shithub: 9ficl

ref: 67757267d0b9c6b15a0f9a87abab74ab152d9b09
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/*******************************************************************
** t o o l s . c
** Forth Inspired Command Language - programming tools
** Author: John Sadler ([email protected])
** Created: 20 June 2000
** $Id: tools.c,v 1.16 2010/12/02 22:14:12 asau Exp $
*******************************************************************/
/*
** Copyright (c) 1997-2001 John Sadler ([email protected])
** All rights reserved.
**
** Get the latest Ficl release at http://ficl.sourceforge.net
**
** I am interested in hearing from anyone who uses Ficl. If you have
** a problem, a success story, a defect, an enhancement request, or
** if you would like to contribute to the Ficl release, please
** contact me by email at the address above.
**
** L I C E N S E  and  D I S C L A I M E R
** 
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
** SUCH DAMAGE.
*/

/*
** NOTES:
** SEE needs information about the addresses of functions that
** are the CFAs of colon definitions, constants, variables, DOES>
** words, and so on. It gets this information from a table and supporting
** functions in words.c.
** fiColonParen fiDoDoes createParen fiVariableParen fiUserParen fiConstantParen
**
** Step and break debugger for Ficl
** debug  ( xt -- )   Start debugging an xt
** Set a breakpoint
** Specify breakpoint default action
*/

#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>          /* sprintf */
#include <string.h>
#include <ctype.h>
#include "ficl.h"


static void ficlPrimitiveStepIn(ficlVm *vm);
static void ficlPrimitiveStepOver(ficlVm *vm);
static void ficlPrimitiveStepBreak(ficlVm *vm);



void ficlCallbackAssert(ficlCallback *callback, int expression, char *expressionString, char *filename, int line)
#if FICL_ROBUST >= 1
{
	if (!expression)
	{
		static char buffer[256];
		sprintf(buffer, "ASSERTION FAILED at %s:%d: \"%s\"\n", filename, line, expressionString);
		ficlCallbackTextOut(callback, buffer);
		exit(-1);
	}
}
#else /* FICL_ROBUST >= 1 */
{
	FICL_IGNORE(callback);
	FICL_IGNORE(expression);
	FICL_IGNORE(expressionString);
	FICL_IGNORE(filename);
	FICL_IGNORE(line);
}
#endif /* FICL_ROBUST >= 1 */



/**************************************************************************
                        v m S e t B r e a k
** Set a breakpoint at the current value of IP by
** storing that address in a BREAKPOINT record
**************************************************************************/
static void ficlVmSetBreak(ficlVm *vm, ficlBreakpoint *pBP)
{
    ficlWord *pStep = ficlSystemLookup(vm->callback.system, "step-break");
    FICL_VM_ASSERT(vm, pStep);

    pBP->address = vm->ip;
    pBP->oldXT = *vm->ip;
    *vm->ip = pStep;
}


/**************************************************************************
**                      d e b u g P r o m p t
**************************************************************************/
static void ficlDebugPrompt(ficlVm *vm)
{
    ficlVmTextOut(vm, "dbg> ");
}


#if 0
static int isPrimitive(ficlWord *word)
{
    ficlWordKind wk = ficlWordClassify(word);
    return ((wk != COLON) && (wk != DOES));
}
#endif


/**************************************************************************
                        d i c t H a s h S u m m a r y
** Calculate a figure of merit for the dictionary hash table based
** on the average search depth for all the words in the dictionary,
** assuming uniform distribution of target keys. The figure of merit
** is the ratio of the total search depth for all keys in the table
** versus a theoretical optimum that would be achieved if the keys
** were distributed into the table as evenly as possible. 
** The figure would be worse if the hash table used an open
** addressing scheme (i.e. collisions resolved by searching the
** table for an empty slot) for a given size table.
**************************************************************************/
#if FICL_WANT_FLOAT
void ficlPrimitiveHashSummary(ficlVm *vm)
{
    ficlDictionary *dictionary = ficlVmGetDictionary(vm);
    ficlHash *pFHash;
    ficlWord **hash;
    unsigned size;
    ficlWord *word;
    unsigned i;
    int nMax = 0;
    int nWords = 0;
    int nFilled;
    double avg = 0.0;
    double best;
    int nAvg, nRem, nDepth;

