From 0a060e683659e718d0a5e8c85e132d3dd6877a9d Mon Sep 17 00:00:00 2001
From: winckel <winckel@eurecom.fr>
Date: Fri, 15 Nov 2013 10:59:51 +0000
Subject: [PATCH] Created an asn1 conversions file in common utils to perform
 conversion from ASN1 structure to integers.

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4412 818b1a75-f10b-46b9-bf7c-635c3b92a50f
---
 common/utils/Makefile.inc       |   3 +-
 common/utils/asn1_conversions.h | 121 ++++++++++++++++++++++++++++++++
 2 files changed, 123 insertions(+), 1 deletion(-)
 create mode 100644 common/utils/asn1_conversions.h

diff --git a/common/utils/Makefile.inc b/common/utils/Makefile.inc
index 021f1167c7..81b2c172a0 100644
--- a/common/utils/Makefile.inc
+++ b/common/utils/Makefile.inc
@@ -8,5 +8,6 @@ ITTI_OBJS += $(ITTI_DIR)/timer.o
 
 UTILS_OBJS = $(ITTI_OBJS)
 
-UTILS_incl = \
+UTILS_incl = 				\
+	-I$(COMMON_UTILS_DIR) 	\
     -I$(ITTI_DIR)
diff --git a/common/utils/asn1_conversions.h b/common/utils/asn1_conversions.h
new file mode 100644
index 0000000000..265957f601
--- /dev/null
+++ b/common/utils/asn1_conversions.h
@@ -0,0 +1,121 @@
+/*******************************************************************************
+
+  Eurecom OpenAirInterface 3
+  Copyright(c) 1999 - 2010 Eurecom
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+  more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program; if not, write to the Free Software Foundation, Inc.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Contact Information
+  Openair Admin: openair_admin@eurecom.fr
+  Openair Tech : openair_tech@eurecom.fr
+  Forums       : http://forums.eurecom.fsr/openairinterface
+  Address      : Eurecom, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France
+
+*******************************************************************************/
+
+#ifndef ASN1_CONVERSIONS_H_
+#define ASN1_CONVERSIONS_H_
+
+#include "BIT_STRING.h"
+#include "UTIL/assertions.h"
+
+//-----------------------begin func -------------------
+
+/*! \fn uint8_t BIT_STRING_to_uint8(BIT_STRING_t *)
+ *\brief  This function extract at most a 8 bits value from a BIT_STRING_t object, the exact bits number depend on the BIT_STRING_t contents.
+ *\param[in] pointer to the BIT_STRING_t object.
+ *\return the extracted value.
+ */
+inline uint8_t BIT_STRING_to_uint8(BIT_STRING_t *asn) {
+  DevCheck ((asn->size == 1), asn->size, 0, 0);
+
+  return asn->buf[0] >> asn->bits_unused;
+}
+
+/*! \fn uint16_t BIT_STRING_to_uint16(BIT_STRING_t *)
+ *\brief  This function extract at most a 16 bits value from a BIT_STRING_t object, the exact bits number depend on the BIT_STRING_t contents.
+ *\param[in] pointer to the BIT_STRING_t object.
+ *\return the extracted value.
+ */
+inline uint16_t BIT_STRING_to_uint16(BIT_STRING_t *asn) {
+  uint16_t result = 0;
+  int index = 0;
+
+  DevCheck ((asn->size > 0) && (asn->size <= 2), asn->size, 0, 0);
+
+  switch (asn->size) {
+    case 2:
+      result |= asn->buf[index++] << (8 - asn->bits_unused);
+
+    case 1:
+      result |= asn->buf[index] >> asn->bits_unused;
+      break;
+
+    default:
+      break;
+  }
+
+  return result;
+}
+
+/*! \fn uint32_t BIT_STRING_to_uint32(BIT_STRING_t *)
+ *\brief  This function extract at most a 32 bits value from a BIT_STRING_t object, the exact bits number depend on the BIT_STRING_t contents.
+ *\param[in] pointer to the BIT_STRING_t object.
+ *\return the extracted value.
+ */
+inline uint32_t BIT_STRING_to_uint32(BIT_STRING_t *asn) {
+  uint32_t result = 0;
+  int index;
+  int shift;
+
+  DevCheck ((asn->size > 0) && (asn->size <= 4), asn->size, 0, 0);
+
+  shift = ((asn->size - 1) * 8) - asn->bits_unused;
+  for (index = 0; index < (asn->size - 1); index++) {
+    result |= asn->buf[index] << shift;
+    shift -= 8;
+  }
+
+  result |= asn->buf[index] >> asn->bits_unused;
+
+  return result;
+}
+
+/*! \fn uint64_t BIT_STRING_to_uint64(BIT_STRING_t *)
+ *\brief  This function extract at most a 64 bits value from a BIT_STRING_t object, the exact bits number depend on the BIT_STRING_t contents.
+ *\param[in] pointer to the BIT_STRING_t object.
+ *\return the extracted value.
+ */
+inline uint64_t BIT_STRING_to_uint64(BIT_STRING_t *asn) {
+  uint64_t result = 0;
+  int index;
+  int shift;
+
+  DevCheck ((asn->size > 0) && (asn->size <= 8), asn->size, 0, 0);
+
+  shift = ((asn->size - 1) * 8) - asn->bits_unused;
+  for (index = 0; index < (asn->size - 1); index++) {
+    result |= asn->buf[index] << shift;
+    shift -= 8;
+  }
+
+  result |= asn->buf[index] >> asn->bits_unused;
+
+  return result;
+}
+
+#endif