1/* ----------------------------------------------------------------------- *
2 *
3 *   Copyright 2009 Pierre-Alexandre Meyer - All Rights Reserved
4 *
5 *   Permission is hereby granted, free of charge, to any person
6 *   obtaining a copy of this software and associated documentation
7 *   files (the "Software"), to deal in the Software without
8 *   restriction, including without limitation the rights to use,
9 *   copy, modify, merge, publish, distribute, sublicense, and/or
10 *   sell copies of the Software, and to permit persons to whom
11 *   the Software is furnished to do so, subject to the following
12 *   conditions:
13 *
14 *   The above copyright notice and this permission notice shall
15 *   be included in all copies or substantial portions of the Software.
16 *
17 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
19 *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
21 *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 *   OTHER DEALINGS IN THE SOFTWARE.
25 *
26 * -----------------------------------------------------------------------
27 */
28
29#include <stdio.h>
30#include <string.h>
31
32/* Computing div(x,y) */
33#define sub(val) (((val%1024)*100)>>10)
34#define sub_dec(val) (((val%1000)*100)/1000)
35
36void sectors_to_size(int sectors, char *buffer)
37{
38    int b = (sectors / 2);
39    int mib = b >> 10;
40    int gib = mib >> 10;
41    int tib = gib >> 10;
42
43    if (tib > 0)
44	sprintf(buffer, "%3d.%02d TiB", tib,sub(gib));
45    else if (gib > 0)
46	sprintf(buffer, "%3d.%02d GiB", gib,sub(mib));
47    else if (mib > 0)
48	sprintf(buffer, "%3d.%02d MiB", mib,sub(b));
49    else
50	sprintf(buffer, "%d B", b);
51}
52
53void sectors_to_size_dec(char *previous_unit, int *previous_size, char *unit,
54			 int *size, int sectors)
55{
56    *size = sectors / 2;	// Converting to bytes
57    strlcpy(unit, "KB", 2);
58    strlcpy(previous_unit, unit, 2);
59    *previous_size = *size;
60    if (*size > 1000) {
61	*size = *size / 1000;
62	strlcpy(unit, "MB", 2);
63	if (*size > 1000) {
64	    *previous_size = *size;
65	    *size = *size / 1000;
66	    strlcpy(previous_unit, unit, 2);
67	    strlcpy(unit, "GB", 2);
68	    if (*size > 1000) {
69		*previous_size = *size;
70		*size = *size / 1000;
71		strlcpy(previous_unit, unit, 2);
72		strlcpy(unit, "TB", 2);
73	    }
74	}
75    }
76}
77
78/* Return the human readable size of device
79 * This function avoid disk's size rounding while
80 * not using float as they aren't currently supported */
81void sectors_to_size_dec2(int sectors, char *buffer)
82{
83    int b = (sectors / 2);
84    int mib = b / 1000;
85    int gib = mib / 1000;
86    int tib = gib / 1000;
87
88    if (tib > 0)
89	sprintf(buffer, "%3d.%02d TB", tib,sub_dec(gib));
90    else if (gib > 0)
91	sprintf(buffer, "%3d.%02d GB", gib,sub_dec(mib));
92    else if (mib > 0)
93	sprintf(buffer, "%3d.%02d MB", mib,sub_dec(b));
94    else
95	sprintf(buffer, "%d B", b);
96}
97