    FICL_VM_DICTIONARY_CHECK(vm, dictionary, 0);

    pFHash = dictionary->wordlists[dictionary->wordlistCount - 1];
    hash  = pFHash->table;
    size   = pFHash->size;
    nFilled = size;

    for (i = 0; i < size; i++)
    {
        int n = 0;
        word = hash[i];

        while (word)
        {
            ++n;
            ++nWords;
            word = word->link;
        }

        avg += (double)(n * (n+1)) / 2.0;

        if (n > nMax)
            nMax = n;
        if (n == 0)
            --nFilled;
    }

    /* Calc actual avg search depth for this hash */
    avg = avg / nWords;

    /* Calc best possible performance with this size hash */
    nAvg = nWords / size;
    nRem = nWords % size;
    nDepth = size * (nAvg * (nAvg+1))/2 + (nAvg+1)*nRem;
    best = (double)nDepth/nWords;

    sprintf(vm->pad, 
        "%d bins, %2.0f%% filled, Depth: Max=%d, Avg=%2.1f, Best=%2.1f, Score: %2.0f%%\n", 
        size,
        (double)nFilled * 100.0 / size, nMax,
        avg, 
        best,
        100.0 * best / avg);

    ficlVmTextOut(vm, vm->pad);

    return;
}
#endif

/*
** Here's the outer part of the decompiler. It's 
** just a big nested conditional that checks the
** CFA of the word to decompile for each kind of
** known word-builder code, and tries to do 
** something appropriate. If the CFA is not recognized,
** just indicate that it is a primitive.
*/
static void ficlPrimitiveSeeXT(ficlVm *vm)
{
    ficlWord *word;
    ficlWordKind kind;

    word = (ficlWord *)ficlStackPopPointer(vm->dataStack);
    kind = ficlWordClassify(word);

    switch (kind)
    {
    case FICL_WORDKIND_COLON:
        sprintf(vm->pad, ": %.*s\n", word->length, word->name);
        ficlVmTextOut(vm, vm->pad);
        ficlDictionarySee(ficlVmGetDictionary(vm), word, &(vm->callback));
        break;

    case FICL_WORDKIND_DOES:
        ficlVmTextOut(vm, "does>\n");
        ficlDictionarySee(ficlVmGetDictionary(vm), (ficlWord *)word->param->p, &(vm->callback));
        break;

    case FICL_WORDKIND_CREATE:
        ficlVmTextOut(vm, "create\n");
        break;

    case FICL_WORDKIND_VARIABLE:
        sprintf(vm->pad, "variable = %ld (%#lx)\n", word->param->i, word->param->u);
        ficlVmTextOut(vm, vm->pad);
        break;

#if FICL_WANT_USER
    case FICL_WORDKIND_USER:
        sprintf(vm->pad, "user variable %ld (%#lx)\n", word->param->i, word->param->u);
        ficlVmTextOut(vm, vm->pad);
        break;
#endif

    case FICL_WORDKIND_CONSTANT:
        sprintf(vm->pad, "constant = %ld (%#lx)\n", word->param->i, word->param->u);
        ficlVmTextOut(vm, vm->pad);
		break;

    case FICL_WORDKIND_2CONSTANT:
        sprintf(vm->pad, "constant = %ld %ld (%#lx %#lx)\n", word->param[1].i, word->param->i, word->param[1].u, word->param->u);
        ficlVmTextOut(vm, vm->pad);
		break;

    default:
        sprintf(vm->pad, "%.*s is a primitive\n", word->length, word->name);
        ficlVmTextOut(vm, vm->pad);
        break;
    }

    if (word->flags & FICL_WORD_IMMEDIATE)
    {
        ficlVmTextOut(vm, "immediate\n");
    }

    if (word->flags & FICL_WORD_COMPILE_ONLY)
    {
        ficlVmTextOut(vm, "compile-only\n");
    }

    return;
}


static void ficlPrimitiveSee(ficlVm *vm)
{
    ficlPrimitiveTick(vm);
    ficlPrimitiveSeeXT(vm);
    return;
}


