REXX Tips & Tricks:Sample source code
This section contains some sample source code. (see also Using the samples)
Using ANSI sequences
This section contains some routines for the display and for redefining of keys using ANSI sequences. (see also ANSI ESC Sequences)
Check if ANSI is active - 1 -
/* sample routine to check if ANSI is activated */
/* */
/* see also Check if ANSI is active - 2 - */
/* */
i = CheckAnsi()
if i = 1 then
say "ANSI is activated"
else
if i = 0 then
say "ANSI is not activated."
else
say "Error detecting ANSI."
exit 0
/* ------------------------------------------------------------------ */
/* function: Check if ANSI is activated */
/* */
/* call: CheckAnsi */
/* */
/* where: - */
/* */
/* returns: 1 - ANSI support detected */
/* 0 - no ANSI support available */
/* -1 - error detecting ansi */
/* */
/* note: Tested with the German and the US version of OS/2 3.0 */
/* */
/* */
CheckAnsi: PROCEDURE
thisRC = -1
trace off
/* install a local error handler */
SIGNAL ON ERROR Name InitAnsiEnd
"@ANSI 2>NUL | rxqueue 2>NUL"
thisRC = 0
do while queued() <> 0
queueLine = lineIN( "QUEUE:" )
if pos( " on.", queueLine ) <> 0 | , /* USA */
pos( " (ON).", queueLine ) <> 0 then /* GER */
thisRC = 1
end /* do while queued() <> 0 */
InitAnsiEnd:
RETURN thisRC
Check if ANSI is active - 2 -
/* sample routine to check if ANSI is activated (using REXXUTIL) */
/* based on a idea and code of Erik Schneller */
/* (see EMail Addresses) */
/* */
/* see also Check if ANSI is active - 1 - */
/* */
i = CheckAnsi()
if i = 1 then
say "ANSI is activated"
else
if i = 0 then
say "ANSI is not activated."
else
say "Error detecting ANSI."
exit 0
/* ------------------------------------------------------------------ */
/* function: Check if ANSI is activated */
/* */
/* call: CheckAnsi */
/* */
/* where: - */
/* */
/* returns: 1 - ANSI support detected */
/* 0 - no ANSI support available */
/* -1 - error detecting ansi */
/* */
/* note: Tested with the German and the US version of OS/2 3.0 */
/* based on a idea and code of Erik Schneller */
/* (see EMail Addresses) */
/* */
/* */
CheckAnsi: PROCEDURE
thisRC = -1
/* install a local error handler */
SIGNAL ON ERROR Name InitAnsiEnd
/* register the function SysCurPos from REXXUTIL */
call rxFuncAdd "SysCurPos", "REXXUTIL", "SysCurPos"
/* get and save the current cursor position */
curPos = SysCurPos()
/* write a CR/LF and the ANSI code for CursorUp */
call charOut , D2C(13) || "1B"x || "[1A"
/* now get the current cursor position */
NewPos=SysCurPos()
/* compare the new position to the old position */
if LEFT( NewPos,2 ) == LEFT( curPos,2 ) THEN
do
/* ANSI support is OFF */
thisRC = 0
/* goto the begin of the line and delete the garbage */
call CharOut, D2C(13) || copies( " ",4 ) || D2C(13)
end /* if left( ... */
else
do
/* ANSI support is ON */
/* restore the old cursor position */
call CharOut , "1B"x || "[B"
thisRC = 1
end /* else */
InitAnsiEnd:
RETURN thisRC
Get the current cursor position
/* sample routine to get the current cursor position with plain REXX */
/* and ANSI commands */
/* Original code is from the ANSICD package from Jamie Hoglund */
parse value GetCursorPos() with col row
say "At program start the cursor was at " || ,
"Column " || col || ", Row " || row || "."
exit 0
/* ------------------------------------------------------------------ */
/* function: Get the current cursor position */
/* */
/* call: GetCursorPos */
/* */
/* returns: col row */
/* */
/* note: This function works only for display sizes up to 200 for */
/* columns or rows. The upper left corner is 1,1. */
/* The REXXUTIL function SysCurPos uses zero based values */
/* (the upper left corner is 0,0). */
/* Caution: v2.90*/
/* The REXX Queue must be empty for this code to work! */
/* If the REXX Queue is not empty, you can use code */
/* like */
/* - create a new */
/* - make the new queue the default queue */
/* - call GetCursorPos */
/* - make the old queue the default queue again */
/* - delete the new queue */
/* */
GetCursorPos: PROCEDURE
usedChars = ":;<=>?@ABCD"
Rc = Charout(,D2C(27) || "[6n")
Pull Q
/* v2.30 */
parse var q 3 y1 +1 y2 +1 3 row +2 6 x1 +1 x2 +1 6 col +2 .
if pos( y1, usedChars ) <> 0 then
row = 10 || y2
if pos( x1, usedChars ) <> 0 then
col = 10 || x2
return col row
Get the current screen size
/* sample routine to get the current screensize for textmode windows */
/* without using REXXUTIL functions. */
parse value GetDisplaySize() with columns rows
say "The current OS/2 window size is " || ,
rows || " rows and " || columns || " columns."
exit 0
/* ------------------------------------------------------------------ */
/* function: Get the current display size */
/* */
/* call: GetDisplaySize */
/* */
/* returns: columns rows */
/* */
/* note: This function works only for display sizes up to 200 for */
/* columns or rows. The upper left corner is 1,1. */
/* The REXXUTIL function SysCurPos uses zero based values */
/* (the upper left corner is 0,0). */
/* */
GetDisplaySize: PROCEDURE expose thisPos
usedChars = ":;<=>?@ABCD"
/* save current cursor position */
rc = CharOut(, D2C(27) || '[' || "6n")
pull curPos
/* try to set the cursor to the position 200,200 */
rc = CharOut(, D2C(27) || '[' || "200;200H" )
/* get cursor position */
rc = CharOut(, D2C(27) || '[' || "6n")
pull tPos
/* restore current cursor position */
rc = CharOut(, substr( curPos,1, length( curPos)-1) || "H" )
/* v2.30 */
parse var tPos 3 y1 +1 y2 +1 3 rows +2 6 x1 +1 x2 +1 6 cols +2 .
if pos( y1, usedChars ) <> 0 then
rows = 10 || y2
if pos( x1, usedChars ) <> 0 then
cols = 10 || x2
RETURN cols rows
Redefine some keys
/* sample code to do some key remapping with ANSI sequences */
/* see also ANSI ESC Sequences , */
/* Key codes for key redefinitions and */
/* Using function keys */
/* */
/* Note: Turning extended keys off is NOT necessary for key v1.60 */
/* remapping. This information in RXT&T v1.50 was wrong. v1.60 */
/* set F1 key to HELP<RETURN> */
call CharOut , '1B'x || '[0;59;"HELP";13p'
/* set ALT-F10 to EXIT (without RETURN) */
call CharOut , '1B'x || '[0;113;"EXIT";p'
/* set "A" to ABER (without RETURN) */
/* corrected in RXT&T v1.60 */
call CharOut , '1B'x || '[65;"ABER";p'
/* reset F1 key to F1 */
call CharOut , '1B'x || '[0;59;0;59;p'
Using function keys
To use function keys without the REXXUTIL functions, redefine them with a trailing CR (see also ANSI ESC Sequences, Key codes for key redefinitions, and download RxLBox for a working example):
/* sample key redefinitons */
/* new definitons for the function keys */
keys.0 = 0
i = keys.0
i=i+1; keys.i.__org = '59'; keys.i.__new = 'F1'
i=i+1; keys.i.__org = '60'; keys.i.__new = 'F2'
i=i+1; keys.i.__org = '61'; keys.i.__new = 'F3'
i=i+1; keys.i.__org = '62'; keys.i.__new = 'F4'
i=i+1; keys.i.__org = '63'; keys.i.__new = 'F5'
i=i+1; keys.i.__org = '64'; keys.i.__new = 'F6'
i=i+1; keys.i.__org = '65'; keys.i.__new = 'F7'
i=i+1; keys.i.__org = '66'; keys.i.__new = 'F8'
i=i+1; keys.i.__org = '67'; keys.i.__new = 'F9'
i=i+1; keys.i.__org = '68'; keys.i.__new = 'F10'
keys.0 = i
/* ANSI esc sequence */
ansi.__ESC = '1B'x
/* special character to detect function keys */
specialChar = 'FE'x
/* install error handler for CTRL-BREAK */
signal on halt
/* redefine the function keys */
do i = 1 to keys.0
call CharOut , ansi.__ESC || '[0;' || keys.i.__org || ';' || ,
'"' || specialChar || keys.i.__New || specialChar || '"' || ,
';13p'
end /* do i = 1 to keys.0 */
/* test the new key definitons */
do forever
call LineOut, 'Test the function key redefinitions'
call CharOut, 'Enter a string (F10 to end): '
userInput = lineIn()
/* test for function keys */
parse var UserInput part1 (specialChar) fKey (specialChar) part2
UserInput = part1 || part2
say 'Userinput was: "' || UserInput || '"'
if fkey = '' then
say 'No function key pressed.'
else
say 'Function key "' || fkey || '" pressed.'
if fkey = 'F10' then
leave
end /* do forever */
ProgramEnd:
/* undo the key redefinitons */
do i = 1 to keys.0
call CharOut , ansi.__ESC || '[0;' || keys.i.__org || ';' || ,
'0;' || keys.i.__org || ';p'
end /* do i = 1 to keys.0 */
exit
/* error handler for CTRL-BREAK */
Halt:
say
say 'Program aborted by the user!'
