prosody
1b657605ea29
fallbacks/bit.lua

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fallbacks/bit.lua @ 10864:1b657605ea29

mod_vcard_legacy: Remove semi-broken support for multiple avatars Nobody does this. If someone wants to they should go use the PEP method directly instead. Additionally, this got in the way of doing multiple avatars The PEP Way, since it treated each 'data' as a distinct avatar with an optional corresponding 'metadata', which is not how it works.
author Kim Alvefur <zash@zash.se>
date Mon, 01 Jun 2020 17:37:54 +0200
parent 7499:b4f781ed7045
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1522
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Matthew Wild <mwild1@gmail.com>
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1 -- Prosody IM
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Matthew Wild <mwild1@gmail.com>
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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Florian Zeitz <florob@babelmonkeys.de>
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4 --
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Matthew Wild <mwild1@gmail.com>
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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Matthew Wild <mwild1@gmail.com>
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7 --
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8
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10 local type = type;
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11 local tonumber = tonumber;
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12 local setmetatable = setmetatable;
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13 local error = error;
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14 local tostring = tostring;
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15 local print = print;
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16
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17 local xor_map = {[0]=0;[1]=1;[2]=2;[3]=3;[4]=4;[5]=5;[6]=6;[7]=7;[8]=8;[9]=9;[10]=10;[11]=11;[12]=12;[13]=13;[14]=14;[15]=15;[16]=1;[17]=0;[18]=3;[19]=2;[20]=5;[21]=4;[22]=7;[23]=6;[24]=9;[25]=8;[26]=11;[27]=10;[28]=13;[29]=12;[30]=15;[31]=14;[32]=2;[33]=3;[34]=0;[35]=1;[36]=6;[37]=7;[38]=4;[39]=5;[40]=10;[41]=11;[42]=8;[43]=9;[44]=14;[45]=15;[46]=12;[47]=13;[48]=3;[49]=2;[50]=1;[51]=0;[52]=7;[53]=6;[54]=5;[55]=4;[56]=11;[57]=10;[58]=9;[59]=8;[60]=15;[61]=14;[62]=13;[63]=12;[64]=4;[65]=5;[66]=6;[67]=7;[68]=0;[69]=1;[70]=2;[71]=3;[72]=12;[73]=13;[74]=14;[75]=15;[76]=8;[77]=9;[78]=10;[79]=11;[80]=5;[81]=4;[82]=7;[83]=6;[84]=1;[85]=0;[86]=3;[87]=2;[88]=13;[89]=12;[90]=15;[91]=14;[92]=9;[93]=8;[94]=11;[95]=10;[96]=6;[97]=7;[98]=4;[99]=5;[100]=2;[101]=3;[102]=0;[103]=1;[104]=14;[105]=15;[106]=12;[107]=13;[108]=10;[109]=11;[110]=8;[111]=9;[112]=7;[113]=6;[114]=5;[115]=4;[116]=3;[117]=2;[118]=1;[119]=0;[120]=15;[121]=14;[122]=13;[123]=12;[124]=11;[125]=10;[126]=9;[127]=8;[128]=8;[129]=9;[130]=10;[131]=11;[132]=12;[133]=13;[134]=14;[135]=15;[136]=0;[137]=1;[138]=2;[139]=3;[140]=4;[141]=5;[142]=6;[143]=7;[144]=9;[145]=8;[146]=11;[147]=10;[148]=13;[149]=12;[150]=15;[151]=14;[152]=1;[153]=0;[154]=3;[155]=2;[156]=5;[157]=4;[158]=7;[159]=6;[160]=10;[161]=11;[162]=8;[163]=9;[164]=14;[165]=15;[166]=12;[167]=13;[168]=2;[169]=3;[170]=0;[171]=1;[172]=6;[173]=7;[174]=4;[175]=5;[176]=11;[177]=10;[178]=9;[179]=8;[180]=15;[181]=14;[182]=13;[183]=12;[184]=3;[185]=2;[186]=1;[187]=0;[188]=7;[189]=6;[190]=5;[191]=4;[192]=12;[193]=13;[194]=14;[195]=15;[196]=8;[197]=9;[198]=10;[199]=11;[200]=4;[201]=5;[202]=6;[203]=7;[204]=0;[205]=1;[206]=2;[207]=3;[208]=13;[209]=12;[210]=15;[211]=14;[212]=9;[213]=8;[214]=11;[215]=10;[216]=5;[217]=4;[218]=7;[219]=6;[220]=1;[221]=0;[222]=3;[223]=2;[224]=14;[225]=15;[226]=12;[227]=13;[228]=10;[229]=11;[230]=8;[231]=9;[232]=6;[233]=7;[234]=4;[235]=5;[236]=2;[237]=3;[238]=0;[239]=1;[240]=15;[241]=14;[242]=13;[243]=12;[244]=11;[245]=10;[246]=9;[247]=8;[248]=7;[249]=6;[250]=5;[251]=4;[252]=3;[253]=2;[254]=1;[255]=0;};