/**************************************************************************
                        f i c l D e b u g X T
** debug  ( xt -- )
** Given an xt of a colon definition or a word defined by DOES>, set the
** VM up to debug the word: push IP, set the xt as the next thing to execute,
** set a breakpoint at its first instruction, and run to the breakpoint.
** Note: the semantics of this word are equivalent to "step in"
**************************************************************************/
static void ficlPrimitiveDebugXT(ficlVm *vm)
{
    ficlWord *xt    = (ficlWord*)ficlStackPopPointer(vm->dataStack);
    ficlWordKind   wk    = ficlWordClassify(xt);

    ficlStackPushPointer(vm->dataStack, xt);
    ficlPrimitiveSeeXT(vm);

    switch (wk)
    {
    case FICL_WORDKIND_COLON:
    case FICL_WORDKIND_DOES:
        /*
        ** Run the colon code and set a breakpoint at the next instruction
        */
        ficlVmExecuteWord(vm, xt);
        ficlVmSetBreak(vm, &(vm->callback.system->breakpoint));
        break;

    default:
        ficlVmExecuteWord(vm, xt);
        break;
    }

    return;
}


/**************************************************************************
                        s t e p I n
** Ficl 
** Execute the next instruction, stepping into it if it's a colon definition 
** or a does> word. This is the easy kind of step.
**************************************************************************/
static void ficlPrimitiveStepIn(ficlVm *vm)
{
    /*
    ** Do one step of the inner loop
    */
	ficlVmExecuteWord(vm, *vm->ip++);

    /*
    ** Now set a breakpoint at the next instruction
    */
    ficlVmSetBreak(vm, &(vm->callback.system->breakpoint));
    
    return;
}


/**************************************************************************
                        s t e p O v e r
** Ficl 
** Execute the next instruction atomically. This requires some insight into 
** the memory layout of compiled code. Set a breakpoint at the next instruction
** in this word, and run until we hit it
**************************************************************************/
static void ficlPrimitiveStepOver(ficlVm *vm)
{
    ficlWord *word;
    ficlWordKind kind;
    ficlWord *pStep = ficlSystemLookup(vm->callback.system, "step-break");
    FICL_VM_ASSERT(vm, pStep);

    word = *vm->ip;
    kind = ficlWordClassify(word);

    switch (kind)
    {
    case FICL_WORDKIND_COLON: 
    case FICL_WORDKIND_DOES:
        /*
        ** assume that the next ficlCell holds an instruction 
        ** set a breakpoint there and return to the inner interpreter
        */
        vm->callback.system->breakpoint.address = vm->ip + 1;
        vm->callback.system->breakpoint.oldXT =  vm->ip[1];
        vm->ip[1] = pStep;
        break;

    default:
        ficlPrimitiveStepIn(vm);
        break;
    }

    return;
}


/**************************************************************************
                        s t e p - b r e a k
** Ficl
** Handles breakpoints for stepped execution.
** Upon entry, breakpoint contains the address and replaced instruction
** of the current breakpoint.
** Clear the breakpoint
** Get a command from the console. 
** i (step in) - execute the current instruction and set a new breakpoint 
**    at the IP
** o (step over) - execute the current instruction to completion and set
**    a new breakpoint at the IP
** g (go) - execute the current instruction and exit
** q (quit) - abort current word
** b (toggle breakpoint)
**************************************************************************/

extern char *ficlDictionaryInstructionNames[];

static void ficlPrimitiveStepBreak(ficlVm *vm)
{
    ficlString command;
    ficlWord *word;
    ficlWord *pOnStep;
    ficlWordKind kind;

    if (!vm->restart)
    {
        FICL_VM_ASSERT(vm, vm->callback.system->breakpoint.address);
        FICL_VM_ASSERT(vm, vm->callback.system->breakpoint.oldXT);
        /*
        ** Clear the breakpoint that caused me to run
        ** Restore the original instruction at the breakpoint, 
        ** and restore the IP
        */
        vm->ip = (ficlIp)(vm->callback.system->breakpoint.address);
        *vm->ip = vm->callback.system->breakpoint.oldXT;

