src/pacman/downloadprog.c


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/*
 *  downloadprog.c
 * 
 *  Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
 * 
 *  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 "config.h"
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include <libintl.h>
#include <math.h>

#include <alpm.h>
/* pacman */
#include "util.h"
#include "log.h"
#include "downloadprog.h"
#include "conf.h"

/* progress bar */
static float rate_last;
static int xfered_last;
static struct timeval initial_time;

/* pacman options */
extern config_t *config;

#define FILENAME_TRIM_LEN 23

void log_progress(const char *filename, int xfered, int total)
{
  const int infolen = 50;
  char *fname, *p; 

  float rate = 0.0, timediff = 0.0;
  unsigned int eta_h = 0, eta_m = 0, eta_s = 0;
  int percent;
  char rate_size = 'K', xfered_size = 'K';

  if(config->noprogressbar) {
    return;
  }

  /* this is basically a switch on xferred: 0, total, and anything else */
  if(xfered == 0) {
    /* set default starting values */
    gettimeofday(&initial_time, NULL);
    xfered_last = 0;
    rate_last = 0.0;
    timediff = get_update_timediff(1);
    rate = 0.0;
    eta_s = 0;
    set_output_padding(1); /* we need padding from pm_fprintf output */
  } else if(xfered == total) {
    /* compute final values */
    struct timeval current_time;
    float diff_sec, diff_usec;
    
    gettimeofday(&current_time, NULL);
    diff_sec = current_time.tv_sec - initial_time.tv_sec;
    diff_usec = current_time.tv_usec - initial_time.tv_usec;
    timediff = diff_sec + (diff_usec / 1000000.0);
    rate = (float)total / (timediff * 1024.0);

    /* round elapsed time to the nearest second */
    eta_s = (int)floorf(timediff + 0.5);

    set_output_padding(0); /* shut off padding */
  } else {
    /* compute current average values */
    timediff = get_update_timediff(0);

    if(timediff < UPDATE_SPEED_SEC) {
      /* return if the calling interval was too short */
      return;
    }
    rate = (float)(xfered - xfered_last) / (timediff * 1024.0);
    /* average rate to reduce jumpiness */
    rate = (float)(rate + 2*rate_last) / 3;
    eta_s = (unsigned int)(total - xfered) / (rate * 1024.0);
    rate_last = rate;
    xfered_last = xfered;
  }

  percent = (int)((float)xfered) / ((float)total) * 100;

  /* fix up time for display */
  eta_h = eta_s / 3600;
  eta_s -= eta_h * 3600;
  eta_m = eta_s / 60;
  eta_s -= eta_m * 60;

  fname = strdup(filename);
  if((p = strstr(fname, PM_EXT_PKG)) || (p = strstr(fname, PM_EXT_DB))) {
      *p = '\0';
  }
  if(strlen(fname) > FILENAME_TRIM_LEN) {
    fname[FILENAME_TRIM_LEN] = '\0';
  }

  /* Awesome formatting for progress bar.  We need a mess of Kb->Mb->Gb stuff
   * here. We'll use limit of 2048 for each until we get some empirical */
  /* rate_size = 'K'; was set above */
  if(rate > 2048.0) {
    rate /= 1024.0;
    rate_size = 'M';
    if(rate > 2048.0) {
      rate /= 1024.0;
      rate_size = 'G';
      /* we should not go higher than this for a few years (9999.9 Gb/s?)*/
    }
  }

  xfered /= 1024; /* convert to K by default */
  /* xfered_size = 'K'; was set above */
  if(xfered > 2048) {
    xfered /= 1024;
    xfered_size = 'M';
    if(xfered > 2048) {
      xfered /= 1024;
      xfered_size = 'G';
      /* I should seriously hope that archlinux packages never break
       * the 9999.9GB mark... we'd have more serious problems than the progress
       * bar in pacman */ 
    }
  }

  printf(" %-*s %6d%c %#6.1f%c/s %02u:%02u:%02u", FILENAME_TRIM_LEN, fname, 
         xfered, xfered_size, rate, rate_size, eta_h, eta_m, eta_s);

  free(fname);
  
  fill_progress(percent, getcols() - infolen);
  return;
}

/* vim: set ts=2 sw=2 noet: */