signal ProgramEnd
Use ANSI for a password input routine
/* sample input routine for passwords using ANSI sequences to hide */
/* the input (stolen from a message on a public CompuServe forum) */
/* */
myPassWord = GetPassword( "Please enter the password: " )
say "You entered the password: " || myPassword
exit
/* ------------------------------------------------------------------ */
/* function: get a password from the user (without showing it on the */
/* screen) */
/* */
/* call: GetPassword( {prompt} ) */
/* */
/* where: prompt - prompt string */
/* def.: none */
/* */
/* returns: the entered password */
/* */
/* note: This code only works with ANSI enabled */
/* */
/* */
GetPassword: PROCEDURE
parse arg prompt
/* show the prompt (if any) and set the screen */
/* attributes to notvisible */
call CharOut , prompt || "1B"x || "[8m"
/* get the user input */
parse pull password
/* reset the screen attributes */
call CharOut , "1B"x || "[0m"
RETURN password
Using the lower right corner of the display
To print a character to the lower right corner of the screen without scrolling you must turn off the word wrap function of the ANSI driver (see also ANSI ESC Sequences):
/* code to show how to use the lower right corner of the display */
/* ESC code for ANSI sequences */
ansi.__ESC = "1B"x
/* ANSI sequences to position the cursor in the */
/* upper right corner */
ansi.__Pos0 = ansi.__ESC || "[1;1H"
/* ANSI code to turn word wrap off */
ansi.__WordWrapOff = ansi.__ESC || "[7l"
/* ANSI code to turn word wrap on */
ansi.__WordWrapOn = ansi.__ESC || "[7h"
/* empty line for the menu frame */
Menu.__emptyLine = "º" || copies( " ", 78 ) || "º"
/* separator lines for the menu frame */
Menu.__FrameLine1 = copies( "Í", 78 )
Menu.__FrameLine2 = copies( "Ä", 76 )
/* menu frame */
Menu.__MenuMask = ,
ansi.__Pos0 || , /* position cursor */
ansi.__WordWrapOn || , /* turn word wrap on! */
"É" || Menu.__FrameLine1 || "»" || , /* menu frame */
Menu.__emptyLine || ,
Menu.__emptyLine || ,
"º " || Menu.__FrameLine2 || " º" || ,
Menu.__emptyLine || ,
"Ì" || Menu.__FrameLine1 || "¹" || ,
copies( Menu.__emptyLine, 14 ) || ,
"Ì" || Menu.__FrameLine1 || "¹" || ,
Menu.__emptyLine || ,
"º " || Menu.__FrameLine2 || " º" || ,
Menu.__emptyLine || ,
ansi.__WordWrapOff || , /* turn word wrap off */
"È" || Menu.__FrameLine1 || "¼" || , /* last menu line */
ansi.__Pos0 || , /* position cursor */
ansi.__WordWrapOn /* turn word wrap on */
/* clear the screen */
'cls'
/* show the menu frame */
call CharOut , Menu.__MenuMask
/* position the cursor in the middle of the */
/* screen */
call CharOut , ansi.__ESC || "[12;30H"
/* wait for a key from the user */
"@pause"
Date converting
Unpack packed data
Unpack routine from Steve Pitts (see EMail Addresses) Captured from a message in a public CompuServe Forum
/* ------------------------------------------------------------------ */
/* function: unpack routine for packed data (from mainframes) */
/* */
/* call: unpack packed_str {,num_dec} */
/* */
/* where: packed_str = the packed data */
/* num_dec = number of decimals (def.: 0) */
/* */
/* */
/* returns: the unpacked number or "" in case of an error */
/* */
Unpack: PROCEDURE
parse arg packed_str, num_dec
if num_dec = "" then
num_dec=0
/* Convert packed data to hex and split into */
/* number and sign portions */
hex_str=c2x( packed_str )
dec_str=left( hex_str, length( hex_str )-1 )
packed_sign=right( hex_str, 1 )
/* Check that sign and numeric portions have */
/* valid values */
if verify( packed_sign, "ABCDEF" ) > 0 then
return ""
if verify( dec_str, "0123456789" ) > 0 then
return ""
/* Are there enough digits for the decimal */
/* point?? */
if num_dec > length( dec_str ) then
return ""
/* If sign portion indicates a negative */
/* number then oblige */
if pos( packed_sign, "BD" ) > 0 then
dec_str=0-dec_str
/* If there is a decimal point then add it at */
/* the appropriate place */
if num_dec > 0 then
dec_str=insert( ".", dec_str, length( dec_str )-num_dec )
RETURN dec_str
EBCDIC to ASCII & ASCII to EBCDIC
captured from a message in a public CompuServe Forum Author: Dick Goran, (see EMail Addresses)
(see also RXGWA1 - ASCII <-> EBCDIC)
The tables below can be used with the REXX TRANSLATE() instruction:
/**********************************************************************/
/* EBCDIC To ASCII & ASCII To EBCDIC Translate Tables */
/**********************************************************************/
EBCDIC_OUT = XRANGE(000, 003) ||, /* NUL SOH STX ETX */
XRANGE(055, 055) ||, /* EOT */
XRANGE(045, 047) ||, /* ENQ ACK BEL */
XRANGE(022, 022) ||, /* BS */
XRANGE(005, 005) ||, /* HT */
XRANGE(037, 037) ||, /* LF */
XRANGE(011, 018) ||, /* VT FF CR SO SI DLE DC1 DC2 */
XRANGE(000, 000) ||, /* DC3 */
XRANGE(060, 061) ||, /* DC4 NAK */
XRANGE(050, 050) ||, /* SYN */
XRANGE(038, 038) ||, /* ETB */
XRANGE(024, 025) ||, /* CAN EM */
XRANGE(063, 063) ||, /* SUB */
XRANGE(039, 039) ||, /* ESC */
XRANGE(028, 031) ||, /* FS GS RS US */
XRANGE(090, 090) ||, /* ! */
XRANGE(127, 127) ||, /* " */
XRANGE(123, 123) ||, /* # */
XRANGE(091, 091) ||, /* $ */
XRANGE(108, 108) ||, /* % */
XRANGE(080, 080) ||, /* & */
XRANGE(125, 125) ||, /* ' */
XRANGE(077, 077) ||, /* ( */
XRANGE(093, 093) ||, /* ) */
XRANGE(092, 092) ||, /* * */
XRANGE(078, 078) ||, /* + */
XRANGE(107, 107) ||, /* , */
XRANGE(096, 096) ||, /* - */
XRANGE(075, 075) ||, /* . */
XRANGE(097, 097) ||, /* / */
XRANGE(240, 249) ||, /* 0 - 9 */
XRANGE(122, 122) ||, /* : */
XRANGE(094, 094) ||, /* ; */
XRANGE(076, 076) ||, /* < */
XRANGE(126, 126) ||, /* = */
XRANGE(110, 110) ||, /* > */
XRANGE(111, 111) ||, /* ? */
XRANGE(124, 124) ||, /* @ */
XRANGE(193, 201) ||, /* A - I */
XRANGE(209, 217) ||, /* J - R */
XRANGE(226, 233) ||, /* S - Z */
XRANGE(173, 173) ||, /* [ */
XRANGE(224, 224) ||, /* \ */
XRANGE(189, 189) ||, /* ] */
XRANGE(095, 095) ||, /* ^ */
XRANGE(109, 109) ||, /* _ */
XRANGE(121, 121) ||, /* ` */
XRANGE(129, 137) ||, /* a - i */
XRANGE(145, 153) ||, /* j - r */
XRANGE(162, 169) ||, /* s - z */
XRANGE(139, 139) ||, /* { */
XRANGE(106, 106) ||, /* | */
XRANGE(155, 155) ||, /* } */
XRANGE(161, 161) ||, /* ~ */
XRANGE(007, 007) /* DEL */
ASCII_OUT = XRANGE(000, 003) ||, /* NUL SOH STX ETX */
XRANGE(000, 000) ||, /* PF */
XRANGE(009, 009) ||, /* HT */
XRANGE(000, 000) ||, /* LC */
XRANGE(127, 127) ||, /* DEL */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* SMM */
XRANGE(011, 018) ||, /* VT CR SO SI DLE DC1 DC2 */
XRANGE(000, 000) ||, /* TM */
XRANGE(000, 000) ||, /* RES */
XRANGE(000, 000) ||, /* NL */
XRANGE(008, 008) ||, /* BS */
XRANGE(000, 000) ||, /* IL */
XRANGE(024, 025) ||, /* CAN EM */
XRANGE(000, 000) ||, /* CC */
XRANGE(000, 000) ||, /* CU1 */
XRANGE(028, 031) ||, /* FS GS RS US */
XRANGE(000, 000) ||, /* DS */
XRANGE(000, 000) ||, /* SOS */
XRANGE(028, 028) ||, /* FS */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* BYP */
XRANGE(010, 010) ||, /* LF */
XRANGE(023, 023) ||, /* ETB */
XRANGE(027, 027) ||, /* ESC */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* SM */
XRANGE(000, 000) ||, /* CU2 */
XRANGE(000, 000) ||, /* */
XRANGE(005, 007) ||, /* ENQ ACK BEL */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(022, 022) ||, /* SYN */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* PN */
XRANGE(000, 000) ||, /* RS */
XRANGE(000, 000) ||, /* UC */
XRANGE(004, 004) ||, /* EOT */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* CU3 */
XRANGE(020, 020) ||, /* DC4 */
XRANGE(021, 021) ||, /* NAK */
XRANGE(000, 000) ||, /* */
XRANGE(026, 026) ||, /* SUB */
XRANGE(032, 032) ||, /* space */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* cent sign */
XRANGE(046, 046) ||, /* . */
XRANGE(060, 060) ||, /* < */
XRANGE(040, 040) ||, /* ( */
XRANGE(043, 043) ||, /* + */
XRANGE(033, 033) ||, /* | */
XRANGE(038, 038) ||, /* & */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(033, 033) ||, /* ! */
XRANGE(036, 036) ||, /* $ */
XRANGE(042, 042) ||, /* * */
XRANGE(041, 041) ||, /* ) */
XRANGE(059, 059) ||, /* ; */
XRANGE(000, 000) ||, /* not symbol */
XRANGE(045, 045) ||, /* - */
XRANGE(047, 047) ||, /* / */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(124, 124) ||, /* | */
XRANGE(044, 044) ||, /* , */
XRANGE(037, 037) ||, /* % */
XRANGE(095, 095) ||, /* _ */
XRANGE(062, 062) ||, /* > */
XRANGE(063, 063) ||, /* ? */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(096, 096) ||, /* ` */
XRANGE(058, 058) ||, /* : */
XRANGE(035, 035) ||, /* # */
XRANGE(064, 064) ||, /* @ */
XRANGE(039, 039) ||, /* ' */
XRANGE(061, 061) ||, /* = */
XRANGE(034, 034) ||, /* " */
XRANGE(097, 105) ||, /* a - i */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(106, 114) ||, /* j - r */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(000, 000) ||, /* */
XRANGE(126, 126) ||, /* ~ */
XRANGE(115, 122) ||, /* s - z */
COPIES(192 - 170, D2C(0)) ||,
XRANGE(123, 123) ||, /* { */
XRANGE(065, 073) ||, /* A - I */
COPIES(209 - 202, D2C(0)) ||,
XRANGE(074, 082) ||, /* J - R */
COPIES(224 - 218, D2C(0)) ||,
XRANGE(092, 092) ||, /* \ */
XRANGE(000, 000) ||, /* */
XRANGE(083, 090) ||, /* S - Z */
COPIES(240 - 234, D2C(0)) ||,
XRANGE(048, 057) ||, /* J - R */
COPIES(256 - 250, D2C(0))
Uppercase & Lowercase including German "Umlaute"
/* sample code to translate a string to uppercase or lowercase which */
/* also handles the German "Umlaute" */
/* Note that there's an country-dependent uppercase translation v1.80 */
/* routine in the new REXXUTIL DLL. Object-Oriented REXX */
say "Lower() " lower( "AbcdEF Ö Ä Ü ß 1234567890" )
say "Upper() " upper( "aBcDef ö ä ü ß 1234567890" )
exit
/* ------------------------------------------------------------------ */
/* function: Convert a char or string to uppercase */
/* */
/* call: Upper string */
/* */
/* where: string - string to convert */
/* */
/* returns: the converted string */
/* */
/* note: This implementation handles German "Umlaute" */
/* */
Upper: PROCEDURE
parse arg thisString
RETURN translate( thisString, "ABCDEFGHIJKLMNOPQRSTUVWXYZÄÖÜß" ,,
"abcdefghijklmnopqrstuvwxyzäöüß" )
/* ------------------------------------------------------------------ */
/* function: Convert a char or string to lowercase */
/* */
/* call: Lower string */
/* */
/* where: string - string to convert */
/* */
/* returns: the converted string */
/* */
/* note: This implementation handles German "Umlaute" */
/* */
Lower: PROCEDURE
parse arg thisString
RETURN translate( thisString, "abcdefghijklmnopqrstuvwxyzäöüß" ,,
"ABCDEFGHIJKLMNOPQRSTUVWXYZÄÖÜß" )
Date converting routine - 1 -
Captured from a message in a public CompuServe Forum
Note from the author from the PL/1 version
Julian (sense 1) date routines, handling Julian (sense 2) and Gregorian calendars. Algorithm is valid from 4713 B.C. to 19,999 A.D. This version is known to be free of errors.
Based on Pascal code copyright 1985 by Michael A. Covington, published in P.C. Tech Journal, December 1985, based on formulae appearing in Astronomical Formulae for Calculators by Jean Meeus. Reconversion to normal Julian epoch, integer arithmetic, 4000-year correction, and translation to PL/I by John W. Kennedy
Historical exceptions _not_ allowed for in this module: Until Julius Caesar established the Julian calendar in 45 B.C., calendars were irregular. This module assumes the Julian calendar back to 4713 B.C. The Julian calendar was altered in 8 B.C. From 45 B.C. to 8 B.C., the months were Jan=31, Feb=29(30), Mar=31, Apr=30, May=31, Jun=30, Jul=31, Aug=30, Sep=31, Oct=30, Nov=31, Dec=30 This module assumes the month lengths as we know them. Leap years from 45 B.C. to 8 A.D. were miscalculated: (45, 42, 39, 36, 33, 30, 27, 24, 21, 18, 15, 12, 9, then none at all until 8 A.D.) This module assumes leap years every four years, as they were meant to have been. January 1 was not always the first day of the year. The United Kingdom, in particular, started the year on March 25 until 1752. (However, the year ended on December 31, leaving the days between in limbo.) This module assumes January 1 is the first day of the year. Leap-year day was originally done by having February 24 (25 from 45 to 8 B.C.) twice. This module assumes Leap-year day is February 29.
