mod avx2; mod fallback; mod naive; mod sse2; use std::ptr; use super::buffer::Buffer; static ESCAPE_LUT: [u8; 256] = [ 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 0, 9, 9, 9, 1, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 9, 3, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, ]; const ESCAPED: [&'static str; 4] = [""", "&", "<", ">"]; const ESCAPED_LEN: usize = 4; #[inline] pub fn escape_with(mut writer: F, feed: &str) { unsafe { #[cfg(target_feature = "avx2")] { avx2::escape(&mut writer, feed.as_bytes()); } #[cfg(not(target_feature = "avx2"))] { if is_x86_feature_detected!("avx2") { avx2::escape(&mut writer, feed.as_bytes()); } else if is_x86_feature_detected!("sse2") { sse2::escape(&mut writer, feed.as_bytes()); } else { fallback::escape(&mut writer, feed.as_bytes()); } } } } #[doc(hidden)] pub fn escape_to_buf(feed: &str, buf: &mut Buffer) { escape_with(|e| buf.write_str(e), feed); } #[inline] pub fn escape_to_string(feed: &str, s: &mut String) { unsafe { let mut buf = Buffer::from(ptr::read(s)); escape_to_buf(feed, &mut buf); ptr::write(s, buf.into_string()); } } #[cfg(test)] mod tests { use super::*; fn escape(feed: &str) -> String { let mut buf = Buffer::new(); escape_to_buf(feed, &mut buf); buf.into_string() } #[test] fn noescape() { assert_eq!(escape(""), ""); assert_eq!( escape("abcdefghijklmnopqrstrvwxyz"), "abcdefghijklmnopqrstrvwxyz" ); assert_eq!(escape("!#$%()*+,-.:;=?_^"), "!#$%()*+,-.:;=?_^"); assert_eq!( escape("漢字はエスケープしないはずだよ"), "漢字はエスケープしないはずだよ" ); } #[test] fn escape_short() { assert_eq!(escape("<"), "<"); assert_eq!(escape("\"&<>"), ""&<>"); assert_eq!( escape("{\"title\": \"This is a JSON!\"}"), "{"title": "This is a JSON!"}" ); assert_eq!( escape("

Hello, world

"), "<html><body><h1>Hello, world</h1>\ </body></html>" ); } #[test] #[rustfmt::skip] fn escape_long() { assert_eq!( escape(r###"m{jml&,?6>\2~08g)\=3`,_`$1@0{i5j}.}2ki\^t}k"@p4$~?;!;pn_l8v."ki`%/&^=\[y+qcerr`@3*|?du.\0vd#40.>bcpf\u@m|c<2t7`hk)^?"0u{v%9}4y2hhv?%-f`<;rzwx`7}l(j2b:c\<|z&$x{+k;f`0+w3e0\m.wmdli>94e2hp\$}j0&m(*h$/lwlj#}99r;o.kj@1#}~v+;y~b[~m.eci}&l7fxt`\\{~#k*9z/d{}(.^j}[(,]:<\h]9k2+0*w60/|23~5;/!-h&ci*~e1h~+:1lhh\>y_*>:-\zzv+8uo],,a^k3_,uip]-/.-~\t51a*<{6!<(_|<#o6=\h1*`[2x_?#-/])x};};r@wqx|;/w&jrv~?\`t:^/dug3(g(ener?!t$}h4:57ptnm@71e=t>@o*"$]799r=+)t>co?rvgk%u0c@.9os;#t_*/gqve/t;o<*`~?3.jyx+h)+^cn^j4td|>)~rs)vm#]:"&\fi;54%+z~fhe|w~\q|ui={54[b9tg*?@]g+q!mq]3jg2?eoo"chyat3k#7pq1u=.l]c14twa4tg#5k_""###), r###"m{jml&,?6>\2~08g)\=3`,_`$1@0{i5j}.}2ki\^t}k"@p4$~?;!;pn_l8v."ki`%/&^=\[y+qcerr`@3*|?du.\0vd#40.>bcpf\u@m|c<2t7`hk)^?"0u{v%9}4y2hhv?%-f`<;rzwx`7}l(j2b:c\<|z&$x{+k;f`0+w3e0\m.wmdli>94e2hp\$}j0&m(*h$/lwlj#}99r;o.kj@1#}~v+;y~b[~m.eci}&l7fxt`\\{~#k*9z/d{}(.^j}[(,]:<\h]9k2+0*w60/|23~5;/!-h&ci*~e1h~+:1lhh\>y_*>:-\zzv+8uo],,a^k3_,uip]-/.-~\t51a*<{6!<(_|<#o6=\h1*`[2x_?#-/])x};};r@wqx|;/w&jrv~?\`t:^/dug3(g(ener?!t$}h4:57ptnm@71e=t>@o*"$]799r=+)t>co?rvgk%u0c@.9os;#t_*/gqv<za&~r^]"{t4by2t`<q4bfo^&!so5/~(nxk:7l\;#0w41u~w3i$g|>e/t;o<*`~?3.jyx+h)+^cn^j4td|>)~rs)vm#]:"&\fi;54%+z~fhe|w~\q|ui={54[b9tg*?@]g+q!mq]3jg2?eoo"chyat3k#7pq1u=.l]c14twa4tg#5k_""### ); } #[test] fn random() { const ASCII_CHARS: &'static [u8] = br##"abcdefghijklmnopqrstuvwxyz0123456789-^\@[;:],./\!"#$%&'()~=~|`{+*}<>?_"##; let mut state = 88172645463325252u64; let mut data = Vec::with_capacity(100); let mut buf1 = Buffer::new(); let mut buf2 = Buffer::new(); for len in 0..100 { data.clear(); for _ in 0..len { // xorshift state ^= state << 13; state ^= state >> 7; state ^= state << 17; let idx = state as usize % ASCII_CHARS.len(); data.push(ASCII_CHARS[idx]); } let s = unsafe { std::str::from_utf8_unchecked(&*data) }; buf1.clear(); buf2.clear(); unsafe { escape_to_buf(&*s, &mut buf1); naive::escape( &mut |s| buf2.write_str(s), s.as_ptr(), s.as_ptr(), s.as_ptr().add(s.len()), ); } assert_eq!(buf1.as_str(), buf2.as_str()); } } }