shared_source/c_tcl_base_7_5_w_mods/regc_cvec.c

/* $Header$ */
/*
 * Utility functions for handling cvecs
 * 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.
 *
 */

/*
 - newcvec - allocate a new cvec
 ^ static struct cvec *newcvec(int, int, int);
 */
static struct cvec *
newcvec(nchrs, nranges, nmcces)
int nchrs;                      /* to hold this many chrs... */
int nranges;                    /* ... and this many ranges... */
int nmcces;                     /* ... and this many MCCEs */
{
        size_t n;
        size_t nc;
        struct cvec *cv;

        nc = (size_t)nchrs + (size_t)nmcces*(MAXMCCE+1) + (size_t)nranges*2;
        n = sizeof(struct cvec) + (size_t)(nmcces-1)*sizeof(chr *) +
                                                                nc*sizeof(chr);
        cv = (struct cvec *)MALLOC(n);
        if (cv == NULL)
                return NULL;
        cv->chrspace = nc;
        cv->chrs = (chr *)&cv->mcces[nmcces];   /* chrs just after MCCE ptrs */
        cv->mccespace = nmcces;
        cv->ranges = cv->chrs + nchrs + nmcces*(MAXMCCE+1);
        cv->rangespace = nranges;
        return clearcvec(cv);
}

/*
 - clearcvec - clear a possibly-new cvec
 * Returns pointer as convenience.
 ^ static struct cvec *clearcvec(struct cvec *);
 */
static struct cvec *
clearcvec(cv)
struct cvec *cv;
{
        int i;

        assert(cv != NULL);
        cv->nchrs = 0;
        assert(cv->chrs == (chr *)&cv->mcces[cv->mccespace]);
        cv->nmcces = 0;
        cv->nmccechrs = 0;
        cv->nranges = 0;
        for (i = 0; i < cv->mccespace; i++)
                cv->mcces[i] = NULL;

        return cv;
}

/*
 - addchr - add a chr to a cvec
 ^ static VOID addchr(struct cvec *, pchr);
 */
static VOID
addchr(cv, c)
struct cvec *cv;
pchr c;
{
        assert(cv->nchrs < cv->chrspace - cv->nmccechrs);
        cv->chrs[cv->nchrs++] = (chr)c;
}

/*
 - addrange - add a range to a cvec
 ^ static VOID addrange(struct cvec *, pchr, pchr);
 */
static VOID
addrange(cv, from, to)
struct cvec *cv;
pchr from;
pchr to;
{
        assert(cv->nranges < cv->rangespace);
        cv->ranges[cv->nranges*2] = (chr)from;
        cv->ranges[cv->nranges*2 + 1] = (chr)to;
        cv->nranges++;
}

/*
 - addmcce - add an MCCE to a cvec
 ^ static VOID addmcce(struct cvec *, chr *, chr *);
 */
static VOID
addmcce(cv, startp, endp)
struct cvec *cv;
chr *startp;                    /* beginning of text */
chr *endp;                      /* just past end of text */
{
        int len;
        int i;
        chr *s;
        chr *d;

        if (startp == NULL && endp == NULL)
                return;
        len = endp - startp;
        assert(len > 0);
        assert(cv->nchrs + len < cv->chrspace - cv->nmccechrs);
        assert(cv->nmcces < cv->mccespace);
        d = &cv->chrs[cv->chrspace - cv->nmccechrs - len - 1];
        cv->mcces[cv->nmcces++] = d;
        for (s = startp, i = len; i > 0; s++, i--)
                *d++ = *s;
        *d++ = 0;               /* endmarker */
        assert(d == &cv->chrs[cv->chrspace - cv->nmccechrs]);
        cv->nmccechrs += len + 1;
}

