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authorstanton <stanton>1999-04-16 00:46:29 (GMT)
committerstanton <stanton>1999-04-16 00:46:29 (GMT)
commit97464e6cba8eb0008cf2727c15718671992b913f (patch)
treece9959f2747257d98d52ec8d18bf3b0de99b9535 /generic/regcomp.c
parenta8c96ddb94d1483a9de5e340b740cb74ef6cafa7 (diff)
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merged tcl 8.1 branch back into the main trunk
Diffstat (limited to 'generic/regcomp.c')
-rw-r--r--generic/regcomp.c2124
1 files changed, 2124 insertions, 0 deletions
diff --git a/generic/regcomp.c b/generic/regcomp.c
new file mode 100644
index 0000000..8e1b61c
--- /dev/null
+++ b/generic/regcomp.c
@@ -0,0 +1,2124 @@
+/*
+ * re_*comp and friends - compile REs
+ * This file #includes several others (see the bottom).
+ */
+
+#include "regguts.h"
+
+/*
+ * forward declarations, up here so forward datatypes etc. are defined early
+ */
+/* =====^!^===== begin forwards =====^!^===== */
+/* automatically gathered by fwd; do not hand-edit */
+/* === regcomp.c === */
+int compile _ANSI_ARGS_((regex_t *, CONST chr *, size_t, int));
+static VOID moresubs _ANSI_ARGS_((struct vars *, int));
+static int freev _ANSI_ARGS_((struct vars *, int));
+static VOID makescan _ANSI_ARGS_((struct vars *, struct nfa *));
+static struct subre *parse _ANSI_ARGS_((struct vars *, int, int, struct state *, struct state *));
+static struct subre *parsebranch _ANSI_ARGS_((struct vars *, int, int, struct state *, struct state *, int));
+static VOID parseqatom _ANSI_ARGS_((struct vars *, int, int, struct state *, struct state *, struct subre *));
+static VOID nonword _ANSI_ARGS_((struct vars *, int, struct state *, struct state *));
+static VOID word _ANSI_ARGS_((struct vars *, int, struct state *, struct state *));
+static int scannum _ANSI_ARGS_((struct vars *));
+static VOID repeat _ANSI_ARGS_((struct vars *, struct state *, struct state *, int, int));
+static VOID bracket _ANSI_ARGS_((struct vars *, struct state *, struct state *));
+static VOID cbracket _ANSI_ARGS_((struct vars *, struct state *, struct state *));
+static VOID brackpart _ANSI_ARGS_((struct vars *, struct state *, struct state *));
+static chr *scanplain _ANSI_ARGS_((struct vars *));
+static VOID leaders _ANSI_ARGS_((struct vars *, struct cvec *));
+static VOID onechr _ANSI_ARGS_((struct vars *, pchr, struct state *, struct state *));
+static VOID dovec _ANSI_ARGS_((struct vars *, struct cvec *, struct state *, struct state *));
+static celt nextleader _ANSI_ARGS_((struct vars *, pchr, pchr));
+static VOID wordchrs _ANSI_ARGS_((struct vars *));
+static struct subre *subre _ANSI_ARGS_((struct vars *, int, int, struct state *, struct state *));
+static VOID freesubre _ANSI_ARGS_((struct vars *, struct subre *));
+static VOID freesrnode _ANSI_ARGS_((struct vars *, struct subre *));
+static VOID optst _ANSI_ARGS_((struct vars *, struct subre *));
+static int numst _ANSI_ARGS_((struct subre *, int));
+static VOID markst _ANSI_ARGS_((struct subre *));
+static VOID cleanst _ANSI_ARGS_((struct vars *));
+static int nfatree _ANSI_ARGS_((struct vars *, struct subre *, FILE *));
+static int nfanode _ANSI_ARGS_((struct vars *, struct subre *, FILE *));
+static int newlacon _ANSI_ARGS_((struct vars *, struct state *, struct state *, int));
+static VOID freelacons _ANSI_ARGS_((struct subre *, int));
+static VOID rfree _ANSI_ARGS_((regex_t *));
+static VOID dump _ANSI_ARGS_((regex_t *, FILE *));
+static VOID dumpst _ANSI_ARGS_((struct subre *, FILE *, int));
+static VOID stdump _ANSI_ARGS_((struct subre *, FILE *, int, int));
+/* === regc_lex.c === */
+static VOID lexstart _ANSI_ARGS_((struct vars *));
+static VOID prefixes _ANSI_ARGS_((struct vars *));
+static VOID lexnest _ANSI_ARGS_((struct vars *, chr *, chr *));
+static VOID lexword _ANSI_ARGS_((struct vars *));
+static int next _ANSI_ARGS_((struct vars *));
+static int lexescape _ANSI_ARGS_((struct vars *));
+static chr lexdigits _ANSI_ARGS_((struct vars *, int, int, int));
+static int brenext _ANSI_ARGS_((struct vars *, pchr));
+static VOID skip _ANSI_ARGS_((struct vars *));
+static chr newline _ANSI_ARGS_((NOPARMS));
+static chr chrnamed _ANSI_ARGS_((struct vars *, chr *, chr *, pchr));
+/* === regc_color.c === */
+static VOID initcm _ANSI_ARGS_((struct vars *, struct colormap *));
+static VOID freecm _ANSI_ARGS_((struct colormap *));
+static VOID cmtreefree _ANSI_ARGS_((struct colormap *, union tree *, int));
+static color setcolor _ANSI_ARGS_((struct colormap *, pchr, pcolor));
+static color maxcolor _ANSI_ARGS_((struct colormap *));
+static color newcolor _ANSI_ARGS_((struct colormap *));
+static VOID freecolor _ANSI_ARGS_((struct colormap *, pcolor));
+static color pseudocolor _ANSI_ARGS_((struct colormap *));
+static color subcolor _ANSI_ARGS_((struct colormap *, pchr c));
+static color newsub _ANSI_ARGS_((struct colormap *, pcolor));
+static VOID subrange _ANSI_ARGS_((struct vars *, pchr, pchr, struct state *, struct state *));
+static VOID subblock _ANSI_ARGS_((struct vars *, pchr, struct state *, struct state *));
+static VOID okcolors _ANSI_ARGS_((struct nfa *, struct colormap *));
+static VOID colorchain _ANSI_ARGS_((struct colormap *, struct arc *));
+static VOID uncolorchain _ANSI_ARGS_((struct colormap *, struct arc *));
+#if 0
+static int singleton _ANSI_ARGS_((struct colormap *, pchr c));
+#endif
+static VOID rainbow _ANSI_ARGS_((struct nfa *, struct colormap *, int, pcolor, struct state *, struct state *));
+static VOID colorcomplement _ANSI_ARGS_((struct nfa *, struct colormap *, int, struct state *, struct state *, struct state *));
+#ifdef REG_DEBUG
+static VOID dumpcolors _ANSI_ARGS_((struct colormap *, FILE *));
+static VOID fillcheck _ANSI_ARGS_((struct colormap *, union tree *, int, FILE *));
+static VOID dumpchr _ANSI_ARGS_((pchr, FILE *));
+#endif
+/* === regc_nfa.c === */
+static struct nfa *newnfa _ANSI_ARGS_((struct vars *, struct colormap *, struct nfa *));
+static VOID freenfa _ANSI_ARGS_((struct nfa *));
+static struct state *newfstate _ANSI_ARGS_((struct nfa *, int flag));
+static struct state *newstate _ANSI_ARGS_((struct nfa *));
+static VOID dropstate _ANSI_ARGS_((struct nfa *, struct state *));
+static VOID freestate _ANSI_ARGS_((struct nfa *, struct state *));
+static VOID destroystate _ANSI_ARGS_((struct nfa *, struct state *));
+static VOID newarc _ANSI_ARGS_((struct nfa *, int, pcolor, struct state *, struct state *));
+static struct arc *allocarc _ANSI_ARGS_((struct nfa *, struct state *));
+static VOID freearc _ANSI_ARGS_((struct nfa *, struct arc *));
+static struct arc *findarc _ANSI_ARGS_((struct state *, int, pcolor));
+static VOID cparc _ANSI_ARGS_((struct nfa *, struct arc *, struct state *, struct state *));
+static VOID moveins _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID copyins _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID moveouts _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID copyouts _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID cloneouts _ANSI_ARGS_((struct nfa *, struct state *, struct state *, struct state *, int));
+static VOID delsub _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID deltraverse _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID dupnfa _ANSI_ARGS_((struct nfa *, struct state *, struct state *, struct state *, struct state *));
+static VOID duptraverse _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID cleartraverse _ANSI_ARGS_((struct nfa *, struct state *));
+static VOID specialcolors _ANSI_ARGS_((struct nfa *));
+static int optimize _ANSI_ARGS_((struct nfa *, FILE *));
+static VOID pullback _ANSI_ARGS_((struct nfa *, FILE *));
+static int pull _ANSI_ARGS_((struct nfa *, struct arc *));
+static VOID pushfwd _ANSI_ARGS_((struct nfa *, FILE *));
+static int push _ANSI_ARGS_((struct nfa *, struct arc *));
+#define INCOMPATIBLE 1 /* destroys arc */
+#define SATISFIED 2 /* constraint satisfied */
