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
212
213
214
215
216
217
218
|
/*
* Copyright (C) 2009-2011 the libgit2 contributors
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "common.h"
#include "repository.h"
#include "vector.h"
static const double resize_factor = 1.75;
static const size_t minimum_size = 8;
static int resize_vector(git_vector *v)
{
v->_alloc_size = ((unsigned int)(v->_alloc_size * resize_factor)) + 1;
if (v->_alloc_size < minimum_size)
v->_alloc_size = minimum_size;
v->contents = git__realloc(v->contents, v->_alloc_size * sizeof(void *));
if (v->contents == NULL)
return GIT_ENOMEM;
return GIT_SUCCESS;
}
void git_vector_free(git_vector *v)
{
assert(v);
git__free(v->contents);
v->contents = NULL;
v->length = 0;
v->_alloc_size = 0;
}
int git_vector_init(git_vector *v, unsigned int initial_size, git_vector_cmp cmp)
{
assert(v);
memset(v, 0x0, sizeof(git_vector));
if (initial_size == 0)
initial_size = minimum_size;
v->_alloc_size = initial_size;
v->_cmp = cmp;
v->length = 0;
v->sorted = 1;
v->contents = git__malloc(v->_alloc_size * sizeof(void *));
if (v->contents == NULL)
return GIT_ENOMEM;
return GIT_SUCCESS;
}
int git_vector_insert(git_vector *v, void *element)
{
assert(v);
if (v->length >= v->_alloc_size) {
if (resize_vector(v) < 0)
return GIT_ENOMEM;
}
v->contents[v->length++] = element;
v->sorted = 0;
return GIT_SUCCESS;
}
int git_vector_insert_sorted(git_vector *v, void *element, int (*on_dup)(void **old, void *new))
{
int error = GIT_SUCCESS;
size_t pos;
assert(v && v->_cmp);
if (!v->sorted)
git_vector_sort(v);
if (v->length >= v->_alloc_size) {
if (resize_vector(v) < 0)
return GIT_ENOMEM;
}
error = git__bsearch(v->contents, v->length, element, v->_cmp, &pos);
/* If we found the element and have a duplicate handler callback,
* invoke it. If it returns an error, then cancel insert, otherwise
* proceed with normal insert.
*/
if (error == GIT_SUCCESS && on_dup != NULL) {
error = on_dup(&v->contents[pos], element);
if (error != GIT_SUCCESS)
return error;
}
/* shift elements to the right */
if (pos < v->length) {
memmove(v->contents + pos + 1, v->contents + pos,
(v->length - pos) * sizeof(void *));
}
v->contents[pos] = element;
v->length++;
return GIT_SUCCESS;
}
void git_vector_sort(git_vector *v)
{
assert(v);
if (v->sorted || v->_cmp == NULL)
return;
git__tsort(v->contents, v->length, v->_cmp);
v->sorted = 1;
}
int git_vector_bsearch2(git_vector *v, git_vector_cmp key_lookup, const void *key)
{
size_t pos;
assert(v && key && key_lookup);
/* need comparison function to sort the vector */
if (v->_cmp == NULL)
return git__throw(GIT_ENOTFOUND, "Can't sort vector. No comparison function set");
git_vector_sort(v);
if (git__bsearch(v->contents, v->length, key, key_lookup,
&pos) == GIT_SUCCESS)
return (int)pos;
return git__throw(GIT_ENOTFOUND, "Can't find element");
}
int git_vector_search2(git_vector *v, git_vector_cmp key_lookup, const void *key)
{
unsigned int i;
assert(v && key && key_lookup);
for (i = 0; i < v->length; ++i) {
if (key_lookup(key, v->contents[i]) == 0)
return i;
}
return git__throw(GIT_ENOTFOUND, "Can't find element");
}
static int strict_comparison(const void *a, const void *b)
{
return (a == b) ? 0 : -1;
}
int git_vector_search(git_vector *v, const void *entry)
{
return git_vector_search2(v, v->_cmp ? v->_cmp : strict_comparison, entry);
}
int git_vector_bsearch(git_vector *v, const void *key)
{
return git_vector_bsearch2(v, v->_cmp, key);
}
int git_vector_remove(git_vector *v, unsigned int idx)
{
unsigned int i;
assert(v);
if (idx >= v->length || v->length == 0)
return git__throw(GIT_ENOTFOUND, "Can't remove element. Index out of bounds");
for (i = idx; i < v->length - 1; ++i)
v->contents[i] = v->contents[i + 1];
v->length--;
return GIT_SUCCESS;
}
void git_vector_uniq(git_vector *v)
{
git_vector_cmp cmp;
unsigned int i, j;
if (v->length <= 1)
return;
git_vector_sort(v);
cmp = v->_cmp ? v->_cmp : strict_comparison;
for (i = 0, j = 1 ; j < v->length; ++j)
if (!cmp(v->contents[i], v->contents[j]))
v->contents[i] = v->contents[j];
else
v->contents[++i] = v->contents[j];
v->length -= j - i - 1;
}
void git_vector_clear(git_vector *v)
{
assert(v);
v->length = 0;
v->sorted = 1;
}
|
