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Merge pull request #178 

b032619 Commented most of src/serialization/ going to read up more on variant's and finish off the job/add last touchs next (jebes)
This commit is contained in:
Riccardo Spagni 2014-10-15 12:15:35 +02:00
parent db5ca73fdd b032619a9c
commit 2de2c52c02
No known key found for this signature in database
GPG Key ID: 55432DF31CCD4FCD
5 changed files with 315 additions and 97 deletions
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58
src/serialization/binary_archive.h
View File

@ -28,7 +28,7 @@
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
/* binary_archive.h
/*! \file binary_archive.h
*
* Portable (low-endian) binary archive */
#pragma once
@ -41,11 +41,20 @@
#include "common/varint.h"
#include "warnings.h"
PUSH_WARNINGS
DISABLE_VS_WARNINGS(4244)
/* I have no clue what these lines means */
PUSH_WARNINGS;
DISABLE_VS_WARNINGS(4244);
//TODO: fix size_t warning in x32 platform
/*! \struct binary_archive_base
*
* \brief base for the binary archive type
*
* \detailed It isn't used outside of this file, which its only
* purpse is to define the functions used for the binary_archive. Its
* a header, basically. I think it was declared simply to save typing...
*/
template <class Stream, bool IsSaving>
struct binary_archive_base
{
@ -57,22 +66,38 @@ struct binary_archive_base
explicit binary_archive_base(stream_type &s) : stream_(s) { }
/* definition of standard API functions */
void tag(const char *) { }
void begin_object() { }
void end_object() { }
void begin_variant() { }
void end_variant() { }
/* I just want to leave a comment saying how this line really shows
flaws in the ownership model of many OOP languages, that is all. */
stream_type &stream() { return stream_; }
protected:
stream_type &stream_;
};
/* \struct binary_archive
*
* \brief the actualy binary archive type
*
* \detailed The boolean template argument /a W is the is_saving
* parameter for binary_archive_base.
*
* The is_saving parameter says whether the archive is being read from
* (false) or written to (true)
*/
template <bool W>
struct binary_archive;
template <>
struct binary_archive<false> : public binary_archive_base<std::istream, false>
{
explicit binary_archive(stream_type &s) : base_type(s) {
stream_type::streampos pos = stream_.tellg();
stream_.seekg(0, std::ios_base::end);
@ -86,6 +111,10 @@ struct binary_archive<false> : public binary_archive_base<std::istream, false>
serialize_uint(*(typename boost::make_unsigned<T>::type *)&v);
}
/*! \fn serialize_uint
*
* \brief serializes an unsigned integer
*/
template <class T>
void serialize_uint(T &v, size_t width = sizeof(T))
{
@ -96,12 +125,16 @@ struct binary_archive<false> : public binary_archive_base<std::istream, false>
char c;
stream_.get(c);
T b = (unsigned char)c;
ret += (b << shift);
ret += (b << shift); // can this be changed to OR, i think it can.
shift += 8;
}
v = ret;
}
void serialize_blob(void *buf, size_t len, const char *delimiter="") { stream_.read((char *)buf, len); }
void serialize_blob(void *buf, size_t len, const char *delimiter="")
{
stream_.read((char *)buf, len);
}
template <class T>
void serialize_varint(T &v)
@ -115,17 +148,18 @@ struct binary_archive<false> : public binary_archive_base<std::istream, false>
typedef std::istreambuf_iterator<char> it;
tools::read_varint(it(stream_), it(), v); // XXX handle failure
}
void begin_array(size_t &s)
{
serialize_varint(s);
}
void begin_array() { }
void begin_array() { }
void delimit_array() { }
void end_array() { }
void begin_string(const char *delimiter="\"") { }
void end_string(const char *delimiter="\"") { }
void begin_string(const char *delimiter /*="\""*/) { }
void end_string(const char *delimiter /*="\""*/) { }
void read_variant_tag(variant_tag_type &t) {
serialize_int(t);
@ -157,12 +191,14 @@ struct binary_archive<true> : public binary_archive_base<std::ostream, true>
{
for (size_t i = 0; i < sizeof(T); i++) {
stream_.put((char)(v & 0xff));
if (1 < sizeof(T)) {
v >>= 8;
if (1 < sizeof(T)) v >>= 8;
}
}
void serialize_blob(void *buf, size_t len, const char *delimiter="")
{
stream_.write((char *)buf, len);
}
void serialize_blob(void *buf, size_t len, const char *delimiter="") { stream_.write((char *)buf, len); }
template <class T>
void serialize_varint(T &v)

