1 files changed, 120 insertions, 0 deletions
diff --git a/src/include/usr/ecmddatabuffer/ecmdDataBuffer.H b/src/include/usr/ecmddatabuffer/ecmdDataBuffer.H
new file mode 100644
index 000000000..afb438431
--- /dev/null
+++ b/src/include/usr/ecmddatabuffer/ecmdDataBuffer.H
@@ -0,0 +1,120 @@
+#ifndef ECMDDATABUFFER_H
+#define ECMDDATABUFFER_H
+
+/**
+ * @file ecmdDataBuffer.H
+ * @brief Provides a means to handle data from the eCMD C API
+ *
+ * @todo - This is only created to compile code.  Needs to be replaced with John Farrugia's version
+ *
+ */
+
+//----------------------------------------------------------------------
+//  Constants
+//----------------------------------------------------------------------
+/* Define these if for some reason we are building without ecmdReturnCodes.H */
+#define ECMD_ERR_ECMD                           0x01000000 ///< Error came from eCMD
+#define ECMD_DBUF_SUCCESS                       0x0    ///< DataBuffer returned successfully
+
+/**
+ @brief Provides a means to handle data from the eCMD C API
+*/
+class ecmdDataBufferBase {
+
+public:
+
+  /** @name ecmdDataBufferBase Constructors */
+  /**
+   * @brief Default Constructor
+   * @post buffer is not allocated, can be allocated later with setWordLength, setCapacity or setBitLength
+   */
+  ecmdDataBufferBase();
+
+  /**
+   * @brief Constructor
+   * @param i_numBits Size of data in bits to initialize
+   * @post ecmdDataBufferBase is initialized and zero'd out
+   */
+  explicit ecmdDataBufferBase(uint32_t i_numBits);
+
+  /**
+   * @brief Default Destructor
+   */
+  virtual ~ecmdDataBufferBase();
+
+  /**
+   * @brief Called by the destructor, available to user to reset buffer to default constructor state
+   * @retval ECMD_DBUF_SUCCESS on success
+   * @retval ECMD_DBUF_NOT_OWNER when called on buffer not owned
+   * @retval nonzero on failure
+   * @post Memory deallocated and size set to 0
+   */
+  uint32_t clear();
+
+  /**
+   * @brief Reinitialize the Buffer to specified length
+   * @param i_newNumBits Length of new buffer in bits
+   * @retval ECMD_DBUF_SUCCESS on success
+   * @retval ECMD_DBUF_INIT_FAIL failure occurred setting new length
+   * @retval ECMD_DBUF_NOT_OWNER when called on buffer not owned
+   * @post Buffer is reinitialized and zero'd out
+   *
+   * NOTE : Capacity will be adjusted to fit new size if neccesary
+   * CAUTION : All data stored in buffer will be lost
+   */
+  uint32_t  setBitLength(uint32_t i_newNumBits);
+
+  /**
+   * @brief Reinitialize the internal buffer to specified length
+   * @param i_newNumWords length of internal data buffer in words
+   * @retval ECMD_DBUF_SUCCESS on success
+   * @retval ECMD_DBUF_INIT_FAIL failure occurred setting new length
+   * @retval ECMD_DBUF_NOT_OWNER when called on buffer not owned
+   * @post Internal buffer is reinitialized and zero'd out.  Requests to decrease the capacity are ignored
+   *
+   * CAUTION : All data stored in buffer will be lost
+   */
+  uint32_t setCapacity (uint32_t i_newNumWords);
+
+
+  /**
+   * @brief Set a doubleword of data in buffer
+   * @param i_doublewordoffset Offset of doubleword to set
+   * @param i_value 64 bits of data to put into doubleword
+   * @retval ECMD_DBUF_SUCCESS on success
+   * @retval ECMD_DBUF_BUFFER_OVERFLOW i_doublewordoffset is not contained in the size of this buffer
+   *
+   * NOTE : If the buffer length != double word boundary, when setting the last double word
+   *        data in i_value past the buffer length is cleared before being stored in the buffer
+   */
+  uint32_t setDoubleWord(uint32_t i_doublewordoffset, uint64_t i_value);
+
+  /**
+   * @brief Fetch a doubleword from ecmdDataBuffer
+   * @param i_doublewordoffset Offset of doubleword to fetch
+   * @retval Value of doubleword requested
+   */
+  uint64_t getDoubleWord(uint32_t i_doublewordoffset) const;
+
+  /**
+   * @brief Return the length of the buffer in words
+   * @retval Buffer length in words rounded up
+   */
+  uint32_t   getWordLength() const;
+
+  /**
+   * @brief Clear entire buffer to 0's
+   * @retval ECMD_DBUF_SUCCESS on success
+   */
+  uint32_t flushTo0();
+
+protected:
+  uint32_t iv_Capacity;         ///< Actual buffer capacity - always >= getNumWords()
+  uint32_t iv_NumBits;          ///< Specified buffer size in bits
+  uint32_t *iv_Data;            ///< Pointer to buffer inside iv_RealData
+  uint32_t *iv_RealData;        ///< Real buffer - with header and tail
+  uint32_t iv_LocalData[4];     ///< If the buffer is <= 64 bits, we'll store the data locally in the class
+  bool     iv_UserOwned;        ///< Whether or not this buffer owns the data
+};
+
+#endif  /* ECMDDATABUFFER_H */