+#define COMPATIBLE 3 /* compatible but not satisfied yet */
+static int combine _ANSI_ARGS_((struct arc *, struct arc *));
+static VOID fixempties _ANSI_ARGS_((struct nfa *, FILE *));
+static int unempty _ANSI_ARGS_((struct nfa *, struct arc *));
+static VOID cleanup _ANSI_ARGS_((struct nfa *));
+static VOID markreachable _ANSI_ARGS_((struct nfa *, struct state *, struct state *, struct state *));
+static VOID markcanreach _ANSI_ARGS_((struct nfa *, struct state *, struct state *, struct state *));
+static int analyze _ANSI_ARGS_((struct nfa *));
+static VOID compact _ANSI_ARGS_((struct nfa *, struct cnfa *));
+static VOID carcsort _ANSI_ARGS_((struct carc *, struct carc *));
+static VOID freecnfa _ANSI_ARGS_((struct cnfa *));
+static VOID dumpnfa _ANSI_ARGS_((struct nfa *, FILE *));
+#ifdef REG_DEBUG
+static VOID dumpstate _ANSI_ARGS_((struct state *, FILE *));
+static VOID dumparcs _ANSI_ARGS_((struct state *, FILE *));
+static int dumprarcs _ANSI_ARGS_((struct arc *, struct state *, FILE *, int));
+static VOID dumparc _ANSI_ARGS_((struct arc *, struct state *, FILE *));
+#endif
+static VOID dumpcnfa _ANSI_ARGS_((struct cnfa *, FILE *));
+#ifdef REG_DEBUG
+static VOID dumpcstate _ANSI_ARGS_((int, struct carc *, struct cnfa *, FILE *));
+#endif
+/* === regc_cvec.c === */
+static struct cvec *newcvec _ANSI_ARGS_((int, int, int));
+static struct cvec *clearcvec _ANSI_ARGS_((struct cvec *));
+static VOID addchr _ANSI_ARGS_((struct cvec *, pchr));
+static VOID addrange _ANSI_ARGS_((struct cvec *, pchr, pchr));
+#ifdef USE_MCCE
+static VOID addmcce _ANSI_ARGS_((struct cvec *, chr *, chr *));
+#endif
+static int haschr _ANSI_ARGS_((struct cvec *, pchr));
+static struct cvec *getcvec _ANSI_ARGS_((struct vars *, int, int, int));
+static VOID freecvec _ANSI_ARGS_((struct cvec *));
+/* === regc_locale.c === */
+static int nmcces _ANSI_ARGS_((struct vars *));
+static int nleaders _ANSI_ARGS_((struct vars *));
+static struct cvec *allmcces _ANSI_ARGS_((struct vars *, struct cvec *));
+static celt element _ANSI_ARGS_((struct vars *, chr *, chr *));
+static struct cvec *range _ANSI_ARGS_((struct vars *, celt, celt, int));
+static int before _ANSI_ARGS_((celt, celt));
+static struct cvec *eclass _ANSI_ARGS_((struct vars *, celt, int));
+static struct cvec *cclass _ANSI_ARGS_((struct vars *, chr *, chr *, int));
+static struct cvec *allcases _ANSI_ARGS_((struct vars *, pchr));
+static int cmp _ANSI_ARGS_((CONST chr *, CONST chr *, size_t));
+static int casecmp _ANSI_ARGS_((CONST chr *, CONST chr *, size_t));
+/* automatically gathered by fwd; do not hand-edit */
+/* =====^!^===== end forwards =====^!^===== */
+
+
+
+/* internal variables, bundled for easy passing around */
+struct vars {
+ regex_t *re;
+ chr *now; /* scan pointer into string */
+ chr *stop; /* end of string */
+ chr *savenow; /* saved now and stop for "subroutine call" */
+ chr *savestop;
+ int err; /* error code (0 if none) */
+ int cflags; /* copy of compile flags */
+ int lasttype; /* type of previous token */
+ int nexttype; /* type of next token */
+ chr nextvalue; /* value (if any) of next token */
+ int lexcon; /* lexical context type (see lex.c) */
+ int nsubexp; /* subexpression count */
+ struct subre **subs; /* subRE pointer vector */
+ size_t nsubs; /* length of vector */
+ struct subre *sub10[10]; /* initial vector, enough for most */
+ struct nfa *nfa; /* the NFA */
+ struct colormap *cm; /* character color map */
+ color nlcolor; /* color of newline */
+ struct state *wordchrs; /* state in nfa holding word-char outarcs */
+ struct subre *tree; /* subexpression tree */
+ struct subre *treechain; /* all tree nodes allocated */
+ struct subre *treefree; /* any free tree nodes */
+ int ntree; /* number of tree nodes */
+ struct cvec *cv; /* interface cvec */
+ struct cvec *cv2; /* utility cvec */
+ struct cvec *mcces; /* collating-element information */
+# define ISCELEADER(v,c) (v->mcces != NULL && haschr(v->mcces, (c)))
+ struct state *mccepbegin; /* in nfa, start of MCCE prototypes */
+ struct state *mccepend; /* in nfa, end of MCCE prototypes */
+ struct subre *lacons; /* lookahead-constraint vector */
+ int nlacons; /* size of lacons */
+ int usedshorter; /* used short-preferring quantifiers */
+ int unmatchable; /* can never match */
+};
+
+/* parsing macros; most know that `v' is the struct vars pointer */
+#define NEXT() (next(v)) /* advance by one token */
+#define SEE(t) (v->nexttype == (t)) /* is next token this? */
+#define EAT(t) (SEE(t) && next(v)) /* if next is this, swallow it */
+#define VISERR(vv) ((vv)->err != 0) /* have we seen an error yet? */
+#define ISERR() VISERR(v)
+#define VERR(vv,e) ((vv)->nexttype = EOS, ((vv)->err) ? (vv)->err :\
+ ((vv)->err = (e)))
+#define ERR(e) VERR(v, e) /* record an error */
+#define NOERR() {if (ISERR()) return;} /* if error seen, return */
+#define NOERRN() {if (ISERR()) return NULL;} /* NOERR with retval */
+#define NOERRZ() {if (ISERR()) return 0;} /* NOERR with retval */
+#define INSIST(c, e) ((c) ? 0 : ERR(e)) /* if condition false, error */
+#define NOTE(b) (v->re->re_info |= (b)) /* note visible condition */
+#define EMPTYARC(x, y) newarc(v->nfa, EMPTY, 0, x, y)
+
+/* token type codes, some also used as NFA arc types */
+#define EMPTY 'n' /* no token present */
+#define EOS 'e' /* end of string */
+#define PLAIN 'p' /* ordinary character */
+#define DIGIT 'd' /* digit (in bound) */
+#define BACKREF 'b' /* back reference */
+#define COLLEL 'I' /* start of [. */
+#define ECLASS 'E' /* start of [= */
+#define CCLASS 'C' /* start of [: */
+#define END 'X' /* end of [. [= [: */
+#define RANGE 'R' /* - within [] which might be range delim. */
+#define LACON 'L' /* lookahead constraint subRE */
+#define AHEAD 'a' /* color-lookahead arc */
+#define BEHIND 'r' /* color-lookbehind arc */
+#define WBDRY 'w' /* word boundary constraint */
+#define NWBDRY 'W' /* non-word-boundary constraint */
+#define SBEGIN 'A' /* beginning of string (even if not BOL) */
+#define SEND 'Z' /* end of string (even if not EOL) */
+#define PREFER 'P' /* length preference */
+
+/* is an arc colored, and hence on a color chain? */
+#define COLORED(a) ((a)->type == PLAIN || (a)->type == AHEAD || \
+ (a)->type == BEHIND)
+
+
+
+/* static function list */
+static struct fns functions = {
+ rfree, /* regfree insides */
+};
+
+
+
+/*
+ - compile - compile regular expression
+ ^ int compile(regex_t *, CONST chr *, size_t, int);
+ */
+int
+compile(re, string, len, flags)
+regex_t *re;
+CONST chr *string;
+size_t len;
+int flags;
+{
+ struct vars var;
+ struct vars *v = &var;
+ struct guts *g;
+ int i;
+ size_t j;
+ FILE *debug = (flags&REG_PROGRESS) ? stdout : (FILE *)NULL;
+# define CNOERR() { if (ISERR()) return freev(v, v->err); }
+
+ /* sanity checks */
+
+ if (re == NULL || string == NULL)
+ return REG_INVARG;
+ if ((flags&REG_QUOTE) &&
+ (flags&(REG_ADVANCED|REG_EXPANDED|REG_NEWLINE)))
+ return REG_INVARG;
+ if (!(flags&REG_EXTENDED) && (flags&REG_ADVF))
+ return REG_INVARG;
+
+ /* initial setup (after which freev() is callable) */
+ v->re = re;
+ v->now = (chr *)string;
+ v->stop = v->now + len;
+ v->savenow = v->savestop = NULL;
+ v->err = 0;
+ v->cflags = flags;
+ v->nsubexp = 0;
+ v->subs = v->sub10;
+ v->nsubs = 10;
+ for (j = 0; j < v->nsubs; j++)
+ v->subs[j] = NULL;
+ v->nfa = NULL;
+ v->cm = NULL;
+ v->nlcolor = COLORLESS;
+ v->wordchrs = NULL;
+ v->tree = NULL;
+ v->treechain = NULL;
+ v->treefree = NULL;
+ v->cv = NULL;
+ v->cv2 = NULL;
+ v->mcces = NULL;
+ v->lacons = NULL;
+ v->nlacons = 0;
+ re->re_magic = REMAGIC;
+ re->re_info = 0; /* bits get set during parse */
+ re->re_csize = sizeof(chr);
+ re->re_guts = NULL;
+ re->re_fns = VS(&functions);
+
+ /* more complex setup, malloced things */
+ re->re_guts = VS(MALLOC(sizeof(struct guts)));
+ if (re->re_guts == NULL)
+ return freev(v, REG_ESPACE);
+ g = (struct guts *)re->re_guts;
+ g->tree = NULL;
