HP Deskjet 3000 Manual de usuario

HP RPG/XL Utilities

HP 3000 MPE/iX Computer Systems

Edition 1

Manufacturing Part Number: 30318-90006

E1089

U.S.A. October 1989

Notice

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HP RPG/XL Utilities-Part 1 XSORT

1 PREFACE

EXTRA FUNCTION SORT FOR RPG (XSORT)

This manual is intended for the use of inexperienced as well as seasoned programmers. To answer the

needs of programmers with varied backgrounds, the manual presents information of varying complexity,

especially in explaining the XSORT speciﬁcations. Most of this manual will be devoted to the ﬁve-part

speciﬁcations. The information will be presented under the following headings:

Overview of XSORT Speciﬁcations

shows you which columns of the speciﬁcations you must consider when you are preparing a sort.

Overviews serve as a quick reminder to those who are familiar with the program

Overview of Column Entries

lists all possible entries for each column in the speciﬁcations. These are brief descriptions and

explanations of the entries and their purposes. Column Entries

provide detailed discussions of the meanings of all possible entries, their relationships to other entries

within the speciﬁcations type and other entries in other speciﬁcation types. They are intended for new

users of XSORT.

Using XSORT Commands

gives you the various MPE commands necessary to use XSORT in job stream and interactive session, with

different arrangements of input and output ﬁles.

XSORT Applications

demonstrate how speciﬁcations are adapted to the requirements of particular jobs.

The more extensive the user's experience, the more readily will XSORT's versatility and efﬁciency become

apparent. The manual takes into consideration that some users will be employing the program for the ﬁrst

time. Information and instruction are provided for several levels of experience so that the new user should

be able to put XSORT to work after reading the manual.

In using XSORT, you may have programs and systems that interface with the Keyed Sequential Access

Method (KSAM/3000), the IMAGE Data Base Management System (IMAGE/3000), and the Data Entry

and Forms Management System (V/3000). For information about these systems, please read:

Manual Title

IMAGE/3000 Data Base Management Reference System

KSAM/3000 Reference Manual

VPLUS/3000 Reference Manual

Conventions

NOTATION DESCRIPTION

UPPERCASE Within syntax statements, characters in

uppercase must be entered in exactly the

order shown, though you can enter them in

either uppercase or lowercase. For

example:

SHOWJOB

Valid entries: showjob ShowJob

SHOWJOB

Invalid entries: shojwob ShoJob

SHOW_JOB

italics

Within syntax statements, a word in

italics represents a formal parameter or

argument that you must replace with an

actual value. In the following example,

you must replace

filename

with the

name

of the file you want to release:

RELEASE

filename

punctuation Within syntax statements, punctuation

characters (other than brackets, braces,

vertical parallel lines, and ellipses)

must be entered exactly as shown.

{ } Within syntax statements, braces enclose

required elements. When several elements

within braces are stacked, you must

select one. In the following example,

you must select ON or OFF:

{ON }

SETMSG {OFF}

[ ] Within syntax statements, brackets

enclose optional elements. In the

following example, brackets around ,TEMP

indicate that the parameter and its

delimiter are optional:

PURGE {

filename

} [,TEMP]

When several elements with brackets are

stacked, you can select any one of the

elements or none. In the following

example, you can select

devicename

deviceclass

or neither:

SHOWDEV [

devicename

]

[

deviceclass

]

[...] Within syntax statements, a horizontal

ellipsis enclosed in brackets indicates

that you can repeatedly select elements

that appear within the immediately

preceding pair of brackets or braces. In

the following example, you can select

itemname

and its delimiter zero or

times. Each instance of

itemname

must

preceded by a comma:

[

,itemname

][...]

