30 lines
768 B
Rust
30 lines
768 B
Rust
// Name mangling can cope with char-like byte literals.
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#[repr(C)]
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pub struct Parser<const OPEN: u8, const CLOSE: u8> {
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pub buf: *mut u8,
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pub len: usize,
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}
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#[no_mangle]
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pub unsafe extern "C" fn init_parens_parser(p: *mut Parser<b'(', b')'>, buf: *mut u8, len: usize) {
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unsafe {
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*p = Parser { buf, len };
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}
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}
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// The same type as above, because `b'(' == 40 && b')' == 41`. And it happens
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// to mangle to the same C identifier. It doesn't always work out that way!
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#[no_mangle]
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pub unsafe extern "C" fn destroy_parens_parser(p: *mut Parser<40, 41>) {
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// nothing to do
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}
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#[no_mangle]
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pub unsafe extern "C" fn init_braces_parser(p: *mut Parser<b'{', b'}'>, buf: *mut u8, len: usize) {
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unsafe {
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*p = Parser { buf, len };
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}
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}
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