Transact

Transact_Update
(SWI &4FC04)

Submits an UPDATE request over an existing part of a RISC OS file

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;
• R3 = Start of the zone to update (offset of the first byte from the beginning of the file);
• R4 = End of the zone to update (offset of the last byte from the beginning of the file + 1);
• R5 = Pointer in client's memory where new data image reside

On exit

• All registers preserved.

Possible errors

• &812B00 Busy (not yet implemented in this release)
• &812B01 Unknown session
• &812B02 Unknown object
• &812B05 Invalid parameters
• &812B04 Not enough memory to service this request
• &812B07 Conflict with another session which already has submitted an INSERT request