From df80274644490189d150fa94f4c300c7b8735ddb Mon Sep 17 00:00:00 2001
From: Miroslav Lichvar <mlichvar@redhat.com>
Date: Tue, 19 Jul 2022 14:33:40 +0200
Subject: [PATCH] quantiles: add function to get minimum k

---
 quantiles.c           | 8 ++++++++
 quantiles.h           | 1 +
 test/unit/quantiles.c | 2 ++
 3 files changed, 11 insertions(+)

diff --git a/quantiles.c b/quantiles.c
index 8b72a61..52953db 100644
--- a/quantiles.c
+++ b/quantiles.c
@@ -185,6 +185,14 @@ QNT_Accumulate(QNT_Instance inst, double value)
 
 /* ================================================== */
 
+int
+QNT_GetMinK(QNT_Instance inst)
+{
+  return inst->min_k;
+}
+
+/* ================================================== */
+
 double
 QNT_GetQuantile(QNT_Instance inst, int k)
 {
diff --git a/quantiles.h b/quantiles.h
index 590105e..1788544 100644
--- a/quantiles.h
+++ b/quantiles.h
@@ -35,6 +35,7 @@ extern void QNT_DestroyInstance(QNT_Instance inst);
 
 extern void QNT_Reset(QNT_Instance inst);
 extern void QNT_Accumulate(QNT_Instance inst, double value);
+extern int QNT_GetMinK(QNT_Instance inst);
 extern double QNT_GetQuantile(QNT_Instance inst, int k);
 
 #endif
diff --git a/test/unit/quantiles.c b/test/unit/quantiles.c
index fc6364b..5d97df6 100644
--- a/test/unit/quantiles.c
+++ b/test/unit/quantiles.c
@@ -42,6 +42,8 @@ test_unit(void)
 
     inst = QNT_CreateInstance(min_k, max_k, q, r, 1e-9);
 
+    TEST_CHECK(min_k == QNT_GetMinK(inst));
+
     for (j = 0; j < 3000; j++) {
       x = TST_GetRandomDouble(0.0, 2e-6);
       QNT_Accumulate(inst, x);