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18 local or_map = {[0]=0;[1]=1;[2]=2;[3]=3;[4]=4;[5]=5;[6]=6;[7]=7;[8]=8;[9]=9;[10]=10;[11]=11;[12]=12;[13]=13;[14]=14;[15]=15;[16]=1;[17]=1;[18]=3;[19]=3;[20]=5;[21]=5;[22]=7;[23]=7;[24]=9;[25]=9;[26]=11;[27]=11;[28]=13;[29]=13;[30]=15;[31]=15;[32]=2;[33]=3;[34]=2;[35]=3;[36]=6;[37]=7;[38]=6;[39]=7;[40]=10;[41]=11;[42]=10;[43]=11;[44]=14;[45]=15;[46]=14;[47]=15;[48]=3;[49]=3;[50]=3;[51]=3;[52]=7;[53]=7;[54]=7;[55]=7;[56]=11;[57]=11;[58]=11;[59]=11;[60]=15;[61]=15;[62]=15;[63]=15;[64]=4;[65]=5;[66]=6;[67]=7;[68]=4;[69]=5;[70]=6;[71]=7;[72]=12;[73]=13;[74]=14;[75]=15;[76]=12;[77]=13;[78]=14;[79]=15;[80]=5;[81]=5;[82]=7;[83]=7;[84]=5;[85]=5;[86]=7;[87]=7;[88]=13;[89]=13;[90]=15;[91]=15;[92]=13;[93]=13;[94]=15;[95]=15;[96]=6;[97]=7;[98]=6;[99]=7;[100]=6;[101]=7;[102]=6;[103]=7;[104]=14;[105]=15;[106]=14;[107]=15;[108]=14;[109]=15;[110]=14;[111]=15;[112]=7;[113]=7;[114]=7;[115]=7;[116]=7;[117]=7;[118]=7;[119]=7;[120]=15;[121]=15;[122]=15;[123]=15;[124]=15;[125]=15;[126]=15;[127]=15;[128]=8;[129]=9;[130]=10;[131]=11;[132]=12;[133]=13;[134]=14;[135]=15;[136]=8;[137]=9;[138]=10;[139]=11;[140]=12;[141]=13;[142]=14;[143]=15;[144]=9;[145]=9;[146]=11;[147]=11;[148]=13;[149]=13;[150]=15;[151]=15;[152]=9;[153]=9;[154]=11;[155]=11;[156]=13;[157]=13;[158]=15;[159]=15;[160]=10;[161]=11;[162]=10;[163]=11;[164]=14;[165]=15;[166]=14;[167]=15;[168]=10;[169]=11;[170]=10;[171]=11;[172]=14;[173]=15;[174]=14;[175]=15;[176]=11;[177]=11;[178]=11;[179]=11;[180]=15;[181]=15;[182]=15;[183]=15;[184]=11;[185]=11;[186]=11;[187]=11;[188]=15;[189]=15;[190]=15;[191]=15;[192]=12;[193]=13;[194]=14;[195]=15;[196]=12;[197]=13;[198]=14;[199]=15;[200]=12;[201]=13;[202]=14;[203]=15;[204]=12;[205]=13;[206]=14;[207]=15;[208]=13;[209]=13;[210]=15;[211]=15;[212]=13;[213]=13;[214]=15;[215]=15;[216]=13;[217]=13;[218]=15;[219]=15;[220]=13;[221]=13;[222]=15;[223]=15;[224]=14;[225]=15;[226]=14;[227]=15;[228]=14;[229]=15;[230]=14;[231]=15;[232]=14;[233]=15;[234]=14;[235]=15;[236]=14;[237]=15;[238]=14;[239]=15;[240]=15;[241]=15;[242]=15;[243]=15;[244]=15;[245]=15;[246]=15;[247]=15;[248]=15;[249]=15;[250]=15;[251]=15;[252]=15;[253]=15;[254]=15;[255]=15;};
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19 local and_map = {[0]=0;[1]=0;[2]=0;[3]=0;[4]=0;[5]=0;[6]=0;[7]=0;[8]=0;[9]=0;[10]=0;[11]=0;[12]=0;[13]=0;[14]=0;[15]=0;[16]=0;[17]=1;[18]=0;[19]=1;[20]=0;[21]=1;[22]=0;[23]=1;[24]=0;[25]=1;[26]=0;[27]=1;[28]=0;[29]=1;[30]=0;[31]=1;[32]=0;[33]=0;[34]=2;[35]=2;[36]=0;[37]=0;[38]=2;[39]=2;[40]=0;[41]=0;[42]=2;[43]=2;[44]=0;[45]=0;[46]=2;[47]=2;[48]=0;[49]=1;[50]=2;[51]=3;[52]=0;[53]=1;[54]=2;[55]=3;[56]=0;[57]=1;[58]=2;[59]=3;[60]=0;[61]=1;[62]=2;[63]=3;[64]=0;[65]=0;[66]=0;[67]=0;[68]=4;[69]=4;[70]=4;[71]=4;[72]=0;[73]=0;[74]=0;[75]=0;[76]=4;[77]=4;[78]=4;[79]=4;[80]=0;[81]=1;[82]=0;[83]=1;[84]=4;[85]=5;[86]=4;[87]=5;[88]=0;[89]=1;[90]=0;[91]=1;[92]=4;[93]=5;[94]=4;[95]=5;[96]=0;[97]=0;[98]=2;[99]=2;[100]=4;[101]=4;[102]=6;[103]=6;[104]=0;[105]=0;[106]=2;[107]=2;[108]=4;[109]=4;[110]=6;[111]=6;[112]=0;[113]=1;[114]=2;[115]=3;[116]=4;[117]=5;[118]=6;[119]=7;[120]=0;[121]=1;[122]=2;[123]=3;[124]=4;[125]=5;[126]=6;[127]=7;[128]=0;[129]=0;[130]=0;[131]=0;[132]=0;[133]=0;[134]=0;[135]=0;[136]=8;[137]=8;[138]=8;[139]=8;[140]=8;[141]=8;[142]=8;[143]=8;[144]=0;[145]=1;[146]=0;[147]=1;[148]=0;[149]=1;[150]=0;[151]=1;[152]=8;[153]=9;[154]=8;[155]=9;[156]=8;[157]=9;[158]=8;[159]=9;[160]=0;[161]=0;[162]=2;[163]=2;[164]=0;[165]=0;[166]=2;[167]=2;[168]=8;[169]=8;[170]=10;[171]=10;[172]=8;[173]=8;[174]=10;[175]=10;[176]=0;[177]=1;[178]=2;[179]=3;[180]=0;[181]=1;[182]=2;[183]=3;[184]=8;[185]=9;[186]=10;[187]=11;[188]=8;[189]=9;[190]=10;[191]=11;[192]=0;[193]=0;[194]=0;[195]=0;[196]=4;[197]=4;[198]=4;[199]=4;[200]=8;[201]=8;[202]=8;[203]=8;[204]=12;[205]=12;[206]=12;[207]=12;[208]=0;[209]=1;[210]=0;[211]=1;[212]=4;[213]=5;[214]=4;[215]=5;[216]=8;[217]=9;[218]=8;[219]=9;[220]=12;[221]=13;[222]=12;[223]=13;[224]=0;[225]=0;[226]=2;[227]=2;[228]=4;[229]=4;[230]=6;[231]=6;[232]=8;[233]=8;[234]=10;[235]=10;[236]=12;[237]=12;[238]=14;[239]=14;[240]=0;[241]=1;[242]=2;[243]=3;[244]=4;[245]=5;[246]=6;[247]=7;[248]=8;[249]=9;[250]=10;[251]=11;[252]=12;[253]=13;[254]=14;[255]=15;}
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20
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21 local not_map = {[0]=15;[1]=14;[2]=13;[3]=12;[4]=11;[5]=10;[6]=9;[7]=8;[8]=7;[9]=6;[10]=5;[11]=4;[12]=3;[13]=2;[14]=1;[15]=0;};
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22 local rshift1_map = {[0]=0;[1]=0;[2]=1;[3]=1;[4]=2;[5]=2;[6]=3;[7]=3;[8]=4;[9]=4;[10]=5;[11]=5;[12]=6;[13]=6;[14]=7;[15]=7;};
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23 local rshift1carry_map = {[0]=0;[1]=8;[2]=0;[3]=8;[4]=0;[5]=8;[6]=0;[7]=8;[8]=0;[9]=8;[10]=0;[11]=8;[12]=0;[13]=8;[14]=0;[15]=8;};
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24 local lshift1_map = {[0]=0;[1]=2;[2]=4;[3]=6;[4]=8;[5]=10;[6]=12;[7]=14;[8]=0;[9]=2;[10]=4;[11]=6;[12]=8;[13]=10;[14]=12;[15]=14;};
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25 local lshift1carry_map = {[0]=0;[1]=0;[2]=0;[3]=0;[4]=0;[5]=0;[6]=0;[7]=0;[8]=1;[9]=1;[10]=1;[11]=1;[12]=1;[13]=1;[14]=1;[15]=1;};
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26 local arshift1carry_map = {[0]=0;[1]=0;[2]=0;[3]=0;[4]=0;[5]=0;[6]=0;[7]=0;[8]=8;[9]=8;[10]=8;[11]=8;[12]=8;[13]=8;[14]=8;[15]=8;};
