* NFA utilities.
* This file is #included by regcomp.c.
*
- * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
- *
+ * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
+ *
* Development of this software was funded, in part, by Cray Research Inc.,
* UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
* Corporation, none of whom are responsible for the results. The author
- * thanks all of them.
- *
+ * thanks all of them.
+ *
* Redistribution and use in source and binary forms -- with or without
* modification -- are permitted for any purpose, provided that
* redistributions in source form retain this entire copyright notice and
* indicate the origin and nature of any modifications.
- *
+ *
* I'd appreciate being given credit for this package in the documentation
* of software which uses it, but that is not a requirement.
- *
+ *
* THIS SOFTWARE IS PROVIDED ``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
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
- * $Header$
*
*
* One or two things that technically ought to be in here
* the color chains.
*/
-#define NISERR() VISERR(nfa->v)
-#define NERR(e) VERR(nfa->v, (e))
+#define NISERR() VISERR(nfa->v)
+#define NERR(e) VERR(nfa->v, (e))
/*
- * newnfa - set up an NFA
+ - newnfa - set up an NFA
+ ^ static struct nfa *newnfa(struct vars *, struct colormap *, struct nfa *);
*/
-static struct nfa * /* the NFA, or NULL */
-newnfa(struct vars * v,
- struct colormap * cm,
- struct nfa * parent) /* NULL if primary NFA */
+static struct nfa * /* the NFA, or NULL */
+newnfa(v, cm, parent)
+struct vars *v;
+struct colormap *cm;
+struct nfa *parent; /* NULL if primary NFA */
{
struct nfa *nfa;
- nfa = (struct nfa *) MALLOC(sizeof(struct nfa));
+ nfa = (struct nfa *)MALLOC(sizeof(struct nfa));
if (nfa == NULL)
return NULL;
nfa->pre = newfstate(nfa, '>'); /* number 1 */
nfa->parent = parent;
- nfa->init = newstate(nfa); /* may become invalid later */
+ nfa->init = newstate(nfa); /* may become invalid later */
nfa->final = newstate(nfa);
- if (ISERR())
- {
+ if (ISERR()) {
freenfa(nfa);
return NULL;
}
newarc(nfa, '$', 1, nfa->final, nfa->post);
newarc(nfa, '$', 0, nfa->final, nfa->post);
- if (ISERR())
- {
+ if (ISERR()) {
freenfa(nfa);
return NULL;
}
}
/*
- * freenfa - free an entire NFA
+ - freenfa - free an entire NFA
+ ^ static VOID freenfa(struct nfa *);
*/
-static void
-freenfa(struct nfa * nfa)
+static VOID
+freenfa(nfa)
+struct nfa *nfa;
{
struct state *s;
- while ((s = nfa->states) != NULL)
- {
- s->nins = s->nouts = 0; /* don't worry about arcs */
+ while ((s = nfa->states) != NULL) {
+ s->nins = s->nouts = 0; /* don't worry about arcs */
freestate(nfa, s);
}
- while ((s = nfa->free) != NULL)
- {
+ while ((s = nfa->free) != NULL) {
nfa->free = s->next;
destroystate(nfa, s);
}
}
/*
- * newstate - allocate an NFA state, with zero flag value
+ - newstate - allocate an NFA state, with zero flag value
+ ^ static struct state *newstate(struct nfa *);
*/
-static struct state * /* NULL on error */
-newstate(struct nfa * nfa)
+static struct state * /* NULL on error */
+newstate(nfa)
+struct nfa *nfa;
{
struct state *s;
- if (nfa->free != NULL)
- {
+ if (nfa->free != NULL) {
s = nfa->free;
nfa->free = s->next;
- }
- else
- {
- s = (struct state *) MALLOC(sizeof(struct state));
- if (s == NULL)
- {
+ } else {
+ s = (struct state *)MALLOC(sizeof(struct state));
+ if (s == NULL) {
NERR(REG_ESPACE);
return NULL;
}
s->outs = NULL;
s->tmp = NULL;
s->next = NULL;
- if (nfa->slast != NULL)
- {
+ if (nfa->slast != NULL) {
assert(nfa->slast->next == NULL);
nfa->slast->next = s;
}
}
/*
- * newfstate - allocate an NFA state with a specified flag value
+ - newfstate - allocate an NFA state with a specified flag value
+ ^ static struct state *newfstate(struct nfa *, int flag);
*/
-static struct state * /* NULL on error */
-newfstate(struct nfa * nfa, int flag)
+static struct state * /* NULL on error */
+newfstate(nfa, flag)
+struct nfa *nfa;
+int flag;
{
struct state *s;
s = newstate(nfa);
if (s != NULL)
- s->flag = (char) flag;
+ s->flag = (char)flag;
return s;
}
/*
- * dropstate - delete a state's inarcs and outarcs and free it
+ - dropstate - delete a state's inarcs and outarcs and free it
+ ^ static VOID dropstate(struct nfa *, struct state *);
*/
-static void
-dropstate(struct nfa * nfa,
- struct state * s)
+static VOID
+dropstate(nfa, s)
+struct nfa *nfa;
+struct state *s;
{
struct arc *a;
}
/*
- * freestate - free a state, which has no in-arcs or out-arcs
+ - freestate - free a state, which has no in-arcs or out-arcs
+ ^ static VOID freestate(struct nfa *, struct state *);
*/
-static void
-freestate(struct nfa * nfa,
- struct state * s)
+static VOID
+freestate(nfa, s)
+struct nfa *nfa;
+struct state *s;
{
assert(s != NULL);
assert(s->nins == 0 && s->nouts == 0);
s->flag = 0;
if (s->next != NULL)
s->next->prev = s->prev;
- else
- {
+ else {
assert(s == nfa->slast);
nfa->slast = s->prev;
}
if (s->prev != NULL)
s->prev->next = s->next;
- else
- {
+ else {
assert(s == nfa->states);
nfa->states = s->next;
}
s->prev = NULL;
- s->next = nfa->free; /* don't delete it, put it on the free
- * list */
+ s->next = nfa->free; /* don't delete it, put it on the free list */
nfa->free = s;
}
/*
- * destroystate - really get rid of an already-freed state
+ - destroystate - really get rid of an already-freed state
+ ^ static VOID destroystate(struct nfa *, struct state *);
*/
-static void
-destroystate(struct nfa * nfa,
- struct state * s)
+static VOID
+destroystate(nfa, s)
+struct nfa *nfa;
+struct state *s;
{
struct arcbatch *ab;
struct arcbatch *abnext;
assert(s->no == FREESTATE);
- for (ab = s->oas.next; ab != NULL; ab = abnext)
- {
+ for (ab = s->oas.next; ab != NULL; ab = abnext) {
abnext = ab->next;
FREE(ab);
}
}
/*
- * newarc - set up a new arc within an NFA
+ - newarc - set up a new arc within an NFA
+ ^ static VOID newarc(struct nfa *, int, pcolor, struct state *,
+ ^ struct state *);
*/
-static void
-newarc(struct nfa * nfa,
- int t,
- pcolor co,
- struct state * from,
- struct state * to)
+static VOID
+newarc(nfa, t, co, from, to)
+struct nfa *nfa;
+int t;
+pcolor co;
+struct state *from;
+struct state *to;
{
struct arc *a;
assert(a != NULL);
a->type = t;
- a->co = (color) co;
+ a->co = (color)co;
a->to = to;
a->from = from;
/*
- * Put the new arc on the beginning, not the end, of the chains. Not
- * only is this easier, it has the very useful side effect that
+ * Put the new arc on the beginning, not the end, of the chains.