/*
 - haschr - does a cvec contain this chr?
 ^ static int haschr(struct cvec *, pchr);
 */
static int                      /* predicate */
haschr(cv, c)
struct cvec *cv;
pchr c;
{
        int i;
        chr *p;

        for (p = cv->chrs, i = cv->nchrs; i > 0; p++, i--)
                if (*p == c)
                        return 1;
        for (p = cv->ranges, i = cv->nranges; i > 0; p += 2, i--)
                if (*p <= c && c <= *(p+1))
                        return 1;
        return 0;
}

/*
 - getcvec - get a cvec, remembering it as v->cv
 ^ static struct cvec *getcvec(struct vars *, int, int, int);
 */
static struct cvec *
getcvec(v, nchrs, nranges, nmcces)
struct vars *v;
int nchrs;                      /* to hold this many chrs... */
int nranges;                    /* ... and this many ranges... */
int nmcces;                     /* ... and this many MCCEs */
{
        if (v->cv != NULL && nchrs <= v->cv->chrspace &&
                                        nranges <= v->cv->rangespace &&
                                        nmcces <= v->cv->mccespace)
                return clearcvec(v->cv);

        if (v->cv != NULL)
                freecvec(v->cv);
        v->cv = newcvec(nchrs, nranges, nmcces);
        if (v->cv == NULL)
                ERR(REG_ESPACE);

        return v->cv;
}

/*
 - freecvec - free a cvec
 ^ static VOID freecvec(struct cvec *);
 */
static VOID
freecvec(cv)
struct cvec *cv;
{
        FREE(cv);
}