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27
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28 module "bit"
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29
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30 local bit_mt = {__tostring = function(t) return ("%x%x%x%x%x%x%x%x"):format(t[1],t[2],t[3],t[4],t[5],t[6],t[7],t[8]); end};
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31 local function do_bop(a, b, op)
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32 return setmetatable({
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33 op[a[1]*16+b[1]];
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34 op[a[2]*16+b[2]];
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35 op[a[3]*16+b[3]];
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36 op[a[4]*16+b[4]];
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37 op[a[5]*16+b[5]];
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38 op[a[6]*16+b[6]];
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39 op[a[7]*16+b[7]];
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40 op[a[8]*16+b[8]];
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41 }, bit_mt);
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42 end
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43 local function do_uop(a, op)
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44 return setmetatable({
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45 op[a[1]];
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46 op[a[2]];
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47 op[a[3]];
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48 op[a[4]];
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49 op[a[5]];
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50 op[a[6]];
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51 op[a[7]];
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52 op[a[8]];
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53 }, bit_mt);
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54 end
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55
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56 function bxor(a, b) return do_bop(a, b, xor_map); end
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57 function bor(a, b) return do_bop(a, b, or_map); end
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58 function band(a, b) return do_bop(a, b, and_map); end
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59
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60 function bnot(a) return do_uop(a, not_map); end
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61 local function _rshift1(t)
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62 local carry = 0;
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63 for i=1,8 do
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64 local t_i = rshift1_map[t[i]] + carry;
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65 carry = rshift1carry_map[t[i]];
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66 t[i] = t_i;
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67 end
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68 end
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69 function rshift(a, i)
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70 local t = {a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8]};
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71 for _ = 1, i do _rshift1(t); end
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72 return setmetatable(t, bit_mt);
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73 end
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74 local function _arshift1(t)
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75 local carry = arshift1carry_map[t[1]];
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76 for i=1,8 do
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77 local t_i = rshift1_map[t[i]] + carry;
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78 carry = rshift1carry_map[t[i]];
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79 t[i] = t_i;
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80 end
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81 end
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82 function arshift(a, i)
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83 local t = {a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8]};
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84 for _ = 1, i do _arshift1(t); end
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85 return setmetatable(t, bit_mt);
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86 end
