scirfmmon/source/qchar.c

//$Header: /home/dashley/cvsrep/e3ft_gpl01/e3ft_gpl01/winprojs/scirfmmon/source/qchar.c,v 1.8 2009/01/11 18:37:23 dashley Exp $
//--------------------------------------------------------------------------------
//Copyright 2008 David T. Ashley
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//This source code and any program in which it is compiled/used is provided under the GNU GENERAL
//PUBLIC LICENSE, Version 3, full license text below.
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//PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
//IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
//ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
//
//  16. Limitation of Liability.
//
//  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
//WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
//THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
//GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
//USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
//DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
//PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
//EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
//SUCH DAMAGES.
//
//  17. Interpretation of Sections 15 and 16.
//
//  If the disclaimer of warranty and limitation of liability provided
//above cannot be given local legal effect according to their terms,
//reviewing courts shall apply local law that most closely approximates
//an absolute waiver of all civil liability in connection with the
//Program, unless a warranty or assumption of liability accompanies a
//copy of the Program in return for a fee.
//
//                     END OF TERMS AND CONDITIONS
//
//            How to Apply These Terms to Your New Programs
//
//  If you develop a new program, and you want it to be of the greatest
//possible use to the public, the best way to achieve this is to make it
//free software which everyone can redistribute and change under these terms.
//
//  To do so, attach the following notices to the program.  It is safest
//to attach them to the start of each source file to most effectively
//state the exclusion of warranty; and each file should have at least
//the "copyright" line and a pointer to where the full notice is found.
//
//    <one line to give the program's name and a brief idea of what it does.>
//    Copyright (C) <year>  <name of author>
//
//    This program is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    This program is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
//Also add information on how to contact you by electronic and paper mail.
//
//  If the program does terminal interaction, make it output a short
//notice like this when it starts in an interactive mode:
//
//    <program>  Copyright (C) <year>  <name of author>
//    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
//    This is free software, and you are welcome to redistribute it
//    under certain conditions; type `show c' for details.
//
//The hypothetical commands `show w' and `show c' should show the appropriate
//parts of the General Public License.  Of course, your program's commands
//might be different; for a GUI interface, you would use an "about box".
//
//  You should also get your employer (if you work as a programmer) or school,
//if any, to sign a "copyright disclaimer" for the program, if necessary.
//For more information on this, and how to apply and follow the GNU GPL, see
//<http://www.gnu.org/licenses/>.
//
//  The GNU General Public License does not permit incorporating your program
//into proprietary programs.  If your program is a subroutine library, you
//may consider it more useful to permit linking proprietary applications with
//the library.  If this is what you want to do, use the GNU Lesser General
//Public License instead of this License.  But first, please read
//<http://www.gnu.org/philosophy/why-not-lgpl.html>.
//-------------------------------------------------------------------------------------------------
//--------------------------------------------------------------------------------
//This file is part of scirfmmon.
//
//scirfmmon is free software: you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.
//
//scirfmmon is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with scirfmmon (see the file copying.txt).  If not, 
//see <http://www.gnu.org/licenses/>.
//--------------------------------------------------------------------------------
#define MODULE_QCHAR

#include <stdio.h>

#include "qchar.h"

#include "c_main.h"


//Inserts an event into the intermediate queue.
//
void QCHAR_inceq_i_ev(QCHAR_INCEQ *in_q, int in_channel, const struct __timeb64 *in_ts, QCHAR_EVENT in_ev)
   {
   if (in_q->n >= QCHAR_INCEQ_N)
      {
      C_MAIN_queue_overflow = TRUE;
      }
   else
      {
      FillMemory(&(in_q->body[in_q->n]), sizeof(in_q->body[0]), 0);
      in_q->body[in_q->n].channel = in_channel;
      in_q->body[in_q->n].ev = in_ev;
      in_q->body[in_q->n].ts = *in_ts;
      (in_q->n)++;
      }
   }

