Adding upstream version 3.5.24.upstream/3.5.24

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

1 files changed, 330 insertions, 0 deletions

diff --git a/src/global/been_here.c b/src/global/been_here.c
new file mode 100644
index 0000000..8147829
--- /dev/null
+++ b/src/global/been_here.c
@@ -0,0 +1,330 @@
+/*++
+/* NAME
+/*	been_here 3
+/* SUMMARY
+/*	detect repeated occurrence of string
+/* SYNOPSIS
+/*	#include <been_here.h>
+/*
+/*	BH_TABLE *been_here_init(size, flags)
+/*	int	size;
+/*	int	flags;
+/*
+/*	int	been_here_fixed(dup_filter, string)
+/*	BH_TABLE *dup_filter;
+/*	char	*string;
+/*
+/*	int	been_here(dup_filter, format, ...)
+/*	BH_TABLE *dup_filter;
+/*	char	*format;
+/*
+/*	int	been_here_check_fixed(dup_filter, string)
+/*	BH_TABLE *dup_filter;
+/*	char	*string;
+/*
+/*	int	been_here_check(dup_filter, format, ...)
+/*	BH_TABLE *dup_filter;
+/*	char	*format;
+/*
+/*	int	been_here_drop_fixed(dup_filter, string)
+/*	BH_TABLE *dup_filter;
+/*	char	*string;
+/*
+/*	int	been_here_drop(dup_filter, format, ...)
+/*	BH_TABLE *dup_filter;
+/*	char	*format;
+/*
+/*	void	been_here_free(dup_filter)
+/*	BH_TABLE *dup_filter;
+/* DESCRIPTION
+/*	This module implements a simple filter to detect repeated
+/*	occurrences of character strings.
+/*
+/*	been_here_init() creates an empty duplicate filter.
+/*
+/*	been_here_fixed() looks up a fixed string in the given table, and
+/*	makes an entry in the table if the string was not found. The result
+/*	is non-zero (true) if the string was found, zero (false) otherwise.
+/*
+/*	been_here() formats its arguments, looks up the result in the
+/*	given table, and makes an entry in the table if the string was
+/*	not found. The result is non-zero (true) if the formatted result was
+/*	found, zero (false) otherwise.
+/*
+/*	been_here_check_fixed() and been_here_check() are similar
+/*	but do not update the duplicate filter.
+/*
+/*	been_here_drop_fixed() looks up a fixed string in the given
+/*	table, and deletes the entry if the string was found. The
+/*	result is non-zero (true) if the string was found, zero
+/*	(false) otherwise.
+/*
+/*	been_here_drop() formats its arguments, looks up the result
+/*	in the given table, and removes the entry if the formatted
+/*	result was found. The result is non-zero (true) if the
+/*	formatted result was found, zero (false) otherwise.
+/*
+/*	been_here_free() releases storage for a duplicate filter.
+/*
+/*	Arguments:
+/* .IP size
+/*	Upper bound on the table size; at most \fIsize\fR strings will
+/*	be remembered.  Specify BH_BOUND_NONE to disable the upper bound.
+/* .IP flags
+/*	Requests for special processing. Specify the bitwise OR of zero
+/*	or more flags:
+/* .RS
+/* .IP BH_FLAG_FOLD
+/*	Enable case-insensitive lookup.
+/* .IP BH_FLAG_NONE
+/*	A manifest constant that requests no special processing.
+/* .RE
+/* .IP dup_filter
+/*	The table with remembered names
+/* .IP string
+/*	Fixed search string.
+/* .IP format
+/*	Format for building the search string.
+/* 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
+/*--*/
+
+/* System library. */
+
+#include "sys_defs.h"
+#include <stdlib.h>			/* 44BSD stdarg.h uses abort() */
+#include <stdarg.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <mymalloc.h>
+#include <htable.h>
+#include <vstring.h>
+#include <stringops.h>
+
+/* Global library. */
+
+#include "been_here.h"
+
+#define STR(x)	vstring_str(x)
+
+/* been_here_init - initialize duplicate filter */
+
+BH_TABLE *been_here_init(int limit, int flags)
+{
+    BH_TABLE *dup_filter;
+
+    dup_filter = (BH_TABLE *) mymalloc(sizeof(*dup_filter));
+    dup_filter->limit = limit;
+    dup_filter->flags = flags;
+    dup_filter->table = htable_create(0);
+    return (dup_filter);
+}
+
+/* been_here_free - destroy duplicate filter */
+
+void    been_here_free(BH_TABLE *dup_filter)
+{
+    htable_free(dup_filter->table, (void (*) (void *)) 0);
+    myfree((void *) dup_filter);
+}
+
+/* been_here - duplicate detector with finer control */
+
+int     been_here(BH_TABLE *dup_filter, const char *fmt,...)
+{
