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
|
/*
* Utility functions for handling cvecs
* This file is #included by regcomp.c.
*/
/*
- 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++;
}
#ifdef USE_MCCE
/*
- 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 n = endp - startp;
int i;
chr *s;
chr *d;
assert(n > 0);
assert(cv->nchrs + n < cv->chrspace - cv->nmccechrs);
assert(cv->nmcces < cv->mccespace);
d = &cv->chrs[cv->chrspace - cv->nmccechrs - n - 1];
cv->mcces[cv->nmcces++] = d;
for (s = startp, i = n; i > 0; s++, i--)
*d++ = *s;
*d++ = 0; /* endmarker */
assert(d == &cv->chrs[cv->chrspace - cv->nmccechrs]);
cv->nmccechrs += n + 1;
}
#endif
/*
- 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);
}
|