+ * Not only is this easier, it has the very useful side effect that
* deleting the most-recently-added arc is the cheapest case rather
* than the most expensive one.
*/
}
/*
- * allocarc - allocate a new out-arc within a state
+ - allocarc - allocate a new out-arc within a state
+ ^ static struct arc *allocarc(struct nfa *, struct state *);
*/
-static struct arc * /* NULL for failure */
-allocarc(struct nfa * nfa,
- struct state * s)
+static struct arc * /* NULL for failure */
+allocarc(nfa, s)
+struct nfa *nfa;
+struct state *s;
{
struct arc *a;
struct arcbatch *new;
- int i;
+ int i;
/* shortcut */
- if (s->free == NULL && s->noas < ABSIZE)
- {
+ if (s->free == NULL && s->noas < ABSIZE) {
a = &s->oas.a[s->noas];
s->noas++;
return a;
}
/* if none at hand, get more */
- if (s->free == NULL)
- {
- new = (struct arcbatch *) MALLOC(sizeof(struct arcbatch));
- if (new == NULL)
- {
+ if (s->free == NULL) {
+ new = (struct arcbatch *)MALLOC(sizeof(struct arcbatch));
+ if (new == NULL) {
NERR(REG_ESPACE);
return NULL;
}
new->next = s->oas.next;
s->oas.next = new;
- for (i = 0; i < ABSIZE; i++)
- {
+ for (i = 0; i < ABSIZE; i++) {
new->a[i].type = 0;
- new->a[i].freechain = &new->a[i + 1];
+ new->a[i].freechain = &new->a[i+1];
}
- new->a[ABSIZE - 1].freechain = NULL;
+ new->a[ABSIZE-1].freechain = NULL;
s->free = &new->a[0];
}
assert(s->free != NULL);
}
/*
- * freearc - free an arc
+ - freearc - free an arc
+ ^ static VOID freearc(struct nfa *, struct arc *);
*/
-static void
-freearc(struct nfa * nfa,
- struct arc * victim)
+static VOID
+freearc(nfa, victim)
+struct nfa *nfa;
+struct arc *victim;
{
struct state *from = victim->from;
struct state *to = victim->to;
assert(from != NULL);
assert(from->outs != NULL);
a = from->outs;
- if (a == victim) /* simple case: first in chain */
+ if (a == victim) /* simple case: first in chain */
from->outs = victim->outchain;
- else
- {
+ else {
for (; a != NULL && a->outchain != victim; a = a->outchain)
continue;
assert(a != NULL);
assert(to != NULL);
assert(to->ins != NULL);
a = to->ins;
- if (a == victim) /* simple case: first in chain */
+ if (a == victim) /* simple case: first in chain */
to->ins = victim->inchain;
- else
- {
+ else {
for (; a != NULL && a->inchain != victim; a = a->inchain)
continue;
assert(a != NULL);
}
/*
- * findarc - find arc, if any, from given source with given type and color
+ - findarc - find arc, if any, from given source with given type and color
* If there is more than one such arc, the result is random.
+ ^ static struct arc *findarc(struct state *, int, pcolor);
*/
static struct arc *
-findarc(struct state * s,
- int type,
- pcolor co)
+findarc(s, type, co)
+struct state *s;
+int type;
+pcolor co;
{
struct arc *a;
}
/*
- * cparc - allocate a new arc within an NFA, copying details from old one
+ - cparc - allocate a new arc within an NFA, copying details from old one
+ ^ static VOID cparc(struct nfa *, struct arc *, struct state *,
+ ^ struct state *);
*/
-static void
-cparc(struct nfa * nfa,
- struct arc * oa,
- struct state * from,
- struct state * to)
+static VOID
+cparc(nfa, oa, from, to)
+struct nfa *nfa;
+struct arc *oa;
+struct state *from;
+struct state *to;
{
newarc(nfa, oa->type, oa->co, from, to);
}
/*
- * moveins - move all in arcs of a state to another state
- *
+ - moveins - move all in arcs of a state to another state
* You might think this could be done better by just updating the
* existing arcs, and you would be right if it weren't for the desire
* for duplicate suppression, which makes it easier to just make new
* ones to exploit the suppression built into newarc.
+ ^ static VOID moveins(struct nfa *, struct state *, struct state *);
*/
-static void
-moveins(struct nfa * nfa,
- struct state * old,
- struct state * new)
+static VOID
+moveins(nfa, old, new)
+struct nfa *nfa;
+struct state *old;
+struct state *new;
{
struct arc *a;
assert(old != new);
- while ((a = old->ins) != NULL)
- {
+ while ((a = old->ins) != NULL) {
cparc(nfa, a, a->from, new);
freearc(nfa, a);
}
}
/*
- * copyins - copy all in arcs of a state to another state
+ - copyins - copy all in arcs of a state to another state
+ ^ static VOID copyins(struct nfa *, struct state *, struct state *);
*/
-static void
-copyins(struct nfa * nfa,
- struct state * old,
- struct state * new)
+static VOID
+copyins(nfa, old, new)
+struct nfa *nfa;
+struct state *old;
+struct state *new;
{
struct arc *a;
}
/*
- * moveouts - move all out arcs of a state to another state
+ - moveouts - move all out arcs of a state to another state
+ ^ static VOID moveouts(struct nfa *, struct state *, struct state *);
*/
-static void
-moveouts(struct nfa * nfa,
- struct state * old,
- struct state * new)
+static VOID
+moveouts(nfa, old, new)
+struct nfa *nfa;
+struct state *old;
+struct state *new;
{
struct arc *a;
assert(old != new);
- while ((a = old->outs) != NULL)
- {
+ while ((a = old->outs) != NULL) {
cparc(nfa, a, new, a->to);
freearc(nfa, a);
}
}
/*
- * copyouts - copy all out arcs of a state to another state
+ - copyouts - copy all out arcs of a state to another state
+ ^ static VOID copyouts(struct nfa *, struct state *, struct state *);
*/
-static void
-copyouts(struct nfa * nfa,
- struct state * old,
- struct state * new)
+static VOID
+copyouts(nfa, old, new)
+struct nfa *nfa;
+struct state *old;
+struct state *new;
{
struct arc *a;
}
/*
- * cloneouts - copy out arcs of a state to another state pair, modifying type
+ - cloneouts - copy out arcs of a state to another state pair, modifying type
+ ^ static VOID cloneouts(struct nfa *, struct state *, struct state *,
+ ^ struct state *, int);
*/
-static void
-cloneouts(struct nfa * nfa,
- struct state * old,
- struct state * from,
- struct state * to,
- int type)
+static VOID
+cloneouts(nfa, old, from, to, type)
+struct nfa *nfa;
+struct state *old;
+struct state *from;
+struct state *to;
+int type;
{
struct arc *a;
}
/*
- * delsub - delete a sub-NFA, updating subre pointers if necessary
- *
+ - delsub - delete a sub-NFA, updating subre pointers if necessary
* This uses a recursive traversal of the sub-NFA, marking already-seen
* states using their tmp pointer.
