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win32: unicode command line, fix showfile

--- a/kern/win32.c

+++ b/kern/win32.c

@@ -244,31 +244,6 @@

 }

 int

-win_hasunicode(void)

-{

-	OSVERSIONINFOA osinfo;

-	int r;

-

-	osinfo.dwOSVersionInfoSize = sizeof(osinfo);

-	if(!GetVersionExA(&osinfo))

-		panic("GetVersionEx failed");

-	switch(osinfo.dwPlatformId) {

-	default:

-		panic("unknown PlatformId");

-	case VER_PLATFORM_WIN32s:

-		panic("Win32s not supported");

-	case VER_PLATFORM_WIN32_WINDOWS:

-		r = 0;

-		break;

-	case VER_PLATFORM_WIN32_NT:

-		r = 1;

-		break;

-	}

-

-	return r;

-}

-

-int

 wstrlen(Rune *s)

 {

 	int n;

@@ -284,15 +259,12 @@

 {

 	int argc, n;

 	char *arg, *p, **argv;

-	Rune *warg;

+	wchar_t *warg;

-	if(0 && win_hasunicode()){

-		warg = GetCommandLineW();

-		n = (wstrlen(warg)+1)*UTFmax;

-		arg = malloc(n);

-		wstrtoutf(arg, warg, n);

-	}else

-		arg = GetCommandLineA();

+	warg = GetCommandLineW();

+	n = wcslen(warg)*UTFmax+1;

+	arg = malloc(n);

+	WideCharToMultiByte(CP_UTF8,0,warg,-1,arg,n,0,0);

 	/* conservative guess at the number of args */

 	for(argc=4,p=arg; *p; p++)

@@ -448,23 +420,26 @@

 long

 showfilewrite(char *a, int n)

 {

-	Rune *action, *arg, *cmd, *p;

-	static Rune Lopen[] = { 'o', 'p', 'e', 'n', 0 };

+	wchar_t *action, *arg, *cmd, *p;

+	int m;

-	cmd = runesmprint("%.*s", n, a);

+	cmd = malloc((n+1)*sizeof(wchar_t));

 	if(cmd == nil)

 		error("out of memory");

-	if(cmd[runestrlen(cmd)-1] == '\n')

-		cmd[runestrlen(cmd)] = 0;

-	p = runestrchr(cmd, ' ');

+	m = MultiByteToWideChar(CP_UTF8,0,a,n,cmd,n);

+	while(m > 0 && cmd[m-1] == '\n')

+		m--;

+	cmd[m] = 0;

+	p = wcschr(cmd, ' ');

 	if(p){

 		action = cmd;

 		*p++ = 0;

 		arg = p;

 	}else{

-		action = Lopen;

+		action = L"open";

 		arg = cmd;

 	}

-	ShellExecute(0, 0, action, arg, 0, SW_SHOWNORMAL);

+	ShellExecuteW(0, action, arg, 0, 0, SW_SHOWNORMAL);

+	free(cmd);

 	return n;

 }