+/* =====^!^===== 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 makesearch _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 long nfatree _ANSI_ARGS_((struct vars *, struct subre *, FILE *));
+static long 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));
+static char *stid _ANSI_ARGS_((struct subre *, char *, size_t));
+/* === 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));
+#ifdef REG_DEBUG
+static chr *ch _ANSI_ARGS_((NOPARMS));
+#endif
+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 *));
+static int singleton _ANSI_ARGS_((struct colormap *, pchr c));
+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 *newstate _ANSI_ARGS_((struct nfa *));
+static struct state *newfstate _ANSI_ARGS_((struct nfa *, int flag));
+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 long 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 long 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));
+static VOID addmcce _ANSI_ARGS_((struct cvec *, chr *, chr *));
+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 */
+};
+
+/* 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 */