Tcl Source Code

.TP
\fBo\fR
.
The input substring must be an octal integer. It is read in and the 
integer value is stored in the variable,
truncated as required by the size modifier value.
.TP
\fBx\fR or \fBX\fR
.
The input substring must be a hexadecimal integer.
It is read in and the integer value is stored in the variable,
truncated as required by the size modifier value.
.TP
\fBb\fR
.

substring may be a white-space character.
.TP
\fBs\fR
.
The input substring consists of all the characters up to the next 
white-space character; the characters are copied to the variable.
.TP
\fBe\fR or \fBf\fR or \fBg\fR or \fBE\fR or \fBG\fR
.
The input substring must be a floating-point number consisting 
of an optional sign, a string of decimal digits possibly
containing a decimal point, and an optional exponent consisting 
of an \fBe\fR or \fBE\fR followed by an optional sign and a string of 
decimal digits.
It is read in and stored in the variable as a floating-point value.

 * Allow a part of Tcl's API to be explicitly marked as deprecated.
 *
 * Used to make TIP 330/336 generate moans even if people use the
 * compatibility macros. Change your code, guys! We won't support you forever.
 */

#if defined(__GNUC__) && ((__GNUC__ >= 4) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 1)))
#   if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5))
#	define TCL_DEPRECATED_API(msg)	__attribute__ ((__deprecated__ (msg)))
#   else
#	define TCL_DEPRECATED_API(msg)	__attribute__ ((__deprecated__))
#   endif
#else
#   define TCL_DEPRECATED_API(msg)	/* nothing portable */
#endif

			    int count);
static void		BBEmitInstInt1(AssemblyEnv* assemEnvPtr, int tblIdx,
			    int opnd, int count);
static void		BBEmitInstInt4(AssemblyEnv* assemEnvPtr, int tblIdx,
			    int opnd, int count);
static void		BBEmitInst1or4(AssemblyEnv* assemEnvPtr, int tblIdx,
			    int param, int count);
static void		BBEmitInvoke1or4(AssemblyEnv* assemEnvPtr, int tblIdx,
			    int param, int count);
static void		BBEmitOpcode(AssemblyEnv* assemEnvPtr, int tblIdx,
			    int count);
static int		BuildExceptionRanges(AssemblyEnv* assemEnvPtr);
static int		CalculateJumpRelocations(AssemblyEnv*, int*);
static int		CheckForUnclosedCatches(AssemblyEnv*);
static int		CheckForThrowInWrongContext(AssemblyEnv*);
static int		CheckNonThrowingBlock(AssemblyEnv*, BasicBlock*);

    BBEmitOpcode(assemEnvPtr, tblIdx, count);
    TclEmitInt4(opnd, assemEnvPtr->envPtr);
}

/*
 *-----------------------------------------------------------------------------
 *
 * BBEmitInst1or4, BBEmitInvoke1or4 --
 *
 *	Emits a 1- or 4-byte operation according to the magnitude of the
 *	operand. The Invoke variant generates wrapping stack-balance
 *	management if necessary (which is not normally required in assembled
 *	code, as loop exception ranges, expansions, breaks and continues can't
 *	be issued currently).
 *
 *-----------------------------------------------------------------------------
 */

static void
BBEmitInst1or4(
    AssemblyEnv* assemEnvPtr,	/* Assembly environment */

    }
    TclEmitInt1(op, envPtr);
    if (param <= 0xff) {
	TclEmitInt1(param, envPtr);
    } else {
	TclEmitInt4(param, envPtr);
    }
    TclUpdateAtCmdStart(op, envPtr);
    BBUpdateStackReqs(bbPtr, tblIdx, count);
}

static void
BBEmitInvoke1or4(
    AssemblyEnv* assemEnvPtr,	/* Assembly environment */
    int tblIdx,			/* Index in TalInstructionTable of op */
    int param,			/* Variable-length parameter */
    int count)			/* Arity if variadic */
{
    CompileEnv* envPtr = assemEnvPtr->envPtr;
				/* Compilation environment */
    BasicBlock* bbPtr = assemEnvPtr->curr_bb;
				/* Current basic block */
    int op = TalInstructionTable[tblIdx].tclInstCode;

    if (param <= 0xff) {
	op >>= 8;
    } else {
	op &= 0xff;
    }
    TclEmitInvoke(envPtr, op, param);
    TclUpdateAtCmdStart(op, envPtr);
    BBUpdateStackReqs(bbPtr, tblIdx, count);
}

/*
 *-----------------------------------------------------------------------------
 *

	    goto cleanup;
	}
	if (GetIntegerOperand(assemEnvPtr, &tokenPtr, &opnd) != TCL_OK
		|| CheckStrictlyPositive(interp, opnd) != TCL_OK) {
	    goto cleanup;
	}

	BBEmitInvoke1or4(assemEnvPtr, tblIdx, opnd, opnd);
	break;

    case ASSEM_JUMP:
    case ASSEM_JUMP4:
	if (parsePtr->numWords != 2) {
	    Tcl_WrongNumArgs(interp, 1, &instNameObj, "label");
	    goto cleanup;

    /*
     * Special case: literal odd-length argument is always an error.
     */

    if (isDataValid && !isDataEven) {
	PushStringLiteral(envPtr, "list must have an even number of elements");
	PushStringLiteral(envPtr, "-errorCode {TCL ARGUMENT FORMAT}");
	TclEmitInstInt4(INST_RETURN_IMM, TCL_ERROR,		envPtr);
	TclEmitInt4(		0,				envPtr);
	goto done;
    }

    /*
     * Except for the special "ensure array" case below, when we're not in
     * a proc, we cannot do a better compile than generic.

	TclEmitOpcode(	INST_LIST_LENGTH,			envPtr);
	PushStringLiteral(envPtr, "1");
	TclEmitOpcode(	INST_BITAND,				envPtr);
	offsetFwd = CurrentOffset(envPtr);
	TclEmitInstInt1(INST_JUMP_FALSE1, 0,			envPtr);
	PushStringLiteral(envPtr, "list must have an even number of elements");
	PushStringLiteral(envPtr, "-errorCode {TCL ARGUMENT FORMAT}");
	TclEmitInstInt4(INST_RETURN_IMM, TCL_ERROR,		envPtr);
	TclEmitInt4(		0,				envPtr);
	TclAdjustStackDepth(-1, envPtr);
	fwd = CurrentOffset(envPtr) - offsetFwd;
	TclStoreInt1AtPtr(fwd, envPtr->codeStart+offsetFwd+1);
    }
    Emit14Inst(		INST_STORE_SCALAR, dataVar,		envPtr);
    TclEmitOpcode(	INST_POP,				envPtr);

	BODY(cmdTokenPtr, 1);
    } else {
	SetLineInformation(1);
	CompileTokens(envPtr, cmdTokenPtr, interp);
	TclEmitInstInt4(	INST_BEGIN_CATCH4, range,	envPtr);
	ExceptionRangeStarts(envPtr, range);
	TclEmitOpcode(		INST_DUP,			envPtr);
	TclEmitInvoke(envPtr,	INST_EVAL_STK);
    }
    /* Stack at this point:
     *    nonsimple:  script <mark> result
     *    simple:            <mark> result
     */

    if (resultIndex == -1) {

    TclEmitOpcode(	INST_PUSH_RESULT,			envPtr);
    TclEmitOpcode(	INST_PUSH_RETURN_OPTIONS,		envPtr);
    TclEmitOpcode(	INST_END_CATCH,				envPtr);
    TclEmitInstInt4(	INST_REVERSE, 3,			envPtr);

