* DFA routines
* This file is #included by regexec.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.
*
- * $Header$
- *
*/
/*
- * longest - longest-preferred matching engine
+ - longest - longest-preferred matching engine
+ ^ static chr *longest(struct vars *, struct dfa *, chr *, chr *, int *);
*/
-static chr * /* endpoint, or NULL */
-longest(struct vars * v, /* used only for debug and exec flags */
- struct dfa * d,
- chr *start, /* where the match should start */
- chr *stop, /* match must end at or before here */
- int *hitstopp) /* record whether hit v->stop, if non-NULL */
+static chr * /* endpoint, or NULL */
+longest(v, d, start, stop, hitstopp)
+struct vars *v; /* used only for debug and exec flags */
+struct dfa *d;
+chr *start; /* where the match should start */
+chr *stop; /* match must end at or before here */
+int *hitstopp; /* record whether hit v->stop, if non-NULL */
{
- chr *cp;
- chr *realstop = (stop == v->stop) ? stop : stop + 1;
- color co;
+ chr *cp;
+ chr *realstop = (stop == v->stop) ? stop : stop + 1;
+ color co;
struct sset *css;
struct sset *ss;
- chr *post;
- int i;
+ chr *post;
+ int i;
struct colormap *cm = d->cm;
/* initialize */
/* startup */
FDEBUG(("+++ startup +++\n"));
- if (cp == v->start)
- {
- co = d->cnfa->bos[(v->eflags & REG_NOTBOL) ? 0 : 1];
- FDEBUG(("color %ld\n", (long) co));
- }
- else
- {
+ if (cp == v->start) {
+ co = d->cnfa->bos[(v->eflags®_NOTBOL) ? 0 : 1];
+ FDEBUG(("color %ld\n", (long)co));
+ } else {
co = GETCOLOR(cm, *(cp - 1));
- FDEBUG(("char %c, color %ld\n", (char) *(cp - 1), (long) co));
+ FDEBUG(("char %c, color %ld\n", (char)*(cp-1), (long)co));
}
css = miss(v, d, css, co, cp, start);
if (css == NULL)
css->lastseen = cp;
/* main loop */
- if (v->eflags & REG_FTRACE)
- while (cp < realstop)
- {
+ if (v->eflags®_FTRACE)
+ while (cp < realstop) {
FDEBUG(("+++ at c%d +++\n", css - d->ssets));
co = GETCOLOR(cm, *cp);
- FDEBUG(("char %c, color %ld\n", (char) *cp, (long) co));
+ FDEBUG(("char %c, color %ld\n", (char)*cp, (long)co));
ss = css->outs[co];
- if (ss == NULL)
- {
- ss = miss(v, d, css, co, cp + 1, start);
+ if (ss == NULL) {
+ ss = miss(v, d, css, co, cp+1, start);
if (ss == NULL)
- break; /* NOTE BREAK OUT */
+ break; /* NOTE BREAK OUT */
}
cp++;
ss->lastseen = cp;
css = ss;
}
else
- while (cp < realstop)
- {
+ while (cp < realstop) {
co = GETCOLOR(cm, *cp);
ss = css->outs[co];
- if (ss == NULL)
- {
- ss = miss(v, d, css, co, cp + 1, start);
+ if (ss == NULL) {
+ ss = miss(v, d, css, co, cp+1, start);
if (ss == NULL)
- break; /* NOTE BREAK OUT */
+ break; /* NOTE BREAK OUT */
}
cp++;
ss->lastseen = cp;
/* shutdown */
FDEBUG(("+++ shutdown at c%d +++\n", css - d->ssets));
- if (cp == v->stop && stop == v->stop)
- {
+ if (cp == v->stop && stop == v->stop) {
if (hitstopp != NULL)
*hitstopp = 1;
- co = d->cnfa->eos[(v->eflags & REG_NOTEOL) ? 0 : 1];
