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annotate util/hex.lua @ 6375:76d8907d5301

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util.hex: Small util lib for converting to/from hex strings
author Matthew Wild <mwild1@gmail.com>
date Tue, 02 Sep 2014 17:56:42 +0100
parents
children 3f4809d01783
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6375
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
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1 local s_char = string.char;
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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2
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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3 local function char_to_hex(c)
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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4 return ("%02x"):format(c:byte())
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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5 end
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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6
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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7 local function hex_to_char(h)
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8 return s_char(tonumber(h, 16));
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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9 end
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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10
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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11 function to(s)
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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12 return s:gsub(".", char_to_hex);
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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13 end
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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14
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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15 function from(s)
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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16 return s:gsub("..", hex_to_char);
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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17 end
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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18
76d8907d5301 util.hex: Small util lib for converting to/from hex strings
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19 return { to = to, from = from }