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1994-01-05
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LSORT 3.51 (C) Copyright London Computing, 1983-1993.
All rights reserved.
LSORT is a general purpose sort/merge utility written in Microsoft C
6.0 for DOS 3.30 and above and OS2 1.2 and above written as a family
mode application. It runs on IBM PCs and compatibles with at least
512KB and either two floppy disks or a fixed disk.
LSORT is User Supported Software, if this program proves useful, please
make a contribution ($35 suggested) to:
London Computing, P.O. Box 696 Cherry Hill, NJ 08003
Anyone sending a contribution will receive a disk containing the source code
to LSORT as well as a copy of the LSRT sort filter. LSRT is similar to the
DOS SORT filter but works much faster and will sort on multiple fields.
You may make copies of this software and distribute to other users as long as
there is no charge or other consideration and this notice is not removed or
bypassed.
LSORT will sort MSDOS and OS2 files and dBase II and dBase III
databases. (dBase III memo files and FOXPRO memo files are not sorted
but .DBF files will be sorted.) Each file may be sorted using 1 to 32
sort fields. The file to be sorted may contain either fixed length
records, variable length records or comma delimited records. Variable
length records are records ending with cr/lf. Comma delimited records
are variable length records where the fields are also variable length
and separated by a comma. Character fields may be enclosed in either
single or double quotes. It will merge up to 5 files using 1 to 32
sort fields. dBase databases may not be merged. Any field may be
sorted in either ascending or descending sequence. LSORT allows for
three user defined field types to be used: X,Y and Z. You must write
your own comparison subroutine to compare user defined fields.
The sort knows about: field type
binary fields (to 127 bytes) B
A binary field is compared left to right
based on value of the code in each field
(0-255). It is useful for comparing strings
where binary zeros are embedded and for
comparing IBM Mainframe stype binary numbers
packed decimal fields (1-8 bytes) Stored as on P
IBM Mainframe computers. Each digit position
is stored in 4 bits as a binary value between
0 and 10. The digits are stored left to
right with the rightmost position containing
a sign, 0x0D for negative, 0x0C or 0x0F for
positive. A packed decimal field can store
between 1 and 15 digits depending on the
length of the field. If an invalid sign
field is specified, the sort won't produce
what you would expect. Packed decimal values
are only meaningful in fixed length record.
character fields (to 127 bytes) C
character fields compare up to the first
binary zero in the field following C
language conventions.
upper case character fields (sort fields are U
translated to upper case before compare)
2 byte integers in internal format I
4 byte integers in internal format L
floating point numbers (ieee) F
double precision floating point (ieee) D
zoned decimal numbers N
(Text format numbers, Decimals are allowed)
(LSORT now supports scientific notation as)
(well, using E notation, eg. .98 == 9.8E-1)
(xBase N and F fields are sorted as type N)
1 byte logical fields (dBase II or III) T
User defined field type X X
User defined field type Y Y
User defined field type Z Z
A zoned decimal number is stored as a character string and may contain
leading and trailing spaces, minus sign, decimal point and digits.
NOTE: zoned decimal numbers and comma delimitted files sort very slowly!
The only reasonable field types for comma delimited files are C or N. LSORT
will accept other field types, but the results are undefined.
LSORT will prompt you for all parameters and file names or you may specify
some or all of the parameters on the command line when you invoke the sort.
The maximum record length is 4096 bytes. Files will be sorted in memory if
possible.
Files larger than available memory are sorted in pieces and then merged
together. If you have a floppy only system, you should have LSORT on the A
drive and the file to be sorted on the B drive. Place a copy of LSORT on an
otherwise empty disk and use as your A drive. You may need a formatted empty
disk for work files on the B drive.
SYNTAX:
LSORT [-h | -m] -- will prompt you for all necessary information.
or
LSORT [-h | -m] sort specifications--will take the specification specified and
prompt you for any others.
Specify -h if you are using a fixed (hard disk) for your output and
merge files. This will eliminate mount messages. This is the default
for LSORT 3.01 and above. Specify -m if you are using mountable disks
(floppy, Bournouli, etc.). This allows you to mount disks to contain
work files and output files.
or
LSORT -R -- will restart a sort.
Sort Specifications:
You will be asked to specify either a SORT or MERGE operation.
If you ask for a SORT, you may tell LSORT to use either a QUICKSORT or
HEAPSORT for internal sorting. You will also be asked to specify two
devices to hold merge files if any are needed. Merge files may be placed on
floppy disk, hard disk or RAM disk. The specified drive must be large
enough to hold the entire input file. You will be given the opportunity to
change floppy disks if desired before each merge drive is used and before
the output file is written. The program will wait for you to press 'Y'
before proceeding. This is not really a problem for unattended sorting
if you use redirected input or specify all prompts on the command line.
If you specify SORT or MERGE you will be prompted for your input file(s) and
output file as well as the definition of the key fields to be used in the
comparisons. Fields are specified by their starting position and length.
The types of fields have been listed above.
The sort specifications may be entered on the command line in the order
requested by LSORT. Each parameter should be separated from the others with
one or more spaces. You will not be prompted for any specification on the
command line (including requests to change disks).
The sort will ask for the following information in the order shown:
Type of Sort: You may reply:
S -- for QUICKSORT
H -- for HEAPSORT
Merge Drive 1: You may reply with any drive letter, although it is best to
specify a fixed disk (if any).
Merge Drive 2: This should be different from drive 1 if you are using
floppy disks, but should be a fixed disk if you have one.
Name of input file: You may specify any name including drive letter and
path. Specify :X to use a user specified input routine.
Name of output file: See above. Specify :X to use a user specified output
routine.
File Type (Unless you are sorting a dBase file): You may reply F for a
fixed length file (all records are the same length), V for a varying
length file (records must end with CR LF.) or D for comma delimited files.
If you entered 'F' for a fixed file, you will be prompted for the record
length.
