OpenVMS RTL General Purpose (OTS$) Manual

Updated: 07 June 2001

Order Number: AA--PV6HB--TK

November 1996

This manual documents the general-purpose routines contained in the OTS$ facility of the OpenVMS Run-Time Library.

Revision/Update Information: This manual supersedes the OpenVMS RTL General Purpose (OTS$) Manual, OpenVMS Alpha Version 7.0 and OpenVMS VAX Version 7.0.

Software Version: OpenVMS Alpha Version 7.1 OpenVMS VAX Version 7.1

Digital Equipment Corporation Maynard, Massachusetts

November 1996

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Contents Index

Preface

This manual provides users of the OpenVMS operating system with detailed usage and reference information on general-purpose routines supplied in the OTS$ facility of the Run-Time Library.

Intended Audience

This manual is intended for system and application programmers who write programs that call OTS$ Run-Time Library routines.

Document Structure

This manual is organized into two parts as follows:

Part I contains a brief overview of the OTS$ routines in Chapter 1.
Part 2, the OTS$ Reference Section, provides detailed reference information on each routine contained in the OTS$ facility of the Run-Time Library. This information is presented using the documentation format described in OpenVMS Programming Interfaces: Calling a System Routine. Routine descriptions appear in alphabetical order by routine name.

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Conventions

The name of the OpenVMS AXP operating system has been changed to the OpenVMS Alpha operating system. Any references to OpenVMS AXP or AXP are synonymous with OpenVMS Alpha or Alpha.

VMScluster systems are now referred to as OpenVMS Cluster systems. Unless otherwise specified, references to OpenVMS Clusters or clusters in this document are synonymous with VMSclusters.

In this manual, every use of DECwindows and DECwindows Motif refers to DECwindows Motif for OpenVMS software.

The following conventions are also used in this manual:

Ctrl/ x A sequence such as Ctrl/ x indicates that you must hold down the key labeled Ctrl while you press another key or a pointing device button.

PF1 x or
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GOLD key sequences can also have a slash (/), dash (--), or underscore (_) as a delimiter in EVE commands.

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Part 1
OTS$ Overview

This part of the OpenVMS RTL General Purpose (OTS$) Manual contains a general overview of the routines provided by the OpenVMS RTL General Purpose (OTS$) Facility, and lists them by function.

Chapter 1
Run-Time Library General Purpose (OTS$) Facility

This chapter describes the OpenVMS Run-Time Library General Purpose (OTS$) facility. See the OTS$ Reference Section for a detailed description of each routine within the OTS$ facility.

Most of the OTS$ routines were originally designed to support language compilers. Because they perform general-purpose functions, the routines were moved into the language-independent facility, OTS$.

1.1 Overview

The Run-Time Library General Purpose (OTS$) facility provides routines to perform general-purpose functions. These functions include data type conversions as part of a compiler's generated code, and some mathematical functions.

The OTS$ facility contains routines to perform the following main tasks:

Convert data types (see Table 1-1)
Divide complex and packed decimal values (see Table 1-2)
Move data to a specified destination address (see Table 1-3)
Multiply complex values (see Table 1-4)
Raise a base to an exponent (see Table 1-5)
Copy a source string to a destination string (see Table 1-6)
Return a string area to free storage (see Table 1-7)

Some restrictions apply if you link certain OTS$ routines on an Alpha system. See Section 1.2 for more information about these restrictions.

Table 1-1 OTS$ Conversion Routines
Routine Name Function

OTS$CNVOUT Convert a D-floating, G-floating, or H-floating value to a character string.

OTS$CVT_L_TB Convert an unsigned integer to binary text.

OTS$CVT_L_TI Convert a signed integer to signed integer text.

OTS$CVT_L_TL Convert an integer to logical text.

OTS$CVT_L_TO Convert an unsigned integer to octal text.

OTS$CVT_L_TU Convert an unsigned integer to decimal text.

OTS$CVT_L_TZ Convert an integer to hexadecimal text.

OTS$CVT_TB_L Convert binary text to an unsigned integer value.

OTS$CVT_TI_L Convert signed integer text to an integer value.

OTS$CVT_TL_L Convert logical text to an integer value.

OTS$CVT_TO_L Convert octal text to an unsigned integer value.

OTS$CVT_TU_L Convert unsigned decimal text to an integer value.

OTS$CVT_T_ x Convert numeric text to a D-, F-, G-, or H-floating value.

