Update dstr to use Arena

src/strings/dstr/dstr.h

@@ -0,0 +1,28 @@
+#ifndef DSTR_H
+#define DSTR_H
+
+#include "aliases.h"
+#include "mem_arena.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+typedef struct dstr String;
+
+String *wapp_dstr_with_capacity(u64 capacity, Arena *arena);
+String *wapp_dstr_from_string(const char *str, Arena *arena);
+String *wapp_dstr_update(String **dst, const char *src, Arena *arena);
+String *wapp_dstr_concat(String **dst, const char *src, Arena *arena);
+void wapp_dstr_clear(String *str);
+void wapp_dstr_print(const String *str);
+i64 wapp_dstr_find(const String *str, const char *substr);
+u64 wapp_dstr_length(const String *str);
+u64 wapp_dstr_capacity(const String *str);
+const char *wapp_dstr_to_cstr(const String *str);
+
+#ifdef __cplusplus
+}
+#endif // __cplusplus
+
+#endif // !DSTR_H