Add the sqlite3changegroup_schema() API. To allow changegroup objects to upgrade the schema of a changeset/patchset under some circumstances.

FossilOrigin-Name: 03f9e50b15c9c2fb4636dee24c1491c45322578b9fed08c6f4360be07c5c3830

1 files changed, 132 insertions, 0 deletions

diff --git a/ext/session/test_session.c b/ext/session/test_session.c
index 0836238b5..df42884ef 100644
--- a/ext/session/test_session.c
+++ b/ext/session/test_session.c
@@ -1452,12 +1452,144 @@ static int SQLITE_TCLAPI test_sqlite3session_config(
   return TCL_OK;
 }
 
+typedef struct TestChangegroup TestChangegroup;
+struct TestChangegroup {
+  sqlite3_changegroup *pGrp;
+};
+
+/*
+** Destructor for Tcl changegroup command object.
+*/
+static void test_changegroup_del(void *clientData){
+  TestChangegroup *pGrp = (TestChangegroup*)clientData;
+  sqlite3changegroup_delete(pGrp->pGrp);
+  ckfree(pGrp);
+}
+
+/*
+** Tclcmd:  $changegroup schema DB DBNAME
+** Tclcmd:  $changegroup add CHANGESET
+** Tclcmd:  $changegroup output
+** Tclcmd:  $changegroup delete
+*/
+static int SQLITE_TCLAPI test_changegroup_cmd(
+  void * clientData,
+  Tcl_Interp *interp,
+  int objc,
+  Tcl_Obj *CONST objv[]
+){
+  TestChangegroup *p = (TestChangegroup*)clientData;
+  static struct ChangegroupCmd {
+    const char *zSub;
+    int nArg;
+    const char *zMsg;
+    int iSub;
+  } aSub[] = {
+    { "schema",       2, "DB DBNAME",  }, /* 0 */
+    { "add",          1, "CHANGESET",  }, /* 1 */
+    { "output",       0, "",           }, /* 2 */
+    { "delete",       0, "",           }, /* 3 */
+    { 0 }
+  };
+  int rc = TCL_OK;
+  int iSub = 0;
+
+  if( objc<2 ){
+    Tcl_WrongNumArgs(interp, 1, objv, "SUBCOMMAND ...");
+    return TCL_ERROR;
+  }
+  rc = Tcl_GetIndexFromObjStruct(interp, 
+      objv[1], aSub, sizeof(aSub[0]), "sub-command", 0, &iSub
+  );
+  if( rc!=TCL_OK ) return rc;
+  if( objc!=2+aSub[iSub].nArg ){
+    Tcl_WrongNumArgs(interp, 2, objv, aSub[iSub].zMsg);
+    return TCL_ERROR;
+  }
+
+  switch( iSub ){
+    case 0: {      /* schema */
+      sqlite3 *db = 0;
+      const char *zDb = Tcl_GetString(objv[3]);
+      if( dbHandleFromObj(interp, objv[2], &db) ){
+        return TCL_ERROR;
+      }
+      rc = sqlite3changegroup_schema(p->pGrp, db, zDb);
+      if( rc!=SQLITE_OK ) rc = test_session_error(interp, rc, 0);
+      break;
+    };
+
+    case 1: {      /* add */
+      int nByte = 0;
+      const u8 *aByte = Tcl_GetByteArrayFromObj(objv[2], &nByte);
+      rc = sqlite3changegroup_add(p->pGrp, nByte, (void*)aByte);
+      if( rc!=SQLITE_OK ) rc = test_session_error(interp, rc, 0);
+      break;
+    };
+
+    case 2: {      /* output */
+      int nByte = 0;
+      const u8 *aByte = 0;
+      rc = sqlite3changegroup_output(p->pGrp, &nByte, (void**)&aByte);
+      if( rc!=SQLITE_OK ){
+        rc = test_session_error(interp, rc, 0);
+      }else{
+        Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(aByte, nByte));
+      }
+      sqlite3_free(aByte);
+      break;
+    };
+
+    default: {     /* delete */
+      assert( iSub==3 );
+      Tcl_DeleteCommand(interp, Tcl_GetString(objv[0]));
+      break;
+    }
+  }
+
+  return rc;
+}
+
+/*
+** Tclcmd:  sqlite3changegroup CMD
+*/
+static int SQLITE_TCLAPI test_sqlite3changegroup(
+  void * clientData,
+  Tcl_Interp *interp,
+  int objc,
+  Tcl_Obj *CONST objv[]
+){
+  int rc;                         /* sqlite3changegroup_new() return code */
+  TestChangegroup *p;             /* New wrapper object */
+
+  if( objc!=2 ){
+    Tcl_WrongNumArgs(interp, 1, objv, "CMD");
+    return TCL_ERROR;
+  }
+
+  p = (TestChangegroup*)ckalloc(sizeof(TestChangegroup));
+  memset(p, 0, sizeof(TestChangegroup));
+  rc = sqlite3changegroup_new(&p->pGrp);
+  if( rc!=SQLITE_OK ){
+    ckfree((char*)p);
+    return test_session_error(interp, rc, 0);
+  }
+
+  Tcl_CreateObjCommand(
+      interp, Tcl_GetString(objv[1]), test_changegroup_cmd, (ClientData)p,
+      test_changegroup_del
+  );
+  Tcl_SetObjResult(interp, objv[1]);
+  return TCL_OK;
+}
+
 int TestSession_Init(Tcl_Interp *interp){
   struct Cmd {
     const char *zCmd;
     Tcl_ObjCmdProc *xProc;
   } aCmd[] = {
     { "sqlite3session", test_sqlite3session },
+    { "sqlite3changegroup", test_sqlite3changegroup },
     { "sqlite3session_foreach", test_sqlite3session_foreach },
     { "sqlite3changeset_invert", test_sqlite3changeset_invert },
     { "sqlite3changeset_concat", test_sqlite3changeset_concat },