+    VSTRING *buf = vstring_alloc(100);
+    int     status;
+    va_list ap;
+
+    /*
+     * Construct the string to be checked.
+     */
+    va_start(ap, fmt);
+    vstring_vsprintf(buf, fmt, ap);
+    va_end(ap);
+
+    /*
+     * Do the duplicate check.
+     */
+    status = been_here_fixed(dup_filter, vstring_str(buf));
+
+    /*
+     * Cleanup.
+     */
+    vstring_free(buf);
+    return (status);
+}
+
+/* been_here_fixed - duplicate detector */
+
+int     been_here_fixed(BH_TABLE *dup_filter, const char *string)
+{
+    VSTRING *folded_string;
+    const char *lookup_key;
+    int     status;
+
+    /*
+     * Special processing: case insensitive lookup.
+     */
+    if (dup_filter->flags & BH_FLAG_FOLD) {
+	folded_string = vstring_alloc(100);
+	lookup_key = casefold(folded_string, string);
+    } else {
+	folded_string = 0;
+	lookup_key = string;
+    }
+
+    /*
+     * Do the duplicate check.
+     */
+    if (htable_locate(dup_filter->table, lookup_key) != 0) {
+	status = 1;
+    } else {
+	if (dup_filter->limit <= 0
+	    || dup_filter->limit > dup_filter->table->used)
+	    htable_enter(dup_filter->table, lookup_key, (void *) 0);
+	status = 0;
+    }
+    if (msg_verbose)
+	msg_info("been_here: %s: %d", string, status);
+
+    /*
+     * Cleanup.
+     */
+    if (folded_string)
+	vstring_free(folded_string);
+
+    return (status);
+}
+
+/* been_here_check - query duplicate detector with finer control */
+
+int     been_here_check(BH_TABLE *dup_filter, const char *fmt,...)
+{
+    VSTRING *buf = vstring_alloc(100);
+    int     status;
+    va_list ap;
+
+    /*
+     * Construct the string to be checked.
+     */
+    va_start(ap, fmt);
+    vstring_vsprintf(buf, fmt, ap);
+    va_end(ap);
+
+    /*
+     * Do the duplicate check.
+     */
+    status = been_here_check_fixed(dup_filter, vstring_str(buf));
+
+    /*
+     * Cleanup.
+     */
+    vstring_free(buf);
+    return (status);
+}
+
+/* been_here_check_fixed - query duplicate detector */
+
+int     been_here_check_fixed(BH_TABLE *dup_filter, const char *string)
+{
+    VSTRING *folded_string;
+    const char *lookup_key;
+    int     status;
+
+    /*
+     * Special processing: case insensitive lookup.
+     */
+    if (dup_filter->flags & BH_FLAG_FOLD) {
+	folded_string = vstring_alloc(100);
+	lookup_key = casefold(folded_string, string);
+    } else {
+	folded_string = 0;
+	lookup_key = string;
+    }
+
+    /*
+     * Do the duplicate check.
+     */
+    status = (htable_locate(dup_filter->table, lookup_key) != 0);
+    if (msg_verbose)
+	msg_info("been_here_check: %s: %d", string, status);
+
+    /*
+     * Cleanup.
+     */
+    if (folded_string)
+	vstring_free(folded_string);
+
+    return (status);
+}
+
+/* been_here_drop - remove filter entry with finer control */
+
+int     been_here_drop(BH_TABLE *dup_filter, const char *fmt,...)
+{
+    VSTRING *buf = vstring_alloc(100);
+    int     status;
+    va_list ap;
+
+    /*
+     * Construct the string to be dropped.
+     */
+    va_start(ap, fmt);
+    vstring_vsprintf(buf, fmt, ap);
+    va_end(ap);
+
+    /*
+     * Drop the filter entry.
+     */
+    status = been_here_drop_fixed(dup_filter, vstring_str(buf));
+
+    /*
+     * Cleanup.
+     */
+    vstring_free(buf);
+    return (status);
+}
+
+/* been_here_drop_fixed - remove filter entry */
+
+int     been_here_drop_fixed(BH_TABLE *dup_filter, const char *string)
+{
+    VSTRING *folded_string;
+    const char *lookup_key;
+    int     status;
+
+    /*
+     * Special processing: case insensitive lookup.
+     */
+    if (dup_filter->flags & BH_FLAG_FOLD) {
+	folded_string = vstring_alloc(100);
+	lookup_key = casefold(folded_string, string);
+    } else {
+	folded_string = 0;
+	lookup_key = string;
+    }
+
+    /*
+     * Drop the filter entry.
+     */
+    if ((status = been_here_check_fixed(dup_filter, lookup_key)) != 0)
+	htable_delete(dup_filter->table, lookup_key, (void (*) (void *)) 0);
+
+    /*
+     * Cleanup.
+     */
+    if (folded_string)
+	vstring_free(folded_string);
+
+    return (status);
+}