prosody
3a75472a3b9d
util/hex.lua

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util/hex.lua @ 13531:3a75472a3b9d

doap: Update XEP for mostly editorial changes XEP-0004: Changes <reported> which is not implemented XEP-0030: A note on some implementations not advertising disco#info XEP-0106: Now references PRECIS which we don't have access to XEP-0107: Editorial fixing of a typo XEP-0133: Removal of 'Get User Password' already done in 21a1b9fb08a1, editorial changes XEP-0153: Editorial changes XEP-0198: Editorial changes and clarifications XEP-0223: Updated security considerations XEP-0292: The difference is that the iq syntax implemented in mod_vcard4 is removed. To become compliant, simply unload this module. XEP-0313: Editorial and minor changes XEP-0398: Advanced to Stable, no other changes XEP-0398: Now mentions the implementation method used in mod_vcard_legacy XEP-0402: Changes only affecting clients XEP-0421: Added requirements we already satisfy XEP-0440: Editorial changes XEP-0478: Editorial changes Due to their size, review of changes to XEP-0045 and XEP-0060 has been left for later.
author Kim Alvefur <zash@zash.se>
date Sat, 26 Oct 2024 18:06:49 +0200
parent 12355:a0ff5c438e9d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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76d8907d5301 util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
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1 local s_char = string.char;
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ec566d7cd518 util.hex: Pedantic optimization, 1 table lookup per byte instead of 3 function calls makes it go faster
Kim Alvefur <zash@zash.se>
parents: 6384
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2 local s_format = string.format;
ec566d7cd518 util.hex: Pedantic optimization, 1 table lookup per byte instead of 3 function calls makes it go faster
Kim Alvefur <zash@zash.se>
parents: 6384
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3 local s_gsub = string.gsub;
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442019e955dc util.hex: Normalize hex to lowercase and discard non-hex input
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4 local s_lower = string.lower;
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Kim Alvefur <zash@zash.se>
parents: 6384
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5
ec566d7cd518 util.hex: Pedantic optimization, 1 table lookup per byte instead of 3 function calls makes it go faster
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parents: 6384
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6 local char_to_hex = {};
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Kim Alvefur <zash@zash.se>
parents: 6384
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7 local hex_to_char = {};
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76d8907d5301 util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
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8
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ec566d7cd518 util.hex: Pedantic optimization, 1 table lookup per byte instead of 3 function calls makes it go faster
Kim Alvefur <zash@zash.se>
parents: 6384
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9 do
ec566d7cd518 util.hex: Pedantic optimization, 1 table lookup per byte instead of 3 function calls makes it go faster
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parents: 6384
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10 local char, hex;
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Kim Alvefur <zash@zash.se>
parents: 6384
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11 for i = 0,255 do
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parents: 6384
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12 char, hex = s_char(i), s_format("%02x", i);
ec566d7cd518 util.hex: Pedantic optimization, 1 table lookup per byte instead of 3 function calls makes it go faster
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parents: 6384
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13 char_to_hex[char] = hex;
ec566d7cd518 util.hex: Pedantic optimization, 1 table lookup per byte instead of 3 function calls makes it go faster
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parents: 6384
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14 hex_to_char[hex] = char;
ec566d7cd518 util.hex: Pedantic optimization, 1 table lookup per byte instead of 3 function calls makes it go faster
Kim Alvefur <zash@zash.se>
parents: 6384
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15 end
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76d8907d5301 util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
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16 end
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
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17
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3f4809d01783 util.hex: Use locals!
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parents: 6375
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18 local function to(s)
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parents: 6384
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19 return (s_gsub(s, ".", char_to_hex));
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Matthew Wild <mwild1@gmail.com>
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20 end
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
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21
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parents: 6375
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22 local function from(s)
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23 return (s_gsub(s_lower(s), "%X*(%x%x)%X*", hex_to_char));
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Matthew Wild <mwild1@gmail.com>
parents:
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24 end
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
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25
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parents: 6802
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26 return {
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parents: 6802
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27 encode = to, decode = from;
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parents: 6802
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28 -- COMPAT w/pre-0.12:
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parents: 6802
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29 to = to, from = from;
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Matthew Wild <mwild1@gmail.com>
parents: 6802
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30 };