cryptopp-cmake/algparam.h at master · 0Knowledge/cryptopp-cmake · GitHub

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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, size_t 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, size_t 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;}

size_t size() const {return m_deepCopy ? m_block.size() : m_size;}

private:

bool m_deepCopy;

const byte *m_data;

size_t 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;}

size_t size() const {return m_size;}

private:

byte *m_data;

size_t 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()

{

#ifndef __INTEL_COMPILER // ICL 9.1 workaround: Intel compiler copies the vTable pointer for some reason

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;

}

#endif

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);

}

// ********************************************************

// to allow the linker to discard Integer code if not needed.

typedef bool (CRYPTOPP_API * PAssignIntToInteger)(const std::type_info &valueType, void *pInteger, const void *pInt);

CRYPTOPP_DLL extern PAssignIntToInteger g_pAssignIntToInteger;

CRYPTOPP_DLL const std::type_info & CRYPTOPP_API IntegerTypeId();

class CRYPTOPP_DLL AlgorithmParametersBase

{

public:

class ParameterNotUsed : public Exception

{

public:

ParameterNotUsed(const char *name) : Exception(OTHER_ERROR, std::string("AlgorithmParametersBase: parameter \"") + name + "\" not used") {}

};

// this is actually a move, not a copy

AlgorithmParametersBase(const AlgorithmParametersBase &x)

: m_name(x.m_name), m_throwIfNotUsed(x.m_throwIfNotUsed), m_used(x.m_used)

{

m_next.reset(const_cast<AlgorithmParametersBase &>(x).m_next.release());

x.m_used = true;

}

AlgorithmParametersBase(const char *name, bool throwIfNotUsed)

: m_name(name), m_throwIfNotUsed(throwIfNotUsed), m_used(false) {}

virtual ~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:

friend class AlgorithmParameters;

void operator=(const AlgorithmParametersBase& rhs); // assignment not allowed, declare this for VC60

virtual void AssignValue(const char *name, const std::type_info &valueType, void *pValue) const =0;

virtual void MoveInto(void *p) const =0; // not really const

const char *m_name;

bool m_throwIfNotUsed;

mutable bool m_used;

member_ptr<AlgorithmParametersBase> m_next;

};

template <class T>

class AlgorithmParametersTemplate : public AlgorithmParametersBase

{

public:

AlgorithmParametersTemplate(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 (!(g_pAssignIntToInteger != NULL && typeid(T) == typeid(int) && g_pAssignIntToInteger(valueType, pValue, &m_value)))

{

NameValuePairs::ThrowIfTypeMismatch(name, typeid(T), valueType);

*reinterpret_cast<T *>(pValue) = m_value;

}

void MoveInto(void *buffer) const

{

AlgorithmParametersTemplate<T>* p = new(buffer) AlgorithmParametersTemplate<T>(*this);

}

protected:

T m_value;

};

CRYPTOPP_DLL_TEMPLATE_CLASS AlgorithmParametersTemplate<bool>;

CRYPTOPP_DLL_TEMPLATE_CLASS AlgorithmParametersTemplate<int>;

CRYPTOPP_DLL_TEMPLATE_CLASS AlgorithmParametersTemplate<ConstByteArrayParameter>;

class CRYPTOPP_DLL AlgorithmParameters : public NameValuePairs

{

public:

AlgorithmParameters();

#ifdef __BORLANDC__

template <class T>

AlgorithmParameters(const char *name, const T &value, bool throwIfNotUsed=true)

: m_next(new AlgorithmParametersTemplate<T>(name, value, throwIfNotUsed))

, m_defaultThrowIfNotUsed(throwIfNotUsed)

{

}

#endif

AlgorithmParameters(const AlgorithmParameters &x);

AlgorithmParameters & operator=(const AlgorithmParameters &x);

template <class T>

AlgorithmParameters & operator()(const char *name, const T &value, bool throwIfNotUsed)

{

member_ptr<AlgorithmParametersBase> p(new AlgorithmParametersTemplate<T>(name, value, throwIfNotUsed));

p->m_next.reset(m_next.release());

m_next.reset(p.release());

m_defaultThrowIfNotUsed = throwIfNotUsed;

return *this;

}

template <class T>

AlgorithmParameters & operator()(const char *name, const T &value)

{

return operator()(name, value, m_defaultThrowIfNotUsed);

}

bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;

protected:

member_ptr<AlgorithmParametersBase> m_next;

bool m_defaultThrowIfNotUsed;

};

//! 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:

AlgorithmParameters parameters = MakeParameters(name1, value1)(name2, value2)(name3, value3);

#ifdef __BORLANDC__

typedef AlgorithmParameters MakeParameters;

#else

template <class T>

AlgorithmParameters MakeParameters(const char *name, const T &value, bool throwIfNotUsed = true)

{

return AlgorithmParameters()(name, value, throwIfNotUsed);

}

#endif

#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

cryptopp-cmake/algparam.h at master · 0Knowledge/cryptopp-cmake · GitHub

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