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The first simple test-case appears to be working now.

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FossilOrigin-Name: dd41155bc7459cafc1a2d5c75233193abfbac05d
This commit is contained in:
drh
2011-03-29 18:21:59 +00:00
parent 72384dc28f
commit c8e27ab5da
4 changed files with 59 additions and 19 deletions
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60
src/test_fuzzer.c
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@@ -255,14 +255,17 @@ static int fuzzerRender(
}
n = pStem->n;
z = *pzBuf;
memcpy(z, pStem->zBasis, n);
memcpy(&z[n], pRule->zTo, pRule->nTo);
memcpy(&z[n+pRule->nTo], &pStem->zBasis[n+pRule->nFrom],
pStem->nBasis-n-pRule->nFrom+1);
if( n<0 ){
memcpy(z, pStem->zBasis, pStem->nBasis+1);
}else{
memcpy(z, pStem->zBasis, n);
memcpy(&z[n], pRule->zTo, pRule->nTo);
memcpy(&z[n+pRule->nTo], &pStem->zBasis[n+pRule->nFrom],
pStem->nBasis-n-pRule->nFrom+1);
}
return SQLITE_OK;
}
/*
** Compute a hash on zBasis.
*/
@@ -279,6 +282,35 @@ static fuzzer_cost fuzzerCost(fuzzer_stem *pStem){
return pStem->rBaseCost + pStem->pRule->rCost;
}
#if 0
/*
** Print a description of a fuzzer_stem on stderr.
*/
static void fuzzerStemPrint(
const char *zPrefix,
fuzzer_stem *pStem,
const char *zSuffix
){
if( pStem->n<0 ){
fprintf(stderr, "%s[%s](%d)-->self%s",
zPrefix,
pStem->zBasis, pStem->rBaseCost,
zSuffix
);
}else{
char *zBuf = 0;
int nBuf = 0;
if( fuzzerRender(pStem, &zBuf, &nBuf)!=SQLITE_OK ) return;
fprintf(stderr, "%s[%s](%d)-->{%s}(%d)%s",
zPrefix,
pStem->zBasis, pStem->rBaseCost, zBuf, fuzzerCost(pStem),
zSuffix
);
sqlite3_free(zBuf);
}
}
#endif
/*
** Return 1 if the string to which the cursor is point has already
** been emitted. Return 0 if not. Return -1 on a memory allocation
@@ -315,7 +347,9 @@ static int fuzzerAdvance(fuzzer_cursor *pCur, fuzzer_stem *pStem){
/* Found a rewrite case. Make sure it is not a duplicate */
int rc = fuzzerSeen(pCur, pStem);
if( rc<0 ) return -1;
if( rc==0 ) return 1;
if( rc==0 ){
return 1;
}
}
}
pStem->n = -1;
@@ -417,17 +451,23 @@ static int fuzzerNext(sqlite3_vtab_cursor *cur){
*/
while( (pStem = pCur->pStem)!=0 ){
if( fuzzerAdvance(pCur, pStem) ){
pCur->pStem = fuzzerInsert(pStem->pNext, pStem);
if( pCur->pStem!=pStem && (rc = fuzzerSeen(pCur, pStem))!=0 ){
pCur->pStem = pStem = fuzzerInsert(pStem->pNext, pStem);
if( (rc = fuzzerSeen(pCur, pStem))!=0 ){
if( rc<0 ) return SQLITE_NOMEM;
continue;
}else{
return SQLITE_OK; /* New word found */
}
return SQLITE_OK; /* New word found */
}
pCur->pStem = pStem->pNext;
pStem->pNext = pCur->pDone;
pCur->pDone = pStem;
if( pCur->pStem ){
rc = fuzzerSeen(pCur, pCur->pStem);
if( rc<0 ) return SQLITE_NOMEM;
if( rc==0 ){
return SQLITE_OK;
}
}
}
/* Reach this point only if queue has been exhausted and there is