    TclEmitInstInt4(	INST_DICT_UPDATE_END, dictIndex,	envPtr);
    TclEmitInt4(		infoIndex,			envPtr);
    TclEmitInvoke(envPtr,INST_RETURN_STK);

    if (TclFixupForwardJumpToHere(envPtr, &jumpFixup, 127)) {
	Tcl_Panic("TclCompileDictCmd(update): bad jump distance %d",
		(int) (CurrentOffset(envPtr) - jumpFixup.codeOffset));
    }
    TclStackFree(interp, keyTokenPtrs);
    return TCL_OK;

    }
    Emit14Inst(			INST_LOAD_SCALAR, keysTmp,	envPtr);
    if (dictVar == -1) {
	TclEmitOpcode(		INST_DICT_RECOMBINE_STK,	envPtr);
    } else {
	TclEmitInstInt4(	INST_DICT_RECOMBINE_IMM, dictVar, envPtr);
    }
    TclEmitInvoke(envPtr,	INST_RETURN_STK);

    /*
     * Prepare for the start of the next command.
     */

    if (TclFixupForwardJumpToHere(envPtr, &jumpFixup, 127)) {
	Tcl_Panic("TclCompileDictCmd(update): bad jump distance %d",

				 * created by Tcl_ParseCommand. */
    Command *cmdPtr,		/* Points to defintion of command being
				 * compiled. */
    CompileEnv *envPtr)		/* Holds resulting instructions. */
{
    /*
     * General syntax: [error message ?errorInfo? ?errorCode?]

     */

    Tcl_Token *tokenPtr;
    DefineLineInformation;	/* TIP #280 */

    if (parsePtr->numWords < 2 || parsePtr->numWords > 4) {
	return TCL_ERROR;
    }

    /*
     * Handle the message.
     */

    tokenPtr = TokenAfter(parsePtr->tokenPtr);
    CompileWord(envPtr, tokenPtr, interp, 1);

    /*
     * Construct the options. Note that -code and -level are not here.
     */

    if (parsePtr->numWords == 2) {
	PushStringLiteral(envPtr, "");
    } else {
	PushStringLiteral(envPtr, "-errorinfo");
	tokenPtr = TokenAfter(tokenPtr);
	CompileWord(envPtr, tokenPtr, interp, 2);
	if (parsePtr->numWords == 3) {
	    TclEmitInstInt4(	INST_LIST, 2,			envPtr);
	} else {
	    PushStringLiteral(envPtr, "-errorcode");
	    tokenPtr = TokenAfter(tokenPtr);
	    CompileWord(envPtr, tokenPtr, interp, 3);
	    TclEmitInstInt4(	INST_LIST, 4,			envPtr);
	}
    }

    /*
     * Issue the error via 'returnImm error 0'.
     */

    TclEmitInstInt4(		INST_RETURN_IMM, TCL_ERROR,	envPtr);
    TclEmitInt4(			0,			envPtr);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * TclCompileExprCmd --

	    && (wordTokenPtr[1].size == 8)
	    && (strncmp(wordTokenPtr[1].start, "-options", 8) == 0)) {
	Tcl_Token *optsTokenPtr = TokenAfter(wordTokenPtr);
	Tcl_Token *msgTokenPtr = TokenAfter(optsTokenPtr);

	CompileWord(envPtr, optsTokenPtr, interp, 2);
	CompileWord(envPtr, msgTokenPtr,  interp, 3);
	TclEmitInvoke(envPtr, INST_RETURN_STK);
	return TCL_OK;
    }

    /*
     * Allocate some working space.
     */

    objv = TclStackAlloc(interp, numOptionWords * sizeof(Tcl_Obj *));

    /*
     * Scan through the return options. If any are unknown at compile time,
     * there is no value in bytecompiling. Save the option values known in an
     * objv array for merging into a return options dictionary.
     *
     * TODO: There is potential for improvement if all option keys are known
     * at compile time and all option values relating to '-code' and '-level'
     * are known at compile time.
     */

    for (objc = 0; objc < numOptionWords; objc++) {
	objv[objc] = Tcl_NewObj();
	Tcl_IncrRefCount(objv[objc]);
	if (!TclWordKnownAtCompileTime(wordTokenPtr, objv[objc])) {
	    /*
	     * Non-literal, so punt to run-time assembly of the dictionary.
	     */

	    for (; objc>=0 ; objc--) {
		TclDecrRefCount(objv[objc]);
	    }
	    TclStackFree(interp, objv);
	    goto issueRuntimeReturn;

	PushStringLiteral(envPtr, "");
    }

    /*
     * Issue the RETURN itself.
     */

    TclEmitInvoke(envPtr, INST_RETURN_STK);
    return TCL_OK;
}

static void
CompileReturnInternal(
    CompileEnv *envPtr,
    unsigned char op,
    int code,
    int level,
    Tcl_Obj *returnOpts)
{
    if (level == 0 && (code == TCL_BREAK || code == TCL_CONTINUE)) {
	ExceptionRange *rangePtr;
	ExceptionAux *exceptAux;

	rangePtr = TclGetInnermostExceptionRange(envPtr, code, &exceptAux);
	if (rangePtr && rangePtr->type == LOOP_EXCEPTION_RANGE) {
	    TclCleanupStackForBreakContinue(envPtr, exceptAux);
	    if (code == TCL_BREAK) {
		TclAddLoopBreakFixup(envPtr, exceptAux);
	    } else {
		TclAddLoopContinueFixup(envPtr, exceptAux);
	    }
	    Tcl_DecrRefCount(returnOpts);
	    return;
	}
    }

    TclEmitPush(TclAddLiteralObj(envPtr, returnOpts, NULL), envPtr);
    TclEmitInstInt4(op, code, envPtr);
    TclEmitInt4(level, envPtr);
}

void
TclCompileSyntaxError(

    (var) = CurrentOffset(envPtr);TclEmitInstInt1(INST_##name##1,0,envPtr)
#define FIXJUMP1(var) \
    TclStoreInt1AtPtr(CurrentOffset(envPtr)-(var),envPtr->codeStart+(var)+1)
#define LOAD(idx) \
    if ((idx)<256) {OP1(LOAD_SCALAR1,(idx));} else {OP4(LOAD_SCALAR4,(idx));}
#define STORE(idx) \
    if ((idx)<256) {OP1(STORE_SCALAR1,(idx));} else {OP4(STORE_SCALAR4,(idx));}
#define INVOKE(name) \
    TclEmitInvoke(envPtr,INST_##name)

/*
 *----------------------------------------------------------------------
 *
 * TclCompileSetCmd --
 *
 *	Procedure called to compile the "set" command.

