/[pcre]/code/trunk/pcre_valid_utf8.c
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revision 569 by ph10, Sun Nov 7 16:14:50 2010 UTC revision 579 by ph10, Wed Nov 24 17:39:25 2010 UTC
# Line 72  Arguments: Line 72  Arguments:
72    
73  Returns:       < 0    if the string is a valid UTF-8 string  Returns:       < 0    if the string is a valid UTF-8 string
74                 >= 0   otherwise; the value is the offset of the bad byte                 >= 0   otherwise; the value is the offset of the bad byte
75    
76  Bad bytes can be:  Bad bytes can be:
77    
78    . An isolated byte whose most significant bits are 0x80, because this    . An isolated byte whose most significant bits are 0x80, because this
79      can only correctly appear within a UTF-8 character;      can only correctly appear within a UTF-8 character;
80    
81    . A byte whose most significant bits are 0xc0, but whose other bits indicate    . A byte whose most significant bits are 0xc0, but whose other bits indicate
82      that there are more than 3 additional bytes (i.e. an RFC 2279 starting      that there are more than 3 additional bytes (i.e. an RFC 2279 starting
83      byte, which is no longer valid under RFC 3629);      byte, which is no longer valid under RFC 3629);
84    
85    .    .
86    
87  The returned offset may also be equal to the length of the string; this means  The returned offset may also be equal to the length of the string; this means
88  that one or more bytes is missing from the final UTF-8 character.  that one or more bytes is missing from the final UTF-8 character.
89  */  */
90    
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