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Copy pathjavaClass_serialisation.h
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Copy pathjavaClass_serialisation.h
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335 lines (302 loc) · 8.46 KB
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/*
@copyright Russell Standish 2000-2013
@author Russell Standish
This file is part of Classdesc
Open source licensed under the MIT license. See LICENSE for details.
*/
/**\file
\brief serialisation for javaClass
*/
#ifndef CLASSDESC_JAVACLASS_SERIALISATION_H
#define CLASSDESC_JAVACLASS_SERIALISATION_H
#include <vector>
#include <string>
#include <pack_base.h>
#include <dump_base.h>
#include "javaClass.h"
namespace classdesc
{
template <> void dump(dump_t& buf, const string& d, const u8& a)
{dump(buf,d,a.v);}
template <> void dump(dump_t& buf, const string& d, const u4& a)
{dump(buf,d,a.v);}
template <> void dump(dump_t& buf, const string& d, const u2& a)
{dump(buf,d,a.v);}
template <> void dump(dump_t& buf, const string& d, const u1& a)
{buf << std::hex << int(a);}
}
namespace classdesc_access
{
/*
Strings and vectors are have specialised serialisation for javaClass
*/
template <>
struct access_pack<std::string>
{
void operator()(classdesc::pack_t& buf, const classdesc::string& d, const std::string& a)
{
classdesc::u2 length=a.length();
pack(buf,d,length);
buf.packraw(a.c_str(),length);
}
};
template <>
struct access_unpack<std::string>
{
template <class U>
void operator()(classdesc::unpack_t& buf, const classdesc::string& d, U& a)
{
classdesc::u2 length;
unpack(buf,d,length);
char *s=new char[length];
buf.unpackraw(s,length);
a=std::string(s,length);
delete [] s;
}
};
template <>
struct access_unpack<classdesc::u8>
{
template <class U>
void operator()(classdesc::unpack_t& buf, const classdesc::string& d, U& a)
{
a.v=0;
for (int i=0; i<8; i++)
{
classdesc::u1 b;
unpack(buf,d,b);
a.v=(a.v<<8) | (0xFF&b);
}
}
};
template <>
struct access_pack<classdesc::u8>
{
template <class U>
void operator()(classdesc::pack_t& buf, const classdesc::string& d, U& a)
{
for (int i=7; i>=0; i--)
{
classdesc::u1 b = a.v >> 8*i;
pack(buf,d,b);
}
}
};
template <>
struct access_unpack<classdesc::u4>
{
template <class U>
void operator()(classdesc::unpack_t& buf, const classdesc::string& d, U& a)
{
a.v=0;
for (int i=0; i<4; i++)
{
classdesc::u1 b;
unpack(buf,d,b);
a.v=(a.v<<8) | (0xFF&b);
}
}
};
template <>
struct access_pack<classdesc::u4>
{
void operator()(classdesc::pack_t& buf, const classdesc::string& d, const classdesc::u4& a)
{
for (int i=3; i>=0; i--)
{
classdesc::u1 b = a.v >> 8*i;
pack(buf,d,b);
}
}
};
template <>
struct access_unpack<classdesc::u2>
{
void operator()(classdesc::unpack_t& buf, const classdesc::string& d, classdesc::u2& a)
{
classdesc::u1 b1, b2;
unpack(buf,d,b1);
unpack(buf,d,b2);
a=(b1<<8)| (0xFF & b2);
}
};
template <>
struct access_pack<classdesc::u2>
{
void operator()(classdesc::pack_t& buf, const classdesc::string& d, const classdesc::u2& a)
{
classdesc::u1 b1=a.v>>8, b2=a.v;
pack(buf,d,b1);
pack(buf,d,b2);
}
};
template <>
struct access_pack<classdesc::cp_info>
{
void operator()(classdesc::pack_t& buf, const classdesc::string& d, const classdesc::cp_info& a)
{
using namespace classdesc;
pack(buf,d,a.tag());
switch (a.tag())
{
case JVM_CONSTANT_Class:
case JVM_CONSTANT_String:
pack(buf,d,a.get<u2>()); break;
case JVM_CONSTANT_Fieldref:
case JVM_CONSTANT_Methodref:
case JVM_CONSTANT_InterfaceMethodref:
pack(buf,d,a.get<Ref>()); break;
case JVM_CONSTANT_Integer:
case JVM_CONSTANT_Float:
pack(buf,d,a.get<u4>()); break;
case JVM_CONSTANT_Long:
case JVM_CONSTANT_Double:
pack(buf,d,a.get<u8>()); break;
case JVM_CONSTANT_NameAndType:
pack(buf,d,a.get<NameAndTypeInfo>());
break;
case JVM_CONSTANT_Utf8:
