SQLITE_PRIVATE void sqlite3ExplainBegin(Vdbe *pVdbe){
if( pVdbe ){
sqlite3BeginBenignMalloc();
Explain *p = sqlite3_malloc( sizeof(Explain) );
if( p ){
memset(p, 0, sizeof(*p));
p->pVdbe = pVdbe;
sqlite3_free(pVdbe->pExplain);
pVdbe->pExplain = p;
sqlite3StrAccumInit(&p->str, p->zBase, sizeof(p->zBase),
SQLITE_MAX_LENGTH);
p->str.useMalloc = 2;
}else{
sqlite3EndBenignMalloc();
}
}
}
MSVC compilers do not like constructs which allocate locals on the stack except
immediately after the initiation of a code block. Perhaps fixed in later
versions of the compiler, perhaps not, or perhaps there is a magic incantation
to make the compiler behave properly. In any case, the slight modification
does not affect the semantics of the code.
This can be fixed as follows, so that even primitive compilers will not
complain:
SQLITE_PRIVATE void sqlite3ExplainBegin(Vdbe *pVdbe){
if( pVdbe ){
Explain *p;
sqlite3BeginBenignMalloc();
p = sqlite3_malloc( sizeof(Explain) );
if( p ){
memset(p, 0, sizeof(*p));
p->pVdbe = pVdbe;
sqlite3_free(pVdbe->pExplain);
pVdbe->pExplain = p;
sqlite3StrAccumInit(&p->str, p->zBase, sizeof(p->zBase),
SQLITE_MAX_LENGTH);
p->str.useMalloc = 2;
}else{
sqlite3EndBenignMalloc();
}
}
}
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