intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 49 insertions, 0 deletions

diff --git a/library/cpp/monlib/counters/counters.cpp b/library/cpp/monlib/counters/counters.cpp
new file mode 100644
index 0000000000..50dca4c577
--- /dev/null
+++ b/library/cpp/monlib/counters/counters.cpp
@@ -0,0 +1,49 @@
+
+#include "counters.h"
+
+namespace NMonitoring {
+    char* PrettyNumShort(i64 val, char* buf, size_t size) {
+        static const char shorts[] = {' ', 'K', 'M', 'G', 'T', 'P', 'E'};
+        unsigned i = 0;
+        i64 major = val;
+        i64 minor = 0;
+        const unsigned imax = sizeof(shorts) / sizeof(char);
+        for (i = 0; i < imax; i++) {
+            if (major >> 10 == 0)
+                break;
+            else {
+                minor = major - (major >> 10 << 10);
+                major = major >> 10;
+            }
+        }
+        minor = (minor * 10) >> 10;
+
+        if (i == 0 || i >= imax)
+            *buf = '\0';
+        else
+            snprintf(buf, size, "%" PRId64 ".%" PRId64 "%c", major, minor, shorts[i]);
+
+        return buf;
+    }
+
+    char* PrettyNum(i64 val, char* buf, size_t size) {
+        Y_ASSERT(buf);
+        if (size < 4) {
+            buf[0] = 0;
+            return buf;
+        }
+        PrettyNumShort(val, buf + 2, size - 3);
+        if (buf[2] == 0) {
+            *buf = '\0';
+        } else {
+            size_t len = 2 + strnlen(buf + 2, size - 4);
+            Y_ASSERT(len < size);
+            buf[0] = ' ';
+            buf[1] = '(';
+            buf[len] = ')';
+            buf[len + 1] = '\0';
+        }
+
+        return buf;
+    }
+}