--- /dev/null
+/*
+ * lexical analyzer
+ * This file is #included by regcomp.c.
+ *
+ * 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.
+ *
+ * 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
+ * HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $Header$
+ *
+ */
+
+/* scanning macros (know about v) */
+#define ATEOS() (v->now >= v->stop)
+#define HAVE(n) (v->stop - v->now >= (n))
+#define NEXT1(c) (!ATEOS() && *v->now == CHR(c))
+#define NEXT2(a,b) (HAVE(2) && *v->now == CHR(a) && *(v->now+1) == CHR(b))
+#define NEXT3(a,b,c) (HAVE(3) && *v->now == CHR(a) && \
+ *(v->now+1) == CHR(b) && \
+ *(v->now+2) == CHR(c))
+#define SET(c) (v->nexttype = (c))
+#define SETV(c, n) (v->nexttype = (c), v->nextvalue = (n))
+#define RET(c) return (SET(c), 1)
+#define RETV(c, n) return (SETV(c, n), 1)
+#define FAILW(e) return (ERR(e), 0) /* ERR does SET(EOS) */
+#define LASTTYPE(t) (v->lasttype == (t))
+
+/* lexical contexts */
+#define L_ERE 1 /* mainline ERE/ARE */
+#define L_BRE 2 /* mainline BRE */
+#define L_Q 3 /* REG_QUOTE */
+#define L_EBND 4 /* ERE/ARE bound */
+#define L_BBND 5 /* BRE bound */
+#define L_BRACK 6 /* brackets */
+#define L_CEL 7 /* collating element */
+#define L_ECL 8 /* equivalence class */
+#define L_CCL 9 /* character class */
+#define INTOCON(c) (v->lexcon = (c))
+#define INCON(con) (v->lexcon == (con))
+
+/* construct pointer past end of chr array */
+#define ENDOF(array) ((array) + sizeof(array)/sizeof(chr))
+
+/*
+ * lexstart - set up lexical stuff, scan leading options
+ */
+static void
+lexstart(struct vars * v)
+{
+ prefixes(v); /* may turn on new type bits etc. */
+ NOERR();
+
+ if (v->cflags & REG_QUOTE)
+ {
+ assert(!(v->cflags & (REG_ADVANCED | REG_EXPANDED | REG_NEWLINE)));
+ INTOCON(L_Q);
+ }
+ else if (v->cflags & REG_EXTENDED)
+ {
+ assert(!(v->cflags & REG_QUOTE));
+ INTOCON(L_ERE);
+ }
+ else
+ {
+ assert(!(v->cflags & (REG_QUOTE | REG_ADVF)));
+ INTOCON(L_BRE);
+ }
+
+ v->nexttype = EMPTY; /* remember we were at the start */
+ next(v); /* set up the first token */
+}
+
+/*
+ * prefixes - implement various special prefixes
+ */
+static void
+prefixes(struct vars * v)
+{
+ /* literal string doesn't get any of this stuff */
+ if (v->cflags & REG_QUOTE)
+ return;
+
+ /* initial "***" gets special things */
+ if (HAVE(4) && NEXT3('*', '*', '*'))
+ switch (*(v->now + 3))
+ {
+ case CHR('?'): /* "***?" error, msg shows version */
+ ERR(REG_BADPAT);
+ return; /* proceed no further */
+ break;
+ case CHR('='): /* "***=" shifts to literal string */
+ NOTE(REG_UNONPOSIX);
+ v->cflags |= REG_QUOTE;
+ v->cflags &= ~(REG_ADVANCED | REG_EXPANDED | REG_NEWLINE);
+ v->now += 4;
+ return; /* and there can be no more prefixes */
+ break;
+ case CHR(':'): /* "***:" shifts to AREs */
+ NOTE(REG_UNONPOSIX);
+ v->cflags |= REG_ADVANCED;
+ v->now += 4;
+ break;
+ default: /* otherwise *** is just an error */
+ ERR(REG_BADRPT);
+ return;
+ break;
+ }
+
+ /* BREs and EREs don't get embedded options */
+ if ((v->cflags & REG_ADVANCED) != REG_ADVANCED)
+ return;
+
+ /* embedded options (AREs only) */
+ if (HAVE(3) && NEXT2('(', '?') && iscalpha(*(v->now + 2)))
+ {
+ NOTE(REG_UNONPOSIX);
+ v->now += 2;
+ for (; !ATEOS() && iscalpha(*v->now); v->now++)
+ switch (*v->now)
+ {
+ case CHR('b'): /* BREs (but why???) */
+ v->cflags &= ~(REG_ADVANCED | REG_QUOTE);
+ break;
+ case CHR('c'): /* case sensitive */
+ v->cflags &= ~REG_ICASE;
+ break;
+ case CHR('e'): /* plain EREs */
+ v->cflags |= REG_EXTENDED;
+ v->cflags &= ~(REG_ADVF | REG_QUOTE);
+ break;
+ case CHR('i'): /* case insensitive */
+ v->cflags |= REG_ICASE;
+ break;
+ case CHR('m'): /* Perloid synonym for n */
+ case CHR('n'): /* \n affects ^ $ . [^ */
+ v->cflags |= REG_NEWLINE;
+ break;
+ case CHR('p'): /* ~Perl, \n affects . [^ */
+ v->cflags |= REG_NLSTOP;
+ v->cflags &= ~REG_NLANCH;
+ break;
+ case CHR('q'): /* literal string */
+ v->cflags |= REG_QUOTE;
+ v->cflags &= ~REG_ADVANCED;
+ break;
+ case CHR('s'): /* single line, \n ordinary */
+ v->cflags &= ~REG_NEWLINE;
+ break;
+ case CHR('t'): /* tight syntax */
+ v->cflags &= ~REG_EXPANDED;
+ break;
+ case CHR('w'): /* weird, \n affects ^ $ only */
+ v->cflags &= ~REG_NLSTOP;
+ v->cflags |= REG_NLANCH;
+ break;
+ case CHR('x'): /* expanded syntax */
+ v->cflags |= REG_EXPANDED;
+ break;
+ default:
+ ERR(REG_BADOPT);
+ return;
+ }
+ if (!NEXT1(')'))
+ {
+ ERR(REG_BADOPT);
+ return;
+ }
+ v->now++;
+ if (v->cflags & REG_QUOTE)
+ v->cflags &= ~(REG_EXPANDED | REG_NEWLINE);
+ }
+}
+
+/*
+ * lexnest - "call a subroutine", interpolating string at the lexical level
+ *
+ * Note, this is not a very general facility. There are a number of
+ * implicit assumptions about what sorts of strings can be subroutines.
