GraphMeterMode_draw() code cleanup

* Rework the logic of computing `i` (initial index of graph data
records) slightly and remove unreachable code.
* Rename k to `col` and change its data type from ssize_t back to int.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>

1 files changed, 3 insertions, 9 deletions

diff --git a/Meter.c b/Meter.c
index e98cc519..460b2925 100644
--- a/Meter.c
+++ b/Meter.c
@@ -333,14 +333,8 @@ static void GraphMeterMode_draw(Meter* this, int x, int y, int w) {
       GraphMeterMode_pixPerRow = PIXPERROW_ASCII;
    }
 
-   assert(nValues <= SSIZE_MAX);
-   ssize_t i = (ssize_t)nValues - (w * 2);
-   ssize_t k = 0;
-   if (i < 0) {
-      k = -i / 2;
-      i = 0;
-   }
-   for (; i < (ssize_t)nValues - 1; i += 2, k++) {
+   size_t i = nValues - (size_t)w * 2;
+   for (int col = 0; i < nValues - 1; i += 2, col++) {
       int pix = GraphMeterMode_pixPerRow * GRAPH_HEIGHT;
       if (this->total < 1)
          this->total = 1;
@@ -353,7 +347,7 @@ static void GraphMeterMode_draw(Meter* this, int x, int y, int w) {
          int line2 = CLAMP(v2 - (GraphMeterMode_pixPerRow * (GRAPH_HEIGHT - 1 - line)), 0, GraphMeterMode_pixPerRow);
 
          attrset(CRT_colors[colorIdx]);
-         mvaddstr(y + line, x + k, GraphMeterMode_dots[line1 * (GraphMeterMode_pixPerRow + 1) + line2]);
+         mvaddstr(y + line, x + col, GraphMeterMode_dots[line1 * (GraphMeterMode_pixPerRow + 1) + line2]);
          colorIdx = GRAPH_2;
       }
    }