You will then be prompted for field definitions. Each field definition has
four parts: starting position (from 1) or starting field (delimited files)
field length (in bytes) (no prompt for delimited files)
field type (See above list of valid types)
sort order (A--Ascending, D--Descending)
In order to work as efficiently as possible, LSORT does not check the
starting position of a field against the actual length of a record. If some
field starts past the end of a record (e.g. sort field 1 starts in column 10
but the record is only 8 bytes long), the results will be undefined and most
certainly not what you want. Please be careful.
Enter a '0' for the starting position to end the prompt for field
definitions.
If you are sorting a dBase file, you will see a list of fields. You may
specify a field by name, in which case you will only be prompted for the
sort order or you may enter starting position, length, type and order as
above.
Following the '0' that ends field definitions, you may specify a series of
'Y's if you know that the disks currently mounted will hold merge work files
and the output file. These may be omitted if you specified the -H flag.
example 1:
Sort file test.dat on positions 1-5,char,ascending and 6-7, binary integer,
descending. Use drive C for the work files and put the sorted file in
test.srt.
Issue the following command:
LSORT S C C test.dat test.srt V 1 5 C A 6 2 H D 0 Y Y Y
| | | | | | |_____| |_____| | | | |
| | | input output F | | | | | response to mount
| | | file file i sort sort | | | output file message.
| | | name name l field 1 field 2 | | |
| | | e starts starts | | response to mount 2nd
| | merge drive 2 at byte at byte | | merge volume message.
| | T 1, is 5 6, is 2 | |
| merge drive 1 y byte byte | response to mount first
| p char- long | merge volume message.
sort using e acter integer |
quicksort string sorted ends list of sort fields.
ascend- descend-
ing ing
Merge Specification:
Enter 'M' to indicate the merge operation.
You will be asked to enter the number of files to be merged followed by 1-5
files to be merged. They are entered one at a time.
You will be asked to enter a file type, output file and a field list as
above.
example:
Merge files t1.dat t2.dat and t3.dat on positions 4-7 defined as a character
field, ascending.
LSORT M 3 t1.dat t2.dat t3.dat test.mrg V 4 4 c a 0 y y
| | | | | | | |_____| | |_|
| | input input input output | | | |
| | file 1 file 2 file 3 file | merge | response to mount
| | | field | messages
| merge 3 files | 1 |
| | end of list of merge
do a merge file fields
type
Restarting:
If a sort stops in the middle due to lack of space or is stopped by you by
pressing ^BREAK, it may be restarted by issuing the LSORT -R command
providing the dataset(s), SORTPARM.DAT and (DB3PARM.DAT for dBase III files
only) are still available and further providing all files LSMERGE?.DAT are
still available. The sort will be restarted at the beginning of the LSSORT
phase (where the input file is read and sorted) or at the beginning of an
LSMERGE pass, where several partially sorted files are combined.
User Exits:
You may define your own user exits to read and write data and you may define
your own compare routines for the standard field types or for user defined
field types. These routines must be written in Microsoft C 6.0 or in
any other language that can be linked to Microsoft C 6.0.
User input: (Available for Sorting Only)
Specify :X as the name of the input file. LSORT uses a routine named USERIP
to read the records to be sorted. You may write your own version of USERIP
and link it with LSORT to create a custom version containing your own input
routine.
USERIP is used as follows:
int l,userip();
char buffer[...];
l = userip(buffer);
USERIP must return the length of the record read which must be <= 4096 or -1
for end of file. If you have specified V type files, USERIP must return a
string ending with a '\0'. The string length must include the trailing '\0'.
User Output:
Specify :X as the name of the output file. LSORT uses a routine called
USEROP to write to the :X file. You may write your own user output routine
to be used to write the final sorted or merged output by creating a custom
version of USEROP and relinking LSORT to create a custom LSORT. USEROP works
as follows:
int buflen;
char buffer[...];
userop(buffer,buflen); /* userop must write buflen bytes from buffer */
/* buflen == 0 means that you want to write a
0 terminated string */
userop(NULL,-1); /* userop must perform end of file processing */
Sample versions of userip and userop appear below:
/* Userip to return a varying length string */
#define CPMEOF 26
#include "stdio.h"
userip(s)
char *s;
{
static char firsttime = 1;
static int inchan;
char *fgets();
int l;
/* input is string buffer, max length 4k, 4k always available */
/* this routine must return length of string or EOF if end of file */
/* example follows: (Note length of string includes 0 byte at end */
if (firsttime) {
firsttime=0;
inchan=fopen("usertest.dat","r");
}
if (fgets(s,4096,inchan))
return strlen(s)+1;
else
return EOF;
}
/* Userip to return a fixed length string */
#define CPMEOF 26
#define STRLEN 128
#include "stdio.h"
userip(s)
char *s;
{
static char firsttime = 1;
static int inchan;
char *fgets();
int c,l;
/* input is string buffer, max length 4k, 4k always available */
/* this routine must return length of string or EOF if end of file */
/* example follows: (Note length of string includes 0 byte at end */
if (firsttime) {
firsttime=0;
inchan=fopen("usertest.dat","r");
}
if ((l=read(inchan,buffer,STRLEN)) == STRLEN)
return STRLEN;
else
return EOF;
}
userop(s,l)
char *s;
int l;
{
/* s is string to write, l is length or 0 if 0 terminated or -1 for close */
static char firsttime = 1;
static int otchan;
if (firsttime) {
firsttime = 0;
otchan = fopen("usertest.srt","w");
}
if (l == -1 || s == NULL)
fclose(otchan);
else if (l) /* write an F type record */
while(l--) fputc(*s++,otchan);
else fputs(s,otchan); /* write a V type record */
}
User Compare Routines:
You may define up three user defined fields: X,Y,Z. You must write a compare
routine for each field type used. The routine names are:
sxcmp -- for field type X.
sycmp -- for field type Y.
szcmp -- for field type Z.