The "Transition" argument is the first Julian date to be considered as belonging to the Gregorian calendar. Usual values are: 2299161 = October 5/15, 1582, as in Rome, or 2361222 = September 3/14, 1752, as in the United Kingdom and the American colonies
/* sample routines to convert dates */
call Charout , "Enter a date in the format dd.mm.yyyy: "
curDMYDate = lineIn()
curJulianDate = DMYToJulian( curDMYDate )
say "DMYToJulian(" || curDMYDate || ") is " || curJulianDate
say "JulianToDMY(" || curJulianDate || ") is " || ,
JulianToDMY( curJulianDate )
exit 0
/* ------------------------------------------------------------------ */
/* function: Convert a date from Julian to DMY */
/* */
/* call: JulianToDMY julianDate {trans} */
/* */
/* where: julianDate - the date in julian format */
/* trans - see note above */
/* */
/* returns: the date in the format dd.mm.yyyy */
/* */
/* */
JulianToDMY: PROCEDURE
Arg J Trans
if Trans = "" then
Trans = 2299161
if J < Trans then
A = J
Else
do
AA = J - 1721120
AC = Trunc(AA / 1460969)
AB = 31 * AC
AA = AA - AC * 1460969
AC = Trunc(AA / 146097)
AB = AB + 3 * AC
AA = AA - AC * 146097
if AA = 146096 then
AB = AB + 3
Else
AB = AB + Trunc(AA / 36524)
A = J + (AB - 2)
end
B = A + 1524
C = Trunc((20 * B - 2442) / 7305)
D = Trunc(1461 * C / 4)
EE = B - D
E = Trunc(10000 * EE / 306001)
YMDD = EE - Trunc(306001 * E / 10000)
if E >= 14 then
YMDM = E - 13
else
YMDM = E - 1
if YMDM > 2 then
Y = C - 4716
else
Y = C - 4715
if Y < 1 then
YMDY = Y - 1
else
YMDY = Y
RETURN YMDD || '.' || YMDM || '.' || YMDY
/* ------------------------------------------------------------------ */
/* function: Convert a date from DMY to Julian */
/* */
/* call: DMYToJulian dmyDate {trans} */
/* trans - see note above */
/* */
/* where: dmyDate - the date in the format dd.mm.yyyy */
/* */
/* returns: the date in Julian format */
/* */
/* */
DMYToJulian: PROCEDURE
parse arg dmyDate trans
parse var dmyDate YMDD "." YMDM "." YMDY
if Trans = "" then
Trans = 2299161
AY = YMDY
if YMDY < 0 then
Y = YMDY + 4717
else
Y = YMDY + 4716
if YMDM < 3 then
do
M = YMDM + 12
Y = Y - 1
AY = AY - 1
end
else
M = YMDM
D = Trunc((1461 * Y) / 4) + Trunc((153 * (M + 1)) / 5) + YMDD - 1524
G = D + 2 - Trunc(AY / 100) + Trunc(AY / 400) - Trunc(AY / 4000)
if G >= Trans then
thisRC = G
else
thisRC = D
RETURN thisRC
Date converting routine - 2 -
/* sample routine to convert a date in the format dd/mm/yy into the */
/* base date format */
/* */
/* Description from the author: */
/* routine to convert a date passed in YY/MM/DD format (assumes the */
/* date is 19YY/MM/DD ) to Base date format which is based upon an */
/* imaginary calendar date of 1/1/0001 it then assumes there is a */
/* leap year every 4 years and every 400 years but not if the year */
/* is divisble by 100 */
/* */
/* Note: I do NOT know the author of this code. */
/* I found this code on an IBM BBS. */
/* */
do forever
say ""
say "Test the routine CalcBaseDate against the REXX function date"
say " Note that the REXX function date only handles dates AFTER"
say " the 01.01.1980!"
say "Enter a date to convert (dd.mm.yy, RETURN to end):"
testDate = strip( lineIn() )
if testDate = "" then
leave
say " result of CalcBaseDate( """ || testDate || """) is: " || ,
CalcBaseDate( testDate )
/* save the current date */
oldDate = date( "E" )
/* set the current date to the testdate to */
/* test the routine CalcBaseDate against the */
/* REXX function date( B ) */
"@date " testDate
say " result of the REXX function date( ""B"" ) is: " || ,
date( "B" )
/* restore the current date */
"@date " oldDate
end /* do forever */
exit 0
/* ------------------------------------------------------------------ */
/* function: Convert a date in the format dd.mm.yy into the base date */
/* format */
/* */
/* usage: CalcBaseDate dateToConvert */
/* */
/* where: dateToConvert - date to convert in the format dd.mm.yy */
/* */
/* returns: the date in base date format */
/* */
CalcBaseDate: PROCEDURE
/* initialize routine */
NonLeap. = 31
NonLeap.0 = 12
NonLeap.2 = 28
NonLeap.4 = 30
NonLeap.6 = 30
NonLeap.9 = 30
NonLeap.11 = 30
/* grab parameter and store it in cyear cmonth cdate */
parse arg cdate "." cmonth "." cyear .
/* grab year and convert it to YYYY */
/* simulate the behaviour of the REXX function date() */
if length( cyear ) <= 2 then
if cyear < 80 then
fullyear = "20" || cyear
else
fullyear = "19" || cyear
else
fullyear = cyear
numyears = fullyear -1
basedays = numyears * 365
QuadCentury = numyears % 400
Century = numyears % 100
LeapYears = numyears % 4
basedays = basedays + (((LeapYears - Century) + QuadCentury) - 1)
do i = 1 to (cmonth -1)
if i <> "2" then
basedays = basedays + NonLeap.i
else /* find if it's a leap year or not */
if (fullyear // 4) > 0 then
basedays=basedays + 28
else
if ((fullyear // 100) = 0) & ((fullyear // 400) > 0) then
do
/* century not divisble by 400 */
basedays = basedays + 28
end /* if */
else
do
/* quad century or regular leap year */
basedays = basedays + 29
end /* else */
end /* do */
basedays = basedays + cdate
return basedays
Convert values from/to INTEL format
On Intel processors words and doublewords are saved in the so-called INTEL format (LSB - last signifcant byte first). To use them, you must convert them into the MSB format (MSB - most significant byte first). Before using the following routine, you must convert the value into a hex string (see Get the display resolution for an example).
/* ------------------------------------------------------------------ */
/* function: Convert an WORD or DWORD from LSB format to MSB format */
/* and vice versa */
/* */
/* call: LSB2MSB inputHexString */
/* */
/* where: inputHexstring - input value as hexstring */
/* (e.g. "3412", "78563412") */
/* */
/* output: value in MSB format as hexstring */
/* (e.g. "1234", "12345678") */
/* */
LSB2MSB: PROCEDURE
HexZiffer = arg(1) /* v3.00 */
Len = Length(HexZiffer) /* v3.00 */
If (Len // 2) then /* v3.00 */
HexZiffer = Right(HexZiffer, Len + 1, '0') /* v3.00 */
RETURN strip( translate( "12345678",, /* v3.00 */
HexZiffer, "78563412" ) ) /* v3.00 */
Formatting numbers
/* sample routine to format a number into the format */
/* nnn.nnn.nnn */
/* and vice versa */
/* */
/* Source: I found routines of this type in various messages on the */
/* IBM REXX forums */
/* (see also EdmREXX - misc. functions for REXX) */
/* */
do forever
call CharOut , "Enter a number (RETURN to end): "
thisNumber = lineIn()
if thisNumber = "" then
leave
else
do
thatNumber = FormatNumber( thisNumber )
call LineOut , "Result of FormatNumber( " || thisNumber || " ) is " ,
thatNumber
call LineOut , "Result of UnFormatNumber( " || thatNumber || " ) is " ,
UnFormatNumber( thatNumber )
end /* else */
end /* do forever */
exit
/* ------------------------------------------------------------------ */
/* function: Format a number like 123456789.44 into the format */
/* 123,456,789.44 */
/* */
/* call: FormatNumber number_to_format */
/* */
/* where: number_to_format */
/* */
/* returns: the formatted number */
/* */
/* note: works for all numbers up to (but not including) */
/* 1.000,000,000,000,000.0 */
/* */
/* Author: Graham Ewart */
/* */
FormatNumber: PROCEDURE expose (exposeList)
parse value arg(1) with whole "." decs
formattedNumber = strip( reverse( translate( "abc,def,ghi,jkl,mno",,
reverse(whole),,
"abcdefghijklmno",",")),"L",",")
if decs <> "" then
formattedNumber = formattedNumber || "." || decs
RETURN formattedNumber
/* ------------------------------------------------------------------ */
/* function: Unformat a number like 123,456,789.44 into the format */
/* 123456789.44 */
/* */
/* call: UnFormatNumber number_to_unformat */
/* */
/* where: number_to_unformat */
/* */
/* returns: the unformatted number */
/* */
/* note: works for all numbers */
/* */
UnFormatNumber: PROCEDURE
RETURN space( translate( arg(1), " ", "," ) , 0, )
Convert ASCII 850 string into/from ISO 8859-1 (1004) string
/* ------------------------------------------------------------------ */
/* function: Convert an ASCII 850 string into an ISO 8859-1 */
/* (1004) string and vice versa */
/* */
/* call: PC_ISOB thisString, outP */
/* */
/* where: thisString - the string to convert */
/* outP - function code, either */
/* 1004 to convert to ISO */
/* or */
/* 850 to convert to ASCII */
/* */
/* output: the converted string */
/* */
/* Notes: Note that this not a complete codepage conversion. */
/* We only care about the letters. */
/* */
/* Author: Oliver Heidelbach (see EMail Addresses) */
/* */
PC_ISO: PROCEDURE
PARSE ARG thisString, outp
aISO = 'a1 a2 a3 bf c0 c1 c2 c3 c4 c5 c6 c7 c8 c9 ca cb cc cd ce cf d0',
'd1 d2 d3 d4 d5 d6 d8 d9 da db dc dd de df e0 e1 e2 e3 e4 e5 e6',
'e7 e8 e9 ea eb ec ed ee ef f0 f1 f2 f3 f4 f5 f6 f8 f9 fa fb fc',
'fd fe ff'
aPC = 'ad bd 9c a8 b7 b5 b6 c7 8e 8f 92 80 d4 90 d2 d3 de d6 d7 d8 d1',
'a5 d2 d3 d4 e5 99 d8 eb e9 ea 9a ed e8 e1 85 a0 83 c6 84 86 91',
'87 8a 82 88 89 8d a1 8c 8b d0 a4 95 a2 93 e4 94 9b 97 a3 96 81',
'ec e7 98'
if outp = 1004 then
convbuf = Translate(thisString, X2C(aISO), X2C(aPC))
else
if outp = 850 then
convbuf = Translate(thisString, X2C(aPC), X2C(aISO))
RETURN convbuf
Convert Microsoft/IEEE Float binary into a string in Classic REXX
(see also Convert Microsoft/IEEE Float binary into a string in Object REXX)
/**********************************************************************/
/* These routines are the original work of Thos Davis */
/* (see EMail Addresses) */
/* and to the best of his knowledge do not include any copyrighted */
/* materials. */
/* */
/* These routines are hereby released into the Public Domain */
/**********************************************************************/
/* Microsoft/IEEE Float binary: *
+--------------------------------------------------------------------+
|bit |0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 A B C D E F|
+====+=============================================+=+===============+
|MKS | mantissa |s| exponent |
+----+---------------------------------------------+-+-------------+-|
|IEEE| mantissa | exponent |s|
+--------------------------------------------------+---------------+-+
*/
/* In both cases, the mantissa is the lower (least significant) */
/* 23 bits (plus an implied value of 1 for bit 24, the most */
/* significant bit of the mantissa), the sign is one bit, and */
/* the exponent is 8 bits. */
/* */
/* Because the mantissa has a 'virtual bit' whose value is always 1, */
/* the exponent is used to determine if the value is 0. */
/* */
/* IEEE Double Float binary is the same format as the single Float */
/* but the mantissa is 52 bits long (for 53 bits of significant */
/* binary digits [is that bigits?] after including the 'virtual 1' */
/* most significant bit) and the exponent is 11 bits long. */
/* */
/* !!! I M P O R T A N T !!! */
/* */
/* NUMERIC DIGITS should be set to about 16 to get the full value of */
/* Doubles. If these procedures are made into ROUTINES, it will be */
/* necessary to add the NUMERIC DIGITS setting to DoubleToString and */
/* GeneralFloat. */
/* */
/* !!! A L S O I M P O R T A N T !!! */
/* */
/* These functions do not recognize the special values */
/* +INF plus infinity */
/* -INF minus infinity */
/* +NAN not a number */
/* -NAN not a number */
/* */
mksToString: procedure
TheFloat = arg(1)
/* mks is the format used in older versions of */
/* MicroSoft BASIC and is, for some bizarre */
/* reason, used as the index value in the QWK */
/* BBS message packing scheme */
/* Intel uses different BYTE ordering and BIT */
/* ordering so byte strings must be REVERSED to */
/* make all ordering the same */
bFloat = Reverse( TheFloat )
/* There is no c2b function */
bFloat = x2b( c2x( bFloat ) )
/* make sure its 32 bits long */
bFloat = Right( bFloat, 32, '0' )
fMantissa = '1' || Right( bFloat, 23 )
fExponent = Left( bFloat, 8 )
fSign = SubStr( bFloat, 9, 1 )
/* I found the magicNumber values by trial and */
/* error */
magicNumber = 152
return GeneralFloat( fSign, fMantissa, fExponent, magicNumber )
FloatToString: procedure
TheFloat = arg(1)
bFloat = Reverse( TheFloat )
bFloat = x2b( c2x( bFloat ) )
bFloat = Right( bFloat, 32, '0' )
fMantissa = '1' || Right( bFloat, 23 )
fExponent = SubStr( bFloat, 2, 8 )
fSign = Left( bFloat, 1 )
magicNumber = 150
return GeneralFloat( fSign, fMantissa, fExponent, magicNumber )
DoubleToString: procedure
TheDouble = arg(1)
bDouble = Reverse( TheDouble )
bDouble = x2b( c2x( bDouble ) )
bDouble = Right( bDouble, 64, '0' )
dMantissa = '1' || Right( bDouble, 52 )
dExponent = SubStr( bDouble, 2, 11 )
dSign = Left( bDouble, 1 )
magicNumber = 1075
return GeneralFloat( dSign, dMantissa, dExponent, magicNumber )
GeneralFloat: procedure
theSign = arg(1)
theMantissa = arg(2)
theExponent = arg(3)
magicNumber = arg(4)
if theExponent = 0 then
ascFloat = 0
else
do
decMantissa = x2d( b2x( theMantissa ) )
decExponent = x2d( b2x( theExponent ) )
ascFloat = decMantissa * ( 2 ** ( decExponent - magicNumber ))
end
if theSign then
ascFloat = '-'ascFloat
return ascFloat
AN ADDENDUM
While converting from binary fractions to decimal fractions has some inherent inaccuracies, the REXX procedures I gave have some additional ones built in. REXX does not use binary arithmetic (at least it is not supposed to). Instead it uses decimal methods modeled on human arithmetic systems. This gives better results for decimal numbers, but tends to make arithmetic with binary fractions somewhat less accurate.