	ExceptionRangeTarget(envPtr, catchRange, catchOffset);
	OP(	PUSH_RETURN_OPTIONS);
	OP(	PUSH_RESULT);
	OP(	PUSH_RETURN_CODE);
	OP(	END_CATCH);
	OP(	RETURN_CODE_BRANCH);

	/* ERROR -> reraise it; NB: can't require BREAK/CONTINUE handling */
	OP(	RETURN_STK);
	OP(	NOP);

	/* RETURN */
	TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, &returnFixup);

	/* BREAK */

	 * run time.
	 */
	OP4(			REVERSE, 3);
	OP(			DUP);
	OP(			LIST_LENGTH);
	OP1(			JUMP_FALSE1, 16);
	OP4(			LIST, 2);
	OP44(			RETURN_IMM, TCL_ERROR, 0);
	TclAdjustStackDepth(2, envPtr);
	OP(			POP);
	OP(			POP);
	OP(			POP);
    issueErrorForEmptyCode:
	PUSH(			"type must be non-empty list");
	PUSH(			"-errorcode {TCL OPERATION THROW BADEXCEPTION}");
    }
    OP44(			RETURN_IMM, TCL_ERROR, 0);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * TclCompileTryCmd --

	    OP(				POP);
	    PUSH(			"-during");
	    OP4(			REVERSE, 2);
	    OP44(			DICT_SET, 1, optionsVar);
	    TclAdjustStackDepth(-1, envPtr);
	    FIXJUMP1(		dontChangeOptions);
	    OP4(			REVERSE, 2);
	    INVOKE(			RETURN_STK);
	}

	JUMP4(				JUMP, addrsToFix[i]);
	if (matchClauses[i]) {
	    FIXJUMP4(	notECJumpSource);
	}
	FIXJUMP4(	notCodeJumpSource);
    }

    /*
     * Drop the result code since it didn't match any clause, and reissue the
     * exception. Note also that INST_RETURN_STK can proceed to the next
     * instruction.
     */

    OP(					POP);
    LOAD(				optionsVar);
    LOAD(				resultVar);
    INVOKE(				RETURN_STK);

    /*
     * Fix all the jumps from taken clauses to here (which is the end of the
     * [try]).
     */

    if (!trapZero) {

    OP(					POP);
    FIXJUMP1(			finalError);
    STORE(				resultVar);
    OP(					POP);
    FIXJUMP1(			finalOK);
    LOAD(				optionsVar);
    LOAD(				resultVar);
    INVOKE(				RETURN_STK);

    return TCL_OK;
}

static int
IssueTryFinallyInstructions(
    Tcl_Interp *interp,

    FIXJUMP1(		jumpSplice);
    OP4(				REVERSE, 4);
    OP(					POP);
    OP(					POP);
    OP1(				JUMP1, 7);
    FIXJUMP1(		jumpOK);
    OP4(				REVERSE, 2);
    INVOKE(				RETURN_STK);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * TclCompileUnsetCmd --

	    case FUNCTION:
		/*
		 * Use the numWords count we've kept to invoke the function
		 * command with the correct number of arguments.
		 */
		
		if (numWords < 255) {
		    TclEmitInvoke(envPtr, INST_INVOKE_STK1, numWords);
		} else {
		    TclEmitInvoke(envPtr, INST_INVOKE_STK4, numWords);
		}

		/*
		 * Restore any saved numWords value.
		 */

		numWords = nodePtr->left;

	    TclContinuationsEnterDerived(TclFetchLiteral(envPtr, objIdx),
		    tokenPtr[1].start - envPtr->source, envPtr->clNext);
	}
	TclEmitPush(objIdx, envPtr);
    }

    if (wordIdx <= 255) {
	TclEmitInvoke(envPtr, INST_INVOKE_STK1, wordIdx);
    } else {
	TclEmitInvoke(envPtr, INST_INVOKE_STK4, wordIdx);
    }
}

static void
CompileExpanded(
    Tcl_Interp *interp,
    Tcl_Token *tokenPtr,
    Tcl_Obj *cmdObj,
    int numWords,
    CompileEnv *envPtr)
{
    int wordIdx = 0;
    DefineLineInformation;


    StartExpanding(envPtr);
    if (cmdObj) {
	CompileCmdLiteral(interp, cmdObj, envPtr);
	wordIdx = 1;
	tokenPtr = TokenAfter(tokenPtr);
    }

	    TclContinuationsEnterDerived(TclFetchLiteral(envPtr, objIdx),
		    tokenPtr[1].start - envPtr->source, envPtr->clNext);
	}
	TclEmitPush(objIdx, envPtr);
    }

    /*
     * The stack depth during argument expansion can only be managed at
     * runtime, as the number of elements in the expanded lists is not known

     * at compile time. We adjust here the stack depth estimate so that it is
     * correct after the command with expanded arguments returns.
     *
     * The end effect of this command's invocation is that all the words of
     * the command are popped from the stack, and the result is pushed: the
     * stack top changes by (1-wordIdx).
     *
     * Note that the estimates are not correct while the command is being
     * prepared and run, INST_EXPAND_STKTOP is not stack-neutral in general.

     */

    TclEmitInvoke(envPtr, INST_INVOKE_EXPANDED, wordIdx);


}

static int 
CompileCmdCompileProc(
    Tcl_Interp *interp,
    Tcl_Parse *parsePtr,
    Command *cmdPtr,
    CompileEnv *envPtr)
{
    int unwind = 0, incrOffset = -1;
    DefineLineInformation;

    /*
     * Emit of the INST_START_CMD instruction is controlled by the value of
     * envPtr->atCmdStart:
     *
     * atCmdStart == 2	: We are not using the INST_START_CMD instruction.
     * atCmdStart == 1	: INST_START_CMD was the last instruction emitted.
     *			: We do not need to emit another.  Instead we
     *			: increment the number of cmds started at it (except
     *			: for the special case at the start of a script.)
     * atCmdStart == 0	: The last instruction was something else.  We need

	/* Nothing to do */
	;
    }

    if (TCL_OK == TclAttemptCompileProc(interp, parsePtr, 1, cmdPtr, envPtr)) {
	if (incrOffset >= 0) {
	    /*
	     * We successfully compiled a command.  Increment the number of
	     * commands that start at the currently active INST_START_CMD.
	     */

	    unsigned char *incrPtr = envPtr->codeStart + incrOffset;
	    unsigned char *startPtr = incrPtr - 5;

	    TclIncrUInt4AtPtr(incrPtr, 1);
	    if (unwind) {
		/* We started the INST_START_CMD.  Record the code length. */
		TclStoreInt4AtPtr(envPtr->codeNext - startPtr, startPtr + 1);
	    }
	}
	return TCL_OK;
    }

    envPtr->codeNext -= unwind; /* Unwind INST_START_CMD */

    /*
     * Throw out any line information generated by the failed compile attempt.

     */

    while (mapPtr->nuloc - 1 > eclIndex) {
	mapPtr->nuloc--;
	ckfree(mapPtr->loc[mapPtr->nuloc].line);
	mapPtr->loc[mapPtr->nuloc].line = NULL;
    }

    /*
     * Reset the index of next command.  Toss out any from failed nested
     * partial compiles.
     */


    envPtr->numCommands = mapPtr->nuloc;
    return TCL_ERROR;
}

static int
CompileCommandTokens(
    Tcl_Interp *interp,
    Tcl_Parse *parsePtr,

    /* Pre-Compile */

    envPtr->numCommands++;
    EnterCmdStartData(envPtr, cmdIdx,
	    parsePtr->commandStart - envPtr->source, startCodeOffset);

    /*
     * TIP #280. Scan the words and compute the extended location information.
     * The map first contain full per-word line information for use by the
     * compiler. This is later replaced by a reduced form which signals
     * non-literal words, stored in 'wlines'.