The compare routines are called with three arguments, the address of the
first field, the address of the second field and the field length. The
routine must return 1 if field 1 < field 2, 0 if field1 == field2 and -1 if
field1 > field2.
Sample routines are shown below:
sxcmp(a,b,l)
long int *a,*b;
int l;
{ /* this routine compares two long integers */
long int c;
c = *a - *b;
return c <0 ? -1 : c == 0 ? 0 : 1;
}
sycmp(a,b,l)
int *a,*b;
int l;
{ /* this routine compares two integers (2 bytes) */
int c;
c = *a - *b;
return c <0 ? -1 : c == 0 ? 0 : 1;
}
szcmp(a,b,l)
float *a,*b;
int l;
{ /* this routine compares two floating numbers */
float c;
c = *a - *b;
return c<0 ? -1 : c == 0 ? 0 : 1;
}
Linking user written routines:
For MicroSoft C.
Compile your user written routines using Microsoft C 6.0 to create .OBJ
files. Use the -Lp -Fb options. Modify the file lsort.crf to include
your routines before LSORTCMP:
lsort.obj +
<=== place your routines here
lsortcmp.obj +
lsortdbf.obj +
lsortio.obj +
lsortprm.obj +
lsortqk.obj +
lsortsub.obj +
lssort.obj +
lsuser.obj +
lsmerge.obj +
Re-link LSORT with the following statement:
LINK /stack:4096 @lsort.crf;
BIND LSORT
LSMENU
Enter LSMENU instead of LSORT for the menu driven interface.
LSMENU will display an SAA like menu that makes it easier to use LSORT.
The menuing system uses drop down menus that allow you to:
o Specify the operations (Sort / Merge) to be performed.
o Specify Work Drives
o Specify or Pick Input File(s) using a 'point and shoot' interface.
o Specify or Pick the Output file.
o Select the records type: (Fixed, Variable, Delimitted or dBase)
o Specify the Sort Fields using a context sensitive assistant that will
either display the names of dBase fields or display a file and let you
mark fields.
o Save a sort specification in a file for quick re-use.
o Load a sort specification.
Within LSMENU, the following conventions apply:
You select an option by typing the highlighted letter in the option name or
by moving the cursor to that option using the arrow keys, then pression
Enter.
You quit any menu option by pressing ESC. You may use ESC to exit the
program if desired.
Selectable options appear as blue on white with one blue letter highlighted.
Unavailable options appear as bright white on white. An unavailable option
becomes available as a by product of selecting other options.
When LSMENU is entered, the following menu is displayed:
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
└────────────────────────────────┌───────────────┐─────────────────────────────┘
│ HeapSort │
│ QuickSort │
│ Merge [ ] │
│ Work Drive │
└───────────────┘
The Sortfield and Record Options will display as white on white. This color
combination indicates that the option is not currently available.
The Options menu drops down automatically so that you select the type of Sort /
Merge to perform: Heap, Quick or Merge (2-5 files). When you make your sel-
ection, the Options window closes automatically and the Record and Sortfield
options appear as blue on white, indicating that they are available. If you
wish to close this or any menu without selecting anything, press ESC.
You may then select any other option as desired. The recommended sequence is
File -- Input, File -- Output, Record, Sortfield and File -- Go.
The following main menu options are available:
File, Record, Sortfield, Options, Help and About.
File Menu Option
----------------
The File option displays the following:
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
└─┌────────┐───────────────────────────────────────────────────────────────────┘
│ New │
│ Load │
│ Save │
│ Input │
│ Output │
│ Go │
│ Quit │
└────────┘
New
---
Select New to clear the sort specification. This resets any previous
specifications and allows you to start over.
Load
----
Select Load to use an existing sort specification that was saved by the
Save option. When Load is selected, the following is displayed:
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
└─┌────────┐───────────────────────────────────────────────────────────────────┘
│ New │┌───────────────────── Load Control File ──────────────────────────┐
│ Load ││ Current Selection: │
│ Save ││ │
│ Input ││ ▄▄▄▄▄▄▄▄▄▄▄▄▄ ▄▄▄▄▄▄ ▄▄▄▄▄▄▄▄ │
│ Output ││ █Select File█ █ Ok █ █Cancel█ │
│ Go ││ ▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀ │
│ Quit │└──────────────────────────────────────────────────────────────────┘
└────────┘
┌────────────────────────File Selector ──────────────────────────┐
│Directory of: │
│D:\MSC\LSORTX3\*.LSC │
│────────────────────────────────────────────────────────────────│
│ <KEY-IT-IN> .. │
│ <-A-> TEST.LSC │
│ <-B-> │
│ <-C-> │
│ <-D-> │
│ <-E-> │
│ <-F-> │
│ <-G-> │
F1=HELP──────────────────────────────────────────────────────────┘
Two new windows are displayed, the Load Control File window and the File
Selector windows. The File Selector window will be active, with any files
of type .LSC displayed from the current directory. You can use the file
selector to move to any drive or directory and pick a file to be used as the
control file or you may select <KEY-IT-IN> to enter a filename directly. More
information about the File Selector is available in file SELEFILE.DOC.
To Select a file, move the cursor to the desired file and press Enter.
To Select a drive, move the cursor to a drive indicator, e.g. <-C->, and
press Enter.
To Select a directory move the cursor to a directory entry, e.g. .., and
press Enter.
To Quit without selecting a file, press ESC.
Pressing Enter or ESC closes the File Selector window and displays the
selected file, if any, under Current Selection in the Load Control File
window. The Load Control File window has three options: Select, Ok and
Cancel. Choose Select to redisplay the File Selector. Choose Ok to
approve the Current Selection and load the control file or choose Cancel
to return to the Files Menu without selecting a control file.
Selecting a control file that does not contain control information will
seriously confuse LSMENU. Don't do it.
If you choose OK, the control file will be loaded and your input file,
output file, Options, Record and Sortfield menus will be set to the values
that they had when the control file was created.