Because of this, and because I use arithmetic on the numbers when converting, _sometimes_ 'conversion artifacts' will be introduced which result in a representation slightly greater or less than the value which is returned by standard C library functions (e.g. printf() ). For example 0.5 decimal (1/2), which is 0.1 binary, should translate perfectly from one system to the other, will be translated from the double to 0.5000000000000002 using DoubleToString. Likewise 0.0625 decimal (1/16), which is 0.0001 binary, is translated as 0.06250000000000001.
Additionally, the results are dependent on the value of NUMERIC DIGITS. For example: 1.0 is translated by FloatToString() as 0.99999999999 when NUMERIC DIGITS is set to 11 (decimal), and 0.5 (decimal) is translated by DoubleToString as 0.49999999999999999999 when NUMERIC DIGITS is 20.
It is important to note that the actual value stored in the file is not changed.
If it is important to see very precise translations, these procedures may not be for you. However, with the information on the format of the numbers, you may be able to devise your own conversion procedures.
Additionally, I did not include the IEEE +INFINITY, -INFINITY, +NOT-A-NUMBER, and -NOT-A-NUMBER, because I do not have documentation on these values. However, based on actual conversions by Borland's C++ for OS/2 (version 1.5), I am led to believe that an exponent whose bits are all set to 1 indicates a SPECIAL VALUE. If the exponent is all ones, and the mantissa (with the virtual bit) has only its most significant bit set to 1, then that is INFINITY (+/- depending on the sign), and if the two most significant bits (including the virtual bit) are both set to 1 and no other bits in the mantissa are set to 1, then that is NOT-A-NUMBER. If the other bits are set to 1, I don't know what that means.
I use a test for the special exponent in my own routines (I use ObjectREXX) and then call SpecialFloat if it matches. If you use this type of procedure, then it may be necessary for your program to test for these values before performing additional math on them! I do not know if the MicroSoft Format used by early versions of BASIC has any special values.
::ROUTINE FloatToString PUBLIC
...
if fExponent = '11111111' then
return SpecialFloat( fSign, fMantissa, 'S' )
else
return GeneralFloat( ... )
::ROUTINE SpecialFloat
use arg theSign, theMantissa, theType
SELECT
WHEN theType = 'S' then lenMantissa = 24
WHEN theType = 'D' then lenMantissa = 53
END
SELECT
WHEN theMantissa = '1'~Left( lenMantissa, '0' ) THEN
ieeeSpecial = 'INFINITY'
WHEN theMantissa = '11'~Left( lenMantissa, '0' ) THEN
ieeeSpecial = 'NOT-A-NUMBER'
OTHERWISE
ieeeSpecial = 'UNKNOWN-MEANING'
END /* SELECT */
if theSign then
ieeeSpecial = '-'ieeeSpecial
else
ieeeSpecial = '+'ieeeSpecial
return 'IEEE:' ieeeSpecial
Convert Microsoft/IEEE Float binary into a string in Object REXX
(see also Convert Microsoft/IEEE Float binary into a string in Classic REXX; especially the addendum)
/**********************************************************************/
/* These routines are the original work of Thos Davis */
/* (see EMail Addresses) */
/* and to the best of his knowledge do not include any copyrighted */
/* materials. */
/* */
/* These routines are hereby released into the Public Domain */
/**********************************************************************/
/* Microsoft/IEEE Float binary: *
+--------------------------------------------------------------------+
|bit |0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 A B C D E F|
+====+=============================================+=+===============+
|MKS | mantissa |s| exponent |
+----+---------------------------------------------+-+-------------+-|
|IEEE| mantissa | exponent |s|
+--------------------------------------------------+---------------+-+
*/
/* In both cases, the mantissa is the lower (least significant) */
/* 23 bits (plus an implied value of 1 for bit 24, the most */
/* significant bit of the mantissa), the sign is one bit, and */
/* the exponent is 8 bits. */
/* */
/* Because the mantissa has a 'virtual bit' whose value is always 1, */
/* the exponent is used to determine if the value is 0. */
/* */
/* IEEE Double Float binary is the same format as the single Float */
/* but the mantissa is 52 bits long (for 53 bits of significant */
/* binary digits [is that bigits?] after including the 'virtual 1' */
/* most significant bit) and the exponent is 11 bits long. */
/* */
/* !!! I M P O R T A N T !!! */
/* */
/* NUMERIC DIGITS should be set to about 16 to get the full value of */
/* Doubles */
/* */
/* !!! A L S O I M P O R T A N T !!! */
/* */
/* These functions may not correctly recognize the special values */
/* +INF plus infinity */
/* -INF minus infinity */
/* +NAN not a number */
/* -NAN not a number */
/* */
::ROUTINE mksToString PUBLIC
use arg TheFloat
/* mks is the format used in older versions of */
/* MicroSoft BASIC and is, for some bizarre */
/* reason, used as the index value in the QWK */
/* BBS message packing scheme */
if TheFloat~Length \= 4 then
return 'NOT-A-FLOAT'
bFloat = TheFloat~Reverse~c2x~x2b~Right(32,'0')
fMantissa = '1' || bFloat~Right(23)
fExponent = bFloat~Left( 8 )
fSign = bFloat~SubStr( 9, 1 )
magicNumber = 152
return GeneralFloat( fSign, fMantissa, fExponent, magicNumber, Digits() )
::ROUTINE FloatToString PUBLIC
use arg TheFloat
if TheFloat~Length \= 4 then
return 'NOT-A-FLOAT'
bFloat = TheFloat~Reverse~c2x~x2b~Right(32,'0')
fMantissa = '1' || bFloat~Right(23)
fExponent = bFloat~SubStr( 2, 8 )
fSign = bFloat~Left(1)
magicNumber = 150
/* IS SPECIAL VALUE */
if fExponent = '11111111' then
return SpecialFloat( fSign, fMantissa, 'S' )
else
return GeneralFloat( fSign, fMantissa, fExponent, magicNumber, Digits() )
::ROUTINE DoubleToString PUBLIC
use arg TheDouble
NUMERIC DIGITS 16
if TheFloat~Length \= 8 then
return 'NOT-A-FLOAT'
bDouble = TheDouble~Reverse~c2x~x2b~Right(64,'0')
dMantissa = '1' || bDouble~Right(52)
dExponent = bDouble~SubStr( 2, 11 )
dSign = bDouble~Left(1)
magicNumber = 1075
/* IS SPECIAL VALUE */
if dExponent = '11111111111' then
return SpecialFloat( dSign, dMantissa, 'D' )
else
return GeneralFloat( dSign, dMantissa, dExponent, magicNumber, Digits() )
::ROUTINE GeneralFloat
use arg theSign, theMantissa, theExponent, magicNumber, numdigits
NUMERIC DIGITS numdigits
if theExponent = 0 then
ascFloat = 0
else
ascFloat = (theMantissa~b2x~x2d) * ( 2 ** ( (theExponent~b2x~x2d) - magicNumber ))
if theSign then
ascFloat = '-'ascFloat
return ascFloat
::ROUTINE SpecialFloat
use arg theSign, theMantissa, theType
SELECT
WHEN theType = 'S' then lenMantissa = 24
WHEN theType = 'D' then lenMantissa = 53
END
SELECT
WHEN theMantissa = '1'~Left( lenMantissa, '0' ) THEN
ieeeSpecial = 'INFINITY'
WHEN theMantissa = '11'~Left( lenMantissa, '0' ) THEN
ieeeSpecial = 'NOT-A-NUMBER'
OTHERWISE
ieeeSpecial = 'UNKNOWN-MEANING'
END /* SELECT */
if theSign then
ieeeSpecial = '-'ieeeSpecial
else
ieeeSpecial = '+'ieeeSpecial
return 'IEEE:' ieeeSpecial
Determine what day of the week a date falls on
/* sample code to determine what day of the week a date falls on */
/* */
/* Source: Found in a message in a public news group */
/* */
do forever
say 'Enter the date in the format dd.mm.yyyy (<return> to exit):'
thisDate = strip( translate( lineIn() ) )
if thisDate = '' then
leave
say 'The day of the week for the ' || thisDate || ,
' is: ' || dayOfTheWeek( thisDate )
end /* do forever */
exit
/* ------------------------------------------------------------------ */
/* function: Determine what day of the week a date falls on */
/* */
/* call: dayOfTheWeek = DayOfTheWeek( thisDate ) */
/* */
/* where: thisDate - date in the format dd.mm.yyyy */
/* */
/* returns: the name of the day or ERROR in case of an error */
/* */
/* */
DayOfTheWeek: PROCEDURE
/* install a local error handler */
signal on syntax name DayOfTheWeekError
sep = '.'
parse arg dd (sep) mm (sep) year
days = "Sunday Monday Tuesday Wednesday Thursday Friday Saturday"
magic = 6 2 3 6 1 4 6 2 5 0 3 5
parse var year cent +2 yr
leap = year // 4 = 0 & (yr\=0 | cent//4=0)
dow=yr + yr%4 + (6-2*(cent//4)) + word(magic,mm) + dd
if mm < 3 & \leap then
dow=dow+1
dow = dow // 7
return word(days,dow+1)
DayOfTheWeekError:
return 'ERROR'
Input & Output
Simulate the BASIC INPUT command
/* example for simulating the input command used in BASIC */
/* example call ... */
thisString = input( "Enter a string: " )
say "You entered '" || thisString || "'."
exit
/* ------------------------------------------------------------------ */
/* function: Simulate the BASIC command INPUT */
/* */
/* call: input( prompt ) */
/* */
/* where: prompt - prompt for the input */
/* */
/* returns: entered string */
/* */
Input: PROCEDURE
parse arg prompt
if prompt = "" then
prompt = "Your Input:"
/* set word wrap off */
call CharOut , "1B"x || "[7l"
/* show the prompt string */
call charOut , prompt || " "
/* get the user input */
thisRC = lineIn()
/* set word wrap on again */
call CharOut , "1B"x || "[7h"
RETURN thisRC
Simple Yes/No question
/* example for a simple yes/no question without loading the dll */
/* REXXUTIL */
/* example call ... */
thisKey = AskUser( "YN", "Enter Y or N: " )
say "You entered '" || thisKey || "'."
exit
/* ------------------------------------------------------------------ */
/* AskUser - get input from the user */
/* */
/* Usage: AskUser akeys, prompt */
/* */
/* where: */
/* akeys - allowed keys (all keys are translated to */
/* uppercase) */
/* prompt - prompt for the ask */
/* */
/* Returns: the pressed key in uppercase */
/* */
/* note: This routine uses ESC sequences to position the cursor. */
/* This routine only works if you do not use the */
/* last line of the screen for the prompt! */
/* */
AskUser: PROCEDURE
parse arg aKeys, prompt
aKeys = translate( akeys )
/* set word wrap off */
call CharOut , "1B"x || "[7l"
if prompt <> "" then
call charout , prompt
thisKey = " "
do UNTIL pos( thisKey , aKeys ) <> 0
call charOut ,"1B"x || "[s" || "1B"x || "[K"
thisKey = translate( charIn() )
call CharOut , "1B"x || "[u"
/* delete the CR/LF sequence from */
/* the keyboard buffer! */
dummy = lineIn()
end /* do until ... */
/* set word wrap on again */
call CharOut , "1B"x || "[7h"
/* do a linefeed */
say ""
RETURN thisKey
Choice routine for REXX
/* sample choice routine with timeout */
/* load REXXUTIL */
call rxFuncAdd "SysLoadFuncs", "REXXUTIL", "SysLoadFuncs"
call SysLoadFuncs
/* default key if no key is pressed */
thisDefault= "Y"
/* timeout value in seconds */
thisTimeOut = 10
call CharOut , "Waiting for a key "
parse value GetKey( thisDefault, thisTimeOut, "." ) with ,
thisRC "," pressedKey "," KeyPressed "," isFunctionKey
if thisRC = 1 then
if keyPressed = 1 then
if isFunctionKey = 1 then
say "Pressed the function key with the code " || C2D( pressedKey )
else
say "Pressed key is <" || pressedKey || ">"
else
say "No key pressed. Using the default."
else
say "Error while calling GetKey()!"
