common: fs_util: Add buffer to string view utility functions

These functions allow to construct a string view from an input buffer, avoiding the copy done by the non string view counterparts. However, callers must be cognizant of the viewed buffer's lifetime to avoid a use-after-free.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/common/fs/fs_util.h b/src/common/fs/fs_util.h
index 1ec82eb35..1620d38c9 100644
--- a/src/common/fs/fs_util.h
+++ b/src/common/fs/fs_util.h
@@ -38,6 +38,15 @@ concept IsChar = std::same_as<T, char>;
 [[nodiscard]] std::u8string BufferToU8String(std::span<const u8> buffer);
 
 /**
+ * Same as BufferToU8String, but returns a string view of the buffer.
+ *
+ * @param buffer Buffer of bytes
+ *
+ * @returns UTF-8 encoded std::u8string_view.
+ */
+[[nodiscard]] std::u8string_view BufferToU8StringView(std::span<const u8> buffer);
+
+/**
  * Converts a std::u8string or std::u8string_view to a UTF-8 encoded std::string.
  *
  * @param u8_string UTF-8 encoded u8string
@@ -58,6 +67,15 @@ concept IsChar = std::same_as<T, char>;
 [[nodiscard]] std::string BufferToUTF8String(std::span<const u8> buffer);
 
 /**
+ * Same as BufferToUTF8String, but returns a string view of the buffer.
+ *
+ * @param buffer Buffer of bytes
+ *
+ * @returns UTF-8 encoded std::string_view.
+ */
+[[nodiscard]] std::string_view BufferToUTF8StringView(std::span<const u8> buffer);
+
+/**
  * Converts a filesystem path to a UTF-8 encoded std::string.
  *
  * @param path Filesystem path