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commit: reject non-characters

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Unicode clause D14 defines all characters U+nFFFE and U+nFFFF (where
0 <= n <= 10h) as well as the range U+FDD0..U+FDEF as non-characters,
reserved for internal use only.  Disallow these characters in commit
messages as they are normally not recommended for interchange.

Signed-off-by: Peter Krefting <peter@softwolves.pp.se>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Peter Krefting
2013-07-09 12:16:33 +01:00
committed by Junio C Hamano
parent e82bd6cc70
commit 81050ac604
2 changed files with 23 additions and 2 deletions
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7
commit.c
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@@ -1305,8 +1305,11 @@ static int find_invalid_utf8(const char *buf, int len)
/* Surrogates are only for UTF-16 and cannot be encoded in UTF-8. */
if ((codepoint & 0x1ff800) == 0xd800)
return bad_offset;
/* U+FFFE and U+FFFF are guaranteed non-characters. */
if ((codepoint & 0x1ffffe) == 0xfffe)
/* U+xxFFFE and U+xxFFFF are guaranteed non-characters. */
if ((codepoint & 0xffffe) == 0xfffe)
return bad_offset;
/* So are anything in the range U+FDD0..U+FDEF. */
if (codepoint >= 0xfdd0 && codepoint <= 0xfdef)
return bad_offset;
}
return -1;