- FDEBUG(("color %ld\n", (long) co));
+ co = d->cnfa->eos[(v->eflags®_NOTEOL) ? 0 : 1];
+ FDEBUG(("color %ld\n", (long)co));
ss = miss(v, d, css, co, cp, start);
/* special case: match ended at eol? */
- if (ss != NULL && (ss->flags & POSTSTATE))
+ if (ss != NULL && (ss->flags&POSTSTATE))
return cp;
else if (ss != NULL)
ss->lastseen = cp; /* to be tidy */
/* find last match, if any */
post = d->lastpost;
for (ss = d->ssets, i = d->nssused; i > 0; ss++, i--)
- if ((ss->flags & POSTSTATE) && post != ss->lastseen &&
- (post == NULL || post < ss->lastseen))
+ if ((ss->flags&POSTSTATE) && post != ss->lastseen &&
+ (post == NULL || post < ss->lastseen))
post = ss->lastseen;
- if (post != NULL) /* found one */
+ if (post != NULL) /* found one */
return post - 1;
return NULL;
}
/*
- * shortest - shortest-preferred matching engine
+ - shortest - shortest-preferred matching engine
+ ^ static chr *shortest(struct vars *, struct dfa *, chr *, chr *, chr *,
+ ^ chr **, int *);
*/
-static chr * /* endpoint, or NULL */
-shortest(struct vars * v,
- struct dfa * d,
- chr *start, /* where the match should start */
- chr *min, /* match must end at or after here */
- chr *max, /* match must end at or before here */
- chr **coldp, /* store coldstart pointer here, if
- * nonNULL */
- int *hitstopp) /* record whether hit v->stop, if non-NULL */
+static chr * /* endpoint, or NULL */
+shortest(v, d, start, min, max, coldp, hitstopp)
+struct vars *v;
+struct dfa *d;
+chr *start; /* where the match should start */
+chr *min; /* match must end at or after here */
+chr *max; /* match must end at or before here */
+chr **coldp; /* store coldstart pointer here, if nonNULL */
+int *hitstopp; /* record whether hit v->stop, if non-NULL */
{
- chr *cp;
- chr *realmin = (min == v->stop) ? min : min + 1;
- chr *realmax = (max == v->stop) ? max : max + 1;
- color co;
+ chr *cp;
+ chr *realmin = (min == v->stop) ? min : min + 1;
+ chr *realmax = (max == v->stop) ? max : max + 1;
+ color co;
struct sset *css;
struct sset *ss;
struct colormap *cm = d->cm;
/* startup */
FDEBUG(("--- startup ---\n"));
- if (cp == v->start)
- {
- co = d->cnfa->bos[(v->eflags & REG_NOTBOL) ? 0 : 1];
- FDEBUG(("color %ld\n", (long) co));
- }
- else
- {
+ if (cp == v->start) {
+ co = d->cnfa->bos[(v->eflags®_NOTBOL) ? 0 : 1];
+ FDEBUG(("color %ld\n", (long)co));
+ } else {
co = GETCOLOR(cm, *(cp - 1));
- FDEBUG(("char %c, color %ld\n", (char) *(cp - 1), (long) co));
+ FDEBUG(("char %c, color %ld\n", (char)*(cp-1), (long)co));
}
css = miss(v, d, css, co, cp, start);
if (css == NULL)
ss = css;
/* main loop */
- if (v->eflags & REG_FTRACE)
- while (cp < realmax)
- {
+ if (v->eflags®_FTRACE)
+ while (cp < realmax) {
FDEBUG(("--- at c%d ---\n", css - d->ssets));
co = GETCOLOR(cm, *cp);
- FDEBUG(("char %c, color %ld\n", (char) *cp, (long) co));
