DBFFlushRecord()

static int DBFFlushRecord ( DBFHandle  psDBF )

static

Definition at line 195 of file dbfopen.c.

{
    SAOffset    nRecordOffset;
 
    if( psDBF->bCurrentRecordModified && psDBF->nCurrentRecord > -1 )
    {
        psDBF->bCurrentRecordModified = FALSE;
 
        nRecordOffset =
            psDBF->nRecordLength * STATIC_CAST(SAOffset, psDBF->nCurrentRecord)
            + psDBF->nHeaderLength;
 
/* -------------------------------------------------------------------- */
/*      Guard FSeek with check for whether we're already at position;   */
/*      no-op FSeeks defeat network filesystems' write buffering.       */
/* -------------------------------------------------------------------- */
        if ( psDBF->bRequireNextWriteSeek ||
             psDBF->sHooks.FTell( psDBF->fp ) != nRecordOffset ) {
            if ( psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 ) != 0 ) {
                char szMessage[128];
                snprintf( szMessage, sizeof(szMessage),
                          "Failure seeking to position before writing DBF record %d.",
                          psDBF->nCurrentRecord );
                psDBF->sHooks.Error( szMessage );
                return FALSE;
            }
        }
 
        if ( psDBF->sHooks.FWrite( psDBF->pszCurrentRecord,
                               psDBF->nRecordLength,
                               1, psDBF->fp ) != 1 )
        {
            char szMessage[128];
            snprintf( szMessage, sizeof(szMessage), "Failure writing DBF record %d.",
                     psDBF->nCurrentRecord );
            psDBF->sHooks.Error( szMessage );
            return FALSE;
        }
 
/* -------------------------------------------------------------------- */
/*      If next op is also a write, allow possible skipping of FSeek.   */
/* -------------------------------------------------------------------- */
        psDBF->bRequireNextWriteSeek = FALSE;
 
        if( psDBF->nCurrentRecord == psDBF->nRecords - 1 )
        {
            if( psDBF->bWriteEndOfFileChar )
            {
                char ch = END_OF_FILE_CHARACTER;
                psDBF->sHooks.FWrite( &ch, 1, 1, psDBF->fp );
            }
        }
    }
 
    return TRUE;
}

References DBFInfo::bCurrentRecordModified, DBFInfo::bRequireNextWriteSeek, DBFInfo::bWriteEndOfFileChar, END_OF_FILE_CHARACTER, SAHooks::Error, FALSE, DBFInfo::fp, SAHooks::FSeek, SAHooks::FTell, SAHooks::FWrite, DBFInfo::nCurrentRecord, DBFInfo::nHeaderLength, DBFInfo::nRecordLength, DBFInfo::nRecords, DBFInfo::pszCurrentRecord, DBFInfo::sHooks, STATIC_CAST, and TRUE.

Referenced by DBFAddNativeFieldType(), DBFAlterFieldDefn(), DBFClose(), DBFLoadRecord(), DBFReorderFields(), DBFUpdateHeader(), DBFWriteAttribute(), DBFWriteAttributeDirectly(), and DBFWriteTuple().

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