1 files changed, 75 insertions, 0 deletions
diff --git a/third_party/rust/bhttp/src/parse.rs b/third_party/rust/bhttp/src/parse.rs
new file mode 100644
index 0000000000..a2b8889808
--- /dev/null
+++ b/third_party/rust/bhttp/src/parse.rs
@@ -0,0 +1,75 @@
+#[cfg(feature = "read-http")]
+use crate::{Error, Res};
+
+pub const HTAB: u8 = 0x09;
+#[cfg(feature = "read-http")]
+pub const NL: u8 = 0x0a;
+#[cfg(feature = "read-http")]
+pub const CR: u8 = 0x0d;
+pub const SP: u8 = 0x20;
+pub const COMMA: u8 = 0x2c;
+#[cfg(feature = "read-http")]
+pub const SLASH: u8 = 0x2f;
+#[cfg(feature = "read-http")]
+pub const COLON: u8 = 0x3a;
+#[cfg(feature = "read-http")]
+pub const SEMICOLON: u8 = 0x3b;
+
+pub fn is_ows(x: u8) -> bool {
+    x == SP || x == HTAB
+}
+
+pub fn trim_ows(v: &[u8]) -> &[u8] {
+    for s in 0..v.len() {
+        if !is_ows(v[s]) {
+            for e in (s..v.len()).rev() {
+                if !is_ows(v[e]) {
+                    return &v[s..=e];
+                }
+            }
+        }
+    }
+    &v[..0]
+}
+
+#[cfg(feature = "read-http")]
+pub fn downcase(n: &mut [u8]) {
+    for i in n {
+        if *i >= 0x41 && *i <= 0x5a {
+            *i += 0x20;
+        }
+    }
+}
+
+pub fn index_of(v: u8, line: &[u8]) -> Option<usize> {
+    for (i, x) in line.iter().enumerate() {
+        if *x == v {
+            return Some(i);
+        }
+    }
+    None
+}
+
+#[cfg(feature = "read-http")]
+pub fn split_at(v: u8, mut line: Vec<u8>) -> Option<(Vec<u8>, Vec<u8>)> {
+    index_of(v, &line).map(|i| {
+        let tail = line.split_off(i + 1);
+        let _ = line.pop();
+        (line, tail)
+    })
+}
+
+#[cfg(feature = "read-http")]
+pub fn read_line(r: &mut impl std::io::BufRead) -> Res<Vec<u8>> {
+    let mut buf = Vec::new();
+    r.read_until(NL, &mut buf)?;
+    let tail = buf.pop();
+    if tail != Some(NL) {
+        return Err(Error::Truncated);
+    }
+    if buf.pop().ok_or(Error::Missing(CR))? == CR {
+        Ok(buf)
+    } else {
+        Err(Error::Missing(CR))
+    }
+}