     */

    EnterCmdWordData(eclPtr, parsePtr->commandStart - envPtr->source,
	    parsePtr->tokenPtr, parsePtr->commandStart,
	    parsePtr->commandSize, parsePtr->numWords, cmdLine,
	    clNext, &wlines, envPtr);
    wlineat = eclPtr->nuloc - 1;

    cmdKnown = TclWordKnownAtCompileTime(tokenPtr, cmdObj);

    /* Is this a command we should (try to) compile with a compileProc ? */
    if (cmdKnown && !(iPtr->flags & DONT_COMPILE_CMDS_INLINE)) {
	cmdPtr = (Command *) Tcl_GetCommandFromObj(interp, cmdObj);
	if (cmdPtr) {
	    /*
	     * Found a command.  Test the ways we can be told not to attempt
	     * to compile it.
	     */
	    if ((cmdPtr->compileProc == NULL)
		    || (cmdPtr->nsPtr->flags & NS_SUPPRESS_COMPILATION)
		    || (cmdPtr->flags & CMD_HAS_EXEC_TRACES)) {
		cmdPtr = NULL;
	    }
	}

    TclEmitOpcode(INST_POP, envPtr);
    EnterCmdExtentData(envPtr, cmdIdx,
	    parsePtr->term - parsePtr->commandStart,
	    (envPtr->codeNext-envPtr->codeStart) - startCodeOffset);

    /*
     * TIP #280: Free full form of per-word line data and insert the reduced
     * form now
     */

    envPtr->line = cmdLine;
    envPtr->clNext = clNext;
    ckfree(eclPtr->loc[wlineat].line);
    ckfree(eclPtr->loc[wlineat].next);
    eclPtr->loc[wlineat].line = wlines;

	next = parse.commandStart + parse.commandSize;
	numBytes -= next - p;
	p = next;

	if (parse.numWords == 0) {
	    /*
	     * The "command" parsed has no words.  In this case we can skip
	     * the rest of the loop body.  With no words, clearly
	     * CompileCommandTokens() has nothing to do.  Since the parser
	     * aggressively sucks up leading comment and white space,
	     * including newlines, parse.commandStart must be pointing at
	     * either the end of script, or a command-terminating semi-colon.
	     * In either case, the TclAdvance*() calls have nothing to do.
	     * Finally, when no words are parsed, no tokens have been
	     * allocated at parse.tokenPtr so there's also nothing for
	     * Tcl_FreeParse() to do.
	     *
	     * The advantage of this shortcut is that CompileCommandTokens()
	     * can be written with an assumption that parse.numWords > 0, with
	     * the implication the CCT() always generates bytecode.
	     */
	    continue;
	}

	lastCmdIdx = CompileCommandTokens(interp, &parse, envPtr);

	/*
	 * TIP #280: Track lines in the just compiled command.
	 */

	TclAdvanceLines(&envPtr->line, parse.commandStart, p);
	TclAdvanceContinuations(&envPtr->line, &envPtr->clNext,
		p - envPtr->source);
	Tcl_FreeParse(&parse);
    }

    if (lastCmdIdx == -1) {
	/*
	 * Compiling the script yielded no bytecode.  The script must be all
	 * whitespace, comments, and empty commands.  Such scripts are defined
	 * to successfully produce the empty string result, so we emit the
	 * simple bytecode that makes that happen.
	 */

	PushStringLiteral(envPtr, "");
    } else {
	/*
	 * We compiled at least one command to bytecode.  The routine
	 * CompileCommandTokens() follows the bytecode of each compiled
	 * command with an INST_POP, so that stack balance is maintained when
	 * several commands are in sequence.  (The result of each command is
	 * thrown away before moving on to the next command).  For the last
	 * command compiled, we need to undo that INST_POP so that the result
	 * of the last command becomes the result of the script.  The code
	 * here removes that trailing INST_POP.
	 */

	envPtr->cmdMapPtr[lastCmdIdx].numCodeBytes--;
	envPtr->codeNext--;
	envPtr->currStackDepth++;
    }
}

/*

	/*
	 * Multiple tokens or the single token involves substitutions. Emit
	 * instructions to invoke the eval command procedure at runtime on the
	 * result of evaluating the tokens.
	 */

	TclCompileTokens(interp, tokenPtr, count, envPtr);
	TclEmitInvoke(envPtr, INST_EVAL_STK);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TclCompileExprWords --

}

/*
 * ---------------------------------------------------------------------
 *
 * TclCleanupStackForBreakContinue --
 *
 *	Ditch the extra elements from the auxiliary stack and the main stack.
 *	How to do this exactly depends on whether there are any elements on
 *	the auxiliary stack to pop.
 *
 * ---------------------------------------------------------------------
 */

void
TclCleanupStackForBreakContinue(
    CompileEnv *envPtr,
    ExceptionAux *auxPtr)
{
    int savedStackDepth = envPtr->currStackDepth;
    int toPop = envPtr->expandCount - auxPtr->expandTarget;

    if (toPop > 0) {
	while (toPop --> 0) {
	    TclEmitOpcode(INST_EXPAND_DROP, envPtr);

	}
	TclAdjustStackDepth(auxPtr->expandTargetDepth - envPtr->currStackDepth,
		envPtr);
	envPtr->currStackDepth = auxPtr->expandTargetDepth;



    }

    toPop = envPtr->currStackDepth - auxPtr->stackDepth;
    while (toPop --> 0) {
	TclEmitOpcode(INST_POP, envPtr);


    }
    envPtr->currStackDepth = savedStackDepth;
}

/*
 * ---------------------------------------------------------------------
 *

		auxPtr->continueTargets[i] += 3;
	    }
	}
    }

    return 1;			/* the jump was grown */
}

/*
 *----------------------------------------------------------------------
 *
 * TclEmitInvoke --
 *
 *	Emit one of the invoke-related instructions, wrapping it if necessary
 *	in code that ensures that any break or continue operation passing
 *	through it gets the stack unwinding correct, converting it into an
 *	internal jump if in an appropriate context.
 *
 * Results:
 *	None
 *
 * Side effects:
 *	Issues the jump with all correct stack management. May create another
 *	loop exception range; pointers to ExceptionRange and ExceptionAux
 *	structures should not be held across this call.
 *
 *----------------------------------------------------------------------
 */

void
TclEmitInvoke(
    CompileEnv *envPtr,
    int opcode,
    ...)
{
    va_list argList;
    ExceptionRange *rangePtr;
    ExceptionAux *auxBreakPtr, *auxContinuePtr;
    int arg1, arg2, wordCount = 0, expandCount = 0;
    int loopRange = 0, breakRange = 0, continueRange = 0;