+ initcm(v, &g->cmap);
+ v->cm = &g->cmap;
+ g->lacons = NULL;
+ g->nlacons = 0;
+ ZAPCNFA(g->search);
+ v->nfa = newnfa(v, v->cm, (struct nfa *)NULL);
+ CNOERR();
+ v->cv = newcvec(100, 20, 10);
+ if (v->cv == NULL)
+ return freev(v, REG_ESPACE);
+ i = nmcces(v);
+ if (i > 0) {
+ v->mcces = newcvec(nleaders(v), 0, i);
+ CNOERR();
+ v->mcces = allmcces(v, v->mcces);
+ leaders(v, v->mcces);
+ }
+ CNOERR();
+
+ /* parsing */
+ lexstart(v); /* also handles prefixes */
+ if ((v->cflags&REG_NLSTOP) || (v->cflags&REG_NLANCH)) {
+ /* assign newline a unique color */
+ v->nlcolor = subcolor(v->cm, newline());
+ okcolors(v->nfa, v->cm);
+ }
+ CNOERR();
+ v->tree = parse(v, EOS, PLAIN, v->nfa->init, v->nfa->final);
+ assert(SEE(EOS)); /* even if error; ISERR() => SEE(EOS) */
+ CNOERR();
+ assert(v->tree != NULL);
+
+ /* finish setup of nfa and its subre tree */
+ specialcolors(v->nfa);
+ CNOERR();
+ if (debug != NULL) {
+ dumpnfa(v->nfa, debug);
+ dumpst(v->tree, debug, 1);
+ }
+ v->usedshorter = 0;
+ v->unmatchable = 0;
+ optst(v, v->tree);
+ v->ntree = numst(v->tree, 1);
+ markst(v->tree);
+ cleanst(v);
+ if (debug != NULL) {
+ fprintf(debug, "-->\n");
+ dumpst(v->tree, debug, 1);
+ }
+
+ /* build compacted NFAs for tree, lacons, fast search */
+ re->re_info |= nfatree(v, v->tree, debug);
+ if (debug != NULL) {
+ fprintf(debug, "---->\n");
+ dumpst(v->tree, debug, 1);
+ }
+ CNOERR();
+ if (re->re_info&REG_UIMPOSSIBLE)
+ v->unmatchable = 1;
+ assert(v->nlacons == 0 || v->lacons != NULL);
+ for (i = 1; i < v->nlacons; i++)
+ nfanode(v, &v->lacons[i], debug);
+ CNOERR();
+ (DISCARD)optimize(v->nfa, debug);
+ CNOERR();
+ makescan(v, v->nfa);
+ CNOERR();
+ compact(v->nfa, &g->search);
+ CNOERR();
+
+ /* looks okay, package it up */
+ re->re_nsub = v->nsubexp;
+ v->re = NULL; /* freev no longer frees re */
+ g->magic = GUTSMAGIC;
+ g->cflags = v->cflags;
+ g->info = re->re_info;
+ g->nsub = re->re_nsub;
+ g->tree = v->tree;
+ v->tree = NULL;
+ g->ntree = v->ntree;
+ g->compare = (v->cflags&REG_ICASE) ? casecmp : cmp;
+ g->lacons = v->lacons;
+ v->lacons = NULL;
+ g->nlacons = v->nlacons;
+ g->usedshorter = v->usedshorter;
+ g->unmatchable = v->unmatchable;
+
+ if (flags&REG_DUMP)
+ dump(re, stdout);
+
+ assert(v->err == 0);
+ return freev(v, 0);
+}
+
+/*
+ - moresubs - enlarge subRE vector
+ ^ static VOID moresubs(struct vars *, int);
+ */
+static VOID
+moresubs(v, wanted)
+struct vars *v;
+int wanted; /* want enough room for this one */
+{
+ struct subre **p;
+ size_t n;
+
+ assert(wanted > 0 && (size_t)wanted >= v->nsubs);
+ n = (size_t)wanted * 3 / 2 + 1;
+ if (v->subs == v->sub10) {
+ p = (struct subre **)MALLOC(n * sizeof(struct subre *));
+ if (p != NULL)
+ memcpy(VS(p), VS(v->subs),
+ v->nsubs * sizeof(struct subre *));
+ } else
+ p = (struct subre**)REALLOC(v->subs, n*sizeof(struct subre *));
+ if (p == NULL) {
+ ERR(REG_ESPACE);
+ return;
+ }
+ v->subs = p;
+ for (p = &v->subs[v->nsubs]; v->nsubs < n; p++, v->nsubs++)
+ *p = NULL;
+ assert(v->nsubs == n);
+ assert((size_t)wanted < v->nsubs);
+}
+
+/*
+ - freev - free vars struct's substructures where necessary
+ * Optionally does error-number setting, and always returns error code
+ * (if any), to make error-handling code terser.
+ ^ static int freev(struct vars *, int);
+ */
+static int
+freev(v, err)
+struct vars *v;
+int err;
+{
+ if (v->re != NULL)
+ rfree(v->re);
+ if (v->subs != v->sub10)
+ FREE(v->subs);
+ if (v->nfa != NULL)
+ freenfa(v->nfa);
+ if (v->tree != NULL)
+ freesubre(v, v->tree);
+ if (v->treechain != NULL)
+ cleanst(v);
+ if (v->cv != NULL)
+ freecvec(v->cv);
+ if (v->cv2 != NULL)
+ freecvec(v->cv2);
+ if (v->mcces != NULL)
+ freecvec(v->mcces);
+ if (v->lacons != NULL)
+ freelacons(v->lacons, v->nlacons);
+ ERR(err); /* nop if err==0 */
+
+ return v->err;
+}
+
+/*
+ - makescan - turn an NFA into a fast-scan NFA (implicit prepend of .*?)
+ * NFA must have been optimize()d already.
+ ^ static VOID makescan(struct vars *, struct nfa *);
+ */
+static VOID
+makescan(v, nfa)
+struct vars *v;
+struct nfa *nfa;
+{
+ struct arc *a;
+ struct arc *b;
+ struct state *pre = nfa->pre;
+ struct state *s;
+ struct state *s2;
+ struct state *slist;
+
+ /* no loops are needed if it's anchored */
+ for (a = pre->outs; a != NULL; a = a->outchain) {
+ assert(a->type == PLAIN);
+ if (a->co != nfa->bos[0] && a->co != nfa->bos[1])
+ break;
+ }
+ if (a != NULL) {
+ /* add implicit .* in front */
+ rainbow(nfa, v->cm, PLAIN, COLORLESS, pre, pre);
+
+ /* and ^* and \Z* too -- not always necessary, but harmless */
+ newarc(nfa, PLAIN, nfa->bos[0], pre, pre);
+ newarc(nfa, PLAIN, nfa->bos[1], pre, pre);
+ }
+
+ /*
+ * Now here's the subtle part. Because many REs have no lookback
+ * constraints, often knowing when you were in the pre state tells
+ * you little; it's the next state(s) that are informative. But
+ * some of them may have other inarcs, i.e. it may be possible to
+ * make actual progress and then return to one of them. We must
+ * de-optimize such cases, splitting each such state into progress
+ * and no-progress states.
+ */
+
+ /* first, make a list of the states */
+ slist = NULL;
+ for (a = pre->outs; a != NULL; a = a->outchain) {
+ s = a->to;
+ for (b = s->ins; b != NULL; b = b->inchain)
+ if (b->from != pre)
+ break;
+ if (b != NULL) { /* must be split */
+ s->tmp = slist;
+ slist = s;
+ }
+ }
+
+ /* do the splits */
+ for (s = slist; s != NULL; s = s2) {
+ s2 = newstate(nfa);
+ copyouts(nfa, s, s2);
+ for (a = s->ins; a != NULL; a = b) {
+ b = a->inchain;
+ if (a->from != pre) {
+ cparc(nfa, a, a->from, s2);
+ freearc(nfa, a);
+ }
+ }
+ s2 = s->tmp;
+ s->tmp = NULL; /* clean up while we're at it */
+ }
+}
+
+/*
+ - parse - parse an RE
+ * This is actually just the top level, which parses a bunch of branches
+ * tied together with '|'. They appear in the tree as the left children
+ * of a chain of '|' subres.
+ ^ static struct subre *parse(struct vars *, int, int, struct state *,
+ ^ struct state *);
+ */
+static struct subre *
+parse(v, stopper, type, init, final)
+struct vars *v;
+int stopper; /* EOS or ')' */
+int type; /* LACON (lookahead subRE) or PLAIN */
+struct state *init; /* initial state */
+struct state *final; /* final state */
+{
+ struct state *left; /* scaffolding for branch */
+ struct state *right;
+ struct subre *branches; /* top level */
+ struct subre *branch; /* current branch */
+ struct subre *t; /* temporary */
+ int firstbranch; /* is this the first branch? */
+
+ assert(stopper == ')' || stopper == EOS);
+
+ branches = subre(v, '|', LONGER, init, final);
+ NOERRN();
+ branch = branches;
+ firstbranch = 1;
+ do { /* a branch */
+ if (!firstbranch) {
+ /* need a place to hang it */
+ branch->right = subre(v, '|', LONGER, init, final);
+ NOERRN();
+ branch = branch->right;
+ }
+ firstbranch = 0;
+ left = newstate(v->nfa);
+ right = newstate(v->nfa);
+ NOERRN();
+ EMPTYARC(init, left);
+ EMPTYARC(right, final);
+ NOERRN();
+ branch->left = parsebranch(v, stopper, type, left, right, 0);
+ NOERRN();
+ branch->flags |= UP(branch->flags | branch->left->flags);
+ if ((branch->flags &~ branches->flags) != 0) /* new flags */
+ for (t = branches; t != branch; t = t->right)
+ t->flags |= branch->flags;
+ } while (EAT('|'));
+ assert(SEE(stopper) || SEE(EOS));
+
+ if (!SEE(stopper)) {
+ assert(stopper == ')' && SEE(EOS));
+ ERR(REG_EPAREN);
+ }
+
+ /* optimize out simple cases */
+ if (branch == branches) { /* only one branch */
+ assert(branch->right == NULL);
+ t = branch->left;
+ branch->left = NULL;
+ freesubre(v, branches);
+ branches = t;
+ } else if (!MESSY(branches->flags)) { /* no interesting innards */
+ freesubre(v, branches->left);
+ branches->left = NULL;
+ freesubre(v, branches->right);
+ branches->right = NULL;
+ branches->op = '=';
+ }
+
+ return branches;
+}
+
+/*
+ - parsebranch - parse one branch of an RE
+ * This mostly manages concatenation, working closely with parseqatom().
