util: add a vercmp function to compare version numbers

It is simple, supports simple x.y.z type numeric versions,
and does not attempt any kind of validation

2 files changed, 45 insertions, 1 deletions

diff --git a/tests/unit_tests/CMakeLists.txt b/tests/unit_tests/CMakeLists.txt
index e70ed1a24..04e47e49b 100644
--- a/tests/unit_tests/CMakeLists.txt
+++ b/tests/unit_tests/CMakeLists.txt
@@ -58,7 +58,8 @@ set(unit_tests_sources
   uri.cpp
   varint.cpp
   ringct.cpp
-  output_selection.cpp)
+  output_selection.cpp
+  vercmp.cpp)
 
 set(unit_tests_headers
   unit_tests_utils.h)
diff --git a/tests/unit_tests/vercmp.cpp b/tests/unit_tests/vercmp.cpp
new file mode 100644
index 000000000..d48dfdf7c
--- /dev/null
+++ b/tests/unit_tests/vercmp.cpp
@@ -0,0 +1,43 @@
+// Copyright (c) 2017, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "gtest/gtest.h"
+
+#include "common/util.h"
+
+TEST(vercmp, empty) { ASSERT_TRUE(tools::vercmp("", "") == 0); }
+TEST(vercmp, empty0) { ASSERT_TRUE(tools::vercmp("", "0") == 0); }
+TEST(vercmp, empty1) { ASSERT_TRUE(tools::vercmp("0", "") == 0); }
+TEST(vercmp, zero_zero) { ASSERT_TRUE(tools::vercmp("0", "0") == 0); }
+TEST(vercmp, one_one) { ASSERT_TRUE(tools::vercmp("1", "1") == 0); }
+TEST(vercmp, one_two) { ASSERT_TRUE(tools::vercmp("1", "2") < 0); }
+TEST(vercmp, two_one) { ASSERT_TRUE(tools::vercmp("2", "1") > 0); }
+TEST(vercmp, ten_nine) { ASSERT_TRUE(tools::vercmp("10", "9") > 0); }
+TEST(vercmp, one_dot_ten_one_dot_nine) { ASSERT_TRUE(tools::vercmp("1.10", "1.9") > 0); }
+TEST(vercmp, one_one_dot_nine) { ASSERT_TRUE(tools::vercmp("1", "1.9") < 0); }
+