?? algparam.h
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#ifndef CRYPTOPP_ALGPARAM_H
#define CRYPTOPP_ALGPARAM_H
#include "cryptlib.h"
#include "smartptr.h"
#include "secblock.h"
NAMESPACE_BEGIN(CryptoPP)
//! used to pass byte array input as part of a NameValuePairs object
/*! the deepCopy option is used when the NameValuePairs object can't
keep a copy of the data available */
class ConstByteArrayParameter
{
public:
ConstByteArrayParameter(const char *data = NULL, bool deepCopy = false)
{
Assign((const byte *)data, data ? strlen(data) : 0, deepCopy);
}
ConstByteArrayParameter(const byte *data, unsigned int size, bool deepCopy = false)
{
Assign(data, size, deepCopy);
}
template <class T> ConstByteArrayParameter(const T &string, bool deepCopy = false)
{
CRYPTOPP_COMPILE_ASSERT(sizeof(CPP_TYPENAME T::value_type) == 1);
Assign((const byte *)string.data(), string.size(), deepCopy);
}
void Assign(const byte *data, unsigned int size, bool deepCopy)
{
if (deepCopy)
m_block.Assign(data, size);
else
{
m_data = data;
m_size = size;
}
m_deepCopy = deepCopy;
}
const byte *begin() const {return m_deepCopy ? m_block.begin() : m_data;}
const byte *end() const {return m_deepCopy ? m_block.end() : m_data + m_size;}
unsigned int size() const {return m_deepCopy ? m_block.size() : m_size;}
private:
bool m_deepCopy;
const byte *m_data;
unsigned int m_size;
SecByteBlock m_block;
};
class ByteArrayParameter
{
public:
ByteArrayParameter(byte *data = NULL, unsigned int size = 0)
: m_data(data), m_size(size) {}
ByteArrayParameter(SecByteBlock &block)
: m_data(block.begin()), m_size(block.size()) {}
byte *begin() const {return m_data;}
byte *end() const {return m_data + m_size;}
unsigned int size() const {return m_size;}
private:
byte *m_data;
unsigned int m_size;
};
class CRYPTOPP_DLL CombinedNameValuePairs : public NameValuePairs
{
public:
CombinedNameValuePairs(const NameValuePairs &pairs1, const NameValuePairs &pairs2)
: m_pairs1(pairs1), m_pairs2(pairs2) {}
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
private:
const NameValuePairs &m_pairs1, &m_pairs2;
};
template <class T, class BASE>
class GetValueHelperClass
{
public:
GetValueHelperClass(const T *pObject, const char *name, const std::type_info &valueType, void *pValue, const NameValuePairs *searchFirst)
: m_pObject(pObject), m_name(name), m_valueType(&valueType), m_pValue(pValue), m_found(false), m_getValueNames(false)
{
if (strcmp(m_name, "ValueNames") == 0)
{
m_found = m_getValueNames = true;
NameValuePairs::ThrowIfTypeMismatch(m_name, typeid(std::string), *m_valueType);
if (searchFirst)
searchFirst->GetVoidValue(m_name, valueType, pValue);
if (typeid(T) != typeid(BASE))
pObject->BASE::GetVoidValue(m_name, valueType, pValue);
((*reinterpret_cast<std::string *>(m_pValue) += "ThisPointer:") += typeid(T).name()) += ';';
}
if (!m_found && strncmp(m_name, "ThisPointer:", 12) == 0 && strcmp(m_name+12, typeid(T).name()) == 0)
{
NameValuePairs::ThrowIfTypeMismatch(m_name, typeid(T *), *m_valueType);
*reinterpret_cast<const T **>(pValue) = pObject;
m_found = true;
return;
}
if (!m_found && searchFirst)
m_found = searchFirst->GetVoidValue(m_name, valueType, pValue);
if (!m_found && typeid(T) != typeid(BASE))
m_found = pObject->BASE::GetVoidValue(m_name, valueType, pValue);
}
operator bool() const {return m_found;}
template <class R>
GetValueHelperClass<T,BASE> & operator()(const char *name, const R & (T::*pm)() const)
{
if (m_getValueNames)
(*reinterpret_cast<std::string *>(m_pValue) += name) += ";";
if (!m_found && strcmp(name, m_name) == 0)
{
NameValuePairs::ThrowIfTypeMismatch(name, typeid(R), *m_valueType);
