feat: 增加与 getch_console 配套的 kbhit_console (#235)

* feat: 增加与 getch_console 配套的 kbhit_console

* adjust: 增加 ege_getch() 和 ege_kbhit()

include/ege.h

@@ -1197,14 +1197,15 @@ ege_point EGEAPI ege_transform_calc(float x, float y, PIMAGE pimg = NULL);  // C
 // It is not supported in VC 6.0.
 #ifndef EGE_COMPILERINFO_VC6
 // Console
-bool init_console();    // Initialize the console
-bool clear_console();   // Clear the console
-bool show_console();    // Show the Console
-bool hide_console();    // Hide the console
-bool close_console();   // Close the console and restore the old STD I/O
+bool EGEAPI init_console();    // Initialize the console
+bool EGEAPI clear_console();   // Clear the console
+bool EGEAPI show_console();    // Show the Console
+bool EGEAPI hide_console();    // Hide the console
+bool EGEAPI close_console();   // Close the console and restore the old STD I/O
 #endif
 
-int  getch_console();   // Used instead of the getch() function in <conio.h>
+int  EGEAPI getch_console();   // Replace the getch() function in <conio.h>
+int  EGEAPI kbhit_console();   // Replace the kbhit() function in <conio.h>
 
 void EGEAPI ege_sleep (long ms);
 void EGEAPI delay     (long ms);
@@ -1519,14 +1520,17 @@ int     EGEAPI kbhitEx(int flag);
 int     EGEAPI keystate(int key);
 void    EGEAPI flushkey();
 
+int     EGEAPI ege_getch();
+int     EGEAPI ege_kbhit();
+
 #if !defined(_INC_CONIO) && !defined(_CONIO_H_)
 #define _INC_CONIO
 #define _CONIO_H_
-int EGEAPI getch();
-int EGEAPI kbhit();
+int EGEAPI getch();  // Same as ege_getch()
+int EGEAPI kbhit();  // Same as ege_kbhit()
 #else
-#define getch getchEx
-#define kbhit kbhitEx
+#define getch ege_getch
+#define kbhit ege_kbhit
 #endif
 
 int         EGEAPI mousemsg();

src/console.cpp

@@ -179,4 +179,13 @@ int getch_console()
 #endif
 }
 
+int kbhit_console()
+{
+#ifdef MSVC_VER
+    return ::_kbhit();
+#else
+    return ::kbhit();
+#endif
 }
+
+} // namespace ege

src/keyboard.cpp

@@ -160,16 +160,26 @@ int getchEx(int flag)
     return 0;
 }
 
-int kbhit()
+int ege_kbhit()
 {
     return kbhitEx(0);
 }
 
-int getch()
+int ege_getch()
 {
     return getchEx(0);
 }
 
+int kbhit()
+{
+    return ege_kbhit();
+}
+
+int getch()
+{
+    return ege_getch();
+}
+
 key_msg getkey()
 {
     struct _graph_setting* pg  = &graph_setting;