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Can't compile regex expression.


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T1MOXA
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Join Date: Aug 2016
Old 07-18-2018 , 16:34   Can't compile regex expression.
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Code:
#include <regex>
public void OnPluginStart() {
    PrintToServer("%i", CompileRegex("[\x{D800}-\x{DBFF}]", PCRE_CASELESS));
}
Return: 0

What am I doing wrong ?

UPD.
the same proplem with "[\\x{D800}-\\x{DBFF}]" expression.

Last edited by T1MOXA; 09-23-2018 at 02:41.
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Dr!fter
The Salt Boss
Join Date: Mar 2007
Old 07-18-2018 , 17:33   Re: Can't compile regex expression.
Reply With Quote #2

How about you, idk, use the error params...

PHP Code:
Regex CompileRegex(const char[] patternint flagschar[] errorint maxLenRegexErrorerrcode
Ill just add, that you should use SM 1.9 for those (since they were broken previously)

Last edited by Dr!fter; 07-18-2018 at 17:38.
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T1MOXA
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Old 07-18-2018 , 17:47   Re: Can't compile regex expression.
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Quote:
Originally Posted by Dr!fter View Post
How about you, idk, use the error params...

PHP Code:
Regex CompileRegex(const char[] patternint flagschar[] errorint maxLenRegexErrorerrcode
Ill just add, that you should use SM 1.9 for those (since they were broken previously)
Thanks...

PHP Code:
#include <regex>

public void OnPluginStart() {
    
char sError[128];
    
RegexError rError;
    
Handle hExpression CompileRegex("[\\x{D800}-\\x{DBFF}]"PCRE_UCPsErrorsizeof(sError), rError);
    
PrintToServer("Regex: %i | Error: %s | RegexError: %i"hExpressionsErrorrError);

Regex: 0 | Error: this version of PCRE is not compiled with Unicode property support | RegexError: 16

sm exts list
Regex (1.9.0.6241): Provides regex natives for plugins

With PCRE_CASELESS flag:
Regex: 0 | Error: character value in \x{...} sequence is too large | RegexError: 3

Last edited by T1MOXA; 07-18-2018 at 17:54.
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asherkin
SourceMod Developer
Join Date: Aug 2009
Location: OnGameFrame()
Old 07-18-2018 , 19:22   Re: Can't compile regex expression.
Reply With Quote #4

The root of your problem seems to be:

Quote:
Constraints on character values

Characters that are specified using octal or hexadecimal numbers are limited to certain values, as follows:

8-bit non-UTF mode less than 0x100
8-bit UTF-8 mode less than 0x10ffff and a valid codepoint
16-bit non-UTF mode less than 0x10000
16-bit UTF-16 mode less than 0x10ffff and a valid codepoint
32-bit non-UTF mode less than 0x100000000
32-bit UTF-32 mode less than 0x10ffff and a valid codepoint

Invalid Unicode codepoints are the range 0xd800 to 0xdfff (the so-called "surrogate" codepoints), and 0xffef.
https://www.pcre.org/original/doc/html/pcrepattern.html
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T1MOXA
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Old 07-18-2018 , 21:44   Re: Can't compile regex expression.
Reply With Quote #5

Thanks, but I'm not sure what it gives me...
By the way, here this expression works as it should.
From your answer I understood that most likely to do what I want using regex is not possible ?
Perhaps there is an alternative option as find emoticons in the text and remove their ?

Last edited by T1MOXA; 07-18-2018 at 21:46.
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Dr!fter
The Salt Boss
Join Date: Mar 2007
Old 07-19-2018 , 12:04   Re: Can't compile regex expression.
Reply With Quote #6

Regex re = new Regex("[\\pSo]", PCRE_UTF8, error, sizeof(error), iError);

Seems to work here is a list of what it captures.
https://www.fileformat.info/info/uni...ry/So/list.htm
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T1MOXA
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Join Date: Aug 2016
Old 07-20-2018 , 21:36   Re: Can't compile regex expression.
Reply With Quote #7

Unfortunately, this rule removes too many characters.
I am writing this regular expression to remove those characters from nicknames which do not properly send to the MySQL server.

To avoid such errors:
Incorrect string value: '\xF0\x9F\x98\x88 6...' for column 'name' at row 1

Last edited by T1MOXA; 07-20-2018 at 21:38.
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asherkin
SourceMod Developer
Join Date: Aug 2009
Location: OnGameFrame()
Old 07-20-2018 , 21:40   Re: Can't compile regex expression.
Reply With Quote #8

You should really consider switching to the utf8mb4 charset.
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T1MOXA
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Old 07-20-2018 , 23:11   Re: Can't compile regex expression.
Reply With Quote #9

Then I'll have to rewrite all plugins and web interfaces to a different encoding...
And in general it is interesting why this rule does not work in sourcemod but it works on the regex101.

Last edited by T1MOXA; 07-20-2018 at 23:12.
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asherkin
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Old 07-21-2018 , 06:38   Re: Can't compile regex expression.
Reply With Quote #10

No you won’t, the input/output is still UTF-8, it just allows characters outside of the BMP to be stored.
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