+ ^ static VOID delsub(struct nfa *, struct state *, struct state *);
*/
-static void
-delsub(struct nfa * nfa,
- struct state * lp, /* the sub-NFA goes from here... */
- struct state * rp) /* ...to here, *not* inclusive */
+static VOID
+delsub(nfa, lp, rp)
+struct nfa *nfa;
+struct state *lp; /* the sub-NFA goes from here... */
+struct state *rp; /* ...to here, *not* inclusive */
{
assert(lp != rp);
- rp->tmp = rp; /* mark end */
+ rp->tmp = rp; /* mark end */
deltraverse(nfa, lp, lp);
assert(lp->nouts == 0 && rp->nins == 0); /* did the job */
- assert(lp->no != FREESTATE && rp->no != FREESTATE); /* no more */
+ assert(lp->no != FREESTATE && rp->no != FREESTATE); /* no more */
- rp->tmp = NULL; /* unmark end */
- lp->tmp = NULL; /* and begin, marked by deltraverse */
+ rp->tmp = NULL; /* unmark end */
+ lp->tmp = NULL; /* and begin, marked by deltraverse */
}
/*
- * deltraverse - the recursive heart of delsub
+ - deltraverse - the recursive heart of delsub
* This routine's basic job is to destroy all out-arcs of the state.
+ ^ static VOID deltraverse(struct nfa *, struct state *, struct state *);
*/
-static void
-deltraverse(struct nfa * nfa,
- struct state * leftend,
- struct state * s)
+static VOID
+deltraverse(nfa, leftend, s)
+struct nfa *nfa;
+struct state *leftend;
+struct state *s;
{
struct arc *a;
struct state *to;
if (s->nouts == 0)
- return; /* nothing to do */
+ return; /* nothing to do */
if (s->tmp != NULL)
- return; /* already in progress */
+ return; /* already in progress */
- s->tmp = s; /* mark as in progress */
+ s->tmp = s; /* mark as in progress */
- while ((a = s->outs) != NULL)
- {
+ while ((a = s->outs) != NULL) {
to = a->to;
deltraverse(nfa, leftend, to);
assert(to->nouts == 0 || to->tmp != NULL);
freearc(nfa, a);
- if (to->nins == 0 && to->tmp == NULL)
- {
+ if (to->nins == 0 && to->tmp == NULL) {
assert(to->nouts == 0);
freestate(nfa, to);
}
}
- assert(s->no != FREESTATE); /* we're still here */
- assert(s == leftend || s->nins != 0); /* and still reachable */
+ assert(s->no != FREESTATE); /* we're still here */
+ assert(s == leftend || s->nins != 0); /* and still reachable */
assert(s->nouts == 0); /* but have no outarcs */
- s->tmp = NULL; /* we're done here */
+ s->tmp = NULL; /* we're done here */
}
/*
- * dupnfa - duplicate sub-NFA
- *
+ - dupnfa - duplicate sub-NFA
* Another recursive traversal, this time using tmp to point to duplicates
* as well as mark already-seen states. (You knew there was a reason why
* it's a state pointer, didn't you? :-))
+ ^ static VOID dupnfa(struct nfa *, struct state *, struct state *,
+ ^ struct state *, struct state *);
*/
-static void
-dupnfa(struct nfa * nfa,
- struct state * start, /* duplicate of subNFA starting here */
- struct state * stop, /* and stopping here */
- struct state * from, /* stringing duplicate from here */
- struct state * to) /* to here */
+static VOID
+dupnfa(nfa, start, stop, from, to)
+struct nfa *nfa;
+struct state *start; /* duplicate of subNFA starting here */
+struct state *stop; /* and stopping here */
+struct state *from; /* stringing duplicate from here */
+struct state *to; /* to here */
{
- if (start == stop)
- {
+ if (start == stop) {
newarc(nfa, EMPTY, 0, from, to);
return;
}
}
/*
- * duptraverse - recursive heart of dupnfa
+ - duptraverse - recursive heart of dupnfa
+ ^ static VOID duptraverse(struct nfa *, struct state *, struct state *);
*/
-static void
-duptraverse(struct nfa * nfa,
- struct state * s,
- struct state * stmp) /* s's duplicate, or NULL */
+static VOID
+duptraverse(nfa, s, stmp)
+struct nfa *nfa;
+struct state *s;
+struct state *stmp; /* s's duplicate, or NULL */
{
struct arc *a;
if (s->tmp != NULL)
- return; /* already done */
+ return; /* already done */
s->tmp = (stmp == NULL) ? newstate(nfa) : stmp;
- if (s->tmp == NULL)
- {
+ if (s->tmp == NULL) {
assert(NISERR());
return;
}
- for (a = s->outs; a != NULL && !NISERR(); a = a->outchain)
- {
- duptraverse(nfa, a->to, (struct state *) NULL);
+ for (a = s->outs; a != NULL && !NISERR(); a = a->outchain) {
+ duptraverse(nfa, a->to, (struct state *)NULL);
assert(a->to->tmp != NULL);
cparc(nfa, a, s->tmp, a->to->tmp);
}
}
/*
- * cleartraverse - recursive cleanup for algorithms that leave tmp ptrs set
+ - cleartraverse - recursive cleanup for algorithms that leave tmp ptrs set
+ ^ static VOID cleartraverse(struct nfa *, struct state *);
*/
-static void
-cleartraverse(struct nfa * nfa,
- struct state * s)
+static VOID
+cleartraverse(nfa, s)
+struct nfa *nfa;
+struct state *s;
{
struct arc *a;
}
/*
- * specialcolors - fill in special colors for an NFA
+ - specialcolors - fill in special colors for an NFA
+ ^ static VOID specialcolors(struct nfa *);
*/
-static void
-specialcolors(struct nfa * nfa)
+static VOID
+specialcolors(nfa)
+struct nfa *nfa;
{
/* false colors for BOS, BOL, EOS, EOL */
- if (nfa->parent == NULL)
- {
+ if (nfa->parent == NULL) {
nfa->bos[0] = pseudocolor(nfa->cm);
nfa->bos[1] = pseudocolor(nfa->cm);
nfa->eos[0] = pseudocolor(nfa->cm);
nfa->eos[1] = pseudocolor(nfa->cm);
- }
- else
- {
+ } else {
assert(nfa->parent->bos[0] != COLORLESS);
nfa->bos[0] = nfa->parent->bos[0];
assert(nfa->parent->bos[1] != COLORLESS);
}
/*
- * optimize - optimize an NFA
+ - optimize - optimize an NFA
+ ^ static long optimize(struct nfa *, FILE *);
*/
-static long /* re_info bits */
-optimize(struct nfa * nfa,
- FILE *f) /* for debug output; NULL none */
+static long /* re_info bits */
+optimize(nfa, f)
+struct nfa *nfa;
+FILE *f; /* for debug output; NULL none */
{
-#ifdef REG_DEBUG
- int verbose = (f != NULL) ? 1 : 0;
+ int verbose = (f != NULL) ? 1 : 0;
if (verbose)
fprintf(f, "\ninitial cleanup:\n");
-#endif
- cleanup(nfa); /* may simplify situation */
-#ifdef REG_DEBUG
+ cleanup(nfa); /* may simplify situation */
if (verbose)
dumpnfa(nfa, f);
if (verbose)
fprintf(f, "\nempties:\n");
-#endif
