WordFind

Author: Instructor (talk, contrib)

Page for NSIS 2.07 and below users

You can use the latest version of headers (recommended) or the following function code (put the function code in your script before calling it)

Function Description

____________________________________________________________________________
 
                            WordFind v2.0
____________________________________________________________________________
 
 
Multi-features string function.
 
 
Strings:
"[word+1][delimiter][word+2][delimiter][word+3]..."
"[delimiter][word+1][delimiter][word+2][delimiter]..."
"[delimiter][delimiter][word+1][delimiter][delimiter][delimiter]..."
"...[word-3][delimiter][word-2][delimiter][word-1]"
"...[delimiter][word-2][delimiter][word-1][delimiter]"
"...[delimiter][delimiter][word-1][delimiter][delimiter][delimiter]"
 
Syntax: 
${WordFind} "[string]" "[delimiter]" "[E][options]" $var
 
"[string]"         ;[string]
                   ;  input string
"[delimiter]"      ;[delimiter]
                   ;  one or several symbols
"[E][options]"     ;[options]
                   ;  +number   : word number from start
                   ;  -number   : word number from end
                   ;  +number}  : delimiter number from start
                   ;              all space after this
                   ;              delimiter to output
                   ;  +number{  : delimiter number from start
                   ;              all space before this
                   ;              delimiter to output
                   ;  +number}} : word number from start
                   ;              all space after this word
                   ;              to output
                   ;  +number{{ : word number from start
                   ;              all space before this word
                   ;              to output
                   ;  +number{} : word number from start
                   ;              all space before and after
                   ;              this word (word exclude)
                   ;  +number*} : word number from start
                   ;              all space after this
                   ;              word to output with word
                   ;  +number{* : word number from start
                   ;              all space before this
                   ;              word to output with word
                   ;  #         : sum of words to output
                   ;  *         : sum of delimiters to output
                   ;  /word     : number of word to output
                   ;
                   ;[E]
                   ;  with errorlevel output
                   ;  IfErrors:
                   ;     $var=1  delimiter not found
                   ;     $var=2  no such word number
                   ;     $var=3  syntax error (Use: +1,-1},#,*,/word,...)
                   ;[]
                   ;  no errorlevel output (default)
                   ;  If some errors found then (result=input string)
                   ;
$var               ;output (result)
 
Note:
-Accepted numbers 1,01,001,...

Example (Find word by number):

Section
	${WordFind} "C:\io.sys C:\Program Files C:\WINDOWS" " C:\" "-02" $R0
	; $R0="Program Files"
SectionEnd

Example (Delimiter exclude):

Section
	${WordFind} "C:\io.sys C:\logo.sys C:\WINDOWS" "sys" "-2}" $R0
	; $R0=" C:\logo.sys C:\WINDOWS"
SectionEnd

Example (Sum of words):

Section
	${WordFind} "C:\io.sys C:\logo.sys C:\WINDOWS" " C:\" "#" $R0
	; $R0="3"
SectionEnd

Example (Sum of delimiters):

Section
	${WordFind} "C:\io.sys C:\logo.sys C:\WINDOWS" "sys" "*" $R0
	; $R0="2"
SectionEnd

Example (Find word number):

Section
	${WordFind} "C:\io.sys C:\Program Files C:\WINDOWS" " " "/Files" $R0
	; $R0="3"
SectionEnd

Example ( }} ):

Section
	${WordFind} "C:\io.sys C:\logo.sys C:\WINDOWS" " " "+2}}" $R0
	; $R0=" C:\WINDOWS"
SectionEnd

Example ( {} ):

Section
	${WordFind} "C:\io.sys C:\logo.sys C:\WINDOWS" " " "+2{}" $R0
	; $R0="C:\io.sys C:\WINDOWS"
SectionEnd

Example ( *} ):

Section
	${WordFind} "C:\io.sys C:\logo.sys C:\WINDOWS" " " "+2*}" $R0
	; $R0="C:\logo.sys C:\WINDOWS"
SectionEnd

Example (Get parent directory):