+ * Concatenated things are bundled up as much as possible, with separate
+ * ',' nodes introduced only when necessary due to substructure.
+ ^ static struct subre *parsebranch(struct vars *, int, int, struct state *,
+ ^ struct state *, int);
+ */
+static struct subre *
+parsebranch(v, stopper, type, left, right, partial)
+struct vars *v;
+int stopper; /* EOS or ')' */
+int type; /* LACON (lookahead subRE) or PLAIN */
+struct state *left; /* leftmost state */
+struct state *right; /* rightmost state */
+int partial; /* is this only part of a branch? */
+{
+ struct state *lp; /* left end of current construct */
+ int seencontent; /* is there anything in this branch yet? */
+ struct subre *t;
+
+ lp = left;
+ seencontent = 0;
+ t = subre(v, '=', 0, left, right); /* op '=' is tentative */
+ NOERRN();
+ while (!SEE('|') && !SEE(stopper) && !SEE(EOS)) {
+ if (seencontent) { /* implicit concat operator */
+ lp = newstate(v->nfa);
+ NOERRN();
+ moveins(v->nfa, right, lp);
+ }
+ seencontent = 1;
+
+ /* NB, recursion in parseqatom() may swallow rest of branch */
+ parseqatom(v, stopper, type, lp, right, t);
+ }
+
+ if (!seencontent) { /* empty branch */
+ if (!partial)
+ NOTE(REG_UUNSPEC);
+ assert(lp == left);
+ EMPTYARC(left, right);
+ }
+
+ return t;
+}
+
+/*
+ - parseqatom - parse one quantified atom or constraint of an RE
+ * The bookkeeping near the end cooperates very closely with parsebranch();
+ * in particular, it contains a recursion that can involve parsing the rest
+ * of the branch, making this function's name somewhat inaccurate.
+ ^ static VOID parseqatom(struct vars *, int, int, struct state *,
+ ^ struct state *, struct subre *);
+ */
+static VOID
+parseqatom(v, stopper, type, lp, rp, top)
+struct vars *v;
+int stopper; /* EOS or ')' */
+int type; /* LACON (lookahead subRE) or PLAIN */
+struct state *lp; /* left state to hang it on */
+struct state *rp; /* right state to hang it on */
+struct subre *top; /* subtree top */
+{
+ struct state *s; /* temporaries for new states */
+ struct state *s2;
+# define ARCV(t, val) newarc(v->nfa, t, val, lp, rp)
+ int m, n;
+ struct subre *atom; /* atom's subtree */
+ struct subre *t;
+ int cap; /* capturing parens? */
+ int pos; /* positive lookahead? */
+ int subno; /* capturing-parens or backref number */
+ int atomtype;
+ int qprefer; /* quantifier short/long preference */
+ int f;
+ struct subre **atomp; /* where the pointer to atom is */
+
+ /* initial bookkeeping */
+ atom = NULL;
+ assert(lp->nouts == 0); /* must string new code */
+ assert(rp->nins == 0); /* between lp and rp */
+ subno = 0; /* just to shut lint up */
+
+ /* an atom or constraint... */
+ atomtype = v->nexttype;
+ switch (atomtype) {
+ /* first, constraints, which end by returning */
+ case '^':
+ ARCV('^', 1);
+ if (v->cflags&REG_NLANCH)
+ ARCV(BEHIND, v->nlcolor);
+ NEXT();
+ return;
+ break;
+ case '$':
+ ARCV('$', 1);
+ if (v->cflags&REG_NLANCH)
+ ARCV(AHEAD, v->nlcolor);
+ NEXT();
+ return;
+ break;
+ case SBEGIN:
+ ARCV('^', 1); /* BOL */
+ ARCV('^', 0); /* or BOS */
+ NEXT();
+ return;
+ break;
+ case SEND:
+ ARCV('$', 1); /* EOL */
+ ARCV('$', 0); /* or EOS */
+ NEXT();
+ return;
+ break;
+ case '<':
+ wordchrs(v); /* does NEXT() */
+ s = newstate(v->nfa);
+ NOERR();
+ nonword(v, BEHIND, lp, s);
+ word(v, AHEAD, s, rp);
+ return;
+ break;
+ case '>':
+ wordchrs(v); /* does NEXT() */
+ s = newstate(v->nfa);
+ NOERR();
+ word(v, BEHIND, lp, s);
+ nonword(v, AHEAD, s, rp);
+ return;
+ break;
+ case WBDRY:
+ wordchrs(v); /* does NEXT() */
+ s = newstate(v->nfa);
+ NOERR();
+ nonword(v, BEHIND, lp, s);
+ word(v, AHEAD, s, rp);
+ s = newstate(v->nfa);
+ NOERR();
+ word(v, BEHIND, lp, s);
+ nonword(v, AHEAD, s, rp);
+ return;
+ break;
+ case NWBDRY:
+ wordchrs(v); /* does NEXT() */
+ s = newstate(v->nfa);
+ NOERR();
+ word(v, BEHIND, lp, s);
+ word(v, AHEAD, s, rp);
+ s = newstate(v->nfa);
+ NOERR();
+ nonword(v, BEHIND, lp, s);
+ nonword(v, AHEAD, s, rp);
+ return;
+ break;
+ case LACON: /* lookahead constraint */
+ pos = v->nextvalue;
+ NEXT();
+ s = newstate(v->nfa);
+ s2 = newstate(v->nfa);
+ NOERR();
+ t = parse(v, ')', LACON, s, s2);
+ freesubre(v, t); /* internal structure irrelevant */
+ assert(SEE(')') || ISERR());
+ NEXT();
+ n = newlacon(v, s, s2, pos);
+ NOERR();
+ ARCV(LACON, n);
+ return;
+ break;
+ /* then errors, to get them out of the way */
+ case '*':
+ case '+':
+ case '?':
+ case '{':
+ ERR(REG_BADRPT);
+ return;
+ break;
+ default:
+ ERR(REG_ASSERT);
+ return;
+ break;
+ /* then plain characters, and minor variants on that theme */
+ case ')': /* unbalanced paren */
+ if ((v->cflags&REG_ADVANCED) != REG_EXTENDED) {
+ ERR(REG_EPAREN);
+ return;
+ }
+ /* legal in EREs due to specification botch */
+ NOTE(REG_UPBOTCH);
+ /* fallthrough into case PLAIN */
+ case PLAIN:
+ onechr(v, v->nextvalue, lp, rp);
+ okcolors(v->nfa, v->cm);
+ NOERR();
+ NEXT();
+ break;
+ case '[':
+ if (v->nextvalue == 1)
+ bracket(v, lp, rp);
+ else
+ cbracket(v, lp, rp);
+ assert(SEE(']') || ISERR());
+ NEXT();
+ break;
+ case '.':
+ rainbow(v->nfa, v->cm, PLAIN,
+ (v->cflags&REG_NLSTOP) ? v->nlcolor : COLORLESS,
+ lp, rp);
+ NEXT();
+ break;
+ /* and finally the ugly stuff */
+ case '(': /* value flags as capturing or non */
+ cap = (type == LACON) ? 0 : v->nextvalue;
+ if (cap) {
+ v->nsubexp++;
+ subno = v->nsubexp;
+ if ((size_t)subno >= v->nsubs)
+ moresubs(v, subno);
+ assert((size_t)subno < v->nsubs);
+ } else
+ atomtype = PLAIN; /* something that's not '(' */
+ NEXT();
+ /* need new endpoints because tree will contain pointers */
+ s = newstate(v->nfa);
+ s2 = newstate(v->nfa);
+ NOERR();
+ EMPTYARC(lp, s);
+ EMPTYARC(s2, rp);
+ NOERR();
+ atom = parse(v, ')', PLAIN, s, s2);
+ assert(SEE(')') || ISERR());
+ NEXT();
+ NOERR();
+ if (cap) {
+ v->subs[subno] = atom;
+ t = subre(v, '(', atom->flags|CAP, lp, rp);
+ NOERR();
+ t->subno = subno;
+ t->left = atom;
+ atom = t;
+ }
+ /* postpone everything else pending possible {0} */
+ break;
+ case BACKREF: /* the Feature From The Black Lagoon */
+ INSIST(type != LACON, REG_ESUBREG);
+ INSIST(v->nextvalue < v->nsubs, REG_ESUBREG);
+ INSIST(v->subs[v->nextvalue] != NULL, REG_ESUBREG);
+ NOERR();
+ assert(v->nextvalue > 0);
+ atom = subre(v, 'b', BACKR, lp, rp);
+ subno = v->nextvalue;
+ atom->subno = subno;
+ EMPTYARC(lp, rp); /* temporarily, so there's something */
+ NEXT();
+ break;
+ }
+
+ /* ...and an atom may be followed by a quantifier */
+ switch (v->nexttype) {
+ case '*':
+ m = 0;
+ n = INFINITY;
+ qprefer = (v->nextvalue) ? LONGER : SHORTER;
+ NEXT();
+ break;
+ case '+':
+ m = 1;
+ n = INFINITY;
+ qprefer = (v->nextvalue) ? LONGER : SHORTER;
+ NEXT();
+ break;
+ case '?':
+ m = 0;
+ n = 1;
+ qprefer = (v->nextvalue) ? LONGER : SHORTER;
+ NEXT();
+ break;
+ case '{':
+ NEXT();
+ m = scannum(v);
+ if (EAT(',')) {
+ if (SEE(DIGIT))
+ n = scannum(v);
+ else
+ n = INFINITY;
+ if (m > n) {
+ ERR(REG_BADBR);
+ return;
+ }
+ /* {m,n} exercises preference, even if it's {m,m} */
+ qprefer = (v->nextvalue) ? LONGER : SHORTER;
+ } else {
+ n = m;
+ /* {m} passes operand's preference through */
+ qprefer = 0;
+ }
+ if (!SEE('}')) { /* catches errors too */
+ ERR(REG_BADBR);
+ return;
+ }
+ NEXT();
+ break;
+ default: /* no quantifier */
+ m = n = 1;
+ qprefer = 0;
+ break;
+ }
+
+ /* annoying special case: {0} or {0,0} cancels everything */
+ if (m == 0 && n == 0) {
+ if (atom != NULL)
+ freesubre(v, atom);
+ if (atomtype == '(')
+ v->subs[subno] = NULL;
+ delsub(v->nfa, lp, rp);
+ EMPTYARC(lp, rp);
+ return;
+ }
+
+ /* if not a messy case, avoid hard part */
+ assert(!MESSY(top->flags));
+ f = top->flags | qprefer | ((atom != NULL) ? atom->flags : 0);
+ if (atomtype != '(' && atomtype != BACKREF && !MESSY(UP(f))) {
+ if (!(m == 1 && n == 1))
+ repeat(v, lp, rp, m, n);
+ if (atom != NULL)
+ freesubre(v, atom);
+ top->flags = f;
+ return;
+ }
+
+ /*
+ * hard part: something messy
+ * That is, capturing parens, back reference, short/long clash, or
+ * an atom with substructure containing one of those.
