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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:46:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:46:30 +0000 |
| commit | b5896ba9f6047e7031e2bdee0622d543e11a6734 (patch) | |
| tree | fd7b460593a2fee1be579bec5697e6d887ea3421 /src/util/htable.h | |
| parent | Initial commit. (diff) | |
| download | postfix-upstream/3.4.23.tar.xz postfix-upstream/3.4.23.zip | |
Adding upstream version 3.4.23.upstream/3.4.23upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
| -rw-r--r-- | src/util/htable.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/util/htable.h b/src/util/htable.h new file mode 100644 index 0000000..bba43e8 --- /dev/null +++ b/src/util/htable.h @@ -0,0 +1,70 @@ +#ifndef _HTABLE_H_INCLUDED_ +#define _HTABLE_H_INCLUDED_ + +/*++ +/* NAME +/* htable 3h +/* SUMMARY +/* hash table manager +/* SYNOPSIS +/* #include <htable.h> +/* DESCRIPTION +/* .nf + + /* Structure of one hash table entry. */ + +typedef struct HTABLE_INFO { + char *key; /* lookup key */ + void *value; /* associated value */ + struct HTABLE_INFO *next; /* colliding entry */ + struct HTABLE_INFO *prev; /* colliding entry */ +} HTABLE_INFO; + + /* Structure of one hash table. */ + +typedef struct HTABLE { + ssize_t size; /* length of entries array */ + ssize_t used; /* number of entries in table */ + HTABLE_INFO **data; /* entries array, auto-resized */ + HTABLE_INFO **seq_bucket; /* current sequence hash bucket */ + HTABLE_INFO **seq_element; /* current sequence element */ +} HTABLE; + +extern HTABLE *htable_create(ssize_t); +extern HTABLE_INFO *htable_enter(HTABLE *, const char *, void *); +extern HTABLE_INFO *htable_locate(HTABLE *, const char *); +extern void *htable_find(HTABLE *, const char *); +extern void htable_delete(HTABLE *, const char *, void (*) (void *)); +extern void htable_free(HTABLE *, void (*) (void *)); +extern void htable_walk(HTABLE *, void (*) (HTABLE_INFO *, void *), void *); +extern HTABLE_INFO **htable_list(HTABLE *); +extern HTABLE_INFO *htable_sequence(HTABLE *, int); + +#define HTABLE_SEQ_FIRST 0 +#define HTABLE_SEQ_NEXT 1 +#define HTABLE_SEQ_STOP (-1) + + /* + * Correct only when casting (char *) to (void *). + */ +#define HTABLE_ACTION_FN_CAST(f) ((void *)(HTABLE_INFO *, void *)) (f) +#define HTABLE_FREE_FN_CAST(f) ((void *)(void *)) (f) + +/* LICENSE +/* .ad +/* .fi +/* The Secure Mailer license must be distributed with this software. +/* AUTHOR(S) +/* Wietse Venema +/* IBM T.J. Watson Research +/* P.O. Box 704 +/* Yorktown Heights, NY 10598, USA +/* CREATION DATE +/* Fri Feb 14 13:43:19 EST 1997 +/* LAST MODIFICATION +/* %E% %U% +/* VERSION/RELEASE +/* %I% +/*--*/ + +#endif |