//Copies from a ReadFile() buffer into an intermediate queue.  The input
//queue is then reset.
//
void QCHAR_rfcq_inceq_transfer(QCHAR_RFCQ *in_src, int in_channel, QCHAR_INCEQ *out_dst)
   {
   unsigned i;

   for (i=0; i < in_src->n; i++)
      {
      if (out_dst->n < QCHAR_INCEQ_N)
         {
         //Space for at least one character in destination queue.
         //
         //Zero the slot it is going into.
         FillMemory(&(out_dst->body[out_dst->n]),  sizeof(out_dst->body[0]), 0);
         //
                 //Channel is whatever is provided.
         out_dst->body[out_dst->n].channel = in_channel;
                 //
         //Event type is character.
         out_dst->body[out_dst->n].ev = QCHAR_EV_CHAR;
         //
         //Character is the one supplied.
         out_dst->body[out_dst->n].c = in_src->body[i];
         //
         //Timestamp is the one supplied.
         memcpy(&(out_dst->body[out_dst->n].ts), &(in_src->ts), sizeof(in_src->ts));
         //
         //And on to the next entry.
         (out_dst->n)++;
         }
      else
         {
         out_dst->ovf = TRUE;
         C_MAIN_queue_overflow = TRUE;
            //Queue overflow, fatal.
         }
      }
   //
   in_src->n = 0;
   }


//Copies from an intermediate queue to the sync queue and resets the intermediate queue.
//
void QCHAR_inceq_tsceq_transfer(QCHAR_INCEQ *in_src, QCHAR_TSCEQ *out_dst)
   {
   unsigned i;

   for (i=0; i < in_src->n; i++)
      {
      if (out_dst->n < QCHAR_TSCEQ_N)
         {
         //Space for at least one event in destination queue.
         //
         //Zero the target.  This ensures consistency if the copy is incomplete.
         FillMemory(&(out_dst->body[out_dst->n]), sizeof(out_dst->body[0]), 0);
         //
         //Copy the entry of interest.
         out_dst->body[out_dst->n] = in_src->body[i];
         //
         //And on to the next entry.
         (out_dst->n)++;
         }
      else
         {
         out_dst->ovf = TRUE;
         C_MAIN_queue_overflow = TRUE;
            //Queue overflow, fatal.
         }
      }
   //
   in_src->n = 0;
   }

//Returns the number of elements in a PTCEQ.
//
unsigned QCHAR_ptceq_nelem(QCHAR_PTCEQ *in_arg)
   {
   return(in_arg->n);
   }


//Puts an item into a PTCEQ.
//
void QCHAR_ptceq_put(QCHAR_PTCEQ *in_q, const QCHAR_TSE *in_item)
   {
   if (in_q->n < QCHAR_PTCEQ_N)
      {
      memcpy(&(in_q->body[in_q->putpt]), in_item, sizeof(in_q->body[0]));
      (in_q->putpt)++;
      if (in_q->putpt >= QCHAR_PTCEQ_N)
         in_q->putpt = 0;
      (in_q->n)++;
      }
   else
      {
      //Queue overflow--fatal.
      in_q->ovf = TRUE;
      C_MAIN_queue_overflow = TRUE;
      }
   }
//
//Gets an item from a PTCEQ.  If successful, result will be non-zero, otherwise
//will be zero.
//
int QCHAR_ptceq_get(QCHAR_PTCEQ *in_q, QCHAR_TSE *out_item)
   {
   if (in_q->n != 0)
      {
      memcpy(out_item, &(in_q->body[in_q->getpt]), sizeof(in_q->body[0]));
      (in_q->getpt)++;
      if (in_q->getpt >= QCHAR_PTCEQ_N)
         in_q->getpt = 0;
      (in_q->n)--;
      return(TRUE);
      }
   else
      {
      //Queue is empty.
      return(FALSE);
      }
   }
//
//Empties a sync queue into a PTCEQ and resets the sync queue.
//
void QCHAR_tsceq_ptceq_transfer(QCHAR_TSCEQ *in_src, QCHAR_PTCEQ *out_dst)
   {
   unsigned i;

   for (i=0; i < in_src->n; i++)
      {
      QCHAR_ptceq_put(out_dst, &(in_src->body[i]));
      }
   //
   in_src->n = 0;
   }


