From 0b8c73478268e2ae2fd8888b0bad0abe2d5a7296 Mon Sep 17 00:00:00 2001
From: Sven Augustin <sven.augustin@psi.ch>
Date: Thu, 16 Oct 2025 18:30:11 +0200
Subject: [PATCH] added converter to bsread timestamps

---
 dap/utils/__init__.py  |  1 +
 dap/utils/timestamp.py | 15 +++++++++++++++
 2 files changed, 16 insertions(+)
 create mode 100644 dap/utils/timestamp.py

diff --git a/dap/utils/__init__.py b/dap/utils/__init__.py
index 26acf15..cb78642 100644
--- a/dap/utils/__init__.py
+++ b/dap/utils/__init__.py
@@ -5,5 +5,6 @@ from .bufjson import BufferedJSON
 from .filehandler import FileHandler
 from .randskip import randskip
 from .sorter import Sorter
+from .timestamp import make_bsread_timestamp
 
 
diff --git a/dap/utils/timestamp.py b/dap/utils/timestamp.py
new file mode 100644
index 0000000..1e860fa
--- /dev/null
+++ b/dap/utils/timestamp.py
@@ -0,0 +1,15 @@
+
+NANOS_PER_S = 10**9
+NANOS_PER_MILLIS = 10**6
+
+
+def make_bsread_timestamp(ts, pid):
+    """
+    ts is assumed to be from time.time_ns() and NOT from time.time()
+    """
+    secs, nanosecs = divmod(ts, NANOS_PER_S)
+    nanosecs = (nanosecs // NANOS_PER_MILLIS) * NANOS_PER_MILLIS + (pid % NANOS_PER_MILLIS)
+    return secs, nanosecs
+
+
+