Re: operator overloading syntax question

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Article #58

#58

From: Roman Fietze
Date: Tue, 10 Apr 2001 06:36

66 lines
2350 bytes

Hello,

God_Of_Pain <silicontao_roy@technologist.com> writes:

> ...
> Any help would be great.
> ...

I would say that is somewhat overkill. First of all I would store the
port bits in one BYTE variable (typedef unsigned char BYTE; class
TPortMap ... private: BYTE PortBits; ...) inside your class. Setting
single bits could probably be done like this:

void TPortMap::SetBits(BYTE bits)
{
	PortBits |= bits;
	WritePortBits();
}

void TPortMap::SetBit(unsigned short i)
{
	PortBits |= (1U << i);
	WritePortBits();
}

Querying could be done like

BYTE TPortMap::GetBits() const
{
	return (PortBits);
}

bool TPortMap::GetBit(unsigned short i) const
{
	return (PortBits & (1U << i));
}

and you operators could be something like

bool operator[] (unsigned short i) const
{
	return (GetBit(i));
}

void operator= (BYTE bits)
{
	SetBits(bits);
}

What would be nice is something like

MyPort[5] = true;

but that's not doable this way.

Roman

-- 
Roman Fietze (Mail Code 6)     roman.fietze@de.heidelberg.com
Heidelberg Digital Finishing GmbH, Germany     DDF-T SWEC ESW

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From: Roman Fietze <fietze@kagcpd05.muh.de.heidelberg.com>
Newsgroups: att.lang.c++,comp.lang.c++,comp.os.linux.embedded
Subject: Re: operator overloading syntax question
Date: 10 Apr 2001 08:36:57 +0200
Organization: Heidelberg Digital Finishing GmbH
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