Imported from ../bash-2.05b.tar.gz.

[platform/upstream/bash.git] / hashlib.h

diff --git a/hashlib.h b/hashlib.h
index 9c3dee0..bb7120b 100644 (file)
--- a/hashlib.h
+++ b/hashlib.h
@@ -23,10 +23,19 @@
 
 #include "stdc.h"
 
+#ifndef PTR_T
+#  ifdef __STDC__
+#    define PTR_T void *
+#  else
+#    define PTR_T char *
+#  endif
+#endif
+
 typedef struct bucket_contents {
   struct bucket_contents *next;        /* Link to next hashed key in this bucket. */
   char *key;                   /* What we look up. */
-  char *data;                  /* What we really want. */
+  PTR_T data;                  /* What we really want. */
+  unsigned int khash;          /* What key hashes to */
   int times_found;             /* Number of times this item has been found. */
 } BUCKET_CONTENTS;
 
@@ -36,27 +45,42 @@ typedef struct hash_table {
   int nentries;                        /* How many entries does this table have. */
 } HASH_TABLE;
 
-extern int hash_string __P((const char *, HASH_TABLE *));
-extern int hash_table_nentries __P((HASH_TABLE *));
-extern HASH_TABLE *make_hash_table __P((int));
-extern HASH_TABLE *copy_hash_table __P((HASH_TABLE *, sh_string_func_t *));
-extern BUCKET_CONTENTS *find_hash_item __P((const char *, HASH_TABLE *));
-extern BUCKET_CONTENTS *remove_hash_item __P((const char *, HASH_TABLE *));
-extern BUCKET_CONTENTS *add_hash_item __P((char *, HASH_TABLE *));
-extern void flush_hash_table __P((HASH_TABLE *, sh_free_func_t *));
-extern void dispose_hash_table __P((HASH_TABLE *));
+typedef int hash_wfunc __P((BUCKET_CONTENTS *));
+
+/* Operations on tables as a whole */
+extern HASH_TABLE *hash_create __P((int));
+extern HASH_TABLE *hash_copy __P((HASH_TABLE *, sh_string_func_t *));
+extern void hash_flush __P((HASH_TABLE *, sh_free_func_t *));
+extern void hash_dispose __P((HASH_TABLE *));
+extern void hash_walk __P((HASH_TABLE *, hash_wfunc *));
+
+/* Operations to extract information from or pieces of tables */
+extern int hash_bucket __P((const char *, HASH_TABLE *));
+extern int hash_size __P((HASH_TABLE *));
+
+/* Operations on hash table entries */
+extern BUCKET_CONTENTS *hash_search __P((const char *, HASH_TABLE *, int));
+extern BUCKET_CONTENTS *hash_insert __P((char *, HASH_TABLE *, int));
+extern BUCKET_CONTENTS *hash_remove __P((const char *, HASH_TABLE *, int));
+
+/* Miscellaneous */
+extern unsigned int hash_string __P((const char *));
 
 /* Redefine the function as a macro for speed. */
-#define get_hash_bucket(bucket, table) \
+#define hash_items(bucket, table) \
        ((table && (bucket < table->nbuckets)) ?  \
                table->bucket_array[bucket] : \
                (BUCKET_CONTENTS *)NULL)
 
 /* Default number of buckets in the hash table. */
-#define DEFAULT_HASH_BUCKETS 53        /* was 107 */
+#define DEFAULT_HASH_BUCKETS 64        /* was 107, then 53, must be power of two now */
 
 #define HASH_ENTRIES(ht)       ((ht) ? (ht)->nentries : 0)
 
+/* flags for hash_search and hash_insert */
+#define HASH_NOSRCH    0x01
+#define HASH_CREATE    0x02
+
 #if !defined (NULL)
 #  if defined (__STDC__)
 #    define NULL ((void *) 0)