+ */
+static void
+lexnest(struct vars * v,
+ chr *beginp, /* start of interpolation */
+ chr *endp) /* one past end of interpolation */
+{
+ assert(v->savenow == NULL); /* only one level of nesting */
+ v->savenow = v->now;
+ v->savestop = v->stop;
+ v->now = beginp;
+ v->stop = endp;
+}
+
+/*
+ * string constants to interpolate as expansions of things like \d
+ */
+static chr backd[] = { /* \d */
+ CHR('['), CHR('['), CHR(':'),
+ CHR('d'), CHR('i'), CHR('g'), CHR('i'), CHR('t'),
+ CHR(':'), CHR(']'), CHR(']')
+};
+static chr backD[] = { /* \D */
+ CHR('['), CHR('^'), CHR('['), CHR(':'),
+ CHR('d'), CHR('i'), CHR('g'), CHR('i'), CHR('t'),
+ CHR(':'), CHR(']'), CHR(']')
+};
+static chr brbackd[] = { /* \d within brackets */
+ CHR('['), CHR(':'),
+ CHR('d'), CHR('i'), CHR('g'), CHR('i'), CHR('t'),
+ CHR(':'), CHR(']')
+};
+static chr backs[] = { /* \s */
+ CHR('['), CHR('['), CHR(':'),
+ CHR('s'), CHR('p'), CHR('a'), CHR('c'), CHR('e'),
+ CHR(':'), CHR(']'), CHR(']')
+};
+static chr backS[] = { /* \S */
+ CHR('['), CHR('^'), CHR('['), CHR(':'),
+ CHR('s'), CHR('p'), CHR('a'), CHR('c'), CHR('e'),
+ CHR(':'), CHR(']'), CHR(']')
+};
+static chr brbacks[] = { /* \s within brackets */
+ CHR('['), CHR(':'),
+ CHR('s'), CHR('p'), CHR('a'), CHR('c'), CHR('e'),
+ CHR(':'), CHR(']')
+};
+static chr backw[] = { /* \w */
+ CHR('['), CHR('['), CHR(':'),
+ CHR('a'), CHR('l'), CHR('n'), CHR('u'), CHR('m'),
+ CHR(':'), CHR(']'), CHR('_'), CHR(']')
+};
+static chr backW[] = { /* \W */
+ CHR('['), CHR('^'), CHR('['), CHR(':'),
+ CHR('a'), CHR('l'), CHR('n'), CHR('u'), CHR('m'),
+ CHR(':'), CHR(']'), CHR('_'), CHR(']')
+};
+static chr brbackw[] = { /* \w within brackets */
+ CHR('['), CHR(':'),
+ CHR('a'), CHR('l'), CHR('n'), CHR('u'), CHR('m'),
+ CHR(':'), CHR(']'), CHR('_')
+};
+
+/*
+ * lexword - interpolate a bracket expression for word characters
+ * Possibly ought to inquire whether there is a "word" character class.
+ */
+static void
+lexword(struct vars * v)
+{
+ lexnest(v, backw, ENDOF(backw));
+}
+
+/*
+ * next - get next token
+ */
+static int /* 1 normal, 0 failure */
+next(struct vars * v)
+{
+ chr c;
+
+ /* errors yield an infinite sequence of failures */
+ if (ISERR())
+ return 0; /* the error has set nexttype to EOS */
+
+ /* remember flavor of last token */
+ v->lasttype = v->nexttype;
+
+ /* REG_BOSONLY */
+ if (v->nexttype == EMPTY && (v->cflags & REG_BOSONLY))
+ {
+ /* at start of a REG_BOSONLY RE */
+ RETV(SBEGIN, 0); /* same as \A */
+ }
+
+ /* if we're nested and we've hit end, return to outer level */
+ if (v->savenow != NULL && ATEOS())
+ {
+ v->now = v->savenow;
+ v->stop = v->savestop;
+ v->savenow = v->savestop = NULL;
+ }
+
+ /* skip white space etc. if appropriate (not in literal or []) */
+ if (v->cflags & REG_EXPANDED)
+ switch (v->lexcon)
+ {
+ case L_ERE:
+ case L_BRE:
+ case L_EBND:
+ case L_BBND:
+ skip(v);
+ break;
+ }
+
+ /* handle EOS, depending on context */
+ if (ATEOS())
+ {
+ switch (v->lexcon)
+ {
+ case L_ERE:
+ case L_BRE:
+ case L_Q:
+ RET(EOS);
+ break;
+ case L_EBND:
+ case L_BBND:
+ FAILW(REG_EBRACE);
+ break;
+ case L_BRACK:
+ case L_CEL:
+ case L_ECL:
+ case L_CCL:
+ FAILW(REG_EBRACK);
+ break;
+ }
+ assert(NOTREACHED);
+ }
+
+ /* okay, time to actually get a character */
+ c = *v->now++;
+
+ /* deal with the easy contexts, punt EREs to code below */
+ switch (v->lexcon)
+ {
+ case L_BRE: /* punt BREs to separate function */
+ return brenext(v, c);
+ break;
+ case L_ERE: /* see below */
+ break;
+ case L_Q: /* literal strings are easy */
+ RETV(PLAIN, c);
+ break;
+ case L_BBND: /* bounds are fairly simple */
+ case L_EBND:
+ switch (c)
+ {
+ case CHR('0'):
+ case CHR('1'):
+ case CHR('2'):
+ case CHR('3'):
+ case CHR('4'):
+ case CHR('5'):
+ case CHR('6'):
+ case CHR('7'):
+ case CHR('8'):
+ case CHR('9'):
+ RETV(DIGIT, (chr) DIGITVAL(c));
+ break;
+ case CHR(','):
+ RET(',');
+ break;
+ case CHR('}'): /* ERE bound ends with } */
+ if (INCON(L_EBND))
+ {
+ INTOCON(L_ERE);
+ if ((v->cflags & REG_ADVF) && NEXT1('?'))
