Function writeHeader

mapxbase.c:71–116

/ writeHeader() */ / This is called to write out the file header, and field */ descriptions before writing any actual data records. This */ also computes all the DBFDataSet field offset/size/decimals */ and so forth values. */ /

/*      and so forth values.                                            */
/************************************************************************/
static void writeHeader(DBFHandle psDBF)

{
    uchar	abyHeader[32];
    int		i;

    if( !psDBF->bNoHeader )
        return;

    psDBF->bNoHeader = MS_FALSE;

    /* -------------------------------------------------------------------- */
    /*	Initialize the file header information.		    		    */
    /* -------------------------------------------------------------------- */
    for( i = 0; i < 32; i++ )
        abyHeader[i] = 0;

    abyHeader[0] = 0x03;		/* memo field? - just copying 	*/

    /* date updated on close, record count preset at zero */

    abyHeader[8] = psDBF->nHeaderLength % 256;
    abyHeader[9] = psDBF->nHeaderLength / 256;
    
    abyHeader[10] = psDBF->nRecordLength % 256;
    abyHeader[11] = psDBF->nRecordLength / 256;

    /* -------------------------------------------------------------------- */
    /*      Write the initial 32 byte file header, and all the field        */
    /*      descriptions.                                     		    */
    /* -------------------------------------------------------------------- */
    fseek( psDBF->fp, 0, 0 );
    fwrite( abyHeader, 32, 1, psDBF->fp );
    fwrite( psDBF->pszHeader, 32, psDBF->nFields, psDBF->fp );

    /* -------------------------------------------------------------------- */
    /*      Write out the newline character if there is room for it.        */
    /* -------------------------------------------------------------------- */
    if( psDBF->nHeaderLength > 32*psDBF->nFields + 32 )
    {
        char	cNewline;

        cNewline = 0x0d;
        fwrite( &cNewline, 1, 1, psDBF->fp );
    }
}

/************************************************************************/
/*                           flushRecord()                              */