qgsdbfbase.h

一个非常好的GIS开源新版本

/***************************************************************************
    qgsbdfbase.h - Dbase IV Header
     --------------------------------------
    Date                 : 25-Dec-2003
    Copyright            : (C) 2003 by Gary E.Sherman
    email                : sherman at mrcc.com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
/* $Id: qgsdbfbase.h 851 2004-02-14 16:44:16Z gsherman $ */

// Dbase header structure

struct DbaseHeader {
    unsigned char valid_dbf;
    char year;
    char month;
    char day;
    long num_recs;
    short size_hdr;
    short size_rec;
    char reserved[3];
    char lan[13];
    char reserved2[4];
};
// Field descriptor array - defines a field and its attributes (type,
// length, etc.
struct FieldDescriptorArray {
	char field_name[11];
	char field_type;
	long field_addr;  /* used only in memory */
	unsigned char field_length;
	unsigned char field_decimal;
	char reserved[2];
	char work_area;
	char lan[2];
	char set_fields;
	char reserved2[8];
};
// Typedefs
typedef struct FieldDescriptorArray Fda;
typedef struct DbaseHeader DbH;

// Field Array class
class DbaseFieldArray {
public:
	DbaseFieldArray(int numberOfFields);
	void addField(char *name, char type, unsigned char length,
			unsigned char decimal);
	int getNumFields();
	Fda  *getField(int index);
private:
	struct FieldDescriptorArray *fda;
	unsigned int fieldCount;
	int numFields;

};

// Dbase file class (incomplete implementation)
class DbaseFile {
public:
    DbaseFile(char *fileName, int numRecords, int recordSize, DbaseFieldArray &fda);
	void writeHeader();
	void writeFieldDescriptors();
	void writeRecord(const char *data);
	void closeFile();
	struct DbaseHeader header;
private:
	char * fileName;
	int numRecords;
	int recordSize;
	DbaseFieldArray fieldArray;
	long pos;
	bool firstRecord;
};