Make byte writer find API const

Author: dshil

components/ocs_core/byte_writer.cpp

@@ -24,6 +24,16 @@ size_t ByteWriter::get_cap() const {
     return size_;
 }
 
+ssize_t ByteWriter::find(uint8_t data) const {
+    for (size_t n = 0; n < get_len(); ++n) {
+        if (data_[n] == data) {
+            return n;
+        }
+    }
+
+    return -1;
+}
+
 uint8_t* ByteWriter::get_data() {
     return data_;
 }
@@ -51,16 +61,6 @@ void ByteWriter::resize(size_t size) {
     offset_ = std::min(size_, size);
 }
 
-ssize_t ByteWriter::find(uint8_t data) {
-    for (size_t n = 0; n < get_len(); ++n) {
-        if (data_[n] == data) {
-            return n;
-        }
-    }
-
-    return -1;
-}
-
 size_t ByteWriter::left_() const {
     return size_ - offset_;
 }

components/ocs_core/byte_writer.h

@@ -28,6 +28,9 @@ class ByteWriter : private core::NonCopyable<> {
     //! Return the size of the underlying array of bytes.
     size_t get_cap() const;
 
+    //! Find the position of the byte.
+    ssize_t find(uint8_t data) const;
+
     //! Return the underlying data.
     uint8_t* get_data();
 
@@ -43,9 +46,6 @@ class ByteWriter : private core::NonCopyable<> {
     //! Change number of written bytes.
     void resize(size_t size);
 
-    //! Find the position of the byte.
-    ssize_t find(uint8_t data);
-
     //! Write any integer value.
     template <typename T> bool write(const T& t) {
         static_assert(std::is_integral<T>::value, "require integral type");