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Code layout fix for bug N 27079

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Thanks to Gluh for suggestion.
This commit is contained in:
unknown 2007-03-29 10:32:38 +05:00
parent 6370f6226f
commit ee0475bf5d
1 changed files with 16 additions and 17 deletions
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31
strings/ctype-uca.c
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@ -6777,25 +6777,24 @@ static void my_uca_scanner_init_ucs2(my_uca_scanner *scanner,
scanner->uca_length= cs->sort_order;
scanner->uca_weight= cs->sort_order_big;
scanner->contractions= cs->contractions;
return;
}
else
{
/*
Sometimes this function is called with
str=NULL and length=0, which should be
considered as an empty string.
The above initialization is unsafe for such cases,
because scanner->send is initialized to (NULL-2), which is 0xFFFFFFFE.
Then we fall into an endless loop in my_uca_scanner_next_ucs2().
/*
Sometimes this function is called with
str=NULL and length=0, which should be
considered as an empty string.
Do special initialization for the case when length=0.
Initialize scanner->sbeg to an address greater than scanner->send.
Next call of my_uca_scanner_next_ucs2() will correctly return with -1.
*/
scanner->sbeg= (uchar*) &nochar[1];
scanner->send= (uchar*) &nochar[0];
}
The above initialization is unsafe for such cases,
because scanner->send is initialized to (NULL-2), which is 0xFFFFFFFE.
Then we fall into an endless loop in my_uca_scanner_next_ucs2().
Do special initialization for the case when length=0.
Initialize scanner->sbeg to an address greater than scanner->send.
Next call of my_uca_scanner_next_ucs2() will correctly return with -1.
*/
scanner->sbeg= (uchar*) &nochar[1];
scanner->send= (uchar*) &nochar[0];
}