*reinterpret_cast<R *>(m_pValue) = (m_pObject->*pm)();
m_found = true;
}
return *this;
}
GetValueHelperClass<T,BASE> &Assignable()
{
if (m_getValueNames)
((*reinterpret_cast<std::string *>(m_pValue) += "ThisObject:") += typeid(T).name()) += ';';
if (!m_found && strncmp(m_name, "ThisObject:", 11) == 0 && strcmp(m_name+11, typeid(T).name()) == 0)
{
NameValuePairs::ThrowIfTypeMismatch(m_name, typeid(T), *m_valueType);
*reinterpret_cast<T *>(m_pValue) = *m_pObject;
m_found = true;
}
return *this;
}
private:
const T *m_pObject;
const char *m_name;
const std::type_info *m_valueType;
void *m_pValue;
bool m_found, m_getValueNames;
};
template <class BASE, class T>
GetValueHelperClass<T, BASE> GetValueHelper(const T *pObject, const char *name, const std::type_info &valueType, void *pValue, const NameValuePairs *searchFirst=NULL, BASE *dummy=NULL)
{
return GetValueHelperClass<T, BASE>(pObject, name, valueType, pValue, searchFirst);
}
template <class T>
GetValueHelperClass<T, T> GetValueHelper(const T *pObject, const char *name, const std::type_info &valueType, void *pValue, const NameValuePairs *searchFirst=NULL)
{
return GetValueHelperClass<T, T>(pObject, name, valueType, pValue, searchFirst);
}
// ********************************************************
template <class R>
R Hack_DefaultValueFromConstReferenceType(const R &)
{
return R();
}
template <class R>
bool Hack_GetValueIntoConstReference(const NameValuePairs &source, const char *name, const R &value)
{
return source.GetValue(name, const_cast<R &>(value));
}
template <class T, class BASE>
class AssignFromHelperClass
{
public:
AssignFromHelperClass(T *pObject, const NameValuePairs &source)
: m_pObject(pObject), m_source(source), m_done(false)
{
if (source.GetThisObject(*pObject))
m_done = true;
else if (typeid(BASE) != typeid(T))
pObject->BASE::AssignFrom(source);
}
template <class R>
AssignFromHelperClass & operator()(const char *name, void (T::*pm)(R)) // VC60 workaround: "const R &" here causes compiler error
{
if (!m_done)
{
R value = Hack_DefaultValueFromConstReferenceType(reinterpret_cast<R>(*(int *)NULL));
if (!Hack_GetValueIntoConstReference(m_source, name, value))
throw InvalidArgument(std::string(typeid(T).name()) + ": Missing required parameter '" + name + "'");
(m_pObject->*pm)(value);
}
return *this;
}
template <class R, class S>
AssignFromHelperClass & operator()(const char *name1, const char *name2, void (T::*pm)(R, S)) // VC60 workaround: "const R &" here causes compiler error
{
if (!m_done)
{
R value1 = Hack_DefaultValueFromConstReferenceType(reinterpret_cast<R>(*(int *)NULL));
if (!Hack_GetValueIntoConstReference(m_source, name1, value1))
throw InvalidArgument(std::string(typeid(T).name()) + ": Missing required parameter '" + name1 + "'");
S value2 = Hack_DefaultValueFromConstReferenceType(reinterpret_cast<S>(*(int *)NULL));
if (!Hack_GetValueIntoConstReference(m_source, name2, value2))
throw InvalidArgument(std::string(typeid(T).name()) + ": Missing required parameter '" + name2 + "'");
(m_pObject->*pm)(value1, value2);
}
return *this;
}
private:
T *m_pObject;
const NameValuePairs &m_source;
bool m_done;
};
template <class BASE, class T>
AssignFromHelperClass<T, BASE> AssignFromHelper(T *pObject, const NameValuePairs &source, BASE *dummy=NULL)
{
return AssignFromHelperClass<T, BASE>(pObject, source);
}
template <class T>
AssignFromHelperClass<T, T> AssignFromHelper(T *pObject, const NameValuePairs &source)
{
return AssignFromHelperClass<T, T>(pObject, source);
}
// ********************************************************
// This should allow the linker to discard Integer code if not needed.