+ */
+
+ /* now we'll need a subre for the contents even if they're boring */
+ if (atom == NULL) {
+ atom = subre(v, '=', 0, lp, rp);
+ NOERR();
+ }
+
+ /*
+ * prepare a general-purpose state skeleton
+ *
+ * ---> [s] ---prefix---> [begin] ---atom---> [end] ----rest---> [rp]
+ * / /
+ * [lp] ----> [s2] ----bypass---------------------
+ *
+ * where bypass is an empty, and prefix is some repetitions of atom
+ */
+ s = newstate(v->nfa); /* first, new endpoints for the atom */
+ s2 = newstate(v->nfa);
+ NOERR();
+ moveouts(v->nfa, lp, s);
+ moveins(v->nfa, rp, s2);
+ NOERR();
+ atom->begin = s;
+ atom->end = s2;
+ s = newstate(v->nfa); /* and spots for prefix and bypass */
+ s2 = newstate(v->nfa);
+ NOERR();
+ EMPTYARC(lp, s);
+ EMPTYARC(lp, s2);
+ NOERR();
+
+ /* break remaining subRE into x{...} and what follows */
+ t = subre(v, '.', COMBINE(qprefer, atom->flags), lp, rp);
+ t->left = atom;
+ atomp = &t->left;
+ /* here we should recurse... but we must postpone that to the end */
+
+ /* split top into prefix and remaining */
+ assert(top->op == '=' && top->left == NULL && top->right == NULL);
+ top->left = subre(v, '=', top->flags, top->begin, lp);
+ top->op = '.';
+ top->right = t;
+
+ /* if it's a backref, now is the time to replicate the subNFA */
+ if (atomtype == BACKREF) {
+ assert(atom->begin->nouts == 1); /* just the EMPTY */
+ delsub(v->nfa, atom->begin, atom->end);
+ assert(v->subs[subno] != NULL);
+ /* and here's why the recursion got postponed: it must */
+ /* wait until the skeleton is filled in, because it may */
+ /* hit a backref that wants to copy the filled-in skeleton */
+ dupnfa(v->nfa, v->subs[subno]->begin, v->subs[subno]->end,
+ atom->begin, atom->end);
+ NOERR();
+ }
+
+ /* it's quantifier time; first, turn x{0,...} into x{1,...}|empty */
+ if (m == 0) {
+ EMPTYARC(s2, atom->end); /* the bypass */
+ assert(PREF(qprefer) != 0);
+ f = COMBINE(qprefer, atom->flags);
+ t = subre(v, '|', f, lp, atom->end);
+ NOERR();
+ t->left = atom;
+ t->right = subre(v, '|', PREF(f), s2, atom->end);
+ NOERR();
+ t->right->left = subre(v, '=', 0, s2, atom->end);
+ NOERR();
+ *atomp = t;
+ atomp = &t->left;
+ m = 1;
+ }
+
+ /* deal with the rest of the quantifier */
+ if (atomtype == BACKREF) {
+ /* special case: backrefs have internal quantifiers */
+ EMPTYARC(s, atom->begin); /* empty prefix */
+ /* just stuff everything into atom */
+ repeat(v, atom->begin, atom->end, m, n);
+ atom->min = (short)m;
+ atom->max = (short)n;
+ atom->flags |= COMBINE(qprefer, atom->flags);
+ } else if (m == 1 && n == 1) {
+ /* no/vacuous quantifier: done */
+ EMPTYARC(s, atom->begin); /* empty prefix */
+ } else {
+ /* turn x{m,n} into x{m-1,n-1}x, with capturing */
+ /* parens in only second x */
+ dupnfa(v->nfa, atom->begin, atom->end, s, atom->begin);
+ assert(m >= 1 && m != INFINITY && n >= 1);
+ repeat(v, s, atom->begin, m-1, (n == INFINITY) ? n : n-1);
+ f = COMBINE(qprefer, atom->flags);
+ t = subre(v, '.', f, s, atom->end); /* prefix and atom */
+ NOERR();
+ t->left = subre(v, '=', PREF(f), s, atom->begin);
+ NOERR();
+ t->right = atom;
+ *atomp = t;
+ }
+
+ /* and finally, look after that postponed recursion */
+ t = top->right;
+ if (!(SEE('|') || SEE(stopper) || SEE(EOS)))
+ t->right = parsebranch(v, stopper, type, atom->end, rp, 1);
+ else {
+ EMPTYARC(atom->end, rp);
+ t->right = subre(v, '=', 0, atom->end, rp);
+ }
+ assert(SEE('|') || SEE(stopper) || SEE(EOS));
+ t->flags |= COMBINE(t->flags, t->right->flags);
+ top->flags |= COMBINE(top->flags, t->flags);
+}
+
+/*
+ - nonword - generate arcs for non-word-character ahead or behind
+ ^ static VOID nonword(struct vars *, int, struct state *, struct state *);
+ */
+static VOID
+nonword(v, dir, lp, rp)
+struct vars *v;
+int dir; /* AHEAD or BEHIND */
+struct state *lp;
+struct state *rp;
+{
+ int anchor = (dir == AHEAD) ? '$' : '^';
+
+ assert(dir == AHEAD || dir == BEHIND);
+ newarc(v->nfa, anchor, 1, lp, rp);
+ newarc(v->nfa, anchor, 0, lp, rp);
+ colorcomplement(v->nfa, v->cm, dir, v->wordchrs, lp, rp);
+ /* (no need for special attention to \n) */
+}
+
+/*
+ - word - generate arcs for word character ahead or behind
+ ^ static VOID word(struct vars *, int, struct state *, struct state *);
+ */
+static VOID
+word(v, dir, lp, rp)
+struct vars *v;
+int dir; /* AHEAD or BEHIND */
+struct state *lp;
+struct state *rp;
+{
+ assert(dir == AHEAD || dir == BEHIND);
+ cloneouts(v->nfa, v->wordchrs, lp, rp, dir);
+ /* (no need for special attention to \n) */
+}
+
+/*
+ - scannum - scan a number
+ ^ static int scannum(struct vars *);
+ */
+static int /* value, <= DUPMAX */
+scannum(v)
+struct vars *v;
+{
+ int n = 0;
+
+ while (SEE(DIGIT) && n < DUPMAX) {
+ n = n*10 + v->nextvalue;
+ NEXT();
+ }
+ if (SEE(DIGIT) || n > DUPMAX) {
+ ERR(REG_BADBR);
+ return 0;
+ }
+ return n;
+}
+
+/*
+ - repeat - replicate subNFA for quantifiers
+ * The duplication sequences used here are chosen carefully so that any
+ * pointers starting out pointing into the subexpression end up pointing into
+ * the last occurrence. (Note that it may not be strung between the same
+ * left and right end states, however!) This used to be important for the
+ * subRE tree, although the important bits are now handled by the in-line
+ * code in parse(), and when this is called, it doesn't matter any more.
