hush: get rid of charmap[]

[oweals/busybox.git] / libbb / inode_hash.c

diff --git a/libbb/inode_hash.c b/libbb/inode_hash.c
index 52c54cdc17422e9f91153e57e31013aa97dcff6e..b32bd26bf684bf2e6254e86c0ca45af9aa3ea19b 100644 (file)
--- a/libbb/inode_hash.c
+++ b/libbb/inode_hash.c
@@ -2,101 +2,86 @@
 /*
  * Utility routines.
  *
- * Copyright (C) many different people.  If you wrote this, please
- * acknowledge your work.
+ * Copyright (C) many different people.
+ * If you wrote this, please acknowledge your work.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
 #include "libbb.h"
 
+typedef struct ino_dev_hash_bucket_struct {
+       struct ino_dev_hash_bucket_struct *next;
+       ino_t ino;
+       dev_t dev;
+       char name[1];
+} ino_dev_hashtable_bucket_t;
+
 #define HASH_SIZE      311             /* Should be prime */
 #define hash_inode(i)  ((i) % HASH_SIZE)
 
-static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE];
+/* array of [HASH_SIZE] elements */
+static ino_dev_hashtable_bucket_t **ino_dev_hashtable;
 
 /*
- * Return 1 if statbuf->st_ino && statbuf->st_dev are recorded in
- * `ino_dev_hashtable', else return 0
- *
- * If NAME is a non-NULL pointer to a character pointer, and there is
- * a match, then set *NAME to the value of the name slot in that
- * bucket.
+ * Return name if statbuf->st_ino && statbuf->st_dev are recorded in
+ * ino_dev_hashtable, else return NULL
  */
-int is_in_ino_dev_hashtable(const struct stat *statbuf, char **name)
+char* FAST_FUNC is_in_ino_dev_hashtable(const struct stat *statbuf)
 {
        ino_dev_hashtable_bucket_t *bucket;
 
+       if (!ino_dev_hashtable)
+               return NULL;
+
        bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)];
        while (bucket != NULL) {
-         if ((bucket->ino == statbuf->st_ino) &&
-                 (bucket->dev == statbuf->st_dev))
-         {
-               if (name) *name = bucket->name;
-               return 1;
-         }
-         bucket = bucket->next;
+               if ((bucket->ino == statbuf->st_ino)
+                && (bucket->dev == statbuf->st_dev)
+               ) {
+                       return bucket->name;
+               }
+               bucket = bucket->next;
        }
-       return 0;
+       return NULL;
 }
 
 /* Add statbuf to statbuf hash table */
-void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name)
+void FAST_FUNC add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name)
 {
        int i;
-       size_t s;
        ino_dev_hashtable_bucket_t *bucket;
-    
+
        i = hash_inode(statbuf->st_ino);
-       s = name ? strlen(name) : 0;
-       bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + s);
+       if (!name)
+               name = "";
+       bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + strlen(name));
        bucket->ino = statbuf->st_ino;
        bucket->dev = statbuf->st_dev;
-       if (name)
-               strcpy(bucket->name, name);
-       else
-               bucket->name[0] = '\0';
+       strcpy(bucket->name, name);
+
+       if (!ino_dev_hashtable)
+               ino_dev_hashtable = xzalloc(HASH_SIZE * sizeof(*ino_dev_hashtable));
+
        bucket->next = ino_dev_hashtable[i];
        ino_dev_hashtable[i] = bucket;
 }
 
+#if ENABLE_DU || ENABLE_FEATURE_CLEAN_UP
 /* Clear statbuf hash table */
-void reset_ino_dev_hashtable(void)
+void FAST_FUNC reset_ino_dev_hashtable(void)
 {
        int i;
        ino_dev_hashtable_bucket_t *bucket;
 
-       for (i = 0; i < HASH_SIZE; i++) {
+       for (i = 0; ino_dev_hashtable && i < HASH_SIZE; i++) {
                while (ino_dev_hashtable[i] != NULL) {
                        bucket = ino_dev_hashtable[i]->next;
                        free(ino_dev_hashtable[i]);
                        ino_dev_hashtable[i] = bucket;
                }
        }
+       free(ino_dev_hashtable);
+       ino_dev_hashtable = NULL;
 }
-
-
-/* END CODE */
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
+#endif