Break out the upsert code into a separate source file.

FossilOrigin-Name: 389806b05f163687d8eb858b0f87f9a2d02e90af9f2097924a66715f05177613

src/upsert.c

@@ -0,0 +1,72 @@
+/*
+** 2018-04-12
+**
+** The author disclaims copyright to this source code.  In place of
+** a legal notice, here is a blessing:
+**
+**    May you do good and not evil.
+**    May you find forgiveness for yourself and forgive others.
+**    May you share freely, never taking more than you give.
+**
+*************************************************************************
+** This file contains code to implement various aspects of UPSERT
+** processing and handling of the Upsert object.
+*/
+#include "sqliteInt.h"
+
+#ifndef SQLITE_OMIT_UPSERT
+/*
+** Free a list of Upsert objects
+*/
+void sqlite3UpsertDelete(sqlite3 *db, Upsert *p){
+  while( p ){
+    Upsert *pNext = p->pUpsertNext;
+    sqlite3ExprListDelete(db, p->pUpsertTarget);
+    sqlite3ExprListDelete(db, p->pUpsertSet);
+    sqlite3ExprDelete(db, p->pUpsertWhere);
+    sqlite3DbFree(db, p);
+    p = pNext;
+  }
+}
+
+/*
+** Duplicate an Upsert object.
+*/
+Upsert *sqlite3UpsertDup(sqlite3 *db, Upsert *p){
+  if( p==0 ) return 0;
+  return sqlite3UpsertNew(db,
+           sqlite3UpsertDup(db, p->pUpsertNext),
+           sqlite3ExprListDup(db, p->pUpsertTarget, 0),
+           sqlite3ExprListDup(db, p->pUpsertSet, 0),
+           sqlite3ExprDup(db, p->pUpsertWhere, 0)
+         );
+}
+
+/*
+** Create a new Upsert object.
+*/
+Upsert *sqlite3UpsertNew(
+  sqlite3 *db,           /* Determines which memory allocator to use */
+  Upsert *pPrior,        /* Append this upsert to the end of the new one */
+  ExprList *pTarget,     /* Target argument to ON CONFLICT, or NULL */
+  ExprList *pSet,        /* UPDATE columns, or NULL for a DO NOTHING */
+  Expr *pWhere           /* WHERE clause for the ON CONFLICT UPDATE */
+){
+  Upsert *pNew;
+  pNew = sqlite3DbMallocRaw(db, sizeof(Upsert));
+  if( pNew==0 ){
+    sqlite3UpsertDelete(db, pPrior);
+    sqlite3ExprListDelete(db, pTarget);
+    sqlite3ExprListDelete(db, pSet);
+    sqlite3ExprDelete(db, pWhere);
+    return 0;
+  }else{
+    pNew->pUpsertTarget = pTarget;
+    pNew->pUpsertSet = pSet;
+    pNew->pUpsertNext = pPrior;
+    pNew->pUpsertWhere = pWhere;
+  }
+  return pNew;
+}
+
+#endif /* SQLITE_OMIT_UPSERT */