        /*
        ** If there's an onStep, do it
        */
        pOnStep = ficlSystemLookup(vm->callback.system, "on-step");
        if (pOnStep)
            ficlVmExecuteXT(vm, pOnStep);

        /*
        ** Print the name of the next instruction
        */
        word = vm->callback.system->breakpoint.oldXT;

        kind = ficlWordClassify(word);

        switch (kind)
        {
			case FICL_WORDKIND_INSTRUCTION:
			case FICL_WORDKIND_INSTRUCTION_WITH_ARGUMENT:
				sprintf(vm->pad, "next: %s (instruction %ld)\n", ficlDictionaryInstructionNames[(long)word], (long)word);
				break;
			default:
				sprintf(vm->pad, "next: %s\n", word->name);
				break;
		}

        ficlVmTextOut(vm, vm->pad);
        ficlDebugPrompt(vm);
    }
    else
    {
        vm->restart = 0;
    }

    command = ficlVmGetWord(vm);

	switch (command.text[0])
	{
		case 'i':
		    ficlPrimitiveStepIn(vm);
			break;

		case 'o':
		    ficlPrimitiveStepOver(vm);
			break;

		case 'g':
			break;

		case 'l':
		{
			ficlWord *xt;
			xt = ficlDictionaryFindEnclosingWord(ficlVmGetDictionary(vm), (ficlCell *)(vm->ip));
			if (xt)
			{
				ficlStackPushPointer(vm->dataStack, xt);
				ficlPrimitiveSeeXT(vm);
			}
			else
			{
				ficlVmTextOut(vm, "sorry - can't do that\n");
			}
			ficlVmThrow(vm, FICL_VM_STATUS_RESTART);
			break;
		}

		case 'q':
		{
			ficlVmTextOut(vm, FICL_PROMPT);
			ficlVmThrow(vm, FICL_VM_STATUS_ABORT);
			break;
		}

		case 'x':
		{
			/*
			** Take whatever's left in the TIB and feed it to a subordinate ficlVmExecuteString
			*/ 
			int returnValue;
			ficlString s;
			ficlWord *oldRunningWord = vm->runningWord;

			FICL_STRING_SET_POINTER(s, vm->tib.text + vm->tib.index);
			FICL_STRING_SET_LENGTH(s, vm->tib.end - FICL_STRING_GET_POINTER(s));

			returnValue = ficlVmExecuteString(vm, s);

			if (returnValue == FICL_VM_STATUS_OUT_OF_TEXT)
			{
				returnValue = FICL_VM_STATUS_RESTART;
				vm->runningWord = oldRunningWord;
				ficlVmTextOut(vm, "\n");
			}

			ficlVmThrow(vm, returnValue);
			break;
		}

		default:
		{
			ficlVmTextOut(vm,
				"i -- step In\n"
				"o -- step Over\n"
				"g -- Go (execute to completion)\n"
				"l -- List source code\n"
				"q -- Quit (stop debugging and abort)\n"
				"x -- eXecute the rest of the line as Ficl words\n"
			);
			ficlDebugPrompt(vm);
			ficlVmThrow(vm, FICL_VM_STATUS_RESTART);
			break;
		}
	}

    return;
}


/**************************************************************************
                        b y e
** TOOLS
** Signal the system to shut down - this causes ficlExec to return
** VM_USEREXIT. The rest is up to you.
**************************************************************************/
static void ficlPrimitiveBye(ficlVm *vm)
{
    ficlVmThrow(vm, FICL_VM_STATUS_USER_EXIT);
    return;
}


