Add strdup()

luna/include/luna/OwnedStringView.h

@@ -22,6 +22,12 @@ class OwnedStringView
         return m_length;
     }
 
+    const char& operator[](usize index) const
+    {
+        expect(index < m_length, "OwnedStringView: index out of range");
+        return m_string[index];
+    }
+
   private:
     char* m_string{nullptr};
     usize m_length{0};

luna/include/luna/String.h

@@ -8,4 +8,6 @@ extern "C"
     int memcmp(const void* a, const void* b, usize n);
     void* memmove(void* dest, const void* src, usize n);
     usize strlen(const char* str);
+
+    char* strdup(const char* str);
 }

luna/src/OwnedStringView.cpp

@@ -23,14 +23,14 @@ OwnedStringView::OwnedStringView(char* c_str)
 
 OwnedStringView::~OwnedStringView()
 {
-    if (m_string) destroy_array(m_string);
+    if (m_string) raw_free(m_string);
 }
 
 Result<OwnedStringView> OwnedStringView::clone() const
 {
-    char* buf = TRY(make_array<char>(m_length + 1));
+    char* const c_str = strdup(m_string);
 
-    memcpy(buf, m_string, m_length + 1);
+    if (!c_str) return err(ENOMEM);
 
-    return OwnedStringView{buf};
+    return OwnedStringView{c_str};
 }

luna/src/String.cpp

@@ -1,3 +1,4 @@
+#include <luna/Alloc.h>
 #include <luna/String.h>
 
 extern "C"
@@ -44,4 +45,16 @@ extern "C"
             ;
         return (usize)(i - str);
     }
+
+    char* strdup(const char* str)
+    {
+        const usize len = strlen(str);
+
+        char* dest = (char*)raw_malloc(len + 1);
+        if (!dest) return nullptr;
+
+        memcpy(dest, str, len + 1);
+
+        return dest;
+    }
 }