/*
* Expand the macro whose name is np, at token trp->tp, in the tokenrow.
* Return trp->tp at the first token next to be expanded
* (ordinarily the beginning of the expansion)
*/
void
expand(Tokenrow *trp, Nlist *np)
{
Tokenrow ntr;
int ntokc, narg, i;
Token *tp;
int hs;
#ifdef __ORCAC__
Tokenrow **atr;
atr = domalloc(sizeof(Tokenrow *) * (NARG+1));
#define RETURN free(atr);return
#else
Tokenrow *atr[NARG+1];
#define RETURN return;
#endif
copytokenrow(&ntr, np->vp); /* copy macro value */
if (np->ap==NULL) /* parameterless */
ntokc = 1;
else {
ntokc = gatherargs(trp, atr, &narg);
if (narg<0) { /* not actually a call (no '(') */
trp->tp++;
RETURN;
}
if (narg != rowlen(np->ap)) {
error(ERROR, "Disagreement in number of macro arguments");
trp->tp->hideset = newhideset(trp->tp->hideset, np);
trp->tp += ntokc;
RETURN;
}
substargs(np, &ntr, atr); /* put args into replacement */
for (i=0; i<narg; i++) {
dofree(atr[i]->bp);
dofree(atr[i]);
}
}
doconcat(&ntr); /* execute ## operators */
hs = newhideset(trp->tp->hideset, np);
for (tp=ntr.bp; tp<ntr.lp; tp++) { /* distribute hidesets */
if (tp->type==NAME) {
if (tp->hideset==0)
tp->hideset = hs;
else
tp->hideset = unionhideset(tp->hideset, hs);
}
}
ntr.tp = ntr.bp;
insertrow(trp, ntokc, &ntr);
trp->tp -= rowlen(&ntr);
dofree(ntr.bp);
RETURN;
}
/*
* Expand the macro whose name is np, at token trp->tp, in the tokenrow.
* Return trp->tp at the first token next to be expanded
* (ordinarily the beginning of the expansion)
*/
void
expand(Tokenrow *trp, Nlist *np)
{
Tokenrow ntr;
int ntokc, narg, i;
Token *tp;
Tokenrow *atr[NARG+1];
int hs;
copytokenrow(&ntr, np->vp); /* copy macro value */
if (np->ap==NULL) /* parameterless */
ntokc = 1;
else {
ntokc = gatherargs(trp, atr, &narg);
if (narg<0) { /* not actually a call (no '(') */
/* gatherargs has already pushed trp->tr to the next token */
return;
}
if (narg != rowlen(np->ap)) {
error(ERROR, "Disagreement in number of macro arguments");
trp->tp->hideset = newhideset(trp->tp->hideset, np);
trp->tp += ntokc;
return;
}
substargs(np, &ntr, atr); /* put args into replacement */
for (i=0; i<narg; i++) {
dofree(atr[i]->bp);
dofree(atr[i]);
}
}
doconcat(&ntr); /* execute ## operators */
hs = newhideset(trp->tp->hideset, np);
for (tp=ntr.bp; tp<ntr.lp; tp++) { /* distribute hidesets */
if (tp->type==NAME) {
if (tp->hideset==0)
tp->hideset = hs;
else
tp->hideset = unionhideset(tp->hideset, hs);
}
}
ntr.tp = ntr.bp;
insertrow(trp, ntokc, &ntr);
trp->tp -= rowlen(&ntr);
dofree(ntr.bp);
return;
}
/*
* Evaluate the ## operators in a tokenrow
*/
void
doconcat(Tokenrow * trp)
{
Token *ltp, *ntp;
Tokenrow ntr;
size_t len;
for (trp->tp = trp->bp; trp->tp < trp->lp; trp->tp++)
{
if (trp->tp->type == DSHARP1)
trp->tp->type = DSHARP;
else
if (trp->tp->type == DSHARP)
{
int i;
char tt[NCONCAT];
ltp = trp->tp - 1;
ntp = trp->tp + 1;
