C++17ification.

C++17ification!

- Filesystem interaction now uses std::filesystem::path.
- Usage of const char*, std::string have been changed to
  std::string_view where appropriate.
- Usage of printf-style functions changed to use fmt.

src/xenia/base/utf8.h

@@ -0,0 +1,137 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2020 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_BASE_UTF8_H_
+#define XENIA_BASE_UTF8_H_
+
+#include <string>
+#include <vector>
+
+#include "xenia/base/platform.h"
+
+namespace xe::utf8 {
+
+std::string lower_ascii(const std::string_view view);
+std::string upper_ascii(const std::string_view view);
+
+size_t hash_fnv1a(const std::string_view view);
+size_t hash_fnv1a_case(const std::string_view view);
+
+// Splits the given string on any delimiters and returns all parts.
+std::vector<std::string_view> split(const std::string_view path,
+                                    const std::string_view delimiters);
+
+bool equal_z(const std::string_view left, const std::string_view right);
+
+bool equal_case(const std::string_view left, const std::string_view right);
+
+bool equal_case_z(const std::string_view left, const std::string_view right);
+
+std::string_view::size_type find_any_of(const std::string_view haystack,
+                                        const std::string_view needles);
+
+std::string_view::size_type find_any_of_case(const std::string_view haystack,
+                                             const std::string_view needles);
+
+std::string_view::size_type find_first_of(const std::string_view haystack,
+                                          const std::string_view needle);
+
+// find_first_of string, case insensitive.
+std::string_view::size_type find_first_of_case(const std::string_view haystack,
+                                               const std::string_view needle);
+
+bool starts_with(const std::string_view haystack,
+                 const std::string_view needle);
+
+bool starts_with_case(const std::string_view haystack,
+                      const std::string_view needle);
+
+bool ends_with(const std::string_view haystack, const std::string_view needle);
+
+bool ends_with_case(const std::string_view haystack,
+                    const std::string_view needle);
+
+// Splits the given path on any valid path separator and returns all parts.
+std::vector<std::string_view> split_path(const std::string_view path);
+
+// Joins two path segments with the given separator.
+std::string join_paths(const std::string_view left_path,
+                       const std::string_view right_path,
+                       char32_t sep = kPathSeparator);
+
+std::string join_paths(std::vector<std::string_view> paths,
+                       char32_t sep = kPathSeparator);
+
+inline std::string join_paths(
+    std::initializer_list<const std::string_view> paths,
+    char32_t sep = kPathSeparator) {
+  std::string result;
+  for (auto path : paths) {
+    result = join_paths(result, path, sep);
+  }
+  return result;
+}
+
+inline std::string join_guest_paths(const std::string_view left_path,
+                                    const std::string_view right_path) {
+  return join_paths(left_path, right_path, kGuestPathSeparator);
+}
+
+inline std::string join_guest_paths(std::vector<std::string_view> paths) {
+  return join_paths(paths, kGuestPathSeparator);
+}
+
+inline std::string join_guest_paths(
+    std::initializer_list<const std::string_view> paths) {
+  return join_paths(paths, kGuestPathSeparator);
+}
+
+// Replaces all path separators with the given value and removes redundant
+// separators.
+std::string fix_path_separators(const std::string_view path,
+                                char32_t new_sep = kPathSeparator);
+
+inline std::string fix_guest_path_separators(const std::string_view path) {
+  return fix_path_separators(path, kGuestPathSeparator);
+}
+
+// Find the top directory name or filename from a path.
+std::string find_name_from_path(const std::string_view path,
+                                char32_t sep = kPathSeparator);
+
+inline std::string find_name_from_guest_path(const std::string_view path) {
+  return find_name_from_path(path, kGuestPathSeparator);
+}
+
+std::string find_base_name_from_path(const std::string_view path,
+                                     char32_t sep = kPathSeparator);
+
+inline std::string find_base_name_from_guest_path(const std::string_view path) {
+  return find_base_name_from_path(path, kGuestPathSeparator);
+}
+
+// Get parent path of the given directory or filename.
+std::string find_base_path(const std::string_view path,
+                           char32_t sep = kPathSeparator);
+
+inline std::string find_base_guest_path(const std::string_view path) {
+  return find_base_path(path, kGuestPathSeparator);
+}
+
+// Canonicalizes a path, removing ..'s.
+std::string canonicalize_path(const std::string_view path,
+                              char32_t sep = kPathSeparator);
+
+inline std::string canonicalize_guest_path(const std::string_view path) {
+  return canonicalize_path(path, kGuestPathSeparator);
+}
+
+}  // namespace xe::utf8
+
+#endif  // XENIA_BASE_UTF8_H_