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47 lines
1.4 KiB
47 lines
1.4 KiB
4 months ago
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use crate::gen::include::HEADER;
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use crate::gen::out::Content;
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pub(super) fn write(out: &mut Content, needed: bool, guard: &str) {
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let ifndef = format!("#ifndef {}", guard);
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let define = format!("#define {}", guard);
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let endif = format!("#endif // {}", guard);
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let mut offset = 0;
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loop {
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let begin = find_line(offset, &ifndef);
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let end = find_line(offset, &endif);
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if let (Some(begin), Some(end)) = (begin, end) {
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if !needed {
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return;
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}
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out.next_section();
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if offset == 0 {
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writeln!(out, "{}", ifndef);
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writeln!(out, "{}", define);
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}
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for line in HEADER[begin + ifndef.len()..end].trim().lines() {
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if line != define && !line.trim_start().starts_with("//") {
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writeln!(out, "{}", line);
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}
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}
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offset = end + endif.len();
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} else if offset == 0 {
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panic!("not found in cxx.h header: {}", guard)
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} else {
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writeln!(out, "{}", endif);
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return;
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}
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}
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}
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fn find_line(mut offset: usize, line: &str) -> Option<usize> {
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loop {
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offset += HEADER[offset..].find(line)?;
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let rest = &HEADER[offset + line.len()..];
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if rest.starts_with('\n') || rest.starts_with('\r') {
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return Some(offset);
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}
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offset += line.len();
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}
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}
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