- fixempties(nfa, f); /* get rid of EMPTY arcs */
-#ifdef REG_DEBUG
+ fixempties(nfa, f); /* get rid of EMPTY arcs */
if (verbose)
fprintf(f, "\nconstraints:\n");
-#endif
- pullback(nfa, f); /* pull back constraints backward */
- pushfwd(nfa, f); /* push fwd constraints forward */
-#ifdef REG_DEBUG
+ pullback(nfa, f); /* pull back constraints backward */
+ pushfwd(nfa, f); /* push fwd constraints forward */
if (verbose)
fprintf(f, "\nfinal cleanup:\n");
-#endif
- cleanup(nfa); /* final tidying */
- return analyze(nfa); /* and analysis */
+ cleanup(nfa); /* final tidying */
+ return analyze(nfa); /* and analysis */
}
/*
- * pullback - pull back constraints backward to (with luck) eliminate them
+ - pullback - pull back constraints backward to (with luck) eliminate them
+ ^ static VOID pullback(struct nfa *, FILE *);
*/
-static void
-pullback(struct nfa * nfa,
- FILE *f) /* for debug output; NULL none */
+static VOID
+pullback(nfa, f)
+struct nfa *nfa;
+FILE *f; /* for debug output; NULL none */
{
struct state *s;
struct state *nexts;
struct arc *a;
struct arc *nexta;
- int progress;
+ int progress;
/* find and pull until there are no more */
- do
- {
+ do {
progress = 0;
- for (s = nfa->states; s != NULL && !NISERR(); s = nexts)
- {
+ for (s = nfa->states; s != NULL && !NISERR(); s = nexts) {
nexts = s->next;
- for (a = s->outs; a != NULL && !NISERR(); a = nexta)
- {
+ for (a = s->outs; a != NULL && !NISERR(); a = nexta) {
nexta = a->outchain;
if (a->type == '^' || a->type == BEHIND)
if (pull(nfa, a))
if (NISERR())
return;
- for (a = nfa->pre->outs; a != NULL; a = nexta)
- {
+ for (a = nfa->pre->outs; a != NULL; a = nexta) {
nexta = a->outchain;
- if (a->type == '^')
- {
+ if (a->type == '^') {
assert(a->co == 0 || a->co == 1);
newarc(nfa, PLAIN, nfa->bos[a->co], a->from, a->to);
freearc(nfa, a);
}
/*
- * pull - pull a back constraint backward past its source state
+ - pull - pull a back constraint backward past its source state
* A significant property of this function is that it deletes at most
* one state -- the constraint's from state -- and only if the constraint
* was that state's last outarc.
+ ^ static int pull(struct nfa *, struct arc *);
*/
-static int /* 0 couldn't, 1 could */
-pull(struct nfa * nfa,
- struct arc * con)
+static int /* 0 couldn't, 1 could */
+pull(nfa, con)
+struct nfa *nfa;
+struct arc *con;
{
struct state *from = con->from;
struct state *to = con->to;
struct arc *nexta;
struct state *s;
- if (from == to)
- { /* circular constraint is pointless */
+ if (from == to) { /* circular constraint is pointless */
freearc(nfa, con);
return 1;
}
- if (from->flag) /* can't pull back beyond start */
+ if (from->flag) /* can't pull back beyond start */
return 0;
- if (from->nins == 0)
- { /* unreachable */
+ if (from->nins == 0) { /* unreachable */
freearc(nfa, con);
return 1;
}
/* first, clone from state if necessary to avoid other outarcs */
- if (from->nouts > 1)
- {
+ if (from->nouts > 1) {
s = newstate(nfa);
if (NISERR())
return 0;
assert(to != from); /* con is not an inarc */
- copyins(nfa, from, s); /* duplicate inarcs */
- cparc(nfa, con, s, to); /* move constraint arc */
+ copyins(nfa, from, s); /* duplicate inarcs */
+ cparc(nfa, con, s, to); /* move constraint arc */
freearc(nfa, con);
from = s;
con = from->outs;
assert(from->nouts == 1);
/* propagate the constraint into the from state's inarcs */
- for (a = from->ins; a != NULL; a = nexta)
- {
+ for (a = from->ins; a != NULL; a = nexta) {
nexta = a->inchain;
- switch (combine(con, a))
- {
- case INCOMPATIBLE: /* destroy the arc */
- freearc(nfa, a);
- break;
- case SATISFIED: /* no action needed */
- break;
- case COMPATIBLE: /* swap the two arcs, more or less */
- s = newstate(nfa);
- if (NISERR())
- return 0;
- cparc(nfa, a, s, to); /* anticipate move */
- cparc(nfa, con, a->from, s);
- if (NISERR())
- return 0;
- freearc(nfa, a);
- break;
- default:
- assert(NOTREACHED);
- break;
+ switch (combine(con, a)) {
+ case INCOMPATIBLE: /* destroy the arc */
+ freearc(nfa, a);
+ break;
+ case SATISFIED: /* no action needed */
+ break;
+ case COMPATIBLE: /* swap the two arcs, more or less */
+ s = newstate(nfa);
+ if (NISERR())
+ return 0;
+ cparc(nfa, a, s, to); /* anticipate move */
+ cparc(nfa, con, a->from, s);
+ if (NISERR())
+ return 0;
+ freearc(nfa, a);
+ break;
+ default:
+ assert(NOTREACHED);
+ break;
}
}
}
/*
- * pushfwd - push forward constraints forward to (with luck) eliminate them
+ - pushfwd - push forward constraints forward to (with luck) eliminate them
+ ^ static VOID pushfwd(struct nfa *, FILE *);
*/
-static void
-pushfwd(struct nfa * nfa,
- FILE *f) /* for debug output; NULL none */
+static VOID
+pushfwd(nfa, f)
+struct nfa *nfa;
+FILE *f; /* for debug output; NULL none */
{
struct state *s;
struct state *nexts;
struct arc *a;
struct arc *nexta;
- int progress;
+ int progress;
/* find and push until there are no more */
- do
- {
+ do {
progress = 0;
- for (s = nfa->states; s != NULL && !NISERR(); s = nexts)
- {
+ for (s = nfa->states; s != NULL && !NISERR(); s = nexts) {
nexts = s->next;
- for (a = s->ins; a != NULL && !NISERR(); a = nexta)
- {
+ for (a = s->ins; a != NULL && !NISERR(); a = nexta) {
nexta = a->inchain;
if (a->type == '$' || a->type == AHEAD)
if (push(nfa, a))
if (NISERR())
return;
- for (a = nfa->post->ins; a != NULL; a = nexta)
- {
+ for (a = nfa->post->ins; a != NULL; a = nexta) {
nexta = a->inchain;
- if (a->type == '$')
- {
+ if (a->type == '$') {
assert(a->co == 0 || a->co == 1);
newarc(nfa, PLAIN, nfa->eos[a->co], a->from, a->to);
freearc(nfa, a);
}
/*
- * push - push a forward constraint forward past its destination state
+ - push - push a forward constraint forward past its destination state
* A significant property of this function is that it deletes at most
* one state -- the constraint's to state -- and only if the constraint
* was that state's last inarc.
