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      1 /*
      2  * sim_progress.c --- simple progress meter
      3  *
      4  * Copyright (C) 1997, 1998 by Theodore Ts'o and
      5  * 	PowerQuest, Inc.
      6  *
      7  * Copyright (C) 1999, 2000 by Theosore Ts'o
      8  *
      9  * %Begin-Header%
     10  * This file may be redistributed under the terms of the GNU Public
     11  * License.
     12  * %End-Header%
     13  */
     14 
     15 #include "resize2fs.h"
     16 
     17 struct ext2_sim_progress {
     18 	FILE	*f;
     19 	char	*label;
     20 	int	labelwidth;
     21 	int	barwidth;
     22 	__u32	maxdone;
     23 	__u32	current;
     24 	int	shown;
     25 	int	flags;
     26 };
     27 
     28 static errcode_t ext2fs_progress_display(ext2_sim_progmeter prog)
     29 {
     30 	int	i, width;
     31 
     32 	fputs(prog->label, prog->f);
     33 	width = prog->labelwidth - strlen(prog->label);
     34 	while (width-- > 0)
     35 		putc(' ', prog->f);
     36 	if (prog->labelwidth + prog->barwidth > 80) {
     37 		fputs("\n", prog->f);
     38 		for (width = prog->labelwidth; width > 0; width--)
     39 			putc(' ', prog->f);
     40 	}
     41 	for (i=0; i < prog->barwidth; i++)
     42 		putc('-', prog->f);
     43 	for (i=0; i < prog->barwidth; i++)
     44 		putc('\b', prog->f);
     45 	fflush(prog->f);
     46 	return 0;
     47 }
     48 
     49 
     50 void ext2fs_progress_update(ext2_sim_progmeter prog, __u32 current)
     51 {
     52 	int		old_level, level, num, i;
     53 
     54 	level = prog->barwidth * current / prog->maxdone;
     55 	old_level = prog->barwidth * prog->current / prog->maxdone;
     56 	prog->current = current;
     57 
     58 	num = level - old_level;
     59 	if (num == 0)
     60 		return;
     61 
     62 	if (num > 0) {
     63 		for (i=0; i < num; i++)
     64 			putc('X', prog->f);
     65 	} else {
     66 		num = -num;
     67 		for (i=0; i < num; i++)
     68 			putc('\b', prog->f);
     69 		for (i=0; i < num; i++)
     70 			putc('-', prog->f);
     71 		for (i=0; i < num; i++)
     72 			putc('\b', prog->f);
     73 	}
     74 	fflush(prog->f);
     75 }
     76 
     77 errcode_t ext2fs_progress_init(ext2_sim_progmeter *ret_prog,
     78 			       const char *label,
     79 			       int labelwidth, int barwidth,
     80 			       __u32 maxdone, int flags)
     81 {
     82 	ext2_sim_progmeter	prog;
     83 	errcode_t		retval;
     84 
     85 	retval = ext2fs_get_mem(sizeof(struct ext2_sim_progress), &prog);
     86 	if (retval)
     87 		return retval;
     88 	memset(prog, 0, sizeof(struct ext2_sim_progress));
     89 
     90 	retval = ext2fs_get_mem(strlen(label)+1, &prog->label);
     91 	if (retval) {
     92 		free(prog);
     93 		return retval;
     94 	}
     95 	strcpy(prog->label, label);
     96 	prog->labelwidth = labelwidth;
     97 	prog->barwidth = barwidth;
     98 	prog->flags = flags;
     99 	prog->maxdone = maxdone;
    100 	prog->current = 0;
    101 	prog->shown = 0;
    102 	prog->f = stdout;
    103 
    104 	*ret_prog = prog;
    105 
    106 	return ext2fs_progress_display(prog);
    107 }
    108 
    109 void ext2fs_progress_close(ext2_sim_progmeter prog)
    110 {
    111 
    112 	if (prog->label)
    113 		ext2fs_free_mem(&prog->label);
    114 	ext2fs_free_mem(&prog);
    115 	printf("\n");
    116 	return;
    117 }
    118