+ FDEBUG(("char %c, color %ld\n", (char)*cp, (long)co));
ss = css->outs[co];
- if (ss == NULL)
- {
- ss = miss(v, d, css, co, cp + 1, start);
+ if (ss == NULL) {
+ ss = miss(v, d, css, co, cp+1, start);
if (ss == NULL)
- break; /* NOTE BREAK OUT */
+ break; /* NOTE BREAK OUT */
}
cp++;
ss->lastseen = cp;
css = ss;
- if ((ss->flags & POSTSTATE) && cp >= realmin)
- break; /* NOTE BREAK OUT */
+ if ((ss->flags&POSTSTATE) && cp >= realmin)
+ break; /* NOTE BREAK OUT */
}
else
- while (cp < realmax)
- {
+ while (cp < realmax) {
co = GETCOLOR(cm, *cp);
ss = css->outs[co];
- if (ss == NULL)
- {
- ss = miss(v, d, css, co, cp + 1, start);
+ if (ss == NULL) {
+ ss = miss(v, d, css, co, cp+1, start);
if (ss == NULL)
- break; /* NOTE BREAK OUT */
+ break; /* NOTE BREAK OUT */
}
cp++;
ss->lastseen = cp;
css = ss;
- if ((ss->flags & POSTSTATE) && cp >= realmin)
- break; /* NOTE BREAK OUT */
+ if ((ss->flags&POSTSTATE) && cp >= realmin)
+ break; /* NOTE BREAK OUT */
}
if (ss == NULL)
return NULL;
- if (coldp != NULL) /* report last no-progress state set, if
- * any */
+ if (coldp != NULL) /* report last no-progress state set, if any */
*coldp = lastcold(v, d);
- if ((ss->flags & POSTSTATE) && cp > min)
- {
+ if ((ss->flags&POSTSTATE) && cp > min) {
assert(cp >= realmin);
cp--;
- }
- else if (cp == v->stop && max == v->stop)
- {
- co = d->cnfa->eos[(v->eflags & REG_NOTEOL) ? 0 : 1];
- FDEBUG(("color %ld\n", (long) co));
+ } else if (cp == v->stop && max == v->stop) {
+ co = d->cnfa->eos[(v->eflags®_NOTEOL) ? 0 : 1];
+ FDEBUG(("color %ld\n", (long)co));
ss = miss(v, d, css, co, cp, start);
/* match might have ended at eol */
- if ((ss == NULL || !(ss->flags & POSTSTATE)) && hitstopp != NULL)
+ if ((ss == NULL || !(ss->flags&POSTSTATE)) && hitstopp != NULL)
*hitstopp = 1;
}
- if (ss == NULL || !(ss->flags & POSTSTATE))
+ if (ss == NULL || !(ss->flags&POSTSTATE))
return NULL;
return cp;
}
/*
- * lastcold - determine last point at which no progress had been made
+ - lastcold - determine last point at which no progress had been made
+ ^ static chr *lastcold(struct vars *, struct dfa *);
*/
-static chr * /* endpoint, or NULL */
-lastcold(struct vars * v,
- struct dfa * d)
+static chr * /* endpoint, or NULL */
+lastcold(v, d)
+struct vars *v;
+struct dfa *d;
{
struct sset *ss;
- chr *nopr;
- int i;
+ chr *nopr;
+ int i;
nopr = d->lastnopr;
if (nopr == NULL)
nopr = v->start;
for (ss = d->ssets, i = d->nssused; i > 0; ss++, i--)
- if ((ss->flags & NOPROGRESS) && nopr < ss->lastseen)
+ if ((ss->flags&NOPROGRESS) && nopr < ss->lastseen)
nopr = ss->lastseen;
return nopr;
}
/*
- * newdfa - set up a fresh DFA
+ - newdfa - set up a fresh DFA
+ ^ static struct dfa *newdfa(struct vars *, struct cnfa *,
+ ^ struct colormap *, struct smalldfa *);
*/
static struct dfa *
-newdfa(struct vars * v,
- struct cnfa * cnfa,
- struct colormap * cm,
