From 723e34275aa0f79db15deac29ac52892b93a9d6d Mon Sep 17 00:00:00 2001
From: cnlohr <lohr85@gmail.com>
Date: Wed, 21 Jun 2023 06:40:01 -0400
Subject: [PATCH] Add missing header.
---
minichlink/terminalhelp.h | 159 ++++++++++++++++++++++++++++++++++++++
1 file changed, 159 insertions(+)
create mode 100644 minichlink/terminalhelp.h
diff --git a/minichlink/terminalhelp.h b/minichlink/terminalhelp.h
new file mode 100644
index 0000000..38cbcf1
--- /dev/null
+++ b/minichlink/terminalhelp.h
@@ -0,0 +1,159 @@
+// terminalhelp from mini-rv32ima.
+#ifndef _TERMINALHELP_H
+#define _TERMINALHELP_H
+
+#include <stdint.h>
+
+// Provides the following:
+static void CaptureKeyboardInput() __attribute__((used));
+static void ResetKeyboardInput() __attribute__((used));
+static uint64_t GetTimeMicroseconds() __attribute__((used));
+static int ReadKBByte() __attribute__((used));
+static int IsKBHit() __attribute__((used));
+
+#if defined(WINDOWS) || defined(WIN32) || defined(_WIN32)
+
+#include <windows.h>
+#include <conio.h>
+
+#define strtoll _strtoi64
+
+static void CaptureKeyboardInput()
+{
+ system(""); // Poorly documented tick: Enable VT100 Windows mode.
+}
+
+static void ResetKeyboardInput()
+{
+}
+
+static uint64_t GetTimeMicroseconds()
+{
+ static LARGE_INTEGER lpf;
+ LARGE_INTEGER li;
+
+ if( !lpf.QuadPart )
+ QueryPerformanceFrequency( &lpf );
+
+ QueryPerformanceCounter( &li );
+ return ((uint64_t)li.QuadPart * 1000000LL) / (uint64_t)lpf.QuadPart;
+}
+
+
+static int IsKBHit()
+{
+ return _kbhit();
+}
+
+static int ReadKBByte()
+{
+ // This code is kind of tricky, but used to convert windows arrow keys
+ // to VT100 arrow keys.
+ static int is_escape_sequence = 0;
+ int r;
+ if( is_escape_sequence == 1 )
+ {
+ is_escape_sequence++;
+ return '[';
+ }
+
+ r = _getch();
+
+ if( is_escape_sequence )
+ {
+ is_escape_sequence = 0;
+ switch( r )
+ {
+ case 'H': return 'A'; // Up
+ case 'P': return 'B'; // Down
+ case 'K': return 'D'; // Left
+ case 'M': return 'C'; // Right
+ case 'G': return 'H'; // Home
+ case 'O': return 'F'; // End
+ default: return r; // Unknown code.
+ }
+ }
+ else
+ {
+ switch( r )
+ {
+ case 13: return 10; //cr->lf
+ case 224: is_escape_sequence = 1; return 27; // Escape arrow keys
+ default: return r;
+ }
+ }
+}
+
+#else
+
+#include <sys/ioctl.h>
+#include <termios.h>
+#undef BS0
+#undef BS1
+#include <unistd.h>
+#include <signal.h>
+#include <sys/time.h>
+
+static void CtrlC()
+{
+ exit( 0 );
+}
+
+// Override keyboard, so we can capture all keyboard input for the VM.
+static void CaptureKeyboardInput()
+{
+ // Hook exit, because we want to re-enable keyboard.
+ atexit(ResetKeyboardInput);
+ signal(SIGINT, CtrlC);
+
+ struct termios term;
+ tcgetattr(0, &term);
+ term.c_lflag &= ~(ICANON | ECHO); // Disable echo as well
+ tcsetattr(0, TCSANOW, &term);
+}
+
+static void ResetKeyboardInput()
+{
+ // Re-enable echo, etc. on keyboard.
+ struct termios term;
+ tcgetattr(0, &term);
+ term.c_lflag |= ICANON | ECHO;
+ tcsetattr(0, TCSANOW, &term);
+}
+
+static uint64_t GetTimeMicroseconds()
+{
+ struct timeval tv;
+ gettimeofday( &tv, 0 );
+ return tv.tv_usec + ((uint64_t)(tv.tv_sec)) * 1000000LL;
+}
+
+static int is_eofd;
+
+static int ReadKBByte()
+{
+ if( is_eofd ) return 0xffffffff;
+ char rxchar = 0;
+ int rread = read(fileno(stdin), (char*)&rxchar, 1);
+
+ if( rread > 0 ) // Tricky: getchar can't be used with arrow keys.
+ return rxchar;
+ else
+ return -1;
+}
+
+static int IsKBHit()
+{
+ if( is_eofd ) return -1;
+ int byteswaiting;
+ ioctl(0, FIONREAD, &byteswaiting);
+ if( !byteswaiting && write( fileno(stdin), 0, 0 ) != 0 ) { is_eofd = 1; return -1; } // Is end-of-file for
+ return !!byteswaiting;
+}
+
+
+#endif
+
+
+#endif
+
--
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