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
|
/*
* 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.
*/
/*
* Notes:
* Only (selected) functions in _this_ file should treat chr* as non-constant.
*/
/*
- newcvec - allocate a new cvec
^ static struct cvec *newcvec(int, int);
*/
static struct cvec *
newcvec(
int nchrs, /* to hold this many chrs... */
int nranges) /* ... and this many ranges... */
{
size_t nc = (size_t)nchrs + (size_t)nranges*2;
size_t n = sizeof(struct cvec) + nc*sizeof(chr);
struct cvec *cv = (struct cvec *) MALLOC(n);
if (cv == NULL) {
return NULL;
}
cv->chrspace = nchrs;
cv->chrs = (chr *)(((char *)cv)+sizeof(struct cvec));
cv->ranges = cv->chrs + nchrs;
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(
struct cvec *cv) /* character vector */
{
assert(cv != NULL);
cv->nchrs = 0;
cv->nranges = 0;
return cv;
}
/*
- addchr - add a chr to a cvec
^ static void addchr(struct cvec *, pchr);
*/
static void
addchr(
struct cvec *cv, /* character vector */
pchr c) /* character to add */
{
cv->chrs[cv->nchrs++] = (chr)c;
}
/*
- addrange - add a range to a cvec
^ static void addrange(struct cvec *, pchr, pchr);
*/
static void
addrange(
struct cvec *cv, /* character vector */
pchr from, /* first character of range */
pchr to) /* last character of range */
{
assert(cv->nranges < cv->rangespace);
cv->ranges[cv->nranges*2] = (chr)from;
cv->ranges[cv->nranges*2 + 1] = (chr)to;
cv->nranges++;
}
/*
- getcvec - get a cvec, remembering it as v->cv
^ static struct cvec *getcvec(struct vars *, int, int);
*/
static struct cvec *
getcvec(
struct vars *v, /* context */
int nchrs, /* to hold this many chrs... */
int nranges) /* ... and this many ranges... */
{
if ((v->cv != NULL) && (nchrs <= v->cv->chrspace) &&
(nranges <= v->cv->rangespace)) {
return clearcvec(v->cv);
}
if (v->cv != NULL) {
freecvec(v->cv);
}
v->cv = newcvec(nchrs, nranges);
if (v->cv == NULL) {
ERR(REG_ESPACE);
}
return v->cv;
}
/*
- freecvec - free a cvec
^ static void freecvec(struct cvec *);
*/
static void
freecvec(
struct cvec *cv) /* character vector */
{
FREE(cv);
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
|