- struct smalldfa * small) /* preallocated space, may be NULL */
+newdfa(v, cnfa, cm, small)
+struct vars *v;
+struct cnfa *cnfa;
+struct colormap *cm;
+struct smalldfa *small; /* preallocated space, may be NULL */
{
struct dfa *d;
- size_t nss = cnfa->nstates * 2;
- int wordsper = (cnfa->nstates + UBITS - 1) / UBITS;
+ size_t nss = cnfa->nstates * 2;
+ int wordsper = (cnfa->nstates + UBITS - 1) / UBITS;
struct smalldfa *smallwas = small;
assert(cnfa != NULL && cnfa->nstates != 0);
- if (nss <= FEWSTATES && cnfa->ncolors <= FEWCOLORS)
- {
+ if (nss <= FEWSTATES && cnfa->ncolors <= FEWCOLORS) {
assert(wordsper == 1);
- if (small == NULL)
- {
- small = (struct smalldfa *) MALLOC(
- sizeof(struct smalldfa));
- if (small == NULL)
- {
+ if (small == NULL) {
+ small = (struct smalldfa *)MALLOC(
+ sizeof(struct smalldfa));
+ if (small == NULL) {
ERR(REG_ESPACE);
return NULL;
}
d->outsarea = small->outsarea;
d->incarea = small->incarea;
d->cptsmalloced = 0;
- d->mallocarea = (smallwas == NULL) ? (char *) small : NULL;
- }
- else
- {
- d = (struct dfa *) MALLOC(sizeof(struct dfa));
- if (d == NULL)
- {
+ d->mallocarea = (smallwas == NULL) ? (char *)small : NULL;
+ } else {
+ d = (struct dfa *)MALLOC(sizeof(struct dfa));
+ if (d == NULL) {
ERR(REG_ESPACE);
return NULL;
}
- d->ssets = (struct sset *) MALLOC(nss * sizeof(struct sset));
- d->statesarea = (unsigned *) MALLOC((nss + WORK) * wordsper *
- sizeof(unsigned));
+ d->ssets = (struct sset *)MALLOC(nss * sizeof(struct sset));
+ d->statesarea = (unsigned *)MALLOC((nss+WORK) * wordsper *
+ sizeof(unsigned));
d->work = &d->statesarea[nss * wordsper];
- d->outsarea = (struct sset **) MALLOC(nss * cnfa->ncolors *
- sizeof(struct sset *));
- d->incarea = (struct arcp *) MALLOC(nss * cnfa->ncolors *
- sizeof(struct arcp));
+ d->outsarea = (struct sset **)MALLOC(nss * cnfa->ncolors *
+ sizeof(struct sset *));
+ d->incarea = (struct arcp *)MALLOC(nss * cnfa->ncolors *
+ sizeof(struct arcp));
d->cptsmalloced = 1;
- d->mallocarea = (char *) d;
+ d->mallocarea = (char *)d;
if (d->ssets == NULL || d->statesarea == NULL ||
- d->outsarea == NULL || d->incarea == NULL)
- {
+ d->outsarea == NULL || d->incarea == NULL) {
freedfa(d);
ERR(REG_ESPACE);
return NULL;
}
}
- d->nssets = (v->eflags & REG_SMALL) ? 7 : nss;
+ d->nssets = (v->eflags®_SMALL) ? 7 : nss;
d->nssused = 0;
d->nstates = cnfa->nstates;
d->ncolors = cnfa->ncolors;
}
/*
- * freedfa - free a DFA
+ - freedfa - free a DFA
+ ^ static VOID freedfa(struct dfa *);
*/
-static void
-freedfa(struct dfa * d)
+static VOID
+freedfa(d)
+struct dfa *d;
{
- if (d->cptsmalloced)
- {
+ if (d->cptsmalloced) {
if (d->ssets != NULL)
FREE(d->ssets);
if (d->statesarea != NULL)
}
/*
- * hash - construct a hash code for a bitvector
- *
+ - hash - construct a hash code for a bitvector
* There are probably better ways, but they're more expensive.
