DBFReorderFields()

int SHPAPI_CALL DBFReorderFields	(	DBFHandle	psDBF,
		int *	panMap
	)

Definition at line 1928 of file dbfopen.c.

References DBFFlushRecord(), DBFUpdateHeader(), FALSE, free(), malloc(), SHPAPI_CALL, and TRUE.

{
    SAOffset nRecordOffset;
    int      i, iRecord;
    int     *panFieldOffsetNew;
    int     *panFieldSizeNew;
    int     *panFieldDecimalsNew;
    char    *pachFieldTypeNew;
    char    *pszHeaderNew;
    char    *pszRecord;
    char    *pszRecordNew;

    if ( psDBF->nFields == 0 )
        return TRUE;

    /* make sure that everything is written in .dbf */
    if( !DBFFlushRecord( psDBF ) )
        return FALSE;

    panFieldOffsetNew = (int *) malloc(sizeof(int) * psDBF->nFields);
    panFieldSizeNew = (int *) malloc(sizeof(int) *  psDBF->nFields);
    panFieldDecimalsNew = (int *) malloc(sizeof(int) *  psDBF->nFields);
    pachFieldTypeNew = (char *) malloc(sizeof(char) *  psDBF->nFields);
    pszHeaderNew = (char*) malloc(sizeof(char) * 32 *  psDBF->nFields);

    /* shuffle fields definitions */
    for(i=0; i < psDBF->nFields; i++)
    {
        panFieldSizeNew[i] = psDBF->panFieldSize[panMap[i]];
        panFieldDecimalsNew[i] = psDBF->panFieldDecimals[panMap[i]];
        pachFieldTypeNew[i] = psDBF->pachFieldType[panMap[i]];
        memcpy(pszHeaderNew + i * 32,
               psDBF->pszHeader + panMap[i] * 32, 32);
    }
    panFieldOffsetNew[0] = 1;
    for(i=1; i < psDBF->nFields; i++)
    {
        panFieldOffsetNew[i] = panFieldOffsetNew[i - 1] + panFieldSizeNew[i - 1];
    }

    free(psDBF->pszHeader);
    psDBF->pszHeader = pszHeaderNew;

    /* we're done if we're dealing with not yet created .dbf */
    if ( !(psDBF->bNoHeader && psDBF->nRecords == 0) )
    {
        /* force update of header with new header and record length */
        psDBF->bNoHeader = TRUE;
        DBFUpdateHeader( psDBF );

        /* alloc record */
        pszRecord = (char *) malloc(sizeof(char) * psDBF->nRecordLength);
        pszRecordNew = (char *) malloc(sizeof(char) * psDBF->nRecordLength);

        /* shuffle fields in records */
        for (iRecord = 0; iRecord < psDBF->nRecords; iRecord++)
        {
            nRecordOffset =
                psDBF->nRecordLength * (SAOffset) iRecord + psDBF->nHeaderLength;

            /* load record */
            psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
            psDBF->sHooks.FRead( pszRecord, psDBF->nRecordLength, 1, psDBF->fp );

            pszRecordNew[0] = pszRecord[0];

            for(i=0; i < psDBF->nFields; i++)
            {
                memcpy(pszRecordNew + panFieldOffsetNew[i],
                       pszRecord + psDBF->panFieldOffset[panMap[i]],
                       psDBF->panFieldSize[panMap[i]]);
            }

            /* write record */
            psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
            psDBF->sHooks.FWrite( pszRecordNew, psDBF->nRecordLength, 1, psDBF->fp );
        }

        /* free record */
        free(pszRecord);
        free(pszRecordNew);
    }

    free(psDBF->panFieldOffset);
    free(psDBF->panFieldSize);
    free(psDBF->panFieldDecimals);
    free(psDBF->pachFieldType);

    psDBF->panFieldOffset = panFieldOffsetNew;
    psDBF->panFieldSize = panFieldSizeNew;
    psDBF->panFieldDecimals =panFieldDecimalsNew;
    psDBF->pachFieldType = pachFieldTypeNew;

    psDBF->nCurrentRecord = -1;
    psDBF->bCurrentRecordModified = FALSE;

    return TRUE;
}

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