From c854a3225e2e66211c6de699751016dd13ad632f Mon Sep 17 00:00:00 2001
From: naga <toritonsuibu0527@gmail.com>
Date: Sat, 23 Sep 2023 01:31:27 +0900
Subject: [PATCH] Add Write(const char* const , size_t) for #177

---
 src/SerialPort.cpp         | 65 ++++++++++++++++++++++++++++++++++++++
 src/libserial/SerialPort.h |  8 +++++
 2 files changed, 73 insertions(+)

diff --git a/src/SerialPort.cpp b/src/SerialPort.cpp
index 4b77912..d6bd144 100644
--- a/src/SerialPort.cpp
+++ b/src/SerialPort.cpp
@@ -378,6 +378,14 @@ namespace LibSerial
          */
         void Write(const std::string& dataString) ;
 
+        /**
+         * @brief Writes a char* to the serial port.
+         * 
+         * @param dataCharArray The char type array to write to the serial port.
+         * @param size The size of dataCharArray.
+         */
+        void Write(const char* const dataCharArray, size_t size) ;
+
         /**
          * @brief Writes a single byte to the serial port.
          * @param charBuffer The byte to be written to the serial port.
@@ -764,6 +772,12 @@ namespace LibSerial
         mImpl->Write(dataString) ;
     }
 
+    void
+    SerialPort::Write(const char* const dataCharArray, size_t size)
+    {
+        mImpl->Write(dataCharArray, size) ;
+    }
+
     void
     SerialPort::WriteByte(const char charBuffer)
     {
@@ -2657,6 +2671,57 @@ namespace LibSerial
         }
     }
 
+    inline 
+    void 
+    SerialPort::Implementation::Write(const char* const dataCharArray, size_t size)
+    {
+        // Throw an exception if the serial port is not open.
+        if (not this->IsOpen())
+        {
+            throw NotOpen(ERR_MSG_PORT_NOT_OPEN) ;
+        }
+
+        size_t number_of_bytes = size ;
+
+        // Nothing needs to be done if there is no data in the string.
+        if (number_of_bytes <= 0)
+        {
+            return ;
+        }
+
+        // Local variables.
+        size_t number_of_bytes_written = 0 ;
+        size_t number_of_bytes_remaining = number_of_bytes ;
+
+        // Write the data to the serial port. Keep retrying if EAGAIN
+        // error is received and EWOULDBLOCK is not received.
+        ssize_t write_result = 0 ;
+
+        while (number_of_bytes_remaining > 0)
+        {
+            write_result = call_with_retry(write,
+                                           this->mFileDescriptor,
+                                           &dataCharArray[number_of_bytes_written],
+                                           number_of_bytes_remaining) ;
+
+            if (write_result >= 0)
+            {
+                number_of_bytes_written += write_result ;
+                number_of_bytes_remaining = number_of_bytes - number_of_bytes_written ;
+
+                if (number_of_bytes_remaining == 0)
+                {
+                    break ;
+                }
+            }
+            else if (write_result <= 0 &&
+                     errno != EWOULDBLOCK)
+            {
+                throw std::runtime_error(std::strerror(errno)) ;
+            }
+        }
+    }
+
     inline
     void
     SerialPort::Implementation::WriteByte(const char charBuffer)
diff --git a/src/libserial/SerialPort.h b/src/libserial/SerialPort.h
index 09ed2bd..a7b38fb 100644
--- a/src/libserial/SerialPort.h
+++ b/src/libserial/SerialPort.h
@@ -397,6 +397,14 @@ namespace LibSerial
          */
         void Write(const std::string& dataString) ;
 
+        /**
+         * @brief Writes a char* to the serial port.
+         * 
+         * @param dataCharArray The char type array to write to the serial port.
+         * @param size The size of dataCharArray.
+         */
+        void Write(const char* const dataCharArray, size_t size) ;
+
         /**
          * @brief Writes a single byte to the serial port.
          * @param charbuffer The byte to write to the serial port.