Add mingw32 and wscreen for initial MingGW32 support.

wscreen.c

@@ -0,0 +1,117 @@
+/* wscreen.c -- windows screen console */
+#include "wscreen.h"
+
+#ifdef MINGW32
+
+#include <windows.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+/* Standard error macro for reporting API errors */ 
+#define PERR(bSuccess, api){if(!(bSuccess)) printf("%s:Error %d from %s \
+    on line %d\n", __FILE__, GetLastError(), api, __LINE__);}
+
+static void cls( HANDLE hConsole )
+{
+    COORD coordScreen = { 0, 0 };    /* here's where we'll home the
+                                        cursor */ 
+    BOOL bSuccess;
+    DWORD cCharsWritten;
+    CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ 
+    DWORD dwConSize;                 /* number of character cells in
+                                        the current buffer */ 
+
+    /* get the number of character cells in the current buffer */
+
+    bSuccess = GetConsoleScreenBufferInfo( hConsole, &csbi );
+    PERR( bSuccess, "GetConsoleScreenBufferInfo" );
+    dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
+
+    /* fill the entire screen with blanks */ 
+
+    bSuccess = FillConsoleOutputCharacter( hConsole, (TCHAR) ' ',
+       dwConSize, coordScreen, &cCharsWritten );
+    PERR( bSuccess, "FillConsoleOutputCharacter" );
+
+    /* get the current text attribute */ 
+
+    bSuccess = GetConsoleScreenBufferInfo( hConsole, &csbi );
+    PERR( bSuccess, "ConsoleScreenBufferInfo" );
+
+    /* now set the buffer's attributes accordingly */ 
+
+    bSuccess = FillConsoleOutputAttribute( hConsole, csbi.wAttributes,
+       dwConSize, coordScreen, &cCharsWritten );
+    PERR( bSuccess, "FillConsoleOutputAttribute" );
+
+    /* put the cursor at (0, 0) */ 
+
+    bSuccess = SetConsoleCursorPosition( hConsole, coordScreen );
+    PERR( bSuccess, "SetConsoleCursorPosition" );
+    return;
+}
+
+void wcls( void) {
+    cls( GetStdHandle( STD_OUTPUT_HANDLE)) ;
+}
+ 
+static struct {
+	int width ;
+	int height ;
+	int curTop, curBot, curRight, curLeft ;
+} Screen ;
+
+void winit( void) {
+    CONSOLE_SCREEN_BUFFER_INFO    csbInfo ;
+
+    wcls() ;
+    if( GetConsoleScreenBufferInfo(
+                                 GetStdHandle( STD_OUTPUT_HANDLE), &csbInfo)) {
+        Screen.width = csbInfo.dwSize.X ;
+	Screen.height = csbInfo.dwSize.Y ;
+        Screen.curLeft = csbInfo.srWindow.Left ;
+	Screen.curTop = csbInfo.srWindow.Top ;
+	Screen.curRight = csbInfo.srWindow.Right ;
+	Screen.curBot = csbInfo.srWindow.Bottom ;
+    }
+}
+
+int wwidth( void) {
+	return Screen.width ;
+}
+
+int wheight( void) {
+	return Screen.height ;
+}
+
+int wleft( void) {
+	return Screen.curLeft ;
+}
+
+int wtop( void) {
+	return Screen.curTop ;
+}
+
+int wright( void) {
+	return Screen.curRight ;
+}
+
+int wbottom( void) {
+	return Screen.curBot ;
+}
+
+void wgoxy( int x, int y) {
+    COORD coord ;
+    
+    coord.X = x ;
+    coord.Y = y ;
+    SetConsoleCursorPosition( GetStdHandle( STD_OUTPUT_HANDLE), coord );
+}
+
+void wtitle( const char *title) {
+    SetConsoleTitle( title) ;
+}
+
+#endif
+
+/* end of wscreen.c */