/*
 * AOPPA -- A program for extracting the AnarchyOnline resource database
 * MMAP input plugin.
 *
 * Copyright (C) 2003  Oskari Saarenmaa <auno@auno.org>.
 * All rights reserved.
 *
 * $Id: input-mmap.cc,v 1.3 2003/12/16 06:55:41 pickett Exp $
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 *
 */


#include <errno.h>
#include <stdio.h>
#include <time.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>

#include "aoppa.h"
#include "misc.h"
#include "parser.h"


int
parse_file(int patch, int type, const char *fn)
{
  FILE *fp;
  int cnt_all = 0, cnt_new = 0;
  struct stat st;
  time_t tstart, tend, telap;
  size_t size;
  void *mp;
  unsigned char *data;
  
  fp = fopen(fn, "r");
  if(fp == NULL)
  {
    debugf(DEBUG_SERIOUS, "Failed to open %s for reading (%s)\n", fn, strerror(errno));
    exit(1);
  }
  
  fstat(fileno(fp), &st);
  size = st.st_size;
  
  mp = mmap(NULL, size, PROT_READ, MAP_SHARED, fileno(fp), 0);
  data = (unsigned char*)mp;

  tstart = time(NULL);
  debugf(1, "Reading records from %s (%d, %d)\n", fn, patch, type);
  while((size_t)data-(size_t)mp < size)
  {
    size_t len;
    int aoid;
    
    if(memcmp(data, "AOID: ", 6) != 0)
      break;
    aoid = strtol((char*)(data+=6), (char**)&data, 10);
    len = strtoul((char*)(data+=5), (char**)&data, 10);
    data += 12; /* skip ahead to our data chunk */
    cnt_new += handle_item(patch, type, aoid, len, data);
    data += len+12;
    cnt_all ++;
  }
  debugf(1, "Ok, read total %d records, %d were new / modified\n", cnt_all, cnt_new);

  munmap(mp, size);
  fclose(fp);
  
  tend = time(NULL);
  
  telap = tend-tstart;
  if(telap < 1)
    telap = 1;
  debugf(1, "%d seconds elapsed, %d (%d/s) records processed\n",
    telap, cnt_all, cnt_all/telap);
  
  return cnt_new;
}

aoppa_plugin_t aoppa_plugin = 
{
  AOPPA_API_VERSION,
  AOPPA_INPUT,
  NULL,
  NULL,
  NULL,
  NULL,
  parse_file,
  "MMAP input plugin"
};