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Using Compaq COBOL in the Alpha Common Language Environment
13.6 Examples (OpenVMS)
Example 13–6 Using LIB$K_* and LIB$_* Symbols (OpenVMS)
identification division.
program-id. SETSYM.
environment division.
data division.
working-storage section.
01 LOCAL-SYM pic S9(9) comp value external LIB$K_CLI_LOCAL_SYM.
01 GLOBAL-SYM pic S9(9) comp value external LIB$K_CLI_GLOBAL_SYM.
01 COND-VAL pic S9(9) comp.
88 COND-NORMAL value external SS$_NORMAL.
88 COND-AMBSYMDEF value external LIB$_AMBSYMDEF.
procedure division.
1. call "LIB$SET_SYMBOL" using
by descriptor "XSET*SYM"
by descriptor "Test1A"
by reference LOCAL-SYM
giving COND-VAL.
if COND-AMBSYMDEF display "Ambiguous"
else if COND-NORMAL display "OK"
else display "Not OK".
2. call "LIB$SET_SYMBOL" using
by descriptor "XSETS"
by descriptor "Test1B"
by reference LOCAL-SYM
giving COND-VAL.
if COND-AMBSYMDEF display "Ambiguous"
else if COND-NORMAL display "OK"
else display "Not OK".
3. call "LIB$SET_SYMBOL" using
by descriptor "XSETS"
by descriptor "Test1C"
by reference GLOBAL-SYM
giving COND-VAL.
if COND-AMBSYMDEF display "Ambiguous"
else if COND-NORMAL display "OK"
else display "Not OK".
9. stop run.
This uses the following macro,
libdef.mar
:
.TITLE libdef
$HLPDEF GLOBAL ; case sensitive!
.END
The program is compiled, linked, and run, as follows:
$ cobol setsym
$ macro libdef
$ link setsym,libdef
$ run setsym
OK
Ambiguous
OK
$ show symbol xset*
XSETS == "Test1C"
XSET*SYM = "Test1A"
13–22 Using Compaq COBOL in the Alpha Common Language Environment