storages: fix "portable" storage on big endian

contrib/epee/include/int-util.h

@@ -129,9 +129,12 @@ static inline uint32_t div128_32(uint64_t dividend_hi, uint64_t dividend_lo, uin
   return remainder;
 }
 
+#define IDENT16(x) ((uint16_t) (x))
 #define IDENT32(x) ((uint32_t) (x))
 #define IDENT64(x) ((uint64_t) (x))
 
+#define SWAP16(x) ((((uint16_t) (x) & 0x00ff) << 8) | \
+  (((uint16_t) (x) & 0xff00) >> 8))
 #define SWAP32(x) ((((uint32_t) (x) & 0x000000ff) << 24) | \
   (((uint32_t) (x) & 0x0000ff00) <<  8) | \
   (((uint32_t) (x) & 0x00ff0000) >>  8) | \
@@ -145,10 +148,18 @@ static inline uint32_t div128_32(uint64_t dividend_hi, uint64_t dividend_lo, uin
   (((uint64_t) (x) & 0x00ff000000000000) >> 40) | \
   (((uint64_t) (x) & 0xff00000000000000) >> 56))
 
+static inline uint16_t ident16(uint16_t x) { return x; }
 static inline uint32_t ident32(uint32_t x) { return x; }
 static inline uint64_t ident64(uint64_t x) { return x; }
 
 #ifndef __OpenBSD__
+#  if defined(__ANDROID__) && defined(__swap16) && !defined(swap16)
+#      define swap16 __swap16
+#  elif !defined(swap16)
+static inline uint16_t swap16(uint16_t x) {
+  return ((x & 0x00ff) << 8) | ((x & 0xff00) >> 8);
+}
+#  endif
 #  if defined(__ANDROID__) && defined(__swap32) && !defined(swap32)
 #      define swap32 __swap32
 #  elif !defined(swap32)
@@ -176,6 +187,12 @@ static inline uint64_t swap64(uint64_t x) {
 static inline void mem_inplace_ident(void *mem UNUSED, size_t n UNUSED) { }
 #undef UNUSED
 
+static inline void mem_inplace_swap16(void *mem, size_t n) {
+  size_t i;
+  for (i = 0; i < n; i++) {
+    ((uint16_t *) mem)[i] = swap16(((const uint16_t *) mem)[i]);
+  }
+}
 static inline void mem_inplace_swap32(void *mem, size_t n) {
   size_t i;
   for (i = 0; i < n; i++) {
@@ -189,6 +206,9 @@ static inline void mem_inplace_swap64(void *mem, size_t n) {
   }
 }
 
+static inline void memcpy_ident16(void *dst, const void *src, size_t n) {
+  memcpy(dst, src, 2 * n);
+}
 static inline void memcpy_ident32(void *dst, const void *src, size_t n) {
   memcpy(dst, src, 4 * n);
 }
@@ -196,6 +216,12 @@ static inline void memcpy_ident64(void *dst, const void *src, size_t n) {
   memcpy(dst, src, 8 * n);
 }
 
+static inline void memcpy_swap16(void *dst, const void *src, size_t n) {
+  size_t i;
+  for (i = 0; i < n; i++) {
+    ((uint16_t *) dst)[i] = swap16(((const uint16_t *) src)[i]);
+  }
+}
 static inline void memcpy_swap32(void *dst, const void *src, size_t n) {
   size_t i;
   for (i = 0; i < n; i++) {
@@ -220,6 +246,14 @@ static_assert(false, "BYTE_ORDER is undefined. Perhaps, GNU extensions are not e
 #endif
 
 #if BYTE_ORDER == LITTLE_ENDIAN
+#define SWAP16LE IDENT16
+#define SWAP16BE SWAP16
+#define swap16le ident16
+#define swap16be swap16
+#define mem_inplace_swap16le mem_inplace_ident
+#define mem_inplace_swap16be mem_inplace_swap16
+#define memcpy_swap16le memcpy_ident16
+#define memcpy_swap16be memcpy_swap16
 #define SWAP32LE IDENT32
 #define SWAP32BE SWAP32
 #define swap32le ident32
@@ -239,6 +273,14 @@ static_assert(false, "BYTE_ORDER is undefined. Perhaps, GNU extensions are not e
 #endif
 
