-
Notifications
You must be signed in to change notification settings - Fork 17
/
vect.h
211 lines (179 loc) · 7.8 KB
/
vect.h
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
199
200
201
202
203
204
205
206
207
208
209
210
211
/*
* This file is part of ltrace.
* Copyright (C) 2011,2012,2013 Petr Machata, Red Hat Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef VECT_H
#define VECT_H
#include <stddef.h>
#include <assert.h>
#include "callback.h"
/* Vector is an array that can grow as needed to accommodate the data
* that it needs to hold. ELT_SIZE is also used as an elementary
* sanity check, because the array itself is not typed. */
struct vect
{
void *data;
size_t size; /* In elements. */
size_t allocated; /* In elements. */
size_t elt_size; /* In bytes. */
};
/* Initialize VEC, which will hold elements of size ELT_SIZE. */
void vect_init(struct vect *vec, size_t elt_size);
/* Initialize VECP, which will hold elements of type ELT_TYPE. */
#define VECT_INIT(VECP, ELT_TYPE) \
(vect_init(VECP, sizeof(ELT_TYPE)))
/* Initialize TARGET by copying over contents of vector SOURCE. If
* CLONE is non-NULL, it's evoked on each element, and should clone
* SRC into TGT. It should return 0 on success or negative value on
* failure. DATA is passed to CLONE verbatim. This function returns
* 0 on success or negative value on failure. In case of failure, if
* DTOR is non-NULL, it is invoked on all hitherto created elements
* with the same DATA. If one of CLONE, DTOR is non-NULL, then both
* have to be. */
int vect_clone(struct vect *target, const struct vect *source,
int (*clone)(void *tgt, const void *src, void *data),
void (*dtor)(void *elt, void *data),
void *data);
/* Destroy VEC, which holds elements of type ELT_TYPE, using DTOR. */
#define VECT_CLONE(TGT_VEC, SRC_VEC, ELT_TYPE, CLONE, DTOR, DATA) \
/* xxx GCC-ism necessary to get in the safety latches. */ \
({ \
const struct vect *_source_vec = (SRC_VEC); \
assert(_source_vec->elt_size == sizeof(ELT_TYPE)); \
/* Check that callbacks are typed properly. */ \
void (*_dtor_callback)(ELT_TYPE *, void *) = DTOR; \
int (*_clone_callback)(ELT_TYPE *, const ELT_TYPE *, \
void *) = CLONE; \
vect_clone((TGT_VEC), _source_vec, \
(int (*)(void *, const void *, \
void *))_clone_callback, \
(void (*)(void *, void *))_dtor_callback, \
DATA); \
})
/* Return number of elements in VEC. */
size_t vect_size(const struct vect *vec);
/* Emptiness predicate. */
int vect_empty(const struct vect *vec);
/* Accessor. Fetch ELT_NUM-th argument of type ELT_TYPE from the
* vector referenced by VECP. */
#define VECT_ELEMENT(VECP, ELT_TYPE, ELT_NUM) \
(assert((VECP)->elt_size == sizeof(ELT_TYPE)), \
assert((ELT_NUM) < (VECP)->size), \
((ELT_TYPE *)(VECP)->data) + (ELT_NUM))
#define VECT_BACK(VECP, ELT_TYPE) \
VECT_ELEMENT(VECP, ELT_TYPE, (VECP)->size - 1)
/* Copy element referenced by ELTP to the end of VEC. The object
* referenced by ELTP is now owned by VECT. Returns 0 if the
* operation was successful, or negative value on error. */
int vect_pushback(struct vect *vec, void *eltp);
/* Drop last element of VECP. This is like calling
* vect_erase(VEC, vect_size(VEC)-1, vect_size(VEC), DTOR, DATA); */
void vect_popback(struct vect *vec,
void (*dtor)(void *emt, void *data), void *data);
#define VECT_POPBACK(VECP, ELT_TYPE, DTOR, DATA) \
do \
VECT_ERASE((VECP), ELT_TYPE, \
vect_size(VECP) - 1, vect_size(VECP), \
DTOR, DATA); \
while (0)
/* Drop elements START (inclusive) to END (non-inclusive) of VECP. If
* DTOR is non-NULL, it is called on each of the removed elements.