+ {
+ v->now++;
+ NOTE(REG_UNONPOSIX);
+ RETV('}', 0);
+ }
+ RETV('}', 1);
+ }
+ else
+ FAILW(REG_BADBR);
+ break;
+ case CHR('\\'): /* BRE bound ends with \} */
+ if (INCON(L_BBND) && NEXT1('}'))
+ {
+ v->now++;
+ INTOCON(L_BRE);
+ RET('}');
+ }
+ else
+ FAILW(REG_BADBR);
+ break;
+ default:
+ FAILW(REG_BADBR);
+ break;
+ }
+ assert(NOTREACHED);
+ break;
+ case L_BRACK: /* brackets are not too hard */
+ switch (c)
+ {
+ case CHR(']'):
+ if (LASTTYPE('['))
+ RETV(PLAIN, c);
+ else
+ {
+ INTOCON((v->cflags & REG_EXTENDED) ?
+ L_ERE : L_BRE);
+ RET(']');
+ }
+ break;
+ case CHR('\\'):
+ NOTE(REG_UBBS);
+ if (!(v->cflags & REG_ADVF))
+ RETV(PLAIN, c);
+ NOTE(REG_UNONPOSIX);
+ if (ATEOS())
+ FAILW(REG_EESCAPE);
+ (DISCARD) lexescape(v);
+ switch (v->nexttype)
+ { /* not all escapes okay here */
+ case PLAIN:
+ return 1;
+ break;
+ case CCLASS:
+ switch (v->nextvalue)
+ {
+ case 'd':
+ lexnest(v, brbackd, ENDOF(brbackd));
+ break;
+ case 's':
+ lexnest(v, brbacks, ENDOF(brbacks));
+ break;
+ case 'w':
+ lexnest(v, brbackw, ENDOF(brbackw));
+ break;
+ default:
+ FAILW(REG_EESCAPE);
+ break;
+ }
+ /* lexnest done, back up and try again */
+ v->nexttype = v->lasttype;
+ return next(v);
+ break;
+ }
+ /* not one of the acceptable escapes */
+ FAILW(REG_EESCAPE);
+ break;
+ case CHR('-'):
+ if (LASTTYPE('[') || NEXT1(']'))
+ RETV(PLAIN, c);
+ else
+ RETV(RANGE, c);
+ break;
+ case CHR('['):
+ if (ATEOS())
+ FAILW(REG_EBRACK);
+ switch (*v->now++)
+ {
+ case CHR('.'):
+ INTOCON(L_CEL);
+ /* might or might not be locale-specific */
+ RET(COLLEL);
+ break;
+ case CHR('='):
+ INTOCON(L_ECL);
+ NOTE(REG_ULOCALE);
+ RET(ECLASS);
+ break;
+ case CHR(':'):
+ INTOCON(L_CCL);
+ NOTE(REG_ULOCALE);
+ RET(CCLASS);
+ break;
+ default: /* oops */
+ v->now--;
+ RETV(PLAIN, c);
+ break;
+ }
+ assert(NOTREACHED);
+ break;
+ default:
+ RETV(PLAIN, c);
+ break;
+ }
+ assert(NOTREACHED);
+ break;
+ case L_CEL: /* collating elements are easy */
+ if (c == CHR('.') && NEXT1(']'))
+ {
+ v->now++;
+ INTOCON(L_BRACK);
+ RETV(END, '.');
+ }
+ else
+ RETV(PLAIN, c);
+ break;
+ case L_ECL: /* ditto equivalence classes */
+ if (c == CHR('=') && NEXT1(']'))
+ {
+ v->now++;
+ INTOCON(L_BRACK);
+ RETV(END, '=');
+ }
+ else
+ RETV(PLAIN, c);
+ break;
+ case L_CCL: /* ditto character classes */
+ if (c == CHR(':') && NEXT1(']'))
+ {
+ v->now++;
+ INTOCON(L_BRACK);
+ RETV(END, ':');
+ }
+ else
+ RETV(PLAIN, c);
+ break;
+ default:
+ assert(NOTREACHED);
+ break;
+ }
+
+ /* that got rid of everything except EREs and AREs */
+ assert(INCON(L_ERE));
+
+ /* deal with EREs and AREs, except for backslashes */
+ switch (c)
+ {
+ case CHR('|'):
+ RET('|');
+ break;
+ case CHR('*'):
+ if ((v->cflags & REG_ADVF) && NEXT1('?'))
+ {
+ v->now++;
+ NOTE(REG_UNONPOSIX);
+ RETV('*', 0);
+ }
+ RETV('*', 1);
+ break;
+ case CHR('+'):
+ if ((v->cflags & REG_ADVF) && NEXT1('?'))
+ {
+ v->now++;
+ NOTE(REG_UNONPOSIX);
+ RETV('+', 0);
+ }
+ RETV('+', 1);
+ break;
+ case CHR('?'):
+ if ((v->cflags & REG_ADVF) && NEXT1('?'))
+ {
+ v->now++;
+ NOTE(REG_UNONPOSIX);
+ RETV('?', 0);
+ }
+ RETV('?', 1);
+ break;
+ case CHR('{'): /* bounds start or plain character */
+ if (v->cflags & REG_EXPANDED)
+ skip(v);
+ if (ATEOS() || !iscdigit(*v->now))
+ {
+ NOTE(REG_UBRACES);
+ NOTE(REG_UUNSPEC);
+ RETV(PLAIN, c);
+ }
+ else
+ {
+ NOTE(REG_UBOUNDS);
+ INTOCON(L_EBND);
+ RET('{');
+ }
+ assert(NOTREACHED);
+ break;
+ case CHR('('): /* parenthesis, or advanced extension */
+ if ((v->cflags & REG_ADVF) && NEXT1('?'))
