From f9f30807816700c44c30c7d04b80c65497f0558d Mon Sep 17 00:00:00 2001
From: Denis Kenzior <denkenz@gmail.com>
Date: Fri, 5 Jun 2009 17:56:11 -0500
Subject: [PATCH] Add utility for parsing MWI SMS DCS types

---
 src/smsutil.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 src/smsutil.h | 12 ++++++++++++
 2 files changed, 56 insertions(+)

diff --git a/src/smsutil.c b/src/smsutil.c
index ca301dd4..b381b8c0 100644
--- a/src/smsutil.c
+++ b/src/smsutil.c
@@ -172,6 +172,50 @@ gboolean sms_dcs_decode(guint8 dcs, enum sms_class *cls,
 	return TRUE;
 }
 
+gboolean sms_mwi_dcs_decode(guint8 dcs, enum sms_mwi_type *type,
+				enum sms_charset *charset,
+				gboolean *active, gboolean *discard)
+{
+	guint8 upper = (dcs & 0xf0) >> 4;
+	enum sms_mwi_type t;
+	enum sms_charset ch;
+	gboolean dis;
+	gboolean act;
+
+	if (upper < 0xC || upper > 0xE)
+		return FALSE;
+
+	upper = (dcs & 0x30) >> 4;
+
+	if (upper == 0)
+		dis = TRUE;
+	else
+		dis = FALSE;
+
+	if (upper == 3)
+		ch = SMS_CHARSET_UCS2;
+	else
+		ch = SMS_CHARSET_7BIT;
+
+	act = dcs & 0x8;
+
+	t = (enum sms_mwi_type) (dcs & 0x3);
+
+	if (type)
+		*type = t;
+
+	if (charset)
+		*charset = ch;
+
+	if (active)
+		*active = act;
+
+	if (discard)
+		*discard = dis;
+
+	return TRUE;
+}
+
 int sms_udl_in_bytes(guint8 ud_len, guint8 dcs)
 {
 	int len_7bit = (ud_len + 1) * 7 / 8;
diff --git a/src/smsutil.h b/src/smsutil.h
index b5f15c76..37dffb14 100644
--- a/src/smsutil.h
+++ b/src/smsutil.h
@@ -156,6 +156,13 @@ enum sms_charset {
 	SMS_CHARSET_UCS2 = 2,
 };
 
+enum sms_mwi_type {
+	SMS_MWI_TYPE_VOICE = 0,
+	SMS_MWI_TYPE_FAX = 1,
+	SMS_MWI_TYPE_EMAIL = 2,
+	SMS_MWI_TYPE_OTHER = 3,
+};
+
 struct sms_address {
 	enum sms_number_type number_type;
 	enum sms_numbering_plan numbering_plan;
@@ -317,4 +324,9 @@ gboolean sms_udh_iter_next(struct sms_udh_iter *iter);
 gboolean sms_dcs_decode(guint8 dcs, enum sms_class *cls,
 			enum sms_charset *charset,
 			gboolean *compressed, gboolean *autodelete);
+
+gboolean sms_mwi_dcs_decode(guint8 dcs, enum sms_mwi_type *type,
+				enum sms_charset *charset,
+				gboolean *active, gboolean *discard);
+
 #endif