AutoIt

Unicode Escape and Unescape Text in StringBuilder

Demonstrates options for unicode escaping non-us-ascii chars and emojis. AutoIt

Local $bSuccess = False

$oSbOriginal = ObjCreate("Chilkat.StringBuilder")
$bSuccess = $oSbOriginal.LoadFile("qa_data/txt/utf16_emojis_accented_jap.txt","utf-16")
If ($bSuccess = False) Then
    ConsoleWrite($oSbOriginal.LastErrorText & @CRLF)
    Exit
EndIf

; The above file contains the following text, which includes some emoji's,
; Japanese chars, and accented chars.

$oSb = ObjCreate("Chilkat.StringBuilder")
$oSb.AppendSb($oSbOriginal)

; Charset is not used for unicode escaping.  Set it to "utf-8", but it means nothing.
Local $sCharsetNotUsed = "utf-8"

; Indicate the desired format/style of Unicode escaping.
; Choose JSON-style (JavaScript-style) Unicode escape sequences by using "unicodeescape"
Local $sEncoding = "unicodeescape"

$oSb.Encode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; Output:
; \ud83e\udde0
; \ud83d\udd10
; \u2705
; \u26a0\ufe0f
; \u274c
; \u2713
; \u4e2d
; \u00e9 xyz \u00e0
; abc \u79c1 \u306f \u3093 ghi

; Revert back to the unescaped chars:
$oSb.Decode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; -----------------------------------------------------------------------------------------
; Do the same, but use uppercase letters (A-F) in the hex values.
$sEncoding = "unicodeescape-upper"
$oSb.Encode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; Output:
; \uD83E\uDDE0
; \uD83D\uDD10
; \u2705
; \u26A0\uFE0F
; \u274C
; \u2713
; \u4E2D
; \u00E9 xyz \u00E0
; abc \u79C1 \u306F \u3093 ghi

; Revert back to the unescaped chars:
$oSb.Decode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; -----------------------------------------------------------------------------------------
;  ECMAScript (JavaScript) �code point escape� syntax

$sEncoding = "unicodeescape-curly"
$oSb.Encode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; Output:
; \u{d83e}\u{dde0}
; \u{d83d}\u{dd10}
; \u{2705}
; \u{26a0}\u{fe0f}
; \u{274c}
; \u{2713}
; \u{4e2d}
; \u{00e9} xyz \u{00e0}
; abc \u{79c1} \u{306f} \u{3093} ghi

; Revert back to the unescaped chars:
$oSb.Decode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; -----------------------------------------------------------------------------------------
; Do the same, but use uppercase letters (A-F) in the hex values.
$sEncoding = "unicodeescape-curly-upper"
$oSb.Encode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; Output:
; \u{D83E}\u{DDE0}
; \u{D83D}\u{DD10}
; \u{2705}
; \u{26A0}\u{FE0F}
; \u{274C}
; \u{2713}
; \u{4E2D}
; \u{00E9} xyz \u{00E0}
; abc \u{79C1} \u{306F} \u{3093} ghi

; Revert back to the unescaped chars:
$oSb.Decode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; -----------------------------------------------------------------------------------------
; HTML hexadecimal character reference

$sEncoding = "unicodeescape-htmlhex"
$oSb.Encode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; Output:
; 🧠
; 🔐
; ✅
; ⚠️
; ❌
; ✓
; 中
; é xyz à
; abc 私 は ん ghi

; Revert back to the unescaped chars:
$oSb.Decode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; -----------------------------------------------------------------------------------------
; HTML decimal character reference

$sEncoding = "unicodeescape-htmldec"
$oSb.Encode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; Output:
; 🧠
; 🔐
; ✅
; ⚠️
; ❌
; ✓
; 中
; é xyz à
; abc 私 は ん ghi

; Revert back to the unescaped chars:
$oSb.Decode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; -----------------------------------------------------------------------------------------
; Unicode code point notation or U+ notation

$sEncoding = "unicodeescape-plus"
$oSb.Encode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; Output:
; u+1f9e0
; u+1f510
; u+2705
; u+26a0u+fe0f
; u+274c
; u+2713
; u+4e2d
; u+00e9 xyz u+00e0
; abc u+79c1 u+306f u+3093 ghi

; Chilkat cannot unescape the Unicode code point notation or U+ notation.
; For this style, Chilkat only goes in one direction, which is to escape.

; To emit uppercase hex, specify unicodeescape-plus-upper
$sEncoding = "unicodeescape-plus-upper"
; ...
; ...

$oSb.Clear 
$oSb.AppendSb($oSbOriginal)

; -----------------------------------------------------------------------------------------
; Hex in Angle Brackets

$sEncoding = "unicodeescape-angle"
$oSb.Encode($sEncoding,$sCharsetNotUsed)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; Output:
; <1f9e0>
; <1f510>
; <2705>
; <26a0><fe0f>
; <274c>
; <2713>
; <4e2d>
; <e9> xyz <e0>
; abc <79c1> <306f> <3093> ghi

; Chilkat cannot unescape the angle bracket notation.
; For this style, Chilkat only goes in one direction, which is to escape.

$oSb.Clear 
$oSb.AppendSb($oSbOriginal)