+ ^ static VOID repeat(struct vars *, struct state *, struct state *, int, int);
+ */
+static VOID
+repeat(v, lp, rp, m, n)
+struct vars *v;
+struct state *lp;
+struct state *rp;
+int m;
+int n;
+{
+# define SOME 2
+# define INF 3
+# define PAIR(x, y) ((x)*4 + (y))
+# define REDUCE(x) ( ((x) == INFINITY) ? INF : (((x) > 1) ? SOME : (x)) )
+ CONST int rm = REDUCE(m);
+ CONST int rn = REDUCE(n);
+ struct state *s;
+ struct state *s2;
+
+ switch (PAIR(rm, rn)) {
+ case PAIR(0, 0): /* empty string */
+ delsub(v->nfa, lp, rp);
+ EMPTYARC(lp, rp);
+ break;
+ case PAIR(0, 1): /* do as x| */
+ EMPTYARC(lp, rp);
+ break;
+ case PAIR(0, SOME): /* do as x{1,n}| */
+ repeat(v, lp, rp, 1, n);
+ NOERR();
+ EMPTYARC(lp, rp);
+ break;
+ case PAIR(0, INF): /* loop x around */
+ s = newstate(v->nfa);
+ NOERR();
+ moveouts(v->nfa, lp, s);
+ moveins(v->nfa, rp, s);
+ EMPTYARC(lp, s);
+ EMPTYARC(s, rp);
+ break;
+ case PAIR(1, 1): /* no action required */
+ break;
+ case PAIR(1, SOME): /* do as x{0,n-1}x = (x{1,n-1}|)x */
+ s = newstate(v->nfa);
+ NOERR();
+ moveouts(v->nfa, lp, s);
+ dupnfa(v->nfa, s, rp, lp, s);
+ NOERR();
+ repeat(v, lp, s, 1, n-1);
+ NOERR();
+ EMPTYARC(lp, s);
+ break;
+ case PAIR(1, INF): /* add loopback arc */
+ s = newstate(v->nfa);
+ s2 = newstate(v->nfa);
+ NOERR();
+ moveouts(v->nfa, lp, s);
+ moveins(v->nfa, rp, s2);
+ EMPTYARC(lp, s);
+ EMPTYARC(s2, rp);
+ EMPTYARC(s2, s);
+ break;
+ case PAIR(SOME, SOME): /* do as x{m-1,n-1}x */
+ s = newstate(v->nfa);
+ NOERR();
+ moveouts(v->nfa, lp, s);
+ dupnfa(v->nfa, s, rp, lp, s);
+ NOERR();
+ repeat(v, lp, s, m-1, n-1);
+ break;
+ case PAIR(SOME, INF): /* do as x{m-1,}x */
+ s = newstate(v->nfa);
+ NOERR();
+ moveouts(v->nfa, lp, s);
+ dupnfa(v->nfa, s, rp, lp, s);
+ NOERR();
+ repeat(v, lp, s, m-1, n);
+ break;
+ default:
+ ERR(REG_ASSERT);
+ break;
+ }
+}
+
+/*
+ - bracket - handle non-complemented bracket expression
+ * Also called from cbracket for complemented bracket expressions.
+ ^ static VOID bracket(struct vars *, struct state *, struct state *);
+ */
+static VOID
+bracket(v, lp, rp)
+struct vars *v;
+struct state *lp;
+struct state *rp;
+{
+ assert(SEE('['));
+ NEXT();
+ while (!SEE(']') && !SEE(EOS))
+ brackpart(v, lp, rp);
+ assert(SEE(']') || ISERR());
+ okcolors(v->nfa, v->cm);
+}
+
+/*
+ - cbracket - handle complemented bracket expression
+ * We do it by calling bracket() with dummy endpoints, and then complementing
+ * the result. The alternative would be to invoke rainbow(), and then delete
+ * arcs as the b.e. is seen... but that gets messy.
+ ^ static VOID cbracket(struct vars *, struct state *, struct state *);
+ */
+static VOID
+cbracket(v, lp, rp)
+struct vars *v;
+struct state *lp;
+struct state *rp;
+{
+ struct state *left = newstate(v->nfa);
+ struct state *right = newstate(v->nfa);
+ struct state *s;
+ struct arc *a; /* arc from lp */
+ struct arc *ba; /* arc from left, from bracket() */
+ struct arc *pa; /* MCCE-prototype arc */
+ color co;
+ chr *p;
+ int i;
+
+ NOERR();
+ bracket(v, left, right);
+ if (v->cflags&REG_NLSTOP)
+ newarc(v->nfa, PLAIN, v->nlcolor, left, right);
+ NOERR();
+
+ assert(lp->nouts == 0); /* all outarcs will be ours */
+
+ /* easy part of complementing */
+ colorcomplement(v->nfa, v->cm, PLAIN, left, lp, rp);
+ NOERR();
+ if (v->mcces == NULL) { /* no MCCEs -- we're done */
+ dropstate(v->nfa, left);
+ assert(right->nins == 0);
+ freestate(v->nfa, right);
+ return;
+ }
+
+ /* but complementing gets messy in the presence of MCCEs... */
+ NOTE(REG_ULOCALE);
+ for (p = v->mcces->chrs, i = v->mcces->nchrs; i > 0; p++, i--) {
+ co = GETCOLOR(v->cm, *p);
+ a = findarc(lp, PLAIN, co);
+ ba = findarc(left, PLAIN, co);
+ if (ba == NULL) {
+ assert(a != NULL);
+ freearc(v->nfa, a);
+ } else {
+ assert(a == NULL);
+ }
+ s = newstate(v->nfa);
+ NOERR();
+ newarc(v->nfa, PLAIN, co, lp, s);
+ NOERR();
+ pa = findarc(v->mccepbegin, PLAIN, co);
+ assert(pa != NULL);
+ if (ba == NULL) { /* easy case, need all of them */
+ cloneouts(v->nfa, pa->to, s, rp, PLAIN);
+ newarc(v->nfa, '$', 1, s, rp);
+ newarc(v->nfa, '$', 0, s, rp);
+ colorcomplement(v->nfa, v->cm, AHEAD, pa->to, s, rp);
+ } else { /* must be selective */
+ if (findarc(ba->to, '$', 1) == NULL) {
+ newarc(v->nfa, '$', 1, s, rp);
+ newarc(v->nfa, '$', 0, s, rp);
+ colorcomplement(v->nfa, v->cm, AHEAD, pa->to,
+ s, rp);
+ }
+ for (pa = pa->to->outs; pa != NULL; pa = pa->outchain)
+ if (findarc(ba->to, PLAIN, pa->co) == NULL)
+ newarc(v->nfa, PLAIN, pa->co, s, rp);
+ if (s->nouts == 0) /* limit of selectivity: none */
+ dropstate(v->nfa, s); /* frees arc too */
+ }
+ NOERR();
+ }
+
+ delsub(v->nfa, left, right);
+ assert(left->nouts == 0);
+ freestate(v->nfa, left);
+ assert(right->nins == 0);
+ freestate(v->nfa, right);
+}
+
+/*
+ - brackpart - handle one item (or range) within a bracket expression
+ ^ static VOID brackpart(struct vars *, struct state *, struct state *);
+ */
+static VOID
+brackpart(v, lp, rp)
+struct vars *v;
+struct state *lp;
+struct state *rp;
+{
+ celt startc;
+ celt endc;
+ struct cvec *cv;
+ chr *startp;
+ chr *endp;
+ chr c[1];
+
+ /* parse something, get rid of special cases, take shortcuts */
+ switch (v->nexttype) {
+ case RANGE: /* a-b-c or other botch */
+ ERR(REG_ERANGE);
+ return;
+ break;
+ case PLAIN:
+ c[0] = v->nextvalue;
+ NEXT();
+ /* shortcut for ordinary chr (not range, not MCCE leader) */
+ if (!SEE(RANGE) && !ISCELEADER(v, c[0])) {
+ onechr(v, c[0], lp, rp);
+ return;
+ }
+ startc = element(v, c, c+1);
+ NOERR();
+ break;
+ case COLLEL:
+ startp = v->now;
+ endp = scanplain(v);
+ INSIST(startp < endp, REG_ECOLLATE);
+ NOERR();
+ startc = element(v, startp, endp);
+ NOERR();
+ break;
+ case ECLASS:
+ startp = v->now;
+ endp = scanplain(v);
+ INSIST(startp < endp, REG_ECOLLATE);
+ NOERR();
+ startc = element(v, startp, endp);
+ NOERR();
+ cv = eclass(v, startc, (v->cflags&REG_ICASE));
+ NOERR();
+ dovec(v, cv, lp, rp);
+ return;
+ break;
+ case CCLASS:
+ startp = v->now;
+ endp = scanplain(v);
+ INSIST(startp < endp, REG_ECTYPE);
+ NOERR();
+ cv = cclass(v, startp, endp, (v->cflags&REG_ICASE));
+ NOERR();
+ dovec(v, cv, lp, rp);
+ return;
+ break;
+ default:
+ ERR(REG_ASSERT);
+ return;
+ break;
+ }
+
+ if (SEE(RANGE)) {
+ NEXT();
+ switch (v->nexttype) {
+ case PLAIN:
+ case RANGE:
+ c[0] = v->nextvalue;
+ NEXT();
+ endc = element(v, c, c+1);
+ NOERR();
+ break;
+ case COLLEL:
+ startp = v->now;
+ endp = scanplain(v);
+ INSIST(startp < endp, REG_ECOLLATE);
+ NOERR();
+ endc = element(v, startp, endp);
+ NOERR();
+ break;
+ default:
+ ERR(REG_ERANGE);
+ return;
+ break;
+ }
+ } else
+ endc = startc;
+
+ /*
+ * Ranges are unportable. Actually, standard C does
+ * guarantee that digits are contiguous, but making
+ * that an exception is just too complicated.
+ */
+ if (startc != endc)
+ NOTE(REG_UUNPORT);
+ cv = range(v, startc, endc, (v->cflags&REG_ICASE));
+ NOERR();
+ dovec(v, cv, lp, rp);
+}
+
+/*
+ - scanplain - scan PLAIN contents of [. etc.
+ * Certain bits of trickery in lex.c know that this code does not try
+ * to look past the final bracket of the [. etc.
+ ^ static chr *scanplain(struct vars *);
+ */
+static chr * /* just after end of sequence */
+scanplain(v)
+struct vars *v;
+{
+ chr *endp;
+
+ assert(SEE(COLLEL) || SEE(ECLASS) || SEE(CCLASS));
+ NEXT();
+
+ endp = v->now;
+ while (SEE(PLAIN)) {
+ endp = v->now;
+ NEXT();
+ }
+
+ assert(SEE(END) || ISERR());
+ NEXT();
+
+ return endp;
+}
+
+/*
+ - leaders - process a cvec of collating elements to also include leaders
+ * Also gives all characters involved their own colors, which is almost
+ * certainly necessary, and sets up little disconnected subNFA.
