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pkstrings: prevent addition from overflowing

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Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>
This commit is contained in:
Maxime “pep” Buquet 2021-11-14 00:20:30 +01:00
parent cc723f7684
commit a82d73122d
Signed by: pep
GPG key ID: DEDA74AEECA9D0F2
1 changed files with 3 additions and 3 deletions
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6
pkstrings/src/lib.rs
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@ -57,14 +57,14 @@ const fn strtohex(chr: &char) -> Option<u8> {
const fn hextostr(hex: u8) -> Option<char> {
Some(match hex {
cap @ 0x80..=0x99 => (('A' as u8) + cap - 0x80) as char,
cap @ 0x80..=0x99 => (('A' as u8) + (cap - 0x80)) as char,
0x9a => '(',
0x9b => ')',
0x9c => ':',
0x9d => ';',
0x9e => '[',
0x9f => ']',
low @ 0xa0..=0xb9 => (('a' as u8) + low - 0xa0) as char,
low @ 0xa0..=0xb9 => (('a' as u8) + (low - 0xa0)) as char,
0xe0 => '\'',
0xe3 => '-',
0xe6 => '?',
@ -79,7 +79,7 @@ const fn hextostr(hex: u8) -> Option<char> {
0xf3 => '/',
0xf4 => ',',
0xf5 => '♀',
num @ 0xf6..=0xff => (('0' as u8) + num - 0xf6) as char,
num @ 0xf6..=0xff => (('0' as u8) + (num - 0xf6)) as char,
0x7f => ' ',
0x50 => '@',
_ => return None,