ogr_core.h

用于读取TAB、MIF、SHP文件的类

/******************************************************************************
 * $Id: ogr_core.h,v 1.30 2006/04/02 18:25:59 fwarmerdam Exp $
 *
 * Project:  OpenGIS Simple Features Reference Implementation
 * Purpose:  Define some core portability services for cross-platform OGR code.
 * Author:   Frank Warmerdam, [e-mail]
 *
 ******************************************************************************
 * Copyright (c) 1999, Frank Warmerdam
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ******************************************************************************
 *
 * $Log: ogr_core.h,v $
 * Revision 1.30  2006/04/02 18:25:59  fwarmerdam
 * added OFTDateTime, and OFTTime support
 *
 * Revision 1.29  2006/02/15 04:25:37  fwarmerdam
 * added date support
 *
 * Revision 1.28  2005/08/30 23:52:35  fwarmerdam
 * implement preliminary OFTBinary support
 *
 * Revision 1.27  2005/07/29 15:54:07  fwarmerdam
 * ogrmakewktcoordinate defined in ogr_p.h
 *
 * Revision 1.26  2005/07/29 04:12:47  fwarmerdam
 * expose OGRMakeWktCoordinates
 *
 * Revision 1.25  2005/02/02 19:59:47  fwarmerdam
 * added SetNextByIndex support
 *
 * Revision 1.24  2003/10/09 15:27:41  warmerda
 * added OGRLayer::DeleteFeature() support
 *
 * Revision 1.23  2003/09/11 19:59:41  warmerda
 * avoid casting issue with UNFIX macro
 *
 * Revision 1.22  2003/08/27 15:40:37  warmerda
 * added support for generating DB2 V7.2 compatible WKB
 *
 * Revision 1.21  2003/08/11 03:28:04  warmerda
 * Export OGREnvelope C++ class with CPL_DLL as per bug 378.
 *
 * Revision 1.20  2003/06/09 13:48:54  warmerda
 * added DB2 V7.2 byte order hack
 *
 * Revision 1.19  2003/05/08 13:27:22  warmerda
 * dont use C++ comments in this c includable file
 *
 * Revision 1.18  2003/04/29 19:03:58  warmerda
 * removed extra comma
 *
 * Revision 1.17  2003/03/03 05:05:54  warmerda
 * added support for DeleteDataSource and DeleteLayer
 *
 * Revision 1.16  2003/02/19 02:57:49  warmerda
 * added wkbLinearRing support
 *
 * Revision 1.15  2003/01/14 20:08:49  warmerda
 * fixed another bug in OGREnvelope.Merge
 *
 * Revision 1.14  2003/01/07 17:51:55  warmerda
 * fixed OGREnvelope.Merge()
 *
 * Revision 1.13  2003/01/06 17:56:03  warmerda
 * Added Merge and IsInit() method on OGREnvelope
 *
 * Revision 1.12  2002/11/08 18:25:45  warmerda
 * remove extranious comma in enum, confuses HPUX compiler
 *
 * Revision 1.11  2002/11/08 15:42:41  warmerda
 * ensure type correctness of wkbFlatten
 *
 * Revision 1.10  2002/10/24 20:53:02  warmerda
 * expand tabs
 *
 * Revision 1.9  2002/09/26 18:13:17  warmerda
 * moved some defs to ogr_core.h for sharing with ogr_api.h
 *
 * Revision 1.8  2000/07/11 20:15:12  warmerda
 * apply CPL_DLL to OGR functions
 *
 * Revision 1.7  2000/07/09 20:47:35  warmerda
 * added CPL_START/END
 *
 * Revision 1.6  1999/11/18 19:02:19  warmerda
 * expanded tabs
 *
 * Revision 1.5  1999/07/07 04:23:07  danmo
 * Fixed typo in  #define _OGR_..._H_INCLUDED  line
 *
 * Revision 1.4  1999/07/05 18:56:52  warmerda
 * now includes cpl_port.h
 *
 * Revision 1.3  1999/07/05 17:19:03  warmerda
 * added OGRERR_UNSUPPORTED_SRS
 *
 * Revision 1.2  1999/05/31 15:00:37  warmerda
 * added generic OGRERR_FAILURE error code.
 *
 * Revision 1.1  1999/05/20 14:35:00  warmerda
 * New
 *
 */