+ ^ static VOID leaders(struct vars *, struct cvec *);
+ */
+static VOID
+leaders(v, cv)
+struct vars *v;
+struct cvec *cv;
+{
+ int mcce;
+ chr *p;
+ chr leader;
+ struct state *s;
+ struct arc *a;
+
+ v->mccepbegin = newstate(v->nfa);
+ v->mccepend = newstate(v->nfa);
+ NOERR();
+
+ for (mcce = 0; mcce < cv->nmcces; mcce++) {
+ p = cv->mcces[mcce];
+ leader = *p;
+ if (!haschr(cv, leader)) {
+ addchr(cv, leader);
+ s = newstate(v->nfa);
+ newarc(v->nfa, PLAIN, subcolor(v->cm, leader),
+ v->mccepbegin, s);
+ okcolors(v->nfa, v->cm);
+ } else {
+ a = findarc(v->mccepbegin, PLAIN,
+ GETCOLOR(v->cm, leader));
+ assert(a != NULL);
+ s = a->to;
+ assert(s != v->mccepend);
+ }
+ p++;
+ assert(*p != 0 && *(p+1) == 0); /* only 2-char MCCEs for now */
+ newarc(v->nfa, PLAIN, subcolor(v->cm, *p), s, v->mccepend);
+ okcolors(v->nfa, v->cm);
+ }
+}
+
+/*
+ - onechr - fill in arcs for a plain character, and possible case complements
+ * This is mostly a shortcut for efficient handling of the common case.
+ ^ static VOID onechr(struct vars *, pchr, struct state *, struct state *);
+ */
+static VOID
+onechr(v, c, lp, rp)
+struct vars *v;
+pchr c;
+struct state *lp;
+struct state *rp;
+{
+ if (!(v->cflags&REG_ICASE)) {
+ newarc(v->nfa, PLAIN, subcolor(v->cm, c), lp, rp);
+ return;
+ }
+
+ /* rats, need general case anyway... */
+ dovec(v, allcases(v, c), lp, rp);
+}
+
+/*
+ - dovec - fill in arcs for each element of a cvec
+ * This one has to handle the messy cases, like MCCEs and MCCE leaders.
+ ^ static VOID dovec(struct vars *, struct cvec *, struct state *,
+ ^ struct state *);
+ */
+static VOID
+dovec(v, cv, lp, rp)
+struct vars *v;
+struct cvec *cv;
+struct state *lp;
+struct state *rp;
+{
+ chr ch, from, to;
+ celt ce;
+ chr *p;
+ int i;
+ color co;
+ struct cvec *leads;
+ struct arc *a;
+ struct arc *pa; /* arc in prototype */
+ struct state *s;
+ struct state *ps; /* state in prototype */
+
+ /* need a place to store leaders, if any */
+ if (nmcces(v) > 0) {
+ assert(v->mcces != NULL);
+ if (v->cv2 == NULL || v->cv2->nchrs < v->mcces->nchrs) {
+ if (v->cv2 != NULL)
+ free(v->cv2);
+ v->cv2 = newcvec(v->mcces->nchrs, 0, v->mcces->nmcces);
+ NOERR();
+ leads = v->cv2;
+ } else
+ leads = clearcvec(v->cv2);
+ } else
+ leads = NULL;
+
+ /* first, get the ordinary characters out of the way */
+ for (p = cv->chrs, i = cv->nchrs; i > 0; p++, i--) {
+ ch = *p;
+ if (!ISCELEADER(v, ch))
+ newarc(v->nfa, PLAIN, subcolor(v->cm, ch), lp, rp);
+ else {
+ assert(singleton(v->cm, ch));
+ assert(leads != NULL);
+ if (!haschr(leads, ch))
+ addchr(leads, ch);
+ }
+ }
+
+ /* and the ranges */
+ for (p = cv->ranges, i = cv->nranges; i > 0; p += 2, i--) {
+ from = *p;
+ to = *(p+1);
+ while (from <= to && (ce = nextleader(v, from, to)) != NOCELT) {
+ if (from < ce)
+ subrange(v, from, ce - 1, lp, rp);
+ assert(singleton(v->cm, ce));
+ assert(leads != NULL);
+ if (!haschr(leads, ce))
+ addchr(leads, ce);
+ from = ce + 1;
+ }
+ if (from <= to)
+ subrange(v, from, to, lp, rp);
+ }
+
+ if ((leads == NULL || leads->nchrs == 0) && cv->nmcces == 0)
+ return;
+
+ /* deal with the MCCE leaders */
+ NOTE(REG_ULOCALE);
+ for (p = leads->chrs, i = leads->nchrs; i > 0; p++, i--) {
+ co = GETCOLOR(v->cm, *p);
+ a = findarc(lp, PLAIN, co);
+ if (a != NULL)
+ s = a->to;
+ else {
+ s = newstate(v->nfa);
+ NOERR();
+ newarc(v->nfa, PLAIN, co, lp, s);
+ NOERR();
+ }
+ pa = findarc(v->mccepbegin, PLAIN, co);
+ assert(pa != NULL);
+ ps = pa->to;
+ newarc(v->nfa, '$', 1, s, rp);
+ newarc(v->nfa, '$', 0, s, rp);
+ colorcomplement(v->nfa, v->cm, AHEAD, ps, s, rp);
+ NOERR();
+ }
+
+ /* and the MCCEs */
+ for (i = 0; i < cv->nmcces; i++) {
+ p = cv->mcces[i];
+ assert(singleton(v->cm, *p));
+ ch = *p++;
+ co = GETCOLOR(v->cm, ch);
+ a = findarc(lp, PLAIN, co);
+ if (a != NULL)
+ s = a->to;
+ else {
+ s = newstate(v->nfa);
+ NOERR();
+ newarc(v->nfa, PLAIN, co, lp, s);
+ NOERR();
+ }
+ assert(*p != 0); /* at least two chars */
+ assert(singleton(v->cm, *p));
+ ch = *p++;
+ co = GETCOLOR(v->cm, ch);
+ assert(*p == 0); /* and only two, for now */
+ newarc(v->nfa, PLAIN, co, s, rp);
+ NOERR();
+ }
+}
+
+/*
+ - nextleader - find next MCCE leader within range
+ ^ static celt nextleader(struct vars *, pchr, pchr);
+ */
+static celt /* NOCELT means none */
+nextleader(v, from, to)
+struct vars *v;
+pchr from;
+pchr to;
+{
+ int i;
+ chr *p;
+ chr ch;
+ celt it = NOCELT;
+
+ if (v->mcces == NULL)
+ return it;
+
+ for (i = v->mcces->nchrs, p = v->mcces->chrs; i > 0; i--, p++) {
+ ch = *p;
+ if (from <= ch && ch <= to)
+ if (it == NOCELT || ch < it)
+ it = ch;
+ }
+ return it;
+}
+
+/*
+ - wordchrs - set up word-chr list for word-boundary stuff, if needed
+ * The list is kept as a bunch of arcs between two dummy states; it's
+ * disposed of by the unreachable-states sweep in NFA optimization.
+ * Does NEXT(). Must not be called from any unusual lexical context.
+ * This should be reconciled with the \w etc. handling in lex.c, and
+ * should be cleaned up to reduce dependencies on input scanning.
