From dd2de65b85cdc7a7744145214ecf8ea5ebe46c25 Mon Sep 17 00:00:00 2001
From: rimio <vasi.vilvoiu@gmail.com>
Date: Thu, 1 Mar 2018 21:24:07 +0200
Subject: Added endianness conversion; Added first 10 answer files; fixed test
 case; fixed small issue in describe tool

---
 src/ecbor.c          | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/ecbor_decoder.c  |  9 ++++++---
 src/ecbor_describe.c |  4 ++--
 src/ecbor_internal.h | 14 ++++++++++++++
 4 files changed, 73 insertions(+), 5 deletions(-)

(limited to 'src')

diff --git a/src/ecbor.c b/src/ecbor.c
index 9e8404f..dbbed96 100644
--- a/src/ecbor.c
+++ b/src/ecbor.c
@@ -6,6 +6,57 @@
  */
 
 #include "ecbor.h"
+#include "ecbor_internal.h"
+
+uint16_t
+ecbor_uint16_from_big_endian (uint16_t value)
+{
+#if __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+  return value;
+#elif __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+  /* TODO: ARM optimization */
+  return ((value << 8) & 0xff00)
+       | ((value >> 8) & 0x00ff);
+#else
+  #error "Endianness not supported!"
+#endif
+}
+
+uint32_t
+ecbor_uint32_from_big_endian (uint32_t value)
+{
+#if __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+  return value;
+#elif __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+  /* TODO: ARM optimization */
+  return ((value <<  8) & 0x00ff0000)
+       | ((value >>  8) & 0x0000ff00)
+       | ((value << 24) & 0xff000000)
+       | ((value >> 24) & 0x000000ff);
+#else
+  #error "Endianness not supported!"
+#endif
+}
+
+uint64_t
+ecbor_uint64_from_big_endian (uint64_t value)
+{
+#if __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+  return value;
+#elif __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+  /* TODO: ARM optimization */
+  return ((value <<  8) & 0x000000ff00000000)
+       | ((value >>  8) & 0x00000000ff000000)
+       | ((value << 24) & 0x0000ff0000000000)
+       | ((value >> 24) & 0x0000000000ff0000)
+       | ((value << 40) & 0x00ff000000000000)
+       | ((value >> 40) & 0x000000000000ff00)
+       | ((value << 56) & 0xff00000000000000)
+       | ((value >> 56) & 0x00000000000000ff);
+#else
+  #error "Endianness not supported!"
+#endif
+}
 
 extern ecbor_major_type_t
 ecbor_get_type (ecbor_item_t *item)
diff --git a/src/ecbor_decoder.c b/src/ecbor_decoder.c
index dfd3cad..d9cea78 100644
--- a/src/ecbor_decoder.c
+++ b/src/ecbor_decoder.c
@@ -116,15 +116,18 @@ ecbor_decode_uint (ecbor_decode_context_t *context,
         break;
 
       case ECBOR_ADDITIONAL_2BYTE:
-        (*value) = *((uint16_t *) context->in_position);
+        (*value) =
+          ecbor_uint16_from_big_endian (*((uint16_t *) context->in_position));
         break;
 
       case ECBOR_ADDITIONAL_4BYTE:
-        (*value) = *((uint32_t *) context->in_position);
+        (*value) =
+          ecbor_uint32_from_big_endian (*((uint32_t *) context->in_position));
         break;
 
       case ECBOR_ADDITIONAL_8BYTE:
-        (*value) = *((uint64_t *) context->in_position);
+        (*value) =
+          ecbor_uint64_from_big_endian (*((uint64_t *) context->in_position));
         break;
 
       default:
diff --git a/src/ecbor_describe.c b/src/ecbor_describe.c
index 1f5dd5a..de1025c 100644
--- a/src/ecbor_describe.c
+++ b/src/ecbor_describe.c
@@ -67,7 +67,7 @@ print_ecbor_item (ecbor_item_t *item, unsigned int level, char *prefix)
           return rc;
         }
         
-        printf ("[NINT] value %d\n", (int)val);
+        printf ("[NINT] value %lld\n", (long long int)val);
       }
       break;
 
@@ -80,7 +80,7 @@ print_ecbor_item (ecbor_item_t *item, unsigned int level, char *prefix)
           return rc;
         }
         
-        printf ("[UINT] value %u\n", (unsigned int) val);
+        printf ("[UINT] value %llu\n", (unsigned long long int) val);
       }
       break;
     
diff --git a/src/ecbor_internal.h b/src/ecbor_internal.h
index f0ec24b..b783eb1 100644
--- a/src/ecbor_internal.h
+++ b/src/ecbor_internal.h
@@ -8,6 +8,8 @@
 #ifndef _ECBOR_INTERNAL_H_
 #define _ECBOR_INTERNAL_H_
 
+#include <stdint.h>
+
 /* Don't rely on <stddef.h> for this */
 #define NULL 0
 #define false 0
@@ -23,4 +25,16 @@ enum {
   ECBOR_ADDITIONAL_INDEFINITE         = 31
 };
 
+/*
+ * Endianness
+ */
+extern uint16_t
+ecbor_uint16_from_big_endian (uint16_t value);
+
+extern uint32_t
+ecbor_uint32_from_big_endian (uint32_t value);
+
+extern uint64_t
+ecbor_uint64_from_big_endian (uint64_t value);
+
 #endif
\ No newline at end of file
-- 
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