FunctionList Class Reference

A list of user defined functions. More...

#include <functionlist.h>

Collaboration diagram for FunctionList:

Public Member Functions
	FunctionList ()
	~FunctionList ()
void	Clear ()
bool	Delete (const char *name, const char *argument)
UserFunction *	GetFirstFunction () const
UserFunction *	GetFunctionDef (const char *name)
UserFunction *	GetFunctionDef (const char *name, const char *argument) const
FunctionNode *	GetFunctionCall (const char *function, ExpressionNode *value) const
char *	List () const
char *	ListDefinitions () const

Static Public Member Functions
static bool	IsSystemFunction (const char *name)

Private Member Functions
char *	ListContent (bool cmdFormat) const

Static Private Member Functions
static functiondef *	GetSystemFunction (const char *ident)
static char *	FindAlias (const char *ident)

Private Attributes
CharBuffer *	buf
UserFunction *	first

Detailed Description

A list of user defined functions.

Definition at line 42 of file functionlist.h.

Constructor & Destructor Documentation

FunctionList()

FunctionList::FunctionList

(

)

Definition at line 39 of file functionlist.cpp.

References buf, CharBuffer::CharBuffer(), and first.

Referenced by Program::Program().

{
    first = nullptr;
    buf = new CharBuffer();
}

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~FunctionList()

FunctionList::~FunctionList

(

)

Definition at line 45 of file functionlist.cpp.

References buf, and first.

{
    if (first != nullptr)
    {
        delete first;
    }

    delete buf;
}

Member Function Documentation

Clear()

void FunctionList::Clear

(

)

Definition at line 55 of file functionlist.cpp.

References buf, CharBuffer::ClearBuffer(), and first.

Referenced by DeleteStatement::Execute().

{
    if (first != nullptr)
    {
        delete first;
        first = nullptr;
    }

    buf->ClearBuffer();
}

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Delete()

bool FunctionList::Delete	(	const char *	name,
		const char *	argument
	)

Definition at line 66 of file functionlist.cpp.

References UserFunction::chainDelete, first, UserFunction::GetName(), Variable::GetName(), UserFunction::GetVariable(), UserFunction::Next, and StrIsEqual().

Referenced by DeleteStatement::Execute().

{
    if (first == nullptr)
    {
        return false;
    }

    if (first != nullptr && StrIsEqual(first->GetName(), name) && StrIsEqual(first->GetVariable()->GetName(), argument))
    {
        UserFunction* func = first;
        first = first->Next;
        func->chainDelete = false;
        delete func;
        return true;
    }

    UserFunction* current = first->Next;
    UserFunction* last = first;

    while (current != nullptr && !StrIsEqual(current->GetName(), name))
    {
        current = current->Next;
        last = last->Next;
    }

    if (current == nullptr)
    {
        return false;
    }
    else if (!StrIsEqual(current->GetVariable()->GetName(), argument))
    {
        return false;
    }

    last->Next = current->Next;

    // Only delete this variable. Not the whole chain.
    current->chainDelete = false;
    delete current;

    return true;
}

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FindAlias()

char * FunctionList::FindAlias ( const char *  ident )

staticprivate

Definition at line 258 of file functionlist.cpp.

References identalias::alias, identalias::ident, identaliases, and StrIsEqual().

Referenced by GetFunctionCall(), and GetSystemFunction().

{
    static const unsigned int count = sizeof(identaliases) / sizeof(identalias);
    for (unsigned int i = 0; i < count; i++)
    {
        if (StrIsEqual(identaliases[i].ident, ident))
        {
            return const_cast<char*>(identaliases[i].alias);
        }
    }

    return const_cast<char*>(ident);
}

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GetFirstFunction()

UserFunction * FunctionList::GetFirstFunction

(

)

const

Definition at line 109 of file functionlist.cpp.

References first.

{
    return first;
}

GetFunctionCall()

FunctionNode * FunctionList::GetFunctionCall	(	const char *	function,
		ExpressionNode *	value
	)		const

Definition at line 160 of file functionlist.cpp.

References functiondef::create, FindAlias(), first, UserFunction::GetName(), GetSystemFunction(), UserFunction::Next, StrIsEqual(), and UserFunctionNode::UserFunctionNode().

Referenced by Parser::ParseIdent().

{
    const functiondef* systemFunction = GetSystemFunction(function);
    if (systemFunction != nullptr)
    {
        char* sysname = FindAlias(function);
        return (systemFunction->create)(parameter, const_cast<char*>(function), sysname);
    }

    UserFunction* current = first;
    while (current != nullptr && !StrIsEqual(current->GetName(), function))
    {
        current = current->Next;
    }

    if (current != nullptr)
    {
        return new UserFunctionNode(current, parameter);
    }

    return nullptr;
}

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GetFunctionDef() [1/2]

UserFunction * FunctionList::GetFunctionDef

(

const char *

name

)

Definition at line 114 of file functionlist.cpp.

