Implements custom tolower and toupper functions.

This commit implements custom equivalents for the C and C++ `tolower` and `toupper` Standard Library functions.
In addition it implements a utility function to capitalize the first letter of a string.

1 files changed, 39 insertions, 0 deletions

diff --git a/src/test/util_tests.cpp b/src/test/util_tests.cpp
index b2960446eb..8e2f5abe66 100644
--- a/src/test/util_tests.cpp
+++ b/src/test/util_tests.cpp
@@ -1217,4 +1217,43 @@ BOOST_AUTO_TEST_CASE(test_DirIsWritable)
     fs::remove(tmpdirname);
 }
 
+BOOST_AUTO_TEST_CASE(test_ToLower)
+{
+    BOOST_CHECK_EQUAL(ToLower('@'), '@');
+    BOOST_CHECK_EQUAL(ToLower('A'), 'a');
+    BOOST_CHECK_EQUAL(ToLower('Z'), 'z');
+    BOOST_CHECK_EQUAL(ToLower('['), '[');
+    BOOST_CHECK_EQUAL(ToLower(0), 0);
+    BOOST_CHECK_EQUAL(ToLower(255), 255);
+
+    std::string testVector;
+    Downcase(testVector);
+    BOOST_CHECK_EQUAL(testVector, "");
+
+    testVector = "#HODL";
+    Downcase(testVector);
+    BOOST_CHECK_EQUAL(testVector, "#hodl");
+
+    testVector = "\x00\xfe\xff";
+    Downcase(testVector);
+    BOOST_CHECK_EQUAL(testVector, "\x00\xfe\xff");
+}
+
+BOOST_AUTO_TEST_CASE(test_ToUpper)
+{
+    BOOST_CHECK_EQUAL(ToUpper('`'), '`');
+    BOOST_CHECK_EQUAL(ToUpper('a'), 'A');
+    BOOST_CHECK_EQUAL(ToUpper('z'), 'Z');
+    BOOST_CHECK_EQUAL(ToUpper('{'), '{');
+    BOOST_CHECK_EQUAL(ToUpper(0), 0);
+    BOOST_CHECK_EQUAL(ToUpper(255), 255);
+}
+
+BOOST_AUTO_TEST_CASE(test_Capitalize)
+{
+    BOOST_CHECK_EQUAL(Capitalize(""), "");
+    BOOST_CHECK_EQUAL(Capitalize("bitcoin"), "Bitcoin");
+    BOOST_CHECK_EQUAL(Capitalize("\x00\xfe\xff"), "\x00\xfe\xff");
+}
+
 BOOST_AUTO_TEST_SUITE_END()