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| author | Ben Boeckel <ben.boeckel@kitware.com> | 2023-06-06 16:50:22 -0400 |
|---|---|---|
| committer | Jason Merrill <jason@redhat.com> | 2023-06-19 17:20:41 -0400 |
| commit | c1dbaa6656acc62c586dad1018f06113cde2d8a4 (patch) | |
| tree | 4db4cee8dc719076f43078ea557844acbb281bb7 /libcpp | |
| parent | dbcbc858c71f69da76d1f36d6bb5d72f2db11eda (diff) | |
| download | gcc-c1dbaa6656acc62c586dad1018f06113cde2d8a4.zip gcc-c1dbaa6656acc62c586dad1018f06113cde2d8a4.tar.gz gcc-c1dbaa6656acc62c586dad1018f06113cde2d8a4.tar.bz2 | |
libcpp: reject codepoints above 0x10FFFF
Unicode does not support such values because they are unrepresentable in
UTF-16.
libcpp/
* charset.cc: Reject encodings of codepoints above 0x10FFFF.
UTF-16 does not support such codepoints and therefore all
Unicode rejects such values.
Signed-off-by: Ben Boeckel <ben.boeckel@kitware.com>
Diffstat (limited to 'libcpp')
| -rw-r--r-- | libcpp/charset.cc | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libcpp/charset.cc b/libcpp/charset.cc index d7f323b..d4f573e 100644 --- a/libcpp/charset.cc +++ b/libcpp/charset.cc @@ -1886,6 +1886,13 @@ cpp_valid_utf8_p (const char *buffer, size_t num_bytes) int err = one_utf8_to_cppchar (&iter, &bytesleft, &cp); if (err) return false; + + /* Additionally, Unicode declares that all codepoints above 0010FFFF are + invalid because they cannot be represented in UTF-16. + + Reject such values.*/ + if (cp >= UCS_LIMIT) + return false; } /* No problems encountered. */ return true; |