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PDP-10 Archives
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cbl12b.d10
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EDIT DESCRIPTIONS FOR COBOL-10-V12B
EDIT 1546 FOR COBOL
[SYMPTOM]
When moving a literal 0.0 to any identifier with an assumed
decimal place the expected result of zero is not produced.
In some cases the previous field is also altered.
[DIAGNOSIS]
Once not so very long ago edit 1507 was added to the COBOL
compiler to handle figurative constants more consistently.
In so adding this edit another bug, which exhibits the above
symptoms, was introduced. At a particular point the
compiler decides that the sending field is zeroes and that
is what should be moved, however it didn't take into
consideration the mode receiving field.
[CURE]
Take into consideration the mode of the receiving field.
********************************************************************************
EDIT 1547 FOR COBOL
[SYMPTOM]
DEC extension warnings are interspersed in the source
listing rather than at the end of the listing. Thereby
disrupting the listing.
[DIAGNOSIS]
Same as SYMPTOM.
[CURE]
Move these class of warnings to the end of the listing.
********************************************************************************
EDIT 1550 FOR COBOL
[SYMPTOM]
Spurious warning 656 "DEC extension - highest numerical
value used" on the statement. SET CLR TO 0. Where CLR is
INDEX.
[DIAGNOSIS]
Some bits in the flag word wasn't cleared appropriately on
handling of literals.
[CURE]
Clear the flag word when it's a literal.
********************************************************************************
EDIT 7 FOR CPYLIB
[SYMPTOM]
When updating a library file in one directory while pathed
to another directory, the PPN/Path Address word is lost,
causing the wrong directory to be searched when a session is
ended and the backup file is to be created.
[DIAGNOSIS]
When opening a file via a FILOP. function, the address of
the LOOKUP and RENAME blocks is placed in the FILOP.'s
argument block. When the open is done, the PPN/Path address
word of the LOOKUP block is replaced by the file size. When
the updating session is completed, another FILOP. is done
to rename the original file to the backup file. Since the
PPN/Path word has not been restored in the LOOKUP block,
this procedure fails.
[CURE]
Edit 7 to CPYLIB and IOTMP will restore the PPN/Path data to
the LOOKUP block, as well as restore the RENAME block data
which may be altered should the first attempt at a rename
result in a duplicate file. If no path is specified in the
file specs, the default path will be used for all files.
********************************************************************************
EDIT 1130 FOR LIBOL
[SYMPTOM]
If an ASCII sequential file is used in a program with an
OPEN I-O statement for the file anywhere in the program,
with the data record being SIXBIT and the file containing a
record shorter than the maximum length, the remaining
characters in the record get filled with @'s instead of
blanks.
[DIAGNOSIS]
When an OPEN I-O statement appears in a program for a file
all the appropriate flags are set so that it goes through
the I-O routine for the read. In this particular case the
external recording mode is ascii and the internal mode is
sixbit, it needs to go through a conversion process which
wasn't happening properly.
[CURE]
Add a statement to perform the conversion.
********************************************************************************
END OF COBOL-10-V12B