moved back to templated functors. everything is header only again

Author: me

src/msgpack.h include/msgpack.hsrc/msgpack.h renamed to include/msgpack.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#include <cstring>
+#include <vector>
+#include <ostream>
+#include <istream>
+#include "msgpack.h"
+
+namespace msgpackcpp
+{
+
+//----------------------------------------------------------------------------------------------------------------
+
+    template<class Byte, class Alloc, check_byte<Byte> = true>
+    auto sink(std::vector<Byte, Alloc>& buf)
+    {
+        return [&](const char* bytes, size_t nbytes) {
+            buf.insert(end(buf), bytes, bytes + nbytes);
+        };
+    } 
+
+    template<class Byte, class Alloc, check_byte<Byte> = true>
+    auto source(const std::vector<Byte, Alloc>& buf)
+    {
+        size_t offset{0};
+        return [&buf, offset](char* bytes, size_t nbytes) mutable {
+            if ((buf.size() - offset) < nbytes)
+                throw std::system_error(OUT_OF_DATA);
+            std::memcpy(bytes, buf.data() + offset, nbytes);
+            offset += nbytes;
+        };
+    } 
+
+//----------------------------------------------------------------------------------------------------------------
+
+    inline auto sink(std::ostream& out)
+    {
+        return [&](const char* bytes, size_t nbytes) {
+            out.write(bytes, nbytes);
+        };
+    }
+
+    inline auto source(std::istream& in)
+    {
+        return [&](char* bytes, size_t nbytes) {
+            in.read(bytes, nbytes);
+            if (in.gcount() != (long)nbytes)
+                throw std::system_error(OUT_OF_DATA);
+        };
+    }
+
+//----------------------------------------------------------------------------------------------------------------
+
+}