add initial Path class

src/core/Path.cc

@@ -0,0 +1,33 @@
+#include "Path.h"
+
+std::string Path::dirname(const std::string & s)
+{
+    size_t pos = s.find_last_of("/\\");
+    if (pos == std::string::npos)
+    {
+        return ".";
+    }
+    if ((pos == 0u) || (pos == 2u && s[1] == ':'))
+    {
+        return std::string(s, 0, pos + 1u);
+    }
+    return std::string(s, 0, pos);
+}
+
+std::string Path::join(const std::string & first, const std::string & second)
+{
+    if (first == "")
+    {
+        return second;
+    }
+    if (second == "")
+    {
+        return first;
+    }
+    char last = first[first.size() - 1u];
+    if ((last == '/') || (last == '\\'))
+    {
+        return first + second;
+    }
+    return first + "/" + second;
+}

src/core/Path.h

@@ -0,0 +1,13 @@
+#ifndef PATH_H
+#define PATH_H
+
+#include <string>
+
+class Path
+{
+public:
+    static std::string dirname(const std::string & s);
+    static std::string join(const std::string & first, const std::string & second);
+};
+
+#endif

test/src/test_Path.cc

@@ -0,0 +1,63 @@
+#include "gtest/gtest.h"
+#include "Path.h"
+
+TEST(Path_dirname, returns_dot_when_no_directory_component)
+{
+    EXPECT_EQ(".", Path::dirname("a.file"));
+}
+
+TEST(Path_dirname, returns_dirname_for_relative_path)
+{
+    EXPECT_EQ("a/dir", Path::dirname("a/dir/file"));
+}
+
+TEST(Path_dirname, returns_single_slash_for_short_absolute_path)
+{
+    EXPECT_EQ("/", Path::dirname("/usr"));
+}
+
+TEST(Path_dirname, returns_full_absolute_dirname_for_long_absolute_path)
+{
+    EXPECT_EQ("/usr/share", Path::dirname("/usr/share/pixmaps"));
+}
+
+TEST(Path_dirname, returns_drive_letter_for_forward_slash_windows_path)
+{
+    EXPECT_EQ("C:/", Path::dirname("C:/Data"));
+}
+
+TEST(Path_dirname, returns_drive_letter_for_windows_path)
+{
+    EXPECT_EQ("C:\\", Path::dirname("C:\\Data"));
+}
+
+TEST(Path_dirname, returns_dirname_for_absolute_windows_path)
+{
+    EXPECT_EQ("X:\\a\\b\\c", Path::dirname("X:\\a\\b\\c\\d"));
+}
+
+TEST(Path_dirname, returns_single_slash_for_windows_absolute_path)
+{
+    EXPECT_EQ("\\", Path::dirname("\\foo"));
+}
+
+
+TEST(Path_join, returns_joined_path)
+{
+    EXPECT_EQ("path1/path2", Path::join("path1", "path2"));
+}
+
+TEST(Path_join, returns_first_path_when_second_is_empty)
+{
+    EXPECT_EQ("path1", Path::join("path1", ""));
+}
+
+TEST(Path_join, returns_second_path_when_first_is_empty)
+{
+    EXPECT_EQ("path2", Path::join("", "path2"));
+}
+
+TEST(Path_join, does_not_add_extra_slash_when_first_path_already_ends_with_one)
+{
+    EXPECT_EQ("/var/run", Path::join("/var/", "run"));
+}