commit 506b8ea0c675e6154aa2b9bdb6e6623a3be09c8c
from: Roberto E. Vargas Caballero <k0ga@shike2.com>
date: Sat Oct  6 17:13:36 2012 UTC

Add SI and SO control codes
SI and SO allows change the G0 and G1 selection. This implementation is not
full vt100 compatible, but it is complatible with linux virtual terminal
implementation. For full vt100 compatibility we need remake a lot of stuff
relate to the different charmaps.
---
 st.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

commit - 3fce3392ac04283ff1bf00647af943ce47d9bc94
commit + 506b8ea0c675e6154aa2b9bdb6e6623a3be09c8c
blob - 8e25d2334ec9a73703f2c6df117e046e998cbda6
blob + ba6973a9aa06c4a047ed6bd6873a498ff024ece9
--- st.c
+++ st.c
@@ -1814,9 +1814,12 @@ tputc(char *c, int len) {
 		csireset();
 		term.esc = ESC_START;
 		return;
-	case '\016':	/* XXX: SO */
-	case '\017':	/* XXX: SI */
+	case '\016':	/* SO */
+		term.c.attr.mode |= ATTR_GFX;
 		break;
+	case '\017':	/* SI */
+		term.c.attr.mode &= ~ATTR_GFX;
+		return;
 	case '\032':	/* SUB */
 	case '\030':	/* CAN */
 		csireset();