From c927cbddc52d3b68f6703cfe8336357b6a47b693 Mon Sep 17 00:00:00 2001
From: Alec Murphy <alec@checksum.fail>
Date: Thu, 25 Sep 2025 11:15:59 -0400
Subject: [PATCH] System/Libraries/String: Add String.Lower()

---
 System/Libraries/String.HC | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/System/Libraries/String.HC b/System/Libraries/String.HC
index 6ec1e65..7667d32 100644
--- a/System/Libraries/String.HC
+++ b/System/Libraries/String.HC
@@ -60,6 +60,20 @@ Bool @string_ends_with(U8* fragment, U8* str)
     return !MemCmp(fragment, str + StrLen(str) - StrLen(fragment), StrLen(fragment));
 }
 
+U0 @string_lower(U8* s)
+{
+    while (*s) {
+        switch (*s) {
+        case 'A' ... 'Z':
+            *s += 32;
+            break;
+        default:
+            break;
+        }
+        ++s;
+    }
+}
+
 U8* @string_replace(U8* s, U8* oldW, U8* newW)
 {
     if (!StrFind(oldW, s)) {
@@ -163,6 +177,7 @@ class @string
     Bool (*BeginsWith)(U8* fragment, U8* str);
     Bool (*EndsWith)(U8* fragment, U8* str);
     Bool (*IsNumber)(U8* s);
+    U0 (*Lower)(U8* s);
     U8* (*Replace)(U8* s, U8* oldW, U8* newW);
     U8** (*Split)(U8* s, U8 ch = '\n', I64 * cnt);
     U0 (*Trim)(U8* s, U8 ch = NULL, I64 mode = TRIM_BOTH);
@@ -173,6 +188,7 @@ String.Append = &@string_append;
 String.BeginsWith = &@string_begins_with;
 String.EndsWith = &@string_ends_with;
 String.IsNumber = &@string_is_number;
+String.Lower = &@string_lower;
 String.Replace = &@string_replace;
 String.Split = &@string_split;
 String.Trim = &@string_trim;