web_buffers.h

/*NB_REVISION*/
 
/*NB_COPYRIGHT*/
 
#ifndef _WEB_BUFFERS_H
#define _WEB_BUFFERS_H
#include <nbstring.h>
 

 

class buffer_object
{
   public:
    // A write of ZERO bytes indicates end of data stream
    virtual int WriteData(const unsigned char *pCopyFrom, int num_bytes) = 0;
    virtual int ReadFrom(int fd) = 0;
    virtual void ProcessHeader(const char * hdr) {};
};

class SimpleBufferObject : public buffer_object
{
protected:
    unsigned char *cp_to;
    int space_left;
    int used;
   public:
 
    virtual int WriteData(const unsigned char *pCopyFrom, int num_bytes);
    virtual int ReadFrom(int fd);
 
    SimpleBufferObject(unsigned char *p, int len)
    {
        cp_to = p;
        space_left = len;
        used = 0;
    };
    int AmountUsed() { return used; };
};

class StringBufferObject : public buffer_object
{
    NBString & TheString;
   public:
 
    virtual int WriteData(const unsigned char *pCopyFrom, int num_bytes);
    virtual int ReadFrom(int fd);
 
    StringBufferObject(NBString & s) :TheString(s){};
};

 
#endif