 #if BYTE_ORDER == BIG_ENDIAN
+#define SWAP16BE IDENT16
+#define SWAP16LE SWAP16
+#define swap16be ident16
+#define swap16le swap16
+#define mem_inplace_swap16be mem_inplace_ident
+#define mem_inplace_swap16le mem_inplace_swap16
+#define memcpy_swap16be memcpy_ident16
+#define memcpy_swap16le memcpy_swap16
 #define SWAP32BE IDENT32
 #define SWAP32LE SWAP32
 #define swap32be ident32

contrib/epee/include/storages/portable_storage_bin_utils.h

@@ -0,0 +1,46 @@
+// Copyright (c) 2019, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#pragma once 
+
+#include "int-util.h"
+
+template<typename T> T convert_swapper(T t) { return t; }
+template<> inline uint16_t convert_swapper(uint16_t t) { return SWAP16LE(t); }
+template<> inline int16_t convert_swapper(int16_t t) { return SWAP16LE((uint16_t&)t); }
+template<> inline uint32_t convert_swapper(uint32_t t) { return SWAP32LE(t); }
+template<> inline int32_t convert_swapper(int32_t t) { return SWAP32LE((uint32_t&)t); }
+template<> inline uint64_t convert_swapper(uint64_t t) { return SWAP64LE(t); }
+template<> inline int64_t convert_swapper(int64_t t) { return SWAP64LE((uint64_t&)t); }
+template<> inline double convert_swapper(double t) { union { uint64_t u; double d; } u; u.d = t; u.u = SWAP64LE(u.u); return u.d; }
+
+#if BYTE_ORDER == BIG_ENDIAN
+#define CONVERT_POD(x) convert_swapper(x)
+#else
+#define CONVERT_POD(x) (x)
+#endif

contrib/epee/include/storages/portable_storage_from_bin.h

@@ -30,6 +30,7 @@
 
 #include "misc_language.h"
 #include "portable_storage_base.h"
+#include "portable_storage_bin_utils.h"
 
 #ifdef EPEE_PORTABLE_STORAGE_RECURSION_LIMIT
 #define EPEE_PORTABLE_STORAGE_RECURSION_LIMIT_INTERNAL EPEE_PORTABLE_STORAGE_RECURSION_LIMIT
@@ -117,6 +118,7 @@ namespace epee
       RECURSION_LIMITATION();
       static_assert(std::is_pod<t_pod_type>::value, "POD type expected");
       read(&pod_val, sizeof(pod_val));
+      pod_val = CONVERT_POD(pod_val);
     }
     
     template<class t_type>

contrib/epee/include/storages/portable_storage_to_bin.h

@@ -31,6 +31,7 @@
 #include "pragma_comp_defs.h"
 #include "misc_language.h"
 #include "portable_storage_base.h"
+#include "portable_storage_bin_utils.h"
 
 namespace epee
 {
@@ -42,6 +43,7 @@ namespace epee
     {
       pack_value v = pv << 2;
       v |= type_or;
+      v = CONVERT_POD(v);
       strm.write((const char*)&v, sizeof(pack_value));
       return sizeof(pack_value);
     }
@@ -93,8 +95,11 @@ namespace epee
         uint8_t type = contained_type|SERIALIZE_FLAG_ARRAY;
         m_strm.write((const char*)&type, 1);
         pack_varint(m_strm, arr_pod.m_array.size());
-        for(const t_pod_type& x: arr_pod.m_array)
+        for(t_pod_type x: arr_pod.m_array)
+        {
+          x = CONVERT_POD(x);
           m_strm.write((const char*)&x, sizeof(t_pod_type));
+        }
         return true;
       }
 
@@ -147,7 +152,8 @@ namespace epee
       bool pack_pod_type(uint8_t type, const pod_type& v)
       {
         m_strm.write((const char*)&type, 1);
-        m_strm.write((const char*)&v, sizeof(pod_type));
+        pod_type v0 = CONVERT_POD(v);
+        m_strm.write((const char*)&v0, sizeof(pod_type));
         return true;
       }
       //section, array_entry