Add utf-8 validation for input source #2374
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tamaroning
commented
Jul 4, 2023
Comment on lines
221
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| { | ||
| uint8_t input = next_byte (); | ||
| uint32_t input = next_byte (); | ||
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| if ((int8_t) input == EOF) | ||
| if ((int32_t) input == EOF) | ||
| return Codepoint::eof (); |
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Changed input from uint8_t to uint32_t so as to differentiate 0xff and EOF.
tamaroning
commented
Jul 4, 2023
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| { | ||
| if (offs >= buffer.size ()) | ||
| return EOF; | ||
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| return buffer.at (offs++); | ||
| return (uint8_t) buffer.at (offs++); | ||
| } |
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Added casting to prevend bytes whose MSB is 1 from being sign-extended.
Without casting , for example, 0xfe becomes 0xfffffffe.
tamaroning
commented
Jul 4, 2023
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| // { dg-excess-errors "stream did not contain valid UTF-8" } | ||
| � |
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Contains a 0xff in line 2.
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Not ÿ (U+FF) as we see.
gcc/rust/ChangeLog: * lex/rust-lex.cc (Lexer::input_source_is_valid_utf8): New method of `Lexer`. * lex/rust-lex.h: Likewise. * rust-session-manager.cc (Session::compile_crate): Add error. gcc/testsuite/ChangeLog: * rust/compile/broken_utf8.rs: New test. Signed-off-by: Raiki Tamura <[email protected]>
philberty
requested review from
CohenArthur,
P-E-P and
philberty
and removed request for
CohenArthur and
philberty
|
The only thing i might say is it would be nice to have these constants named in some way but utf8 stuff is so specific i dont think that really helps. |
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Addresses #2287