Tcl Source Code

static void		PrintDictUpdateInfo(ClientData clientData,
			    Tcl_Obj *appendObj, ByteCode *codePtr,
			    unsigned int pcOffset);
static ClientData	DupForeachInfo(ClientData clientData);
static void		FreeForeachInfo(ClientData clientData);
static void		PrintForeachInfo(ClientData clientData,
			    Tcl_Obj *appendObj, ByteCode *codePtr,
			    unsigned int pcOffset);
static void		PrintNewForeachInfo(ClientData clientData,
			    Tcl_Obj *appendObj, ByteCode *codePtr,
			    unsigned int pcOffset);
static int		CompileEachloopCmd(Tcl_Interp *interp,
			    Tcl_Parse *parsePtr, Command *cmdPtr,
			    CompileEnv *envPtr, int collect);
static int		CompileDictEachCmd(Tcl_Interp *interp,
			    Tcl_Parse *parsePtr, Command *cmdPtr,
			    struct CompileEnv *envPtr, int collect);

/*
 * The structures below define the AuxData types defined in this file.
 */

const AuxDataType tclForeachInfoType = {
    "ForeachInfo",		/* name */
    DupForeachInfo,		/* dupProc */
    FreeForeachInfo,		/* freeProc */
    PrintForeachInfo		/* printProc */
};

const AuxDataType tclNewForeachInfoType = {
    "NewForeachInfo",		/* name */
    DupForeachInfo,		/* dupProc */
    FreeForeachInfo,		/* freeProc */
    PrintNewForeachInfo		/* printProc */
};

const AuxDataType tclDictUpdateInfoType = {
    "DictUpdateInfo",		/* name */
    DupDictUpdateInfo,		/* dupProc */
    FreeDictUpdateInfo,		/* freeProc */
    PrintDictUpdateInfo		/* printProc */
};

	    int nameChars = strlen(varName);

	    varListPtr->varIndexes[j] = TclFindCompiledLocal(varName,
		    nameChars, /*create*/ 1, envPtr);
	}
	infoPtr->varLists[loopIndex] = varListPtr;
    }
    infoIndex = TclCreateAuxData(infoPtr, &tclNewForeachInfoType, envPtr);

    /*
     * Evaluate each value list and leave it on stack.
     */

    for (i = 0, tokenPtr = parsePtr->tokenPtr;
	    i < numWords-1;

	}
	Tcl_AppendPrintfToObj(appendObj, "\n\t\t it%%v%u\t[",
		(unsigned) (infoPtr->firstValueTemp + i));
	varsPtr = infoPtr->varLists[i];
	for (j=0 ; j<varsPtr->numVars ; j++) {
	    if (j) {
		Tcl_AppendToObj(appendObj, ", ", -1);
	    }
	    Tcl_AppendPrintfToObj(appendObj, "%%v%u",
		    (unsigned) varsPtr->varIndexes[j]);
	}
	Tcl_AppendToObj(appendObj, "]", -1);
    }
}

static void
PrintNewForeachInfo(
    ClientData clientData,
    Tcl_Obj *appendObj,
    ByteCode *codePtr,
    unsigned int pcOffset)
{
    register ForeachInfo *infoPtr = clientData;
    register ForeachVarList *varsPtr;
    int i, j;

    Tcl_AppendPrintfToObj(appendObj, "jumpOffset=%+d, vars=",
	    infoPtr->loopCtTemp);
    for (i=0 ; i<infoPtr->numLists ; i++) {
	if (i) {
	    Tcl_AppendToObj(appendObj, ",", -1);
	}
	Tcl_AppendToObj(appendObj, "[", -1);
	varsPtr = infoPtr->varLists[i];
	for (j=0 ; j<varsPtr->numVars ; j++) {
	    if (j) {
		Tcl_AppendToObj(appendObj, ",", -1);
	    }
	    Tcl_AppendPrintfToObj(appendObj, "%%v%u",
		    (unsigned) varsPtr->varIndexes[j]);
	}
	Tcl_AppendToObj(appendObj, "]", -1);
    }
}

				 * structures describing each var list. The
				 * actual size of this field will be large
				 * enough to numVars indexes. THIS MUST BE THE
				 * LAST FIELD IN THE STRUCTURE! */
} ForeachInfo;

MODULE_SCOPE const AuxDataType tclForeachInfoType;
MODULE_SCOPE const AuxDataType tclNewForeachInfoType;

#define FOREACHINFO(envPtr, index) \
    ((ForeachInfo*)((envPtr)->auxDataArrayPtr[TclGetUInt4AtPtr(index)].clientData))

/*
 * Structure used to hold information about a switch command that is needed
 * during program execution. These structures are stored in CompileEnv and

    case INST_FOREACH_START:
	/*
	 * Initialize the data for the looping construct, pushing the
	 * corresponding Tcl_Objs to the stack.
	 */


	opnd = TclGetUInt4AtPtr(pc+1);
	infoPtr = codePtr->auxDataArrayPtr[opnd].clientData;
	numLists = infoPtr->numLists;

	/*
	 * Compute the number of iterations that will be run: iterMax
	 */

	    }
	    iterTmp = (listLen + (numVars - 1))/numVars;
	    if (iterTmp > iterMax) {
		iterMax = iterTmp;
	    }
	    listTmpDepth--;
	}

	/*
	 * Store the iterNum and iterMax in a single Tcl_Obj; we keep a
	 * nul-string obj with the pointer stored in the ptrValue so that the
	 * thing is properly garbage collected. THIS OBJ MAKES NO SENSE, but
	 * it will never leave this scope and is read-only.
	 */

	TclNewObj(tmpPtr);
	tmpPtr->internalRep.twoIntValue.int1 = 0;
	tmpPtr->internalRep.twoIntValue.int2 = iterMax;
	PUSH_OBJECT(tmpPtr); /* iterCounts object */

	/*
	 * Store a pointer to the ForeachInfo struct; same dirty trick
	 * as above
	 */

	TclNewObj(tmpPtr);
	tmpPtr->internalRep.otherValuePtr = infoPtr;
	PUSH_OBJECT(tmpPtr); /* infoPtr object */

	/*
	 * Jump directly to the INST_FOREACH_STEP instruction; the C code just
	 * falls through.
	 */

	pc += 5 - infoPtr->loopCtTemp;

    case INST_FOREACH_STEP:
	/*
	 * "Step" a foreach loop (i.e., begin its next iteration) by assigning
	 * the next value list element to each loop var.
	 */

	tmpPtr = OBJ_AT_TOS;
	infoPtr = tmpPtr->internalRep.otherValuePtr;
	numLists = infoPtr->numLists;

	tmpPtr = OBJ_AT_DEPTH(1);
	iterNum = tmpPtr->internalRep.twoIntValue.int1;
	iterMax = tmpPtr->internalRep.twoIntValue.int2;

	/*
	 * If some list still has a remaining list element iterate one more
	 * time. Assign to var the next element from its value list.
	 */

	if (iterNum < iterMax) {
	    /*
	     * Set the variables and jump back to run the body
	     */

	    tmpPtr->internalRep.twoIntValue.int1 = iterNum + 1;

	    listTmpDepth = numLists + 1;

	    for (i = 0;  i < numLists;  i++) {
		varListPtr = infoPtr->varLists[i];
		numVars = varListPtr->numVars;

		listPtr = OBJ_AT_DEPTH(listTmpDepth);