+ {
+ NOTE(REG_UNONPOSIX);
+ v->now++;
+ switch (*v->now++)
+ {
+ case CHR(':'): /* non-capturing paren */
+ RETV('(', 0);
+ break;
+ case CHR('#'): /* comment */
+ while (!ATEOS() && *v->now != CHR(')'))
+ v->now++;
+ if (!ATEOS())
+ v->now++;
+ assert(v->nexttype == v->lasttype);
+ return next(v);
+ break;
+ case CHR('='): /* positive lookahead */
+ NOTE(REG_ULOOKAHEAD);
+ RETV(LACON, 1);
+ break;
+ case CHR('!'): /* negative lookahead */
+ NOTE(REG_ULOOKAHEAD);
+ RETV(LACON, 0);
+ break;
+ default:
+ FAILW(REG_BADRPT);
+ break;
+ }
+ assert(NOTREACHED);
+ }
+ if (v->cflags & REG_NOSUB)
+ RETV('(', 0); /* all parens non-capturing */
+ else
+ RETV('(', 1);
+ break;
+ case CHR(')'):
+ if (LASTTYPE('('))
+ NOTE(REG_UUNSPEC);
+ RETV(')', c);
+ break;
+ case CHR('['): /* easy except for [[:<:]] and [[:>:]] */
+ if (HAVE(6) && *(v->now + 0) == CHR('[') &&
+ *(v->now + 1) == CHR(':') &&
+ (*(v->now + 2) == CHR('<') ||
+ *(v->now + 2) == CHR('>')) &&
+ *(v->now + 3) == CHR(':') &&
+ *(v->now + 4) == CHR(']') &&
+ *(v->now + 5) == CHR(']'))
+ {
+ c = *(v->now + 2);
+ v->now += 6;
+ NOTE(REG_UNONPOSIX);
+ RET((c == CHR('<')) ? '<' : '>');
+ }
+ INTOCON(L_BRACK);
+ if (NEXT1('^'))
+ {
+ v->now++;
+ RETV('[', 0);
+ }
+ RETV('[', 1);
+ break;
+ case CHR('.'):
+ RET('.');
+ break;
+ case CHR('^'):
+ RET('^');
+ break;
+ case CHR('$'):
+ RET('$');
+ break;
+ case CHR('\\'): /* mostly punt backslashes to code below */
+ if (ATEOS())
+ FAILW(REG_EESCAPE);
+ break;
+ default: /* ordinary character */
+ RETV(PLAIN, c);
+ break;
+ }
+
+ /* ERE/ARE backslash handling; backslash already eaten */
+ assert(!ATEOS());
+ if (!(v->cflags & REG_ADVF))
+ { /* only AREs have non-trivial escapes */
+ if (iscalnum(*v->now))
+ {
+ NOTE(REG_UBSALNUM);
+ NOTE(REG_UUNSPEC);
+ }
+ RETV(PLAIN, *v->now++);
+ }
+ (DISCARD) lexescape(v);
+ if (ISERR())
+ FAILW(REG_EESCAPE);
+ if (v->nexttype == CCLASS)
+ { /* fudge at lexical level */
+ switch (v->nextvalue)
+ {
+ case 'd':
+ lexnest(v, backd, ENDOF(backd));
+ break;
+ case 'D':
+ lexnest(v, backD, ENDOF(backD));
+ break;
+ case 's':
+ lexnest(v, backs, ENDOF(backs));
+ break;
+ case 'S':
+ lexnest(v, backS, ENDOF(backS));
+ break;
+ case 'w':
+ lexnest(v, backw, ENDOF(backw));
+ break;
+ case 'W':
+ lexnest(v, backW, ENDOF(backW));
+ break;
+ default:
+ assert(NOTREACHED);
+ FAILW(REG_ASSERT);
+ break;
+ }
+ /* lexnest done, back up and try again */
+ v->nexttype = v->lasttype;
+ return next(v);
+ }
+ /* otherwise, lexescape has already done the work */
+ return !ISERR();
+}
+
+/*
+ * lexescape - parse an ARE backslash escape (backslash already eaten)
+ * Note slightly nonstandard use of the CCLASS type code.
