qemu/qemu-progress.c
Jes Sorensen 6b837bc4a4 qemu-img: Initial progress printing support
This adds the basic infrastructure for supporting progress output
on the command line, as well as progress support for qemu-img commands
'rebase' and 'convert'.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-04-07 13:51:47 +02:00

90 lines
2.4 KiB
C

/*
* QEMU progress printing utility functions
*
* Copyright (C) 2011 Jes Sorensen <Jes.Sorensen@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu-common.h"
#include "osdep.h"
#include "sysemu.h"
#include <stdio.h>
struct progress_state {
int enabled;
float current;
float last_print;
float min_skip;
};
static struct progress_state state;
/*
* Simple progress print function.
* @percent relative percent of current operation
* @max percent of total operation
*/
static void progress_simple_print(void)
{
if (state.enabled) {
printf(" (%3.2f/100%%)\r", state.current);
fflush(stdout);
}
}
static void progress_simple_end(void)
{
if (state.enabled) {
printf("\n");
}
}
void qemu_progress_init(int enabled, float min_skip)
{
state.enabled = enabled;
state.min_skip = min_skip;
}
void qemu_progress_end(void)
{
progress_simple_end();
}
void qemu_progress_print(float percent, int max)
{
float current;
if (max == 0) {
current = percent;
} else {
current = state.current + percent / 100 * max;
}
if (current > 100) {
current = 100;
}
state.current = current;
if (current > (state.last_print + state.min_skip) ||
(current == 100) || (current == 0)) {
state.last_print = state.current;
progress_simple_print();
}
}