From 036251d1fa388fc7b381643e06e65c988ba33def Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Tue, 5 Mar 2024 21:56:35 +0100
Subject: make more readable converting Ns to string

---
 src/timer-ns.cpp | 66 ++++++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 50 insertions(+), 16 deletions(-)

diff --git a/src/timer-ns.cpp b/src/timer-ns.cpp
index b467ce19..1f927f14 100644
--- a/src/timer-ns.cpp
+++ b/src/timer-ns.cpp
@@ -8,27 +8,61 @@ namespace floormat {
 
 
 
-Debug& operator<<(Debug& dbg, const Ns& box)
+Debug& operator<<(Debug& dbg, const Ns& val)
 {
-    const auto value = (float)((double)box.stamp * 1e-6);
-    const auto absval = Math::abs(value);
+    const char* unit;
+    double x = val.stamp;
     int precision;
-    if (absval < 2)
-        precision = 4;
-    else if (absval < 5)
-        precision = 2;
-    else if (absval < 100)
+    if (val >= 10*Second)
+    {
+        unit = "s";
+        x *= 1e-9;
         precision = 1;
+    }
+#if 0
+    else if (val >= 1*Second)
+    {
+        unit = "ms";
+        x *= 1e-6;
+        precision = 3;
+
+    }
+#endif
+    else if (val >= 100*Millisecond)
+    {
+        unit = "ms";
+        x *= 1e-6;
+        precision = 3;
+    }
+    else if (val >= 50*Microsecond)
+    {
+        unit = "ms";
+        x *= 1e-6;
+        precision = 4;
+    }
+    else if (val >= 1*Microsecond)
+    {
+        unit = "usec";
+        x *= 1e-3;
+        precision = 3;
+    }
+    else if (val.stamp > 1000)
+    {
+        char buf[64];
+        std::snprintf(buf, sizeof buf, "%llu_%llu ns",
+                      val.stamp / 1000, val.stamp % 1000);
+        return dbg;
+    }
     else
+    {
+        unit = "ns";
         precision = 0;
-    auto flags = dbg.flags();
-    dbg << "";
-    dbg.setFlags(flags | Debug::Flag::NoSpace);
-    //dbg << "{";
-    dbg << fraction(value, precision);
-    dbg << " ms";
-    //dbg << "}";
-    dbg.setFlags(flags);
+    }
+    if (!precision)
+        dbg << (uint64_t)x << Debug::space << unit;
+    else
+        dbg << fraction((float)x, precision) << Debug::space << unit;
+
     return dbg;
 }
 
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