/**************************************************************************
                        d i s p l a y S t a c k
** TOOLS 
** Display the parameter stack (code for ".s")
**************************************************************************/

struct stackContext
{
    ficlVm *vm;
	ficlDictionary *dictionary;
    int count;
};

static ficlInteger ficlStackDisplayCallback(void *c, ficlCell *cell)
{
    struct stackContext *context = (struct stackContext *)c;
    char buffer[64];
    sprintf(buffer, "[0x%08jx %3d]: %12jd (0x%08jx)\n", (uintmax_t)cell, context->count++, (intmax_t)cell->i, (uintmax_t)cell->i);
	ficlVmTextOut(context->vm, buffer);
	return FICL_TRUE;
}

void ficlStackDisplay(ficlStack *stack, ficlStackWalkFunction callback, void *context)
{
	ficlVm *vm = stack->vm;
	char buffer[128];
	struct stackContext myContext;

    FICL_STACK_CHECK(stack, 0, 0);

	sprintf(buffer, "[%s stack has %d entries, top at 0x%08jx]\n", stack->name, ficlStackDepth(stack), (uintmax_t)stack->top);
	ficlVmTextOut(vm, buffer);

    if (callback == NULL)
    {
        myContext.vm = vm;
	    myContext.count = 0;
		context = &myContext;
		callback = ficlStackDisplayCallback;
    }
	ficlStackWalk(stack, callback, context, FICL_FALSE);

	sprintf(buffer, "[%s stack base at 0x%08jx]\n", stack->name, (uintmax_t)stack->base);
	ficlVmTextOut(vm, buffer);

    return;
}


void ficlVmDisplayDataStack(ficlVm *vm)
{
    ficlStackDisplay(vm->dataStack, NULL, NULL);
    return;
}




static ficlInteger ficlStackDisplaySimpleCallback(void *c, ficlCell *cell)
{
    struct stackContext *context = (struct stackContext *)c;
    char buffer[32];
    sprintf(buffer, "%s%jd", context->count ? " " : "", (intmax_t)cell->i);
    context->count++;
    ficlVmTextOut(context->vm, buffer);
	return FICL_TRUE;
}


void ficlVmDisplayDataStackSimple(ficlVm *vm)
{
    ficlStack *stack = vm->dataStack;
    char buffer[32];
    struct stackContext context;

    FICL_STACK_CHECK(stack, 0, 0);

    sprintf(buffer, "[%d] ", ficlStackDepth(stack));
    ficlVmTextOut(vm, buffer);

    context.vm = vm;
    context.count = 0;
    ficlStackWalk(stack, ficlStackDisplaySimpleCallback, &context, FICL_TRUE);
    return;
}




static ficlInteger ficlReturnStackDisplayCallback(void *c, ficlCell *cell)
{
    struct stackContext *context = (struct stackContext *)c;
    char buffer[128];

    sprintf(buffer, "[0x%08jx %3d] %12jd (0x%08jx)", (uintmax_t)cell, context->count++, (intmax_t)cell->i, (uintmax_t)cell->i);

    /*
    ** Attempt to find the word that contains the return
    ** stack address (as if it is part of a colon definition).
    ** If this works, also print the name of the word.
    */
    if (ficlDictionaryIncludes(context->dictionary, cell->p))
    {
        ficlWord *word = ficlDictionaryFindEnclosingWord(context->dictionary, (ficlCell*)cell->p);
        if (word)
        {
            int offset = (ficlCell *)cell->p - &word->param[0];
            sprintf(buffer + strlen(buffer), ", %s + %d ", word->name, offset);
        }
    }
	strcat(buffer, "\n");
    ficlVmTextOut(context->vm, buffer);
	return FICL_TRUE;
}


void ficlVmDisplayReturnStack(ficlVm *vm)
{
    struct stackContext context;
	context.vm = vm;
	context.count = 0;
	context.dictionary = ficlVmGetDictionary(vm);
    ficlStackDisplay(vm->returnStack, ficlReturnStackDisplayCallback, &context);
    return;
}