#ifndef _OGR_CORE_H_INCLUDED
#define _OGR_CORE_H_INCLUDED

#include "cpl_port.h"

/**
 * Simple container for a bounding region.
 */

#ifdef __cplusplus
class CPL_DLL OGREnvelope
{
  public:
        OGREnvelope()
        {
                MinX = MaxX = MinY = MaxY = 0;
        }
    double      MinX;
    double      MaxX;
    double      MinY;
    double      MaxY;

    int  IsInit() { return MinX != 0 || MinY != 0 || MaxX != 0 || MaxY != 0; }
    void Merge( OGREnvelope & sOther ) {
        if( IsInit() )
        {
            MinX = MIN(MinX,sOther.MinX);
            MaxX = MAX(MaxX,sOther.MaxX);
            MinY = MIN(MinY,sOther.MinY);
            MaxY = MAX(MaxY,sOther.MaxY);
        }
        else
        {
            MinX = sOther.MinX;
            MaxX = sOther.MaxX;
            MinY = sOther.MinY;
            MaxY = sOther.MaxY;
        }
    }
};
#else
typedef struct
{
    double      MinX;
    double      MaxX;
    double      MinY;
    double      MaxY;
} OGREnvelope;
#endif

CPL_C_START

void CPL_DLL *OGRMalloc( size_t );
void CPL_DLL *OGRCalloc( size_t, size_t );
void CPL_DLL *OGRRealloc( void *, size_t );
char CPL_DLL *OGRStrdup( const char * );
void CPL_DLL OGRFree( void * );

typedef int OGRErr;

#define OGRERR_NONE                0
#define OGRERR_NOT_ENOUGH_DATA     1    /* not enough data to deserialize */
#define OGRERR_NOT_ENOUGH_MEMORY   2
#define OGRERR_UNSUPPORTED_GEOMETRY_TYPE 3
#define OGRERR_UNSUPPORTED_OPERATION 4
#define OGRERR_CORRUPT_DATA        5
#define OGRERR_FAILURE             6
#define OGRERR_UNSUPPORTED_SRS     7

typedef int     OGRBoolean;

/* -------------------------------------------------------------------- */
/*      ogr_geometry.h related definitions.                             */
/* -------------------------------------------------------------------- */
/**
 * List of well known binary geometry types.  These are used within the BLOBs
 * but are also returned from OGRGeometry::getGeometryType() to identify the
 * type of a geometry object.
 */

typedef enum 
{
    wkbUnknown = 0,             /* non-standard */
    wkbPoint = 1,               /* rest are standard WKB type codes */
    wkbLineString = 2,
    wkbPolygon = 3,
    wkbMultiPoint = 4,
    wkbMultiLineString = 5,
    wkbMultiPolygon = 6,
    wkbGeometryCollection = 7,
    wkbNone = 100,              /* non-standard, for pure attribute records */
    wkbLinearRing = 101,        /* non-standard, just for createGeometry() */
    wkbPoint25D = 0x80000001,   /* 2.5D extensions as per 99-402 */
    wkbLineString25D = 0x80000002,
    wkbPolygon25D = 0x80000003,
    wkbMultiPoint25D = 0x80000004,
    wkbMultiLineString25D = 0x80000005,
    wkbMultiPolygon25D = 0x80000006,
    wkbGeometryCollection25D = 0x80000007
} OGRwkbGeometryType;

#define wkb25DBit 0x80000000
#define wkbFlatten(x)  ((OGRwkbGeometryType) ((x) & (~wkb25DBit)))

#define ogrZMarker 0x21125711

const char CPL_DLL * OGRGeometryTypeToName( OGRwkbGeometryType eType );

typedef enum 
{
    wkbXDR = 0,         /* MSB/Sun/Motoroloa: Most Significant Byte First   */
    wkbNDR = 1          /* LSB/Intel/Vax: Least Significant Byte First      */
} OGRwkbByteOrder;

