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util.hex: Normalize hex to lowercase and discard non-hex input

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This commit is contained in:
Kim Alvefur 2015-08-26 14:32:20 +02:00
parent 345a2e09f6
commit 4f034c3b7a
1 changed files with 2 additions and 1 deletions
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3
util/hex.lua
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@ -1,6 +1,7 @@
local s_char = string.char;
local s_format = string.format;
local s_gsub = string.gsub;
local s_lower = string.lower;
local char_to_hex = {};
local hex_to_char = {};
@ -19,7 +20,7 @@ local function to(s)
end
local function from(s)
return (s_gsub(s, "..", hex_to_char));
return (s_gsub(s_lower(s), "%X*(%x%x)%X*", hex_to_char));
end
return { to = to, from = from }