//Returns the number of elements in a CCEQ.
//
unsigned QCHAR_cceq_nelem(const QCHAR_CCEQ *in_arg)
   {
   return(in_arg->n);
   }


//Puts an item into a CCEQ.
//
void QCHAR_cceq_put(QCHAR_CCEQ *in_q, const QCHAR_TSE *in_item)
   {
   if (in_q->n < QCHAR_CCEQ_N)
      {
      memcpy(&(in_q->body[in_q->putpt]), in_item, sizeof(in_q->body[0]));
      (in_q->putpt)++;
      if (in_q->putpt >= QCHAR_CCEQ_N)
         in_q->putpt = 0;
      (in_q->n)++;
      }
   else
      {
      //Queue overflow--fatal.
      in_q->ovf = TRUE;
      C_MAIN_queue_overflow = TRUE;
      }
   }


//Gets an item from a CCEQ.  If successful, result will be non-zero, otherwise
//will be zero.
//
int QCHAR_cceq_get(QCHAR_CCEQ *in_q, QCHAR_TSE *out_item)
   {
   if (in_q->n != 0)
      {
      memcpy(out_item, &(in_q->body[in_q->getpt]), sizeof(in_q->body[0]));
      (in_q->getpt)++;
      if (in_q->getpt >= QCHAR_CCEQ_N)
         in_q->getpt = 0;
      (in_q->n)--;
      return(TRUE);
      }
   else
      {
      //Queue is empty.
      return(FALSE);
      }
   }


//Peeks at the next item from a CCEQ without removing it.  If successful,
//result will be non-zero, otherwise will be zero.
//
int QCHAR_cceq_peek(QCHAR_CCEQ *in_q, QCHAR_TSE *out_item)
   {
   if (in_q->n != 0)
      {
      memcpy(out_item, &(in_q->body[in_q->getpt]), sizeof(in_q->body[0]));
      return(TRUE);
      }
   else
      {
      //Queue is empty.
      return(FALSE);
      }
   }


//Peeks at the nth character into a CCEQ without removing any of them.  If
//successful, result will be non-zero, otherwise will be zero.  The oldest
//character in the queue is element 0.
//
int QCHAR_cceq_peek_n(QCHAR_CCEQ *in_q, unsigned in_itemno, QCHAR_TSE *out_item)
   {
   unsigned idx;
   unsigned i;

   if (in_q->n > in_itemno)
      {
      //Calculate the index.
      idx = in_q->getpt;
      for (i=0; i<in_itemno; i++)
         {
         idx++;
         if (idx >= QCHAR_CCEQ_N)
            idx = 0;
         }

      //Extract the item.
      memcpy(out_item, &(in_q->body[idx]), sizeof(in_q->body[0]));
      return(TRUE);
      }
   else
      {
      //Queue does not contain enough entries to get that one.
      //printf("Peek violation.  Queue elements: %d.  Item requested: %d.\n", in_q->n, in_itemno);
      return(FALSE);
      }
   }


const char *QCHAR_cvcinfo(void)
   {
   return("$Header: /home/dashley/cvsrep/e3ft_gpl01/e3ft_gpl01/winprojs/scirfmmon/source/qchar.c,v 1.8 2009/01/11 18:37:23 dashley Exp $");
   }


const char *QCHAR_hvcinfo(void)
   {
   return(QCHAR_H_VERSION);
   }


//**************************************************************************
// $Log: qchar.c,v $
// Revision 1.8  2009/01/11 18:37:23  dashley
// Edits.
//
// Revision 1.7  2009/01/11 06:11:31  dashley
// Edits.
//
// Revision 1.6  2009/01/11 05:06:36  dashley
// Edits.
//
// Revision 1.5  2008/12/18 19:46:25  dashley
// Substantial edits.
//
// Revision 1.4  2008/12/17 22:46:45  dashley
// Edits.
//
// Revision 1.3  2008/12/17 21:40:57  dashley
// Edits.
//
// Revision 1.2  2008/12/15 21:10:08  dashley
// GPL license text added to source code and also to program output.
//
// Revision 1.1  2008/12/14 03:08:00  dashley
// Initial checkin.
//**************************************************************************
// End of $RCSfile: qchar.c,v $.