Mercurial > mjpegproxy / file comparison
comparison: util/hex.lua
util/hex.lua
- changeset 9
- 7da8b3c95bb1
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| 8:2e4c32c4fb6b | 9:7da8b3c95bb1 |
|---|---|
| 1 local s_char = string.char; | |
| 2 local s_format = string.format; | |
| 3 local s_gsub = string.gsub; | |
| 4 local s_lower = string.lower; | |
| 5 | |
| 6 local char_to_hex = {}; | |
| 7 local hex_to_char = {}; | |
| 8 | |
| 9 do | |
| 10 local char, hex; | |
| 11 for i = 0,255 do | |
| 12 char, hex = s_char(i), s_format("%02x", i); | |
| 13 char_to_hex[char] = hex; | |
| 14 hex_to_char[hex] = char; | |
| 15 end | |
| 16 end | |
| 17 | |
| 18 local function to(s) | |
| 19 return (s_gsub(s, ".", char_to_hex)); | |
| 20 end | |
| 21 | |
| 22 local function from(s) | |
| 23 return (s_gsub(s_lower(s), "%X*(%x%x)%X*", hex_to_char)); | |
| 24 end | |
| 25 | |
| 26 return { to = to, from = from } |
