File content as of revision 4:684f39d0c346:

#ifndef _ROS_std_msgs_Float64MultiArray_h
#define _ROS_std_msgs_Float64MultiArray_h

#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include "ros/msg.h"
#include "std_msgs/MultiArrayLayout.h"

namespace std_msgs
{

  class Float64MultiArray : public ros::Msg
  {
public:
    std_msgs::MultiArrayLayout layout;
    unsigned char data_length;
    double st_data;
    double * data;

    virtual int serialize(unsigned char *outbuffer) const
     {
        int offset = 0;
        offset += this->layout.serialize(outbuffer + offset);
        *(outbuffer + offset++) = data_length;
        *(outbuffer + offset++) = 0;
        *(outbuffer + offset++) = 0;
        *(outbuffer + offset++) = 0;
        for ( unsigned char i = 0; i < data_length; i++) {
            union {
                double real;
                uint64_t base;
            } u_datai;
            u_datai.real = this->data[i];
            *(outbuffer + offset + 0) = (u_datai.base >> (8 * 0)) & 0xFF;
            *(outbuffer + offset + 1) = (u_datai.base >> (8 * 1)) & 0xFF;
            *(outbuffer + offset + 2) = (u_datai.base >> (8 * 2)) & 0xFF;
            *(outbuffer + offset + 3) = (u_datai.base >> (8 * 3)) & 0xFF;
            *(outbuffer + offset + 4) = (u_datai.base >> (8 * 4)) & 0xFF;
            *(outbuffer + offset + 5) = (u_datai.base >> (8 * 5)) & 0xFF;
            *(outbuffer + offset + 6) = (u_datai.base >> (8 * 6)) & 0xFF;
            *(outbuffer + offset + 7) = (u_datai.base >> (8 * 7)) & 0xFF;
            offset += sizeof(this->data[i]);
        }
        return offset;
    }

    virtual int deserialize(unsigned char *inbuffer) {
        int offset = 0;
        offset += this->layout.deserialize(inbuffer + offset);
        unsigned char data_lengthT = *(inbuffer + offset++);
        if (data_lengthT > data_length)
            this->data = (double*)realloc(this->data, data_lengthT * sizeof(double));
        offset += 3;
        data_length = data_lengthT;
        for ( unsigned char i = 0; i < data_length; i++) {
            union {
                double real;
                uint64_t base;
            } u_st_data;
            u_st_data.base = 0;
            u_st_data.base |= ((typeof(u_st_data.base)) (*(inbuffer + offset + 0))) << (8 * 0);
            u_st_data.base |= ((typeof(u_st_data.base)) (*(inbuffer + offset + 1))) << (8 * 1);
            u_st_data.base |= ((typeof(u_st_data.base)) (*(inbuffer + offset + 2))) << (8 * 2);
            u_st_data.base |= ((typeof(u_st_data.base)) (*(inbuffer + offset + 3))) << (8 * 3);
            u_st_data.base |= ((typeof(u_st_data.base)) (*(inbuffer + offset + 4))) << (8 * 4);
            u_st_data.base |= ((typeof(u_st_data.base)) (*(inbuffer + offset + 5))) << (8 * 5);
            u_st_data.base |= ((typeof(u_st_data.base)) (*(inbuffer + offset + 6))) << (8 * 6);
            u_st_data.base |= ((typeof(u_st_data.base)) (*(inbuffer + offset + 7))) << (8 * 7);
            this->st_data = u_st_data.real;
            offset += sizeof(this->st_data);
            memcpy( &(this->data[i]), &(this->st_data), sizeof(double));
        }
        return offset;
    }

    virtual const char * getType(){ return "std_msgs/Float64MultiArray"; };
    virtual const char * getMD5(){ return "4b7d974086d4060e7db4613a7e6c3ba4"; };

  };

}
#endif