Re: [libmicrohttpd] Run-Time Check Failure(Static Link in Debug)

[Evgeny Grin]

Hi,

Did you build it from the official tarbal archive?

Have you compiled the example without any source code modification?

What is your compiler, librarian and linker settings?
Share your "Command line" for the library and the application if you 
added a VS project.

Can you share the content of 'base64' and 'base64_len' parameters, when 
MHD_base64_to_bin_n() is called and then aborted with run-time check?

Probably VS compiler requires an extra casting, while in practice the 
code has enough castings already.

--
Evgeny

On 11.09.2023 12:14, luozhaotian wrote:
> When test https://www.gnu.org/software/libmicrohttpd/tutorial.html 
> <https://www.gnu.org/software/libmicrohttpd/tutorial.html> chapter 5 
> Supporting basic 
> authentication(libmicrohttpd-0.9.77/doc/examples/basicauthentication.cpp), i encounter this error:
> Run-Time Check Failure #1 - A cast to a smaller data type has caused a 
> loss of data.  If this was intentional, you should mask the source of 
> the cast with the appropriate bitmask.
>
> The call stack:
>  >Hello.exe!MHD_base64_to_bin_n(const char * base64, unsigned __int64 
> base64_len, void * bin, unsigned __int64 bin_size) line 1422
> Hello.exe!MHD_basic_auth_get_username_password(MHD_Connection * 
> connection, char * * password) line 95
> Hello.exe!answer_to_connection(void * cls, MHD_Connection * connection, 
> const char * url, const char * method, const char * version, const char 
> * upload_data, unsigned __int64 * upload_data_size, void * * con_cls) 
> line 46
> Hello.exe!call_connection_handler(MHD_Connection * connection) line 3070
>          ......
>         MHD_basic_auth_get_username_password
>
> I use Visual Studio 2022
> Microsoft Visual Studio Community 2022 (64 位) - Current Version 17.5.3
>
> I use Debug_x64 , and static link  to 
> 0.9.77\x86_64\VS2022\Debug-static\libmicrohttpd_d.lib
> But use dll is ok.

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