+ ^ static int push(struct nfa *, struct arc *);
*/
-static int /* 0 couldn't, 1 could */
-push(struct nfa * nfa,
- struct arc * con)
+static int /* 0 couldn't, 1 could */
+push(nfa, con)
+struct nfa *nfa;
+struct arc *con;
{
struct state *from = con->from;
struct state *to = con->to;
struct arc *nexta;
struct state *s;
- if (to == from)
- { /* circular constraint is pointless */
+ if (to == from) { /* circular constraint is pointless */
freearc(nfa, con);
return 1;
}
- if (to->flag) /* can't push forward beyond end */
+ if (to->flag) /* can't push forward beyond end */
return 0;
- if (to->nouts == 0)
- { /* dead end */
+ if (to->nouts == 0) { /* dead end */
freearc(nfa, con);
return 1;
}
/* first, clone to state if necessary to avoid other inarcs */
- if (to->nins > 1)
- {
+ if (to->nins > 1) {
s = newstate(nfa);
if (NISERR())
return 0;
- copyouts(nfa, to, s); /* duplicate outarcs */
- cparc(nfa, con, from, s); /* move constraint */
+ copyouts(nfa, to, s); /* duplicate outarcs */
+ cparc(nfa, con, from, s); /* move constraint */
freearc(nfa, con);
to = s;
con = to->ins;
assert(to->nins == 1);
/* propagate the constraint into the to state's outarcs */
- for (a = to->outs; a != NULL; a = nexta)
- {
+ for (a = to->outs; a != NULL; a = nexta) {
nexta = a->outchain;
- switch (combine(con, a))
- {
- case INCOMPATIBLE: /* destroy the arc */
- freearc(nfa, a);
- break;
- case SATISFIED: /* no action needed */
- break;
- case COMPATIBLE: /* swap the two arcs, more or less */
- s = newstate(nfa);
- if (NISERR())
- return 0;
- cparc(nfa, con, s, a->to); /* anticipate move */
- cparc(nfa, a, from, s);
- if (NISERR())
- return 0;
- freearc(nfa, a);
- break;
- default:
- assert(NOTREACHED);
- break;
+ switch (combine(con, a)) {
+ case INCOMPATIBLE: /* destroy the arc */
+ freearc(nfa, a);
+ break;
+ case SATISFIED: /* no action needed */
+ break;
+ case COMPATIBLE: /* swap the two arcs, more or less */
+ s = newstate(nfa);
+ if (NISERR())
+ return 0;
+ cparc(nfa, con, s, a->to); /* anticipate move */
+ cparc(nfa, a, from, s);
+ if (NISERR())
+ return 0;
+ freearc(nfa, a);
+ break;
+ default:
+ assert(NOTREACHED);
+ break;
}
}
/* remaining outarcs, if any, incorporate the constraint */
moveouts(nfa, to, from);
- dropstate(nfa, to); /* will free the constraint */
+ dropstate(nfa, to); /* will free the constraint */
return 1;
}
/*
- * combine - constraint lands on an arc, what happens?
- *
- * #def INCOMPATIBLE 1 // destroys arc
- * #def SATISFIED 2 // constraint satisfied
- * #def COMPATIBLE 3 // compatible but not satisfied yet
+ - combine - constraint lands on an arc, what happens?
+ ^ #def INCOMPATIBLE 1 // destroys arc
+ ^ #def SATISFIED 2 // constraint satisfied
+ ^ #def COMPATIBLE 3 // compatible but not satisfied yet
+ ^ static int combine(struct arc *, struct arc *);
*/
+
+/* FIXME Required for CW 8 on Mac since it's not in limits.h */
+#ifndef __CHAR_BIT__
+#define __CHAR_BIT__ 8
+#endif
+
+
static int
-combine(struct arc * con,
- struct arc * a)
+combine(con, a)
+struct arc *con;
+struct arc *a;
{
-#define CA(ct,at) (((ct)<<CHAR_BIT) | (at))
-
- switch (CA(con->type, a->type))
- {
- case CA('^', PLAIN): /* newlines are handled separately */
- case CA('$', PLAIN):
- return INCOMPATIBLE;
- break;
- case CA(AHEAD, PLAIN): /* color constraints meet colors */
- case CA(BEHIND, PLAIN):
- if (con->co == a->co)
- return SATISFIED;
- return INCOMPATIBLE;
- break;
- case CA('^', '^'): /* collision, similar constraints */
- case CA('$', '$'):
- case CA(AHEAD, AHEAD):
- case CA(BEHIND, BEHIND):
- if (con->co == a->co) /* true duplication */
- return SATISFIED;
- return INCOMPATIBLE;
- break;
- case CA('^', BEHIND): /* collision, dissimilar constraints */
- case CA(BEHIND, '^'):
- case CA('$', AHEAD):
- case CA(AHEAD, '$'):
- return INCOMPATIBLE;
- break;
- case CA('^', '$'): /* constraints passing each other */
- case CA('^', AHEAD):
- case CA(BEHIND, '$'):
- case CA(BEHIND, AHEAD):
- case CA('$', '^'):
- case CA('$', BEHIND):
- case CA(AHEAD, '^'):
- case CA(AHEAD, BEHIND):
- case CA('^', LACON):
- case CA(BEHIND, LACON):
- case CA('$', LACON):
- case CA(AHEAD, LACON):
- return COMPATIBLE;
- break;
+# define CA(ct,at) (((ct)<<CHAR_BIT) | (at))
+
+ switch (CA(con->type, a->type)) {
+ case CA('^', PLAIN): /* newlines are handled separately */
+ case CA('$', PLAIN):
+ return INCOMPATIBLE;
+ break;
+ case CA(AHEAD, PLAIN): /* color constraints meet colors */
+ case CA(BEHIND, PLAIN):
+ if (con->co == a->co)
+ return SATISFIED;
+ return INCOMPATIBLE;
+ break;
+ case CA('^', '^'): /* collision, similar constraints */
+ case CA('$', '$'):
+ case CA(AHEAD, AHEAD):
+ case CA(BEHIND, BEHIND):
+ if (con->co == a->co) /* true duplication */
+ return SATISFIED;
+ return INCOMPATIBLE;
+ break;
+ case CA('^', BEHIND): /* collision, dissimilar constraints */
+ case CA(BEHIND, '^'):
+ case CA('$', AHEAD):
+ case CA(AHEAD, '$'):
+ return INCOMPATIBLE;
+ break;
+ case CA('^', '$'): /* constraints passing each other */
+ case CA('^', AHEAD):
+ case CA(BEHIND, '$'):
+ case CA(BEHIND, AHEAD):
+ case CA('$', '^'):
+ case CA('$', BEHIND):
+ case CA(AHEAD, '^'):
+ case CA(AHEAD, BEHIND):
+ case CA('^', LACON):
+ case CA(BEHIND, LACON):
+ case CA('$', LACON):
+ case CA(AHEAD, LACON):
+ return COMPATIBLE;
+ break;
}
assert(NOTREACHED);
return INCOMPATIBLE; /* for benefit of blind compilers */
}
/*
- * fixempties - get rid of EMPTY arcs
+ - fixempties - get rid of EMPTY arcs
+ ^ static VOID fixempties(struct nfa *, FILE *);
*/
-static void
-fixempties(struct nfa * nfa,
- FILE *f) /* for debug output; NULL none */
+static VOID
+fixempties(nfa, f)
+struct nfa *nfa;
+FILE *f; /* for debug output; NULL none */
{
struct state *s;
struct state *nexts;
struct arc *a;
struct arc *nexta;
- int progress;
+ int progress;
/* find and eliminate empties until there are no more */
- do
- {
+ do {
progress = 0;
- for (s = nfa->states; s != NULL && !NISERR(); s = nexts)
- {
+ for (s = nfa->states; s != NULL && !NISERR(); s = nexts) {
nexts = s->next;
- for (a = s->outs; a != NULL && !NISERR(); a = nexta)
- {
+ for (a = s->outs; a != NULL && !NISERR(); a = nexta) {
nexta = a->outchain;
if (a->type == EMPTY && unempty(nfa, a))
progress = 1;
}
/*
- * unempty - optimize out an EMPTY arc, if possible
- *
+ - unempty - optimize out an EMPTY arc, if possible
* Actually, as it stands this function always succeeds, but the return
* value is kept with an eye on possible future changes.
