Function strip_c

codegraph-kernel/src/cfnptr.rs:210–267

Port of `stripCStyle(src, /*allowSingleQuoteStrings*/ false)`: `/* */` and `//` comments blanked to spaces (newlines preserved), `"` and backtick string interiors skipped verbatim (backtick spans lines — the JS helper treats it as a template literal even for C), `'` NOT special. Blanking is per UTF-16 CODE UNIT (one space per BMP char, two per astral char), so the result equals the JS stripper's

(src: &[u8])

/// see, and the strip differential oracle pins byte equality directly.
/// (Comment boundaries — `/*`, `*/`, `//`, quotes, `\n` — are all ASCII, so
/// the state machine's byte positions always land on char boundaries.)
pub fn strip_c(src: &[u8]) -> Vec<u8> {
    let n = src.len();
    let mut out = Vec::with_capacity(n);
    let mut copied = 0usize; // src[..copied] already emitted
    let mut i = 0;
    {
        let mut blank_to = |out: &mut Vec<u8>, start: usize, end: usize| {
            out.extend_from_slice(&src[copied..start]);
            emit_blank(out, &src[start..end]);
            copied = end;
        };
        while i < n {
            let c = src[i];
            let c2 = if i + 1 < n { src[i + 1] } else { 0 };
            if c == b'/' && c2 == b'*' {
                let start = i;
                i += 2;
                while i < n && !(src[i] == b'*' && i + 1 < n && src[i + 1] == b'/') {
                    i += 1;
                }
                if i < n {
                    i += 2;
                }
                blank_to(&mut out, start, i.min(n));
                continue;
            }
            if c == b'/' && c2 == b'/' {
                let start = i;
                while i < n && src[i] != b'\n' {
                    i += 1;
                }
                blank_to(&mut out, start, i);
                continue;
            }
            if c == b'"' || c == b'`' {
                let quote = c;
                i += 1;
                while i < n && src[i] != quote {
                    if src[i] == b'\\' && i + 1 < n {
                        i += 2;
                        continue;
                    }
                    if quote != b'`' && src[i] == b'\n' {
                        break;
                    }
                    i += 1;
                }
                if i < n && src[i] == quote {
                    i += 1;
                }
                continue;
            }
            i += 1;
        }
    }
    out.extend_from_slice(&src[copied..]);
    out