Save
----
Select Save to save your current specifications as a control file which can
be loaded from a subsequent invokation of LSMENU. The following is displayed:
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
└─┌────────┐───────────────────────────────────────────────────────────────────┘
│ New │┌───────────────────── Save Control File ──────────────────────────┐
│ Load ││ Current Selection: │
│ Save ││ │
│ Input ││ ▄▄▄▄▄▄▄▄▄▄▄▄▄ ▄▄▄▄▄▄ ▄▄▄▄▄▄▄▄ │
│ Output ││ █Select File█ █ Ok █ █Cancel█ │
│ Go ││ ▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀ │
│ Quit │└──────────────────────────────────────────────────────────────────┘
└────────┘
┌────────────────────────File Selector ──────────────────────────┐
│Directory of: │
│C:\TMP\*.* │
│────────────────────────────────────────────────────────────────│
│ <KEY-IT-IN> .. LSORT.EXE LSORTPRM.OBJ │
│ <-A-> DUFI.DOC LSORT.HLP LSORTQK.OBJ │
│ <-B-> DUFI.EXE LSORT.OBJ LSORTSUB.OBJ │
│ <-C-> DVINT.OBJ LSORT311.TXT LSORTX3.EXE │
│ <-D-> FILELIST.TXT LSORTCMP.OBJ LSRTOS2.EXE │
│ <-E-> LSMENU.EXE LSORTDBF.OBJ LSSORT.OBJ │
│ <-F-> LSMERGE.OBJ LSORTIO.OBJ LSUSER.OBJ │
│ <-G-> LSORT.CRF LSORTLNK.BAT SCRSUBS.OBJ │
F1=HELP──────────────────────────────────────────────────── PgDn ┘
The Save Control File window shows the current control file, if any. The File
Selector window shows all the files in the current directory. You may select
and existing file to save the sort specification to or use <KEY-IT-IN> to enter
a new file to contain the sort specification. If you select an existing file,
it will be overwritten with the sort specification and its old contents will
be gone. BE CAREFUL.
As above, once a file name has been entered, you may choose Select, Ok or
Cancel from the Save Control File window. Ok will save the sort specification.
Cancel will return to the File menu without saving and Select will redisplay
the File Selector.
Input
-----
This option is only activated if HeapSort, QuickSort or Merge has been selected
from the Options Menu. When you are sorting, the following will be displayed:
Input-Sort
----------
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
└─┌────────┐───────────────────────────────────────────────────────────────────┘
│ New │
│ Load │┌───────────────────── Select Input File ──────────────────────────┐
│ Save ││ Current Selection: │
│ Input ││ │
│ Output ││▄▄▄▄▄▄▄▄▄▄▄▄▄ ▄▄▄▄▄▄ ▄▄▄▄▄▄▄▄│
│ Go ││█Select File█ █ Ok █ █Cancel█│
│ Quit ││▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀│
└────────┘└──────────────────────────────────────────────────────────────────┘
┌────────────────────────File Selector ──────────────────────────┐
│Directory of: │
│D:\MSC\LSORTX3\*.* │
│────────────────────────────────────────────────────────────────│
│ <KEY-IT-IN> .. LSMENU.C LSORTX3.H │
│ <-A-> CDRIVER.C LSORT.H LSORTX3.MAK │
│ <-B-> CDRIVER.OBJ LSORT311.TXT LSORTX3.OBJ │
│ <-C-> CSEXTERN.H LSORTBAK.ZIP LSORTX3.OLD │
│ <-D-> CSUBS.C LSORTOS2.ZIP LSORT_DF.C │
│ <-E-> CSUBS.OBJ LSORTX3.C LSORT_DF.OBJ │
│ <-F-> DUFI$$$$.$$$ LSORTX3.CRF LSORT_FT.C │
│ <-G-> DUFI.C LSORTX3.EXE LSORT_FT.OBJ │
F1=HELP──────────────────────────────────────────────────── PgDn ┘
Use the File Selector as above to choose a file to sort and return to the
Select Input File window where you may choose Ok, to set the input file to
your selection, Cancel to quit without selecting an input file or Select File
to redisplay the File Selector.
Input - Merge
-------------
If you are merging, the following is displayed:
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
└─┌────────┐───────────────────────────────────────────────────────────────────┘
│ New │
│ Load │┌──────────────────────Select Merge Files──────────────────────────┐
│ Save ││# Current Selection: │
│ Input ││1 │
│ Output ││2 │
│ Go ││3 │
│ Quit ││4 │
└────────┘│5 │
│ Select File Number: │
│ ▄▄▄▄▄ ▄▄▄▄▄ ▄▄▄▄▄ ▄▄▄▄▄ ▄▄▄▄▄ ▄▄▄▄▄▄ ▄▄▄▄▄▄▄▄ │
│ █ 1 █ █ 2 █ █ 3 █ █ 4 █ █ 5 █ █ Ok █ █Cancel█ │
│ ▀▀▀▀▀ ▀▀▀▀▀ ▀▀▀▀▀ ▀▀▀▀▀ ▀▀▀▀▀ ▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀ │
└──────────────────────────────────────────────────────────────────┘
Choose the merge file to select by selecting menu options 1,2,3,4 or 5. If you
select any of these options, the File Selector will be displayed and you can
use it to pick the merge file. Repeat until all necessary merge files have
been selected, then choose Ok to return to the File menu.
