public int RunParser(string sql, ref string errMsg)
{
Debug.Assert(errMsg != null);
Debug.Assert(NewTable == null);
Debug.Assert(NewTrigger == null);
Debug.Assert(VarsSeen == 0);
Debug.Assert(Vars.length == 0);
Debug.Assert(Vars.data == null);
Context ctx = Ctx; // The database connection
int maxSqlLength = ctx.Limits[(int)LIMIT.SQL_LENGTH]; // Max length of an SQL string
if (ctx.ActiveVdbeCnt == 0)
{
ctx.u1.IsInterrupted = false;
}
RC = RC.OK;
Tail = new StringBuilder(sql);
yyParser engine = Parser_Alloc(); // The LEMON-generated LALR(1) parser
if (engine == null)
{
ctx.MallocFailed = true;
return((int)RC.NOMEM);
}
bool enableLookaside = ctx.Lookaside.Enabled; // Saved value of db->lookaside.bEnabled
if (ctx.Lookaside.Start != 0)
{
ctx.Lookaside.Enabled = true;
}
int errs = 0; // Number of errors encountered
TK tokenType = 0; // type of the next token
TK lastTokenParsed = 0; // type of the previous token
int i = 0;
while (/* !ctx.MallocFailed && */ i < sql.Length)
{
Debug.Assert(i >= 0);
LastToken.data = sql.Substring(i);
LastToken.length = (uint)GetToken(sql, i, ref tokenType);
i += (int)LastToken.length;
if (i > maxSqlLength)
{
RC = RC.TOOBIG;
break;
}
switch (tokenType)
{
case TK.SPACE:
{
if (ctx.u1.IsInterrupted)
{
ErrorMsg("interrupt");
RC = RC.INTERRUPT;
goto abort_parse;
}
break;
}
case TK.ILLEGAL:
{
C._tagfree(ctx, ref errMsg);
errMsg = SysEx.Mprintf(ctx, "unrecognized token: \"%T\"", (object)LastToken);
errs++;
goto abort_parse;
}
case TK.SEMI:
{
//Tail = new StringBuilder(sql.Substring(i, sql.Length - i));
goto default;
}
default:
{
Parser(engine, tokenType, LastToken, this);
lastTokenParsed = tokenType;
if (RC != RC.OK)
{
goto abort_parse;
}
break;
}
}
}
abort_parse:
Tail = new StringBuilder(sql.Length <= i ? string.Empty : sql.Substring(i, sql.Length - i));
if (sql.Length >= i && errs == 0 && RC == RC.OK)
{
if (lastTokenParsed != TK.SEMI)
{
Parser(engine, TK.SEMI, LastToken, this);
}
Parser(engine, 0, LastToken, this);
}
#if YYTRACKMAXSTACKDEPTH
sqlite3StatusSet(SQLITE_STATUS_PARSER_STACK, sqlite3ParserStackPeak(engine));
#endif
Parser_Free(engine, null);
ctx.Lookaside.Enabled = enableLookaside;
//if (ctx.MallocFailed)
// RC = RC.NOMEM;
if (RC != RC.OK && RC != RC.DONE && string.IsNullOrEmpty(ErrMsg))
{
SetString(ref ErrMsg, ctx, ErrStr(RC));
}
if (ErrMsg != null)
{
errMsg = ErrMsg;
SysEx.LOG(RC, "%s", errMsg);
ErrMsg = string.Empty;
errs++;
}
if (V != null && Errs > 0 && Nested == 0)
{
Vdbe.Delete(ref V);
V = null;
}
#if !OMIT_SHARED_CACHE
if (Nested == 0)
{
C._tagfree(ctx, ref TableLocks.data);
TableLocks.data = null;
TableLocks.length = 0;
}
#endif
#if !OMIT_VIRTUALTABLE
VTableLocks.data = null;
#endif
if (!E.INDECLARE_VTABLE(this))
{
// If the pParse.declareVtab flag is set, do not delete any table structure built up in pParse.pNewTable. The calling code (see vtab.c)
// will take responsibility for freeing the Table structure.
DeleteTable(ctx, ref NewTable);
}
#if !OMIT_TRIGGER
DeleteTrigger(ctx, ref NewTrigger);
#endif
//for (i = Vars.length - 1; i >= 0; i--)
// C._tagfree(ctx, ref Vars.data[i]);
C._tagfree(ctx, ref Vars.data);
C._tagfree(ctx, ref Alias.data);
while (Ainc != null)
{
AutoincInfo p = Ainc;
Ainc = p.Next;
C._tagfree(ctx, ref p);
}
while (ZombieTab != null)
{
Table p = ZombieTab;
ZombieTab = p.NextZombie;
DeleteTable(ctx, ref p);
}
if (errs > 0 && RC == RC.OK)
{
RC = RC.ERROR;
}
return(errs);
}