    /*
     * Parse the arguments.
     */

    va_start(argList, opcode);
    switch (opcode) {
    case INST_INVOKE_STK1:
	wordCount = arg1 = va_arg(argList, int);
	arg2 = 0;
	break;
    case INST_INVOKE_STK4:
	wordCount = arg1 = va_arg(argList, int);
	arg2 = 0;
	break;
    case INST_INVOKE_REPLACE:
	arg1 = va_arg(argList, int);
	arg2 = va_arg(argList, int);
	wordCount = arg1 + arg2 - 1;
	break;
    default:
	Tcl_Panic("unexpected opcode");
    case INST_EVAL_STK:
	wordCount = 1;
	arg1 = arg2 = 0;
	break;
    case INST_RETURN_STK:
	wordCount = 2;
	arg1 = arg2 = 0;
	break;
    case INST_INVOKE_EXPANDED:
	wordCount = arg1 = va_arg(argList, int);
	arg2 = 0;
	expandCount = 1;
	break;
    }
    va_end(argList);

    /*
     * Determine if we need to handle break and continue exceptions with a
     * special handling exception range (so that we can correctly unwind the
     * stack).
     *
     * These must be done separately; they can be different (especially for
     * calls from inside a [for] increment clause).
     */

    rangePtr = TclGetInnermostExceptionRange(envPtr, TCL_BREAK, &auxBreakPtr);
    if (rangePtr == NULL || rangePtr->type != LOOP_EXCEPTION_RANGE) {
	auxBreakPtr = NULL;
    } else if (auxBreakPtr->stackDepth == envPtr->currStackDepth-wordCount
	    && auxBreakPtr->expandTarget == envPtr->expandCount-expandCount) {
	auxBreakPtr = NULL;
    } else {
	breakRange = auxBreakPtr - envPtr->exceptAuxArrayPtr;
    }

    rangePtr = TclGetInnermostExceptionRange(envPtr, TCL_CONTINUE,
	    &auxContinuePtr);
    if (rangePtr == NULL || rangePtr->type != LOOP_EXCEPTION_RANGE) {
	auxContinuePtr = NULL;
    } else if (auxContinuePtr->stackDepth == envPtr->currStackDepth-wordCount
	    && auxContinuePtr->expandTarget == envPtr->expandCount-expandCount) {
	auxContinuePtr = NULL;
    } else {
	continueRange = auxBreakPtr - envPtr->exceptAuxArrayPtr;
    }

    if (auxBreakPtr != NULL || auxContinuePtr != NULL) {
	loopRange = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr);
	ExceptionRangeStarts(envPtr, loopRange);
    }

    /*
     * Issue the invoke itself.
     */

    switch (opcode) {
    case INST_INVOKE_STK1:
	TclEmitInstInt1(INST_INVOKE_STK1, arg1, envPtr);
	break;
    case INST_INVOKE_STK4:
	TclEmitInstInt4(INST_INVOKE_STK4, arg1, envPtr);
	break;
    case INST_INVOKE_EXPANDED:
	TclEmitOpcode(INST_INVOKE_EXPANDED, envPtr);
	envPtr->expandCount--;
	TclAdjustStackDepth(1 - arg1, envPtr);
	break;
    case INST_EVAL_STK:
	TclEmitOpcode(INST_EVAL_STK, envPtr);
	break;
    case INST_RETURN_STK:
	TclEmitOpcode(INST_RETURN_STK, envPtr);
	break;
    case INST_INVOKE_REPLACE:
	TclEmitInstInt4(INST_INVOKE_REPLACE, arg1, envPtr);
	TclEmitInt1(arg2, envPtr);
	TclAdjustStackDepth(-1, envPtr); /* Correction to stack depth calcs */
	break;
    }

    /*
     * If we're generating a special wrapper exception range, we need to
     * finish that up now.
     */

    if (auxBreakPtr != NULL || auxContinuePtr != NULL) {
	int savedStackDepth = envPtr->currStackDepth;
	int savedExpandCount = envPtr->expandCount;
	JumpFixup nonTrapFixup;

	if (auxBreakPtr != NULL) {
	    auxBreakPtr = envPtr->exceptAuxArrayPtr + breakRange;
	}
	if (auxContinuePtr != NULL) {
	    auxContinuePtr = envPtr->exceptAuxArrayPtr + continueRange;
	}

	ExceptionRangeEnds(envPtr, loopRange);
	TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, &nonTrapFixup);

	/*
	 * Careful! When generating these stack unwinding sequences, the depth
	 * of stack in the cases where they are taken is not the same as if
	 * the exception is not taken.
	 */

	if (auxBreakPtr != NULL) {
	    TclAdjustStackDepth(-1, envPtr);

	    ExceptionRangeTarget(envPtr, loopRange, breakOffset);
	    TclCleanupStackForBreakContinue(envPtr, auxBreakPtr);
	    TclAddLoopBreakFixup(envPtr, auxBreakPtr);

	    envPtr->currStackDepth = savedStackDepth;
	    envPtr->expandCount = savedExpandCount;
	}

	if (auxContinuePtr != NULL) {
	    TclAdjustStackDepth(-1, envPtr);

	    ExceptionRangeTarget(envPtr, loopRange, continueOffset);
	    TclCleanupStackForBreakContinue(envPtr, auxContinuePtr);
	    TclAddLoopContinueFixup(envPtr, auxContinuePtr);

	    envPtr->currStackDepth = savedStackDepth;
	    envPtr->expandCount = savedExpandCount;
	}

	TclFinalizeLoopExceptionRange(envPtr, loopRange);
	TclFixupForwardJumpToHere(envPtr, &nonTrapFixup, 127);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TclGetInstructionTable --
 *
 *	Returns a pointer to the table describing Tcl bytecode instructions.

			    Namespace *nsPtr, int flags,
			    LiteralEntry **globalPtrPtr);
MODULE_SCOPE void	TclDeleteExecEnv(ExecEnv *eePtr);
MODULE_SCOPE void	TclDeleteLiteralTable(Tcl_Interp *interp,
			    LiteralTable *tablePtr);
MODULE_SCOPE void	TclEmitForwardJump(CompileEnv *envPtr,
			    TclJumpType jumpType, JumpFixup *jumpFixupPtr);
MODULE_SCOPE void	TclEmitInvoke(CompileEnv *envPtr, int opcode, ...);
MODULE_SCOPE ExceptionRange * TclGetExceptionRangeForPc(unsigned char *pc,
			    int catchOnly, ByteCode *codePtr);
MODULE_SCOPE void	TclExpandJumpFixupArray(JumpFixupArray *fixupArrayPtr);
MODULE_SCOPE int	TclNRExecuteByteCode(Tcl_Interp *interp,
			    ByteCode *codePtr);
MODULE_SCOPE Tcl_Obj *	TclFetchLiteral(CompileEnv *envPtr, unsigned int index);
MODULE_SCOPE void	TclFinalizeAuxDataTypeTable(void);

    TclEmitPush(cmdLit, envPtr);
    TclDecrRefCount(objPtr);

    /*
     * Do the replacing dispatch.
     */

    TclEmitInvoke(envPtr, INST_INVOKE_REPLACE, parsePtr->numWords,numWords+1);


