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Functional Description
In order to describe the COBOL lan-
guage, the current standard docu-
ments divide it into a nucleus and
eleven functional modules, of which
five are optional.
COBOL85 V2.3 supports the follow-
ing levels:
Nucleus 2 NUC 1,2
Sequential I-O 2 SEQ 1,2
Relative I-O 2 REL 0,2
Indexed I-O 2 INX 0,2
Inter-Program
Communication
2 IPC 1,2
Sort Merge 1 SRT 0,1
Source Text
Manipulation
2 STM 0,2
Optional modules:
Report Writer 1 RPW 0,1
Segmentation 2 SEG 0,2
Intrinsic Function
The remaining optional modules,
Communication and Debug, are
covered in BS2000/OSD by
openUTM and AID respectively.
POSIX support:
COBOL85 supports the POSIX
functionality and the POSIX file sys-
tem in BS2000/OSD.
FIPS flagging with COBOL85:
Certain language elements and dif-
ferent language levels can be identi-
fied in the COBOL programs by
means of flags.
COBOL85 structurizer:
The COBOL85 source text can be
formatted into a clearer structure
using the Beautifier and edited with
graphical structure lists and cross-
references by means of a Pretty
Printer.
COBOL DML:
The COBOL DML (Data Manipula-
tion Language) enables statements
in COBOL programs to be integrated
into the UDS/SQL database system.
ESQL-COBOL:
The ESQL-COBOL preprocessor
implements the COBOL program
interface to the UDS/SQL and
SESAM/SQL database systems via
embedded SQL. This enables SQL
functions to be called directly from
COBOL programs (separate soft-
ware product).
Year 2000 support:
COBOL85 supports Year 2000 con-
versions with extended programming
interfaces with four-digit year for-
mats:
•
With the ACCEPT statement
DATE-ISO4 a 4-digit century date
function in the form YYYY-MM-
DDNNN.
•
With COBOL Intrinsic Functions:
CURRENT-DATE,
DATE-OF-INTEGER,
DAY-OF-INTEGER,
NTEGER-OF-DATE,
INTEGER-OF-DAY and
WHEN-COMPILED.
•
With COBOL standard functions
DATE-TO-YYYYMMDD,
DAY-TO-YYYYDDD and
YEAR-TO-YYYY using the sliding
windows technique to expand
two-digit years into four-digit for-
mat by means of a sliding century
window.
•
With the COBOL SORT/MERGE
statement with sliding window
technique.
Program Description
The COBOL85 development system
is a combination of the COBOL85
compiler and the Common Runtime
Environment CRTE. CRTE is the
common runtime environment for
COBOL85 and C/C++.
The COBOL source program can be
input to the COBOL85 compiler via
files assigned to SYSDTA, via pro-
gram libraries (PLAM) or from the
POSIX file system. The output gen-
erated by the compiler is an object
module and compiler listings. The
object modules are output to the
temporary object module file (OMF),
to program libraries (PLAM) or to the
POSIX file system. The object mod-
ules from one or more independent
compilation runs must be linked to-
gether with CRTE to form a load
module.
When generating /390 format,
object compatibility of BS2000/OSD
applications is granted also for
coming changes of architecture.
The compilation is controlled via the
SDF interface, the COMOPT control
facility or from the POSIX shell. Error
texts are output in English or Ger-
man (user option).
The syntax and semantics of a
COBOL program can be checked by
starting a compiler run without code
generation.
The objects generated by COBOL85
are reusable. This saves on storage
space and reduces the number of
load calls.
The objects generated by COBOL85
can be run above the 16 MB bound-
ary.
COBOL85 applications can make
use of an address space of max.
2 Gbytes (data, modules, Level 01).
A COBOL program can process files
based on different organization
schemes. The form of organization
selected by the user determines the
access method used by the
BS2000/OSD DMS or the POSIX file
system. BS2000/OSD and POSIX
files can be accessed simultane-
ously in a COBOL program.
POSIX extensions:
COBOL85 V2.2 and higher addition-
ally supports POSIX and XPG4 in-
terfaces. These permit the
COBOL85 compiler and COBOL85
applications to be called from the
POSIX shell and programs and data
to be stored in the POSIX file sys-
tem.
XPG4 extensions:
ACCEPT and DISPLAY can be used
for environment variable and com-
mand line processing.
CALL BY VALUE and RETURN
CODE can be used to communicate
with C/C++ programs.
Linking with other COBOL85 pro-
grams and with C/C++, Fortran,
Pascal, PL/I, RPG3 and Assembler
programs is possible via the com-
mon run-time environment CRTE.
Communication with other
COBOL85 programs and with the
operating system is supported by
means of user and task switches,
job variables, command line pa-
rameters and shell variables.
COBOL85 also generates symbol
information to allow symbolic inter-
active debugging using AID.