If a punctuation character precedes the

ellipsis, you must use that character as

a delimiter to separate repeated

elements. However, if you select only

one element, the delimiter is not

required. In the following example, the

comma cannot precede the first instance

itemname

[

itemname

][,...]

|...| Within syntax statements, a horizontal

ellipsis enclosed in parallel vertical

lines indicates that you can select more

than one element that appears within the

immediately preceding pair of brackets or

braces. However, each element can be

selected only one time. In the following

example, you must select ,A or ,B or ,A,B

or ,B,A :

{,A}

{,B}|...|

If a punctuation character precedes the

ellipsis, you must use that character as

a delimiter to separate repeated

elements. However, if you select only

one element, the delimiter is not

required. In the following example, you

must select A or B or AB or BA. The first

element cannot be preceded by a comma:

{A}

{B}|,...|

... Within examples, horizontal or vertical

ellipses indicate where portions of the

example are omitted.

Å Within syntax statements, the space

symbol Å shows a required blank. In the

following example, you must separate

modifier

and

variable

with a

blank:

SET[(

modifier

)]Å(

variable

);

underlining User input is underlined. For

example:

PROMPT?response

In a syntax statement, brackets, braces

or ellipses are underlined if you must

enter them. For example:

COMMAND

[[

ParameterA

] ] =

ParameterB

Conventions (continued)

NOTATION DESCRIPTION

shading Within an example of interactive dialog,

shaded characters indicate user input or

responses to prompts. In the following

example, OMEGA is the user's response to

the NEW NAME prompt:

NEW NAME? OMEGA

The symbol indicates a key on the

terminal's keyboard. For example, CTRL

indicates the Control key.

CTRL

char

CTRL

char

indicates a control

character.

For example, CTRLY means you have to

simultaneously press the Control key and

the Y key on the keyboard.

base prefixes The prefixes %,#, and $ specify the

numerical base of the value that follows:

num

specifies an octal number.

num

specifies a decimal number.

num

specifies a hexadecimal

number.

When no base is specified, decimal is

assumed.

1- 11

2 Introduction

Hewlett-Packard's Extra Function Sort for RPG/XL, hereaft er referred to as XSORT, enables users to

rearrange data in their ﬁles, drop records from their ﬁles, and reformat records, as shown in ﬁgure 1-1.

XSORT runs on the MPE XL computer system and is primarily used in conjunction with the RPG

programming language. Its origin was the unsupported utility SORT3 which was designed to perform

most of the functions of IBM's System/3 $DSORT and System/34 #GSORT. Similarities and differences are

covered in appendix A.

Figure 1-1. Uses of XSORT

1- 12

Characteristics of XSORT:

In extending and enhancing your sort capabilities, XSORT:

• Uses from one to nine input files.

• Employs multiple logical criteria to select records from MPE (disk and non-disk) and KSAM files, so you

can process a subset of your input records.

• Builds a different sort key for each type of record using input record fields and forced control fields. This

facilitates the input of files with different data structures.

• Reformats each type of record upon output to give you a choice of record layouts.

• Can perform a count-only pass on the input files. This permits you to conduct a preliminary search of

your records or provide statistics on selected subsets of records.

How XSORT Works

XSORT follows a logical sequence in performing a sort. This sequence is described below:

1 XSORT reads a record from the input file.

2 XSORT checks your specifications to make sure the record is one you want to sort. You may not

wish to sort all the records in the file you have specified.

3 XSORT builds a work record containing sort control fields and data fields. It also formats the data

portion according to your specifications. Work record formatting is important because it controls

the format of your output.

4 XSORT submits the work records to the SORT subsystem for sorting.

5 XSORT retrieves records from SORT after sorting is complete.

6 XSORT writes records into the output file, retaining or dropping control fields, according to your

specifications

NOTE Control fields are input fields whose characteristics are used as a basis for the com-

parisons required by the sort. Control fields are discussed in detail in the section on

Field Descriptions. (See chapter 6.)

-------------------------------------------------------

| | | |

| Control field | Data | Control field |

| A | | B |

| | | |

-------------------------------------------------------

1 10 11 29 30 36

Suppose that you wanted to rearrange the input ﬁle above because a proposed sort job requires the

following changes:

1 Change the contents of positions 30 through 36 placed in positions 1 through 7 of the work record.

2 Change the contents of positions 1 through 10 of the input file placed in positions 8 through 17 of

the work file.

3 Change the contents of positions 11 through 29 of the input record placed in positions 18 through

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