LXR syslinux/com32/hdt/hdt-util.c

   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