+ ^ static int unempty(struct nfa *, struct arc *);
*/
-static int /* 0 couldn't, 1 could */
-unempty(struct nfa * nfa,
- struct arc * a)
+static int /* 0 couldn't, 1 could */
+unempty(nfa, a)
+struct nfa *nfa;
+struct arc *a;
{
struct state *from = a->from;
struct state *to = a->to;
- int usefrom; /* work on from, as opposed to to? */
+ int usefrom; /* work on from, as opposed to to? */
assert(a->type == EMPTY);
assert(from != nfa->pre && to != nfa->post);
- if (from == to)
- { /* vacuous loop */
+ if (from == to) { /* vacuous loop */
freearc(nfa, a);
return 1;
}
/* decide which end to work on */
- usefrom = 1; /* default: attack from */
+ usefrom = 1; /* default: attack from */
if (from->nouts > to->nins)
usefrom = 0;
- else if (from->nouts == to->nins)
- {
+ else if (from->nouts == to->nins) {
/* decide on secondary issue: move/copy fewest arcs */
if (from->nins > to->nouts)
usefrom = 0;
}
-
+
freearc(nfa, a);
- if (usefrom)
- {
- if (from->nouts == 0)
- {
+ if (usefrom) {
+ if (from->nouts == 0) {
/* was the state's only outarc */
moveins(nfa, from, to);
freestate(nfa, from);
- }
- else
+ } else
copyins(nfa, from, to);
- }
- else
- {
- if (to->nins == 0)
- {
+ } else {
+ if (to->nins == 0) {
/* was the state's only inarc */
moveouts(nfa, to, from);
freestate(nfa, to);
- }
- else
+ } else
copyouts(nfa, to, from);
}
}
/*
- * cleanup - clean up NFA after optimizations
+ - cleanup - clean up NFA after optimizations
+ ^ static VOID cleanup(struct nfa *);
*/
-static void
-cleanup(struct nfa * nfa)
+static VOID
+cleanup(nfa)
+struct nfa *nfa;
{
struct state *s;
struct state *nexts;
- int n;
+ int n;
/* clear out unreachable or dead-end states */
/* use pre to mark reachable, then post to mark can-reach-post */
- markreachable(nfa, nfa->pre, (struct state *) NULL, nfa->pre);
+ markreachable(nfa, nfa->pre, (struct state *)NULL, nfa->pre);
markcanreach(nfa, nfa->post, nfa->pre, nfa->post);
- for (s = nfa->states; s != NULL; s = nexts)
- {
+ for (s = nfa->states; s != NULL; s = nexts) {
nexts = s->next;
if (s->tmp != nfa->post && !s->flag)
dropstate(nfa, s);
}
/*
- * markreachable - recursive marking of reachable states
+ - markreachable - recursive marking of reachable states
+ ^ static VOID markreachable(struct nfa *, struct state *, struct state *,
+ ^ struct state *);
*/
-static void
-markreachable(struct nfa * nfa,
- struct state * s,
- struct state * okay, /* consider only states with this
- * mark */
- struct state * mark) /* the value to mark with */
+static VOID
+markreachable(nfa, s, okay, mark)
+struct nfa *nfa;
+struct state *s;
+struct state *okay; /* consider only states with this mark */
+struct state *mark; /* the value to mark with */
{
struct arc *a;
}
/*
- * markcanreach - recursive marking of states which can reach here
+ - markcanreach - recursive marking of states which can reach here
+ ^ static VOID markcanreach(struct nfa *, struct state *, struct state *,
+ ^ struct state *);
*/
-static void
-markcanreach(struct nfa * nfa,
- struct state * s,
- struct state * okay, /* consider only states with this
- * mark */
- struct state * mark) /* the value to mark with */
+static VOID
+markcanreach(nfa, s, okay, mark)
+struct nfa *nfa;
+struct state *s;
+struct state *okay; /* consider only states with this mark */
+struct state *mark; /* the value to mark with */
{
struct arc *a;
}
/*
- * analyze - ascertain potentially-useful facts about an optimized NFA
+ - analyze - ascertain potentially-useful facts about an optimized NFA
+ ^ static long analyze(struct nfa *);
*/
-static long /* re_info bits to be ORed in */
-analyze(struct nfa * nfa)
+static long /* re_info bits to be ORed in */
+analyze(nfa)
+struct nfa *nfa;
{
struct arc *a;
struct arc *aa;
}
/*
- * compact - compact an NFA
+ - compact - compact an NFA
+ ^ static VOID compact(struct nfa *, struct cnfa *);
*/
-static void
-compact(struct nfa * nfa,
- struct cnfa * cnfa)
+static VOID
+compact(nfa, cnfa)
+struct nfa *nfa;
+struct cnfa *cnfa;
{
struct state *s;
struct arc *a;
- size_t nstates;
- size_t narcs;
+ size_t nstates;
+ size_t narcs;
struct carc *ca;
struct carc *first;
- assert(!NISERR());
+ assert (!NISERR());
nstates = 0;
narcs = 0;
- for (s = nfa->states; s != NULL; s = s->next)
- {
+ for (s = nfa->states; s != NULL; s = s->next) {
nstates++;
narcs += 1 + s->nouts + 1;
/* 1 as a fake for flags, nouts for arcs, 1 as endmarker */
}
- cnfa->states = (struct carc **) MALLOC(nstates * sizeof(struct carc *));
- cnfa->arcs = (struct carc *) MALLOC(narcs * sizeof(struct carc));
- if (cnfa->states == NULL || cnfa->arcs == NULL)
- {
+ cnfa->states = (struct carc **)MALLOC(nstates * sizeof(struct carc *));
+ cnfa->arcs = (struct carc *)MALLOC(narcs * sizeof(struct carc));
+ if (cnfa->states == NULL || cnfa->arcs == NULL) {
if (cnfa->states != NULL)
FREE(cnfa->states);