/**************************************************************************
                        f o r g e t - w i d
** 
**************************************************************************/
static void ficlPrimitiveForgetWid(ficlVm *vm)
{
    ficlDictionary *dictionary = ficlVmGetDictionary(vm);
    ficlHash *hash;

    hash = (ficlHash *)ficlStackPopPointer(vm->dataStack);
    ficlHashForget(hash, dictionary->here);

    return;
}


/**************************************************************************
                        f o r g e t
** TOOLS EXT  ( "<spaces>name" -- )
** Skip leading space delimiters. Parse name delimited by a space.
** Find name, then delete name from the dictionary along with all
** words added to the dictionary after name. An ambiguous
** condition exists if name cannot be found. 
** 
** If the Search-Order word set is present, FORGET searches the
** compilation word list. An ambiguous condition exists if the
** compilation word list is deleted. 
**************************************************************************/
static void ficlPrimitiveForget(ficlVm *vm)
{
    void *where;
    ficlDictionary *dictionary = ficlVmGetDictionary(vm);
    ficlHash *hash = dictionary->compilationWordlist;

    ficlPrimitiveTick(vm);
    where = ((ficlWord *)ficlStackPopPointer(vm->dataStack))->name;
    ficlHashForget(hash, where);
    dictionary->here = FICL_POINTER_TO_CELL(where);

    return;
}


/**************************************************************************
                        w o r d s
** 
**************************************************************************/
#define nCOLWIDTH 8
static void ficlPrimitiveWords(ficlVm *vm)
{
    ficlDictionary *dictionary = ficlVmGetDictionary(vm);
    ficlHash *hash = dictionary->wordlists[dictionary->wordlistCount - 1];
    ficlWord *wp;
    int nChars = 0;
    int len;
    unsigned i;
    int nWords = 0;
    char *cp;
    char *pPad = vm->pad;

    for (i = 0; i < hash->size; i++)
    {
        for (wp = hash->table[i]; wp != NULL; wp = wp->link, nWords++)
        {
            if (wp->length == 0) /* ignore :noname defs */
                continue;

            cp = wp->name;
            nChars += sprintf(pPad + nChars, "%s", cp);

            if (nChars > 70)
            {
                pPad[nChars++] = '\n';
                pPad[nChars] = '\0';
                nChars = 0;
                ficlVmTextOut(vm, pPad);
            }
            else
            {
                len = nCOLWIDTH - nChars % nCOLWIDTH;
                while (len-- > 0)
                    pPad[nChars++] = ' ';
            }

            if (nChars > 70)
            {
                pPad[nChars++] = '\n';
                pPad[nChars] = '\0';
                nChars = 0;
                ficlVmTextOut(vm, pPad);
            }
        }
    }

    if (nChars > 0)
    {
        pPad[nChars++] = '\n';
        pPad[nChars] = '\0';
        nChars = 0;
        ficlVmTextOut(vm, pPad);
    }

    sprintf(vm->pad, "Dictionary: %d words, %ld cells used of %u total\n", 
        nWords, (long) (dictionary->here - dictionary->base), dictionary->size);
    ficlVmTextOut(vm, vm->pad);
    return;
}


/**************************************************************************
                        l i s t E n v
** Print symbols defined in the environment 
**************************************************************************/
static void ficlPrimitiveListEnv(ficlVm *vm)
{
    ficlDictionary *dictionary = vm->callback.system->environment;
    ficlHash *hash = dictionary->forthWordlist;
    ficlWord *word;
    unsigned i;
    int counter = 0;

    for (i = 0; i < hash->size; i++)
    {
        for (word = hash->table[i]; word != NULL; word = word->link, counter++)
        {
            ficlVmTextOut(vm, word->name);
            ficlVmTextOut(vm, "\n");
        }
    }

    sprintf(vm->pad, "Environment: %d words, %ld cells used of %u total\n", 
        counter, (long) (dictionary->here - dictionary->base), dictionary->size);
    ficlVmTextOut(vm, vm->pad);
    return;
}