exit 0
/* ------------------------------------------------------------------ */
/* function: Get a key with timeout */
/* */
/* usage: GetKey default , timeOut, inProgressInd */
/* */
/* where: default - default key */
/* timeOut - timeOut in seconds */
/* inProgressInd - if <> "" char for the in progress */
/* indicator */
/* */
/* returns: thisRc, key, keypressed, functionKey */
/* */
/* where: thisRC - 1 if okay, else error */
/* key - pressed key (or default) */
/* keypressed - 1 if a key was pressed else 0 */
/* functionKey - 1 if a function key was pressed else 0 */
/* */
/* note: This function does not work as desired in OO REXX! v2.30 */
/* The reason is the different behaviour of the v2.30 */
/* function CHARS() in OO REXX! v2.30 */
/* */
/* [Tested with OBJREXX 6.00 12 Jul 1996] */
/* [Fixed in OBJREXX 6.00 26 Feb 1997 and newer versions] */
/* */
GetKey: PROCEDURE
parse arg default, timeOut, inProgressInd
/* init the return code(s) */
thisRC = 0
thisKey = default
keyPressed = 0
functionKey = 0
/* install a local error handler */
SIGNAL ON SYNTAX Name GetKeyEnd
do timeCount = 0 to timeOut
if InProgressInd <> "" then
call CharOut , inProgressInd
if chars() <> 0 then
do
/* there is a key available */
thisKey = SysGetKey( "NOECHO" )
if thisKey = "00"x | thisKey = "E0"x then
do
/* function key pressed */
thisKey = SysGetKey( "NOECHO" )
functionKey = 1
end /* if thisKey = "00"x | thisKey = "E0"x then */
keypressed = 1
leave
end /* if chars() <> 0 then */
else
do
/* wait a second */
call SysSleep 1
end /* else */
end /* do timeCount = 0 to timeOut */
/* set rc to execution is okay */
thisRC = 1
if inProgressInd <> "" then
say ""
GetKeyEnd:
RETURN thisRC || "," || thisKey || "," || keyPressed || "," || FunctionKey
sprintf routine for REXX
This is an implementation of the C function sprintf in REXX from Bernie Schneider Captured from a message in a public Internet news group (see Internet - Newsgroups)
/* ------------------------------------------------------------------ */
/* Program: SPRINTF */
/* Purpose: Returns a string formatted according to the format string */
/* specified in the first argument and the values specified */
/* in the remaining arguments. It is modeled after the */
/* SPRINTF function in the C/C++, AWK, PERL, etc. */
/* programming languages. */
/* */
/* Usage: say sprintf(fmt_string, value1, value2, ..., valuen) */
/* */
/* where fmt_string specifies the formatting to be done on the */
/* remaining arguments. The string is composed of literals and */
/* format specifiers. There should be one format specifier for */
/* each value to be formatted. */
/* Literals are considered to be anything that isn't a format */
/* specifier. Format specifiers are coded as follows: */
/* */
/* %[-][w][.d]z */
/* */
/* where */
/* "%" indicates the start of a format specifier. To use a % */
/* in a literal, specify two concecutive %s (%%, no argument */
/* value will be consumed). */
/* "-" is optional, and indicates that the argument value is to be */
/* left justified in its field. If it isn't present, the value */
/* will be right justified. */
/* "w" is optional, and it specifies the width of the field in */
/* characters. If it isn't specified, then as many characters */
/* as necessary will be used. For decimal numbers, this will */
/* depend on the current value of the numeric digits setting. */
/* The value will be truncated or padded with blanks as */
/* necessary to fit the width specified. Numbers to the right */
/* of the decimal point are padded with "0"s, and will be */
/* rounded if truncation is necessary. If a numeric value */
/* is -1 < valuen < +1, it will be padded with leading "0"s. */
/* ".d" is optional, and it specifies the maximum string width, or */
/* the number of digits to the right of the decimal point. */
/* "z" is a single character that indicates the type of conversion */
/* to be performed on the corresponding argument value. It may */
/* be one of the following: */
/* "d", formats a signed decimal integer */
/* "f", formats a signed decimal real number */
/* "s", formats a character string */
/* "x", formats an unsigned hexadecimal number */
/* */
/* Examples: */
/* say sprintf("Number = %d", 25) */
/* -> "Number = 25" */
/* say sprintf("Number = %5d", 25) */
/* -> "Number = 25" */
/* say sprintf("String = %s", "March") */
/* -> "String = March" */
/* say sprintf("String = %5.3s", "March") */
/* -> "String = Mar" */
/* say sprintf("Num = %8.2f", -123.456) */
/* -> "Num = -123.46" */
/* say sprintf("Num = '%-4x' String = '%-10s'", , */
/* 255, , */
/* "AbCde") */
/* -> "Num = 'FF ' String = 'AbCde '" */
/* say sprintf("%5.1f%%", .1757 * 100) */
/* -> " 17.6%" */
/* say sprintf("Num = %7.3f", 0.25) */
/* -> "Num = 000.250" */
/* */
/* Written: 27Nov95 */
/* Language:REXX */
/* Author: Bernie Schneider */
/* Notes: */
/* Revised: */
/*====================================================================*/
/* */
sprintf: procedure
argno = 1 /* Initialize argument counter */
string = ""
start = 1 /* Initialize pointer */
len = length(arg(1))
do until(p >= len)
s = ""
argno = argno + 1
p = pos("%", arg(1), start)
if p = 0 then
do
p = len + 1
end
if substr(arg(1), p, 1) == "%" then
do
s = "%"
end
string = string || substr(arg(1), start, p - start)
start = p + 1
p = verify(arg(1), "%cdfsx", "M", start)
if p = 0 then
leave
spec = substr(arg(1), start, p - start + 1)
start = p + 1
r = right(spec, 1)
spec = delstr(spec, length(spec), 1)
if left(spec,1) == "-" then
do /* Get any additional specs */
left = 1
spec = substr(spec, 2)
end
else
do
left = 0
spec = substr(spec, 1)
end
if spec \== "" then /* Get width and precision */
parse var spec width "." prec
else
do
width = 0
prec = 0
end
if \datatype(width, "W") then
width = 0
if \datatype(prec, "W") then
prec = 0
pad = " "
select
when r == "s" then
do
if width = 0 then
width = length(arg(argno))
if prec \= 0 then
s = left(arg(argno), prec) /* Truncate or pad */
else
s = arg(argno)
end
when r == "d" then
do
if width = 0 then
width = length(arg(argno))
s = format(arg(argno), length(arg(argno)), 0)
end
when r == "f" then
do
if arg(argno) > -1 & arg(argno) < 1 then
pad = "0"
parse value arg(argno) with int "." frac
if width = 0 & prec = 0 then
do
d = 1
if arg(argno) < 0 then d = 2
width = digits() + d
prec = digits() - (length(int)) + d - 1
end
if width = 0 then
width = len - prec
s = format(arg(argno), width, prec)
end
when r == "x" then
do
if width = 0 then
width = length(arg(argno))
s = d2x(arg(argno))
if prec \= 0 then
s = left(s, prec) /* Truncate or pad */
end
when r == "%" then
do
argno = argno - 1
end
otherwise
nop
end /* select */
if r \== "%" then
do
if left then
s = left(strip(s), width, pad) /* Justify */
else
s = right(strip(s), width, pad)
end
string = string || s
end /* do until(p >= len) */
return string
Disk-, Directory- and File-Handling
Get the current boot drive
/* ------------------------------------------------------------------ */
/* function: get the OS/2 boot drive */
/* */
/* call: bootDrive = GetOS2BootDrive() */
/* */
/* where: - */
/* */
/* returns: the OS/2 boot drive */
/* */
/* note: */
/* */
/* Note that there are functions to get the boot drive in many */
/* REXX DLLs available, for example in the RXLANUTIL DLL or in the */
/* new REXXUTIL DLL. introduced with Object-Oriented REXX */
/* */
GetOS2BootDrive: PROCEDURE expose (exposeList)
/* load the REXXUTIL functions */
call rxFuncAdd "SysLoadFuncs", "REXXUTIL", "SysLoadFuncs"
call SysLoadFuncs
/* install a local error handler */
signal on Syntax name GetOS2BootDrive1
boot_drive = ''
boot_drive = SysBootDrive()
GetOS2BootDrive1:
/* if SysBootDrive() failed, boot_drive is still */
/* empty */
/* SysBootDrive() is only in the newer versions */
/* of REXXUTIL! */
if boot_drive = '' then
do
/* You should do further tests to ensure that */
/* the result of this method is correct! */
parse upper value VALUE( "PATH",, prog.__env ) with "\OS2\SYSTEM" -2,
boot_drive +2
end /* if boot_drive = '' then */
return boot_drive
Check if a drive is ready
/* sample code to test if a drive is ready */
/* note: This routine does not work under Object-Oriented REXX */
/* */
/* [Tested with OBJREXX 6.00 12 Jul 1996] */
/* [Fixed in OBJREXX 6.00 26 Feb 1997 and newer versions] */
/* */
do forever
call lineOut , "Enter the name of the drive to test " ,
"(RETURN to end): "
thisDrive = strip( lineIn() )
if thisDrive = "" then
leave
if DriveReady( thisDrive ) = 1 then
say "The drive <" || thisDrive || "> is ready."
else
say "The drive <" || thisDrive || "> is not ready."
end /* do forever */
exit 0
/* ------------------------------------------------------------------ */
/* function: Check if a drive is ready */
/* */
/* call: DriveReady( testDrive ) */
/* */
/* where: testdrive - Name of the drive to test (e.g. "A:") */
/* */
/* returns: 1 - drive is ready */
/* 0 - drive is not ready */
/* */
/* note: This routine does not work under Object-Oriented REXX */
/* if the line AUTOFAIL=NO is missing in the CONFIG.SYS */
/* */
/* [Tested with OBJREXX 6.00 12 Jul 1996] */
/* [Fixed in OBJREXX 6.00 26 Feb 1997 and newer versions] */
/* */
DriveReady: PROCEDURE
parse arg driveToTest ":" .
thisRC = 0
/* install a temporary error handler to check */
/* if the drive is ready */
SIGNAL ON NOTREADY Name DriveReadyEnd
call stream driveToTest || ":\*", "D"
thisRC = 1
DriveReadyEnd:
RETURN thisRC
Check if a directory exists
/* sample code to test if a directory exists with restoring all */
/* directories */
do forever
call lineOut , "Enter the name of the directory to test " ,
"(RETURN to end): "
thisDir = strip( lineIn() )
if thisDir = "" then
leave
if DirExist( thisDir ) <> "" then
say "The directory <" || thisDir || "> exist."
else
say "The directory <" || thisDir || "> does not exist."
end /* do forever */
exit 0
/* ------------------------------------------------------------------ */
/* function: Check if a directory exists */
/* */
/* call: DirExist( testDir ) */
/* */
/* where: testDir - name of the directory to test */
/* */
/* returns: full name of the directory or "" if the directory */
/* don't exist */
/* */
DirExist: PROCEDURE
parse arg testDir .