+ ^ static VOID wordchrs(struct vars *);
+ */
+static VOID
+wordchrs(v)
+struct vars *v;
+{
+ struct state *left;
+ struct state *right;
+
+ if (v->wordchrs != NULL) {
+ NEXT(); /* for consistency */
+ return;
+ }
+
+ left = newstate(v->nfa);
+ right = newstate(v->nfa);
+ NOERR();
+ /* fine point: implemented with [::], and lexer will set REG_ULOCALE */
+ lexword(v);
+ NEXT();
+ assert(v->savenow != NULL && SEE('['));
+ bracket(v, left, right);
+ assert((v->savenow != NULL && SEE(']')) || ISERR());
+ NEXT();
+ NOERR();
+ v->wordchrs = left;
+}
+
+/*
+ - subre - allocate a subre
+ ^ static struct subre *subre(struct vars *, int, int, struct state *,
+ ^ struct state *);
+ */
+static struct subre *
+subre(v, op, flags, begin, end)
+struct vars *v;
+int op;
+int flags;
+struct state *begin;
+struct state *end;
+{
+ struct subre *ret;
+
+ ret = v->treefree;
+ if (ret != NULL)
+ v->treefree = ret->left;
+ else {
+ ret = (struct subre *)MALLOC(sizeof(struct subre));
+ if (ret == NULL) {
+ ERR(REG_ESPACE);
+ return NULL;
+ }
+ ret->chain = v->treechain;
+ v->treechain = ret;
+ }
+
+ assert(strchr("|.b(=", op) != NULL);
+
+ ret->op = op;
+ ret->flags = flags;
+ ret->retry = 0;
+ ret->subno = 0;
+ ret->min = ret->max = 1;
+ ret->left = NULL;
+ ret->right = NULL;
+ ret->begin = begin;
+ ret->end = end;
+ ZAPCNFA(ret->cnfa);
+
+ return ret;
+}
+
+/*
+ - freesubre - free a subRE subtree
+ ^ static VOID freesubre(struct vars *, struct subre *);
+ */
+static VOID
+freesubre(v, sr)
+struct vars *v; /* might be NULL */
+struct subre *sr;
+{
+ if (sr == NULL)
+ return;
+
+ if (sr->left != NULL)
+ freesubre(v, sr->left);
+ if (sr->right != NULL)
+ freesubre(v, sr->right);
+
+ freesrnode(v, sr);
+}
+
+/*
+ - freesrnode - free one node in a subRE subtree
+ ^ static VOID freesrnode(struct vars *, struct subre *);
+ */
+static VOID
+freesrnode(v, sr)
+struct vars *v; /* might be NULL */
+struct subre *sr;
+{
+ if (sr == NULL)
+ return;
+
+ if (!NULLCNFA(sr->cnfa))
+ freecnfa(&sr->cnfa);
+ sr->flags = 0;
+
+ if (v != NULL) {
+ sr->left = v->treefree;
+ v->treefree = sr;
+ } else
+ FREE(sr);
+}
+
+/*
+ - optst - optimize a subRE subtree
+ ^ static VOID optst(struct vars *, struct subre *);
+ */
+static VOID
+optst(v, t)
+struct vars *v;
+struct subre *t;
+{
+ if (t == NULL)
+ return;
+
+ /* preference cleanup and analysis */
+ if (t->flags&SHORTER)
+ v->usedshorter = 1;
+
+ /* recurse through children */
+ if (t->left != NULL)
+ optst(v, t->left);
+ if (t->right != NULL)
+ optst(v, t->right);
+}
+
+/*
+ - numst - number tree nodes (assigning retry indexes)
+ ^ static int numst(struct subre *, int);
+ */
+static int /* next number */
+numst(t, start)
+struct subre *t;
+int start; /* starting point for subtree numbers */
+{
+ int i;
+
+ assert(t != NULL);
+
+ i = start;
+ t->retry = (short)i++;
+ if (t->left != NULL)
+ i = numst(t->left, i);
+ if (t->right != NULL)
+ i = numst(t->right, i);
+ return i;
+}
+
+/*
+ - markst - mark tree nodes as INUSE
+ ^ static VOID markst(struct subre *);
+ */
+static VOID
+markst(t)
+struct subre *t;
+{
+ assert(t != NULL);
+
+ t->flags |= INUSE;
+ if (t->left != NULL)
+ markst(t->left);
+ if (t->right != NULL)
+ markst(t->right);
+}
+
+/*
+ - cleanst - free any tree nodes not marked INUSE
+ ^ static VOID cleanst(struct vars *);
+ */
+static VOID
+cleanst(v)
+struct vars *v;
+{
+ struct subre *t;
+ struct subre *next;
+
+ for (t = v->treechain; t != NULL; t = next) {
+ next = t->chain;
+ if (!(t->flags&INUSE))
+ FREE(t);
+ }
+ v->treechain = NULL;
+ v->treefree = NULL; /* just on general principles */
+}
+
+/*
+ - nfatree - turn a subRE subtree into a tree of compacted NFAs
+ ^ static int nfatree(struct vars *, struct subre *, FILE *);
+ */
+static int /* optimize results from top node */
+nfatree(v, t, f)
+struct vars *v;
+struct subre *t;
+FILE *f; /* for debug output */
+{
+ assert(t != NULL && t->begin != NULL);
+
+ if (t->left != NULL)
+ (DISCARD)nfatree(v, t->left, f);
+ if (t->right != NULL)
+ (DISCARD)nfatree(v, t->right, f);
+
+ return nfanode(v, t, f);
+}
+
+/*
+ - nfanode - do one NFA for nfatree
+ ^ static int nfanode(struct vars *, struct subre *, FILE *);
+ */
+static int /* optimize results */
+nfanode(v, t, f)
+struct vars *v;
+struct subre *t;
+FILE *f; /* for debug output */
+{
+ struct nfa *nfa;
+ int ret = 0;
+
+ assert(t->begin != NULL);
+
+ nfa = newnfa(v, v->cm, v->nfa);
+ NOERRZ();
+ dupnfa(nfa, t->begin, t->end, nfa->init, nfa->final);
+ if (!ISERR()) {
+ specialcolors(nfa);
+ ret = optimize(nfa, f);
+ }
+ if (!ISERR())
+ compact(nfa, &t->cnfa);
+
+ freenfa(nfa);
+ return ret;
+}
+
+/*
+ - newlacon - allocate a lookahead-constraint subRE
+ ^ static int newlacon(struct vars *, struct state *, struct state *, int);
+ */
+static int /* lacon number */
+newlacon(v, begin, end, pos)
+struct vars *v;
+struct state *begin;
+struct state *end;
+int pos;
+{
+ int n;
+ struct subre *sub;
+
+ if (v->nlacons == 0) {
+ v->lacons = (struct subre *)MALLOC(2 * sizeof(struct subre));
+ n = 1; /* skip 0th */
+ v->nlacons = 2;
+ } else {
+ v->lacons = (struct subre *)REALLOC(v->lacons,
+ (v->nlacons+1)*sizeof(struct subre));
+ n = v->nlacons++;
+ }
+ if (v->lacons == NULL) {
+ ERR(REG_ESPACE);
+ return 0;
+ }
+ sub = &v->lacons[n];
+ sub->begin = begin;
+ sub->end = end;
+ sub->subno = pos;
+ ZAPCNFA(sub->cnfa);
+ return n;
+}
+
+/*
+ - freelacons - free lookahead-constraint subRE vector
+ ^ static VOID freelacons(struct subre *, int);
+ */
+static VOID
+freelacons(subs, n)
+struct subre *subs;
+int n;
+{
+ struct subre *sub;
+ int i;
+
+ assert(n > 0);
+ for (sub = subs + 1, i = n - 1; i > 0; sub++, i--) /* no 0th */
+ if (!NULLCNFA(sub->cnfa))
+ freecnfa(&sub->cnfa);
+ FREE(subs);
+}
+
+/*
+ - rfree - free a whole RE (insides of regfree)
+ ^ static VOID rfree(regex_t *);
+ */
+static VOID
+rfree(re)
+regex_t *re;
+{
+ struct guts *g;
+
+ if (re == NULL || re->re_magic != REMAGIC)
+ return;
+
+ re->re_magic = 0; /* invalidate RE */
+ g = (struct guts *)re->re_guts;
+ re->re_guts = NULL;
+ re->re_fns = NULL;
+ g->magic = 0;
+ freecm(&g->cmap);
+ if (g->tree != NULL)
+ freesubre((struct vars *)NULL, g->tree);
+ if (g->lacons != NULL)
+ freelacons(g->lacons, g->nlacons);
+ if (!NULLCNFA(g->search))
+ freecnfa(&g->search);
+ FREE(g);
+}
+
+/*
+ - dump - dump an RE in human-readable form
+ ^ static VOID dump(regex_t *, FILE *);
+ */
+static VOID
+dump(re, f)
+regex_t *re;
+FILE *f;
+{
+#ifdef REG_DEBUG
+ struct guts *g;
+ int i;
+
+ if (re->re_magic != REMAGIC)
+ fprintf(f, "bad magic number (0x%x not 0x%x)\n", re->re_magic,
+ REMAGIC);
+ if (re->re_guts == NULL) {
+ fprintf(f, "NULL guts!!!\n");
+ return;
+ }
+ g = (struct guts *)re->re_guts;
+ if (g->magic != GUTSMAGIC)
+ fprintf(f, "bad guts magic number (0x%x not 0x%x)\n", g->magic,
+ GUTSMAGIC);
+
+ fprintf(f, "nsub %d, info 0%o, csize %d, ntree %d, usedshort %d\n",
+ re->re_nsub, re->re_info, re->re_csize, g->ntree,
+ g->usedshorter);
+
+ dumpcolors(&g->cmap, f);
+ if (!NULLCNFA(g->search)) {
+ printf("search:\n");
+ dumpcnfa(&g->search, f);
+ }
+ for (i = 1; i < g->nlacons; i++) {
+ fprintf(f, "la%d (%s):\n", i,
+ (g->lacons[i].subno) ? "positive" : "negative");
+ dumpcnfa(&g->lacons[i].cnfa, f);
+ }
+ dumpst(g->tree, f, 0);
+#endif
+}
+
+/*
+ - dumpst - dump a subRE tree
+ ^ static VOID dumpst(struct subre *, FILE *, int);
+ */
+static VOID
+dumpst(t, f, nfapresent)
+struct subre *t;
+FILE *f;
+int nfapresent; /* is the original NFA still around? */
+{
+ if (t == NULL)
+ fprintf(f, "null tree\n");
+ else
+ stdump(t, f, nfapresent, 0);
+ fflush(f);
+}
+
+/*
+ - stdump - recursive guts of dumpst
+ ^ static VOID stdump(struct subre *, FILE *, int, int);
+ */
+static VOID
+stdump(t, f, nfapresent, level)
+struct subre *t;
+FILE *f;
+int nfapresent; /* is the original NFA still around? */
+int level;
+{
+ int i;
+# define RTSEP " "
+
+ for (i = 0; i < level; i++)
+ fprintf(f, RTSEP);
+ fprintf(f, "%c (", t->op);
+ if (t->flags&LONGER)
+ fprintf(f, "L");
+ if (t->flags&SHORTER)
+ fprintf(f, "S");
+ if (t->flags&MIXED)
+ fprintf(f, "M");
+ if (t->flags&CAP)
+ fprintf(f, "c");
+ if (t->flags&BACKR)
+ fprintf(f, "b");
+ if (!(t->flags&INUSE))
+ fprintf(f, "!u");
+ fprintf(f, ") r%d", t->retry);
+ if (t->subno != 0)
+ fprintf(f, " #%d", t->subno);
+ if (t->min != 1 || t->max != 1) {
+ fprintf(f, "{%d,", t->min);
+ if (t->max != INFINITY)
+ fprintf(f, "%d", t->max);
+ fprintf(f, "}");
+ }
+ if (nfapresent)
+ fprintf(f, " %ld-%ld", (long)t->begin->no, (long)t->end->no);
+ if (!NULLCNFA(t->cnfa))
+ fprintf(f, ":");
+ fprintf(f, "\n");
+ if (t->left != NULL)
+ stdump(t->left, f, nfapresent, level+1);
+ if (!NULLCNFA(t->cnfa))
+ dumpcnfa(&t->cnfa, f);
+ if (t->right != NULL)
+ stdump(t->right, f, nfapresent, level+1);
+}
+
+#include "regc_lex.c"
+#include "regc_color.c"
+#include "regc_nfa.c"
+#include "regc_cvec.c"
+#include "regc_locale.c"