#ifndef _PXINTERNAL_H
#define _PXINTERNAL_H

/*****************************************************************
 * Paradox file structure headers                                *
 * (c)2000 Richard Odekerken                                     *
 *                                                               *
 * Based on information from "The Paradox File Structure" by     *
 * Randy Beck (http://ourworld.compuserve.com/homepages/bex/)    *
 *****************************************************************/

typedef unsigned char 		PXBYTE;
typedef signed short int 		PXINTEGER;
typedef unsigned short int 	PXWORD;
typedef signed long int 		PXLONGINT;
typedef unsigned char 		PXCHAR;
typedef void 			*PXPOINTER;

#pragma pack(1)

typedef struct _pxheader
{
	PXINTEGER	recordSize;
	PXINTEGER	headerSize;
	PXBYTE		fileType;
	PXBYTE		maxTableSize;
	PXLONGINT	numRecords;
	PXWORD		nextBlock;
	PXWORD		fileBlocks;
	PXWORD		firstBlock;
	PXWORD		lastBlock;
	PXWORD		unknown000;
	PXBYTE		modifiedFlags1;
	PXBYTE		indexFieldNumber;
	PXPOINTER	primaryIndexWorkspace;
	PXPOINTER	unknown001;
	PXBYTE		unknown002[3];
	PXINTEGER	numFields;
	PXINTEGER	primaryKeyFields;
	PXLONGINT	encryption1;
	PXBYTE		sortOrder;
	PXBYTE		modifiedFlags2;
	PXBYTE		unknown003[2];
	PXBYTE		changeCount1;
	PXBYTE		changeCount2;
	PXBYTE		unknown004;
	PXPOINTER	tableNamePtrPtr;
	PXPOINTER	fldInfoPtr;
	PXBYTE		writeProtected;
	PXBYTE		fileVersionID;
	PXWORD		maxBlocks;
	PXBYTE		unknown005;
	PXBYTE		auxPasswords;
	PXBYTE		unknown006[2];
	PXPOINTER	cryptInfoStartPtr;
	PXPOINTER	cryptInfoEndPtr;
	PXBYTE		unknown007;
	PXLONGINT	autoInc;
	PXBYTE		unknown008[2];
	PXBYTE		indexUpdateRequired;
	PXBYTE		unknown009[5];
	PXBYTE		refIntegrity;
	PXBYTE		unknown010[2];
} PXHEADER;

/*
 Paradox 4+ Data File Header -- offsets 0058 to 0077
 ===========================

 This part of the description applies only to .DB data files and .Xnn index
 files for Paradox versions 4.0 and later.
*/

typedef struct _px4header
{

	PXINTEGER	unknown011;
	PXINTEGER	unknown012;
	PXLONGINT	encryption2;
	PXLONGINT	fileUpdateTime;
	PXINTEGER	hiFieldID;
	PXINTEGER	hiFieldIDinfo;
	PXINTEGER	sometimesNumFields;
	PXINTEGER	dosGlobalCodePage;
	PXBYTE		unknown013[4];
	PXINTEGER	changeCount4;
	PXBYTE		unknown014[6];
} PX4HEADER;

typedef struct _pxblockheader
{
	PXWORD		nextBlock;
	PXWORD		blockNumber;
	PXINTEGER	addDataSize;
} PXBLOCKHEADER;
/*

 This section begins where the previous section left off:

 offset
==============================================================================
| 0058   Paradox tables version 3.0 and 3.5                                  |
| 0058   Paradox .PX and .Ynn index files (any listed version)               |
| 0078   Paradox tables version 4.0 and above                                |
| 0078   Paradox .Xnn index files version 4.0 and above                      |
==============================================================================
*/


static char *pcVersions[] =
{
	"Unknown", "Unknown", "Unknown",
	"3.0", "3.5", "4.x", "4.x", "4.x", "4.x", "4.x", 
	"5.x", "5.x", "7.x"
};

typedef struct _fldInfoRec
{
	PXBYTE	fType;
	PXBYTE	fSize;
} PXFLDINFOREC;

static char *pcPxFldTypes[] =
{
	"Unknown", "Alpha", "Date", "Short Int", "Long Int",
		"Currency", "Number", "07 Unknown", "08 Unknown", "Logical",
		"0A Unknown", "0B Unknown", "Memo Blob", "Binary Large Object",
		"Formatted Memo Blob", "OLE", "Graphic Blob", "0x11 Unknown",
		"0x12 Unknown", "0x13 Unknown", "Time", "Timestamp", 
		"Autoincrement",	"BCD", "Bytes"
};


static char pcPxFldTypesShort[] =
{
	"?ADSI$N??L??MBFOG???T@+#Y"
};

#define PXTYPE_ALPHA		0x01
#define PXTYPE_DATE		0x02
#define PXTYPE_SHORTINT		0x03
#define PXTYPE_LONGINT		0x04
#define PXTYPE_CURRENCY		0x05
#define PXTYPE_NUMBER		0x06
#define PXTYPE_LOGICAL		0x09
#define PXTYPE_MEMOBLOB		0x0c
#define PXTYPE_BLOB		0x0d
#define PXTYPE_FMEMOBLOB		0x0e
#define PXTYPE_OLE		0x0f
#define PXTYPE_GRAPHBLOB		0x10
#define PXTYPE_TIME		0x14
#define PXTYPE_TIMESTAMP		0x15
#define PXTYPE_AUTOINC		0x16
#define PXTYPE_BCD		0x17
#define PXTYPE_BYTES		0x18

#endif