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Fix a bug in the spellfix extension causing it to compute suboptimal answers.

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The problem was introduced by check-in [afd6fbc01052ccfc9].

FossilOrigin-Name: 3bf28fd9a70ebefc464dceda124d6ed342dd83f71eeeb0568f79e34e731a073e
This commit is contained in:
drh
2018-03-30 16:34:04 +00:00
parent 9f95e48d94
commit 58bd03320d
3 changed files with 13 additions and 9 deletions
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8
ext/misc/spellfix.c
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@ -835,6 +835,7 @@ static int utf8Len(unsigned char c, int N){
** the given string.
*/
static int matchTo(EditDist3Cost *p, const char *z, int n){
assert( n>0 );
if( p->a[p->nFrom]!=z[0] ) return 0;
if( p->nTo>n ) return 0;
if( strncmp(p->a+p->nFrom, z, p->nTo)!=0 ) return 0;
@ -847,8 +848,10 @@ static int matchTo(EditDist3Cost *p, const char *z, int n){
*/
static int matchFrom(EditDist3Cost *p, const char *z, int n){
assert( p->nFrom<=n );
if( p->a[0]!=z[0] ) return 0;
if( strncmp(p->a, z, p->nFrom)!=0 ) return 0;
if( p->nFrom ){
if( p->a[0]!=z[0] ) return 0;
if( strncmp(p->a, z, p->nFrom)!=0 ) return 0;
}
return 1;
}
@ -864,6 +867,7 @@ static int matchFromTo(
){
int b1 = pStr->a[n1].nByte;
if( b1>n2 ) return 0;
assert( b1>0 );
if( pStr->z[n1]!=z2[0] ) return 0;
if( strncmp(pStr->z+n1, z2, b1)!=0 ) return 0;
return 1;