qemu-progress.c

   1 /*
   2  * QEMU progress printing utility functions
   3  *
   4  * Copyright (C) 2011 Jes Sorensen <Jes.Sorensen@redhat.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu-common.h"
  26 #include "osdep.h"
  27 #include "sysemu.h"
  28 #include <stdio.h>
  29
  30 struct progress_state {
  31     int enabled;
  32     float current;
  33     float last_print;
  34     float min_skip;
  35 };
  36
  37 static struct progress_state state;
  38
  39 /*
  40  * Simple progress print function.
  41  * @percent relative percent of current operation
  42  * @max percent of total operation
  43  */
  44 static void progress_simple_print(void)
  45 {
  46     if (state.enabled) {
  47         printf("    (%3.2f/100%%)\r", state.current);
  48         fflush(stdout);
  49     }
  50 }
  51
  52 static void progress_simple_end(void)
  53 {
  54     if (state.enabled) {
  55         printf("\n");
  56     }
  57 }
  58
  59 void qemu_progress_init(int enabled, float min_skip)
  60 {
  61     state.enabled = enabled;
  62     state.min_skip = min_skip;
  63 }
  64
  65 void qemu_progress_end(void)
  66 {
  67     progress_simple_end();
  68 }
  69
  70 void qemu_progress_print(float percent, int max)
  71 {
  72     float current;
  73
  74     if (max == 0) {
  75         current = percent;
  76     } else {
  77         current = state.current + percent / 100 * max;
  78     }
  79     if (current > 100) {
  80         current = 100;
  81     }
  82     state.current = current;
  83
  84     if (current > (state.last_print + state.min_skip) ||
  85         (current == 100) || (current == 0)) {
  86         state.last_print = state.current;
  87         progress_simple_print();
  88     }
  89 }