+ */
+static int /* not actually used, but convenient for
+ * RETV */
+lexescape(struct vars * v)
+{
+ chr c;
+ static chr alert[] = {
+ CHR('a'), CHR('l'), CHR('e'), CHR('r'), CHR('t')
+ };
+ static chr esc[] = {
+ CHR('E'), CHR('S'), CHR('C')
+ };
+ chr *save;
+
+ assert(v->cflags & REG_ADVF);
+
+ assert(!ATEOS());
+ c = *v->now++;
+ if (!iscalnum(c))
+ RETV(PLAIN, c);
+
+ NOTE(REG_UNONPOSIX);
+ switch (c)
+ {
+ case CHR('a'):
+ RETV(PLAIN, chrnamed(v, alert, ENDOF(alert), CHR('\007')));
+ break;
+ case CHR('A'):
+ RETV(SBEGIN, 0);
+ break;
+ case CHR('b'):
+ RETV(PLAIN, CHR('\b'));
+ break;
+ case CHR('B'):
+ RETV(PLAIN, CHR('\\'));
+ break;
+ case CHR('c'):
+ NOTE(REG_UUNPORT);
+ if (ATEOS())
+ FAILW(REG_EESCAPE);
+ RETV(PLAIN, (chr) (*v->now++ & 037));
+ break;
+ case CHR('d'):
+ NOTE(REG_ULOCALE);
+ RETV(CCLASS, 'd');
+ break;
+ case CHR('D'):
+ NOTE(REG_ULOCALE);
+ RETV(CCLASS, 'D');
+ break;
+ case CHR('e'):
+ NOTE(REG_UUNPORT);
+ RETV(PLAIN, chrnamed(v, esc, ENDOF(esc), CHR('\033')));
+ break;
+ case CHR('f'):
+ RETV(PLAIN, CHR('\f'));
+ break;
+ case CHR('m'):
+ RET('<');
+ break;
+ case CHR('M'):
+ RET('>');
+ break;
+ case CHR('n'):
+ RETV(PLAIN, CHR('\n'));
+ break;
+ case CHR('r'):
+ RETV(PLAIN, CHR('\r'));
+ break;
+ case CHR('s'):
+ NOTE(REG_ULOCALE);
+ RETV(CCLASS, 's');
+ break;
+ case CHR('S'):
+ NOTE(REG_ULOCALE);
+ RETV(CCLASS, 'S');
+ break;
+ case CHR('t'):
+ RETV(PLAIN, CHR('\t'));
+ break;
+ case CHR('u'):
+ c = lexdigits(v, 16, 4, 4);
+ if (ISERR())
+ FAILW(REG_EESCAPE);
+ RETV(PLAIN, c);
+ break;
+ case CHR('U'):
+ c = lexdigits(v, 16, 8, 8);
+ if (ISERR())
+ FAILW(REG_EESCAPE);
+ RETV(PLAIN, c);
+ break;
+ case CHR('v'):
+ RETV(PLAIN, CHR('\v'));
+ break;
+ case CHR('w'):
+ NOTE(REG_ULOCALE);
+ RETV(CCLASS, 'w');
+ break;
+ case CHR('W'):
+ NOTE(REG_ULOCALE);
+ RETV(CCLASS, 'W');
+ break;
+ case CHR('x'):
+ NOTE(REG_UUNPORT);
+ c = lexdigits(v, 16, 1, 255); /* REs >255 long outside
+ * spec */
+ if (ISERR())
+ FAILW(REG_EESCAPE);
+ RETV(PLAIN, c);
+ break;
+ case CHR('y'):
+ NOTE(REG_ULOCALE);
+ RETV(WBDRY, 0);
+ break;
+ case CHR('Y'):
+ NOTE(REG_ULOCALE);
+ RETV(NWBDRY, 0);
+ break;
+ case CHR('Z'):
+ RETV(SEND, 0);
+ break;
+ case CHR('1'):
+ case CHR('2'):
+ case CHR('3'):
+ case CHR('4'):
+ case CHR('5'):
+ case CHR('6'):
+ case CHR('7'):
+ case CHR('8'):
+ case CHR('9'):
+ save = v->now;
+ v->now--; /* put first digit back */
+ c = lexdigits(v, 10, 1, 255); /* REs >255 long outside
+ * spec */
+ if (ISERR())
+ FAILW(REG_EESCAPE);
+ /* ugly heuristic (first test is "exactly 1 digit?") */
+ if (v->now - save == 0 || (int) c <= v->nsubexp)
+ {
+ NOTE(REG_UBACKREF);
+ RETV(BACKREF, (chr) c);
+ }
+ /* oops, doesn't look like it's a backref after all... */
+ v->now = save;
+ /* and fall through into octal number */
+ case CHR('0'):
+ NOTE(REG_UUNPORT);
+ v->now--; /* put first digit back */
+ c = lexdigits(v, 8, 1, 3);
+ if (ISERR())
+ FAILW(REG_EESCAPE);
+ RETV(PLAIN, c);
+ break;
+ default:
+ assert(iscalpha(c));
+ FAILW(REG_EESCAPE); /* unknown alphabetic escape */
+ break;
+ }
+ assert(NOTREACHED);
+}
+
+/*
+ * lexdigits - slurp up digits and return chr value
+ */
+static chr /* chr value; errors signalled via ERR */
+lexdigits(struct vars * v,
+ int base,
+ int minlen,
+ int maxlen)
+{
+ uchr n; /* unsigned to avoid overflow misbehavior */
+ int len;
+ chr c;
+ int d;
+ const uchr ub = (uchr) base;
+
+ n = 0;
+ for (len = 0; len < maxlen && !ATEOS(); len++)
+ {
+ c = *v->now++;
+ switch (c)
+ {
+ case CHR('0'):
+ case CHR('1'):
+ case CHR('2'):
+ case CHR('3'):
+ case CHR('4'):
+ case CHR('5'):
+ case CHR('6'):
+ case CHR('7'):
+ case CHR('8'):
+ case CHR('9'):
+ d = DIGITVAL(c);
+ break;
+ case CHR('a'):
+ case CHR('A'):
+ d = 10;
+ break;
+ case CHR('b'):
+ case CHR('B'):
+ d = 11;
+ break;
+ case CHR('c'):
+ case CHR('C'):
+ d = 12;
+ break;
+ case CHR('d'):
+ case CHR('D'):
+ d = 13;
+ break;
+ case CHR('e'):
+ case CHR('E'):
+ d = 14;
+ break;
+ case CHR('f'):
+ case CHR('F'):
+ d = 15;
+ break;
+ default:
+ v->now--; /* oops, not a digit at all */
+ d = -1;
+ break;
+ }
+
+ if (d >= base)
+ { /* not a plausible digit */
+ v->now--;
+ d = -1;
+ }
+ if (d < 0)
+ break; /* NOTE BREAK OUT */
+ n = n * ub + (uchr) d;
+ }
+ if (len < minlen)
+ ERR(REG_EESCAPE);
+
+ return (chr) n;
+}
+
+/*
+ * brenext - get next BRE token
+ *
+ * This is much like EREs except for all the stupid backslashes and the
+ * context-dependency of some things.