References first, UserFunction::GetName(), UserFunction::Next, StrIsEqual(), and UserFunction::UserFunction().

Referenced by Parser::ParseFunctionDef().

{
    // Search the list for function definition. If function not found then create a new definition.
    if (first == nullptr)
    {
        first = new UserFunction(name);
        return first;
    }

    UserFunction* current = first;
    UserFunction* last = nullptr;

    while (current != nullptr)
    {
        if (StrIsEqual(current->GetName(), name))
        {
            return current;
        }

        last = current;
        current = current->Next;
    }

    current = new UserFunction(name);
    last->Next = current;

    return current;
}

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GetFunctionDef() [2/2]

UserFunction * FunctionList::GetFunctionDef	(	const char *	name,
		const char *	argument
	)		const

Definition at line 143 of file functionlist.cpp.

References first, UserFunction::GetName(), Variable::GetName(), UserFunction::GetVariable(), UserFunction::Next, and StrIsEqual().

Referenced by PlotStatement::Execute().

{
    UserFunction* current = first;

    while (current != nullptr)
    {
        if (StrIsEqual(current->GetName(), name) && StrIsEqual(current->GetVariable()->GetName(), argument))
        {
            return current;
        }

        current = current->Next;
    }

    return nullptr;
}

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GetSystemFunction()

functiondef * FunctionList::GetSystemFunction ( const char *  ident )

staticprivate

Definition at line 243 of file functionlist.cpp.

References FindAlias(), functiondefs, functiondef::name, and StrIsEqual().

Referenced by GetFunctionCall(), and IsSystemFunction().

{
    char* s = FindAlias(ident);
    static const unsigned int count = sizeof(functiondefs) / sizeof(functiondef);
    for (unsigned int i = 0; i < count; i++)
    {
        if (StrIsEqual(functiondefs[i].name, s))
        {
            return const_cast<functiondef*>(&functiondefs[i]);
        }
    }

    return nullptr;
}

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IsSystemFunction()

bool FunctionList::IsSystemFunction ( const char *  name )

static

Definition at line 238 of file functionlist.cpp.

References GetSystemFunction().

Referenced by Parser::ParseFunctionDef().

{
    return (GetSystemFunction(name) != nullptr);
}

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List()

char * FunctionList::List

(

)

const

Definition at line 183 of file functionlist.cpp.

References ListContent().

Referenced by ListFunctionsStatement::Execute().

{
    return ListContent(false);
}

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ListContent()

char * FunctionList::ListContent ( bool  cmdFormat ) const

private

Definition at line 193 of file functionlist.cpp.

References CharBuffer::Append(), buf, CharBuffer::Empty(), CharBuffer::EnsureSize(), first, UserFunction::GetExpression(), UserFunction::GetName(), Variable::GetName(), CharBuffer::GetString(), ExpressionNode::GetText(), UserFunction::GetVariable(), UserFunction::Next, and StrLen().

Referenced by List(), and ListDefinitions().

{
    if (first == nullptr)
    {
        return static_cast<char*>(cmdFormat ? nullptr : HELPFUNCNDEF);
    }

    int len = 0;
    UserFunction* current = first;

    while (current != nullptr)
    {
        len += StrLen(current->GetName());
        len += 1;
        len += StrLen(current->GetVariable()->GetName());
        len += 2;
        len += StrLen(current->GetExpression()->GetText());
        len += cmdFormat ? 2 : 1;
        current = current->Next;
    }

    buf->Empty();
    buf->EnsureSize(len + StrLen(NEWLINE) + 1);

    current = first;
    while (current != nullptr)
    {
        buf->Append(current->GetName());
        buf->Append("(");
        buf->Append(current->GetVariable()->GetName());
        buf->Append(")=");
        buf->Append(current->GetExpression()->GetText());

        if (cmdFormat)
        {
            buf->Append(';');
        }

        buf->Append(NEWLINE);
        current = current->Next;
    }

    return buf->GetString();
}

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ListDefinitions()

char * FunctionList::ListDefinitions

(

)

const

Definition at line 188 of file functionlist.cpp.

References ListContent().

Referenced by SaveStatement::Execute().

{
    return ListContent(true);
}

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Member Data Documentation

buf

CharBuffer* FunctionList::buf

private

Definition at line 61 of file functionlist.h.

Referenced by Clear(), FunctionList(), ListContent(), and ~FunctionList().

first

UserFunction* FunctionList::first

private

Definition at line 62 of file functionlist.h.

Referenced by Clear(), Delete(), FunctionList(), GetFirstFunction(), GetFunctionCall(), GetFunctionDef(), ListContent(), and ~FunctionList().

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The documentation for this class was generated from the following files:

• src/main/functionlist.h
• src/main/functionlist.cpp