23
src/serialization/binary_utils.h
View File

@ -34,23 +34,26 @@
#include "binary_archive.h"
namespace serialization {
template <class T>
bool parse_binary(const std::string &blob, T &v)
{
/*! creates a new archive with the passed blob and serializes it into v
*/
template <class T>
bool parse_binary(const std::string &blob, T &v)
{
std::istringstream istr(blob);
binary_archive<false> iar(istr);
return ::serialization::serialize(iar, v);
}
}
template<class T>
bool dump_binary(T& v, std::string& blob)
{
/*! dumps the data in v into the blob string
*/
template<class T>
bool dump_binary(T& v, std::string& blob)
{
std::stringstream ostr;
binary_archive<true> oar(ostr);
bool success = ::serialization::serialize(oar, v);
blob = ostr.str();
return success && ostr.good();
};
};
} // namespace serialization
}

21
src/serialization/json_archive.h
View File

@ -28,9 +28,10 @@
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
/* json_archive.h
/*! \file json_archive.h
*
* JSON archive */
* \brief JSON archive
*/
#pragma once
@ -39,6 +40,12 @@
#include <iostream>
#include <iomanip>
/*! \struct json_archive_base
*
* \brief the base class of json archive type
*
* \detailed contains the basic logic for serializing a json archive
*/
template <class Stream, bool IsSaving>
struct json_archive_base
{
@ -48,7 +55,8 @@ struct json_archive_base
typedef const char *variant_tag_type;
json_archive_base(stream_type &s, bool indent = false) : stream_(s), indent_(indent), object_begin(false), depth_(0) { }
json_archive_base(stream_type &s, bool indent = false)
: stream_(s), indent_(indent), object_begin(false), depth_(0) { }
void tag(const char *tag) {
if (!object_begin)
@ -92,6 +100,13 @@ protected:
size_t depth_;
};
/*! \struct json_archive
*
* \brief a archive using the JSON standard
*
* \detailed only supports being written to
*/
template <bool W>
struct json_archive;