/* init the return code */
thisRC = ""
/* test for missing or invalid parameter */
testDir = strip( testDir ) /* v3.20 */
if testDir = "" then /* v3.20 */
signal DirDoesNotExist /* v3.20 */
if right( testDir, 1 ) = '\' then /* v3.20 */
testDir = dbrright( testDir,1 ) /* v3.20 */
testDir = testDir || '\.' /* v3.20 */
/* install a temporary error handler to check */
/* if the drive with the directory to test is */
/* ready */
SIGNAL ON NOTREADY NAME DirDoesNotExist
/* check if the drive is ready */
call stream testDir || "\*", "D"
/* save the current directory of the current */
/* drive */
curDir = directory()
/* save the current directory of the drive */
/* with the directory to test */
curDir1 = directory( fileSpec( "drive", testDir ) )
/* test if the directory exists */
thisRC = directory( testDir )
/* restore the current directory of the drive */
/* with the directory to test */
call directory curDir1
/* restore the current directory of the */
/* current drive */
call directory curDir
DirDoesNotExist:
return thisRC
Work on directory trees
/* example for working on a directory tree without loading the dll */
/* REXXUTIL */
/* flush the REXX queue v3.20 */
do while queued() <> 0; parse pull; end;
/* put a list of all directories in the queue */
/* (use /FIFO to get the directories in the */
/* right order) */
"@dir /s/f /Ad C:\ 2>NUL | RXQUEUE /FIFO"
foundDirs.0 = 0
/* put the names of all found directories */
/* in a compound variable for further processing */
do while queued() <> 0
curDir = strip( lineIn( "QUEUE:" ) )
if curDir <> "" & ,
right( CurDir, 2 ) <> "\." & ,
right( CurDir, 3 ) <> "\.." then
do
j = foundDirs.0 + 1
foundDirs.j = curDir
foundDirs.0 = j
end /* if curDir <> "" then */
end /* do while queued <> 0 */
Create a directory(-tree)
/* ------------------------------------------------------------------ */
/* function: Create a directory(tree) */
/* */
/* call: CreateDirectory dirToCreate */
/* */
/* where: dirToCreate - directory to create */
/* */
/* example: call dirToCreate C:\TEST1\TEST2\TEST3\TEST4 */
/* will create the directories */
/* C:\TEST1 */
/* C:\TEST1\TEST2 */
/* C:\TEST1\TEST2\TEST3 */
/* and */
/* C:\TEST1\TEST2\TEST3\TEST4 */
/* */
/* returns: 0 - okay */
/* else OS Error */
/* */
CreateDirectory: PROCEDURE
parse arg dirToCreate
/* file or device for messages */
prog.__LogAll = "2>NUL 1>NUL"
/* init the return code */
thisRC = -1
/* check if the drive is ready */
SIGNAL ON NOTREADY Name CreateDirectoryError
call stream fileSpec( "drive", dirToCreate ) || "\*"
thisRC = 0
/* save the current directories */
curDir = directory()
curDir1 = directory( fileSpec( "drive", dirToCreate ) )
newDir = translate( dirToCreate, "\", "/" )
i = pos( ":", dirToCreate )
if i <> 0 then
do
parse var dirToCreate lwForTheDir ":" dirToCreate
if directory( lwForTheDir || ":\" ) = "" then
thisRC = 1
end /* if i <> 0 then */
if thisRC = 0 then
do
if right( dirToCreate, 1 ) <> "\" then
dirToCreate = dirToCreate || "\"
do until dirToCreate = "" | thisRC <> 0
parse var dirToCreate newSubDir "\" dirToCreate
dirToCreate = strip( dirToCreate )
if newSubDir = '' then /* v3.20 */
iterate /* v3.20 */
if directory( newSubDir ) = "" then
do
'@md "' || newSubDir || '"' prog.__LogAll /* v3.00 */
if rc = 2 | rc = 1 then
do
if stream( newSubDir , "c", "QUERY EXISTS" ) <> "" then
thisRC = rc
end /* if rc = 2 | rc = 1 */
else
thisRC = rc
if thisRC = 0 then
call directory newSubDir
end /* if directory( newSubDir ) = "" then */
end /* do until dirToCreate = "" | thisRC <> 0 */
end /* if thisRC = 0 then */
/* restore the current directories */
call directory curDir1
call directory curDir
CreateDirectoryError:
RETURN thisRC
Delete a directory(-tree)
/* ------------------------------------------------------------------ */
/* function: Delete all files in a directory and in all its */
/* sub directories! */
/* */
/* call: DeleteDirectory dirToDelete */
/* */
/* where: dirToDelete - directory to delete */
/* */
/* returns: 0 - okay */
/* -1 - drive not ready */
/* -2 - missing or invalid parameter v3.10 */
/* */
/* note: see also The function SysDestroyObject */
/* */
DeleteDirectory: PROCEDURE
parse arg dirToDelete
signal off error /* v3.20 */
signal off notready /* v3.20 */
signal off failure /* v3.20 */
if dirToDelete = '' then /* v3.10 */
do /* v3.10 */
/* check for missing parameter v3.10 */
thisRC = -2 /* v3.10 */
signal DeleteDirectoryError /* v3.10 */
end /* if */
/* file or device for messages */
prog.__LogAll = "2>NUL 1>NUL"
/* init the return code */
thisRC = -1
/* check if the drive is ready */
SIGNAL ON NOTREADY Name DeleteDirectoryError
call stream fileSpec( "drive", dirToDelete ) || "\*"
/* flush the REXX queue v3.20 */
do while queued() <> 0; parse pull; end;
/* put a list of all subdirectories in the */
/* queue */
"@dir /s/f /Ad " dirToDelete "2>NUL | RXQUEUE /lifo "
do while queued() <> 0
dirToDel = lineIn( "QUEUE:" )
if dirTodel <> "" & right( dirToDel,2 ) <> "\." & ,
right( dirToDel,3 ) <> "\.." then
do
/* also delete hidden, system and read-only files */
/* v3.20 */
'@attrib -r -s -h "' || dirToDel || '\*.*"' "2>NUL 1>NUL"
/* v3.20 */
if stream( dirToDel || '\*.*', 'c', 'QUERY EXISTS' ) <> '' then
'@del /n "' || dirToDel || '\*.*"' prog.__LogAll /* v3.00 */
if dirToDel <> dirToDelete then
'@rd "' || dirToDel || '"' prog.__LogAll /* v3.00 */
end /* if dirToDel <> "" then */
end /* do while queued <> 0 */
/* also delete hidden, system and read-only files */
/* v3.20 */
'@attrib -r -s -h "' || dirToDelete || '\*.*"' "2>NUL 1>NUL"
/* v3.20 */
if stream( dirToDelete || '\*.*', 'c', 'QUERY EXISTS' ) <> '' then
'@del /n "' || dirToDelete || '\*.*"' prog.__LogAll
'@rd "' || dirToDelete || '"' prog.__logAll /* v3.00 */
thisRC = 0
DeleteDirectoryError:
RETURN thisRC
Check if a name describes a device or a file
/* check if a name is the name of a file or the name of a device */
/* */
/* note: v2.40 */
/* */
/* Another method to test if a name is a device name or filename is */
/* */
/* testName = stream( testFileName, "c", "QUERY EXISTS" ) */
/* if fileSpec( "P", testName ) = "\DEV\" then */
/* say testFileName || " is a device." */
/* else */
/* say testFileName || " can be a file or directory." */
/* */
if stream( testFileName, "c", "QUERY EXISTS" ) <> "" then /* v2.00 */
if stream( testFileName, "c", "QUERY DATETIME" ) = "" then
say TestFileName || " is a device!"
else
say TestFileName || " is a file!"
else /* v2.00 */
say TestFileName || " does not exist!" /* v2.00 */
Check if a file exist
/* example code to check if a file exists. This function also checks, */
/* if the name is already used by a directory or a device (e.g. CON) */
/* Note that this routine won't find hidden or system files. */
do until fileName = ""
call charOut, "Enter a filename to check: "
fileName = lineIN()
say "The result of FileExist(" || fileName || ") is: " || ,
FileExist( fileName ) /* v2.60 */
end /* do until iLIne = "" */
exit 0
/* ------------------------------------------------------------------ */
/* function: Check if a file exists */
/* */
/* call: FileExist fileToTest */
/* */
/* where: fileToTest - name of the file to test */
/* */
/* returns: -2 - invalid parameter */
/* -1 - cannot detect (e.g. the drive is not ready) */
/* 0 - neither a file, a device nor a directory with this */
/* name exist */
/* 1 - the file exist */
/* 2 - a device driver with the name exists */
/* 3 - a directory with the name exists */
/* */
FileExist: PROCEDURE
parse arg fileName /* v2.90 */
/* install temporary error handler */
SIGNAL ON NOTREADY NAME FileExistError
SIGNAL ON FAILURE NAME FileExistError
SIGNAL ON ERROR NAME FileExistError
thisRC = -2 /* rc = -2 ->> invalid parameter */
/* check the parameter */
if strip( fileName ) <> "" then
do
thisRC = -1 /* rc = -1 ->> cannot detect the result */
/* check if the drive with the file is ready */
call stream fileName
/* turn of some error handling so we can */
/* determine if the given name is the name of */
/* a device (for example "LPT1") */
SIGNAL OFF NOTREADY
if stream( fileName, "c", "QUERY EXISTS" ) <> "" then
do
/* seems that the file exists -- check if */
/* it is a device */
if stream( fileName, "c", "QUERY DATETIME" ) == "" then
thisRC = 2 /* rc = 2 ->> this is a device name */
else
thisRC = 1 /* rc = 1 ->> this is a file name */
end /* if stream( ... */
else
do
/* seems that the file does not exist -- */
/* check if a directory with the name for the */
/* file exist */
/* save the current directory of the current */
/* drive */
thisDir = directory()
/* save the current directory of the drive */
/* with the file to check */
tempDir = directory( fileSpec( "Drive", fileName ) )
if directory( fileName ) <> "" then
thisRC = 3 /* rc = 3 ->> a dir with this name exists */
else
thisRC = 0 /* rc = 0 ->> neither a file, a device nor a */
/* dir with this name exists */
/* restore the current directory of the drive */
/* with the directory to check */
call directory tempDir
/* restore the current directory of the */
/* current drive */
call directory thisDir
end /* else */
end /* if strip( fileName ) <> "" then */
FileExistError:
RETURN thisRC
Get a name for a temporary file
/* routine to get an unique name for a temporary file */
/* example call */
tempFile = GetTempFile()
if tempFile <> "" then
say "The name of the temporary file is " || tempFile
else
say "Error: Cannot find a name for a temporary file!"
/* close & delete the temporary file */
if tempFile <> "" then
do
call stream tempFile, "C", "CLOSE"
'@del "' || tempFile || '"2>NUL 1>NUL'
end /* if tempFile <> "" then */
exit 0
/* ------------------------------------------------------------------ */
/* function: Get an unique name for a temporary file */
/* */
/* call: GetTempFile {noOfTrys} {,targetDir} */
/* */
/* where: noOfTrys - no. of trys */
/* (optional, def.: 999) */
/* targetDir - target dir for the file */
/* The directory must exist */
/* (optional, def.: use the environment */
/* variable TEMP, the environment variable */
/* TMP or the current directory [in this order])*/
/* */
/* returns: name of the file */
/* or "" if no name was found */
/* */
/* note: If GetTempFile finds a name for a new temporary file, */
/* it opens this file to prevent it from being used by */
/* another process! */
/* The name of the file is in the format $$nnn$$.TMP where */
/* nnn is a number between 000 and 999. */
/* */
/* RXTT v2.90: Added parameter noOfTrys and tPath */
/* */
GetTempFile: PROCEDURE expose (exposeList)
parse arg noOfTrys, tPath /* v2.90 */
if noOfTrys = '' | datatype( noOfTrys ) <> 'NUM' then /* v2.90 */
noOfTrys = 999 /* v2.90 */
if tPath = '' then /* v2.90 */
do
/* get the path for the temporary file */
tPath = value( "TEMP", , prog.__Env )
if tPath = "" then
tPath = value( "TMP", , prog.__Env )
if tPath = "" then
tPath = directory()
tPath = translate( tPath ) /* v2.20 */
end /* if */
tName = ""
/* save the current drive and directory */
CurDir = directory()
/* get the drive with the directory for the */
/* temporary files */
CurTDrive = filespec( "Drive", tPath )
/* save the current directory of the drive */
/* with the directory for temporary files! */
CurTDir = directory( curTDrive )
if directory( tPath ) = tPath then
do
/* restore the current directory of the drive */
/* with the directory for temporary files! */
call directory CurTDir
/* restore the current drive and directory */
call directory CurDir
tPath = strip( tPath, "B", '"' )
if right( tPath, 1 ) <> "\" then
tPath = tPath || "\"
do i=0 to noOfTrys
tName = tPath || "$$" || right( "000" || i, 3 ) || "$$" || ".TMP"
if stream( tName, "C", "QUERY EXISTS" ) = "" then
if stream( tName, "C",,
"OPEN WRITE" ) = "READY:" then /* v2.20 */
leave i
tName = ""
end /* do i=1 to noOfTrys */
end /* if directory() = ... */
RETURN tName
Search a file
/* routine(s) to search a file in the directories saved in an */
/* environment variable (e.g. "PATH") */
/* Note that this routine won't find hidden or system files. */
/* example call */
do forever
say "Enter a filename ("""" to abort):"
searchFile = strip( lineIn() )
if searchFile = '' then
leave
say "Result of SearchDataFile(" || searchFile || ") is: "
say " """ || SearchDataFile( searchFile ) || """"
say "Result of SearchProgram(" || searchFile || ") is: "
say " """ || SearchProgram( searchFile ) || """"
end /* do forever */
exit 0
/* ------------------------------------------------------------------ */
/* function: Search a file in the current directory and in the */
/* directories saved in an environment variable */
/* (e.g. PATH, DPATH, ... ) */
/* */
/* call: SearchFile( fileName, varName {,environment}) */
/* */
/* where: fileName - name of the file to search */
/* varName - name of the environment variable containing */
/* the directories to search */
/* environment - environment with the environment Variable */
/* (Def.: OS2ENVIRONMENT) */
/* */
/* returns: full name of the file or "" if not found */
/* */
SearchFile: PROCEDURE
parse arg fileName , envVar, environment
resultStr = ""
if fileName <> "" & envVar <> "" then
do
if environment = '' then
environment = "OS2ENVIRONMENT"
searchDirs = ".;" || value( envVar, , environment )
do forever
parse var searchDirs curSearchDir ";" searchDirs
curSearchDir = strip( curSearchDir )
if curSearchDir = "" then
iterate
if right( curSearchDir, 1 ) <> "\" & ,
right( curSearchDir, 1 ) <> ":" then
curSearchDir = curSearchDir || "\"
resultStr = stream( curSearchDir || fileName, "c", "QUERY EXISTS" )
if resultStr <> "" then
leave
if SearchDirs = "" then
leave
end /* do forverver */
end /* if fileName <> "" & ... */
RETURN resultStr
/* ------------------------------------------------------------------ */
/* function: Search a file in the current directory and in the */
/* directories saved in the environment variable PATH */
/* */
/* call: SearchProgram( progName {,environment}) */
/* */
/* where: progName - name of the program to search */
/* environment - environment with the environment Variable */
/* (Def.: OS2ENVIRONMENT) */
/* */
/* returns: full name of the program or "" if not found */
/* */
SearchProgram: PROCEDURE
parse arg progName , environment
resultStr = ""
if progName <> "" then
resultStr = SearchFile( progName, "PATH", environment )
RETURN resultStr
/* ------------------------------------------------------------------ */
/* function: Search a datafile in the current directory and in the */
/* directories saved in the environment variable DPATH */
/* */
/* call: SearchProgram( datafileName {,environment}) */
/* */
/* where: datafileName - name of the datafile to search */
/* environment - environment with the environment Variable */
/* (Def.: OS2ENVIRONMENT) */
/* */
/* returns: full name of the datafile or "" if not found */
/* */
SearchDataFile: PROCEDURE
parse arg dataFileName , environment
resultStr = ""
if dataFileName <> "" then
resultStr = SearchFile( datafileName, "DPATH", environment )
RETURN resultStr
Count lines in a file quickly
/* sample code to count the lines in a file quickly */
/* */
/* Source: I found this code in a message on the internet */
/* */
/* see also Count lines in a file quickly - 2 - */
/* */
/* name of the file */
testFile = "C:\OS2\INISYS.RC"
call time "r"
noOfLines = CountLines( testFile )
if noOfLines >= 0 then
do
say "The file " || testFile || " contains " || ,
noOfLines || " lines."