}

/*
 * Helpers that do issuing of instructions for commands that "don't have
 * compilers" (well, they do; these). They all work by just generating base
 * code to invoke the command; they're intended for ensemble subcommands so
 * that the costs of INST_INVOKE_REPLACE can be avoided where we can work out

 */

static void
AdvanceJumps(
    CompileEnv *envPtr)
{
    unsigned char *currentInstPtr;
    Tcl_HashTable jumps;

    for (currentInstPtr = envPtr->codeStart ;
	    currentInstPtr < envPtr->codeNext-1 ;
	    currentInstPtr += AddrLength(currentInstPtr)) {
	int offset, delta, isNew;

	switch (*currentInstPtr) {
	case INST_JUMP1:
	case INST_JUMP_TRUE1:
	case INST_JUMP_FALSE1:
	    offset = TclGetInt1AtPtr(currentInstPtr + 1);
	    Tcl_InitHashTable(&jumps, TCL_ONE_WORD_KEYS);
	    for (delta=0 ; offset+delta != 0 ;) {
		if (offset + delta < -128 || offset + delta > 127) {
		    break;
		}
		Tcl_CreateHashEntry(&jumps, INT2PTR(offset), &isNew);
		if (!isNew) {
		    offset = TclGetInt1AtPtr(currentInstPtr + 1);
		    break;
		}
		offset += delta;
		switch (*(currentInstPtr + offset)) {
		case INST_NOP:
		    delta = InstLength(INST_NOP);
		    continue;
		case INST_JUMP1:
		    delta = TclGetInt1AtPtr(currentInstPtr + offset + 1);
		    continue;
		case INST_JUMP4:
		    delta = TclGetInt4AtPtr(currentInstPtr + offset + 1);
		    continue;
		}
		break;
	    }
	    Tcl_DeleteHashTable(&jumps);
	    TclStoreInt1AtPtr(offset, currentInstPtr + 1);
	    continue;

	case INST_JUMP4:
	case INST_JUMP_TRUE4:
	case INST_JUMP_FALSE4:
	    Tcl_InitHashTable(&jumps, TCL_ONE_WORD_KEYS);
	    Tcl_CreateHashEntry(&jumps, INT2PTR(0), &isNew);
	    for (offset = TclGetInt4AtPtr(currentInstPtr + 1); offset!=0 ;) {
		Tcl_CreateHashEntry(&jumps, INT2PTR(offset), &isNew);
		if (!isNew) {
		    offset = TclGetInt4AtPtr(currentInstPtr + 1);
		    break;
		}
		switch (*(currentInstPtr + offset)) {
		case INST_NOP:
		    offset += InstLength(INST_NOP);
		    continue;
		case INST_JUMP1:
		    offset += TclGetInt1AtPtr(currentInstPtr + offset + 1);
		    continue;
		case INST_JUMP4:
		    offset += TclGetInt4AtPtr(currentInstPtr + offset + 1);
		    continue;
		}
		break;
	    }
	    Tcl_DeleteHashTable(&jumps);
	    TclStoreInt4AtPtr(offset, currentInstPtr + 1);
	    continue;
	}
    }
}

/*

		goto error;
	    }
	    /*
	     * Fall through!
	     */
	case 'd':
	case 'e':
	case 'E':
	case 'f':
	case 'g':
	case 'G':
	case 'i':
	case 'o':
	case 'x':
	case 'X':
	case 'b':
	    break;
	case 'u':
	    if (flags & SCAN_BIG) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj(
			"unsigned bignum scans are invalid", -1));
		Tcl_SetErrorCode(interp, "TCL", "FORMAT", "BADUNSIGNED",NULL);

	    parseFlag |= TCL_PARSE_SCAN_PREFIXES;
	    break;
	case 'o':
	    op = 'i';
	    parseFlag |= TCL_PARSE_OCTAL_ONLY | TCL_PARSE_SCAN_PREFIXES;
	    break;
	case 'x':
	case 'X':
	    op = 'i';
	    parseFlag |= TCL_PARSE_HEXADECIMAL_ONLY;
	    break;
	case 'b':
	    op = 'i';
	    parseFlag |= TCL_PARSE_BINARY_ONLY;
	    break;
	case 'u':
	    op = 'i';
	    parseFlag |= TCL_PARSE_DECIMAL_ONLY;
	    flags |= SCAN_UNSIGNED;
	    break;

	case 'f':
	case 'e':
	case 'E':
	case 'g':
	case 'G':
	    op = 'f';
	    break;

	case 's':
	    op = 's';
	    break;

# http.tcl --
#
#	Client-side HTTP for GET, POST, and HEAD commands. These routines can
#	be used in untrusted code that uses the Safesock security policy.
#	These procedures use a callback interface to avoid using vwait, which
#	is not defined in the safe base.
#
# See the file "license.terms" for information on usage and redistribution of
# this file, and for a DISCLAIMER OF ALL WARRANTIES.

package require Tcl 8.6-
# Keep this in sync with pkgIndex.tcl and with the install directories in
# Makefiles
package provide http 2.8.8

namespace eval http {
    # Allow resourcing to not clobber existing data

    variable http
    if {![info exists http]} {
	array set http {

#     port	Default port for protocol
#     command	Command to use to create socket
# Results:
#     list of port and command that was registered.

proc http::register {proto port command} {
    variable urlTypes
    set urlTypes([string tolower $proto]) [list $port $command]
}

# http::unregister --
#
#     Unregisters URL protocol handler
#
# Arguments:
#     proto	URL protocol prefix, e.g. https
# Results:
#     list of port and command that was unregistered.

proc http::unregister {proto} {
    variable urlTypes
    set lower [string tolower $proto]
    if {![info exists urlTypes($lower)]} {
	return -code error "unsupported url type \"$proto\""
    }
    set old $urlTypes($lower)
    unset urlTypes($lower)
    return $old
}

# http::config --
#
#	See documentation for details.
#

	}
    } else {
	set srvurl /
    }
    if {$proto eq ""} {
	set proto http
    }
    set lower [string tolower $proto]
    if {![info exists urlTypes($lower)]} {
	unset $token
	return -code error "Unsupported URL type \"$proto\""
    }
    set defport [lindex $urlTypes($lower) 0]
    set defcmd [lindex $urlTypes($lower) 1]

    if {$port eq ""} {
	set port $defport
    }
    if {![catch {$http(-proxyfilter) $host} proxy]} {
	set phost [lindex $proxy 0]
	set pport [lindex $proxy 1]

    # Set back the variables needed here
    set sock $state(sock)
    set isQueryChannel [info exists state(-querychannel)]
    set isQuery [info exists state(-query)]
    set host [lindex [split $state(socketinfo) :] 0]
    set port [lindex [split $state(socketinfo) :] 1]

    set lower [string tolower $proto]
    set defport [lindex $urlTypes($lower) 0]

    # Send data in cr-lf format, but accept any line terminators

    fconfigure $sock -translation {auto crlf} -buffersize $state(-blocksize)

