Type ASSEMBLE
Source Lines : 1,979
Fixes Applied : 6
Most Recent Version : Tuesday, December 12, 1978
Last Fix ID : [R13116DS]
Module
DMSLBT (TXTLIB)
Function
TO CREATE A TEXT LIBRARY, TO ADD TEXT FILES TO AN
EXISTING TEXT LIBRARY, TO DELETE TEXT FILES FROM AN
EXISTING TEXT LIBRARY, TO CREATE A DISK FILE THAT LISTS
THE CONTROL SECTION AND ENTRY POINT NAMES IN A TEXT
LIBRARY, OR TO TYPE AT THE TERMINAL THE CONTROL SECTION
AND ENTRY POINT NAMES IN A TEXT LIBRARY.
Attributes
DISK RESIDENT, USER AREA ROUTINE
Operation
THE OPERATION OF TXTLIB DEPENDS ON WHETHER THE CALLING
PROGRAM SPECIFIES GENERATE, ADD, MAP, OR DELETE.
GENERATE:
TXTLIB CALLS THE ERASE COMMAND PROGRAM TO ERASE THE
EXISTING TEXT LIBRARY (IF ANY) WITH THE SAME NAME AS
THE ONE TO BE CREATED. NEXT, TXTLIB INITIALIZES THE
INDEX AND SAVES IT FOR SUBSEQUENT USE TO CALCULATE THE
SIZE OF THE FIRST CONTROL SECTION. THEN TXTLIB CALLS
THE STATE FUNCTION PROGRAM TO DETERMINE IF THE FIRST
INPUT TEXT FILE SPECIFIED EXISTS. IF IT DOES NOT,
TXTLIB SIGNALS AN ERROR BY MEANS OF A TERMINAL MESSAGE
AND PROCESSES THE NEXT INPUT TEXT FILE.
IF THE TEXT FILE EXISTS, TXTLIB CALLS THE RDBUF
FUNCTION PROGRAM TO READ THE FIRST RECORD IN THE FILE
AND CHECKS THE FIRST COLUMN FOR A BLANK ( INDICATING
THAT IT MAY BE AN OS LINKAGE EDITOR CONTROL CARD) AND
IF IT IS NOT, THE RECORD IS PASSED ON TO BE WRITTEN OUT
(THIS PROCESS IS FURTHER DESCRIBED LATER). IF THE FIRST
COLUMN IS BLANK AND A LINKAGE EDITOR OPERATOR IS DETECTED,
CONTROL IS PASSED TO THE APPROPRIATE PROCESSING
ROUTINE, OTHERWISE THE CARD WILL BE WRITTEN TO THE TEXT DECK
AND PROCESSED IN THE STANDARD FASHION.
THE LINKAGE EDITOR OPERATORS THAT ARE PROCESSED CONSIST
OF THREE: ENTRY, ALIAS AND NAME. THE FOLLOWING DESCRIBES
THE EFFECT OF EACH OPERATOR.
ENTRY - THE FIRST VALID ENTRY CARD ENCOUNTERED SETS THE ENTRY
POINT NAME FIELD IN THE LDT CARD, WHICH IS TO
BE PUT OUT WHEN THE TEXT DECK IS COMPLETED.
Calls to Other Routines
NONE