1 files changed, 91 insertions, 0 deletions
diff --git a/src/util/name_code.c b/src/util/name_code.c
new file mode 100644
index 0000000..ca6d94a
--- /dev/null
+++ b/src/util/name_code.c
@@ -0,0 +1,91 @@
+/*++
+/* NAME
+/*	name_code 3
+/* SUMMARY
+/*	name to number table mapping
+/* SYNOPSIS
+/*	#include <name_code.h>
+/*
+/*	typedef struct {
+/* .in +4
+/*		const char *name;
+/*		int code;
+/* .in -4
+/*	} NAME_CODE;
+/*
+/*	int	name_code(table, flags, name)
+/*	const NAME_CODE *table;
+/*	int	flags;
+/*	const char *name;
+/*
+/*	const char *str_name_code(table, code)
+/*	const NAME_CODE *table;
+/*	int	code;
+/* DESCRIPTION
+/*	This module does simple name<->number mapping. The process
+/*	is controlled by a table of (name, code) values.
+/*	The table is terminated with a null pointer and a code that
+/*	corresponds to "name not found".
+/*
+/*	name_code() looks up the code that corresponds with the name.
+/*	The lookup is case insensitive. The flags argument specifies
+/*	zero or more of the following:
+/* .IP NAME_CODE_FLAG_STRICT_CASE
+/*	String lookups are case sensitive.
+/* .PP
+/*	For convenience the constant NAME_CODE_FLAG_NONE requests
+/*	no special processing.
+/*
+/*	str_name_code() translates a number to its equivalent string.
+/* DIAGNOSTICS
+/*	When the search fails, the result is the "name not found" code
+/*	or the null pointer, respectively.
+/* 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 <string.h>
+
+/* Utility library. */
+
+#include <name_code.h>
+
+/* name_code - look up code by name */
+
+int     name_code(const NAME_CODE *table, int flags, const char *name)
+{
+    const NAME_CODE *np;
+    int     (*lookup) (const char *, const char *);
+
+    if (flags & NAME_CODE_FLAG_STRICT_CASE)
+	lookup = strcmp;
+    else
+	lookup = strcasecmp;
+
+    for (np = table; np->name; np++)
+	if (lookup(name, np->name) == 0)
+	    break;
+    return (np->code);
+}
+
+/* str_name_code - look up name by code */
+
+const char *str_name_code(const NAME_CODE *table, int code)
+{
+    const NAME_CODE *np;
+
+    for (np = table; np->name; np++)
+	if (code == np->code)
+	    break;
+    return (np->name);
+}