+ */
+static int /* 1 normal, 0 failure */
+brenext(struct vars * v,
+ chr pc)
+{
+ chr c = (chr) pc;
+
+ switch (c)
+ {
+ case CHR('*'):
+ if (LASTTYPE(EMPTY) || LASTTYPE('(') || LASTTYPE('^'))
+ RETV(PLAIN, c);
+ RET('*');
+ break;
+ case CHR('['):
+ if (HAVE(6) && *(v->now + 0) == CHR('[') &&
+ *(v->now + 1) == CHR(':') &&
+ (*(v->now + 2) == CHR('<') ||
+ *(v->now + 2) == CHR('>')) &&
+ *(v->now + 3) == CHR(':') &&
+ *(v->now + 4) == CHR(']') &&
+ *(v->now + 5) == CHR(']'))
+ {
+ c = *(v->now + 2);
+ v->now += 6;
+ NOTE(REG_UNONPOSIX);
+ RET((c == CHR('<')) ? '<' : '>');
+ }
+ INTOCON(L_BRACK);
+ if (NEXT1('^'))
+ {
+ v->now++;
+ RETV('[', 0);
+ }
+ RETV('[', 1);
+ break;
+ case CHR('.'):
+ RET('.');
+ break;
+ case CHR('^'):
+ if (LASTTYPE(EMPTY))
+ RET('^');
+ if (LASTTYPE('('))
+ {
+ NOTE(REG_UUNSPEC);
+ RET('^');
+ }
+ RETV(PLAIN, c);
+ break;
+ case CHR('$'):
+ if (v->cflags & REG_EXPANDED)
+ skip(v);
+ if (ATEOS())
+ RET('$');
+ if (NEXT2('\\', ')'))
+ {
+ NOTE(REG_UUNSPEC);
+ RET('$');
+ }
+ RETV(PLAIN, c);
+ break;
+ case CHR('\\'):
+ break; /* see below */
+ default:
+ RETV(PLAIN, c);
+ break;
+ }
+
+ assert(c == CHR('\\'));
+
+ if (ATEOS())
+ FAILW(REG_EESCAPE);
+
+ c = *v->now++;
+ switch (c)
+ {
+ case CHR('{'):
+ INTOCON(L_BBND);
+ NOTE(REG_UBOUNDS);
+ RET('{');
+ break;
+ case CHR('('):
+ RETV('(', 1);
+ break;
+ case CHR(')'):
+ RETV(')', c);
+ break;
+ case CHR('<'):
+ NOTE(REG_UNONPOSIX);
+ RET('<');
+ break;
+ case CHR('>'):
+ NOTE(REG_UNONPOSIX);
+ RET('>');
+ break;
+ case CHR('1'):
+ case CHR('2'):
+ case CHR('3'):
+ case CHR('4'):
+ case CHR('5'):
+ case CHR('6'):
+ case CHR('7'):
+ case CHR('8'):
+ case CHR('9'):
+ NOTE(REG_UBACKREF);
+ RETV(BACKREF, (chr) DIGITVAL(c));
+ break;
+ default:
+ if (iscalnum(c))
+ {
+ NOTE(REG_UBSALNUM);
+ NOTE(REG_UUNSPEC);
+ }
+ RETV(PLAIN, c);
+ break;
+ }
+
+ assert(NOTREACHED);
+}
+
+/*
+ * skip - skip white space and comments in expanded form
+ */
+static void
+skip(struct vars * v)
+{
+ chr *start = v->now;
+
+ assert(v->cflags & REG_EXPANDED);
+
+ for (;;)
+ {
+ while (!ATEOS() && iscspace(*v->now))
+ v->now++;
+ if (ATEOS() || *v->now != CHR('#'))
+ break; /* NOTE BREAK OUT */
+ assert(NEXT1('#'));
+ while (!ATEOS() && *v->now != CHR('\n'))
+ v->now++;
+ /* leave the newline to be picked up by the iscspace loop */
+ }
+
+ if (v->now != start)
+ NOTE(REG_UNONPOSIX);
+}
+
+/*
+ * newline - return the chr for a newline
+ *
+ * This helps confine use of CHR to this source file.
+ */
+static chr
+newline(void)
+{
+ return CHR('\n');
+}
+
+/*
+ * chrnamed - return the chr known by a given (chr string) name
+ *
+ * The code is a bit clumsy, but this routine gets only such specialized
+ * use that it hardly matters.
+ */
+static chr
+chrnamed(struct vars * v,
+ chr *startp, /* start of name */
+ chr *endp, /* just past end of name */
+ chr lastresort) /* what to return if name lookup fails */
+{
+ celt c;
+ int errsave;
+ int e;
+ struct cvec *cv;
+
+ errsave = v->err;
+ v->err = 0;
+ c = element(v, startp, endp);
+ e = v->err;
+ v->err = errsave;
+
+ if (e != 0)
+ return (chr) lastresort;
+
+ cv = range(v, c, c, 0);
+ if (cv->nchrs == 0)
+ return (chr) lastresort;
+ return cv->chrs[0];
+}
--- /dev/null
+/*
+ * Internal interface definitions, etc., for the reg package
+ *
+ * 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.
+ *
+ * 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
+ * HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $Id$
+ */
+
+
+
+/*
+ * Environmental customization. It should not (I hope) be necessary to
+ * alter the file you are now reading -- regcustom.h should handle it all,
+ * given care here and elsewhere.
+ */
+#include "regcustom.h"
+
+
+
+/*
+ * Things that regcustom.h might override.
