Rosetta Code

SCRSIZE.REX: Difference between revisions

Page Discussion

SCRSIZE.REX (view source)

Revision as of 00:14, 30 January 2020

3,591 bytes added ,  4 years ago
m
changed a comment.
m (Added a link to the HELP for this REXX program. -- ~~~~)
m (changed a comment.)
 
(2 intermediate revisions by 2 users not shown)
Line 1:
The   '''SCRSIZE.REX'''   is a REXX program to emulate the   '''scrsize'''   bifBIF   (which is available under some REXXes) for some REXX programs.
<br><br>The help for the &nbsp; '''SCRSIZE''' &nbsp; REXX program is included here ──► [[SCRSIZE.HEL]].
<lang rexx>/*REXX pgm finds the SCRSIZE (screen size) of the console (terminal), returns 2 values.*/
<lang rexx>/**/trace o;parse arg !;if !all(arg()) then exit;if !cms then address '';signal on halt;signal on novalue;signal on syntax
 
trace off
/*┌────────────────────────────────────────────────────────────────────┐
┌─┘ └─┐
│ The SCRSIZE function is used to return the screen size (depth and │
│ width) for those REXX interpereters that don't support the SCRSIZE │
│ built-in function (BIF). │
│ │
│ │
│ [PC/REXX, R4, and ROO support the SCRSIZE bif.] │
│ │
│ Method: to save time, this program first attempts to find the DOS │
│ environmental variable LINES and COLUMNS. │
│ │
│ Failing that (in whole or in part), it then parses the results from │
│ the MODE CON (DOS) command and scans for the LINES and COLUMNS │
│ parameters. │
└─┐ ┌─┘
└────────────────────────────────────────────────────────────────────┘*/
 
parse arg !
if !cms then do /*if CMS, use $QWHAT pgm. */
if !all(arg()) then exit
'$QWHAT SCRDEPTH , 24';sd=rc /*get sd, default to 24. */
if !cms then address ''
'$QWHAT SCRWIDTH , 80';sw=rc /*get sw, default to 80. */
return sd sw /*return depth and width. */
end
if \!dos then return 24 80 /*not DOS? Return default.*/
 
signal on halt
@abc='abcdefghijklmnopqrstuvwxyz'
signal on noValue
@erase ='ERASE' /*point to dos ERASE cmd*/
signal on syntax
@find ='FIND' /*point to the dos FIND cmd*/
@MODE ='MODE' /*point to the dos MODE cmd*/
tfid= /*name of a temporary FID. */
 
/*Note: /i = ignore case.*/
@find_s ='/i "s"' /*find line with an "s". */
@find_l ='/i "l"' /*find line with an "l". */
 
/*┌────────────────────────────────────────────────────────────────────┐
findCols=1
┌─┘ └─┐
findRows=1
│ The SCRSIZE function is used to return the screen size (depth and │
sd=0
│ width) for those REXX interpreters that don't support the SCRSIZE │
sw=0
│ built-in function (BIF). │
│ │
│ │
│ [PC/REXX, PERSONAL REXX, R4, and ROO support the SCRSIZE BIF.] │
│ │
│ Method: to save time, this program first attempts to find the DOS │
│ environmental variable LINES and COLUMNS. │
│ │
│ Failing that (in whole or in part), it then parses the results from │
│ the MODE CON (DOS) command and scans for the LINES and COLUMNS │
│ parameters. │
└─┐ ┌─┘
└────────────────────────────────────────────────────────────────────┘*/
 
parse var !! _ . '(' ops ')' __
if _\=='' | __\=='' then call er 59
ops=space(ops)
 
if !cms then do /*if CMS, use $QWHAT program.*/
do while ops\==''; parse var ops _1 2 1 _ . 1 _o ops; upper _
'$QWHAT SCRDEPTH , 24'; sd= rc /*get the sd, default to 24.*/
select
'$QWHAT SCRWIDTH , 80'; sw= rc /*get the sw, default to 80.*/
when _==',' then nop
return sd sw /*return depth and width. */
when _1=='.' & pos("=",_)\==0 then tops=tops _o
end
when abbn('SCRWIDths' )|,
abbn('WIDths' )|,
abbn('WIDes' )|,
abbn('WIDs' )|,
abbn('COLums' )|,
abbn('COLs' ) then findcols=no()
when abbn('SCRWIDTHs' )|,
abbn('DEPTHs' )|,
abbn('DEPs' )|,
abbn('ROWs' )|,
abbn('LINEs' )|,
abbn('LINESizes' ) then findrows=no()
otherwise call er 55,_o
end
end
 
if \!dos then return 24 80 /*not DOS? Return default. */
 
tfid= /*name of a temporary FID. */
/*──────────────attempt to use the DOS environmental variable: COLUMNS. */
@abc= 'abcdefghijklmnopqrstuvwxyz' /*lowercase for options. */
if findcols then do
sw=p(!var('COLUMNS')) /*pick off the first word. */
if \isint(sw) then sw=0 /*if not whole #, then 0. */
sw=sw/1 /*decimal point ? remove.*/
end
 
