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util/hex.lua @ 13146:771eb453e03a
util.sqlite3: Deduplicate query methods
There were 3 very similar methods:
- :execute()
- :execute_query()
- :execute_update()
The first one returns the prepared statement and is mainly used
internally in the library for CREATE statements.
The later two only really differ in how the results are returned.
Those two are one main method and one small one that only picks out the
iterator.
author | Kim Alvefur <zash@zash.se> |
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date | Sat, 10 Jun 2023 22:02:15 +0200 |
parent | 12355:a0ff5c438e9d |
rev | line source |
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6375
76d8907d5301
util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
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1 local s_char = string.char; |
6545
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
diff
changeset
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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
diff
changeset
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3 local s_gsub = string.gsub; |
6802
442019e955dc
util.hex: Normalize hex to lowercase and discard non-hex input
Kim Alvefur <zash@zash.se>
parents:
6545
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changeset
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4 local s_lower = string.lower; |
6545
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
diff
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5 |
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
diff
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6 local char_to_hex = {}; |
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
diff
changeset
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7 local hex_to_char = {}; |
6375
76d8907d5301
util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
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8 |
6545
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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
diff
changeset
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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
Kim Alvefur <zash@zash.se>
parents:
6384
diff
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10 local char, hex; |
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
diff
changeset
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11 for i = 0,255 do |
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
diff
changeset
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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
Kim Alvefur <zash@zash.se>
parents:
6384
diff
changeset
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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
Kim Alvefur <zash@zash.se>
parents:
6384
diff
changeset
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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
diff
changeset
|
15 end |
6375
76d8907d5301
util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
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16 end |
76d8907d5301
util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
17 |
6384 | 18 local function to(s) |
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Kim Alvefur <zash@zash.se>
parents:
6384
diff
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19 return (s_gsub(s, ".", char_to_hex)); |
6375
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util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
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20 end |
76d8907d5301
util.hex: Small util lib for converting to/from hex strings
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
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21 |
6384 | 22 local function from(s) |
6802
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util.hex: Normalize hex to lowercase and discard non-hex input
Kim Alvefur <zash@zash.se>
parents:
6545
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23 return (s_gsub(s_lower(s), "%X*(%x%x)%X*", hex_to_char)); |
6375
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util.hex: Small util lib for converting to/from hex strings
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:
diff
changeset
|
25 |
12355
a0ff5c438e9d
util.hex: Deprecate to/from in favour of encode/decode, for consistency!
Matthew Wild <mwild1@gmail.com>
parents:
6802
diff
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26 return { |
a0ff5c438e9d
util.hex: Deprecate to/from in favour of encode/decode, for consistency!
Matthew Wild <mwild1@gmail.com>
parents:
6802
diff
changeset
|
27 encode = to, decode = from; |
a0ff5c438e9d
util.hex: Deprecate to/from in favour of encode/decode, for consistency!
Matthew Wild <mwild1@gmail.com>
parents:
6802
diff
changeset
|
28 -- COMPAT w/pre-0.12: |
a0ff5c438e9d
util.hex: Deprecate to/from in favour of encode/decode, for consistency!
Matthew Wild <mwild1@gmail.com>
parents:
6802
diff
changeset
|
29 to = to, from = from; |
a0ff5c438e9d
util.hex: Deprecate to/from in favour of encode/decode, for consistency!
Matthew Wild <mwild1@gmail.com>
parents:
6802
diff
changeset
|
30 }; |