Core: ReadSecret (thanks Oblivion)

git-svn-id: svn://ultimatepp.org/upp/trunk@11238 f0d560ea-af0d-0410-9eb7-867de7ffcac7

uppsrc/Core/Stream.cpp

@@ -2,6 +2,7 @@
 
 #ifdef PLATFORM_POSIX
 #include <sys/mman.h>
+#include <termios.h>
 #endif
 
 namespace Upp {
@@ -1304,6 +1305,38 @@ String ReadStdIn()
 	}
 }
 
+String ReadSecret()
+{
+	DisableEcho();
+	String s = ReadStdIn();
+	EnableEcho();
+	return s;
+}
+
+void EnableEcho(bool b)
+{
+#ifdef PLATFORM_POSIX
+	termios t;
+	tcgetattr(STDIN_FILENO, &t);
+	if(b) t.c_lflag |=  ECHO;
+	else  t.c_lflag &= ~ECHO;
+	tcsetattr(STDIN_FILENO, TCSANOW, &t);
+#elif PLATFORM_WIN32
+    	HANDLE h = GetStdHandle(STD_INPUT_HANDLE); 
+    	DWORD mode = 0;
+    	GetConsoleMode(h, &mode);
+    	if(b) mode |=  ENABLE_ECHO_INPUT;
+    	else  mode &= ~ENABLE_ECHO_INPUT;
+    	SetConsoleMode(h, mode);
+#endif	
+}
+
+void DisableEcho()
+{
+	EnableEcho(false);
+}
+
+
 // ---------------------------------------------------------------------------
 
 String LoadStream(Stream& in) {

uppsrc/Core/Stream.h

@@ -622,6 +622,9 @@ void    CoutUTF8();
 Stream& Cout();
 Stream& Cerr();
 String  ReadStdIn();
+String  ReadSecret();
+void    EnableEcho(bool b = true);
+void    DisableEcho();
 #endif
 
 Stream& NilStream();

uppsrc/Core/src.tpp/StreamFn$en-us.tpp

@@ -62,6 +62,13 @@ Data written to this stream are displayed as characters in console.&]
 [s7;%% [*/ Return value]-|Console input.&]
 [s3; &]
 [s4; &]
+[s5;:Upp`:`:ReadSecret`(`): [_^Upp`:`:String^ String]_[* ReadSecret]()&]
+[s2;%% Reads one line of input data from the console without echoing. 
+This function is useful for reading passwords, secret phrases, 
+etc. from the console.&]
+[s7;%% [*/ Return value]-|Console input.&]
+[s3; &]
+[s4; &]
 [s5;:NilStream`(`): [_^Stream^ Stream][@(0.0.255) `&]_[* NilStream]()&]
 [s2;%% Returns special stream that is always in IsEof state and simply 
 discards all data written to it.&]