@erase = 'ERASE' /*point to DOS ERASE command*/
@find = 'FIND' /* " " " FIND " */
@mode = 'MODE' /* " " " MODE " */
 
@pipe = '|' /*variable for pipe symbol. */
/*──────────────attempt to use the DOS environmental variable: LINES. */
@find_s = '/i "s:"' /*find record with s: */
if findrows then do
sd=p(!var('LINES')) /*pickthe off the/i first wordignores the case. */
if \isint(sd) then sd=0 /*if not whole #, then 0. */
sd=sd/1 /*decimal point ? remove.*/
end
 
findCols= 1
findRows= 1
sd= 0
sw= 0
 
parse var !! _ . '(' ops ')' __
/*──────────────if not defined, then use (DOS) MODE (writes to a file). */
if sd_\==0'' | sw__\==0'' then call er /*not defined? use MODE. */59
ops= space(ops)
do /*first, find temp. disk. */
call gettfid ,'$$$' /*get a TEMP id: !fn $$$ */
 
@mode 'con', /*issue MODE CON, then: */
'|' @find @find_s, /*find lines with an "s", */
'|' @find @find_l '>' tfid /*find lines with an "l". */
 
do while ops\==''
call linein tfid,1,0 /*point to record 1. */
parse var ops _1 2 1 _ . 1 _o ops
upper _
select
when _==',' then nop
when _1==. & pos("=",_)\==0 then tops= tops _o
when abbn('SCRWIDths' ) | ,
abbn('WIDths' ) | ,
abbn('WIDes' ) | ,
abbn('WIDs' ) | ,
abbn('COLums' ) | ,
abbn('COLs' ) then findcols= no()
when abbn('SCRWIDTHs' ) | ,
abbn('DEPTHs' ) | ,
abbn('DEPs' ) | ,
abbn('ROWs' ) | ,
abbn('LINEs' ) | ,
abbn('LINESizes' ) then findrows= no()
otherwise call er 55,_o
end /*select*/
end /*while*/
 
if !regina then call addr_with
do while sd==0 | sw==0 /*read file while sw|sw =0.*/
else call hard_way
if lines(tfid)==0 then leave /*No lines left? We're done*/
_=translate(linein(tfid),,'=:') /*translate = : --> blanks.*/
parse upper var _ yname yval . /*parse with name value. */
if yname=='COLUMNS' & sw==0 then sw=yval /*if COLUMNS, it's width.*/
if yname=='LINES' & sd==0 then sd=yval /*if LINES, it's depth.*/
end /*do while*/
 
return sd sw @erase tfid /*erasereturn the temp.depth file. and width. */
end
 
 
/*──────────────────────────────────────────────────────────────────────────────────────*/
if sd==0 then sd=50 /*just in case MODE failed.*/
ifhard_way: sw==0 then sw=80 /*justThe in case(DOS) MODE failed. command */
/*use positive values.(writes to a temp file). */
return abs(sd) abs(sw) call gettfid, '$$$' /*returnget a TEMP id: depth!fn and width.$$$ */
@mode 'con: |' @find @find_s '>' tfid /*find lines with s: */
call linein tfid, 1, 0 /*point to record 1. */
 
do while sd==0 | sw==0 /*read file while sw|sw =0. */
if lines(tfid)==0 then leave /*No lines left? We're done. */
_= translate( linein(tfid), , '=:') /*translate = : ──> blanks. */
parse upper var _ yname yval . /*parse with name value. */
if yname=='COLUMNS' & sw==0 then sw=yval /*if COLUMNS, it's width. */
if yname=='LINES' & sd==0 then sd=yval /* " LINES, " depth. */
end /*while*/
 
call lineout tfid /*close the (now) input file.*/
/*═════════════════════════════general 1-line subs════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════*/
@erase tfid /*erase the temporary file. */
!all:!!=!;!=space(!);upper !;call !fid;!nt=right(!var('OS'),2)=='NT';!cls=word('CLS VMFCLEAR CLRSCREEN',1+!cms+!tso*2);if arg(1)\==1 then return 0;if wordpos(!,'? ?SAMPLES ?AUTHOR ?FLOW')==0 then return 0;!call=']$H';call '$H' !fn !;!call=;return 1
 