say "It took " || time( "e" ) || " seconds to get the number."
end /* if */
else
say "Error reading the file " || testFile
exit 0
/* ------------------------------------------------------------------ */
/* function: Get the number of lines in a file */
/* */
/* call: CountLines( fileName ) */
/* */
/* where: fileName - name of the file */
/* */
/* returns: n */
/* if n is >= 0 then it is the number of lines */
/* if n is < 0 an error occured */
/* */
CountLines: PROCEDURE
parse arg fileName
if stream( fileName, "c", "QUERY EXISTS" ) <> "" then
do
if stream( fileName, "c", "OPEN READ" ) = "READY:" then
do
thisRC = 0
do while chars( fileName ) > 0
thisRC = thisRC + ,
words( translate( charin( fileName, , 24020 ), " 1" ) )
end /* do while chars( fileName ) > 0 */
call stream fileName, "c", "close"
end /* if stream( fileName, "c", "open read" ) = "READY:" then */
else
thisRC = -1
end /* if stream( fileName, "c", "QUERY EXISTS" ) <> "" then */
else
thisRC = -2
RETURN thisRC
Count lines in a file quickly - 2 -
/* another sample code to count the lines in a file quickly */
/* */
/* Source: Oliver Heidelbach (see EMail Addresses) */
/* */
/* see also Count lines in a file quickly */
/* */
/* name of the file */
testFile = "C:\OS2\INISYS.RC"
call time "r"
noOfLines = CountLines( testFile )
if noOfLines >= 0 then
do
say "The file " || testFile || " contains " || ,
noOfLines || " lines."
say "It took " || time( "e" ) || " seconds to get the number."
end /* if */
else
say "Error reading the file " || testFile
exit 0
/* ------------------------------------------------------------------ */
/* function: Get the number of lines in a file */
/* */
/* call: CountLines( fileName ) */
/* */
/* where: fileName - name of the file */
/* */
/* returns: n */
/* if n is >= 0 then it is the number of lines */
/* if n is < 0 an error occured */
/* */
CountLines: PROCEDURE
parse arg fileName
if stream( fileName, "c", "QUERY EXISTS" ) <> "" then
do
if stream( fileName, "c", "OPEN READ" ) = "READY:" then
do
thisRC = 0
buf = charin( File,1,stream( filename,'c','query size' ) )
call stream filename, 'c', 'close'
buf = translate( buf,copies( ' ',10 ) || '1' || copies( ' ',245 ) )
buf = space( buf,0 )
thisRC = length( buf )
end /* if stream( fileName, "c", "open read" ) = "READY:" then */
else
thisRC = -1
end /* if stream( fileName, "c", "QUERY EXISTS" ) <> "" then */
else
thisRC = -2
RETURN thisRC
Read a file into a compound variable
/* sample code to read a text file into a compound variable */
/* name of the file to read */
testFile = "C:\OS2\INISYS.RC"
if ReadTextFile( testFile , "testStem" ) = 0 then
do
say "The file " || testFile || " contains " || ,
testStem.0 || " lines."
end /* if */
else
say "Error reading the file " || testFile
exit 0
/* ------------------------------------------------------------------ */
/* function: Read a text file into a compound variable */
/* */
/* call: ReadTextFile fileName, stem */
/* */
/* where: fileName - name of the file to read */
/* stem - stem for the lines of the file */
/* */
/* returns: 0 - okay, file read, the compound variable "stem" */
/* contains the lines of the file, */
/* "stem".0 = no. of lines */
/* else error reading the file */
/* */
ReadTextFile:
parse arg rtf.__fileName , rtf.__stemName
/* set the return code */
rc = -1
rtf.__i = i
if rtf.__fileName <> "" & rtf.__stemName <> "" then
do
if right( rtf.__stemName,1 ) <> "." then
rtf.__StemName = rtf.__StemName || "."
/* init the number of stem elements with 0 */
rtf.__iLine = rtf.__StemName || "0 = 0 "
interpret rtf.__iLine
/* set the return code 2 - file not found */
rc = 2
if stream( rtf.__fileName, "c", "QUERY EXISTS" ) <> "" then
do
/* set return code to 0 */
rc = 0
/* create the code to read the file */
rtf.__iLine = ,
"do i = 1 until lines( """ || rtf.__fileName || """ ) = 0; " ,
rtf.__StemName || "i = lineIn( '" || rtf.__fileName || "');" ,
"end;"
/* and now execute the code to read the file */
interpret rtf.__iLine
/* close the file */
call stream rtf.__fileName, "c", "CLOSE"
/* correct the no. of lines in stem.0 */
rtf.__iLine = rtf.__StemName || "0 = i "
interpret rtf.__iLine
end /* if stream( ... */
end /* if rtf.__fileName <> "" & ... */
i = rtf.__i
drop rtf.
RETURN rc
Write a stem using CharOut()
/* ------------------------------------------------------------------ */
/* function: Write a stem into a file */
/* */
/* call: rxWriteStem = stem_with_the_lines */
/* call RxWriteTextFile fileName {, lineSep } {,noEmpty} */
/* */
/* where: rxWriteStem - name of the stem with the file contents */
/* The name MUST end with a dot! */
/* fileName - name of the file to write */
/* LineSep - line separator chars */
/* (def.: "0D0A"x) */
/* noEmpty - if 1 empty lines are not written */
/* (def.: 0) */
/* */
/* returns: */
/* 0 -> ok */
/* 1 -> parameter missing */
/* 2 -> could not write the whole file */
/* 3 -> variable referenced in RxWriteStem is invalid */
/* 4 -> NOTREADY condition occured */
/* 5 -> ERROR condition occured */
/* 6 -> FAILURE condition occured */
/* 7 -> unexpected condition occured */
/* */
RxWriteTextFile: PROCEDURE expose (RxWriteStem) (exposeList)
/* install local error handlers */
SIGNAL ON NOTREADY Name RxWriteTextFileError
SIGNAL ON ERROR Name RxWriteTextFileError
SIGNAL ON FAILURE Name RxWriteTextFileError
/* init the return code */
thisRC = 3
/* check the name of the variable for the */
/* result */
if symbol( rxWriteStem || 0 ) = 'VAR' & right( rxWriteStem,1 ) = '.' then
do
/* get the parameter */
parse arg fileName , lineSep, noEmpty
/* remove leading and trailing blanks from the */
/* parameter */
fileName = strip( fileName )
lineSep = strip( lineSep )
/* use default line separator if necessary */
if arg( 2, 'o' ) = 1 "" then
lineSep = d2c(13) || d2c(10)
if noEmpty = "" then
noEmpty = 0
/* set the return code */
thisRC = 1
if fileName <> "" then
do
/* copy the stem into a variable */
fileContents = ''
do i = 1 to value( RxWriteStem || 0 )
curLine = value( RxWriteStem || i )
if noEmpty = 1 & curLine = '' then
iterate
fileContents = fileContents || curLine || lineSep
end /* do lineCount = 1 to value( RxWriteStem || 0 ) */
/* open the file */
call stream fileName, "c", "OPEN WRITE"
/* write the complete file using CharOut() */
tRC = CharOut( fileName, fileContents, 1 )
/* close the file */
call stream fileName, "c", "CLOSE"
if tRC <> 0 | result <> 'READY:' then
thisRC = 2
else
thisRC = 0
end /* if filename <> "" then */
end /* if */
RETURN thisRC
/* error exit for RxWriteTextFile */
RxWriteTextFileError:
/* turn off the condition that caused the error */
INTERPRET 'SIGNAL OFF ' condition( 'C' )
curCondition = condition('C')
select
when curCondition = 'NOTREADY' then
thisRC = 4
when curCondition = 'ERROR' then
thisRC = 5
when curCondition = 'FAILURE' then
thisRC = 6
otherwise
thisRC = 7
end /* select */
/* close the file */
call stream fileName, 'c', 'CLOSE'
return thisRC
Expand the function FILESPEC
/* sample code to extend the FILESPEC function with code to extract */
/* the extension of a fileName */
do until myInput = ""
say "New options for FILESPEC are:" /* v2.30 */
say "-----------------------------" /* v2.30 */
say "E - return the extension of the file" /* v2.30 */
say "B - return the name without the extension of the file" /* " */
say "H - return the drive & path of the file" /* v2.30 */
say "-----------------------------" /* v2.30 */
say "Enter the parameter for FILESPEC(option, fileName): "
myInput = strip( lineIn() )
if myInput <> "" then
do
parse var myInput myOption "," myfileName
say "The result of FILESPEC( " myOption "," myfileName ") is: "
say "<" || fileSpec( myOption, myfileName ) || ">"
end /* if myInput <> "" then */
end /* do until myInput = "" */
exit 0
/* ------------------------------------------------------------------ */
/* function: Extended FILESPEC function */
/* */
/* call: FileSpec option,fileName */
/* */
/* where: option */
/* */
/* - E{xtension} */
/* return the extension of the file */
/* */
/* - B{asename} */
/* returns the name of the file without extension */
/* */
/* - H{ome] */
/* returns the fully qualified path of the file */
/* (including the drive specifier; without the trailing */
/* backslash) */
/* */
/* All other values for "option" are processed by the */
/* original FILESPEC function. */
/* */
/* fileName */
/* - name of the file */
/* */
/* returns: if option = E{xtension}: */
/* the extension of the fileName or "" if none */
/* else */
/* if option = B{asename}: */
/* the name of the file without the path and extension */
/* else */
/* the return code of the original FILESPEC function */
/* or "SYNTAX ERROR" if called with invalid parameter */
/* */
/* note: To call the original FILESPEC function directly, use */
/* myResult = "FILESPEC"( option, fileName ) */
/* */
/* history: */
/* RXT&T v1.90 /bs */
/* - added the option B{asename} */
/* RXT&T v2.30 /bs */
/* - added the option H{ome} */
/* */
FileSpec: PROCEDURE
parse arg option, fileName
/* init the return code */
rc = "SYNTAX ERROR"
/* install a local error handler */
SIGNAL ON SYNTAX NAME FileSpecError
fileName = strip( fileName ) /* v2.30 */
option = translate( strip( option ) )
/* check the option code */
select
when abbrev( "EXTENSION", option ) = 1 then
do
/* process the new added option code */
i = lastPos( ".", fileName )
if i > lastPos( "\", fileName ) then
rc = substr( fileName, i+1 )
else
rc = ""
end /* when */
when abbrev( "BASENAME", option ) = 1 then /* v1.90 */
do /* v1.90 */
/* call the original FILESPEC function v1.90 */
/* to get the filename v1.90 */
rc = "FILESPEC"( "N", fileName ) /* v1.90 */
i = lastpos( ".", rc ) /* v1.90 */
if i <> 0 then /* v1.90 */
rc = substr( rc,1, i-1 ) /* v1.90 */
end /* when */ /* v1.90 */
when abbrev( "HOME", option ) = 1 then /* v2.30 */
do /* v2.30 */
rc = "FILESPEC"( "D", fileName ) ||, /* v2.30 */
"FILESPEC"( "P", fileName ) /* v2.30 */
if right( rc,1 ) = "\" then /* v2.30 */
rc = dbrright( rc,1 ) /* v2.30 */
end /* when */ /* v2.30 */
otherwise
do
/* call the original FILESPEC function */
rc = "FILESPEC"( option, fileName )
end /* otherwise */
end /* select */
FileSpecError:
RETURN rc
Maintain Multi-Value EAs in REXX
/* */
/* sample routine to maintain multi-Value EAs in REXX */
/* The Demo program uses the EA ".HISTORY" */
/* */
/* (see also Extended Attribute Data Types and EAs used by the WPS) */
/* */
say ""
say "Sample program to show the use of the routine FileHistory"
say ""
/* -------------------------- */
/* get the name of this file */
parse source . . thisFile
/* load the REXXUTIL functions for the demo */
call rxFuncAdd "SysLoadFuncs", "REXXUTIL", "SysLoadFuncs"
call SysLoadFuncs
/* -------------------------- */
say "Now detecting the history of this file ..."
call ReadEA1
/* -------------------------- */
say "Now initializing the history of this file with 1 value ..."
call FileHistory "ADD", thisFile,,
"Jim Bacon Created 01.01.1995", testStem
say " Result of FileHistory is " || result
call ReadEA
/* -------------------------- */
say "Now initializing the history of this file with 3 values ..."
