# st

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    commit a7d7e29300acade90f2025f0b85fa5eae06edb24
    parent 375b6e5b175ce0a01d47288e94e9c4a8acc3939a
    Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
    Date:   Wed, 26 Sep 2012 20:53:46 +0200

    Ignore all control characters not handled

    Taken from vt100 programmer manual:

    	Control characters have values of \000 - \037, and \177. The control
    	characters recognized by the VT100 are shown in Table 3-10. All
    	other control codes cause no action to be taken.

    We have to take attention when we are using alternate charset, because in
    this cases they are not used as control characters.
    ---
     st.c |   20 ++++++++++----------
     1 file changed, 10 insertions(+), 10 deletions(-)
    Diffstat:
    Mst.c | 20++++++++++----------

    1 file changed, 10 insertions(+), 10 deletions(-)
    diff --git a/st.c b/st.c
    @@ -1663,7 +1663,7 @@ tputtab(bool forward) {

     void
     tputc(char *c, int len) {
    -	char ascii = *c;
    +	uchar ascii = *c;

     	if(iofd != -1)
     		write(iofd, c, len);
    @@ -1792,8 +1792,6 @@ tputc(char *c, int len) {
     		if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
     			sel.bx = -1;
     		switch(ascii) {
    -		case '\0': /* padding character, do nothing */
    -			break;
     		case '\t':
     			tputtab(1);
     			break;
    @@ -1818,13 +1816,15 @@ tputc(char *c, int len) {
     			term.esc = ESC_START;
     			break;
     		default:
    -			if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
    -				tnewline(1); /* always go to first col */
    -			tsetchar(c);
    -			if(term.c.x+1 < term.col)
    -				tmoveto(term.c.x+1, term.c.y);
    -			else
    -				term.c.state |= CURSOR_WRAPNEXT;
    +			if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
    +				if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
    +					tnewline(1); /* always go to first col */
    +				tsetchar(c);
    +				if(term.c.x+1 < term.col)
    +					tmoveto(term.c.x+1, term.c.y);
    +				else
    +					term.c.state |= CURSOR_WRAPNEXT;
    +			}
     		}
     	}
     }