!cal:if symbol('!CALL')\=="VAR" then !call=;return !call
if sd==0 then sd= 50 /*just in case MODE failed.*/
!env:!env='ENVIRONMENT';if !sys=='MSDOS'|!brexx|!r4|!roo then !env='SYSTEM';if !os2 then !env='OS2'!env;!ebcdic=1=='f0'x;return
if sw==0 then sw= 80 /* " " " " " */
!fid:parse upper source !sys !fun !fid . 1 . . !fn !ft !fm .;call !sys;if !dos then do;_=lastpos('\',!fn);!fm=left(!fn,_);!fn=substr(!fn,_+1);parse var !fn !fn '.' !ft;end;return word(0 !fn !ft !fm,1+('0'arg(1)))
 
!rex:parse upper version !ver !vernum !verdate .;!brexx='BY'==!vernum;!kexx='KEXX'==!ver;!pcrexx='REXX/PERSONAL'==!ver|'REXX/PC'==!ver;!r4='REXX-R4'==!ver;!regina='REXX-REGINA'==left(!ver,11);!roo='REXX-ROO'==!ver;call !env;return
return
!sys:!cms=!sys=='CMS';!os2=!sys=='OS2';!tso=!sys=='TSO'|!sys=='MVS';!vse=!sys=='VSE';!dos=pos('DOS',!sys)\==0|pos('WIN',!sys)\==0|!sys=='CMD';call !rex;return
 
!var:call !fid;if !kexx then return space(dosenv(arg(1)));return space(value(arg(1),,!env))
 
$fact!:procedure;parse arg x _ .;l=length(x);n=l-length(strip(x,'T',"!"));if n<=-n|_\==''|arg()\==1 then return x;z=left(x,l-n);if z<0|\isint(z) then return x;return $fact(z,n)
/*──────────────────────────────────────────────────────────────────────────────────────*/
$fact:procedure;parse arg x _ .;arg ,n ! .;n=p(n 1);if \isint(n) then n=0;if x<-n|\isint(x)|n<1|_||!\==''|arg()>2 then return x||copies("!",max(1,n));!=1;s=x//n;if s==0 then s=n;do j=s to x by n;!=!*j;end;return !
addr_with: @.= /*prepare stem, just in case.*/
$sfxa:parse arg ,s,m;arg u,c;if pos(left(s,2),u)\==0 then do j=length(s) to compare(s,c)-1 by -1;if right(u,j)\==left(c,j) then iterate;_=left(u,length(u)-j);if isnum(_) then return m*_;leave;end;return arg(1)
signal . /*do an old fashioned GO TO */
$sfxf:parse arg y;if right(y,1)=='!' then y=$fact!(y);if \isnum(y) then y=$sfxz();if isnum(y) then return y;return $sfxm(y)
.: where= sigL + 3 /*point to ADDRESS statement.*/
$sfxm:parse arg z;arg w;b=1000;if right(w,1)=='I' then do;z=shorten(z);w=z;upper w;b=1024;end;p=pos(right(w,1),'KMGTPEZYXWVU');if p==0 then return arg(1);n=shorten(z);r=num(n,f,1);if isnum(r) then return r*b**p;return arg(1)
/*this blank line must exist.*/
$sfxz:return $sfxa($sfxa($sfxa($sfxa($sfxa($sfxa(y,'PAIRs',2),'DOZens',12),'SCore',20),'GREATGRoss',1728),'GRoss',144),'GOOGOLs',1e100)
address system @mode 'CON:' @pipe @find @find_s with output stem @.
abb:arg abbu;parse arg abb;return abbrev(abbu,_,abbl(abb))
 
abbl:return verify(arg(1)'a',@abc,'M')-1
/*the above cmd only works with Regina.*/
abbn:parse arg abbn;return abb(abbn)|abb('NO'abbn)
 
