From 19b758ce8b238f0bd77790cc38f0708ed6c64142 Mon Sep 17 00:00:00 2001
From: Timothy Flynn <trflynn89@pm.me>
Date: Thu, 6 Oct 2022 10:45:59 -0400
Subject: [PATCH] LibUnicode: Add to-and-from string converters for
 NormalizationForm

---
 Userland/Libraries/LibUnicode/Normalize.cpp | 28 +++++++++++++++++++++
 Userland/Libraries/LibUnicode/Normalize.h   |  3 +++
 2 files changed, 31 insertions(+)

diff --git a/Userland/Libraries/LibUnicode/Normalize.cpp b/Userland/Libraries/LibUnicode/Normalize.cpp
index c6792f5121..8f5a59f7c3 100644
--- a/Userland/Libraries/LibUnicode/Normalize.cpp
+++ b/Userland/Libraries/LibUnicode/Normalize.cpp
@@ -17,6 +17,34 @@ namespace Unicode {
 Optional<CodePointDecomposition const&> __attribute__((weak)) code_point_decomposition(u32) { return {}; }
 Span<CodePointDecomposition const> __attribute__((weak)) code_point_decompositions() { return {}; }
 
+NormalizationForm normalization_form_from_string(StringView form)
+{
+    if (form == "NFD"sv)
+        return NormalizationForm::NFD;
+    if (form == "NFC"sv)
+        return NormalizationForm::NFC;
+    if (form == "NFKD"sv)
+        return NormalizationForm::NFKD;
+    if (form == "NFKC"sv)
+        return NormalizationForm::NFKC;
+    VERIFY_NOT_REACHED();
+}
+
+StringView normalization_form_to_string(NormalizationForm form)
+{
+    switch (form) {
+    case NormalizationForm::NFD:
+        return "NFD"sv;
+    case NormalizationForm::NFC:
+        return "NFC"sv;
+    case NormalizationForm::NFKD:
+        return "NFKD"sv;
+    case NormalizationForm::NFKC:
+        return "NFKC"sv;
+    }
+    VERIFY_NOT_REACHED();
+}
+
 ALWAYS_INLINE static bool is_starter(u32 code_point)
 {
     return Unicode::canonical_combining_class(code_point) == 0;
diff --git a/Userland/Libraries/LibUnicode/Normalize.h b/Userland/Libraries/LibUnicode/Normalize.h
index 57ae03426a..23531afefe 100644
--- a/Userland/Libraries/LibUnicode/Normalize.h
+++ b/Userland/Libraries/LibUnicode/Normalize.h
@@ -25,6 +25,9 @@ enum class NormalizationForm {
     NFKC
 };
 
+NormalizationForm normalization_form_from_string(StringView form);
+StringView normalization_form_to_string(NormalizationForm form);
+
 [[nodiscard]] String normalize(StringView string, NormalizationForm form);
 
 }