79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
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/*++
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/* NAME
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/* attr 3
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/* SUMMARY
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/* attribute list manager
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/* SYNOPSIS
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/* #include <htable.h>
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/* #include <attr.h>
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/*
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/* void attr_enter(attr, name, value)
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/* HTABLE *attr;
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/* const char *name;
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/* const char *value;
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/*
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/* const char *attr_find(attr, name)
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/* HTABLE *attr;
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/* const char *name;
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/*
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/* void attr_free(attr)
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/* HTABLE *attr;
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/* DESCRIPTION
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/* This module maintains open attribute lists of string-valued
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/* names and values. The module is built on top of the generic
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/* htable(3) hash table manager.
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/*
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/* attr_enter() adds a new attribute or updates an existing one.
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/* Both the name and the value are copied.
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/*
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/* attr_find() looks up the named attribute. It returns the
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/* corresponding value if one is found, a null pointer otherwise.
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/*
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/* attr_free() destroys the named attribute list and makes its
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/* memory available for reuse.
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/* BUGS
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/* This module cannot store null pointer values. If that is a
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/* problem, use the raw hash table management routines instead.
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/* LICENSE
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/* .ad
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/* .fi
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/* The Secure Mailer license must be distributed with this software.
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/* AUTHOR(S)
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/* Wietse Venema
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/* IBM T.J. Watson Research
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/* P.O. Box 704
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/* Yorktown Heights, NY 10598, USA
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/*--*/
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/* System library. */
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#include "sys_defs.h"
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/* Utility library. */
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#include "mymalloc.h"
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#include "htable.h"
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#include "attr.h"
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/* attr_enter - add or replace attribute */
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void attr_enter(HTABLE *attr, const char *name, const char *value)
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{
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HTABLE_INFO *ht;
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if ((ht = htable_locate(attr, name)) != 0) {/* replace attribute */
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myfree(ht->value);
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ht->value = mystrdup(value);
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} else { /* add attribute */
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(void) htable_enter(attr, name, mystrdup(value));
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}
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}
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/* attr_free - destroy attribute list */
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void attr_free(HTABLE *attr)
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{
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htable_free(attr, myfree);
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}
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