    # The following is disallowed in safe interpreters, but the socket is
    # already in non-blocking mode in that case.

if {![package vsatisfies [package provide Tcl] 8.6-]} {return}
package ifneeded http 2.8.8 [list tclPkgSetup $dir http 2.8.8 {{http.tcl source {::http::config ::http::formatQuery ::http::geturl ::http::reset ::http::wait ::http::register ::http::unregister ::http::mapReply}}}]

    foo destroy
} -match glob -result *

test compile-19.0 {Bug 3614102: reset stack housekeeping} -body {
    # This will panic in a --enable-symbols=compile build, unless bug is fixed.
    apply {{} {list [if 1]}}
} -returnCodes error -match glob -result *

test compile-20.1 {ensure there are no infinite loops in optimizing} {
    tcl::unsupported::disassemble script {
	while 1 {
	    return -code continue -level 0
	}
    }
    return
} {}
test compile-20.2 {ensure there are no infinite loops in optimizing} {
    tcl::unsupported::disassemble script {
	while 1 {
	    while 1 {
		return -code break -level 0
	    }
	}
    }
    return
} {}

test compile-21.1 {stack balance management} {
    apply {{} {
	set result {}
	while 1 {
	    lappend result a
	    lappend result [list b [break]]
	    lappend result c
	}
	return $result
    }}
} a
test compile-21.2 {stack balance management} {
    apply {{} {
	set result {}
	while {[incr i] <= 10} {
	    lappend result $i
	    lappend result [list b [continue] c]
	    lappend result c
	}
	return $result
    }}
} {1 2 3 4 5 6 7 8 9 10}
test compile-21.3 {stack balance management} {
    apply {args {
	set result {}
	while 1 {
	    lappend result a
	    lappend result [concat {*}$args [break]]
	    lappend result c
	}
	return $result
    }} P Q R S T
} a
test compile-21.4 {stack balance management} {
    apply {args {
	set result {}
	while {[incr i] <= 10} {
	    lappend result $i
	    lappend result [concat {*}$args [continue] c]
	    lappend result c
	}
	return $result
    }} P Q R S T
} {1 2 3 4 5 6 7 8 9 10}

# TODO sometime - check that bytecode from tbcload is *not* disassembled.

# cleanup
catch {rename p ""}
catch {namespace delete test_ns_compile}
catch {unset x}

		puts [puts {*}$l {*}[puts a b c {*}$l {*}[continue] d e f]]
	    }]
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }}
} 0
test for-7.9 {Bug 3614226: ensure that break from invoked command cleans up the stack} memory {
    apply {{} {
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {$x < 5} {incr x} {
		list a b c [apply {{} {return -code break}}] d e f
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }}
} 0
test for-7.10 {Bug 3614226: ensure that continue from invoked command cleans up the stack} memory {
    apply {{} {
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {$x < 5} {incr x} {
		list a b c [apply {{} {return -code continue}}] d e f
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }}
} 0
test for-7.11 {Bug 3614226: ensure that break from invoked command cleans up the expansion stack} memory {
    apply {{} {
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {[incr x]<50} {} {
		puts {*}[puts a b c {*}[apply {{} {return -code break}}] d e f]
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }}
} 0
test for-7.12 {Bug 3614226: ensure that continue from invoked command cleans up the expansion stack} memory {
    apply {{} {
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {[incr x]<50} {} {
		puts {*}[puts a b c {*}[apply {{} {
		    return -code continue
		}}] d e f]
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }}
} 0
test for-7.13 {Bug 3614226: ensure that break from invoked command cleans up the combination of main and expansion stack} memory {
    apply {{} {
	set l [lrepeat 50 p q r]
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {[incr x]<50} {} {
		puts [puts {*}$l {*}[puts a b c {*}$l {*}[apply {{} {
		    return -code break
		}}] d e f]]
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }}
} 0
test for-7.14 {Bug 3614226: ensure that continue from invoked command cleans up the combination of main and expansion stack} memory {
    apply {{} {
	set l [lrepeat 50 p q r]
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {[incr x]<50} {} {
		puts [puts {*}$l {*}[puts a b c {*}$l {*}[apply {{} {
		    return -code continue
		}}] d e f]]
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }}
} 0
test for-7.15 {Bug 3614226: ensure that break from invoked command only cleans up the right amount} memory {
    apply {{} {
	set l [lrepeat 50 p q r]
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    unset -nocomplain {*}[for {set x 0} {[incr x]<50} {} {
		puts [puts {*}$l {*}[puts a b c {*}$l {*}[apply {{} {
		    return -code break
		}}] d e f]]
	    }]
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }}
} 0
test for-7.16 {Bug 3614226: ensure that continue from invoked command only cleans up the right amount} memory {
    apply {{} {
	set l [lrepeat 50 p q r]
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    unset -nocomplain {*}[for {set x 0} {[incr x]<50} {} {
		puts [puts {*}$l {*}[puts a b c {*}$l {*}[apply {{} {
		    return -code continue
		}}] d e f]]
	    }]
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }}
} 0
test for-7.17 {Bug 3614226: ensure that break from expanded command cleans up the stack} memory {
    apply {op {
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {$x < 5} {incr x} {
		list a b c [{*}$op] d e f
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }} {return -level 0 -code break}
} 0
test for-7.18 {Bug 3614226: ensure that continue from expanded command cleans up the stack} memory {
    apply {op {
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {$x < 5} {incr x} {
		list a b c [{*}$op] d e f
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }} {return -level 0 -code continue}
} 0
test for-7.19 {Bug 3614226: ensure that break from expanded command cleans up the expansion stack} memory {
    apply {op {
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {[incr x]<50} {} {
		puts {*}[puts a b c {*}[{*}$op] d e f]
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }} {return -level 0 -code break}
} 0
test for-7.20 {Bug 3614226: ensure that continue from expanded command cleans up the expansion stack} memory {
    apply {op {
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {[incr x]<50} {} {
		puts {*}[puts a b c {*}[{*}$op] d e f]
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }} {return -level 0 -code continue}
} 0
test for-7.21 {Bug 3614226: ensure that break from expanded command cleans up the combination of main and expansion stack} memory {
    apply {op {
	set l [lrepeat 50 p q r]
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {[incr x]<50} {} {
		puts [puts {*}$l {*}[puts a b c {*}$l {*}[{*}$op] d e f]]
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }} {return -level 0 -code break}
} 0
test for-7.22 {Bug 3614226: ensure that continue from expanded command cleans up the combination of main and expansion stack} memory {
    apply {op {
	set l [lrepeat 50 p q r]
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    for {set x 0} {[incr x]<50} {} {
		puts [puts {*}$l {*}[puts a b c {*}$l {*}[{*}$op] d e f]]
	    }
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }} {return -level 0 -code continue}
} 0
test for-7.23 {Bug 3614226: ensure that break from expanded command only cleans up the right amount} memory {
    apply {op {
	set l [lrepeat 50 p q r]
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    unset -nocomplain {*}[for {set x 0} {[incr x]<50} {} {
		puts [puts {*}$l {*}[puts a b c {*}$l {*}[{*}$op] d e f]]
	    }]
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }} {return -level 0 -code break}
} 0
test for-7.24 {Bug 3614226: ensure that continue from expanded command only cleans up the right amount} memory {
    apply {op {
	set l [lrepeat 50 p q r]
	# Can't use [memtest]; must be careful when we change stack frames
	set end [meminfo]
	for {set i 0} {$i < 5} {incr i} {
	    unset -nocomplain {*}[for {set x 0} {[incr x]<50} {} {
		puts [puts {*}$l {*}[puts a b c {*}$l {*}[{*}$op] d e f]]
	    }]
	    set tmp $end
	    set end [meminfo]
	}
	expr {$end - $tmp}
    }} {return -level 0 -code continue}
} 0

