utf8_egc_len: work around treacherous wcwidth #903

src/demo/mojibake.c

@@ -3528,8 +3528,8 @@ makegroup(struct ncplane* title, int y, const char* emoji, const char* name){
     if(bytes < 0){
       break;
     }
-fprintf(stderr, "PLACING %d/%d: %zu [%s]\n", y, x, strlen(cell_extended_gcluster(n, &c)), cell_extended_gcluster(n, &c));
     int w = ncplane_putc_yx(n, y, x, &c);
+//fprintf(stderr, "PLACED %d/%d (%d): %zu [%s]\n", y, x, w, strlen(cell_extended_gcluster(n, &c)), cell_extended_gcluster(n, &c));
     cell_release(n, &c);
     if(w < 0){
       ncplane_destroy(n);

src/lib/egcpool.h

@@ -88,7 +88,8 @@ utf8_egc_len(const char* gcluster, int* colcount){
           if(iswspace(wc)){ // newline or tab
             return ret + 1;
           }
-          cols = 0;
+          ret += r;
+          break;
         }
         *colcount += cols;
       }