MyStem1.0 = 3
MyStem1.0.codepage = 0
Mystem1.1 = "Jon Doe I Created 20.01.1995"
MyStem1.2 = "Jon Doe II Changed 22.01.1995"
MyStem1.3 = "Jon Doe III Changed 23.01.1995"
call FileHistory "SET", thisFile, "MyStem1"
say " Result of FileHistory is " || result
call ReadEA
/* -------------------------- */
say "Now adding another entry to the history of this file ..."
call FileHistory "ADD", thisFile, "Jim Bean Changed 24.01.1995"
say " Result of FileHistory is " || result
call ReadEA
/* -------------------------- */
say 'Now deleting the history of this file ...'
call FileHistory 'CLEAR', thisFile
say ' Result of FileHistory is ' || result
call ReadEA
/* -------------------------- */
exit
/* */
/* demo subroutine to read the EA */
/* */
ReadEA:
say "Now reading the new history of this file ..."
ReadEA1:
call FileHistory "GET", thisFile, "MyStem"
say " Result of FileHistory is " || result
say " The history list for this file contains " || ,
MyStem.0 || " entries."
say " The codepage of the history list is " || MyStem.0.CodePage || "."
do i = 1 to MyStem.0
say " History list entry no " || i || " is "
say " <" || myStem.i || ">"
end /* do i = 1 to MyStem.0 */
say "Press O to open the Settings Notebook of this file " || ,
"or any other key to continue"
UserInput = translate( SysGetKey( "NOECHO" ) )
if userInput = "O" then
do
call SysOpenObject thisFile, 2 , 1
say "Close the Settings Notebook and press any key to continue"
UserInput = translate( SysGetKey( "NOECHO" ) )
end /* if userInput = "O" then */
RETURN
/* ------------------------------------------------------------------ */
/* function: Get, Set or Clear the .HISTORY EA of a file */
/* */
/* call: FileHistory GET, filename, NewHistoryStem */
/* FileHistory ADD, filename, newHistoryEntry {,newStem} */
/* FileHistory SET, filename, CurHistoryStem */
/* FileHistory CLEAR, filename */
/* */
/* where: GET, ADD, SET, CLEAR */
/* - action: */
/* GET - get a list of the current entries */
/* ADD - add an entry to the list */
/* SET - replace the EA with a new list */
/* CLEAR - clear the whole list */
/* filename */
/* - name of the file */
/* NewHistoryStem */
/* - stem for the history list entries */
/* newStem */
/* - stem for the history list entries */
/* CurHistoryStem */
/* - stem _with_ the history list entries */
/* newHistoryEntry */
/* - new entry for the history list */
/* (ASCII string) */
/* */
/* returns: 0 - okay */
/* 1 - file not found */
/* 2 - EA is invalid */
/* 3 - CurHistoryStem.0 is invalid */
/* 4 - CurHistoryStem.0.codepage is invalid */
/* -1 - invalid parameter */
/* else - unexpected error */
/* */
/* notes: */
/* Do not add the trailing dot to the stem name! */
/* Format of the stems: */
/* history_stem.0 = number of entries */
/* history_stem.0.codepage = codepage of the EA */
/* (def.: 0, use default codepage) */
/* history_stem.n = entry n */
/* */
/* The format of the .HISTORY EA is: */
/* */
/* EA Type Code */
/* page Count */
/* +--------------------------------------------------+ */
/* | EAT_MVMT 0000 0002 | */
/* | EAT_ASCII 0017 Joe Created 2/10/88 | */
/* | EAT_ASCII 0017 Harry Changed 2/11/88 | */
/* +--------------------------------------------------+ */
/* EA Type length contents (ASCII string) */
/* */
/* All numeric values are WORDs in INTEL format. */
/* */
/* (see also Extended Attribute Data Types and EAs used by the WPS) */
/* */
/* FileHistory uses the prefix 'FH.' for all local variables. The */
/* local variables are dropped at the end of the routine! */
/* */
/* (c) 1996 Bernd Schemmer, Germany, EMail: Bernd.Schemmer@gmx.de */
/* */
FileHistory:
/* name of the EA to use */
/* note: change this variable to use the routine */
/* for the EAs .COMMENTS or .KEYPHRASES. */
/* In this case you must also delete the */
/* Codepage related code in this routine. */
FH.__EAName = '.HISTORY'
/* init the return code */
rc = 0
/* -------------------------- */
/* install local error handlers */
SIGNAL ON SYNTAX NAME FileHistoryEnd
SIGNAL ON ERROR NAME FileHistoryEnd
SIGNAL ON FAILURE NAME FileHistoryEnd
/* -------------------------- */
/* get the parameter */
parse upper arg FH.__action , FH.__file , FH.__variable , .
/* get the parameter for the ADD action */
parse arg , , FH.__newValue , FH.__tempStem
/* check the parameter */
select
/* check the action parameter */
when wordPos( FH.__action, 'GET ADD SET CLEAR' ) = 0 then
rc = -1
/* check the parameter for the stem variable */
when wordPos( FH.__action, 'GET ADD SET' ) <> 0 & ,
FH.__variable = '' then
rc = -1
/* check the parameter for the filename */
when FH.__file = '' then
rc = -1
/* test, if the file exists */
when stream( FH.__file, 'c', 'QUERY EXISTS' ) = '' then
rc = 1
/* check the number fields in the stem */
when FH.__action = 'SET' then
do
select
/* stem.0 must contain the number of entries */
when datatype( value( FH.__variable || '.0' ) ) <> 'NUM' then
rc = 3
/* use the default codepage if the entry */
/* stem.0.codepage is missing */
when symbol( FH.__variable || '.0.CodePage' ) <> 'VAR' then
call value FH.__variable || '.0.CodePage', 0
/* stem.0.codepage must be a numeric value if */
/* it exist */
when datatype( value( FH.__variable || '.0' ) ) <> 'NUM' then
rc = 4
otherwise
nop
end /* select */
end /* when */
when FH.__action = 'ADD' then
do
/* use the fourth parameter as name of the stem */
/* if entered */
if FH.__tempStem <> '' then
FH.__variable = FH.__tempStem
else
FH.__variable = 'FH.__tempStem'
end /* when */
otherwise
nop
end /* select */
/* -------------------------- */
if rc = 0 then
do
/* load the necessary REXXUTIL functions */
/* use special REXX names to avoid errors if */
/* another program drops the REXXUTIL functions */
call rxFuncAdd 'FH_SysGetEA', 'REXXUTIL', 'SysGetEA'
call rxFuncAdd 'FH_SysPutEA', 'REXXUTIL', 'SysPutEA'
/* -------------------------- */
/* constants for the EA type specifier */
FH.__EAT_BINARY = SwapWord( 'FFFE'x )
FH.__EAT_ASCII = SwapWord( 'FFFD'x )
FH.__EAT_BITMAP = SwapWord( 'FFFB'x )
FH.__EAT_METAFILE = SwapWord( 'FFFA'x )
FH.__EAT_ICON = SwapWord( 'FFF9'x )
FH.__EAT_EA = SwapWord( 'FFEE'x )
FH.__EAT_MVMT = SwapWord( 'FFDF'x )
FH.__EAT_MVST = SwapWord( 'FFDE'x )
FH.__EAT_ANS1 = SwapWord( 'FFDD'x )
/* -------------------------- */
if FH.__action = 'CLEAR' then
do
/* clear the history list */
/* v2.80 */
call FH_SysPutEA FH.__file, FH.__EAName, ''
end /* if FH.__action = 'CLEAR' then */
/* -------------------------- */
if wordPos( FH.__action, 'GET ADD' ) <> 0 then
do
/* read the EA */
/* init the stem for the EA values */
call value FH.__variable || '.', ''
call value FH.__variable || '.0' , 0
call value FH.__variable || '.0.codepage', 0
/* read the EA */
rc = FH_SysGetEA( FH.__file, FH.__EAName, FH.__historyEA )
if rc = 0 & FH.__historyEA <> '' then
do
/* split the EA into the header fields and the */
/* values */
parse var FH.__historyEA FH.__historyEAType +2 ,
FH.__historyEACodePage +2,
FH.__historyEACount +2 ,
FH.__historyEAValues
/* convert the count value to decimal */
FH.__historyEACount = c2d( SwapWord( FH.__HistoryEACount ) )
/* check the EA type */
if FH.__historyEAType = FH.__EAT_MVMT then
do
/* save the codepage */
call value FH.__variable || '.0.codepage' ,,
c2d( SwapWord( FH.__historyEACodePage ) )
/* split the value into separate fields */
do FH.__i = 1 to FH.__HistoryEACount while rc = 0
FH.__HistoryEACurType = substr( FH.__HistoryEAValues, 1, 2 )
if FH.__HistoryEACurType <> FH.__EAT_ASCII then
rc = 2 /* invalid EA type */
else
do
/* get the length of this value */
FH.__HistoryEACurLen = c2d( SwapWord( substr( FH.__HistoryEAValues, 3, 2 ) ) )
parse var FH.__historyEAValues 5 FH.__HistoryEACurVal,
+( FH.__HistoryEACurLen) ,
FH.__historyEAValues
/* save the value into the stem */
call value FH.__variable || '.' || FH.__i ,,
FH.__HistoryEACurVal
end /* else */
end /* do FH.__i = 1 to c2d( FH.__HistoryEACount ) while rc = 0 */
/* save the number of entries in stem.0 */
if rc = 0 then
call value FH.__variable || '.0' , FH.__i-1
end /* if FH.__historyEAType = FH.__EAT_MVST then */
else
rc = 2 /* invalid EA type */
end /* if rc = 0 then */
end /* if wordPos( FH.__action, 'GET ADD' ) <> 0 then */
/* -------------------------- */
if FH.__action = 'ADD' & rc = 0 then
do
/* add an entry */
FH.__i = value( FH.__variable || '.0' ) +1
call value FH.__variable || '.' || FH.__i , FH.__newValue
call value FH.__variable || '.0' , FH.__i
end /* if FH.__action = 'ADD' & rc = 0 then */
/* -------------------------- */
if wordPos( FH.__action, 'SET ADD' ) <> 0 & rc = 0 then
do
/* write the EA */
FH.__newEA = FH.__EAT_MVMT || ,
SwapWord( right( '00'x || d2c( value( FH.__variable || '.0.codepage' ) ), 2 ) ) || ,
SwapWord( right( '00'x || d2c( value( FH.__variable || '.0' ) ), 2 ) )
do FH.__i = 1 to value( FH.__variable || '.0' )
FH.__curEntry = value( FH.__variable || '.' || FH.__i )
FH.__newEA = FH.__newEA || ,
FH.__EAT_ASCII || ,
SwapWord( right( '00'x || d2c( length( FH.__curEntry ) ), 2 ) ) || ,
FH.__curEntry
end /* do FH.__i = 1 to value( FH.__variable || '.0' ) */
/* v2.80 */
call FH_SysPutEA FH.__file, FH.__EAName, FH.__newEA
rc = result
end /* if wordPos( FH.__action, 'SET ADD' ) <> 0 then */
end /* if rc = 0 then */
/* label for the local error handler */
FileHistoryEnd:
/* drop the REXXUTIL functions */
/* (possible and necessary because we use unique */
/* REXX names!) */
call rxFuncDrop 'FH_SysGetEA'
call rxFuncDrop 'FH_SysPutEA'
/* drop local variables */
drop FH.
RETURN rc
/* ------------------------------------------------------------------ */
/* function: Convert a hexadecimal WORD from LSB format to MSB format */
/* and vice versa */
/* */
/* call: SwapWord hexadecimal_word */
/* */
/* where: hexadecimal_word - input as hexadecimal word */
/* */
/* output: value in MSB format as hexadecimal word */
/* */
SwapWord: PROCEDURE
RETURN strip( translate( "12", arg(1), "21" ) )