From 32a2b6119dc1926943161d5f75d03b6a8592c05e Mon Sep 17 00:00:00 2001
From: Ne_Eo <NeeEoo@users.noreply.github.com>
Date: Sun, 3 Nov 2024 22:30:17 +0100
Subject: [PATCH] Helper functions for startsWith and endsWith

---
 include/hxString.h |  3 +++
 src/String.cpp     | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/include/hxString.h b/include/hxString.h
index b53ddd4a3..b440f6b14 100644
--- a/include/hxString.h
+++ b/include/hxString.h
@@ -267,6 +267,9 @@ class HXCPP_EXTERN_CLASS_ATTRIBUTES String
    }
    #endif
 
+   bool __StartsWith(const String &inValue) const;
+   bool __EndsWith(const String &inValue) const;
+
 
    ::String &operator+=(const ::String &inRHS);
    ::String operator+(const ::String &inRHS) const;
diff --git a/src/String.cpp b/src/String.cpp
index a9a8cb8af..cd4e74f89 100644
--- a/src/String.cpp
+++ b/src/String.cpp
@@ -1676,6 +1676,48 @@ int String::compare(const ::String &inRHS) const
 }
 #endif
 
+bool String::__StartsWith(const String &inValue) const
+{
+   int l = inValue.length;
+
+   if (l > length)
+      return false;
+
+   bool s016 = isUTF16Encoded();
+   bool s116 = inValue.isUTF16Encoded();
+   if (s016 && s116)
+   {
+      return memcmp(__w, inValue.__w, l * sizeof(char16_t)) == 0;
+   }
+   else if (s016 || s116)
+   {
+      return s016 ? StrMatch(__w, inValue.__s, l) :
+                    StrMatch(inValue.__w, __s, l);
+   }
+   return memcmp(__s, inValue.__s, l) == 0;
+}
+
+bool String::__EndsWith(const String &inValue) const
+{
+  int l = inValue.length;
+
+   if (l > length)
+      return false;
+
+   bool s016 = isUTF16Encoded();
+   bool s116 = inValue.isUTF16Encoded();
+   if (s016 && s116)
+   {
+      return memcmp(__w + (length - l), inValue.__w, l * sizeof(char16_t)) == 0;
+   }
+   else if (s016 || s116)
+   {
+      return s016 ? StrMatch(__w + (length - l), inValue.__s, l) :
+                  StrMatch(inValue.__w, __s + (length - l), l);
+   }
+   return memcmp(__s + (length - l), inValue.__s, l) == 0;
+}
+
 
 namespace hx
 {