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Fix the initial-prefix optimization for the REGEXP extension such that it

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works even if the prefix contains characters that require a 3-byte UTF8
encoding.  This should fix the problem reported by
[forum:/forumpost/96692f8ba5|forum post 96692f8ba5].

FossilOrigin-Name: c94595a6e15490b432f099fefbe2429fa19287f7bdc86332cba0fd1e08f65bd6
This commit is contained in:
drh
2022-07-03 14:25:47 +00:00
parent a57ac0a827
commit f28727f61e
4 changed files with 31 additions and 9 deletions
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2
ext/misc/regexp.c
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@ -685,7 +685,7 @@ static const char *re_compile(ReCompiled **ppRe, const char *zIn, int noCase){
pRe->zInit[j++] = (unsigned char)(0xc0 | (x>>6));
pRe->zInit[j++] = 0x80 | (x&0x3f);
}else if( x<=0xffff ){
pRe->zInit[j++] = (unsigned char)(0xd0 | (x>>12));
pRe->zInit[j++] = (unsigned char)(0xe0 | (x>>12));
pRe->zInit[j++] = 0x80 | ((x>>6)&0x3f);
pRe->zInit[j++] = 0x80 | (x&0x3f);
}else{