2 files changed, 77 insertions, 0 deletions
diff --git a/src/include/memory_chunk.h b/src/include/memory_chunk.h
index c106dba..baa5679 100644
--- a/src/include/memory_chunk.h
+++ b/src/include/memory_chunk.h
@@ -290,6 +290,25 @@ public:
     }
 
     /**
+     * MemoryChunk::set_content:
+     * @offset: the offset in this MemoryChunk.
+     * @data: the data to be copied.
+     * @returns: whether the data is copied successfully.
+     *
+     * Data are written directly to the memory area in this MemoryChunk.
+     *
+     */
+    template <typename T>
+    bool set_content(size_t offset, T data){
+        const size_t len = sizeof(data);
+        size_t cursize = std_lite::max(size(), offset + len);
+        ensure_has_space(offset + len);
+        memmove(m_data_begin + offset, &data, len);
+        m_data_end = m_data_begin + cursize;
+        return true;
+    }
+
+    /**
      * MemoryChunk::append_content:
      * @data: the begin of the data to be copied.
      * @len: the length of the data to be copied.
@@ -357,6 +376,21 @@ public:
     }
 
     /**
+     * MemoryChunk::get_content:
+     * @offset: the offset in this MemoryChunk.
+     * @returns: the content
+     *
+     * Get the content in this MemoryChunk.
+     *
+     */
+    template <typename T>
+    T get_content(size_t offset) const {
+        T value;
+        memcpy(&value, m_data_begin + offset, sizeof(value));
+        return value;
+    }
+
+    /**
      * MemoryChunk::compact_memory:
      *
      * Compact memory, reduce the size.
diff --git a/src/include/unaligned_memory.h b/src/include/unaligned_memory.h
new file mode 100644
index 0000000..27b2f19
--- /dev/null
+++ b/src/include/unaligned_memory.h
@@ -0,0 +1,43 @@
+#ifndef UNALIGNED_MEMORY_H
+#define UNALIGNED_MEMORY_H
+
+#include <cstring>
+
+/**
+ * UnalignedMemory: Safe unaligned memory access.
+ * 
+ * Some instruction sets, or some instructions in some instruction sets
+ * require that memory access is aligned to a specific boundary. These
+ * instructions may trap on unaligned access.
+ * 
+ * This class provides methods to load and store values at unaligned
+ * addresses. It ensures that the compiler doesn't generate instructions
+ * that could trap on the unaligned memory access.
+ */
+
+namespace pinyin{
+    template <typename T>
+    class UnalignedMemory{
+    public:
+        /**
+         * Read a value from a possibly unaligned memory address.
+         * 
+         */
+        static T load(const void * src) {
+            T value;
+            memcpy(&value, src, sizeof(T));
+            return value;
+        }
+
+        /**
+         * Store a value into a possibly unaligned memory address.
+         * 
+         */
+        static void store(T value, void * dest) {
+            memcpy(dest, &value, sizeof(T));
+        }
+    };
+};
+
+
+#endif