hexflow.h

/*
 *  Copyright (c) 2002-2007    National Research Council
 *
 *  All rights reserved.
 *
 *  This material is confidential and proprietary information of
 *  National Research Council Canada ("Confidential Information").
 *  This Confidential Information may only be used and reproduced
 *  in accordance with the terms of the license agreement.
 *
 */
 
#ifndef __INCLUDED__SCOPIRA_TOO_HEXFLOW__
#define __INCLUDED__SCOPIRA_TOO_HEXFLOW__

#include <scopira/tool/flow.h>

namespace scopira
{
  namespace tool
  {
    class hexiflow;
    class hexoflow;

    SCOPIRA_EXPORT extern const char* hexchars; // "0123...EF"
    SCOPIRA_EXPORT extern const char* lowerhexchars; // "0123...ef"

    inline bool is_hex(char c) {
      return
        (c >= '0' && c <= '9') ||
        (c >= 'a' && c <= 'f') ||
        (c >= 'A' && c <= 'F');
    }

    inline byte_t char_to_hex(char c) {
      // a == 97, A == 65, '0' == 48
      // this if-then chain order is important
      if (c <= '9')
        return c - '0';           // 0..
      else if (c <= 'F')
        return c - 'A' + 10;      // assume A..
      else
        return c - 'a' + 10;      // a..
    }
  }
}

class scopira::tool::hexiflow : public scopira::tool::iflow_i
{
  protected:
    count2_ptr< iflow_i > dm_in;

  public:
    SCOPIRA_EXPORT hexiflow(bool doref, iflow_i* in);

    SCOPIRA_EXPORT virtual bool failed(void) const;

    SCOPIRA_EXPORT virtual size_t read(byte_t* _buf, size_t _maxsize);
    SCOPIRA_EXPORT virtual size_t read_byte(byte_t &out);

    SCOPIRA_EXPORT void open(iflow_i* in);
    SCOPIRA_EXPORT void close(void);
};

class scopira::tool::hexoflow : public scopira::tool::oflow_i
{
  protected:
    count2_ptr< oflow_i > dm_out;

  public:
    SCOPIRA_EXPORT hexoflow(bool doref, oflow_i* out);

    SCOPIRA_EXPORT virtual bool failed(void) const;

    SCOPIRA_EXPORT virtual size_t write(const byte_t* _buf, size_t _size);
    SCOPIRA_EXPORT virtual size_t write_byte(byte_t b);

    SCOPIRA_EXPORT void open(oflow_i* in);
    SCOPIRA_EXPORT void close(void);
};

#endif