From d10b943524f18a5dcf8f9b8c701cbc0c6889bf62 Mon Sep 17 00:00:00 2001
From: robijn <robijn@users.sourceforge.net>
Date: Mon, 14 Jan 2002 22:09:10 +0000
Subject: [PATCH] Bignum support.

---
 server/drivers/hd44780.c | 188 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 188 insertions(+)

diff --git a/server/drivers/hd44780.c b/server/drivers/hd44780.c
index 09dbe91..893c080 100644
--- a/server/drivers/hd44780.c
+++ b/server/drivers/hd44780.c
@@ -761,6 +761,98 @@ HD44780_hbar (Driver *drvthis, int x, int y, int len)
 MODULE_EXPORT void
 HD44780_init_num (Driver *drvthis)
 {
+	PrivateData *p = (PrivateData *) drvthis->private_data;
+	int i;
+
+	char bignum_udcs[8][5*8] = {{
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0
+	}, {
+		0, 0, 0, 1, 1,
+		0, 0, 0, 1, 1,
+		0, 0, 0, 1, 1,
+		0, 0, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		0, 0, 0, 0, 0
+	}, {
+		1, 1, 0, 1, 1,
+		1, 1, 0, 1, 1,
+		1, 1, 0, 1, 1,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0
+	}, {
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		0, 0, 0, 0, 0
+	}, {
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 1, 1,
+		0, 0, 0, 1, 1,
+		0, 0, 0, 1, 1,
+		0, 0, 0, 0, 0
+	}, {
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		1, 1, 0, 1, 1,
+		1, 1, 0, 1, 1,
+		1, 1, 0, 1, 1,
+		0, 0, 0, 0, 0
+	}, {
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		1, 1, 0, 0, 0,
+		0, 0, 0, 0, 0
+	}, {
+		0, 0, 0, 1, 1,
+		0, 0, 0, 1, 1,
+		0, 0, 0, 1, 1,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0
+	}};
+	
+	if( p->udcmode == UDCMODE_BIGNUM ) {
+		/* Work already done */
+		return;
+	}
+	
+	if( p->udcmode != UDCMODE_STANDARD ) {
+		/* Not supported (yet) */
+		report( RPT_WARNING, "HD44780_init_num: Cannot combine two modes using user defined characters" );
+		return;
+	}
+	p->udcmode = UDCMODE_BIGNUM;
+
+	for( i=0; i<8; i++ ) {
+		HD44780_set_char (drvthis, i, bignum_udcs[i]);
+	}
 }
 
 /////////////////////////////////////////////////////////////////
@@ -769,6 +861,102 @@ HD44780_init_num (Driver *drvthis)
 MODULE_EXPORT void
 HD44780_num (Driver *drvthis, int x, int num)
 {
+	PrivateData *p = (PrivateData *) drvthis->private_data;
+
+	char bignum_map[11][4][3] = {
+	{ /* 0: */
+		{1,2,3},
+		{6,32,6},
+		{6,32,6},
+		{7,2,32}
+	},
+	{ /* 1: */
+		{7,6,32},
+		{32,6,32},
+		{32,6,32},
+		{7,2,32},
+	},
+	{ /* 2: */
+		{1,2,3},
+		{32,5,0},
+		{1,32,32},
+		{2,2,0},
+	},
+	{ /* 3: */
+		{1,2,3},
+		{32,5,0},
+		{3,32,6},
+		{7,2,32}
+	},
+	{ /* 4: */
+		{32,3,6},
+		{1,32,6},
+		{2,2,6},
+		{32,32,0}
+	},
+	{ /* 5: */
+		{1,2,0},
+		{2,2,3},
+		{3,32,6},
+		{7,2,32}
+	},
+	{ /* 6: */
+		{1,2,32},
+		{6,5,32},
+		{6,32,6},
+		{7,2,32}
+	},
+	{ /* 7: */
+		{2,2,6},
+		{32,1,32},
+		{32,6,32},
+		{32,0,32}
+	},
+	{ /* 8: */
+		{1,2,3},
+		{4,5,0},
+		{6,32,6},
+		{7,2,32}
+	},
+	{ /* 9: */
+		{1,2,3},
+		{4,3,6},
+		{32,1,32},
+		{7,32,32}
+	},
+	{ /* colon: */
+		{32},
+		{7},
+		{7},
+		{32}
+	}};
+
+	if( num < 0 || num > 10 ) return;
+
+	HD44780_init_num(drvthis);
+
+	if( p->width >= 20 && p->height >= 4 ) {
+
+		int y = ( p->height - 2 ) / 2;
+		int x2, y2;
+
+		for( x2 = 0; x2 <= 2; x2 ++ ) {
+			for( y2 = 0; y2 <= 3; y2 ++ ) {
+				HD44780_chr( drvthis, x+x2, y+y2, bignum_map[num][y2][x2] );
+			}
+			if( num == 10 ) {
+				x2 = 2; /* =break, for colon only */
+			}
+		}
+	}
+	else {
+		int y = ( p->height - 1 ) / 2;
+		if( num == 11 ) {
+			HD44780_chr( drvthis, x, y, ':' );
+		} else {
+			HD44780_chr( drvthis, x, y, num + '0' );
+		}
+	}
 }
 
 /////////////////////////////////////////////////////////////