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87 local function _lshift1(t)
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88 local carry = 0;
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89 for i=8,1,-1 do
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90 local t_i = lshift1_map[t[i]] + carry;
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91 carry = lshift1carry_map[t[i]];
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92 t[i] = t_i;
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93 end
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94 end
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95 function lshift(a, i)
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96 local t = {a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8]};
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97 for _ = 1, i do _lshift1(t); end
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98 return setmetatable(t, bit_mt);
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99 end
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100
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101 local function _cast(a)
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102 if type(a) == "number" then a = ("%x"):format(a);
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103 elseif type(a) == "table" then return a;
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104 elseif type(a) ~= "string" then error("string expected, got "..type(a), 2); end
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105 local t = {0,0,0,0,0,0,0,0};
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106 a = "00000000"..a;
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107 a = a:sub(-8);
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108 for i = 1,8 do
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109 t[i] = tonumber(a:sub(i,i), 16) or error("Number format error", 2);
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110 end
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111 return setmetatable(t, bit_mt);
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112 end
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113
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114 local function wrap1(f)
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115 return function(a, ...)
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116 if type(a) ~= "table" then a = _cast(a); end
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117 a = f(a, ...);
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118 a = tonumber(tostring(a), 16);
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119 if a > 0x7fffffff then a = a - 1 - 0xffffffff; end
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120 return a;
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121 end;
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122 end
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123 local function wrap2(f)
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124 return function(a, b, ...)
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125 if type(a) ~= "table" then a = _cast(a); end
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126 if type(b) ~= "table" then b = _cast(b); end
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127 a = f(a, b, ...);
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128 a = tonumber(tostring(a), 16);
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129 if a > 0x7fffffff then a = a - 1 - 0xffffffff; end
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130 return a;
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131 end;
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132 end
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133
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134 bxor = wrap2(bxor);
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135 bor = wrap2(bor);
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136 band = wrap2(band);
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137 bnot = wrap1(bnot);
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138 lshift = wrap1(lshift);
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139 rshift = wrap1(rshift);
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140 arshift = wrap1(arshift);
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141 cast = wrap1(_cast);
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142
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143 bits = 32;
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144
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145 return _M;