# cleanup
::tcltest::cleanupTests
return

# Local Variables:

test http-3.1 {http::geturl} -returnCodes error -body {
    http::geturl -bogus flag
} -result {Unknown option flag, can be: -binary, -blocksize, -channel, -command, -handler, -headers, -keepalive, -method, -myaddr, -progress, -protocol, -query, -queryblocksize, -querychannel, -queryprogress, -strict, -timeout, -type, -validate}
test http-3.2 {http::geturl} -returnCodes error -body {
    http::geturl http:junk
} -result {Unsupported URL: http:junk}
set url //[info hostname]:$port
set badurl //[info hostname]:[expr $port+1]
test http-3.3 {http::geturl} -body {
    set token [http::geturl $url]
    http::data $token
} -cleanup {
    http::cleanup $token
} -result "<html><head><title>HTTP/1.0 TEST</title></head><body>
<h1>Hello, World!</h1>
<h2>GET /</h2>
</body></html>"
set tail /a/b/c
set url //[info hostname]:$port/a/b/c
set fullurl HTTP://user:pass@[info hostname]:$port/a/b/c
set binurl //[info hostname]:$port/binary
set posturl //[info hostname]:$port/post
set badposturl //[info hostname]:$port/droppost
set authorityurl //[info hostname]:$port
set ipv6url http://\[::1\]:$port/
test http-3.4 {http::geturl} -body {
    set token [http::geturl $url]

} -result {1 def}
test scan-4.48 {Tcl_ScanObjCmd, float scanning} {
    list [scan {1 2 3} {%e %f %g} x y z] $x $y $z
} {3 1.0 2.0 3.0}
test scan-4.49 {Tcl_ScanObjCmd, float scanning} {
    list [scan {.1 0.2 3.} {%e %f %g} x y z] $x $y $z
} {3 0.1 0.2 3.0}
test scan-4.49-uc-1 {Tcl_ScanObjCmd, float scanning} {
    list [scan {0.5*0.75} {%E%c%G} x y z] $x $y $z
} {3 0.5 42 0.75}
test scan-4.49-uc-2 {Tcl_ScanObjCmd, float scanning} {
    list [scan {5e-1*75E-2} {%E%c%G} x y z] $x $y $z
} {3 0.5 42 0.75}
test scan-4.50 {Tcl_ScanObjCmd, float scanning} {
    list [scan {1234567890a} %f x] $x
} {1 1234567890.0}
test scan-4.51 {Tcl_ScanObjCmd, float scanning} {
    list [scan {+123+45} %f x] $x
} {1 123.0}
test scan-4.52 {Tcl_ScanObjCmd, float scanning} {

} {3 1 1 1}
test scan-4.63 {scanning of large and negative hex integers} {
    lassign [int_range] MIN_INT MAX_INT
    set scanstring [format {%x %x %x} -1 $MIN_INT $MAX_INT]
    list [scan $scanstring {%x %x %x} a b c] \
	[expr { $a == -1 }] [expr { $b == $MIN_INT }] [expr { $c == $MAX_INT }]
} {3 1 1 1}
test scan-4.64 {scanning of hex with %X} {
    scan "123 abc f78" %X%X%X
} {291 2748 3960}

test scan-5.1 {integer scanning} -setup {
    set a {}; set b {}; set c {}; set d {}
} -body {
    list [scan "-20 1476 \n33 0" "%d %d %d %d" a b c d] $a $b $c $d
} -result {4 -20 1476 33 0}
test scan-5.2 {integer scanning} -setup {

test scan-8.3 {error conditions} -returnCodes error -body {
    scan a %D x
} -result {bad scan conversion character "D"}
test scan-8.4 {error conditions} -returnCodes error -body {
    scan a %O x
} -result {bad scan conversion character "O"}
test scan-8.5 {error conditions} -returnCodes error -body {
    scan a %B x
} -result {bad scan conversion character "B"}
test scan-8.6 {error conditions} -returnCodes error -body {
    scan a %F x
} -result {bad scan conversion character "F"}
test scan-8.7 {error conditions} -returnCodes error -body {
    scan a %p x
} -result {bad scan conversion character "p"}
test scan-8.8 {error conditions} -returnCodes error -body {
    scan a "%d %d" a
} -result {different numbers of variable names and field specifiers}
test scan-8.9 {error conditions} -returnCodes error -body {
    scan a "%d %d" a b c
} -result {variable is not assigned by any conversion specifiers}
test scan-8.10 {error conditions} -setup {

	    $(INSTALL_DATA) $$i "$(SCRIPT_INSTALL_DIR)"; \
	    done;
	@echo "Installing package http1.0 files to $(SCRIPT_INSTALL_DIR)/http1.0/";
	@for i in $(TOP_DIR)/library/http1.0/*.tcl ; \
	    do \
	    $(INSTALL_DATA) $$i "$(SCRIPT_INSTALL_DIR)"/http1.0; \
	    done;
	@echo "Installing package http 2.8.8 as a Tcl Module";
	@$(INSTALL_DATA) $(TOP_DIR)/library/http/http.tcl "$(SCRIPT_INSTALL_DIR)"/../tcl8/8.6/http-2.8.8.tm;
	@echo "Installing package opt0.4 files to $(SCRIPT_INSTALL_DIR)/opt0.4/";
	@for i in $(TOP_DIR)/library/opt/*.tcl ; \
	    do \
	    $(INSTALL_DATA) $$i "$(SCRIPT_INSTALL_DIR)"/opt0.4; \
	    done;
	@echo "Installing package msgcat 1.5.2 as a Tcl Module";
	@$(INSTALL_DATA) $(TOP_DIR)/library/msgcat/msgcat.tcl "$(SCRIPT_INSTALL_DIR)"/../tcl8/8.5/msgcat-1.5.2.tm;

	    $(COPY) "$$i" "$(SCRIPT_INSTALL_DIR)"; \
	    done;
	@echo "Installing library http1.0 directory";
	@for j in $(ROOT_DIR)/library/http1.0/*.tcl; \
	    do \
	    $(COPY) "$$j" "$(SCRIPT_INSTALL_DIR)/http1.0"; \
	    done;
	@echo "Installing package http 2.8.8 as a Tcl Module";
	@$(COPY) $(ROOT_DIR)/library/http/http.tcl $(SCRIPT_INSTALL_DIR)/../tcl8/8.6/http-2.8.8.tm;
	@echo "Installing library opt0.4 directory";
	@for j in $(ROOT_DIR)/library/opt/*.tcl; \
	    do \
	    $(COPY) "$$j" "$(SCRIPT_INSTALL_DIR)/opt0.4"; \
	    done;
	@echo "Installing package msgcat 1.5.2 as a Tcl Module";
	@$(COPY) $(ROOT_DIR)/library/msgcat/msgcat.tcl $(SCRIPT_INSTALL_DIR)/../tcl8/8.5/msgcat-1.5.2.tm;