#ifndef NO_HACK_FOR_IBM_DB2_V72
#  define HACK_FOR_IBM_DB2_V72
#endif

#ifdef HACK_FOR_IBM_DB2_V72
#  define DB2_V72_FIX_BYTE_ORDER(x) ((((x) & 0x31) == (x)) ? (OGRwkbByteOrder) ((x) & 0x1) : (x))
#  define DB2_V72_UNFIX_BYTE_ORDER(x) ((unsigned char) (OGRGeometry::bGenerate_DB2_V72_BYTE_ORDER ? ((x) | 0x30) : (x)))
#else
#  define DB2_V72_FIX_BYTE_ORDER(x) (x)
#  define DB2_V72_UNFIX_BYTE_ORDER(x) (x)
#endif

/************************************************************************/
/*                  ogr_feature.h related definitions.                  */
/************************************************************************/

/**
 * List of feature field types.  This list is likely to be extended in the
 * future ... avoid coding applications based on the assumption that all
 * field types can be known.
 */

typedef enum 
{
  /** Simple 32bit integer */                   OFTInteger = 0,
  /** List of 32bit integers */                 OFTIntegerList = 1,
  /** Double Precision floating point */        OFTReal = 2,
  /** List of doubles */                        OFTRealList = 3,
  /** String of ASCII chars */                  OFTString = 4,
  /** Array of strings */                       OFTStringList = 5,
  /** Double byte string (unsupported) */       OFTWideString = 6,
  /** List of wide strings (unsupported) */     OFTWideStringList = 7,
  /** Raw Binary data */                        OFTBinary = 8,
  /** Date */                                   OFTDate = 9,
  /** Time */                                   OFTTime = 10,
  /** Date and Time */                          OFTDateTime = 11
} OGRFieldType;

/**
 * Display justification for field values.
 */

typedef enum 
{
    OJUndefined = 0,
    OJLeft = 1,
    OJRight = 2
} OGRJustification;

#define OGRNullFID            -1
#define OGRUnsetMarker        -21121

/************************************************************************/
/*                               OGRField                               */
/************************************************************************/

/**
 * OGRFeature field attribute value union.
 */

typedef union {
    int         Integer;
    double      Real;
    char       *String;
    /* wchar    *WideString; */
    
    struct {
        int     nCount;
        int     *paList;
    } IntegerList;
    
    struct {
        int     nCount;
        double  *paList;
    } RealList;
    
    struct {
        int     nCount;
        char    **paList;
    } StringList;

    /*
    union {
        int   nCount;
        wchar *paList;
    } WideStringList;
    */

    struct {
        int     nCount;
        GByte   *paData;
    } Binary;
    
    struct {
        int     nMarker1;
        int     nMarker2;
    } Set;

    struct {
        GInt16  Year;
        GByte   Month;
        GByte   Day;
        GByte   Hour;
        GByte   Minute;
        GByte   Second;
        GByte   TZFlag; /* 0=unknown, 1=localtime(ambiguous), 
                           100=GMT, 104=GMT+1, 80=GMT-5, etc */
    } Date;
} OGRField;

int CPL_DLL OGRParseDate( const char *pszInput, OGRField *psOutput, 
                          int nOptions );

/* -------------------------------------------------------------------- */
/*      Constants from ogrsf_frmts.h for capabilities.                  */
/* -------------------------------------------------------------------- */
#define OLCRandomRead          "RandomRead"
#define OLCSequentialWrite     "SequentialWrite"
#define OLCRandomWrite         "RandomWrite"
#define OLCFastSpatialFilter   "FastSpatialFilter"
#define OLCFastFeatureCount    "FastFeatureCount"
#define OLCFastGetExtent       "FastGetExtent"
#define OLCCreateField         "CreateField"
#define OLCTransactions        "Transactions"
#define OLCDeleteFeature       "DeleteFeature"
#define OLCFastSetNextByIndex  "FastSetNextByIndex"

#define ODsCCreateLayer        "CreateLayer"
#define ODsCDeleteLayer        "DeleteLayer"

#define ODrCCreateDataSource   "CreateDataSource"
#define ODrCDeleteDataSource   "DeleteDataSource"

CPL_C_END

#endif /* ndef _OGR_CORE_H_INCLUDED */