+ ^ static unsigned hash(unsigned *, int);
*/
static unsigned
-hash(unsigned *uv,
- int n)
+hash(uv, n)
+unsigned *uv;
+int n;
{
- int i;
- unsigned h;
+ int i;
+ unsigned h;
h = 0;
for (i = 0; i < n; i++)
}
/*
- * initialize - hand-craft a cache entry for startup, otherwise get ready
+ - initialize - hand-craft a cache entry for startup, otherwise get ready
+ ^ static struct sset *initialize(struct vars *, struct dfa *, chr *);
*/
static struct sset *
-initialize(struct vars * v, /* used only for debug flags */
- struct dfa * d,
- chr *start)
+initialize(v, d, start)
+struct vars *v; /* used only for debug flags */
+struct dfa *d;
+chr *start;
{
struct sset *ss;
- int i;
+ int i;
/* is previous one still there? */
- if (d->nssused > 0 && (d->ssets[0].flags & STARTER))
+ if (d->nssused > 0 && (d->ssets[0].flags&STARTER))
ss = &d->ssets[0];
- else
- { /* no, must (re)build it */
+ else { /* no, must (re)build it */
ss = getvacant(v, d, start, start);
for (i = 0; i < d->wordsper; i++)
ss->states[i] = 0;
BSET(ss->states, d->cnfa->pre);
ss->hash = HASH(ss->states, d->wordsper);
assert(d->cnfa->pre != d->cnfa->post);
- ss->flags = STARTER | LOCKED | NOPROGRESS;
+ ss->flags = STARTER|LOCKED|NOPROGRESS;
/* lastseen dealt with below */
}
}
/*
- * miss - handle a cache miss
+ - miss - handle a cache miss
+ ^ static struct sset *miss(struct vars *, struct dfa *, struct sset *,
+ ^ pcolor, chr *, chr *);
*/
-static struct sset * /* NULL if goes to empty set */
-miss(struct vars * v, /* used only for debug flags */
- struct dfa * d,
- struct sset * css,
- pcolor co,
- chr *cp, /* next chr */
- chr *start) /* where the attempt got started */
+static struct sset * /* NULL if goes to empty set */
+miss(v, d, css, co, cp, start)
+struct vars *v; /* used only for debug flags */
+struct dfa *d;
+struct sset *css;
+pcolor co;
+chr *cp; /* next chr */
+chr *start; /* where the attempt got started */
{
struct cnfa *cnfa = d->cnfa;
- int i;
- unsigned h;
+ int i;
+ unsigned h;
struct carc *ca;
struct sset *p;
- int ispost;
- int noprogress;
- int gotstate;
- int dolacons;
- int sawlacons;
+ int ispost;
+ int noprogress;
+ int gotstate;
+ int dolacons;
+ int sawlacons;
/* for convenience, we can be called even if it might not be a miss */
- if (css->outs[co] != NULL)
- {
+ if (css->outs[co] != NULL) {
FDEBUG(("hit\n"));
return css->outs[co];
}
gotstate = 0;
for (i = 0; i < d->nstates; i++)
if (ISBSET(css->states, i))
- for (ca = cnfa->states[i] + 1; ca->co != COLORLESS; ca++)
- if (ca->co == co)
- {
+ for (ca = cnfa->states[i]+1; ca->co != COLORLESS; ca++)
+ if (ca->co == co) {
BSET(d->work, ca->to);
gotstate = 1;
if (ca->to == cnfa->post)
noprogress = 0;
FDEBUG(("%d -> %d\n", i, ca->to));
}
- dolacons = (gotstate) ? (cnfa->flags & HASLACONS) : 0;
+ dolacons = (gotstate) ? (cnfa->flags&HASLACONS) : 0;
sawlacons = 0;
- while (dolacons)
- { /* transitive closure */
+ while (dolacons) { /* transitive closure */
dolacons = 0;
for (i = 0; i < d->nstates; i++)
if (ISBSET(d->work, i))
- for (ca = cnfa->states[i] + 1; ca->co != COLORLESS;
- ca++)
- {
+ for (ca = cnfa->states[i]+1; ca->co != COLORLESS;
+ ca++) {
if (ca->co <= cnfa->ncolors)
- continue; /* NOTE CONTINUE */
+ continue; /* NOTE CONTINUE */
