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Change String value on a native callback?


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Starbish
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Join Date: Oct 2011
Location: South Korea
Old 01-01-2013 , 00:15   Change String value on a native callback?
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I'd like to change String value which is got from Native Parameters.

Example)

native Example(client, String:strExample[], iMaxLength);

new String:strExample[32];
Example(client, strExample, sizeof(strExample));



Like this, I want to make it if i call Example(), second params of Example() will store something not NULL_STRING.

like, GetClientName().


and i found this; FormatNativeString() but i couldn't know how to use this.

I tried to find the ways in many websites(such as Searching google, SourceMod-Wiki) but there were the ways just for VFormat in Native.
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berni
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Location: Austria
Old 01-01-2013 , 01:17   Re: Change String value on a native callback?
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Hello Starbish,

you basically have to call SetNativeString() after you set the string to write the string buffer back for the caller.

There is an example in the wiki:
http://wiki.alliedmods.net/Creating_...pting)#Strings

The function FormatNativeString is a formatter function with printf syntax, that parses %s, %d formatters from variable arguments, but to change the string buffer you basically don't need it, except you want to have variable argument formatting support.
It's described in the API Doc.
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Starbish
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Old 01-01-2013 , 01:38   Re: Change String value on a native callback?
Reply With Quote #3

Quote:
Originally Posted by berni View Post
Hello Starbish,

you basically have to call SetNativeString() after you set the string to write the string buffer back for the caller.

There is an example in the wiki:
http://wiki.alliedmods.net/Creating_...pting)#Strings

The function FormatNativeString is a formatter function with printf syntax, that parses %s, %d formatters from variable arguments, but to change the string buffer you basically don't need it, except you want to have variable argument formatting support.
It's described in the API Doc.
Thank you Berni!

You answered exactly what i wanted !

I really appreciated with your answer and understanding my Bad English = )

REALLY THANK YOU!!!!
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Powerlord
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Old 01-02-2013 , 14:27   Re: Change String value on a native callback?
Reply With Quote #4

The native has to expect that the string can be modified (i.e. Call_PushStringEx is declared with SM_PARAM_COPYBACK in its fourth argument).
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berni
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Old 01-02-2013 , 23:25   Re: Change String value on a native callback?
Reply With Quote #5

Arrays can always be overwritten I think.
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Powerlord
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Old 01-03-2013 , 09:35   Re: Change String value on a native callback?
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Quote:
Originally Posted by berni View Post
Arrays can always be overwritten I think.
The documentation for the third argument to Call_PushArrayEx ("Whether or not changes should be copied back to the input array") implies that's wrong, but I haven't checked the C++ side to make sure.

The same argument is the fourth argument to Call_PushStringEx.
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Last edited by Powerlord; 01-03-2013 at 09:40.
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asherkin
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Old 01-03-2013 , 09:41   Re: Change String value on a native callback?
Reply With Quote #7

Quote:
Originally Posted by Powerlord View Post
implies that's wrong
It is.
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kazya3
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Join Date: Aug 2019
Location: CN
Old 04-10-2024 , 02:56   Re: Change String value on a native callback?
Reply With Quote #8

Quote:
Originally Posted by berni View Post
Hello Starbish,
you basically have to call SetNativeString() after you set the string to write the string buffer back for the caller.
I was suffering from the problems for some hours. You are my hero!
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