Output
------
Use this option to specify the name of your output file which will contain
the sorted or merged data. When this option is selected, the following is
displayed:
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
└─┌────────┐───────────────────────────────────────────────────────────────────┘
│ New │
│ Load │
│ Save │┌───────────────────── Select Output File ─────────────────────────┐
│ Input ││ Current Selection: │
│ Output ││ │
│ Go ││ ▄▄▄▄▄▄▄▄▄▄▄▄▄ ▄▄▄▄ ▄▄▄▄▄▄▄▄ │
│ Quit ││ █Select File█ █Ok█ █Cancel█ │
└────────┘│ ▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀ ▀▀▀▀▀▀▀▀ │
└──────────────────────────────────────────────────────────────────┘
┌────────────────────────File Selector ──────────────────────────┐
│Directory of: │
│C:\TMP\*.* │
│────────────────────────────────────────────────────────────────│
│ <KEY-IT-IN> .. LSORT.EXE LSORTPRM.OBJ │
│ <-A-> DUFI.DOC LSORT.HLP LSORTQK.OBJ │
│ <-B-> DUFI.EXE LSORT.OBJ LSORTSUB.OBJ │
│ <-C-> DVINT.OBJ LSORT311.TXT LSORTX3.EXE │
│ <-D-> FILELIST.TXT LSORTCMP.OBJ LSRTOS2.EXE │
│ <-E-> LSMENU.EXE LSORTDBF.OBJ LSSORT.OBJ │
│ <-F-> LSMERGE.OBJ LSORTIO.OBJ LSUSER.OBJ │
│ <-G-> LSORT.CRF LSORTLNK.BAT SCRSUBS.OBJ │
F1=HELP──────────────────────────────────────────────────── PgDn ┘
The File Selector window is active and you can pick an existing file to hold
the output of the sort or merge or you can choose <KEY-IT-IN> to enter a new
file name. If you select an existing file, it will be overwritten when the
sort / merge is run. BE CAREFUL. After specifying a file, the Select Ouput
File window becomes active and you may choose Ok to accept the file name,
Cancel to quit without accepting the file name or Select File to redisplay
the File Selector.
GO
--
Select this option to perform the sort or merge. This option should be
selected ONLY after specifying HeapSort, QuickSort or Merge, Input File(s),
Output File(s), Record Type and Sortfields. If you select GO before all of
the necessary information has been specified, an error message will be dis-
played showing those pieces of information that are missing. The message
will be similar to that shown below:
┌─────────────────────────────────────────────────────────┐
│ │
│ Unable to RUN Sort because: │
│ │
│ Sort or Merge not selected on Options Screen. │
│ No sort input file was specified. │
│ No output file was specified. │
│ No sort/merge fields were defined. │
│ │
│ ▄▄▄▄ │
│ █Ok█ │
│ ▀▀▀▀ │
└─────────────────────────────────────────────────────────┘
If everything has bee specified, the menu will disapear and standard LSORT
output will be displayed, the file(s) will be sorted or merged and control
will return to the standard DOS prompt.
Quit
----
Select this option to quit the menu system without running a Sort. You will
be given a chance to change your mind when the following is displayed:
┌───────────────┐
│ Quit LSMENU ? │
│ ▄▄▄▄ ▄▄▄▄▄▄▄▄ │
│ █Ok█ █Cancel█ │
│ ▀▀▀▀ ▀▀▀▀▀▀▀▀ │
└───────────────┘
If you select Ok, you will exit to the command line. If you select Cancel,
you will return to the File Menu.
Record Menu Option
------------------
The record option allows you to pick the type of record to be sorted. The
following will be displayed:
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
└─────────┌───────────────┐────────────────────────────────────────────────────┘
│ Fixed 0 │
│ √ Variable │
│ Delimited │
│ dBase │
└───────────────┘
Use this menu to pick the record type. The default type is Variable and is
shown marked with a check. Variable records are variable length, contain
ASCII characters only and are terminated with a CR-LF. To select variable,
type V or move the cursor to the variable line and press Enter. If the check
mark is on a different type it will be moved to the Variable line. Press
ESC to return to the main menu.
You may also select Fixed, Delimited or dBase. If you select Fixed, you will
be prompted for the number of characters in the record. Enter the number and
press Enter. (Fixed records are all the same length. You must tell the LSMENU
what that length is.) The check mark will move to the Fixed Line and the
record length will be displayed next to the word fixed. Press ESC to return
to the main menu.
If you select Delimited (fields are comma delimitted) or dBase, the check mark
will move to the appropriate line. Press ESC to return to the main menu.
SortField Menu Option
---------------------
Select Sortfield to specify the fields to sort on. You should specify
Record Type before selecting Sortfields. A different menu is displayed
depending on the record type.
In all cases, you must first specify a sort field by moving the blue
cursor to the desired field number. You may then Add a new field, pushing
all the current specification and subsequent specifications down one slot,
Delete a field, moving following specifications up one slot or Edit the field.
To quit the SortFields Menu, press ESC.
Fixed or Variable Records
-------------------------
If the record type is Fixed or Variable the following screen is displayed with
a high lighted cursor set to Sort Field 1.
