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Add a fast path for ASCII case conversions

This commit is contained in:
Adrian Wielgosik 2020-07-01 23:17:14 +02:00 committed by Mike Welsh
parent 1705015b48
commit 301d696670
1 changed files with 6 additions and 0 deletions
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6
core/src/string_utils.rs
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@ -3,6 +3,9 @@
/// Maps a char to its lowercase variant according to the Flash Player. /// Maps a char to its lowercase variant according to the Flash Player.
/// Note that this mapping is different that Rust's `to_lowercase`. /// Note that this mapping is different that Rust's `to_lowercase`.
pub fn swf_char_to_lowercase(c: char) -> char { pub fn swf_char_to_lowercase(c: char) -> char {
if c.is_ascii() {
return c.to_ascii_lowercase();
}
let code_pt = u32::from(c); let code_pt = u32::from(c);
if code_pt < 65536 { if code_pt < 65536 {
let code_pt = code_pt as u16; let code_pt = code_pt as u16;
@ -18,6 +21,9 @@ pub fn swf_char_to_lowercase(c: char) -> char {
/// Maps a char to its uppercase variant according to the Flash Player. /// Maps a char to its uppercase variant according to the Flash Player.
/// Note that this mapping is different that Rust's `to_uppercase`. /// Note that this mapping is different that Rust's `to_uppercase`.
pub fn swf_char_to_uppercase(c: char) -> char { pub fn swf_char_to_uppercase(c: char) -> char {
if c.is_ascii() {
return c.to_ascii_uppercase();
}
let code_pt = u32::from(c); let code_pt = u32::from(c);
if code_pt < 65536 { if code_pt < 65536 {
let code_pt = code_pt as u16; let code_pt = code_pt as u16;