Begin adding the data-structure explaining subsystem. All is contained within
FossilOrigin-Name: 79ae51c5b1b20ed0a425a87e65a32a096a80b7e1
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 890f44f..1e7af8e 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -2650,6 +2650,29 @@
#if defined(SQLITE_TEST)
void *sqlite3TestTextToPtr(const char*);
#endif
+
+/* Output formatting for SQLITE_TESTCTRL_EXPLAIN */
+#if defined(SQLITE_DEBUG)
+ void sqlite3ExplainBegin(Vdbe*);
+ void sqlite3ExplainPrintf(Vdbe*, const char*, ...);
+ void sqlite3ExplainNL(Vdbe*);
+ void sqlite3ExplainPush(Vdbe*);
+ void sqlite3ExplainPop(Vdbe*);
+ void sqlite3ExplainFinish(Vdbe*);
+ void sqlite3ExplainSelect(Vdbe*, Select*);
+ void sqlite3ExplainExpr(Vdbe*, Expr*);
+ void sqlite3ExplainExprList(Vdbe*, ExprList*);
+ const char *sqlite3VdbeExplanation(Vdbe*);
+#else
+# define sqlite3ExplainBegin(X)
+# define sqlite3ExplainSelect(A,B)
+# define sqlite3ExplainExpr(A,B)
+# define sqlite3ExplainExprList(A,B)
+# define sqlite3ExplainFinish(X)
+# define sqlite3VdbeExplanation(X) 0
+#endif
+
+
void sqlite3SetString(char **, sqlite3*, const char*, ...);
void sqlite3ErrorMsg(Parse*, const char*, ...);
int sqlite3Dequote(char*);
@@ -3030,6 +3053,7 @@
void sqlite3StrAccumInit(StrAccum*, char*, int, int);
void sqlite3StrAccumAppend(StrAccum*,const char*,int);
+void sqlite3AppendSpace(StrAccum*,int);
char *sqlite3StrAccumFinish(StrAccum*);
void sqlite3StrAccumReset(StrAccum*);
void sqlite3SelectDestInit(SelectDest*,int,int);