+ */
+
+/* assertions */
+#ifndef assert
+#ifndef REG_DEBUG
+# ifndef NDEBUG
+# define NDEBUG /* no assertions */
+# endif
+#endif
+#include <assert.h>
+#endif
+
+/* voids */
+#ifndef DISCARD
+#define DISCARD void /* for throwing values away */
+#endif
+#ifndef VS
+#define VS(x) ((void *)(x)) /* cast something to generic ptr */
+#endif
+
+/* function-pointer declarator */
+#ifndef FUNCPTR
+#define FUNCPTR(name, args) (*name) args
+#endif
+
+/* memory allocation */
+#ifndef MALLOC
+#define MALLOC(n) malloc(n)
+#endif
+#ifndef REALLOC
+#define REALLOC(p, n) realloc(VS(p), n)
+#endif
+#ifndef FREE
+#define FREE(p) free(VS(p))
+#endif
+
+/* want size of a char in bits, and max value in bounded quantifiers */
+#ifndef CHAR_BIT
+#include <limits.h>
+#endif
+#ifndef _POSIX2_RE_DUP_MAX
+#define _POSIX2_RE_DUP_MAX 255 /* normally from <limits.h> */
+#endif
+
+
+
+/*
+ * misc
+ */
+
+#define NOTREACHED 0
+#define xxx 1
+
+#define DUPMAX _POSIX2_RE_DUP_MAX
+#define INFINITY (DUPMAX+1)
+
+#define REMAGIC 0xfed7 /* magic number for main struct */
+
+
+
+/*
+ * debugging facilities
+ */
+#ifdef REG_DEBUG
+/* FDEBUG does finite-state tracing */
+#define FDEBUG(arglist) { if (v->eflags®_FTRACE) printf arglist; }
+/* MDEBUG does higher-level tracing */
+#define MDEBUG(arglist) { if (v->eflags®_MTRACE) printf arglist; }
+#else
+#define FDEBUG(arglist) {}
+#define MDEBUG(arglist) {}
+#endif
+
+
+
+/*
+ * bitmap manipulation
+ */
+#define UBITS (CHAR_BIT * sizeof(unsigned))
+#define BSET(uv, sn) ((uv)[(sn)/UBITS] |= (unsigned)1 << ((sn)%UBITS))
+#define ISBSET(uv, sn) ((uv)[(sn)/UBITS] & ((unsigned)1 << ((sn)%UBITS)))
+
+
+
+/*
+ * We dissect a chr into byts for colormap table indexing. Here we define
+ * a byt, which will be the same as a byte on most machines... The exact
+ * size of a byt is not critical, but about 8 bits is good, and extraction
+ * of 8-bit chunks is sometimes especially fast.
+ */
+#ifndef BYTBITS
+#define BYTBITS 8 /* bits in a byt */
+#endif
+#define BYTTAB (1<<BYTBITS) /* size of table with one entry per byt
+ * value */
+#define BYTMASK (BYTTAB-1) /* bit mask for byt */
+#define NBYTS ((CHRBITS+BYTBITS-1)/BYTBITS)
+/* the definition of GETCOLOR(), below, assumes NBYTS <= 4 */
+
+
+
+/*
+ * As soon as possible, we map chrs into equivalence classes -- "colors" --
+ * which are of much more manageable number.
+ */
+typedef short color; /* colors of characters */
+typedef int pcolor; /* what color promotes to */
+
+#define COLORLESS (-1) /* impossible color */
+#define WHITE 0 /* default color, parent of all others */
+
+
+
+/*
+ * A colormap is a tree -- more precisely, a DAG -- indexed at each level
+ * by a byt of the chr, to map the chr to a color efficiently. Because
+ * lower sections of the tree can be shared, it can exploit the usual
+ * sparseness of such a mapping table. The tree is always NBYTS levels
+ * deep (in the past it was shallower during construction but was "filled"
+ * to full depth at the end of that); areas that are unaltered as yet point
+ * to "fill blocks" which are entirely WHITE in color.
+ */
+
+/* the tree itself */
+struct colors
+{
+ color ccolor[BYTTAB];
+};
+struct ptrs
+{
+ union tree *pptr[BYTTAB];
+};
+union tree
+{
+ struct colors colors;
+ struct ptrs ptrs;
+};
+
+#define tcolor colors.ccolor
+#define tptr ptrs.pptr
+
+/* internal per-color structure for the color machinery */
+struct colordesc
+{
+ uchr nchrs; /* number of chars of this color */
+ color sub; /* open subcolor (if any); free chain ptr */
+#define NOSUB COLORLESS
+ struct arc *arcs; /* color chain */
+ int flags;
+#define FREECOL 01 /* currently free */
+#define PSEUDO 02 /* pseudocolor, no real chars */
+#define UNUSEDCOLOR(cd) ((cd)->flags&FREECOL)
+ union tree *block; /* block of solid color, if any */
+};
+
+/* the color map itself */
+struct colormap
+{
+ int magic;
+#define CMMAGIC 0x876
+ struct vars *v; /* for compile error reporting */
+ size_t ncds; /* number of colordescs */
+ size_t max; /* highest in use */
+ color free; /* beginning of free chain (if non-0) */
+ struct colordesc *cd;
+#define CDEND(cm) (&(cm)->cd[(cm)->max + 1])
+#define NINLINECDS ((size_t)10)
+ struct colordesc cdspace[NINLINECDS];
+ union tree tree[NBYTS]; /* tree top, plus fill blocks */
+};
+
+/* optimization magic to do fast chr->color mapping */
+#define B0(c) ((c) & BYTMASK)
+#define B1(c) (((c)>>BYTBITS) & BYTMASK)
+#define B2(c) (((c)>>(2*BYTBITS)) & BYTMASK)
+#define B3(c) (((c)>>(3*BYTBITS)) & BYTMASK)
+#if NBYTS == 1
+#define GETCOLOR(cm, c) ((cm)->tree->tcolor[B0(c)])
+#endif
+/* beware, for NBYTS>1, GETCOLOR() is unsafe -- 2nd arg used repeatedly */
+#if NBYTS == 2
+#define GETCOLOR(cm, c) ((cm)->tree->tptr[B1(c)]->tcolor[B0(c)])
+#endif
+#if NBYTS == 4
+#define GETCOLOR(cm, c) ((cm)->tree->tptr[B3(c)]->tptr[B2(c)]->tptr[B1(c)]->tcolor[B0(c)])
+#endif
+
+
+
+/*
+ * Interface definitions for locale-interface functions in locale.c.
+ * Multi-character collating elements (MCCEs) cause most of the trouble.
