Document revision date: 19 July 1999
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OpenVMS RTL String Manipulation (STR$) Manual

OpenVMS RTL String Manipulation (STR$) Manual

Order Number: AA--PV6MC--TK

January 1999

This manual documents the string manipulation routines contained in the STR$ facility of the OpenVMS Run-Time Library.

Revision/Update Information: This manual supersedes the OpenVMS RTL String Manipulation (STR$) Manual, OpenVMS Alpha Version 7.0 and OpenVMS VAX Version 7.0.

Software Version: OpenVMS Alpha Version 7.1 OpenVMS VAX Version 7.1 The content of this document has not changed since OpenVMS Version 7.1.

Compaq Computer Corporation
Houston, Texas

Reprinted January 1999

Compaq Computer Corporation makes no representations that the use of its products in the manner described in this publication will not infringe on existing or future patent rights, nor do the descriptions contained in this publication imply the granting of licenses to make, use, or sell equipment or software in accordance with the description.

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© Compaq Computer Corporation 1999. All rights reserved.

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The OpenVMS documentation set is available on CD-ROM.

This document was prepared using VAX DOCUMENT, Version V3.2n.

Contents Index


This manual provides users of the OpenVMS operating system with detailed usage and reference information about the string manipulation routines supplied in the STR$ facility of the Run-Time Library.

Intended Audience

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

Document Structure

This manual is organized into two parts as follows:

Related Documents

The Run-Time Library routines are documented in a series of reference manuals. A description of how the Run-Time Library routines are accessed is presented in OpenVMS Programming Interfaces: Calling a System Routine. A description of OpenVMS features and functionality available through calls to the STR$ Run-Time Library appears in the OpenVMS Programming Concepts Manual. Descriptions of other RTL facilities and their corresponding routines and usages are discussed in the following books:

The Guide to DECthreads contains guidelines and reference information for DECthreads, the Digital Multithreading Run-Time Library.

The OpenVMS Calling Standard contains useful information for anyone who wants to call Run-Time Library routines.

Application programmers using any programming language can refer to the Guide to Creating OpenVMS Modular Procedures for writing modular and reentrant code.

High-level language programmers will find additional information on calling Run-Time Library routines in their language reference manual. Additional information may also be found in the language user's guide provided with your OpenVMS language software.

For a complete list and description of the manuals in the OpenVMS documentation set, see the Overview of OpenVMS Documentation.

For additional information on the Open Systems Software Group (OSSG) products and services, access the following OpenVMS World Wide Web address: 

Reader's Comments

Compaq welcomes your comments on this manual.

Print or edit the online form SYS$HELP:OPENVMSDOC_COMMENTS.TXT and send us your comments by:
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The following conventions are used in this manual:
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Part 1
STR$ Tutorial Section

This part of the OpenVMS RTL String Manipulation (STR$) Manual contains a tutorial for the OpenVMS RTL String Manipulation (STR$) facility.

The material is structured as follows:

Chapter 1
Run-Time Library String Manipulation (STR$) Facility

This chapter contains an overview of the STR$ facility and lists the routines and their functions. Chapter 2 explains in detail how the STR$ facility handles strings. The STR$ Reference Section describes all the STR$ routines.

1.1 Overview

The STR$ facility provides routines to perform the following functions:

Table 1-1 STR$ Mathematical Operation Routines
Routine Name Function
STR$ADD Add two decimal strings
STR$DIVIDE Divide two decimal strings
STR$MUL Multiply two decimal strings
STR$RECIP Return the reciprocal of a decimal string
STR$ROUND Round or truncate a decimal string

Table 1-2 STR$ Compare Routines
Routine Name Function
STR$CASE_BLIND_COMPARE Compare strings without regard to case
STR$COMPARE Compare two strings
STR$COMPARE_EQL Compare two strings for equality
STR$COMPARE_MULTI Compare two strings for equality using the DEC Multinational Character Set

Table 1-3 STR$ Extract and Replace Routines
Routine Name Function
STR$ELEMENT Extract delimited element substring
STR$LEFT Extract a substring of a string
STR$LEN_EXTR Extract a substring of a string
STR$POS_EXTR Extract a substring of a string
STR$REPLACE Replace a substring
STR$RIGHT Extract a substring of a string

Table 1-4 STR$ Append and Concatenate Routines
Routine Name Function
STR$APPEND Append a string
STR$CONCAT Concatenate two or more strings
STR$PREFIX Prefix a string

Table 1-5 STR$ Copy Routines
Routine Name Function
STR$COPY_DX Copy a source string passed by descriptor to a destination string
STR$COPY_R Copy a source string passed by reference to a destination string
++STR$COPY_R_64 Copy a source string passed by reference to a destination string

++Alpha specific.

Table 1-6 STR$ Search Routines
Routine Name Function
STR$FIND_FIRST_IN_SET Find the first character in a set of characters
STR$FIND_FIRST_NOT_IN_SET Find the first character that does not occur in the set
STR$FIND_FIRST_SUBSTRING Find the first substring in the input string

Table 1-7 STR$ Allocate and Deallocate Routines
Routine Name Function
STR$FREE1_DX Free one dynamic string
STR$GET1_DX Allocate one dynamic string
++STR$GET1_DX_64 Allocate one dynamic string

++Alpha specific.

Table 1-8 STR$ Miscellaneous Routines
Routine Name Function
STR$ANALYZE_SDESC Analyze a string descriptor
++STR$ANALYZE_SDESC_64 Analyze a string descriptor
STR$DUPL_CHAR Duplicate character n times
STR$MATCH_WILD Match a wildcard specification
STR$POSITION Return relative position of a substring
STR$TRANSLATE Translate matched characters
STR$TRIM Trim trailing blanks and tabs
STR$UPCASE Convert string to all uppercase

++Alpha specific.

1.1.1 64-Bit Addressing Support (Alpha Only)

On Alpha systems, the String Manipulation (STR$) routines provide 64-bit virtual addressing capabilities as follows:

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

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