st

suckless terminal - with my changes
git clone https://pi.duncano.de/git/st.git
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commit 844c503c800e5e1db1e409f5db729431ee2e5c00
parent 1b0b9759dca9739da04f5c8a206b2f8ee5ed8b25
Author: noname <noname@inventati.org>
Date:   Wed, 23 Apr 2014 23:12:45 +0400

Optimize tputtab.

Before this patch executing
	printf '\e[10000000000I'
or
	printf '\e[10000000000Z'
resulted in long delay.

Diffstat:
st.c | 28++++++++++++----------------
1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/st.c b/st.c @@ -375,7 +375,7 @@ static void tmoveto(int, int); static void tmoveato(int, int); static void tnew(int, int); static void tnewline(int); -static void tputtab(bool); +static void tputtab(int); static void tputc(char *, int); static void treset(void); static int tresize(int, int); @@ -1996,8 +1996,7 @@ csihandle(void) { break; case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */ DEFAULT(csiescseq.arg[0], 1); - while(csiescseq.arg[0]--) - tputtab(1); + tputtab(csiescseq.arg[0]); break; case 'J': /* ED -- Clear screen */ selclear(NULL); @@ -2065,8 +2064,7 @@ csihandle(void) { break; case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */ DEFAULT(csiescseq.arg[0], 1); - while(csiescseq.arg[0]--) - tputtab(0); + tputtab(-csiescseq.arg[0]); break; case 'd': /* VPA -- Move to <row> */ DEFAULT(csiescseq.arg[0], 1); @@ -2281,19 +2279,17 @@ tdump(void) { } void -tputtab(bool forward) { +tputtab(int n) { uint x = term.c.x; - if(forward) { - if(x == term.col) - return; - for(++x; x < term.col && !term.tabs[x]; ++x) - /* nothing */ ; - } else { - if(x == 0) - return; - for(--x; x > 0 && !term.tabs[x]; --x) - /* nothing */ ; + if(n > 0) { + while(x < term.col && n--) + for(++x; x < term.col && !term.tabs[x]; ++x) + /* nothing */ ; + } else if(n < 0) { + while(x > 0 && n++) + for(--x; x > 0 && !term.tabs[x]; --x) + /* nothing */ ; } tmoveto(x, term.c.y); }