1 files changed, 69 insertions, 0 deletions
diff --git a/tools/jprof/intcnt.cpp b/tools/jprof/intcnt.cpp
new file mode 100644
index 0000000000..a87b6ccf74
--- /dev/null
+++ b/tools/jprof/intcnt.cpp
@@ -0,0 +1,69 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "intcnt.h"
+
+IntCount::IntCount() : numInts(0), iPair(nullptr) {}
+IntCount::~IntCount() { delete[] iPair; }
+int IntCount::getSize() { return numInts; }
+int IntCount::getCount(int pos) { return iPair[pos].cnt; }
+int IntCount::getIndex(int pos) { return iPair[pos].idx; }
+
+void IntCount::clear() {
+  delete[] iPair;
+  iPair = new IntPair[0];
+  numInts = 0;
+}
+
+int IntCount::countAdd(int index, int increment) {
+  if (numInts) {
+    // Do a binary search to find the element
+    int divPoint = 0;
+
+    if (index > iPair[numInts - 1].idx) {
+      divPoint = numInts;
+    } else if (index < iPair[0].idx) {
+      divPoint = 0;
+    } else {
+      int low = 0, high = numInts - 1;
+      int mid = (low + high) / 2;
+      while (1) {
+        mid = (low + high) / 2;
+
+        if (index < iPair[mid].idx) {
+          high = mid;
+        } else if (index > iPair[mid].idx) {
+          if (mid < numInts - 1 && index < iPair[mid + 1].idx) {
+            divPoint = mid + 1;
+            break;
+          } else {
+            low = mid + 1;
+          }
+        } else if (index == iPair[mid].idx) {
+          return iPair[mid].cnt += increment;
+        }
+      }
+    }
+
+    int i;
+    IntPair* tpair = new IntPair[numInts + 1];
+    for (i = 0; i < divPoint; i++) {
+      tpair[i] = iPair[i];
+    }
+    for (i = divPoint; i < numInts; i++) {
+      tpair[i + 1] = iPair[i];
+    }
+    ++numInts;
+    delete[] iPair;
+    iPair = tpair;
+    iPair[divPoint].idx = index;
+    iPair[divPoint].cnt = increment;
+    return increment;
+  } else {
+    iPair = new IntPair[1];
+    numInts = 1;
+    iPair[0].idx = index;
+    return iPair[0].cnt = increment;
+  }
+}