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pkstrings: Use ranges to reduce match pattern sizes

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Thanks ekleog!

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>
This commit is contained in:
Maxime “pep” Buquet 2020-07-06 01:20:47 +02:00
parent 8c06d00a19
commit cb93e2fae0
1 changed files with 6 additions and 124 deletions
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130
pkstrings/src/lib.rs
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@ -19,64 +19,14 @@ use std::ops::Deref;
const fn strtohex(chr: &char) -> Option<u8> {
Some(match chr {
'A' => 0x80,
'B' => 0x81,
'C' => 0x82,
'D' => 0x83,
'E' => 0x84,
'F' => 0x85,
'G' => 0x86,
'H' => 0x87,
'I' => 0x88,
'J' => 0x89,
'K' => 0x8a,
'L' => 0x8b,
'M' => 0x8c,
'N' => 0x8d,
'O' => 0x8e,
'P' => 0x8f,
'Q' => 0x90,
'R' => 0x91,
'S' => 0x92,
'T' => 0x93,
'U' => 0x94,
'V' => 0x95,
'W' => 0x96,
'X' => 0x97,
'Y' => 0x98,
'Z' => 0x99,
cap @ 'A'..='Z' => 0x80 - ('A' as u8) + (*cap as u8),
'(' => 0x9a,
')' => 0x9b,
':' => 0x9c,
';' => 0x9d,
'[' => 0x9e,
']' => 0x9f,
'a' => 0xa0,
'b' => 0xa1,
'c' => 0xa2,
'd' => 0xa3,
'e' => 0xa4,
'f' => 0xa5,
'g' => 0xa6,
'h' => 0xa7,
'i' => 0xa8,
'j' => 0xa9,
'k' => 0xaa,
'l' => 0xab,
'm' => 0xac,
'n' => 0xad,
'o' => 0xae,
'p' => 0xaf,
'q' => 0xb0,
'r' => 0xb1,
's' => 0xb2,
't' => 0xb3,
'u' => 0xb4,
'v' => 0xb5,
'w' => 0xb6,
'x' => 0xb7,
'y' => 0xb8,
'z' => 0xb9,
low @ 'a'..='z' => 0xa0 - ('a' as u8) + (*low as u8),
'\'' => 0xe0,
'-' => 0xe3,
'?' => 0xe6,
@ -98,16 +48,7 @@ const fn strtohex(chr: &char) -> Option<u8> {
'/' => 0xf3,
',' => 0xf4,
'♀' => 0xf5,
'0' => 0xf6,
'1' => 0xf7,
'2' => 0xf8,
'3' => 0xf9,
'4' => 0xfa,
'5' => 0xfb,
'6' => 0xfc,
'7' => 0xfd,
'8' => 0xfe,
'9' => 0xff,
num @ '0'..='9' => 0xf6 - ('0' as u8) + (*num as u8),
' ' => 0x7f,
'@' => 0x50,
_ => return None,
@ -116,64 +57,14 @@ const fn strtohex(chr: &char) -> Option<u8> {
const fn hextostr(hex: u8) -> Option<char> {
Some(match hex {
0x80 => 'A',
0x81 => 'B',
0x82 => 'C',
0x83 => 'D',
0x84 => 'E',
0x85 => 'F',
0x86 => 'G',
0x87 => 'H',
0x88 => 'I',
0x89 => 'J',
0x8a => 'K',
0x8b => 'L',
0x8c => 'M',
0x8d => 'N',
0x8e => 'O',
0x8f => 'P',
0x90 => 'Q',
0x91 => 'R',
0x92 => 'S',
0x93 => 'T',
0x94 => 'U',
0x95 => 'V',
0x96 => 'W',
0x97 => 'X',
0x98 => 'Y',
0x99 => 'Z',
cap @ 0x80..=0x99 => (('A' as u8) + cap - 0x80) as char,
0x9a => '(',
0x9b => ')',
0x9c => ':',
0x9d => ';',
0x9e => '[',
0x9f => ']',
0xa0 => 'a',
0xa1 => 'b',
0xa2 => 'c',
0xa3 => 'd',
0xa4 => 'e',
0xa5 => 'f',
0xa6 => 'g',
0xa7 => 'h',
0xa8 => 'i',
0xa9 => 'j',
0xaa => 'k',
0xab => 'l',
0xac => 'm',
0xad => 'n',
0xae => 'o',
0xaf => 'p',
0xb0 => 'q',
0xb1 => 'r',
0xb2 => 's',
0xb3 => 't',
0xb4 => 'u',
0xb5 => 'v',
0xb6 => 'w',
0xb7 => 'x',
0xb8 => 'y',
0xb9 => 'z',
low @ 0xa0..=0xb9 => (('a' as u8) + low - 0xa0) as char,
0xe0 => '\'',
0xe3 => '-',
0xe6 => '?',
@ -188,16 +79,7 @@ const fn hextostr(hex: u8) -> Option<char> {
0xf3 => '/',
0xf4 => ',',
0xf5 => '♀',
0xf6 => '0',
0xf7 => '1',
0xf8 => '2',
0xf9 => '3',
0xfa => '4',
0xfb => '5',
0xfc => '6',
0xfd => '7',
0xfe => '8',
0xff => '9',
num @ 0xf6..=0xff => (('0' as u8) + num - 0xf6) as char,
0x7f => ' ',
0x50 => '@',
_ => return None,