diff options
Diffstat (limited to 'ext/pcre/pcrelib/pcre_valid_utf8.c')
| -rw-r--r-- | ext/pcre/pcrelib/pcre_valid_utf8.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/ext/pcre/pcrelib/pcre_valid_utf8.c b/ext/pcre/pcrelib/pcre_valid_utf8.c index f49832dc5b..a415927568 100644 --- a/ext/pcre/pcrelib/pcre_valid_utf8.c +++ b/ext/pcre/pcrelib/pcre_valid_utf8.c @@ -42,7 +42,9 @@ POSSIBILITY OF SUCH DAMAGE. strings. */ +#ifdef HAVE_CONFIG_H #include "config.h" +#endif #include "pcre_internal.h" @@ -90,6 +92,7 @@ PCRE_UTF8_ERR18 Overlong 5-byte sequence (won't ever occur) PCRE_UTF8_ERR19 Overlong 6-byte sequence (won't ever occur) PCRE_UTF8_ERR20 Isolated 0x80 byte (not within UTF-8 character) PCRE_UTF8_ERR21 Byte with the illegal value 0xfe or 0xff +PCRE_UTF8_ERR22 Non-character Arguments: string points to the string @@ -114,7 +117,8 @@ if (length < 0) for (p = string; length-- > 0; p++) { - register int ab, c, d; + register pcre_uchar ab, c, d; + pcre_uint32 v = 0; c = *p; if (c < 128) continue; /* ASCII character */ @@ -183,6 +187,7 @@ for (p = string; length-- > 0; p++) *erroroffset = (int)(p - string) - 2; return PCRE_UTF8_ERR14; } + v = ((c & 0x0f) << 12) | ((d & 0x3f) << 6) | (*p & 0x3f); break; /* 4-byte character. Check 3rd and 4th bytes for 0x80. Then check first 2 @@ -210,6 +215,7 @@ for (p = string; length-- > 0; p++) *erroroffset = (int)(p - string) - 3; return PCRE_UTF8_ERR13; } + v = ((c & 0x07) << 18) | ((d & 0x3f) << 12) | ((p[-1] & 0x3f) << 6) | (*p & 0x3f); break; /* 5-byte and 6-byte characters are not allowed by RFC 3629, and will be @@ -284,11 +290,20 @@ for (p = string; length-- > 0; p++) *erroroffset = (int)(p - string) - ab; return (ab == 4)? PCRE_UTF8_ERR11 : PCRE_UTF8_ERR12; } + + /* Reject non-characters. The pointer p is currently at the last byte of the + character. */ + if ((v & 0xfffeu) == 0xfffeu || (v >= 0xfdd0 && v <= 0xfdef)) + { + *erroroffset = (int)(p - string) - ab; + return PCRE_UTF8_ERR22; + } } -#else /* SUPPORT_UTF */ +#else /* Not SUPPORT_UTF */ (void)(string); /* Keep picky compilers happy */ (void)(length); +(void)(erroroffset); #endif return PCRE_UTF8_ERR0; /* This indicates success */ |