ncurses – 本机调用接口:如何翻译“wchar_t”?
发布时间:2020-12-15 23:36:09 所属栏目:大数据 来源:网络整理
导读:我想使用ncurses int addwstr(const wchar_t * wstr);功能在Perl6中. 我怎么能得到一个Perl 6签名来传达addwstr的const wchar_t * wstr? use v6;use NativeCall;constant LIB = 'libncursesw.so.5';sub addwstr( ? ) returns int32 is native(LIB) is expor
我想使用ncurses int addwstr(const wchar_t * wstr);功能在Perl6中.
我怎么能得到一个Perl 6签名来传达addwstr的const wchar_t * wstr? use v6; use NativeCall; constant LIB = 'libncursesw.so.5'; sub addwstr( ? ) returns int32 is native(LIB) is export {*}; 解决方法
wchar_t在我的机器上是32位.从
NativeCall doco开始,您可以声明它们的数组,数组名称将作为指针;
#!/usr/bin/env perl6 use v6; use NCurses; # To get iniscr(),endwin() etc use NativeCall; # Need to run setlocale from the C library my int32 constant LC_ALL = 6; # From locale.h my sub setlocale(int32,Str) returns Str is native(Str) { * } constant LIB = 'libncursesw.so.5'; sub addwstr(CArray[int32]) returns int32 is native(LIB) { * } # The smiley : Codepoint 0x263a # Latin space : Codepoint 0x20 (Ascii decimal ord 32) # Check mark (tick) : Codepoint 0x2713 my CArray[int32] $wchar_str .= new(0x263a,0x20,0x2713); setlocale(LC_ALL,""); initscr(); move(2,2); addwstr( $wchar_str ); nc_refresh; while getch() < 0 {}; endwin; 这会在我的机器上打印“??”.如果没有调用setlocale,它就无法工作. 顺便说一下,你不必使用’w’函数 – 你可以只传递普通的perl6字符串(大概是编码的UTF-8),它只是起作用.这产生了相同的结果; #!/usr/bin/env perl6 use v6; use NCurses; use NativeCall; # Need to run setlocale from the standard C library my int32 constant LC_ALL = 6; # From locale.h my sub setlocale(int32,Str) returns Str is native(Str) { * } my $ordinary_scalar = "? ?"; setlocale(LC_ALL,2); addstr( $ordinary_scalar ); # No 'w' necessary nc_refresh; while getch() < 0 {}; endwin; (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |