CRE Programmer's Guide

CRE Services

Common Run-Time Environment (CRE) Programmer’s Guide—528146-004

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CRE and RTL Prefixes

native CRE library functions are intended for the use of the C and C++ run-time

libraries, not for use by user-written C, C++, and pTAL routines.

Only make explicit calls to the CRE library when the language’s semantics do not

provide the desired CRE service. The ability to make explicit calls to CRE library

functions is intended primarily for TAL and pTAL routines in programs written in more

than one programming language—mixed-language programs—that must interact with

resources managed by the CRE.

CRE and RTL Prefixes

Each TNS CRE standard function begins with a four-character prefix: either CRE_ or

RTL_. Some functions have only a CRE_ version, others have only an RTL_ version,

and still others have both a CRE_ version and an RTL_ version.

For some standard functions, the native CRE provides only the function names, which

are case-sensitive. Tables are provided at the beginning of each function or function

group section, showing which functions the native CRE supports and the

Table 2-8. TNS CRE Standard Functions Available in the OSS and Guardian

Environments

Function or Function Group

OSS Environment

(G-Series Systems) Guardian Environment

Standard Math Yes Yes

Sixty-Four Bit Logical Operators Yes Yes

Decimal Conversion Yes Yes

String Yes Yes

Memory Block Yes Yes

SMU (CLU Library) No Yes

Environment Information Yes Yes

Table 2-9. Native CRE Standard Functions Available in the OSS and Guardian