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
├──────╥────────┬──────┬─────┬────┬─────┬──────╥────────┬──────┬─────┬────┤────┘
│Sort ║Starting│Field │Field│Asc/│ │Sort ║Starting│Field │Field│Asc/│
│Field ║Position│Length│Type │Dec.│ │Field ║Position│Length│Type │Dec.│
╞══════╬════════╪══════╪═════╪════╡ ╞══════╬════════╪══════╪═════╪════╡
│ __1_ ║ 0 │ 0 │ │ │ │ 17 ║ 0 │ 0 │ │ │
│ 2 ║ 0 │ 0 │ │ │ │ 18 ║ 0 │ 0 │ │ │
│ 3 ║ 0 │ 0 │ │ │ │ 19 ║ 0 │ 0 │ │ │
│ 4 ║ 0 │ 0 │ │ │ │ 20 ║ 0 │ 0 │ │ │
│ 5 ║ 0 │ 0 │ │ │ │ 21 ║ 0 │ 0 │ │ │
│ 6 ║ 0 │ 0 │ │ │ │ 22 ║ 0 │ 0 │ │ │
│ 7 ║ 0 │ 0 │ │ │ │ 23 ║ 0 │ 0 │ │ │
│ 8 ║ 0 │ 0 │ │ │ │ 24 ║ 0 │ 0 │ │ │
│ 9 ║ 0 │ 0 │ │ │ │ 25 ║ 0 │ 0 │ │ │
│ 10 ║ 0 │ 0 │ │ │ │ 26 ║ 0 │ 0 │ │ │
│ 11 ║ 0 │ 0 │ │ │ │ 27 ║ 0 │ 0 │ │ │
│ 12 ║ 0 │ 0 │ │ │ │ 28 ║ 0 │ 0 │ │ │
│ 13 ║ 0 │ 0 │ │ │ │ 29 ║ 0 │ 0 │ │ │
│ 14 ║ 0 │ 0 │ │ │ │ 30 ║ 0 │ 0 │ │ │
│ 15 ║ 0 │ 0 │ │ │ │ 31 ║ 0 │ 0 │ │ │
│ 16 ║ 0 │ 0 │ │ │ │ 32 ║ 0 │ 0 │ │ │
└──────╨────────┴──────┴─────┴────┘ └──────╨────────┴──────┴─────┴────┘
ESC=Exit, F1=Help, ENTER=Edit Field, INS=Insert Field, DEL=Delete Field
You may specify up to 32 different fields for sorting or merging. A sort field
specification consists of four entries, the field starting position (relative
to 1), the field length, the field type and the sort order. To select a sort
field, move the cursor to that field number. You may now press Enter to edit
that sort field, Del to delete that sort field or Ins to insert a new field.
Deleting a sort field will move all following fields up one slot. Inserting
a sort field moves all fields down one slot and creates an empty specification
at the selected field.
Editing a sort field allows you to enter or change starting position, field
length, field type and sort order.
The four parts of a sort field specification consist of:
o Starting Position, which indicates where the field starts relative to the
first character in the record. Position 1 is the first charactter, position 2
the second and so forth.
o Field Length indicates how many characters or bytes are in the field.
o Field Type indicates the type of field. If you know the field type, just
enter the correct code. If you don't know the field type, press F1 and the
following will pop up:
╒═══════Select Field Type══════╕ Choose the desired field type by moving
│Character (case is signficant)│ the cursor and pressing enter or by
│Double floating point │ pressing the first letter on the line.
│Floating point (single) │
│Integer (16 bit signed) │ Once selected, the pop up window will
│Long (32 bit signed integer) │ close and the desired code will be
│Numeric (ASCII text) │ shown in the input field.
│True/false (dBase logical) │
│Upper (character case ignored)│
│Packed decimal │
│Binary │
│X (user defined field type X) │
│Y (user defined field type Y) │
│Z (user defined field type Z) │
└──────────────────────────────┘
o Sort Order (Asc/Dec) indicates whether the field should be sorted in
ascending or descending sequence. If you leave it flank, press F1 or enter
and invalid menu, a small pop up appears showing good values.
If you press F1 while in the Starting Position or Field Length columns, a
special field selector window will be displayed. You can use this window
to display the first few lines of the file to be sorted. You can display
data in text or dump format. The window is shown below:
╔══════════════════════════════════════════════════════════════════════════════╗
║LSORTX3.MAK R1 , C1 ║
║------------------------------------------------------------------------------║
║PROJ =LSORTX3 ║
║DEBUG =1 ║
║CC =cl ║
║CFLAGS_G = /AS /W3 ║
║------------------------------------------------------------------------------║
║ PgUp PgDn Home End, ^Home-Top, ^End-Bot, F1-Help, F3-Hex, F5-Mark, ESC-Quit║
╚══════════════════════════════════════════════════════════════════════════════╝
You can position to any record using the Up arrow, Down arrow, PgUp and PgDn.
You can position to any character in the record using the Left arrow and Right
arrow. In order to mark a field, use the Left and Right arrows to position to
the first character of the field, then press F5. Continue using the Right
arrow to mark each charcter in turn. Marked characters are shown in reverse
video. When you have marked the last character of the field, press Enter.
You may perform this operation as many times as you desire. Only the last
mark is remembered. Press ESC to return to the Sortfields screen. The start-
ing position and field length will be entered into the screen.
Delimitted Records
------------------
If your record type is Delimited, the following will be displayed:
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
├──────╥───────┬─────┬────┬─────────────┬──────╥───────┬─────┬────┬────────────┘
│Field ║Field │Field│Asc/│ Delimitted │Field ║Field │Field│Asc/│
│Number║Pos'n │Type │Dec.│ File │Number║Pos'n │Type │Dec.│
╞══════╬═══════╪═════╪════╡ ╞══════╬═══════╪═════╪════╡
│ 1 ║ 0│ │ │ │ 17 ║ 0│ │ │
│ 2 ║ 0│ │ │ │ 18 ║ 0│ │ │
│ 3 ║ 0│ │ │ │ 19 ║ 0│ │ │
│ 4 ║ 0│ │ │ │ 20 ║ 0│ │ │
│ 5 ║ 0│ │ │ │ 21 ║ 0│ │ │
│ 6 ║ 0│ │ │ │ 22 ║ 0│ │ │
│ 7 ║ 0│ │ │ │ 23 ║ 0│ │ │
│ 8 ║ 0│ │ │ │ 24 ║ 0│ │ │
│ 9 ║ 0│ │ │ │ 25 ║ 0│ │ │
│ 10 ║ 0│ │ │ │ 26 ║ 0│ │ │
│ 11 ║ 0│ │ │ │ 27 ║ 0│ │ │
│ 12 ║ 0│ │ │ │ 28 ║ 0│ │ │
│ 13 ║ 0│ │ │ │ 29 ║ 0│ │ │
│ 14 ║ 0│ │ │ │ 30 ║ 0│ │ │
│ 15 ║ 0│ │ │ │ 31 ║ 0│ │ │
│ 16 ║ 0│ │ │ │ 32 ║ 0│ │ │
└──────╨───────┴─────┴────┘ └──────╨───────┴─────┴────┘
ESC=Exit, F1=Help, ENTER=Edit Field, INS=Insert Field, DEL=Delete Field
You select fields to edit, insert or delete as described above. You may specify
up to 32 different fields for sorting or merging. Field Pos'n indicates which
comma seperated field is to be sorted. Fields are numbered from 1. Field Type
indicates the type of field. If you know the field type, just enter the
correct code. If you don't know the field type, press F1 and the following
will pop up:
╒═══════Select Field Type══════╕ Choose the desired field type by moving
│Character (case is signficant)│ the cursor and pressing enter or by
│Double floating point │ pressing the first letter on the line.