193
src/serialization/serialization.h
View File

@ -1,5 +1,5 @@
// Copyright (c) 2014, The Monero Project
//
>//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
@ -28,9 +28,16 @@
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
/* serialization.h
/*! \file serialization.h
* \breif Simple DSL AAPI based on
*
* Simple templated serialization API */
* \detailed is_blob_type and has_free_serializer are
* both descriptors for dispatching on to the serailize function.
*
* The API itself defines a domain specific language via dirty macro
* hacks. Greenspun's tenth rule is very much in action throughout
* this entire code base.
*/
#pragma once
#include <vector>
@ -38,14 +45,35 @@
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/integral_constant.hpp>
/*! \struct is_blob_type
*
* \brief a descriptor for dispatching serialize
*/
template <class T>
struct is_blob_type { typedef boost::false_type type; };
/*! \struct has_free_serializer
*
* \brief a descriptor for dispatching serialize
*/
template <class T>
struct has_free_serializer { typedef boost::true_type type; };
/*! \struct serializer
*
* \brief ... wouldn't a class be better?
*
* \detailed The logic behind serializing data. Places the archive
* data into the supplied parameter. This dispatches based on the
* supplied \a T template parameter's traits of is_blob_type or it is
* an integral (as defined by the is_integral trait). Depends on the
* \a Archive parameter to have overloaded the serialize_blob(T v,
* size_t size) and serialize_int(T v) base on which trait it
* applied. When the class has neither types, it falls to the
* overloaded method do_serialize(Archive ar) in T to do the work.
*/
template <class Archive, class T>
struct serializer
{
struct serializer{
static bool serialize(Archive &ar, T &v) {
return serialize(ar, v, typename boost::is_integral<T>::type(), typename is_blob_type<T>::type());
}
@ -65,63 +93,151 @@ struct serializer
}
};
/*! \fn do_serialize(Archive &ar, T &v)
*
* \brief just calls the serialize function defined for ar and v...
*/
template <class Archive, class T>
inline bool do_serialize(Archive &ar, T &v)
{
return ::serializer<Archive, T>::serialize(ar, v);
}
#ifndef __GNUC__
#ifndef constexpr
#define constexpr
#endif
#endif
// Never used in the code base
// #ifndef __GNUC__
// #ifndef constexpr
// #define constexpr
// #endif
// #endif
/* the following add a trait to a set and define the serialization DSL*/
/*! \macro BLOB_SERIALIZER
*
* \brief makes the type have a blob serializer trait defined
*/
#define BLOB_SERIALIZER(T) \
template<> struct is_blob_type<T> { typedef boost::true_type type; }
template<> \
struct is_blob_type<T> { \
typedef boost::true_type type; \
}
/*! \macro FREE_SERIALIZER
*
* \brief adds the has_free_serializer to the type
*/
#define FREE_SERIALIZER(T) \
template<> struct has_free_serializer<T> { typedef boost::true_type type; }
#define VARIANT_TAG(A, T, Tg) \
template <bool W> struct variant_serialization_traits<A<W>, T> { static inline typename A<W>::variant_tag_type get_tag() { return Tg; } }
template<> \
struct has_free_serializer<T> { \
typedef boost::true_type type; \
}
/*! \macro VARIANT_TAG
*
* \brief Adds the tag \tag to the \a Archive of \a Type
*/
#define VARIANT_TAG(Archive, Type, Tag) \
template <bool W> \
struct variant_serialization_traits<Archive<W>, Type> { \
static inline typename Archive<W>::variant_tag_type get_tag() { \
return Tag; \
} \
}
/*! \macro BEGIN_SERIALIZE
*
* \brief Begins the environment of the DSL
* \detailed for describing how to
* serialize an of an archive type
*/
#define BEGIN_SERIALIZE() \
template <bool W, template <bool> class Archive> bool do_serialize(Archive<W> &ar) {
template <bool W, template <bool> class Archive> \
bool do_serialize(Archive<W> &ar) {
/*! \macro BEGIN_SERIALIZE_OBJECT
*
* \brief begins the environment of the DSL
* \detailed for described the serialization of an object
*/
#define BEGIN_SERIALIZE_OBJECT() \
template <bool W, template <bool> class Archive> bool do_serialize(Archive<W> &ar) { ar.begin_object(); bool r = do_serialize_object(ar); ar.end_object(); return r; } \
template <bool W, template <bool> class Archive> bool do_serialize_object(Archive<W> &ar){
#define PREPARE_CUSTOM_VECTOR_SERIALIZATION(size, vec) ::serialization::detail::prepare_custom_vector_serialization(size, vec, typename Archive<W>::is_saving())
template <bool W, template <bool> class Archive> \
bool do_serialize(Archive<W> &ar) { \
ar.begin_object(); \
bool r = do_serialize_object(ar); \
ar.end_object(); \
return r; \
} \
template <bool W, template <bool> class Archive> \
bool do_serialize_object(Archive<W> &ar){
#define END_SERIALIZE() return true;}
/*! \macro PREPARE_CUSTON_VECTOR_SERIALIZATION
*/
#define PREPARE_CUSTOM_VECTOR_SERIALIZATION(size, vec) \
::serialization::detail::prepare_custom_vector_serialization(size, vec, typename Archive<W>::is_saving())
/*! \macro END_SERIALIZE
* \brief self-explanatory
*/
#define END_SERIALIZE() \
return true; \
}
/*! \macro VALUE(f)
* \brief the same as FIELD(f)
*/
#define VALUE(f) \
do { \
ar.tag(#f); \
bool r = ::do_serialize(ar, f); \
if (!r || !ar.stream().good()) return false; \
} while(0);
/*! \macro FIELD_N(t,f)
*
* \brief serializes a field \a f tagged \a t
*/
#define FIELD_N(t, f) \
do { \
ar.tag(t); \
bool r = ::do_serialize(ar, f); \
if (!r || !ar.stream().good()) return false; \
} while(0);
#define FIELDS(f) \
do { \
bool r = ::do_serialize(ar, f); \
if (!r || !ar.stream().good()) return false; \
} while(0);
/*! \macro FIELD(f)
*
* \brief tags the field with the variable name and then serializes it
*/
#define FIELD(f) \
do { \
ar.tag(#f); \
bool r = ::do_serialize(ar, f); \
if (!r || !ar.stream().good()) return false; \
} while(0);
/*! \macro FIELDS(f)
*
* \brief does not add a tag to the serialized value
*/
#define FIELDS(f) \
do { \
bool r = ::do_serialize(ar, f); \
if (!r || !ar.stream().good()) return false; \
} while(0);
/*! \macro VARING_FIELD(f)
* \brief tags and serializes the varint \a f
*/
#define VARINT_FIELD(f) \
do { \
ar.tag(#f); \
ar.serialize_varint(f); \
if (!ar.stream().good()) return false; \
} while(0);
/*! \macro VARING_FIELD_N(t, f)
*
* \brief tags (as \a t) and serializes the varint \a f
*/
#define VARINT_FIELD_N(t, f) \
do { \
ar.tag(t); \
@ -129,9 +245,19 @@ inline bool do_serialize(Archive &ar, T &v)
if (!ar.stream().good()) return false; \
} while(0);
namespace serialization {
/*! \namespace detail
*
* \brief declaration and default definition for the functions used the API
*
*/
namespace detail
{
/*! \fn prepare_custom_vector_serialization
*
* prepares the vector /vec for serialization
*/
template <typename T>
void prepare_custom_vector_serialization(size_t size, std::vector<T>& vec, const boost::mpl::bool_<true>& /*is_saving*/)
{
@ -143,12 +269,21 @@ namespace serialization {
vec.resize(size);
}
/*! \fn do_check_stream_state
*
* \brief self explanatory
*/
template<class Stream>
bool do_check_stream_state(Stream& s, boost::mpl::bool_<true>)
{
return s.good();
}
/*! \fn do_check_stream_state
*
* \brief self explanatory
*
* \detailed Also checks to make sure that the stream is not at EOF
*/
template<class Stream>
bool do_check_stream_state(Stream& s, boost::mpl::bool_<false>)
{
@ -163,12 +298,20 @@ namespace serialization {
}
}
/*! \fn check_stream_state
*
* \brief calls detail::do_check_stream_state for ar
*/
template<class Archive>
bool check_stream_state(Archive& ar)
{
return detail::do_check_stream_state(ar.stream(), typename Archive::is_saving());
}
/*! \fn serialize
*
* \brief serializes \a v into \a ar
*/
template <class Archive, class T>
inline bool serialize(Archive &ar, T &v)
{

