From d3bf941f12d1ed453250cb74168a9999bda04a74 Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Sun, 3 Feb 2019 06:07:00 -0500
Subject: add km_set_copy()

---
 km-set.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 km.h     |  3 +++
 2 files changed, 47 insertions(+)

diff --git a/km-set.c b/km-set.c
index 58792c0..ca028f8 100644
--- a/km-set.c
+++ b/km-set.c
@@ -179,6 +179,50 @@ km_set_push(
   return true;
 }
 
+bool
+km_set_copy(
+  km_set_t * const dst,
+  const km_set_t * const src
+) {
+  if (src->state != KM_SET_STATE_INIT || src->state != KM_SET_STATE_NORMALIZED) {
+    // return failure
+    return false;
+  }
+
+  // init dst set
+  if (!km_set_init(dst, &(src->shape), src->num_rows)) {
+    // return failure
+    return false;
+  }
+
+  // copy floats
+  const size_t num_floats = src->shape.num_floats;
+  if (num_floats > 0) {
+    const size_t stride = sizeof(float) * num_floats;
+
+    // copy floats
+    memcpy(dst->floats, src->floats, stride * src->num_rows);
+
+    // copy bounds
+    memcpy(dst->bounds, src->bounds, 2 * stride);
+  }
+
+  // copy ints
+  const size_t num_ints = src->shape.num_ints;
+  if (num_ints > 0) {
+    const size_t stride = sizeof(int) * num_ints;
+
+    // copy ints
+    memcpy(dst->ints, src->ints, stride * src->num_rows);
+  }
+
+  // increment row count
+  dst->num_rows = src->num_rows;
+
+  // return success
+  return true;
+}
+
 bool
 km_set_normalize(
   km_set_t * const set
diff --git a/km.h b/km.h
index 1d00d50..9a58a6d 100644
--- a/km.h
+++ b/km.h
@@ -64,6 +64,9 @@ void km_set_fini(km_set_t * const);
 // append rows to data set, growing set if necessary
 _Bool km_set_push(km_set_t *, const size_t, const float *, const int *);
 
+// deep copy data set
+_Bool km_set_copy(km_set_t * const, const km_set_t * const);
+
 // normalize data set
 _Bool km_set_normalize(km_set_t * const);
 
-- 
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