if (cnfa->arcs != NULL)
cnfa->flags = 0;
ca = cnfa->arcs;
- for (s = nfa->states; s != NULL; s = s->next)
- {
- assert((size_t) s->no < nstates);
+ for (s = nfa->states; s != NULL; s = s->next) {
+ assert((size_t)s->no < nstates);
cnfa->states[s->no] = ca;
- ca->co = 0; /* clear and skip flags "arc" */
+ ca->co = 0; /* clear and skip flags "arc" */
ca++;
first = ca;
for (a = s->outs; a != NULL; a = a->outchain)
- switch (a->type)
- {
- case PLAIN:
- ca->co = a->co;
- ca->to = a->to->no;
- ca++;
- break;
- case LACON:
- assert(s->no != cnfa->pre);
- ca->co = (color) (cnfa->ncolors + a->co);
- ca->to = a->to->no;
- ca++;
- cnfa->flags |= HASLACONS;
- break;
- default:
- assert(NOTREACHED);
- break;
+ switch (a->type) {
+ case PLAIN:
+ ca->co = a->co;
+ ca->to = a->to->no;
+ ca++;
+ break;
+ case LACON:
+ assert(s->no != cnfa->pre);
+ ca->co = (color)(cnfa->ncolors + a->co);
+ ca->to = a->to->no;
+ ca++;
+ cnfa->flags |= HASLACONS;
+ break;
+ default:
+ assert(NOTREACHED);
+ break;
}
- carcsort(first, ca - 1);
+ carcsort(first, ca-1);
ca->co = COLORLESS;
ca->to = 0;
ca++;
}
/*
- * carcsort - sort compacted-NFA arcs by color
- *
+ - carcsort - sort compacted-NFA arcs by color
* Really dumb algorithm, but if the list is long enough for that to matter,
* you're in real trouble anyway.
+ ^ static VOID carcsort(struct carc *, struct carc *);
*/
-static void
-carcsort(struct carc * first,
- struct carc * last)
+static VOID
+carcsort(first, last)
+struct carc *first;
+struct carc *last;
{
struct carc *p;
struct carc *q;
for (p = first; p <= last; p++)
for (q = p; q <= last; q++)
if (p->co > q->co ||
- (p->co == q->co && p->to > q->to))
- {
+ (p->co == q->co && p->to > q->to)) {
assert(p != q);
tmp = *p;
*p = *q;
}
/*
- * freecnfa - free a compacted NFA
+ - freecnfa - free a compacted NFA
+ ^ static VOID freecnfa(struct cnfa *);
*/
-static void
-freecnfa(struct cnfa * cnfa)
+static VOID
+freecnfa(cnfa)
+struct cnfa *cnfa;
{
- assert(cnfa->nstates != 0); /* not empty already */
+ assert(cnfa->nstates != 0); /* not empty already */
cnfa->nstates = 0;
FREE(cnfa->states);
FREE(cnfa->arcs);
}
/*
- * dumpnfa - dump an NFA in human-readable form
+ - dumpnfa - dump an NFA in human-readable form
+ ^ static VOID dumpnfa(struct nfa *, FILE *);
*/
-static void
-dumpnfa(struct nfa * nfa,
- FILE *f)
+static VOID
+dumpnfa(nfa, f)
+struct nfa *nfa;
+FILE *f;
{
#ifdef REG_DEBUG
struct state *s;
fprintf(f, "pre %d, post %d", nfa->pre->no, nfa->post->no);
if (nfa->bos[0] != COLORLESS)
- fprintf(f, ", bos [%ld]", (long) nfa->bos[0]);
+ fprintf(f, ", bos [%ld]", (long)nfa->bos[0]);
if (nfa->bos[1] != COLORLESS)
- fprintf(f, ", bol [%ld]", (long) nfa->bos[1]);
+ fprintf(f, ", bol [%ld]", (long)nfa->bos[1]);
if (nfa->eos[0] != COLORLESS)
- fprintf(f, ", eos [%ld]", (long) nfa->eos[0]);
+ fprintf(f, ", eos [%ld]", (long)nfa->eos[0]);
if (nfa->eos[1] != COLORLESS)
- fprintf(f, ", eol [%ld]", (long) nfa->eos[1]);
+ fprintf(f, ", eol [%ld]", (long)nfa->eos[1]);
fprintf(f, "\n");
for (s = nfa->states; s != NULL; s = s->next)
dumpstate(s, f);
#endif
}
-#ifdef REG_DEBUG /* subordinates of dumpnfa */
+#ifdef REG_DEBUG /* subordinates of dumpnfa */
+/*
+ ^ #ifdef REG_DEBUG
+ */
/*
- * dumpstate - dump an NFA state in human-readable form
+ - dumpstate - dump an NFA state in human-readable form
+ ^ static VOID dumpstate(struct state *, FILE *);
*/
-static void
-dumpstate(struct state * s,
- FILE *f)
+static VOID
+dumpstate(s, f)
+struct state *s;
+FILE *f;
{
struct arc *a;
fprintf(f, "%d%s%c", s->no, (s->tmp != NULL) ? "T" : "",
- (s->flag) ? s->flag : '.');
+ (s->flag) ? s->flag : '.');
if (s->prev != NULL && s->prev->next != s)
fprintf(f, "\tstate chain bad\n");
if (s->nouts == 0)
else
dumparcs(s, f);
fflush(f);
- for (a = s->ins; a != NULL; a = a->inchain)
- {
+ for (a = s->ins; a != NULL; a = a->inchain) {
if (a->to != s)
fprintf(f, "\tlink from %d to %d on %d's in-chain\n",
a->from->no, a->to->no, s->no);
}
/*
- * dumparcs - dump out-arcs in human-readable form
+ - dumparcs - dump out-arcs in human-readable form
+ ^ static VOID dumparcs(struct state *, FILE *);
*/
-static void
-dumparcs(struct state * s,
- FILE *f)
+static VOID
+dumparcs(s, f)
+struct state *s;
+FILE *f;
{
- int pos;
+ int pos;
assert(s->nouts > 0);
/* printing arcs in reverse order is usually clearer */
}
/*
- * dumprarcs - dump remaining outarcs, recursively, in reverse order
+ - dumprarcs - dump remaining outarcs, recursively, in reverse order
+ ^ static int dumprarcs(struct arc *, struct state *, FILE *, int);
*/
-static int /* resulting print position */
-dumprarcs(struct arc * a,
- struct state * s,
- FILE *f,
- int pos) /* initial print position */
+static int /* resulting print position */
+dumprarcs(a, s, f, pos)
+struct arc *a;
+struct state *s;
+FILE *f;
+int pos; /* initial print position */
