Implement proto v2

2 files changed, 152 insertions, 0 deletions

diff --git a/src/ints/little.cpp b/src/ints/little.cpp
new file mode 100644
index 0000000..2f81954
--- /dev/null
+++ b/src/ints/little.cpp
@@ -0,0 +1,21 @@
+#include "little.hpp"
+//    little.cpp - integers of known endianness
+//
+//    Copyright © 2014 Ben Longbons <b.r.longbons@gmail.com>
+//
+//    This file is part of The Mana World (Athena server)
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
+
+#include "../poison.hpp"
diff --git a/src/ints/little.hpp b/src/ints/little.hpp
new file mode 100644
index 0000000..d7d57ff
--- /dev/null
+++ b/src/ints/little.hpp
@@ -0,0 +1,131 @@
+#ifndef TMWA_INTS_LITTLE_HPP
+#define TMWA_INTS_LITTLE_HPP
+//    little.hpp - integers of known endianness
+//
+//    Copyright © 2014 Ben Longbons <b.r.longbons@gmail.com>
+//
+//    This file is part of The Mana World (Athena server)
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
+
+# include "fwd.hpp"
+
+# include <endian.h>
+
+# include <cstdint>
+
+// We implement our own actual swapping, because glibc emits assembly
+// instead of letting the *compiler* do what it does best.
+# if __BYTE_ORDER != __BIG_ENDIAN && __BYTE_ORDER != __LITTLE_ENDIAN
+#  error "broken endians"
+# endif
+
+namespace ints
+{
+    // TODO hoist this to byte.hpp and also implement big.hpp
+    struct Byte
+    {
+        uint8_t value;
+    };
+
+    struct Little16
+    {
+        uint8_t data[2];
+    };
+
+    struct Little32
+    {
+        uint8_t data[4];
+    };
+
+    struct Little64
+    {
+        uint8_t data[8];
+    };
+
+    inline __attribute__((warn_unused_result))
+    bool native_to_network(Byte *net, uint8_t nat)
+    {
+        net->value = nat;
+        return true;
+    }
+    inline __attribute__((warn_unused_result))
+    bool native_to_network(Little16 *net, uint16_t nat)
+    {
+        if (__BYTE_ORDER == __BIG_ENDIAN)
+            nat = __builtin_bswap16(nat);
+        __builtin_memcpy(net, &nat, 2);
+        return true;
+    }
+    inline __attribute__((warn_unused_result))
+    bool native_to_network(Little32 *net, uint32_t nat)
+    {
+        if (__BYTE_ORDER == __BIG_ENDIAN)
+            nat = __builtin_bswap32(nat);
+        __builtin_memcpy(net, &nat, 2);
+        return true;
+    }
+    inline __attribute__((warn_unused_result))
+    bool native_to_network(Little64 *net, uint64_t nat)
+    {
+        if (__BYTE_ORDER == __BIG_ENDIAN)
+            nat = __builtin_bswap64(nat);
+        __builtin_memcpy(net, &nat, 2);
+        return true;
+    }
+
+    inline __attribute__((warn_unused_result))
+    bool network_to_native(uint8_t *nat, Byte net)
+    {
+        *nat = net.value;
+        return true;
+    }
+    inline __attribute__((warn_unused_result))
+    bool network_to_native(uint16_t *nat, Little16 net)
+    {
+        uint16_t tmp;
+        __builtin_memcpy(&tmp, &net, 2);
+        if (__BYTE_ORDER == __BIG_ENDIAN)
+            tmp = __builtin_bswap16(tmp);
+        *nat = tmp;
+        return true;
+    }
+    inline __attribute__((warn_unused_result))
+    bool network_to_native(uint32_t *nat, Little32 net)
+    {
+        uint32_t tmp;
+        __builtin_memcpy(&tmp, &net, 4);
+        if (__BYTE_ORDER == __BIG_ENDIAN)
+            tmp = __builtin_bswap32(tmp);
+        *nat = tmp;
+        return true;
+    }
+    inline __attribute__((warn_unused_result))
+    bool network_to_native(uint64_t *nat, Little64 net)
+    {
+        uint64_t tmp;
+        __builtin_memcpy(&tmp, &net, 8);
+        if (__BYTE_ORDER == __BIG_ENDIAN)
+            tmp = __builtin_bswap64(tmp);
+        *nat = tmp;
+        return true;
+    }
+} // namespace ints
+
+using ints::Byte;
+using ints::Little16;
+using ints::Little32;
+using ints::Little64;
+
+#endif // TMWA_INTS_LITTLE_HPP