er:parse arg _1,_2;call '$ERR' "14"p(_1) p(word(_1,2) !fid(1)) _2;if _1<0 then return _1;exit result
if rc\==0 then do /*did a DOS error happen? */
err:call er '-'arg(1),arg(2);return ''
parse source . . xfid /*obtain the program's name. */
erx:call er '-'arg(1),arg(2);exit ''
say
getdtfid:tfid=p(!var("TMP") !var('TEMP') homedrive()"\");if substr(tfid,2,1)==':'&substr(tfid,3,1)\=="\" then tfid=insert('\',t,2);return strip(tfid,'T',"\")'\'arg(1)'.'arg(2)
say '***error*** from: ' xfid /*tell where/what this is. */
gettfid:if tfid\=='' then return tfid;gfn=word(arg(1) !fn,1);gft=word(arg(2) 'ANS',1);tfid='TEMP';if !tso then tfid=gfn'.'gft;if !cms then tfid=gfn','gft",A4";if !dos then tfid=getdtfid(gfn,gft);return tfid
say 'return code ' rc " from the REXX statement number " where
halt:call er .1
say 'REXX statement:'
homedrive:if symbol('HOMEDRIVE')\=="VAR" then homedrive=p(!var('HOMEDRIVE') 'C:');return homedrive
say copies('-', 77)
int:int=num(arg(1),arg(2));if \isint(int) then call er 92,arg(1) arg(2);return int/1
say strip ( sourceLine(where) ) /*show the source line of pgm*/
isint:return datatype(arg(1),'W')
say copies('-', 77)
isnum:return datatype(arg(1),'N')
say
na:if arg(1)\=='' then call er 01,arg(2);parse var ops na ops;if na=='' then call er 35,_o;return na
exit rc /*exit with the return code. */
nai:return int(na(),_o)
end
nan:return num(na(),_o)
 
no:if arg(1)\=='' then call er 01,arg(2);return left(_,2)\=='NO'
if @.0=='' then @.0= 0 /*just in case MODE failed. */
novalue:!sigl=sigl;call er 17,!fid(2) !fid(3) !sigl condition('D') sourceline(!sigl)
 
num:procedure;parse arg x .,f,q;if x=='' then return x;if isnum(x) then return x/1;x=space(translate(x,,','),0);if \isnum(x) then x=$sfxf(x);if isnum(x) then return x/1;if q==1 then return x;if q=='' then call er 53,x f;call erx 53,x f
do j=1 for @.0 /*traipse through the output.*/
p:return word(arg(1),1)
_= translate( @.j, , '=:') /*translate = : ──> blanks.*/
s:if arg(1)==1 then return arg(3);return word(arg(2) 's',1)
parse upper var _ yname yval . /*parse with name value. */
shorten:procedure;parse arg a,n;return left(a,max(0,length(a)-p(n 1)))
if yname=='COLUMNS' then sw= yval /*if COLUMNS, it's width. */
syntax:!sigl=sigl;call er 13,!fid(2) !fid(3) !sigl !cal() condition('D') sourceline(!sigl)</lang>
if yname=='LINES' then sd= yval /*if LINES, it's depth. */
end /*j*/
 
if sd==0 | \datatype(sd, 'W') then sd= 50 /*just in case MODE failed.*/
if sw==0 | \datatype(sw, 'W') then sw= 80 /* " " " " " */
 