* DATA is passed verbatim to DTOR. */
void vect_erase(struct vect *vec, size_t start, size_t end,
void (*dtor)(void *emt, void *data), void *data);
#define VECT_ERASE(VECP, ELT_TYPE, START, END, DTOR, DATA) \
do { \
assert((VECP)->elt_size == sizeof(ELT_TYPE)); \
/* Check that DTOR is typed properly. */ \
void (*_dtor_callback)(ELT_TYPE *, void *) = DTOR; \
vect_erase((VECP), (START), (END), \
(void (*)(void *, void *))_dtor_callback, DATA); \
} while (0)
/* Copy element referenced by ELTP to the end of VEC. See
* vect_pushback for details. In addition, make a check whether VECP
* holds elements of the right size. */
#define VECT_PUSHBACK(VECP, ELTP) \
(assert((VECP)->elt_size == sizeof(*(ELTP))), \
vect_pushback((VECP), (ELTP)))
/* Make sure that VEC can hold at least COUNT elements. Return 0 on
* success, negative value on failure. */
int vect_reserve(struct vect *vec, size_t count);
/* Make sure that VEC can accommodate COUNT additional elements. */
int vect_reserve_additional(struct vect *vec, size_t count);
/* Destroy VEC. If DTOR is non-NULL, then it's called on each element
* of the vector. DATA is passed to DTOR verbatim. The memory
* pointed-to by VEC is not freed. */
void vect_destroy(struct vect *vec,
void (*dtor)(void *emt, void *data), void *data);
/* Destroy VEC, which holds elements of type ELT_TYPE, using DTOR. */
#define VECT_DESTROY(VECP, ELT_TYPE, DTOR, DATA) \
do { \
assert((VECP)->elt_size == sizeof(ELT_TYPE)); \
/* Check that DTOR is typed properly. */ \
void (*_dtor_callback)(ELT_TYPE *, void *) = DTOR; \
vect_destroy((VECP), (void (*)(void *, void *))_dtor_callback, \
DATA); \
} while (0)
/* Iterate through vector VEC. See callback.h for notes on iteration
* interfaces. */
void *vect_each(struct vect *vec, void *start_after,
enum callback_status (*cb)(void *, void *), void *data);
#define VECT_EACH(VECP, ELT_TYPE, START_AFTER, CB, DATA) \
/* xxx GCC-ism necessary to get in the safety latches. */ \
({ \
assert((VECP)->elt_size == sizeof(ELT_TYPE)); \
/* Check that CB is typed properly. */ \
enum callback_status (*_cb)(ELT_TYPE *, void *) = CB; \
ELT_TYPE *_start_after = (START_AFTER); \
(ELT_TYPE *)vect_each((VECP), _start_after, \
(enum callback_status \
(*)(void *, void *))_cb, \
DATA); \
})
/* Iterate through vector VEC. See callback.h for notes on iteration
* interfaces. */
const void *vect_each_cst(const struct vect *vec, const void *start_after,
enum callback_status (*cb)(const void *, void *),
void *data);
#define VECT_EACH_CST(VECP, ELT_TYPE, START_AFTER, CB, DATA) \
/* xxx GCC-ism necessary to get in the safety latches. */ \
({ \
assert((VECP)->elt_size == sizeof(ELT_TYPE)); \
/* Check that CB is typed properly. */ \
enum callback_status (*_cb)(const ELT_TYPE *, void *) = CB; \
const ELT_TYPE *start_after = (START_AFTER); \
(const ELT_TYPE *)vect_each_cst((VECP), start_after, \
(enum callback_status \
(*)(const void *, \
void *))_cb, \
DATA); \
})
/* Call qsort on elements of VECT, with COMPAR as a comparison
* function. */
void vect_qsort(struct vect *vec, int (*compar)(const void *, const void *));
#define VECT_QSORT(VECP, ELT_TYPE, COMPAR) \
do { \
assert((VECP)->elt_size == sizeof(ELT_TYPE)); \
/* Check that CB is typed properly. */ \
int (*_compar)(const ELT_TYPE *, const ELT_TYPE *) = COMPAR; \
vect_qsort((VECP), \
(int (*)(const void *, const void *))_compar); \
} while (0)
/* A dtor which calls 'free' on elements of a vector. */
void vect_dtor_string(char **key, void *data);
#endif /* VECT_H */