User-Defined Opcode Database

StrayLen

Returns the length of an array-string

Download UDO File

Description

Returns the number of elements in Stray. Elements are defined by two seperators as ASCII coded characters: isep1 defaults to 32 (= space), isep2 defaults to 9 (= tab). If just one seperator is used, isep2 equals isep1.

Syntax

ilen StrayLen Stray [, isep1 [, isep2]]

Initialization

Stray - a string as array
isep1 - the first seperator (default=32: space)
isep2 - the second seperator (default=9: tab)

Code

  opcode StrayLen, i, Sjj
;returns the number of elements in Stray. elements are defined by two seperators as ASCII coded characters: isep1 defaults to 32 (= space), isep2 defaults to 9 (= tab). if just one seperator is used, isep2 equals isep1
Stray, isepA, isepB xin
;;DEFINE THE SEPERATORS
isep1     =         (isepA == -1 ? 32 : isepA)
isep2     =         (isepA == -1 && isepB == -1 ? 9 : (isepB == -1 ? isep1 : isepB))
Sep1      sprintf   "%c", isep1
Sep2      sprintf   "%c", isep2
;;INITIALIZE SOME PARAMETERS
ilen      strlen    Stray
icount    =         0; number of elements
iwarsep   =         1
indx      =         0
 if ilen == 0 igoto end ;don't go into the loop if String is empty
loop:
Snext     strsub    Stray, indx, indx+1; next sign
isep1p    strcmp    Snext, Sep1; returns 0 if Snext is sep1
isep2p    strcmp    Snext, Sep2; 0 if Snext is sep2
 if isep1p == 0 || isep2p == 0 then; if sep1 or sep2
iwarsep   =         1; tell the log so
 else 				; if not 
  if iwarsep == 1 then	; and has been sep1 or sep2 before
icount    =         icount + 1; increase counter
iwarsep   =         0; and tell you are ot sep1 nor sep2 
  endif 
 endif	
          loop_lt   indx, 1, ilen, loop 
end:      xout      icount
  endop 

Examples

<CsoundSynthesizer>
<CsOptions>
-n -m0
</CsOptions>
<CsInstruments>

  opcode StrayLen, i, Sjj
;returns the number of elements in Stray. elements are defined by two seperators as ASCII coded characters: isep1 defaults to 32 (= space), isep2 defaults to 9 (= tab). if just one seperator is used, isep2 equals isep1
Stray, isepA, isepB xin
;;DEFINE THE SEPERATORS
isep1     =         (isepA == -1 ? 32 : isepA)
isep2     =         (isepA == -1 && isepB == -1 ? 9 : (isepB == -1 ? isep1 : isepB))
Sep1      sprintf   "%c", isep1
Sep2      sprintf   "%c", isep2
;;INITIALIZE SOME PARAMETERS
ilen      strlen    Stray
icount    =         0; number of elements
iwarsep   =         1
indx      =         0
 if ilen == 0 igoto end ;don't go into the loop if String is empty
loop:
Snext     strsub    Stray, indx, indx+1; next sign
isep1p    strcmp    Snext, Sep1; returns 0 if Snext is sep1
isep2p    strcmp    Snext, Sep2; 0 if Snext is sep2
 if isep1p == 0 || isep2p == 0 then; if sep1 or sep2
iwarsep   =         1; tell the log so
 else 				; if not 
  if iwarsep == 1 then	; and has been sep1 or sep2 before
icount    =         icount + 1; increase counter
iwarsep   =         0; and tell you are ot sep1 nor sep2 
  endif 
 endif	
          loop_lt   indx, 1, ilen, loop 
end:      xout      icount
  endop 

instr 1
ilen      StrayLen  {{these are "not" 5 elements -}}
          printf_i  "'%d'\n", 1, ilen
endin

instr 2
Stray     strget    p4
ipcnt     pcount
if ipcnt == 4 then
ilen      StrayLen  Stray
elseif ipcnt == 5 then
ilen      StrayLen  Stray, p5
elseif ipcnt == 6 then
ilen      StrayLen  Stray, p5, p6
endif		
          printf_i  "'%d'\n", 1, ilen
endin 

</CsInstruments>
<CsScore>
i 1 0 0.01 
i 2 0.01 0.01 "seperation just, by commas" 44
i . + . "seperation by,commas,or  spaces" 44 32
i . + . " 	 that" !
i . + . "	thut "
i . + . "no thing but you"
i . + . ""
i . + . " "
i . + . "	"
e
</CsScore>
</CsoundSynthesizer>

Credits

joachim heintz april 2010


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