/**************************************************************************
d i c t C h e c k
** Checks the dictionary for corruption and throws appropriate
** errors.
** Input: +n number of ADDRESS UNITS (not Cells) proposed to allot
** -n number of ADDRESS UNITS proposed to de-allot
** 0 just do a consistency check
**************************************************************************/
void dictCheck(FICL_DICT *pDict, FICL_VM *pVM, int n)
{
if ((n >= 0) && (dictCellsAvail(pDict) * (int)sizeof(CELL) < n))
{
vmThrowErr(pVM, "Error: dictionary full");
}
if ((n <= 0) && (dictCellsUsed(pDict) * (int)sizeof(CELL) < -n))
{
vmThrowErr(pVM, "Error: dictionary underflow");
}
if (pDict->nLists > FICL_DEFAULT_VOCS)
{
dictResetSearchOrder(pDict);
vmThrowErr(pVM, "Error: search order overflow");
}
else if (pDict->nLists < 0)
{
dictResetSearchOrder(pDict);
vmThrowErr(pVM, "Error: search order underflow");
}
return;
}
/**************************************************************************
d i c t A l l o t
** Allocate or remove n chars of dictionary space, with
** checks for underrun and overrun
**************************************************************************/
int dictAllot(FICL_DICT *pDict, int n)
{
char *cp = (char *)pDict->here;
#if FICL_ROBUST
if (n > 0)
{
if ((unsigned)n <= dictCellsAvail(pDict) * sizeof (CELL))
cp += n;
else
return 1; /* dict is full */
}
else
{
n = -n;
if ((unsigned)n <= dictCellsUsed(pDict) * sizeof (CELL))
cp -= n;
else /* prevent underflow */
cp -= dictCellsUsed(pDict) * sizeof (CELL);
}
#else
cp += n;
#endif
pDict->here = PTRtoCELL cp;
return 0;
}
void dictCheckThreshold(FICL_DICT* dp)
{
if( dictCellsAvail(dp) < dictThreshold.u ) {
dp->dict = ficlMalloc( dictIncrease.u * sizeof (CELL) );
assert(dp->dict);
dp->here = dp->dict;
dp->size = dictIncrease.u;
dictAlign(dp);
}
}
/**************************************************************************
f i c l B u i l d
** Builds a word into the dictionary.
** Preconditions: system must be initialized, and there must
** be enough space for the new word's header! Operation is
** controlled by ficlLockDictionary, so any initialization
** required by your version of the function (if you overrode
** it) must be complete at this point.
** Parameters:
** name -- duh, the name of the word
** code -- code to execute when the word is invoked - must take a single param
** pointer to a FICL_VM
** flags -- 0 or more of F_IMMEDIATE, F_COMPILE, use bitwise OR!
**
**************************************************************************/
int ficlBuild(FICL_SYSTEM *pSys, char *name, FICL_CODE code, char flags)
{
#if FICL_MULTITHREAD
int err = ficlLockDictionary(TRUE);
if (err) return err;
#endif /* FICL_MULTITHREAD */
assert(dictCellsAvail(pSys->dp) > sizeof (FICL_WORD) / sizeof (CELL));
dictAppendWord(pSys->dp, name, code, flags);
ficlLockDictionary(FALSE);
return 0;
}
/**************************************************************************
d i c t A l l o t C e l l s
** Reserve space for the requested number of cells in the
** dictionary. If nCells < 0 , removes space from the dictionary.
**************************************************************************/
int dictAllotCells(FICL_DICT *pDict, int nCells)
{
#if FICL_ROBUST
if (nCells > 0)
{
if (nCells <= dictCellsAvail(pDict))
pDict->here += nCells;
else
return 1; /* dict is full */
}
else
{
nCells = -nCells;
if (nCells <= dictCellsUsed(pDict))
pDict->here -= nCells;
else /* prevent underflow */
pDict->here -= dictCellsUsed(pDict);
}
#else
pDict->here += nCells;
#endif
return 0;
}
static void freeHeap(FICL_VM *pVM)
{
stackPushINT(pVM->pStack, dictCellsAvail(ficlGetDict(pVM->pSys)));
}