│Floating point (single) │
│Integer (16 bit signed) │ Once selected, the pop up window will
│Long (32 bit signed integer) │ close and the desired code will be
│Numeric (ASCII text) │ shown in the input field.
│True/false (dBase logical) │
│Upper (character case ignored)│ The Asc/Dec field should be set to A
│X (user defined field type X) │ to sort from low to high or D to sort
│Y (user defined field type Y) │ from high to low. If you enter anything
│Z (user defined field type Z) │ else a small pop up window will appear,
└──────────────────────────────┘ showing the two valid choices.
If you press F1 while in the Field Pos'n column, a special field selector
window will be displayed. You can use this window to display the first few
lines of the file to be sorted. You can display data in text or dump format.
The window is shown below:
╔══════════════════════════════════════════════════════════════════════════════╗
║LSORTX3.MAK R1 , C1 ║
║------------------------------------------------------------------------------║
║PROJ ,LSORTX3 ║
║DEBUG ,1 ║
║CC ,cl ║
║CFLAGS_G,/AS, /W3 ║
║------------------------------------------------------------------------------║
║ PgUp PgDn Home End, ^Home-Top, ^End-Bot, F1-Help, F3-Hex, F5-Mark, ESC-Quit║
╚══════════════════════════════════════════════════════════════════════════════╝
You can position to any record using the Up arrow, Down arrow, PgUp and PgDn.
You can position to any character in the record using the Left arrow and Right
arrow. In order to mark a field, use the Left and Right arrows to position to
the first character of the field, then press F5. Continue using the Right
arrow to mark each charcter in turn. Marked characters are shown in reverse
video. When you have marked the last character of the field, press Enter.
You may perform this operation as many times as you desire. Only the last
mark is remembered. Press ESC to return to the Sortfields screen. The start-
ing position and field length will be entered into the screen.
dBase Records
-------------
The following screen is displayed for dBase records.
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
├──────╥───────────┬──────┬─────┬────┬────┬──────╥───────────┬──────┬─────┬────┤
│Sort ║Field Name │Field │Field│Asc/│ d │Sort ║Field Name │Field │Field│Asc/│
│Field ║or Position│Length│Type │Dec.│ B │Field ║or Position│Length│Type │Dec.│
╞══════╬═══════════╪══════╪═════╪════╡ a ╞══════╬═══════════╪══════╪═════╪════╡
│ 1 ║ │ 0 │ │ │ s │ 17 ║ │ 0 │ │ │
│ 2 ║ │ 0 │ │ │ e │ 18 ║ │ 0 │ │ │
│ 3 ║ │ 0 │ │ │ │ 19 ║ │ 0 │ │ │
│ 4 ║ │ 0 │ │ │ F │ 20 ║ │ 0 │ │ │
│ 5 ║ │ 0 │ │ │ i │ 21 ║ │ 0 │ │ │
│ 6 ║ │ 0 │ │ │ l │ 22 ║ │ 0 │ │ │
│ 7 ║ │ 0 │ │ │ e │ 23 ║ │ 0 │ │ │
│ 8 ║ │ 0 │ │ │ │ 24 ║ │ 0 │ │ │
│ 9 ║ │ 0 │ │ │ │ 25 ║ │ 0 │ │ │
│ 10 ║ │ 0 │ │ │ │ 26 ║ │ 0 │ │ │
│ 11 ║ │ 0 │ │ │ │ 27 ║ │ 0 │ │ │
│ 12 ║ │ 0 │ │ │ │ 28 ║ │ 0 │ │ │
│ 13 ║ │ 0 │ │ │ │ 29 ║ │ 0 │ │ │
│ 14 ║ │ 0 │ │ │ │ 30 ║ │ 0 │ │ │
│ 15 ║ │ 0 │ │ │ │ 31 ║ │ 0 │ │ │
│ 16 ║ │ 0 │ │ │ │ 32 ║ │ 0 │ │ │
└──────╨───────────┴──────┴─────┴────┘ └──────╨───────────┴──────┴─────┴────┘
ESC=Exit, F1=Help, ENTER=Edit Field, INS=Insert Field, DEL=Delete Field
You specify a sort field by moving the cursor to the desired field. You may
then insert, delete or edit fields as described above.
You may specify up to 32 sort fields. Four pieces of information are required
for each sort field: the dBase field name or starting position, the field
length, the field type and the sort order.
If you are in the Field Name column and press F1, a list of sort fields will
be displayed. The list will be similar to the following:
╔═════════════════════════╗ You can select a field from the list by moving
║Database Name: NOTES.DB ║ the cursor to the desired field and pressing
╟───────────┬────┬────┬───╢ Enter. When a field is selected, the name
║Field Name │Type│Len │Dec║ length and type are entered automatically.
╠═══════════╧════╧════╧═══╣
║TEXT C 65 0║ You may change the selected type or length in
║TREATNO C 9 0║ order to specify if you desire. Increasing
║SEQNO N 3 0║ the field length will include part of the
║ ║ following field. Decreasing the field length
║ ║ will sort on only the first part of a field.
║ ║
║ ║ Changing the field type from N to C will cause
║ ║ a numeric field to be sorted as though it
║ ║ contained characters.