/* End of regc_cvec.c */
1	/* $Header$ */
2	/*
3	* Utility functions for handling cvecs
4	* This file is #included by regcomp.c.
5	*
6	* Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
7	*
8	* Development of this software was funded, in part, by Cray Research Inc.,
9	* UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
10	* Corporation, none of whom are responsible for the results. The author
11	* thanks all of them.
12	*
13	* Redistribution and use in source and binary forms -- with or without
14	* modification -- are permitted for any purpose, provided that
15	* redistributions in source form retain this entire copyright notice and
16	* indicate the origin and nature of any modifications.
17	*
18	* I'd appreciate being given credit for this package in the documentation
19	* of software which uses it, but that is not a requirement.
20	*
21	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
22	* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
23	* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
24	* HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
27	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
30	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31	*
32	*/
33
34	/*
35	- newcvec - allocate a new cvec
36	^ static struct cvec *newcvec(int, int, int);
37	*/
38	static struct cvec *
39	newcvec(nchrs, nranges, nmcces)
40	int nchrs; /* to hold this many chrs... */
41	int nranges; /* ... and this many ranges... */
42	int nmcces; /* ... and this many MCCEs */
43	{
44	size_t n;
45	size_t nc;
46	struct cvec *cv;
47
48	nc = (size_t)nchrs + (size_t)nmcces(MAXMCCE+1) + (size_t)nranges2;
49	n = sizeof(struct cvec) + (size_t)(nmcces-1)sizeof(chr ) +
50	nc*sizeof(chr);
51	cv = (struct cvec *)MALLOC(n);
52	if (cv == NULL)
53	return NULL;
54	cv->chrspace = nc;
55	cv->chrs = (chr )&cv->mcces[nmcces]; / chrs just after MCCE ptrs */
56	cv->mccespace = nmcces;
57	cv->ranges = cv->chrs + nchrs + nmcces*(MAXMCCE+1);
58	cv->rangespace = nranges;
59	return clearcvec(cv);
60	}
61
62	/*
63	- clearcvec - clear a possibly-new cvec
64	* Returns pointer as convenience.
65	^ static struct cvec clearcvec(struct cvec );
66	*/
67	static struct cvec *
68	clearcvec(cv)
69	struct cvec *cv;
70	{
71	int i;
72
73	assert(cv != NULL);
74	cv->nchrs = 0;
75	assert(cv->chrs == (chr *)&cv->mcces[cv->mccespace]);
76	cv->nmcces = 0;
77	cv->nmccechrs = 0;
78	cv->nranges = 0;
79	for (i = 0; i < cv->mccespace; i++)
80	cv->mcces[i] = NULL;
81
82	return cv;
83	}
84
85	/*
86	- addchr - add a chr to a cvec
87	^ static VOID addchr(struct cvec *, pchr);
88	*/
89	static VOID
90	addchr(cv, c)
91	struct cvec *cv;
92	pchr c;
93	{
94	assert(cv->nchrs < cv->chrspace - cv->nmccechrs);
95	cv->chrs[cv->nchrs++] = (chr)c;
96	}
97
98	/*
99	- addrange - add a range to a cvec
100	^ static VOID addrange(struct cvec *, pchr, pchr);
101	*/
102	static VOID
103	addrange(cv, from, to)
104	struct cvec *cv;
105	pchr from;
106	pchr to;
107	{
108	assert(cv->nranges < cv->rangespace);
109	cv->ranges[cv->nranges*2] = (chr)from;
110	cv->ranges[cv->nranges*2 + 1] = (chr)to;
111	cv->nranges++;
112	}
113
114	/*
115	- addmcce - add an MCCE to a cvec
116	^ static VOID addmcce(struct cvec , chr , chr *);
117	*/
118	static VOID
119	addmcce(cv, startp, endp)
120	struct cvec *cv;
121	chr startp; / beginning of text */
122	chr endp; / just past end of text */
123	{
124	int len;
125	int i;
126	chr *s;
127	chr *d;
128
129	if (startp == NULL && endp == NULL)
130	return;
131	len = endp - startp;
132	assert(len > 0);
133	assert(cv->nchrs + len < cv->chrspace - cv->nmccechrs);
134	assert(cv->nmcces < cv->mccespace);
135	d = &cv->chrs[cv->chrspace - cv->nmccechrs - len - 1];
136	cv->mcces[cv->nmcces++] = d;
137	for (s = startp, i = len; i > 0; s++, i--)
138	d++ = s;
139	d++ = 0; / endmarker */
140	assert(d == &cv->chrs[cv->chrspace - cv->nmccechrs]);
141	cv->nmccechrs += len + 1;
142	}
143
144	/*
145	- haschr - does a cvec contain this chr?
146	^ static int haschr(struct cvec *, pchr);
147	*/
148	static int /* predicate */
149	haschr(cv, c)
150	struct cvec *cv;
151	pchr c;
152	{
153	int i;
154	chr *p;
155
156	for (p = cv->chrs, i = cv->nchrs; i > 0; p++, i--)
157	if (*p == c)
158	return 1;
159	for (p = cv->ranges, i = cv->nranges; i > 0; p += 2, i--)
160	if (p <= c && c <= (p+1))
161	return 1;
162	return 0;
163	}
164
165	/*
166	- getcvec - get a cvec, remembering it as v->cv
167	^ static struct cvec getcvec(struct vars , int, int, int);
168	*/
169	static struct cvec *
170	getcvec(v, nchrs, nranges, nmcces)
171	struct vars *v;
172	int nchrs; /* to hold this many chrs... */
173	int nranges; /* ... and this many ranges... */
174	int nmcces; /* ... and this many MCCEs */
175	{
176	if (v->cv != NULL && nchrs <= v->cv->chrspace &&
177	nranges <= v->cv->rangespace &&
178	nmcces <= v->cv->mccespace)
179	return clearcvec(v->cv);
180
181	if (v->cv != NULL)
182	freecvec(v->cv);
183	v->cv = newcvec(nchrs, nranges, nmcces);
184	if (v->cv == NULL)
185	ERR(REG_ESPACE);
186
187	return v->cv;
188	}
189
190	/*
191	- freecvec - free a cvec
192	^ static VOID freecvec(struct cvec *);
193	*/
194	static VOID
195	freecvec(cv)
196	struct cvec *cv;
197	{
198	FREE(cv);
199	}
200
201	/* End of regc_cvec.c */