Improve speed of drw_text when provided with large strings - dwm - dynamic window manager
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       ---
 (DIR) commit 716233534b35f74dba5a46ade8f1a6f8cc72fea4
 (DIR) parent 138b405f0c8aa24d8a040cc1a1cf6e3eb5a0ebc7
 (HTM) Author: Miles Alan <m@milesalan.com>
       Date:   Mon,  9 Aug 2021 18:24:14 +0200
       
       Improve speed of drw_text when provided with large strings
       
       Calculates len & ew in drw_font_getexts loop by incrementing instead of
       decrementing; as such avoids proportional increase in time spent in loop
       based on provided strings size.
       
       Diffstat:
         M drw.c                               |       7 +++++--
       
       1 file changed, 5 insertions(+), 2 deletions(-)
       ---
 (DIR) diff --git a/drw.c b/drw.c
       @@ -310,8 +310,11 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
                        if (utf8strlen) {
                                drw_font_getexts(usedfont, utf8str, utf8strlen, &ew, NULL);
                                /* shorten text if necessary */
       -                        for (len = MIN(utf8strlen, sizeof(buf) - 1); len && ew > w; len--)
       -                                drw_font_getexts(usedfont, utf8str, len, &ew, NULL);
       +                        if (ew > w)
       +                                for (ew = 0, len = 0; ew < w - lpad * 2 && len < MIN(utf8strlen, sizeof(buf) - 1); len++)
       +                                        drw_font_getexts(usedfont, utf8str, len, &ew, NULL);
       +                        else
       +                                len = MIN(utf8strlen, sizeof(buf) - 1);
        
                                if (len) {
                                        memcpy(buf, utf8str, len);