if (ltp < trp->bp || ntp >= trp->lp)
{
error(ERROR, "## occurs at border of replacement");
continue;
}
ntp = ltp;
i = 1;
len = 0;
do
{
if (len + ntp->len + ntp->wslen > sizeof(tt))
{
error(ERROR, "## string concatination buffer overrun");
break;
}
if (ntp != trp->tp + 1)
{
strncpy((char *) tt + len, (char *) ntp->t - ntp->wslen,
ntp->len + ntp->wslen);
len += ntp->len + ntp->wslen;
}
else // Leerzeichen um ## herum entfernen:
{
strncpy((char *) tt + len, (char *) ntp->t, ntp->len);
len += ntp->len;
}
ntp = trp->tp + i;
i++;
}
while (ntp < trp->lp);
tt[len] = '\0';
setsource("<##>", -1, -1, tt, 0);
maketokenrow(3, &ntr);
gettokens(&ntr, 1);
unsetsource();
if (ntr.bp->type == UNCLASS)
error(WARNING, "Bad token %r produced by ##", &ntr);
while ((ntr.lp-1)->len == 0 && ntr.lp != ntr.bp)
ntr.lp--;
doconcat(&ntr);
trp->tp = ltp;
makespace(&ntr, ltp);
insertrow(trp, (int)(ntp - ltp), &ntr);
dofree(ntr.bp);
trp->tp--;
}
}
}
/*
* Expand the macro whose name is np, at token trp->tp, in the tokenrow.
* Return trp->tp at the first token next to be expanded
* (ordinarily the beginning of the expansion)
* I.e.: the same position as before!
* Only one expansion is performed, then we return to the expandrow()
* loop and start at same position.
*/
void
expand(Tokenrow * trp, Nlist * np, MacroValidatorList * pValidators)
{
Tokenrow ntr;
int ntokc, narg;
Tokenrow *atr[NARG + 1];
if (Mflag == 2)
{
if (np->ap)
error(INFO, "Macro expansion of %t with %s(%r)", trp->tp, np->name, np->ap);
else
error(INFO, "Macro expansion of %t with %s", trp->tp, np->name);
}
copytokenrow(&ntr, np->vp); /* copy macro value */
if (np->ap == NULL) /* parameterless */
ntokc = 1;
else
{
int i;
ntokc = gatherargs(trp, atr, &narg);
if (narg < 0)
{ /* not actually a call (no '(') */
trp->tp++;
return;
}
if (narg != rowlen(np->ap))
{
error(ERROR, "Disagreement in number of macro arguments");
trp->tp += ntokc;
return;
}
/** If gatherargs passed a macro validating token, this token
must become valid here.
trp->tp+0 was checked in expandrow(), so we don't need to do it
again here:
*/
for (i = 1; i < ntokc; i++)
{
mvl_check(pValidators,trp->tp+i);
}
substargs(np, &ntr, atr); /* put args into replacement */
for (i = 0; i < narg; i++)
{
dofree(atr[i]->bp);
dofree(atr[i]);
}
}
doconcat(&ntr); /* execute ## operators */
ntr.tp = ntr.bp;
makespace(&ntr, trp->tp);
tokenrow_zeroTokenIdentifiers(&ntr);
insertrow(trp, ntokc, &ntr);
/* add validator for just invalidated macro:
*/
np->flag |= ISACTIVE;
if (trp->tp != trp->lp)
{ /* tp is a valid pointer: */
mvl_add(pValidators,np,trp->tp);
}
else
{ /* tp is == lp, therefore does not point to valid memory: */
mvl_add(pValidators,np,0);
}
/* reset trp->tp to original position:
*/
trp->tp -= ntr.lp - ntr.bp; /* so the result will be tested for macros from the same position again */
dofree(ntr.bp);
return;
}
