncurses/tinfo/comp_hash.c
index 959c6e156431121f9ba652c84ef9f8c475212167..4b081afa2c2842d1ef18587c53ddd4d766472908 100644 (file)
--- a/ncurses/tinfo/comp_hash.c
+++ b/ncurses/tinfo/comp_hash.c
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 1998-2008,2009 Free Software Foundation, Inc.              *
+ * Copyright 2019-2020,2023 Thomas E. Dickey                                *
+ * Copyright 1998-2008,2009 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            *
@@ -44,13 +45,12 @@
 #include <tic.h>
 #include <hashsize.h>
 
-MODULE_ID("$Id: comp_hash.c,v 1.48 2009/08/08 17:36:21 tom Exp $")
+MODULE_ID("$Id: comp_hash.c,v 1.55 2023/06/24 13:29:43 tom Exp $")
 
 /*
  * Finds the entry for the given string in the hash table if present.
  * Returns a pointer to the entry in the table or 0 if not found.
  */
-/* entrypoint used by tack (do not alter) */
 NCURSES_EXPORT(struct name_table_entry const *)
 _nc_find_entry(const char *string,
               const HashValue * hash_table)
@@ -63,7 +63,9 @@ _nc_find_entry(const char *string,
 
     hashvalue = data->hash_of(string);
 
-    if (data->table_data[hashvalue] >= 0) {
+    if (hashvalue >= 0
+       && (unsigned) hashvalue < data->table_size
+       && data->table_data[hashvalue] >= 0) {
 
        real_table = _nc_get_table(termcap);
        ptr = real_table + data->table_data[hashvalue];
@@ -96,19 +98,54 @@ _nc_find_type_entry(const char *string,
     const HashData *data = _nc_get_hash_info(termcap);
     int hashvalue = data->hash_of(string);
 
-    if (data->table_data[hashvalue] >= 0) {
+    if (hashvalue >= 0
+       && (unsigned) hashvalue < data->table_size
+       && data->table_data[hashvalue] >= 0) {
        const struct name_table_entry *const table = _nc_get_table(termcap);
 
-       ptr = table + data->table_data[hashvalue];
-       while (ptr->nte_type != type
-              || !data->compare_names(ptr->nte_name, string)) {
-           if (ptr->nte_link < 0) {
+       if (table != NULL) {
+           ptr = table + data->table_data[hashvalue];
+           while (ptr->nte_type != type
+                  || !data->compare_names(ptr->nte_name, string)) {
+               if (ptr->nte_link < 0) {
+                   ptr = 0;
+                   break;
+               }
+               ptr = table + (ptr->nte_link + data->table_data[data->table_size]);
+           }
+       }
+    }
+
+    return ptr;
+}
+
+#if NCURSES_XNAMES
+NCURSES_EXPORT(struct user_table_entry const *)
+_nc_find_user_entry(const char *string)
+{
+    const HashData *data = _nc_get_hash_user();
+    int hashvalue;
+    struct user_table_entry const *ptr = 0;
+    struct user_table_entry const *real_table;
+
+    hashvalue = data->hash_of(string);
+
+    if (hashvalue >= 0
+       && (unsigned) hashvalue < data->table_size
+       && data->table_data[hashvalue] >= 0) {
+
+       real_table = _nc_get_userdefs_table();
+       ptr = real_table + data->table_data[hashvalue];
+       while (!data->compare_names(ptr->ute_name, string)) {
+           if (ptr->ute_link < 0) {
                ptr = 0;
                break;
            }
-           ptr = table + (ptr->nte_link + data->table_data[data->table_size]);
+           ptr = real_table + (ptr->ute_link
+                               + data->table_data[data->table_size]);
        }
     }
 
-    return ptr;
+    return (ptr);
 }
+#endif /* NCURSES_XNAMES */