CRYPTOPP_DLL extern bool (*AssignIntToInteger)(const std::type_info &valueType, void *pInteger, const void *pInt);
CRYPTOPP_DLL const std::type_info & IntegerTypeId();
class CRYPTOPP_DLL AlgorithmParametersBase : public NameValuePairs
{
public:
class ParameterNotUsed : public Exception
{
public:
ParameterNotUsed(const char *name) : Exception(OTHER_ERROR, std::string("AlgorithmParametersBase: parameter \"") + name + "\" not used") {}
};
AlgorithmParametersBase(const char *name, bool throwIfNotUsed)
: m_name(name), m_throwIfNotUsed(throwIfNotUsed), m_used(false) {}
~AlgorithmParametersBase()
{
#ifdef CRYPTOPP_UNCAUGHT_EXCEPTION_AVAILABLE
if (!std::uncaught_exception())
#else
try
#endif
{
if (m_throwIfNotUsed && !m_used)
throw ParameterNotUsed(m_name);
}
#ifndef CRYPTOPP_UNCAUGHT_EXCEPTION_AVAILABLE
catch(...)
{
}
#endif
}
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
protected:
virtual void AssignValue(const char *name, const std::type_info &valueType, void *pValue) const =0;
virtual const NameValuePairs & GetParent() const =0;
const char *m_name;
bool m_throwIfNotUsed;
mutable bool m_used;
};
template <class T>
class AlgorithmParametersBase2 : public AlgorithmParametersBase
{
public:
AlgorithmParametersBase2(const char *name, const T &value, bool throwIfNotUsed) : AlgorithmParametersBase(name, throwIfNotUsed), m_value(value) {}
void AssignValue(const char *name, const std::type_info &valueType, void *pValue) const
{
// special case for retrieving an Integer parameter when an int was passed in
if (!(AssignIntToInteger != NULL && typeid(T) == typeid(int) && AssignIntToInteger(valueType, pValue, &m_value)))
{
ThrowIfTypeMismatch(name, typeid(T), valueType);
*reinterpret_cast<T *>(pValue) = m_value;
}
}
protected:
T m_value;
};
template <class PARENT, class T>
class AlgorithmParameters : public AlgorithmParametersBase2<T>
{
public:
AlgorithmParameters(const PARENT &parent, const char *name, const T &value, bool throwIfNotUsed)
: AlgorithmParametersBase2<T>(name, value, throwIfNotUsed), m_parent(parent)
{}
AlgorithmParameters(const AlgorithmParameters ©)
: AlgorithmParametersBase2<T>(copy), m_parent(copy.m_parent)
{
copy.m_used = true;
}
template <class R>
AlgorithmParameters<AlgorithmParameters<PARENT,T>, R> operator()(const char *name, const R &value) const
{
return AlgorithmParameters<AlgorithmParameters<PARENT,T>, R>(*this, name, value, this->m_throwIfNotUsed);
}
template <class R>
AlgorithmParameters<AlgorithmParameters<PARENT,T>, R> operator()(const char *name, const R &value, bool throwIfNotUsed) const
{
return AlgorithmParameters<AlgorithmParameters<PARENT,T>, R>(*this, name, value, throwIfNotUsed);
}
private:
const NameValuePairs & GetParent() const {return m_parent;}
PARENT m_parent;
};
//! Create an object that implements NameValuePairs for passing parameters
/*! \param throwIfNotUsed if true, the object will throw an exception if the value is not accessed
\note throwIfNotUsed is ignored if using a compiler that does not support std::uncaught_exception(),
such as MSVC 7.0 and earlier.
\note A NameValuePairs object containing an arbitrary number of name value pairs may be constructed by
repeatedly using operator() on the object returned by MakeParameters, for example:
const NameValuePairs ¶meters = MakeParameters(name1, value1)(name2, value2)(name3, value3);
*/
template <class T>
AlgorithmParameters<NullNameValuePairs,T> MakeParameters(const char *name, const T &value, bool throwIfNotUsed = true)
{
return AlgorithmParameters<NullNameValuePairs,T>(g_nullNameValuePairs, name, value, throwIfNotUsed);
}
#define CRYPTOPP_GET_FUNCTION_ENTRY(name) (Name::name(), &ThisClass::Get##name)
#define CRYPTOPP_SET_FUNCTION_ENTRY(name) (Name::name(), &ThisClass::Set##name)
#define CRYPTOPP_SET_FUNCTION_ENTRY2(name1, name2) (Name::name1(), Name::name2(), &ThisClass::Set##name1##And##name2)
NAMESPACE_END
#endif
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