+ */
+struct cvec
+{
+ int nchrs; /* number of chrs */
+ int chrspace; /* number of chrs possible */
+ chr *chrs; /* pointer to vector of chrs */
+ int nranges; /* number of ranges (chr pairs) */
+ int rangespace; /* number of chrs possible */
+ chr *ranges; /* pointer to vector of chr pairs */
+ int nmcces; /* number of MCCEs */
+ int mccespace; /* number of MCCEs possible */
+ int nmccechrs; /* number of chrs used for MCCEs */
+ chr *mcces[1]; /* pointers to 0-terminated MCCEs */
+ /* and both batches of chrs are on the end */
+};
+
+/* caution: this value cannot be changed easily */
+#define MAXMCCE 2 /* length of longest MCCE */
+
+
+
+/*
+ * definitions for NFA internal representation
+ *
+ * Having a "from" pointer within each arc may seem redundant, but it
+ * saves a lot of hassle.
+ */
+struct state;
+
+struct arc
+{
+ int type;
+#define ARCFREE '\0'
+ color co;
+ struct state *from; /* where it's from (and contained within) */
+ struct state *to; /* where it's to */
+ struct arc *outchain; /* *from's outs chain or free chain */
+#define freechain outchain
+ struct arc *inchain; /* *to's ins chain */
+ struct arc *colorchain; /* color's arc chain */
+};
+
+struct arcbatch
+{ /* for bulk allocation of arcs */
+ struct arcbatch *next;
+#define ABSIZE 10
+ struct arc a[ABSIZE];
+};
+
+struct state
+{
+ int no;
+#define FREESTATE (-1)
+ char flag; /* marks special states */
+ int nins; /* number of inarcs */
+ struct arc *ins; /* chain of inarcs */
+ int nouts; /* number of outarcs */
+ struct arc *outs; /* chain of outarcs */
+ struct arc *free; /* chain of free arcs */
+ struct state *tmp; /* temporary for traversal algorithms */
+ struct state *next; /* chain for traversing all */
+ struct state *prev; /* back chain */
+ struct arcbatch oas; /* first arcbatch, avoid malloc in easy
+ * case */
+ int noas; /* number of arcs used in first arcbatch */
+};
+
+struct nfa
+{
+ struct state *pre; /* pre-initial state */
+ struct state *init; /* initial state */
+ struct state *final; /* final state */
+ struct state *post; /* post-final state */
+ int nstates; /* for numbering states */
+ struct state *states; /* state-chain header */
+ struct state *slast; /* tail of the chain */
+ struct state *free; /* free list */
+ struct colormap *cm; /* the color map */
+ color bos[2]; /* colors, if any, assigned to BOS and BOL */
+ color eos[2]; /* colors, if any, assigned to EOS and EOL */
+ struct vars *v; /* simplifies compile error reporting */
+ struct nfa *parent; /* parent NFA, if any */
+};
+
+
+
+/*
+ * definitions for compacted NFA
+ */
+struct carc
+{
+ color co; /* COLORLESS is list terminator */
+ int to; /* state number */
+};
+
+struct cnfa
+{
+ int nstates; /* number of states */
+ int ncolors; /* number of colors */
+ int flags;
+#define HASLACONS 01 /* uses lookahead constraints */
+ int pre; /* setup state number */
+ int post; /* teardown state number */
+ color bos[2]; /* colors, if any, assigned to BOS and BOL */
+ color eos[2]; /* colors, if any, assigned to EOS and EOL */
+ struct carc **states; /* vector of pointers to outarc lists */
+ struct carc *arcs; /* the area for the lists */
+};
+
+#define ZAPCNFA(cnfa) ((cnfa).nstates = 0)
+#define NULLCNFA(cnfa) ((cnfa).nstates == 0)
+
+
+
+/*
+ * subexpression tree
+ */
+struct subre
+{
+ char op; /* '|', '.' (concat), 'b' (backref), '(',
+ * '=' */
+ char flags;
+#define LONGER 01 /* prefers longer match */
+#define SHORTER 02 /* prefers shorter match */
+#define MIXED 04 /* mixed preference below */
+#define CAP 010 /* capturing parens below */
+#define BACKR 020 /* back reference below */
+#define INUSE 0100 /* in use in final tree */
+#define LOCAL 03 /* bits which may not propagate up */
+#define LMIX(f) ((f)<<2) /* LONGER -> MIXED */
+#define SMIX(f) ((f)<<1) /* SHORTER -> MIXED */
+#define UP(f) (((f)&~LOCAL) | (LMIX(f) & SMIX(f) & MIXED))
+#define MESSY(f) ((f)&(MIXED|CAP|BACKR))
+#define PREF(f) ((f)&LOCAL)
+#define PREF2(f1, f2) ((PREF(f1) != 0) ? PREF(f1) : PREF(f2))
+#define COMBINE(f1, f2) (UP((f1)|(f2)) | PREF2(f1, f2))
+ short retry; /* index into retry memory */
+ int subno; /* subexpression number (for 'b' and '(') */
+ short min; /* min repetitions, for backref only */
+ short max; /* max repetitions, for backref only */
+ struct subre *left; /* left child, if any (also freelist
+ * chain) */
+ struct subre *right; /* right child, if any */
+ struct state *begin; /* outarcs from here... */
+ struct state *end; /* ...ending in inarcs here */
+ struct cnfa cnfa; /* compacted NFA, if any */
+ struct subre *chain; /* for bookkeeping and error cleanup */
+};
+
+
+
+/*
+ * table of function pointers for generic manipulation functions
+ * A regex_t's re_fns points to one of these.
+ */
+struct fns
+{
+ void FUNCPTR(free, (regex_t *));
+};
+
+
+
+/*
+ * the insides of a regex_t, hidden behind a void *
+ */
+struct guts
+{
+ int magic;
+#define GUTSMAGIC 0xfed9
+ int cflags; /* copy of compile flags */
+ long info; /* copy of re_info */
+ size_t nsub; /* copy of re_nsub */
+ struct subre *tree;
+ struct cnfa search; /* for fast preliminary search */
+ int ntree;
+ struct colormap cmap;
+ int FUNCPTR(compare, (const chr *, const chr *, size_t));
+ struct subre *lacons; /* lookahead-constraint vector */
+ int nlacons; /* size of lacons */
+};
projects / wxWidgets.git / commitdiff