sawlacons = 1;
if (ISBSET(d->work, ca->to))
- continue; /* NOTE CONTINUE */
+ continue; /* NOTE CONTINUE */
if (!lacon(v, cnfa, cp, ca->co))
- continue; /* NOTE CONTINUE */
+ continue; /* NOTE CONTINUE */
BSET(d->work, ca->to);
dolacons = 1;
if (ca->to == cnfa->post)
/* next, is that in the cache? */
for (p = d->ssets, i = d->nssused; i > 0; p++, i--)
- if (HIT(h, d->work, p, d->wordsper))
- {
+ if (HIT(h, d->work, p, d->wordsper)) {
FDEBUG(("cached c%d\n", p - d->ssets));
- break; /* NOTE BREAK OUT */
+ break; /* NOTE BREAK OUT */
}
- if (i == 0)
- { /* nope, need a new cache entry */
+ if (i == 0) { /* nope, need a new cache entry */
p = getvacant(v, d, cp, start);
assert(p != css);
for (i = 0; i < d->wordsper; i++)
/* lastseen to be dealt with by caller */
}
- if (!sawlacons)
- { /* lookahead conds. always cache miss */
+ if (!sawlacons) { /* lookahead conds. always cache miss */
FDEBUG(("c%d[%d]->c%d\n", css - d->ssets, co, p - d->ssets));
css->outs[co] = p;
css->inchain[co] = p->ins;
p->ins.ss = css;
- p->ins.co = (color) co;
+ p->ins.co = (color)co;
}
return p;
}
/*
- * lacon - lookahead-constraint checker for miss()
+ - lacon - lookahead-constraint checker for miss()
+ ^ static int lacon(struct vars *, struct cnfa *, chr *, pcolor);
*/
-static int /* predicate: constraint satisfied? */
-lacon(struct vars * v,
- struct cnfa * pcnfa, /* parent cnfa */
- chr *cp,
- pcolor co) /* "color" of the lookahead constraint */
+static int /* predicate: constraint satisfied? */
+lacon(v, pcnfa, cp, co)
+struct vars *v;
+struct cnfa *pcnfa; /* parent cnfa */
+chr *cp;
+pcolor co; /* "color" of the lookahead constraint */
{
- int n;
+ int n;
struct subre *sub;
struct dfa *d;
struct smalldfa sd;
- chr *end;
+ chr *end;
n = co - pcnfa->ncolors;
assert(n < v->g->nlacons && v->g->lacons != NULL);
FDEBUG(("=== testing lacon %d\n", n));
sub = &v->g->lacons[n];
d = newdfa(v, &sub->cnfa, &v->g->cmap, &sd);
- if (d == NULL)
- {
+ if (d == NULL) {
ERR(REG_ESPACE);
return 0;
}
- end = longest(v, d, cp, v->stop, (int *) NULL);
+ end = longest(v, d, cp, v->stop, (int *)NULL);
freedfa(d);
FDEBUG(("=== lacon %d match %d\n", n, (end != NULL)));
return (sub->subno) ? (end != NULL) : (end == NULL);
}
/*
- * getvacant - get a vacant state set
+ - getvacant - get a vacant state set
* This routine clears out the inarcs and outarcs, but does not otherwise
* clear the innards of the state set -- that's up to the caller.
+ ^ static struct sset *getvacant(struct vars *, struct dfa *, chr *, chr *);
*/
static struct sset *
-getvacant(struct vars * v, /* used only for debug flags */
- struct dfa * d,
- chr *cp,
- chr *start)
+getvacant(v, d, cp, start)
+struct vars *v; /* used only for debug flags */
+struct dfa *d;
+chr *cp;
+chr *start;
{
- int i;
+ int i;
struct sset *ss;
struct sset *p;
struct arcp ap;
struct arcp lastap;
- color co;
+ color co;
ss = pickss(v, d, cp, start);
- assert(!(ss->flags & LOCKED));
+ assert(!(ss->flags&LOCKED));
/* clear out its inarcs, including self-referential ones */
ap = ss->ins;
- while ((p = ap.ss) != NULL)
- {
+ while ((p = ap.ss) != NULL) {
co = ap.co;
- FDEBUG(("zapping c%d's %ld outarc\n", p - d->ssets, (long) co));
+ FDEBUG(("zapping c%d's %ld outarc\n", p - d->ssets, (long)co));
