Minor comment changes and code optimizations. (CVS 3029)

FossilOrigin-Name: 9e55dcd1a57f2b6ad5b267e8fa58c58b266dc8c7

src/prepare.c

@@ -13,7 +13,7 @@
 ** interface, and routines that contribute to loading the database schema
 ** from disk.
 **
-** $Id: prepare.c,v 1.28 2006/01/23 00:04:55 drh Exp $
+** $Id: prepare.c,v 1.29 2006/01/25 22:50:38 drh Exp $
 */
 #include "sqliteInt.h"
 #include "os.h"
@@ -217,7 +217,7 @@ static int sqlite3InitOne(sqlite3 *db, int iDb, char **pzErrMsg){
   **    meta[8]
   **    meta[9]
   **
-  ** Note: The hash defined SQLITE_UTF* symbols in sqliteInt.h correspond to
+  ** Note: The #defined SQLITE_UTF* symbols in sqliteInt.h correspond to
   ** the possible values of meta[4].
   */
   if( rc==SQLITE_OK ){
@@ -440,6 +440,10 @@ void sqlite3SchemaFree(void *p){
   pSchema->flags &= ~DB_SchemaLoaded;
 }
 
+/*
+** Find and return the schema associated with a BTree.  Create
+** a new one if necessary.
+*/
 Schema *sqlite3SchemaGet(Btree *pBt){
   Schema * p;
   if( pBt ){
@@ -456,6 +460,13 @@ Schema *sqlite3SchemaGet(Btree *pBt){
   return p;
 }
 
+/*
+** Convert a schema pointer into the iDb index that indicates
+** which database file in db->aDb[] the schema refers to.
+**
+** If the same database is attached more than once, the first
+** attached database is returned.
+*/
 int sqlite3SchemaToIndex(sqlite3 *db, Schema *pSchema){
   int i = -1000000;
 

src/vdbeaux.c

@@ -102,7 +102,8 @@ int sqlite3VdbeAddOp(Vdbe *p, int op, int p1, int p2){
   p->nOp++;
   assert( p->magic==VDBE_MAGIC_INIT );
   resizeOpArray(p, i+1);
-  if( p->aOp==0 || p->nOpAlloc<=i ){
+  assert( p->aOp==0 || p->nOpAlloc>=i+1 );
+  if( p->aOp==0 ){
     return 0;
   }
   pOp = &p->aOp[i];