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Improve performance of char specs

This commit is contained in:
Wilson Lin 2020-07-07 21:08:39 +10:00
parent bcbb048762
commit 3ca6ae3d8e
1 changed files with 18 additions and 5 deletions
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23
src/spec/codepoint.rs
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@ -1,51 +1,64 @@
// Official spec defined code points.
// See https://infra.spec.whatwg.org/#code-points for spec.
// Also update gen/tries.json when changing here.
// 0x09 | 0x0a | 0x0c | 0x0d | 0x20.
static IS_WHITESPACE: [bool; 256] = [
false, false, false, false, false, false, false, false, false, true, true, false, true, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false,
];
#[inline(always)]
pub fn is_whitespace(c: u8) -> bool {
// Also update gen/tries.json when changing here.
match c {
0x09 | 0x0a | 0x0c | 0x0d | 0x20 => true,
_ => false,
}
IS_WHITESPACE[c as usize]
}
#[inline(always)]
pub fn is_c0_control(c: u8) -> bool {
// c >= 0 is always true.
c <= 0x1f
}
#[inline(always)]
pub fn is_control(c: u8) -> bool {
is_c0_control(c) || c >= 0x7f && c <= 0x9f
}
#[inline(always)]
pub fn is_digit(c: u8) -> bool {
c >= b'0' && c <= b'9'
}
#[inline(always)]
pub fn is_upper_hex_digit(c: u8) -> bool {
is_digit(c) || c >= b'A' && c <= b'F'
}
#[inline(always)]
pub fn is_lower_hex_digit(c: u8) -> bool {
is_digit(c) || c >= b'a' && c <= b'f'
}
#[inline(always)]
pub fn is_hex_digit(c: u8) -> bool {
is_upper_hex_digit(c) || is_lower_hex_digit(c)
}
#[inline(always)]
pub fn is_upper_alpha(c: u8) -> bool {
c >= b'A' && c <= b'Z'
}
#[inline(always)]
pub fn is_lower_alpha(c: u8) -> bool {
c >= b'a' && c <= b'z'
}
#[inline(always)]
pub fn is_alpha(c: u8) -> bool {
is_upper_alpha(c) || is_lower_alpha(c)
}
#[inline(always)]
pub fn is_alphanumeric(c: u8) -> bool {
is_digit(c) || is_alpha(c)
}