║ ║
║ ║ If you wish to sort on middle or end positions
║ ║ of a field, you may do so by entering the
║ ║ starting position of the field to sort relative
║ ║ to the first character of the first field.
║ ║
║ ║ The first field always starts in position 2.
╚═════════════════════════╝
You can find out where a field starts, e.g. SEQNO, by entering the field name
in an unused sort field line, then quitting the sort field menu, changing the
Record Type to Variable and redisplaying the SortField menu. All field names
will be replaced by their starting position. Note where the field starts, exit
SortFields, change the Record Type back to dBase and re-enter the SortField
menu. You will again see field names. Replace the name, e.g. SEQNO, with the
starting position plus the desired offset of the sub field. In the above
example, SEQNO starts at position 76. If you wish to sort on the second and
third positions of SEQNO only, Enter 77 for the Field Name and 2 for the
length.
Options Menu Option
-------------------
Select the Options menu option to specify the type of operation to be per-
formed (HeapSort, QuickSort or Merge) and to specify work drives if you have
selected a Sort option. The Options display was described above.
If you select a Sort Option, you can use the Work Drive menu item to indicate
where your sort work drives are to be placed. The default is drive C.
If you select Merge, you will be asked for the number of files to merge. You
may pick a number between 2 and 5. Selecting the Merge option disables the
Work Drives.
Help Menu Option
----------------
This option displays a one page help summary describing the menuing system.
About Menu Option
-----------------
The About option displays the following:
┌─────────────────────────────────────────────────────────────────LSMENU 1.00──┐
│ File Record Sortfield Options Help About │
└──────────────────────────────────────────────────────────────────────────────┘
┌──────────────────────────────────────────────┐
│ LSMENU Version 1.00 │
│ Copyright LONDON COMPUTING 1989 │
│ │
│ LSORT Version 3.10 │
│ Copyright LONDON COMPUTING 1983 to 1989 │
│ │
│ All rights reserved. │
│ │
│ LSMENU and LSORT are User Supported Software │
│ Registration ($25.00) required. Please send │
│ registration fees to: │
│ LONDON COMPUTING ▄▄▄▄▄▄ │
│ P.O. Box 696 █ OK █ │
│ Cherry Hill, NJ 08003 ▀▀▀▀▀▀ │
└──────────────────────────────────────────────┘
You can close the about window by pressing the letter O, pressing ENTER or
pressing ESC.
LSRT for WINDOWS
LSRT for Windows is a fast in memory sort program with a Windows front end.
It consists of two programs and a VBX file.
LSRTWIN3 -- a Visual Basic front end to LSRT and
LSRTWIN -- a version of LSRT modified to run under Windows that was
created using the QCWIN option of Quick C for Windows.
CMDIALOG.VBX is included. Copy to your \WINDOWS\SYSTEM directory.
VBRUN300.DLL is required to run Visual Basic executables. It is
not included but is available on Compuserv and other BBS's.
To install LSRT for Windows, copy the files LSRTWIN3.EXE, LSRTWIN.EXE
to your WINDOWS directory, usually (C:\WINDOWS). If you do not own
Visual Basic and have not previously downloaded a copy of VBRUN200.DLL,
copy VBRUN200.DLL to your WINDOWS directory. Copy CMDIALOG.VBX to your
WINDOWS directory.
After all the files have been copied, add the program to an existing
group or create a new group for LSORT. To add LSRT for Windows to a
group, open the group, then click on File then New. A dialog box will
be displayed asking if you wish to create a new Item or new Group.
Click on Program Item to add a new item to the existing group. A
dialog box will be displayed asking for the program description and
command line. Enter "LSRT for Windows" in the description field.
Enter "LSRTWIN3" in the command line field. Click OK. LSRT for
Windows will now be available.
LSRT for Windows provides a menu driven front end for LSRT. It allows you to
use familiar windows tools to select the input and output files and define
the SORT fields. The help function will tell you how to use it.
LSORT for WINDOWS
LSORT for Windows is a full function sort program with a Windows front end.
It consists of three programs and a VBX file.
LSORTWIN3 -- a Visual Basic front end to LSRT and
LSORTWIN -- a version of LSRT modified to run under Windows that was
created using the QCWIN option of Quick C for Windows.
DB3COPYW -- a Windows Utility to display all or part of an xBase file.
CMDIALOG.VBX
STRTOHEX.DLL
VBRUN300.DLL is required to run Visual Basic executables. It is not
included but is avaiable on Compuserv and other BBS's.
To install LSORT for Windows, copy the files LSORTWN3.EXE, LSORTWIN.EXE
and DB3COPYW.exe to your WINDOWS directory, usually (C:\WINDOWS). If
you do not own Visual Basic and have not previously downloaded a copy
of VBRUN300.DLL, copy VBRUN300.DLL to your WINDOWS directory. Copy
CMDIALOG.VBX and STRTOHEX.DLL to your Windows directory.
After all the files have been copied, add the program to an existing
group or create a new group for LSORT. To add LSORT for Windows to a
group, open the group, then click on File then New. A dialog box will
be displayed asking if you wish to create a new Item or new Group.
Click on Program Item to add a new item to the existing group. A
dialog box will be displayed asking for the program description and
command line. Enter "LSORT for Windows" in the description field.
Enter "LSORTWN3" in the command line field. Click OK. LSORT for
Windows will now be available.
LSORT for Windows provides a menu driven front end for LSORT. It allows you to
use familiar windows tools to select the input and output files and define
the SORT fields. The help function will tell you how to use it.
When using LSORT for Windows, you must always define an input and
output file and define your SORT fields. You may optionally pick a
sorting algorithm (Help Sort or Quick Sort), define the locations of
Work Files, determine the file type (Text, Comma Delim, Fixed Record
or xBase) and view the file prior to sorting. When selecting the sort
fields, LSORT for Windows will display the database structure in a Listbox.
LSORT for Windows now supports the Merge functions of LSORT.
