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jusb3

Unicode decoding

9 posts in this topic

#1 ·  Posted (edited)

How can I decode string string containing unicode? For example "meru00e4u00e4" would turn out as "merää".

Is there any build in function for that?

Edited by jusb3

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Are you sure that's correct? As I thought 34 decimal was ".

Local $sString = "mer\u0034\u0034"
Local $aSRE = StringRegExp($sString, "\\u(\d+)", 3)
For $i = 0 To UBound($aSRE) - 1
    $sString = StringReplace($sString, "\u" & $aSRE[$i], ChrW(Int($aSRE[$i])))
Next
ConsoleWrite($sString & @CRLF)
ClipPut($sString)

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Updated: 04/09/2015

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Are you sure that's correct? As I thought 34 decimal was ".

Local $sString = "mer\u0034\u0034"
Local $aSRE = StringRegExp($sString, "\\u(\d+)", 3)
For $i = 0 To UBound($aSRE) - 1
    $sString = StringReplace($sString, "\u" & $aSRE[$i], ChrW(Int($aSRE[$i])))
Next
ConsoleWrite($sString & @CRLF)
ClipPut($sString)

Oh sorry, It should had been u00e4, it's hex value. But I will take a look at your example.

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#4 ·  Posted (edited)

Where can I find such strange strings? It doesn't look like any standard format I have seen before. Did you invent it? - 'meru00e4u00e4'. BTW the exact referenced string can be encoded as ansi. It looks like a regular expression.

The following variant would appear to be more consistant.

'u006Du0065u0072u00E4u00E4'

Perhaps you (or someone) could enlighten me where this format is used.

Edited by czardas

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Perhaps you (or someone) could enlighten me where this format is used.

JSON


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

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SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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#6 ·  Posted (edited)

Okay, thanks. Are the encodings actually mixed and matched like that - half ansi/half code points? I suppose they do more or less the same thing in html. The reason I was asking was to get a clearer picture.

'meru00e4u00e4' doesn't reveal enough information to assume rules of formatting, and the OP seemed to think people would already have a solution: indicating it was a recognized format. There would need to be a way to escape the backslash character - like there is in regexp.

Edited by czardas

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It's initial BOM + Unicode (UTF-8 by default) + Unicode escapes in UTF16 and 2-character escapes similar to those in C. A backslash would be u005C or . It's a real mess where "extensions" are allowed, probably to increase the odds of non-interoperability and hidden bugs. It's no wonder since JSON means JavaScript Object Notation.

They even pooped an RFC.

1 person likes this

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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#9 ·  Posted (edited)

Depending on the version pcre Jan Goyvaerts says:

 

"Perl and PCRE do not support the uFFFF syntax. They use x{FFFF} instead. You can omit leading zeros in the hexadecimal number between the curly braces."

so omitting the leading zeros what you have for:

merää

can be:

x6Dx65x72xE4xE4

but with something with two codepoints such as:

you can use the x{FFFF} format:

Local $sString = "€"
Local $aSRE = StringRegExp($sString, "\x{20AC}", 3)
For $i = 0 To UBound($aSRE) - 1
    ConsoleWrite($aSRE[$i] & @CRLF)
Next
Edited by Jury

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