Annex F. Information Systems

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This Annex provides a set of facilities relevant to Information Systems programming. These fall into several categories:

  • an attribute definition clause specifying Machine_Radix for a decimal subtype;
  • the package Decimal, which declares a set of constants defining the implementation's capacity for decimal types, and a generic procedure for decimal division; and
  • the child packages Text_IO.Editing and Wide_Text_IO.Editing, which support formatted and localized output of decimal data, based on picture String values.

See also: 3.5.9, Fixed Point Types; 3.5.10, Operations of Fixed Point Types; 4.6, Type Conversions; 13.3, Operational and Representation Attributes; A.10.9, Input-Output for Real Types; B.4, Interfacing with COBOL; B.3, Interfacing with C; Annex G, Numerics.

The character and string handling packages in Annex A, Predefined Language Environment are also relevant for Information Systems.

Implementation Advice

If COBOL (respectively, C) is widely supported in the target environment, implementations supporting the Information Systems Annex should provide the child package Interfaces.COBOL (respectively, Interfaces.C) specified in Annex B and should support a convention_identifier of COBOL (respectively, C) in the interfacing pragmas (see Annex B), thus allowing Ada programs to interface with programs written in that language.

Copyright © 1992,1993,1994,1995 Intermetrics, Inc.
Copyright © 2000 The MITRE Corporation, Inc. Ada Reference Manual