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utils-std

Collection of commonly available Unix tools git clone https://anongit.hacktivis.me/git/utils-std.git

humanize.c (873B)

    

  1. // utils-std: Collection of commonly available Unix tools
  2. // SPDX-FileCopyrightText: 2017 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
  3. // SPDX-License-Identifier: MPL-2.0
  5. #define _POSIX_C_SOURCE 200809L
  7. #include "../lib/humanize.h"
  9. #include <stdio.h> // snprintf
  11. struct si_scale
  12. dtosi(double num, bool iec)
  13. {
  14. #define PFX 11
  15. 	const char *si_prefixes[PFX] = {"", "k", "M", "G", "T", "P", "E", "Z", "Y", "R", "Q"};
  16. 	const char *iec_prefixes[PFX] = {
  17. 	    "B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB", "RiB", "QiB"};
  19. 	int div = iec ? 1024 : 1000;
  20. 	const char **prefixes = iec ? iec_prefixes : si_prefixes;
  22. 	struct si_scale ret = {
  23. 	    .number = num,
  24. 	    .prefix = "",
  25. 	    .exponant = 0,
  26. 	};
  28. 	while(ret.number > div && ret.exponant < PFX)
  29. 	{
  30. 		ret.number /= div;
  31. 		ret.exponant += 1;
  32. 	}
  34. 	ret.prefix = prefixes[ret.exponant];
  36. 	return ret;
  37. }