27
src/serialization/variant.h
View File

@ -28,6 +28,12 @@
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
/*! \file variant.h
*
* \brief for dealing with variants
*
* \detailed Variant: OOP Union
*/
#pragma once
#include <boost/variant/variant.hpp>
@ -39,11 +45,21 @@
#include <boost/mpl/pop_front.hpp>
#include "serialization.h"
/*! \struct variant_serialization_triats
*
* \brief used internally to contain a variant's traits/possible types
*
* \detailed see the macro VARIANT_TAG in serialization.h:140
*/
template <class Archive, class T>
struct variant_serialization_traits
{
};
/*! \struct variant_reader
*
* \brief reads a variant
*/
template <class Archive, class Variant, class TBegin, class TEnd>
struct variant_reader
{
@ -51,9 +67,10 @@ struct variant_reader
typedef typename boost::mpl::next<TBegin>::type TNext;
typedef typename boost::mpl::deref<TBegin>::type current_type;
// A tail recursive inline function.... okay...
static inline bool read(Archive &ar, Variant &v, variant_tag_type t)
{
if (variant_serialization_traits<Archive, current_type>::get_tag() == t) {
if(variant_serialization_traits<Archive, current_type>::get_tag() == t) {
current_type x;
if(!::do_serialize(ar, x))
{
@ -62,12 +79,15 @@ struct variant_reader
}
v = x;
} else {
// Tail recursive.... but no mutation is going on. Why?
return variant_reader<Archive, Variant, TNext, TEnd>::read(ar, v, t);
}
return true;
}
};
// This one just fails when you call it.... okay
// So the TEnd parameter must be specified/differnt from TBegin
template <class Archive, class Variant, class TBegin>
struct variant_reader<Archive, Variant, TBegin, TBegin>
{
@ -78,7 +98,6 @@ struct variant_reader<Archive, Variant, TBegin, TBegin>
ar.stream().setstate(std::ios::failbit);
return false;
}
};
@ -93,7 +112,9 @@ struct serializer<Archive<false>, boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>>
variant_tag_type t;
ar.begin_variant();
ar.read_variant_tag(t);
if(!variant_reader<Archive<false>, variant_type, typename boost::mpl::begin<types>::type, typename boost::mpl::end<types>::type>::read(ar, v, t))
if(!variant_reader<Archive<false>, variant_type,
typename boost::mpl::begin<types>::type,
typename boost::mpl::end<types>::type>::read(ar, v, t))
{
ar.stream().setstate(std::ios::failbit);
return false;