prosody
8087f5357f53
util/human/units.lua

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util/human/units.lua @ 12525:8087f5357f53 0.12

mod_smacks: Fix bounce of stanzas directed to full JID on unclean disconnect Fixes #1758 Introduced in 1ea01660c79a In e62025f949f9 to and from was inverted since it changed from acting on a reply to acting on the original stanza (or a clone thereof) Unsure of the purpose of this check, you don't usually send stanzas to your own full JID. Perhaps guarding against routing loops? The check was present in the original commit of mod_smacks, prosody-modules rev 9a7671720dec
author Kim Alvefur <zash@zash.se>
date Fri, 27 May 2022 12:05:47 +0200
parent 10903:c5f26f9adb31
child 12573:0f4feaf9ca64
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rev   line source
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1 local math_abs = math.abs;
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2 local math_ceil = math.ceil;
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3 local math_floor = math.floor;
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4 local math_log = math.log;
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5 local math_max = math.max;
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6 local math_min = math.min;
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7 local unpack = table.unpack or unpack; --luacheck: ignore 113
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8
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9 if math_log(10, 10) ~= 1 then
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10 -- Lua 5.1 COMPAT
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11 local log10 = math.log10;
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12 function math_log(n, base)
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13 return log10(n) / log10(base);
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14 end
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15 end
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16
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17 local large = {
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18 "k", 1000,
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19 "M", 1000000,
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20 "G", 1000000000,
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21 "T", 1000000000000,
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22 "P", 1000000000000000,
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23 "E", 1000000000000000000,
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24 "Z", 1000000000000000000000,
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25 "Y", 1000000000000000000000000,
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26 }
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27 local small = {
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28 "m", 0.001,
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29 "μ", 0.000001,
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30 "n", 0.000000001,
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31 "p", 0.000000000001,
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32 "f", 0.000000000000001,
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33 "a", 0.000000000000000001,
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34 "z", 0.000000000000000000001,
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35 "y", 0.000000000000000000000001,
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36 }
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37
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38 local binary = {
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39 "Ki", 2^10,
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40 "Mi", 2^20,
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41 "Gi", 2^30,
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42 "Ti", 2^40,
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43 "Pi", 2^50,
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44 "Ei", 2^60,
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45 "Zi", 2^70,
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46 "Yi", 2^80,
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47 }
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48
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49 local function adjusted_unit(n, b)
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50 local round = math_floor;
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51 local prefixes = large;
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52 local logbase = 1000;
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53 if b == 'b' then
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54 prefixes = binary;
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55 logbase = 1024;
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56 elseif n < 1 then
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57 prefixes = small;
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58 round = math_ceil;
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59 end
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60 local m = math_max(0, math_min(8, round(math_abs(math_log(math_abs(n), logbase)))));
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61 local prefix, multiplier = unpack(prefixes, m * 2-1, m*2);
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62 return multiplier or 1, prefix;
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63 end
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64
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65 -- n: number, the number to format
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66 -- unit: string, the base unit
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67 -- b: optional enum 'b', thousands base
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68 local function format(n, unit, b) --> string
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69 local fmt = "%.3g %s%s";
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70 if n == 0 then
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71 return fmt:format(n, "", unit);
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72 end
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73 local multiplier, prefix = adjusted_unit(n, b);
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74 return fmt:format(n / multiplier, prefix or "", unit);
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75 end
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76
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77 return {
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78 adjust = adjusted_unit;
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79 format = format;
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80 };