Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 196 insertions, 0 deletions

diff --git a/src/util/dict_alloc.c b/src/util/dict_alloc.c
new file mode 100644
index 0000000..3285a38
--- /dev/null
+++ b/src/util/dict_alloc.c
@@ -0,0 +1,196 @@
+/*++
+/* NAME
+/*	dict_alloc 3
+/* SUMMARY
+/*	dictionary memory manager
+/* SYNOPSIS
+/*	#include <dict.h>
+/*
+/*	DICT	*dict_alloc(dict_type, dict_name, size)
+/*	const char *dict_type;
+/*	const char *dict_name;
+/*	ssize_t	size;
+/*
+/*	void	dict_free(dict)
+/*	DICT	*ptr;
+/*
+/*	void	dict_jmp_alloc(dict)
+/*	DICT	*ptr;
+/* DESCRIPTION
+/*	dict_alloc() allocates memory for a dictionary structure of
+/*	\fIsize\fR bytes, initializes all generic dictionary
+/*	properties to default settings,
+/*	and installs default methods that do not support any operation.
+/*	The caller is supposed to override the default methods with
+/*	ones that it supports.
+/*	The purpose of the default methods is to trap an attempt to
+/*	invoke an unsupported method.
+/*
+/*	One exception is the default lock function.  When the
+/*	dictionary provides a file handle for locking, the default
+/*	lock function returns the result from myflock with the
+/*	locking method specified in the lock_type member, otherwise
+/*	it returns 0. Presently, the lock function is used only to
+/*	implement the DICT_FLAG_OPEN_LOCK feature (lock the database
+/*	exclusively after it is opened) for databases that are not
+/*	multi-writer safe.
+/*
+/*	dict_free() releases memory and cleans up after dict_alloc().
+/*	It is up to the caller to dispose of any memory that was allocated
+/*	by the caller.
+/*
+/*	dict_jmp_alloc() implements preliminary support for exception
+/*	handling. This will eventually be built into dict_alloc().
+/*
+/*	Arguments:
+/* .IP dict_type
+/*	The official name for this type of dictionary, as used by
+/*	dict_open(3) etc. This is stored under the \fBtype\fR
+/*	member.
+/* .IP dict_name
+/*	Dictionary name. This is stored as the \fBname\fR member.
+/* .IP size
+/*	The size in bytes of the dictionary subclass structure instance.
+/* SEE ALSO
+/*	dict(3)
+/* DIAGNOSTICS
+/*	Fatal errors: the process invokes a default method.
+/* 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
+/*
+/*	Wietse Venema
+/*	Google, Inc.
+/*	111 8th Avenue
+/*	New York, NY 10011, USA
+/*--*/
+
+/* System libraries. */
+
+#include "sys_defs.h"
+
+/* Utility library. */
+
+#include "msg.h"
+#include "mymalloc.h"
+#include "myflock.h"
+#include "dict.h"
+
+/* dict_default_lookup - trap unimplemented operation */
+
+static const char *dict_default_lookup(DICT *dict, const char *unused_key)
+{
+    msg_fatal("table %s:%s: lookup operation is not supported",
+	      dict->type, dict->name);
+}
+
+/* dict_default_update - trap unimplemented operation */
+
+static int dict_default_update(DICT *dict, const char *unused_key,
+			               const char *unused_value)
+{
+    msg_fatal("table %s:%s: update operation is not supported",
+	      dict->type, dict->name);
+}
+
+/* dict_default_delete - trap unimplemented operation */
+
+static int dict_default_delete(DICT *dict, const char *unused_key)
+{
+    msg_fatal("table %s:%s: delete operation is not supported",
+	      dict->type, dict->name);
+}
+
+/* dict_default_sequence - trap unimplemented operation */
+
+static int dict_default_sequence(DICT *dict, int unused_function,
+		         const char **unused_key, const char **unused_value)
+{
+    msg_fatal("table %s:%s: sequence operation is not supported",
+	      dict->type, dict->name);
+}
+
+/* dict_default_lock - default lock handler */
+
+static int dict_default_lock(DICT *dict, int operation)
+{
+    if (dict->lock_fd >= 0) {
+	return (myflock(dict->lock_fd, dict->lock_type, operation));
+    } else {
+	return (0);
+    }
+}
+
+/* dict_default_close - trap unimplemented operation */
+
+static void dict_default_close(DICT *dict)
+{
+    msg_fatal("table %s:%s: close operation is not supported",
+	      dict->type, dict->name);
+}
+
+/* dict_alloc - allocate dictionary object, initialize super-class */
+
+DICT   *dict_alloc(const char *dict_type, const char *dict_name, ssize_t size)
+{
+    DICT   *dict = (DICT *) mymalloc(size);
+
+    dict->type = mystrdup(dict_type);
+    dict->name = mystrdup(dict_name);
+    dict->flags = DICT_FLAG_FIXED;
+    dict->lookup = dict_default_lookup;
+    dict->update = dict_default_update;
+    dict->delete = dict_default_delete;
+    dict->sequence = dict_default_sequence;
+    dict->close = dict_default_close;
+    dict->lock = dict_default_lock;
+    dict->lock_type = INTERNAL_LOCK;
+    dict->lock_fd = -1;
+    dict->stat_fd = -1;
+    dict->mtime = 0;
+    dict->fold_buf = 0;
+    dict->owner.status = DICT_OWNER_UNKNOWN;
+    dict->owner.uid = INT_MAX;
+    dict->error = DICT_ERR_NONE;
+    dict->jbuf = 0;
+    dict->utf8_backup = 0;
+    dict->file_buf = 0;
+    dict->file_b64 = 0;
+    return dict;
+}
+
+/* dict_free - super-class destructor */
+
+void    dict_free(DICT *dict)
+{
+    myfree(dict->type);
+    myfree(dict->name);
+    if (dict->jbuf)
+	myfree((void *) dict->jbuf);
+    if (dict->utf8_backup)
+	myfree((void *) dict->utf8_backup);
+    if (dict->file_buf)
+	vstring_free(dict->file_buf);
+    if (dict->file_b64)
+	vstring_free(dict->file_b64);
+    myfree((void *) dict);
+}
+
+ /*
+  * TODO: add a dict_flags() argument to dict_alloc() and handle jump buffer
+  * allocation there.
+  */
+
+/* dict_jmp_alloc - enable exception handling */
+
+void    dict_jmp_alloc(DICT *dict)
+{
+    if (dict->jbuf == 0)
+	dict->jbuf = (DICT_JMP_BUF *) mymalloc(sizeof(DICT_JMP_BUF));
+}