pack(buf,d,a.get<std::string>()); break;
}
}
};
template <>
struct access_unpack<classdesc::cp_info>
{
void operator()(classdesc::unpack_t& buf, const classdesc::string& d, classdesc::cp_info& a)
{
using namespace classdesc;
u1 tag;
unpack(buf,d,tag);
switch (tag)
{
case JVM_CONSTANT_Class:
case JVM_CONSTANT_String:
a.unpack<u2>(buf,tag); break;
case JVM_CONSTANT_Fieldref:
case JVM_CONSTANT_Methodref:
case JVM_CONSTANT_InterfaceMethodref:
a.unpack<Ref>(buf,tag); break;
case JVM_CONSTANT_Integer:
case JVM_CONSTANT_Float:
a.unpack<u4>(buf,tag); break;
case JVM_CONSTANT_Long:
case JVM_CONSTANT_Double:
a.unpack<u8>(buf,tag); break;
case JVM_CONSTANT_NameAndType:
a.unpack<NameAndTypeInfo>(buf,tag);
break;
case JVM_CONSTANT_Utf8:
a.unpack<std::string>(buf,tag); break;
}
}
};
// The zeroth element is not serialised in the constant_pool
template <>
struct access_pack<classdesc::ConstantPoolVector>
{
template <class U>
void operator()(classdesc::pack_t& buf, const classdesc::string& d, U& a)
{
classdesc::u2 size=a.size();
pack(buf,d,size);
for (int i=1; i<size; i++)
pack(buf,d,a[i]);
}
};
// The zeroth element is not serialised in the constant_pool
template <>
struct access_unpack<classdesc::ConstantPoolVector>
{
void operator()(classdesc::pack_t& buf, const classdesc::string& d, std::vector<classdesc::cp_info>& a)
{
classdesc::u2 size; unpack(buf,d,size);
a.resize(size);
for (int i=1; i<size; i++)
unpack(buf,d,a[i]);
}
};
template <>
struct access_pack<classdesc::attribute_info>
{
template<class U>
void operator()(classdesc::pack_t& buf, const classdesc::string& d, U& a)
{
pack(buf,d,a.attribute_name_index);
classdesc::u4 length=a.info.size();
pack(buf,d,length);
// need to code this explicitly as attribute length is u4 not u2
for (size_t i=0; i<a.info.size(); i++)
pack(buf,d,a.info[i]);
}
};
template <>
struct access_unpack<classdesc::attribute_info>
{
void operator()(classdesc::pack_t& buf, const classdesc::string& d, classdesc::attribute_info& a)
{
unpack(buf,d,a.attribute_name_index);
classdesc::u4 length;
unpack(buf,d,length);
// need to code this explicitly as attribute length is u4 not u2
a.info.resize(length);
for (size_t i=0; i<a.info.size(); i++)
unpack(buf,d,a.info[i]);
}
};
}
/* define this here to take advantage of cp_info's serialisation operators */
inline bool classdesc::cp_info::operator==(const classdesc::cp_info& x) const
{
pack_t b1, b2;
pack(b1,string(),*this);
pack(b2,string(),x);
return b1.size()==b2.size() && memcmp(b1.data(),b2.data(),b1.size())==0;
}
namespace classdesc
{
void dumpp(dump_t& buf, const string& d, cp_info& a)
{
switch (a.tag())
{
case JVM_CONSTANT_Class:
case JVM_CONSTANT_String:
dump(buf,d,a.get<u2>()); break;
case JVM_CONSTANT_Fieldref:
case JVM_CONSTANT_Methodref:
case JVM_CONSTANT_InterfaceMethodref:
dump(buf,d,a.get<Ref>()); break;
case JVM_CONSTANT_Integer:
dump(buf,d,a.get<int>()); break;
case JVM_CONSTANT_Float:
dump(buf,d,a.get<float>()); break;
case JVM_CONSTANT_Long:
dump(buf,d,a.get<long long>()); break;
case JVM_CONSTANT_Double:
dump(buf,d,a.get<double>()); break;
case JVM_CONSTANT_NameAndType:
dump(buf,d,a.get<NameAndTypeInfo>());
break;
case JVM_CONSTANT_Utf8:
dump(buf,d,a.get<std::string>()); break;
}
}
}
namespace classdesc
{
inline void dumpp(dump_t& targ, const string& desc,struct attribute_info& arg)
{
dump(targ,desc+".attribute_name_index",arg.attribute_name_index);
int tab=format(targ, desc+".info");
targ << std::setw(tab) << "";
for (u1 *c=&arg.info[0]; c!=&arg.info[0]+arg.info.size(); c++)
targ << " "<<std::setw(2)<<std::setfill('0')<<std::hex << int(*c);
targ<<std::setfill(' ')<<std::endl;
}
}
template <class T> void classdesc::cp_info::unpack(pack_t& t, u1 tag) {
T tmp;
::unpack(t,"",tmp);
set(tag,tmp);
}
#endif
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