1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* 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);
}
|
