diff options
Diffstat (limited to 'src/utf16_le.c')
| -rw-r--r-- | src/utf16_le.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/src/utf16_le.c b/src/utf16_le.c index 4b231c6..cdc74b0 100644 --- a/src/utf16_le.c +++ b/src/utf16_le.c @@ -2,7 +2,7 @@ utf16_le.c - Oniguruma (regular expression library) **********************************************************************/ /*- - * Copyright (c) 2002-2018 K.Kosako <sndgk393 AT ybb DOT ne DOT jp> + * Copyright (c) 2002-2019 K.Kosako <sndgk393 AT ybb DOT ne DOT jp> * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -95,7 +95,15 @@ static const int EncLen_UTF16[] = { static int utf16le_code_to_mbclen(OnigCodePoint code) { - return (code > 0xffff ? 4 : 2); + if (code > 0xffff) { + if (code > 0x10ffff) + return ONIGERR_INVALID_CODE_POINT_VALUE; + else + return 4; + } + else { + return 2; + } } static int @@ -110,7 +118,16 @@ is_valid_mbc_string(const UChar* p, const UChar* end) const UChar* end1 = end - 1; while (p < end1) { - p += utf16le_mbc_enc_len(p); + int len = utf16le_mbc_enc_len(p); + if (len == 4) { + if (p + 3 < end && ! UTF16_IS_SURROGATE_SECOND(*(p + 3))) + return FALSE; + } + else + if (UTF16_IS_SURROGATE_SECOND(*(p + 1))) + return FALSE; + + p += len; } if (p != end) @@ -252,7 +269,8 @@ utf16le_left_adjust_char_head(const UChar* start, const UChar* s) s--; } - if (UTF16_IS_SURROGATE_SECOND(*(s+1)) && s > start + 1) + if (UTF16_IS_SURROGATE_SECOND(*(s+1)) && s > start + 1 && + UTF16_IS_SURROGATE_FIRST(*(s-1))) s -= 2; return (UChar* )s; |