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lang/c/msgpack: C++ binding: changed calback function of packer from Stream& append(const char*, size_t) to SomeType write(SomePointerType, SomeSizeType)

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git-svn-id: file:///Users/frsyuki/project/msgpack-git/svn/x@62 5a5092ae-2292-43ba-b2d5-dcab9c1a2731
This commit is contained in:
frsyuki
2009-02-15 09:09:57 +00:00
parent 4d13f614b6
commit a0a798d79e
5 changed files with 47 additions and 30 deletions
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47
cpp/pack.hpp
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@@ -73,7 +73,7 @@ private:
static void pack_string_impl(Stream& x, const char* b);
static void pack_raw_impl(Stream& x, const void* b, size_t l);
static void append_buffer(Stream& x, const unsigned char* buf, unsigned int len)
{ x.append((const char*)buf, len); }
{ x.write((const char*)buf, len); }
private:
Stream& m_stream;
@@ -100,14 +100,13 @@ public:
template <typename Stream>
dynamic_stream(Stream& s);
public:
dynamic_stream& append(const char* buf, size_t len)
{ (*m_function)(m_object, buf, len); return *this; }
void write(const char* buf, size_t len)
{ (*m_function)(m_object, buf, len); }
private:
void* m_object;
void (*m_function)(void* object, const char* buf, size_t len);
private:
template <typename Stream, Stream& (Stream::*MemFun)(const char*, size_t)>
static void append_trampoline(void* object, const char* buf, size_t len);
struct write_trampoline;
};
@@ -137,8 +136,6 @@ public:
void pack_string(const char* b) { pack_string_impl(m_stream, b); }
void pack_raw(const void* b, size_t l) { pack_raw_impl(m_stream, b, l); }
public:
private:
static void pack_int_impl(dynamic_stream& x, int d);
static void pack_unsigned_int_impl(dynamic_stream& x, unsigned int d);
@@ -160,7 +157,7 @@ private:
static void pack_string_impl(dynamic_stream& x, const char* b);
static void pack_raw_impl(dynamic_stream& x, const void* b, size_t l);
static void append_buffer(dynamic_stream& x, const unsigned char* buf, unsigned int len)
{ x.append((const char*)buf, len); }
{ x.write((const char*)buf, len); }
private:
dynamic_stream m_stream;
@@ -181,17 +178,37 @@ private:
template <typename Stream>
dynamic_packer::dynamic_packer(Stream& s) : m_stream(s) { }
struct dynamic_stream::write_trampoline {
private:
template <typename R>
struct ret_type {
typedef R (*type)(void*, const char*, size_t);
};
template <typename Stream, typename R,
typename Ptr, typename Sz, R (Stream::*MemFun)(Ptr*, Sz)>
static R trampoline(void* obj, const char* buf, size_t len)
{
return (reinterpret_cast<Stream*>(obj)->*MemFun)(buf, len);
}
public:
template <typename Stream, typename R, typename Ptr, typename Sz>
static typename ret_type<R>::type get(R (Stream::*func)(Ptr*, Sz))
{
R (*f)(void*, const char*, size_t) =
&trampoline<Stream, R, Ptr, Sz, &Stream::write>;
return f;
}
};
template <typename Stream>
dynamic_stream::dynamic_stream(Stream& s)
{
m_object = reinterpret_cast<void*>(&s);
m_function = &dynamic_stream::append_trampoline<Stream, &Stream::append>;
}
template <typename Stream, Stream& (Stream::*MemFun)(const char*, size_t)>
void dynamic_stream::append_trampoline(void* object, const char* buf, size_t len)
{
(reinterpret_cast<Stream*>(object)->*MemFun)(buf, len);
m_function = reinterpret_cast<void (*)(void*, const char*, size_t)>(
write_trampoline::get(&Stream::write)
);
}