OTS$CVT_TZ_L Convert hexadecimal text to an unsigned integer value.

For more information on Run-Time Library conversion routines, see the CVT$ reference section in the OpenVMS RTL Library (LIB$) Manual.

Table 1-2 OTS$ Division Routines
Routine Name Function

OTS$DIVC x Perform complex division.

OTS$DIV_PK_LONG Perform packed decimal division with a long divisor.

OTS$DIV_PK_SHORT Perform packed decimal division with a short divisor.

Table 1-3 OTS$ Move Data Routines
Routine Name Function

OTS$MOVE3 Move data without fill.

OTS$MOVE5 Move data with fill.

Table 1-4 OTS$ Multiplication Routine
Routine Name Function

OTS$MULC x Perform complex multiplication.

Table 1-5 OTS$ Exponentiation Routines
Routine Name Function

OTS$POWC xC x Raise a complex base to a complex floating-point exponent.

OTS$POWC xJ Raise a complex base to a signed longword exponent.

OTS$POWDD Raise a D-floating base to a D-floating exponent.

OTS$POWDR Raise a D-floating base to an F-floating exponent.

OTS$POWDJ Raise a D-floating base to a longword integer exponent.

OTS$POWGG Raise a G-floating base to a G-floating or longword integer exponent.

OTS$POWGJ Raise a G-floating base to a longword integer exponent.

+OTS$POWHH_R3 Raise an H-floating base to an H-floating exponent.

+OTS$POWHJ_R3 Raise an H-floating base to a longword integer exponent.

OTS$POWII Raise a word integer base to a word integer exponent.

OTS$POWJJ Raise a longword integer base to a longword integer exponent.

OTS$POWLULU Raise an unsigned longword integer base to an unsigned longword integer exponent.

OTS$POW xLU Raise a floating-point base to an unsigned longword integer exponent.

OTS$POWRD Raise an F-floating base to a D-floating exponent.

OTS$POWRJ Raise an F-floating base to a longword integer exponent.

OTS$POWRR Raise an F-floating base to an F-floating exponent.

+VAX specific.

Table 1-6 OTS$ Copy Source String Routines
Routine Name Function

OTS$SCOPY_DXDX Copy a source string passed by descriptor to a destination string.

OTS$SCOPY_R_DX Copy a source string passed by reference to a destination string.

Table 1-7 OTS$ Return String Area Routines
Routine Name Function

OTS$SFREE1_DD Free one dynamic string.

OTS$SFREEN_DD Free n dynamic strings.

OTS$SGET1_DD Get one dynamic string.

1.2 Linking OTS$ Routines on an Alpha System

On Alpha systems, if you use the OTS$ entry points for certain mathematics routines, you must link against the DPML$SHR.EXE library. Alternately, you can use the equivalent math$ entry point for the routine and link against either STARLET.OBJ or the DPML$SHR.EXE library. Math$ entry points are available only on Alpha systems.

Table 1-8 lists the affected OTS$ entry points with their equivalent math$ entry points. Refer to the Digital Portable Mathematics Library for information about the math$ entry points.

Table 1-8 OTS$ and Equivalent Math$ Entry Points
OTS$ Entry Point Math$ Entry Point

OTS$DIVC math$cdiv_f

OTS$DIVCG_R3 math$cdiv_g

OTS$MULCG_R3 math$cmul_g

OTS$POWCC math$cpow_f

OTS$POWCGCG_R3 math$cpow_g

OTS$POWCJ math$cpow_fq

OTS$POWGG math$pow_gg

OTS$POWGJ math$pow_gq

OTS$POWGLU math$pow_gq

OTS$POWII math$pow_qq

OTS$POWJJ math$pow_qq

OTS$POWLULU math$pow_qq

OTS$POWRJ math$pow_fq

OTS$POWRLU math$pow_fq

OTS$POWRR math$pow_ff

1.2.1 64-Bit Addressing Support (Alpha Only)

On Alpha systems, the General Purpose (OTS$) routines provide 64-bit virtual addressing capabilities as follows:

All OTS$ RTL routines accept 64-bit addresses for arguments passed by reference.
All OTS$ RTL routines also accept either 32-bit or 64-bit descriptors for arguments passed by descriptor.

See the OpenVMS Alpha Guide to 64-Bit Addressing and VLM Features for more information about 64-bit virtual addressing capabilities.

Contents

Index