Transact

Transact_GetDataFileLength
(SWI &4FC10)

This SWI which appears in the v0.2.2 release of the Transact engine allows a client application to know wether a datafile is currently handled by the Transact Engine and, if yes, know the length of the file as known to the current session.

On entry

• R0 = External session ID as returned by Transact_CreateSession;
• R1 = Data file's external ID (NULL or pointer to the pathname of the file);
• R2 = Pointer to internal ID for the file to be accessed;
  

On exit

• R0 = Size of file if already opened by the Transact Engine;
• R1 = 0 if the Transact engine has'nt opened the data file yet, 1 otherwise.

Possible errors

• &812B00 Busy (not yet implemented in this release)
• &812B00 Busy (not yet implemented in this release)
• &812B03 Invalid parameters
• &812B01 Unknown session