return
 
 
/*──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────*/
!all: !!=!;!=space(!);upper !;call !fid;!nt=right(!var('OS'),2)=='NT';!cls=word('CLS VMFCLEAR CLRSCREEN',1+!cms+!tso*2);if arg(1)\==1 then return 0;if wordpos(!,'? ?SAMPLES ?AUTHOR ?FLOW')==0 then return 0;!call=']$H';call '$H' !fn !;!call=;return 1
!cal: if symbol('!CALL')\=="VAR" then !call=; return !call
!env: !env='ENVIRONMENT'; if !sys=='MSDOS' | !brexx | !r4 | !roo then !env= 'SYSTEM'; if !os2 then !env= 'OS2'!env; !ebcdic= 3=='f3'x; if !crx then !env= 'DOS'; return
!fid: parse upper source !sys !fun !fid . 1 . . !fn !ft !fm .; call !sys; if !dos then do; _=lastpos('\',!fn); !fm=left(!fn,_); !fn=substr(!fn,_+1); parse var !fn !fn '.' !ft; end; return word(0 !fn !ft !fm, 1 + ('0'arg(1) ) )
!rex: parse upper version !ver !vernum !verdate .; !brexx= 'BY'==!vernum; !kexx= 'KEXX'==!ver; !pcrexx= 'REXX/PERSONAL'==!ver | 'REXX/PC'==!ver; !r4= 'REXX-R4'==!ver; !regina= 'REXX-REGINA'==left(!ver,11); !roo= 'REXX-ROO'==!ver;call !env;return
!sys: !cms= !sys=='CMS'; !os2= !sys=='OS2'; !tso= !sys=='TSO' | !sys=='MVS'; !vse= !sys=='VSE'; !dos= pos('DOS', !sys)\==0 | pos('WIN', !sys)\==0 | !sys=='CMD'; !crx= left(!sys, 6)=='DOSCRX'; call !rex; return
!var: call !fid; if !kexx then return space( dosenv( arg(1) ) ); return space( value(arg(1), , !env) )
$fact!: procedure; parse arg x _ .; l= length(x); n= l - length( strip(x, 'T', "!") ); if n<=-n|_\==''|arg()\==1 then return x; z=left(x,l-n); if z<0|\isInt(z) then return x; return $fact(z, n)
$fact: procedure; parse arg x _ .; arg ,n ! .; n= p(n 1); if \isInt(n) then n=0; if x<-n | \isInt(x) | n<1 | _ || !\=='' | arg()>2 then return x || copies("!", max(1,n)); !=1; s=x//n; if s==0 then s= n; do j=s to x by n; !=!*j; end; return !
$sfxa: parse arg ,s,m;arg u,c;if pos(left(s,2),u)\==0 then do j=length(s) to compare(s,c)-1 by -1;if right(u,j)\==left(c,j) then iterate;_=left(u,length(u)-j);if isNum(_) then return m*_; leave; end; return arg(1)
$sfxf: parse arg y;if right(y,1)=='!' then y=$fact!(y); if \isNum(y) then y= $sfxz(); if isNum(y) then return y; return $sfxm(y)
$sfxm: parse arg z; arg w; b=1000; if right(w, 1)=='I' then do; z= shorten(z); w=z; upper w; b=1024; end; p= pos( right(w, 1), 'KMGTPEZYXWVU'); if p==0 then return arg(1); n=shorten(z); r=num(n,f,1); if isNum(r) then return r*b**p; return arg(1)
$sfxz: return $sfxa( $sfxa( $sfxa( $sfxa( $sfxa( $sfxa(y,'PAIRs',2), 'DOZens', 12), 'SCore', 20), 'GREATGRoss', 1728), 'GRoss', 144), 'GOOGOLs', 1e100)
abb: arg abbu; parse arg abb; return abbrev( abbu, _, abbl(abb) )
abbl: return verify( arg(1)'a', @abc, 'M') - 1
abbn: parse arg abbn; return abb(abbn) | abb('NO'abbn)
er: parse arg _1,_2; call '$ERR' "14"p(_1) p(word(_1, 2) !fid(1) ) _2; if _1<0 then return _1; exit result
err: call er '-'arg(1), arg(2); return ''
erx: call er '-'arg(1), arg(2); exit ''
getdtfid: tfid= p(!var("TMP") !var('TEMP') homedrive()"\"); if substr(tfid, 2, 1)==':' & substr(tfid, 3, 1)\=="\" then tfid= insert('\', t, 2); return strip(tfid, 'T', "\")'\'arg(1)'.'arg(2)
getTFID: if symbol('TFID')=='LIT' then tfid=; if tfid\=='' then return tfid; gfn=word(arg(1) !fn,1); gft=word(arg(2) 'ANS',1); tfid='TEMP';if !tso then tfid=gfn'.'gft;if !cms then tfid=gfn','gft",A4";if !dos then tfid=getdTFID(gfn,gft); return tfid
halt: call er .1
homedrive: if symbol('HOMEDRIVE')\=="VAR" then homedrive= p(!var('HOMEDRIVE') 'C:'); return homedrive
int: int= num(arg(1), arg(2)); if \isInt(int) then call er 92, arg(1) arg(2); return int/1
isInt: return datatype( arg(1), 'W')
isNum: return datatype( arg(1), 'N')
na: if arg(1)\=='' then call er 01, arg(2); parse var ops na ops; if na=='' then call er 35,_o; return na
nai: return int(na(), _o)
nan: return num(na(), _o)
no: if arg(1)\=='' then call er 01,arg(2); return left(_,2)\=='NO'
noValue: !sigl= sigl; call er 17,!fid(2) !fid(3) !sigl condition('D') sourceline(!sigl)
num: procedure; parse arg x .,f,q; if x=='' then return x; if isNum(x) then return x/1; x=space(translate(x,,','),0); if \isNum(x) then x=$sfxf(x); if isNum(x) then return x/1; if q==1 then return x; if q=='' then call er 53,x f;call erx 53,x f
p: return word( arg(1), 1)
s: if arg(1)==1 then return arg(3); return word( arg(2) 's', 1)
shorten: procedure; parse arg a,n; return left(a, max(0, length(a) - p(n 1) ) )
syntax: !sigl= sigl; call er 13,!fid(2) !fid(3) !sigl !cal() condition('D') sourceline(!sigl)
</lang>
 
[[Category:REXX library routines]]
Retrieved from "https://rosettacode.org/wiki/Special:MobileDiff/225429...225432"