Please help: Translation syntax from C++ to PBWin

[norbert doerre]

I defined some structures in C++ for vector fonts.
Just to help You understand the coherences I'm adding the
whole bunch of definitions.
Only two of them including pointers seem to be difficult
to translate to PB because one contains a reference of the other.

// structures for MCF font records
struct MCFHeader {
	BYTE bVersion;
	char szFont[33];
	short nChars;
};

struct MCFCharRecord {
	BYTE ch;
	short bFillable;
	fPoint2D fpMin;
	fPoint2D fpMax;
};

'Start of difficulties:
'======================

typedef struct tagMyCharRecord* PMyCharRecord;
typedef struct tagMyEntityRecord* PMyEntityRecord;

typedef struct tagMyCharRecord {
	BYTE ch;
	BOOL tfDefined;
	short bFillable;
	fPoint2D fpMin, fpMax;
	short nEntities;
	PMyEntityRecord pLast;
	PMyEntityRecord pNext;
} MyCharRecord;

typedef struct tagMyEntityRecord {
	BYTE bKind;
	short nPoints;
	fPoint2D* Points;
	PMyEntityRecord pNext;
} MyEntityRecord;

'End of difficulties
'===================

// defines
#define ENDOFCHAR 99  // end-of-character marker for MCF
#define MAXREAL (FLOAT)(1.0e+38)

How do You think have I to translate it?

Norbert

------------------
Socialism only for people owning everything.
Norbert Doerre

[Kev Peel]

I reorganized the types. They are not circular, but use forward referencing, which is not supported in PB. Also note that the type alignment is BYTE in PB but can be set to another value in C. You may have to look at the docs for the correct alignment.

Hope this helps:

' structures for MCF font records
 
Type MCFHeader
     bVersion As Byte
     szFont As Asciiz * 33
     nChars As Integer
End Type
 
Type MCFCharRecord
     ch As Byte
     bFillable As Integer
     fpMin As fPoint2D
     fpMax As fPoint2D
End Type
 
Type MyEntityRecord
     bKind As Byte
     nPoints As Integer
     Points As fPoint2D Ptr
     pNext As MyEntityRecord Ptr
End Type
 
Type MyCharRecord
     ch As Byte
     tfDefined As Long ' BOOL is a LONG in Win32
     bFillable As Integer
     fpMin As fPoint2D
     fpMax As fPoint2D
     nEntities As Integer
     pLast As MyEntityRecord Ptr
     pNext As MyEntityRecord Ptr
End Type
 
' defines
Macro ENDOFCHAR = 99 ' end-of-character marker for MCF
Macro MAXREAL = (1.0e+38)

------------------
contact me
kgpsoftware.com - Free and Commercial Software

[norbert doerre]

That's just what I tried out first.
It lasted some time however until I was aware that forward
referencing is not allowed in PB. ;-)

But Your code won't run nevertheless because PMyCharRecord and
PMyEntityRecord are lacking.
These definitions are used later in the code to define for instance

'PMyEntityRecord recEnt'

or

'PMyCharRecord recChar'.

That's just what I don't know how to handle in PB.
The difficulty is that forward referencing from/to the
typedef struct. PMyCharRecord and PMyEntityRecord are both
defined as forward reference and at the same time members of
typedef struct tagMyCharRecord{...} and tagMyEntityRecord{...}.

Norbert

------------------
Socialism only for people owning everything.
Norbert Doerre



[This message has been edited by norbert doerre (edited March 04, 2006).]

[Kev Peel]

They are just pointers. Use MACRO PMyCharRecord = MyCharRecord Ptr, for example and all should be well. This should be done after the TYPE declarations.

------------------
contact me
kgpsoftware.com - Free and Commercial Software

[This message has been edited by Kev Peel (edited March 04, 2006).]

[norbert doerre]

Originally posted by Kev Peel:
They are just pointers. Use MACRO PMyCharRecord = MyCharRecord Ptr, for example and all should be well. This should be done after the TYPE declarations.

Yes, 'macro' does it. I don't find much about macro definitions in
the PB manual. But I have now an idea how to handle it. :-)

Thanks
Norbert

------------------
Socialism only for people owning everything.
Norbert Doerre

[Mike Trader]

nevermind


THESE 5 CHARACTERS SEQUENTIALLY:
LOWER CASE "I"
AMPERSAND
LOWER CASE "L"
LOWER CASE "T"
SEMICOLON

are the way HTML represents

i<

just figured it out.

That what you get for copying code from a web page I guess


[This message has been edited by Mike Trader (edited March 04, 2006).]