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<P style="FONT-WEIGHT: bold; FONT-SIZE: 14pt; TEXT-ALIGN: left">File:
Datafile.em</P>
<P style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; TEXT-ALIGN: left">Description:
Functions to access generic data files.<BR>Last Modified: 5/1/2003</P>
<P>File Constants: <PRE><UL>// OpenDataFile flags:<BR>// can specify only one of the following:<BR>const DF_KEYTYPE_STRING := 0x00; // default<BR>const DF_KEYTYPE_INTEGER := 0x01;<BR></UL></PRE>
<P></P>
<TABLE cellSpacing=0 cellPadding=1 rules=groups width="75%" align=center
bgColor=#dddddd border=1 frame=box>
<TBODY>
<TR><A name=#CreateDataFile>
<TH align=middle colSpan=2>CreateDataFile( filespec, flags :=
DF_KEYTYPE_STRING )</TH></A></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Parameters:</TH></TR></TBODY>
<TBODY>
<TR bgColor=#d4d4d4>
<TD>Name</TD>
<TD>Type</TD></TR></TBODY>
<TBODY>
<TR>
<TD width="50%"><VAR>filespec</VAR></TD>
<TD>String</TD></TR>
<TR>
<TD width="50%"><VAR>flags</VAR></TD>
<TD>Integer</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Explanation</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2>Creates a new data file.</TD></TR>
<TR>
<TD colSpan=2>filespec is in normal package descriptor format. 'filename'
or '::filename' will create the new data file /data/ds/filename.
':pkgname:filename' will create /data/ds/pkgname/filename.</TD></TR>
<TR>
<TD colSpan=2>flags specifies if the keys of the new datafile are strings
OR integers.</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Return values</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2>DataFile Reference. See the DataFile object
documentation.</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Errors</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2>"Error in descriptor"</TD></TR>
<TR>
<TD colSpan=2>"An exception occurred"</TD></TR>
<TR>
<TD colSpan=2>"Invalid parameter type"</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Related</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2><A
href="objref.html#Datafile"><B>Datafile</B></A></TD></TR></TBODY></TABLE><BR><BR><BR>
<TABLE cellSpacing=0 cellPadding=1 rules=groups width="75%" align=center
bgColor=#dddddd border=1 frame=box>
<TBODY>
<TR><A name=#OpenDataFile>
<TH align=middle colSpan=2>OpenDataFile( filespec )</TH></A></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Parameters:</TH></TR></TBODY>
<TBODY>
<TR bgColor=#d4d4d4>
<TD>Name</TD>
<TD>Type</TD></TR></TBODY>
<TBODY>
<TR>
<TD width="50%"><VAR>filespec</VAR></TD>
<TD>String</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Explanation</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2>Opens a datafile for access.</TD></TR>
<TR>
<TD colSpan=2>filespec is in normal package descriptor format. 'filename'
or '::filename' will open the data file /data/ds/filename.
':pkgname:filename' will open /data/ds/pkgname/filename.</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Return values</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2>DataFile Reference. See the DataFile object
documentation.</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Errors</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2>"Datafile does not exist"</TD></TR>
<TR>
<TD colSpan=2>"Error in descriptor"</TD></TR>
<TR>
<TD colSpan=2>"An exception occurred"</TD></TR>
<TR>
<TD colSpan=2>"Invalid parameter type"</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Related</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2><A
href="objref.html#Datafile"><B>Datafile</B></A></TD></TR></TBODY></TABLE><BR><BR><BR>
<TABLE cellSpacing=0 cellPadding=1 rules=groups width="75%" align=center
bgColor=#dddddd border=1 frame=box>
<TBODY>
<TR><A name=#UnloadDataFile>
<TH align=middle colSpan=2>UnloadDataFile( filespec )</TH></A></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Parameters:</TH></TR></TBODY>
<TBODY>
<TR bgColor=#d4d4d4>
<TD>Name</TD>
<TD>Type</TD></TR></TBODY>
<TBODY>
<TR>
<TD width="50%"><VAR>filespec</VAR></TD>
<TD>String</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Explanation</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2>Unloads a datafile</TD></TR>
<TR>
<TD colSpan=2>filespec is in normal package descriptor format. 'filename'
or '::filename' will unload the data file /data/ds/filename.
':pkgname:filename' will unload /data/ds/pkgname/filename.</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Return values</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2>1 on success</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Errors</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2>"Unable to find data store file"</TD></TR>
<TR>
<TD colSpan=2>"Invalid parameter type"</TD></TR></TBODY>
<TBODY>
<TR bgColor=#cccccc>
<TH align=left colSpan=2>Related</TH></TR></TBODY>
<TBODY>
<TR>
<TD colSpan=2><A
href="objref.html#Datafile"><B>Datafile</B></A></TD></TR></TBODY></TABLE><BR><BR><BR>
<HR>
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racalac@burdell.org </P>
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