; StrContains
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; This function does a case sensitive searches for an occurrence of a substring in a string.
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; It returns the substring if it is found.
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; Otherwise it returns null("").
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; Written by kenglish_hi
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; Adapted from StrReplace written by dandaman32
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Var STR_HAYSTACK
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Var STR_NEEDLE
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Var STR_CONTAINS_VAR_1
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Var STR_CONTAINS_VAR_2
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Var STR_CONTAINS_VAR_3
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Var STR_CONTAINS_VAR_4
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Var STR_RETURN_VAR
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Function StrContains
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Exch $STR_NEEDLE
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Exch 1
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Exch $STR_HAYSTACK
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; Uncomment to debug
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;MessageBox MB_OK 'STR_NEEDLE = $STR_NEEDLE STR_HAYSTACK = $STR_HAYSTACK '
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StrCpy $STR_RETURN_VAR ""
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StrCpy $STR_CONTAINS_VAR_1 -1
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StrLen $STR_CONTAINS_VAR_2 $STR_NEEDLE
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StrLen $STR_CONTAINS_VAR_4 $STR_HAYSTACK
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loop:
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IntOp $STR_CONTAINS_VAR_1 $STR_CONTAINS_VAR_1 + 1
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StrCpy $STR_CONTAINS_VAR_3 $STR_HAYSTACK $STR_CONTAINS_VAR_2 $STR_CONTAINS_VAR_1
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StrCmp $STR_CONTAINS_VAR_3 $STR_NEEDLE found
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StrCmp $STR_CONTAINS_VAR_1 $STR_CONTAINS_VAR_4 done
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Goto loop
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found:
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StrCpy $STR_RETURN_VAR $STR_NEEDLE
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Goto done
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done:
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Pop $STR_NEEDLE ;Prevent "invalid opcode" errors and keep the
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Exch $STR_RETURN_VAR
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FunctionEnd
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!macro _StrContainsConstructor OUT NEEDLE HAYSTACK
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Push `${HAYSTACK}`
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Push `${NEEDLE}`
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Call StrContains
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Pop `${OUT}`
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!macroend
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!define StrContains '!insertmacro "_StrContainsConstructor"'
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