Interface: window placement redone

src/plot.c

@@ -0,0 +1,44 @@
+#include <math.h>
+
+#include "nvtop/plot.h"
+
+static inline int data_level(double data, double increment) {
+  return (int)(nearbyint(data / increment));
+}
+
+void nvtop_line_plot(WINDOW *win, size_t num_data, const double *data,
+                     double min, double max) {
+  if (num_data == 0)
+    return;
+  int rows, cols;
+  getmaxyx(win, rows, cols);
+  double increment = (max - min) / (double)rows;
+  int level_previous = data_level(data[0], increment);
+  int level_next, level_current;
+  for (size_t i = 0; i < num_data || i < (size_t) cols; ++i) {
+    level_next = i + 1 == num_data ? level_next : data_level(data[i+1], increment);
+    level_current = data_level(data[i], increment);
+    int top, bottom;
+    if (level_current == level_previous) {
+      mvwaddch(win, level_current, i, ACS_HLINE);
+    } else {
+      if (level_current < level_previous) {
+        top = level_previous;
+        bottom = level_current;
+      } else {
+        top = level_current;
+        bottom = level_previous;
+      }
+      mvwaddch(win, top, i, ACS_ULCORNER);
+      for (int j = bottom + 1; j < top - 1; j++) {
+        mvwaddch(win, j, i, ACS_VLINE);
+      }
+      mvwaddch(win, bottom, i, ACS_LRCORNER);
+    }
+  }
+}
+
+void nvtop_bar_plot(WINDOW *win, size_t num_data, const double *data,
+                     double min, double max) {
+  /*ACS_BLOCK*/
+}