/*
** This word lists the parse steps in order
*/
void ficlPrimitiveParseStepList(ficlVm *vm)
{
    int i;
    ficlSystem *system = vm->callback.system;
    FICL_VM_ASSERT(vm, system);

    ficlVmTextOut(vm, "Parse steps:\n");
    ficlVmTextOut(vm, "lookup\n");

    for (i = 0; i < FICL_MAX_PARSE_STEPS; i++)
    {
        if (system->parseList[i] != NULL)
        {
            ficlVmTextOut(vm, system->parseList[i]->name);
            ficlVmTextOut(vm, "\n");
        }
        else break;
    }
    return;
}


/**************************************************************************
                        e n v C o n s t a n t
** Ficl interface to ficlSystemSetEnvironment and ficlSetEnvD - allow Ficl code to set
** environment constants...
**************************************************************************/
static void ficlPrimitiveEnvConstant(ficlVm *vm)
{
    unsigned value;
    FICL_STACK_CHECK(vm->dataStack, 1, 0);

    ficlVmGetWordToPad(vm);
    value = ficlStackPopUnsigned(vm->dataStack);
    ficlDictionarySetConstant(ficlSystemGetEnvironment(vm->callback.system), vm->pad, (ficlUnsigned)value);
    return;
}

static void ficlPrimitiveEnv2Constant(ficlVm *vm)
{
    ficl2Integer value;

    FICL_STACK_CHECK(vm->dataStack, 2, 0);

    ficlVmGetWordToPad(vm);
    value = ficlStackPop2Integer(vm->dataStack);
    ficlDictionarySet2Constant(ficlSystemGetEnvironment(vm->callback.system), vm->pad, value);
    return;
}


/**************************************************************************
                        f i c l C o m p i l e T o o l s
** Builds wordset for debugger and TOOLS optional word set
**************************************************************************/

void ficlSystemCompileTools(ficlSystem *system)
{
    ficlDictionary *dictionary = ficlSystemGetDictionary(system);
    ficlDictionary *environment = ficlSystemGetEnvironment(system);

    FICL_SYSTEM_ASSERT(system, dictionary);
    FICL_SYSTEM_ASSERT(system, environment);


    /*
    ** TOOLS and TOOLS EXT
    */
    ficlDictionarySetPrimitive(dictionary, ".s",        ficlVmDisplayDataStack,  FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, ".s-simple", ficlVmDisplayDataStackSimple,  FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, "bye",       ficlPrimitiveBye,            FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, "forget",    ficlPrimitiveForget,         FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, "see",       ficlPrimitiveSee,            FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, "words",     ficlPrimitiveWords,      FICL_WORD_DEFAULT);

    /*
    ** Set TOOLS environment query values
    */
    ficlDictionarySetConstant(environment, "tools",            FICL_TRUE);
    ficlDictionarySetConstant(environment, "tools-ext",        FICL_FALSE);

    /*
    ** Ficl extras
    */
    ficlDictionarySetPrimitive(dictionary, "r.s",       ficlVmDisplayReturnStack,  FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, ".env",      ficlPrimitiveListEnv,        FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, "env-constant",
                                    ficlPrimitiveEnvConstant,    FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, "env-2constant",
                                    ficlPrimitiveEnv2Constant,   FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, "debug-xt",  ficlPrimitiveDebugXT,    FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, "parse-order", ficlPrimitiveParseStepList, FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, "step-break",ficlPrimitiveStepBreak,      FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, "forget-wid",ficlPrimitiveForgetWid,      FICL_WORD_DEFAULT);
    ficlDictionarySetPrimitive(dictionary, "see-xt",    ficlPrimitiveSeeXT,          FICL_WORD_DEFAULT);

#if FICL_WANT_FLOAT
    ficlDictionarySetPrimitive(dictionary, ".hash",     ficlPrimitiveHashSummary,FICL_WORD_DEFAULT);
#endif

    return;
}