Section
	StrCpy $R0 "C:\Program Files\NSIS\NSIS.chm"
;	           "C:\Program Files\NSIS\Include\"
;	           "C:\\Program Files\\NSIS\\NSIS.chm"
 
	${WordFind} "$R0" "\" "-2{*" $R0
	; $R0="C:\Program Files\NSIS"
	;     "C:\\Program Files\\NSIS"
SectionEnd

Example (Coordinates):

Section
	${WordFind} "C:\io.sys C:\logo.sys C:\WINDOWS" ":\lo" "E+1{" $R0
	; $R0="C:\io.sys C"
	IfErrors end
 
	StrLen $0 $R0             ; $0 = Start position of word (11)
	StrLen $1 ':\lo'          ; $1 = Word leght (4)
	; StrCpy $R0 $R1 $1 $0    ; $R0 = :\lo
 
	end:
SectionEnd

Example (With errorlevel output):

Section
	${WordFind} "[string]" "[delimiter]" "E[options]" $R0
 
	IfErrors 0 end
	StrCmp $R0 1 0 +2       ; errorlevel 1?
	MessageBox MB_OK 'delimiter not found' IDOK end
	StrCmp $R0 2 0 +2       ; errorlevel 2?
	MessageBox MB_OK 'no such word number' IDOK end
	StrCmp $R0 3 0 +2       ; errorlevel 3?
	MessageBox MB_OK 'syntax error'
 
	end:
SectionEnd

Example (Without errorlevel output):

Section
	${WordFind} "C:\io.sys C:\logo.sys" "_" "+1" $R0
 
	; $R0="C:\io.sys C:\logo.sys" (error: delimiter "_" not found)
SectionEnd

Example (If found):

Section
	${WordFind} "C:\io.sys C:\logo.sys" ":\lo" "E+1{" $R0
 
	IfErrors notfound found
	found:
	MessageBox MB_OK 'Found' IDOK end
	notfound:
	MessageBox MB_OK 'Not found'
 
	end:
SectionEnd

Example (If found 2):

Section
	${WordFind} "C:\io.sys C:\logo.sys" ":\lo" "+1{" $R0
 
	StrCmp $R0 "C:\io.sys C:\logo.sys" notfound found        ; error?
	found:
	MessageBox MB_OK 'Found' IDOK end
	notfound:
	MessageBox MB_OK 'Not found'
 
	end:
SectionEnd

Example (To accept one word in string if delimiter not found):

Section
	StrCpy $0 'OneWord'
	StrCpy $1 1
 
	loop:
	${WordFind} "$0" " " "E+$1" $R0
	IfErrors 0 code
	StrCmp $1$R0 11 0 error
	StrCpy $R0 $0
	goto end
 
	code:
	; ...
	IntOp $1 $1 + 1
	goto loop
 
	error:
	StrCpy $1 ''
	StrCpy $R0 ''
 
	end:
	; $R0="OneWord"
SectionEnd

Function Code

Function WordFind
	!define WordFind `!insertmacro WordFindCall`
 
	!macro WordFindCall _STRING _DELIMITER _OPTION _RESULT
		Push `${_STRING}`
		Push `${_DELIMITER}`
		Push `${_OPTION}`
		Call WordFind
		Pop ${_RESULT}
	!macroend
 
	Exch $1
	Exch
	Exch $0
	Exch
	Exch 2
	Exch $R0
	Exch 2
	Push $2
	Push $3
	Push $4
	Push $5
	Push $6
	Push $7
	Push $8
	Push $9
	Push $R1
	ClearErrors
 
	StrCpy $9 ''
	StrCpy $2 $1 1
	StrCpy $1 $1 '' 1
	StrCmp $2 'E' 0 +3
	StrCpy $9 E
	goto -4
 
	StrCpy $3 ''
	StrCmp $2 '+' +6
	StrCmp $2 '-' +5
	StrCmp $2 '/' restart
	StrCmp $2 '#' restart
	StrCmp $2 '*' restart
	goto error3
 
