Processing of INEXIT
The INEXIT exit module is used to read the primary source code instead of obtaining it directly from SYSIN.
|Action by compiler||Action by exit module|
|Loads the exit module (mod1) during initialization|
|Calls the exit module with an OPEN operation code (op code)||Prepares its source for processing. Passes the status of the OPEN request back to the compiler.|
|Calls the exit module with a GET op code when a source statement is needed||Returns either the address and length of the next statement or the end-of-data indication (if no more source statements exist)|
|Calls the exit module with a CLOSE op code when the end-of-data is presented||Releases any resources that are related to its output|
The compiler uses 10 parameters, passed by reference, to communicate with the exit module. The return code, data length, and data parameters are set by the exit module for return to the compiler; the other items are passed from the compiler to the exit module.
|Parameter number||Parameter item||Description of item|
|1||User-exit type||Halfword that identifies which user exit is to
perform the operation.
|2||Operation code||Halfword that indicates the type of operation:
|3||Return code||Fullword, set by the exit module, that indicates
the success of the requested operation:
|4||User-exit work area||Six-fullword work area provided by
the compiler for use by the user-exit module.
First word: for use by INEXIT
|5||Data length||Fullword, set by the exit module, that specifies the length of the record being returned by the GET operation (must be 80)|
|6||Data or str1||Fullword, set by the exit module, that contains
the address of the record in a user-owned buffer, for the GET operation.
str1 applies only to OPEN. The first halfword (on a halfword boundary) contains the length of the string, followed by the string.
|7||Not used||(Used only by LIBEXIT and MSGEXIT)|
|8||Not used||(Used only by LIBEXIT)|
|9||Not used||(Used only by LIBEXIT)|
|10||Not used||(Used only by LIBEXIT)|