/[dtapublic]/projs/trunk/shared_source/tcl_base/regc_cvec.c
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Revision 29 - (show annotations) (download)
Sat Oct 8 07:08:47 2016 UTC (7 years, 8 months ago) by dashley
Original Path: to_be_filed/sf_code/esrgpcpj/shared/tcl_base/regc_cvec.c
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1 /* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/regc_cvec.c,v 1.1.1.1 2001/06/13 04:31:42 dtashley Exp $ */
2
3 /*
4 * Utility functions for handling cvecs
5 * This file is #included by regcomp.c.
6 *
7 * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
8 *
9 * Development of this software was funded, in part, by Cray Research Inc.,
10 * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
11 * Corporation, none of whom are responsible for the results. The author
12 * thanks all of them.
13 *
14 * Redistribution and use in source and binary forms -- with or without
15 * modification -- are permitted for any purpose, provided that
16 * redistributions in source form retain this entire copyright notice and
17 * indicate the origin and nature of any modifications.
18 *
19 * I'd appreciate being given credit for this package in the documentation
20 * of software which uses it, but that is not a requirement.
21 *
22 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
23 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
24 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
25 * HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 */
34
35 /*
36 - newcvec - allocate a new cvec
37 ^ static struct cvec *newcvec(int, int, int);
38 */
39 static struct cvec *
40 newcvec(nchrs, nranges, nmcces)
41 int nchrs; /* to hold this many chrs... */
42 int nranges; /* ... and this many ranges... */
43 int nmcces; /* ... and this many MCCEs */
44 {
45 size_t n;
46 size_t nc;
47 struct cvec *cv;
48
49 nc = (size_t)nchrs + (size_t)nmcces*(MAXMCCE+1) + (size_t)nranges*2;
50 n = sizeof(struct cvec) + (size_t)(nmcces-1)*sizeof(chr *) +
51 nc*sizeof(chr);
52 cv = (struct cvec *)MALLOC(n);
53 if (cv == NULL)
54 return NULL;
55 cv->chrspace = nc;
56 cv->chrs = (chr *)&cv->mcces[nmcces]; /* chrs just after MCCE ptrs */
57 cv->mccespace = nmcces;
58 cv->ranges = cv->chrs + nchrs + nmcces*(MAXMCCE+1);
59 cv->rangespace = nranges;
60 return clearcvec(cv);
61 }
62
63 /*
64 - clearcvec - clear a possibly-new cvec
65 * Returns pointer as convenience.
66 ^ static struct cvec *clearcvec(struct cvec *);
67 */
68 static struct cvec *
69 clearcvec(cv)
70 struct cvec *cv;
71 {
72 int i;
73
74 assert(cv != NULL);
75 cv->nchrs = 0;
76 assert(cv->chrs == (chr *)&cv->mcces[cv->mccespace]);
77 cv->nmcces = 0;
78 cv->nmccechrs = 0;
79 cv->nranges = 0;
80 for (i = 0; i < cv->mccespace; i++)
81 cv->mcces[i] = NULL;
82
83 return cv;
84 }
85
86 /*
87 - addchr - add a chr to a cvec
88 ^ static VOID addchr(struct cvec *, pchr);
89 */
90 static VOID
91 addchr(cv, c)
92 struct cvec *cv;
93 pchr c;
94 {
95 assert(cv->nchrs < cv->chrspace - cv->nmccechrs);
96 cv->chrs[cv->nchrs++] = (chr)c;
97 }
98
99 /*
100 - addrange - add a range to a cvec
101 ^ static VOID addrange(struct cvec *, pchr, pchr);
102 */
103 static VOID
104 addrange(cv, from, to)
105 struct cvec *cv;
106 pchr from;
107 pchr to;
108 {
109 assert(cv->nranges < cv->rangespace);
110 cv->ranges[cv->nranges*2] = (chr)from;
111 cv->ranges[cv->nranges*2 + 1] = (chr)to;
112 cv->nranges++;
113 }
114
115 /*
116 - addmcce - add an MCCE to a cvec
117 ^ static VOID addmcce(struct cvec *, chr *, chr *);
118 */
119 static VOID
120 addmcce(cv, startp, endp)
121 struct cvec *cv;
122 chr *startp; /* beginning of text */
123 chr *endp; /* just past end of text */
124 {
125 int len;
126 int i;
127 chr *s;
128 chr *d;
129
130 if (startp == NULL && endp == NULL)
131 return;
132 len = endp - startp;
133 assert(len > 0);
134 assert(cv->nchrs + len < cv->chrspace - cv->nmccechrs);
135 assert(cv->nmcces < cv->mccespace);
136 d = &cv->chrs[cv->chrspace - cv->nmccechrs - len - 1];
137 cv->mcces[cv->nmcces++] = d;
138 for (s = startp, i = len; i > 0; s++, i--)
139 *d++ = *s;
140 *d++ = 0; /* endmarker */
141 assert(d == &cv->chrs[cv->chrspace - cv->nmccechrs]);
142 cv->nmccechrs += len + 1;
143 }
144
145 /*
146 - haschr - does a cvec contain this chr?
147 ^ static int haschr(struct cvec *, pchr);
148 */
149 static int /* predicate */
150 haschr(cv, c)
151 struct cvec *cv;
152 pchr c;
153 {
154 int i;
155 chr *p;
156
157 for (p = cv->chrs, i = cv->nchrs; i > 0; p++, i--)
158 if (*p == c)
159 return 1;
160 for (p = cv->ranges, i = cv->nranges; i > 0; p += 2, i--)
161 if (*p <= c && c <= *(p+1))
162 return 1;
163 return 0;
164 }
165
166 /*
167 - getcvec - get a cvec, remembering it as v->cv
168 ^ static struct cvec *getcvec(struct vars *, int, int, int);
169 */
170 static struct cvec *
171 getcvec(v, nchrs, nranges, nmcces)
172 struct vars *v;
173 int nchrs; /* to hold this many chrs... */
174 int nranges; /* ... and this many ranges... */
175 int nmcces; /* ... and this many MCCEs */
176 {
177 if (v->cv != NULL && nchrs <= v->cv->chrspace &&
178 nranges <= v->cv->rangespace &&
179 nmcces <= v->cv->mccespace)
180 return clearcvec(v->cv);
181
182 if (v->cv != NULL)
183 freecvec(v->cv);
184 v->cv = newcvec(nchrs, nranges, nmcces);
185 if (v->cv == NULL)
186 ERR(REG_ESPACE);
187
188 return v->cv;
189 }
190
191 /*
192 - freecvec - free a cvec
193 ^ static VOID freecvec(struct cvec *);
194 */
195 static VOID
196 freecvec(cv)
197 struct cvec *cv;
198 {
199 FREE(cv);
200 }
201
202 /* $History: regc_cvec.c $
203 *
204 * ***************** Version 1 *****************
205 * User: Dtashley Date: 1/02/01 Time: 12:03a
206 * Created in $/IjuScripter, IjuConsole/Source/Tcl Base
207 * Initial check-in.
208 */
209
210 /* End of REGC_CVEC.C */

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