	StrCpy $4 $1 1 -1
	StrCmp $4 '*' +4
	StrCmp $4 '}' +3
	StrCmp $4 '{' +2
	goto +4
	StrCpy $1 $1 -1
	StrCpy $3 '$4$3'
	goto -7
	StrCmp $3 '*' error3
	StrCmp $3 '**' error3
	StrCmp $3 '}{' error3
	IntOp $1 $1 + 0
	StrCmp $1 0 error2
 
	restart:
	StrCmp $R0 '' error1
	StrCpy $4 0
	StrCpy $5 0
	StrCpy $6 0
	StrLen $7 $0
	goto loop
 
	preloop:
	IntOp $6 $6 + 1
 
	loop:
	StrCpy $8 $R0 $7 $6
	StrCmp $8$5 0 error1
	StrCmp $8 '' +2
	StrCmp $8 $0 +5 preloop
	StrCmp $3 '{' minus
	StrCmp $3 '}' minus
	StrCmp $2 '*' minus
	StrCmp $5 $6 minus +5
	StrCmp $3 '{' +4
	StrCmp $3 '}' +3
	StrCmp $2 '*' +2
	StrCmp $5 $6 nextword
	IntOp $4 $4 + 1
	StrCmp $2$4 +$1 plus
	StrCmp $2 '/' 0 nextword
	IntOp $8 $6 - $5
	StrCpy $8 $R0 $8 $5
	StrCmp $1 $8 0 nextword
	StrCpy $R1 $4
	goto end
	nextword:
	IntOp $6 $6 + $7
	StrCpy $5 $6
	goto loop
 
	minus:
	StrCmp $2 '-' 0 sum
	StrCpy $2 '+'
	IntOp $1 $4 - $1
	IntOp $1 $1 + 1
	IntCmp $1 0 error2 error2 restart
	sum:
	StrCmp $2 '#' 0 sumdelim
	StrCpy $R1 $4
	goto end
	sumdelim:
	StrCmp $2 '*' 0 error2
	StrCpy $R1 $4
	goto end
 
	plus:
	StrCmp $3 '' 0 +4
	IntOp $6 $6 - $5
	StrCpy $R1 $R0 $6 $5
	goto end
	StrCmp $3 '{' 0 +3
	StrCpy $R1 $R0 $6
	goto end
	StrCmp $3 '}' 0 +4
	IntOp $6 $6 + $7
	StrCpy $R1 $R0 '' $6
	goto end
	StrCmp $3 '{*' +2
	StrCmp $3 '*{' 0 +3
	StrCpy $R1 $R0 $6
	goto end
	StrCmp $3 '*}' +2
	StrCmp $3 '}*' 0 +3
	StrCpy $R1 $R0 '' $5
	goto end
	StrCmp $3 '}}' 0 +3
	StrCpy $R1 $R0 '' $6
	goto end
	StrCmp $3 '{{' 0 +3
	StrCpy $R1 $R0 $5
	goto end
	StrCmp $3 '{}' 0 error3
	StrLen $3 $R0
	StrCmp $3 $6 0 +3
	StrCpy $0 ''
	goto +2
	IntOp $6 $6 + $7
	StrCpy $8 $R0 '' $6
	StrCmp $4$8 1 +6
	StrCmp $4 1 +2 +7
	IntOp $6 $6 + $7
	StrCpy $3 $R0 $7 $6
	StrCmp $3 '' +2
	StrCmp $3 $0 -3 +3
	StrCpy $R1 ''
	goto end
	StrCmp $5 0 0 +3
	StrCpy $0 ''
	goto +2
	IntOp $5 $5 - $7
	StrCpy $3 $R0 $5
	StrCpy $R1 '$3$0$8'
	goto end
 
	error3:
	StrCpy $R1 3
	goto error
	error2:
	StrCpy $R1 2
	goto error
	error1:
	StrCpy $R1 1
	error:
	StrCmp $9 'E' 0 +3
	SetErrors
 
	end:
	StrCpy $R0 $R1
 
	Pop $R1
	Pop $9
	Pop $8
	Pop $7
	Pop $6
	Pop $5
	Pop $4
	Pop $3
	Pop $2
	Pop $1
	Pop $0
	Exch $R0
FunctionEnd