p->outs[co] = NULL;
ap = p->inchain[co];
- p->inchain[co].ss = NULL; /* paranoia */
+ p->inchain[co].ss = NULL; /* paranoia */
}
ss->ins.ss = NULL;
/* take it off the inarc chains of the ssets reached by its outarcs */
- for (i = 0; i < d->ncolors; i++)
- {
+ for (i = 0; i < d->ncolors; i++) {
p = ss->outs[i];
assert(p != ss); /* not self-referential */
if (p == NULL)
- continue; /* NOTE CONTINUE */
+ continue; /* NOTE CONTINUE */
FDEBUG(("del outarc %d from c%d's in chn\n", i, p - d->ssets));
if (p->ins.ss == ss && p->ins.co == i)
p->ins = ss->inchain[i];
- else
- {
+ else {
assert(p->ins.ss != NULL);
for (ap = p->ins; ap.ss != NULL &&
- !(ap.ss == ss && ap.co == i);
- ap = ap.ss->inchain[ap.co])
+ !(ap.ss == ss && ap.co == i);
+ ap = ap.ss->inchain[ap.co])
lastap = ap;
assert(ap.ss != NULL);
lastap.ss->inchain[lastap.co] = ss->inchain[i];
}
/* if ss was a success state, may need to remember location */
- if ((ss->flags & POSTSTATE) && ss->lastseen != d->lastpost &&
- (d->lastpost == NULL || d->lastpost < ss->lastseen))
+ if ((ss->flags&POSTSTATE) && ss->lastseen != d->lastpost &&
+ (d->lastpost == NULL || d->lastpost < ss->lastseen))
d->lastpost = ss->lastseen;
/* likewise for a no-progress state */
- if ((ss->flags & NOPROGRESS) && ss->lastseen != d->lastnopr &&
- (d->lastnopr == NULL || d->lastnopr < ss->lastseen))
+ if ((ss->flags&NOPROGRESS) && ss->lastseen != d->lastnopr &&
+ (d->lastnopr == NULL || d->lastnopr < ss->lastseen))
d->lastnopr = ss->lastseen;
return ss;
}
/*
- * pickss - pick the next stateset to be used
+ - pickss - pick the next stateset to be used
+ ^ static struct sset *pickss(struct vars *, struct dfa *, chr *, chr *);
*/
static struct sset *
-pickss(struct vars * v, /* used only for debug flags */
- struct dfa * d,
- chr *cp,
- chr *start)
+pickss(v, d, cp, start)
+struct vars *v; /* used only for debug flags */
+struct dfa *d;
+chr *cp;
+chr *start;
{
- int i;
+ int i;
struct sset *ss;
struct sset *end;
- chr *ancient;
+ chr *ancient;
/* shortcut for cases where cache isn't full */
- if (d->nssused < d->nssets)
- {
+ if (d->nssused < d->nssets) {
i = d->nssused;
d->nssused++;
ss = &d->ssets[i];
ss->ins.co = WHITE; /* give it some value */
ss->outs = &d->outsarea[i * d->ncolors];
ss->inchain = &d->incarea[i * d->ncolors];
- for (i = 0; i < d->ncolors; i++)
- {
+ for (i = 0; i < d->ncolors; i++) {
ss->outs[i] = NULL;
ss->inchain[i].ss = NULL;
}
}
/* look for oldest, or old enough anyway */
- if (cp - start > d->nssets * 2 / 3) /* oldest 33% are expendable */
- ancient = cp - d->nssets * 2 / 3;
+ if (cp - start > d->nssets*2/3) /* oldest 33% are expendable */
+ ancient = cp - d->nssets*2/3;
else
ancient = start;
for (ss = d->search, end = &d->ssets[d->nssets]; ss < end; ss++)
if ((ss->lastseen == NULL || ss->lastseen < ancient) &&
- !(ss->flags & LOCKED))
- {
+ !(ss->flags&LOCKED)) {
d->search = ss + 1;
FDEBUG(("replacing c%d\n", ss - d->ssets));
return ss;
}
for (ss = d->ssets, end = d->search; ss < end; ss++)
if ((ss->lastseen == NULL || ss->lastseen < ancient) &&
- !(ss->flags & LOCKED))
- {
+ !(ss->flags&LOCKED)) {
d->search = ss + 1;
FDEBUG(("replacing c%d\n", ss - d->ssets));
return ss;
projects / wxWidgets.git / blobdiff