{
if (a->outchain != NULL)
pos = dumprarcs(a->outchain, s, f, pos);
dumparc(a, s, f);
- if (pos == 5)
- {
+ if (pos == 5) {
fprintf(f, "\n");
pos = 1;
- }
- else
+ } else
pos++;
return pos;
}
/*
- * dumparc - dump one outarc in readable form, including prefixing tab
+ - dumparc - dump one outarc in readable form, including prefixing tab
+ ^ static VOID dumparc(struct arc *, struct state *, FILE *);
*/
-static void
-dumparc(struct arc * a,
- struct state * s,
- FILE *f)
+static VOID
+dumparc(a, s, f)
+struct arc *a;
+struct state *s;
+FILE *f;
{
struct arc *aa;
struct arcbatch *ab;
fprintf(f, "\t");
- switch (a->type)
- {
- case PLAIN:
- fprintf(f, "[%ld]", (long) a->co);
- break;
- case AHEAD:
- fprintf(f, ">%ld>", (long) a->co);
- break;
- case BEHIND:
- fprintf(f, "<%ld<", (long) a->co);
- break;
- case LACON:
- fprintf(f, ":%ld:", (long) a->co);
- break;
- case '^':
- case '$':
- fprintf(f, "%c%d", a->type, (int) a->co);
- break;
- case EMPTY:
- break;
- default:
- fprintf(f, "0x%x/0%lo", a->type, (long) a->co);
- break;
+ switch (a->type) {
+ case PLAIN:
+ fprintf(f, "[%ld]", (long)a->co);
+ break;
+ case AHEAD:
+ fprintf(f, ">%ld>", (long)a->co);
+ break;
+ case BEHIND:
+ fprintf(f, "<%ld<", (long)a->co);
+ break;
+ case LACON:
+ fprintf(f, ":%ld:", (long)a->co);
+ break;
+ case '^':
+ case '$':
+ fprintf(f, "%c%d", a->type, (int)a->co);
+ break;
+ case EMPTY:
+ break;
+ default:
+ fprintf(f, "0x%x/0%lo", a->type, (long)a->co);
+ break;
}
if (a->from != s)
fprintf(f, "?%d?", a->from->no);
- for (ab = &a->from->oas; ab != NULL; ab = ab->next)
- {
+ for (ab = &a->from->oas; ab != NULL; ab = ab->next) {
for (aa = &ab->a[0]; aa < &ab->a[ABSIZE]; aa++)
if (aa == a)
- break; /* NOTE BREAK OUT */
+ break; /* NOTE BREAK OUT */
if (aa < &ab->a[ABSIZE]) /* propagate break */
- break; /* NOTE BREAK OUT */
+ break; /* NOTE BREAK OUT */
}
if (ab == NULL)
- fprintf(f, "?!?"); /* not in allocated space */
+ fprintf(f, "?!?"); /* not in allocated space */
fprintf(f, "->");
- if (a->to == NULL)
- {
+ if (a->to == NULL) {
fprintf(f, "NULL");
return;
}
fprintf(f, "%d", a->to->no);
for (aa = a->to->ins; aa != NULL; aa = aa->inchain)
if (aa == a)
- break; /* NOTE BREAK OUT */
+ break; /* NOTE BREAK OUT */
if (aa == NULL)
- fprintf(f, "?!?"); /* missing from in-chain */
+ fprintf(f, "?!?"); /* missing from in-chain */
}
-#endif /* REG_DEBUG */
/*
- * dumpcnfa - dump a compacted NFA in human-readable form
+ ^ #endif
*/
-#ifdef REG_DEBUG
-static void
-dumpcnfa(struct cnfa * cnfa,
- FILE *f)
+#endif /* ifdef REG_DEBUG */
+
+/*
+ - dumpcnfa - dump a compacted NFA in human-readable form
+ ^ static VOID dumpcnfa(struct cnfa *, FILE *);
+ */
+static VOID
+dumpcnfa(cnfa, f)
+struct cnfa *cnfa;
+FILE *f;
{
- int st;
+#ifdef REG_DEBUG
+ int st;
fprintf(f, "pre %d, post %d", cnfa->pre, cnfa->post);
if (cnfa->bos[0] != COLORLESS)
- fprintf(f, ", bos [%ld]", (long) cnfa->bos[0]);
+ fprintf(f, ", bos [%ld]", (long)cnfa->bos[0]);
if (cnfa->bos[1] != COLORLESS)
- fprintf(f, ", bol [%ld]", (long) cnfa->bos[1]);
+ fprintf(f, ", bol [%ld]", (long)cnfa->bos[1]);
if (cnfa->eos[0] != COLORLESS)
- fprintf(f, ", eos [%ld]", (long) cnfa->eos[0]);
+ fprintf(f, ", eos [%ld]", (long)cnfa->eos[0]);
if (cnfa->eos[1] != COLORLESS)
- fprintf(f, ", eol [%ld]", (long) cnfa->eos[1]);
- if (cnfa->flags & HASLACONS)
+ fprintf(f, ", eol [%ld]", (long)cnfa->eos[1]);
+ if (cnfa->flags&HASLACONS)
fprintf(f, ", haslacons");
fprintf(f, "\n");
for (st = 0; st < cnfa->nstates; st++)
dumpcstate(st, cnfa->states[st], cnfa, f);
fflush(f);
-}
#endif
+}
-#ifdef REG_DEBUG /* subordinates of dumpcnfa */
+#ifdef REG_DEBUG /* subordinates of dumpcnfa */
+/*
+ ^ #ifdef REG_DEBUG
+ */
/*
- * dumpcstate - dump a compacted-NFA state in human-readable form
+ - dumpcstate - dump a compacted-NFA state in human-readable form
+ ^ static VOID dumpcstate(int, struct carc *, struct cnfa *, FILE *);
*/
-static void
-dumpcstate(int st,
- struct carc * ca,
- struct cnfa * cnfa,
- FILE *f)
+static VOID
+dumpcstate(st, ca, cnfa, f)
+int st;
+struct carc *ca;
+struct cnfa *cnfa;
+FILE *f;
{
- int i;
- int pos;
+ int i;
+ int pos;
fprintf(f, "%d%s", st, (ca[0].co) ? ":" : ".");
pos = 1;
- for (i = 1; ca[i].co != COLORLESS; i++)
- {
+ for (i = 1; ca[i].co != COLORLESS; i++) {
if (ca[i].co < cnfa->ncolors)
- fprintf(f, "\t[%ld]->%d", (long) ca[i].co, ca[i].to);
+ fprintf(f, "\t[%ld]->%d", (long)ca[i].co, ca[i].to);
else
- fprintf(f, "\t:%ld:->%d", (long) ca[i].co - cnfa->ncolors,
- ca[i].to);
- if (pos == 5)
- {
+ fprintf(f, "\t:%ld:->%d", (long)ca[i].co-cnfa->ncolors,
+ ca[i].to);
+ if (pos == 5) {
fprintf(f, "\n");
pos = 1;
- }
- else
+ } else
pos++;
}
if (i == 1 || pos != 1)
fflush(f);
}
-#endif /* REG_DEBUG */
+/*
+ ^ #endif
+ */
+#endif /* ifdef REG_DEBUG */
projects / wxWidgets.git / blobdiff