Asc: Difference between revisions
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== The Function == | |||
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!macro Asc _STRING _RETURN | !macro Asc _STRING _RETURN | ||
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!define Asc "!insertmacro Asc" | !define Asc "!insertmacro Asc" | ||
Function Asc | Function Asc | ||
; Returns an Integer representing the character code corresponding to the first letter in a string. | ; Returns an Integer representing the character code corresponding to the first letter in a string. |
Revision as of 05:44, 12 August 2005
Author: nechai (talk, contrib) |
Description
Returns an Integer representing the character code corresponding to the first letter in a string.
Syntax
${Asc} "String" "String" ; string argument Stack 1 ; Ascii code
Usage
${Asc} "a" $0 ; returns 97 in $0 ${Asc} "AA" $0 ; returns 65 in $0
The Function
!macro Asc _STRING _RETURN ; save global registers Push $0 Push $1 Push $2 Push $3 ; store parameter Push ${_STRING} Call Asc ; restore global register Pop $3 Pop $2 Pop $1 Exch $0 Pop ${_RETURN} !macroend !define Asc "!insertmacro Asc" Function Asc ; Returns an Integer representing the character code corresponding to the first letter in a string. ; ; Syntax: ; ${Asc} "String" "Return" ; ; "String" ; string argument ; "Return" ; Variable where the ASCII code is returned. The function returns -1 if no ASCII code was found. ; ; e.g. ; ${Asc} "a" $0 ; returns 97 in $0 ; ${Asc} "AA" $0 ; returns 65 in $0 ; ; get parameter Pop $1 ; CHAR StrCpy $1 $1 1 IntOp $0 0 + 0 Asc.Do: IntFmt $2 %c $0 System::Call 'kernel32::lstrcmpA(t, t) i(r1,r2) .r3' StrCmp $3 "0" Asc.Exit IntOp $0 $0 + 1 StrCmp $0 256 0 Asc.Do StrCpy $0 "-1" Asc.Exit: FunctionEnd