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
|
#include "versions.h"
// variables
struct node *version_tree = NULL;
// prototypes
int read_layout_versions(char *, char *);
void read_revision_versions(char *rev, int rev_index, char *);
#define CURRENT_SNAPSHOT "mirror_metadata.current.snapshot"
// public:
int versions_init(struct file_system_info *fsinfo){
int i = 0;
// printf("[Function: init_versions] Received repo path %s;\n", path);
gtreenew(&version_tree);
fsinfo->rev_count = single(int);
if ((fsinfo->rev_count[0] = gather_revisions(fsinfo, fsinfo->repos[0], data_dir)) <= 0)
return -1;
read_layout_versions(fsinfo->revs[fsinfo->rev_count[0] - 1], NULL);
for (i = fsinfo->rev_count[0] - 1; i >= 0; i--){
add_snapshot(fsinfo->revs[i], CURRENT_SNAPSHOT, data_dir);
read_revision_versions(fsinfo->revs[i], fsinfo->rev_count[0] - i - 1, NULL);
};
return 0;
};
int versions_init_multi(struct file_system_info *fsinfo){
#define versions_init_multi_free_revs \
if (fsinfo->revs != NULL){ \
gmstrcpy(&snapshot, data_dir, "/", CURRENT_SNAPSHOT, 0); \
unlink(snapshot); \
gstrdel(snapshot); \
}
#define versions_init_multi_finish(value) { \
init_versions_multi_free_revs; \
return value; \
}
int i = 0, j = 0;
char *snapshot = NULL;
gtreenew(&version_tree);
fsinfo->rev_count = calloc(fsinfo->repo_count, sizeof(int));
for (i = 0; i < fsinfo->repo_count; i++){
if ((fsinfo->rev_count[i] = gather_revisions(fsinfo, fsinfo->repos[i], data_dir)) == -1)
continue;
if (add_repo_dir(fsinfo->repo_names[i], version_tree) == -1){
versions_init_multi_free_revs;
continue;
};
if (read_layout_versions(fsinfo->revs[fsinfo->rev_count[i] - 1], fsinfo->repo_names[i]) == -1){
versions_init_multi_free_revs;
continue;
};
for (j = fsinfo->rev_count[i] - 1; j >= 0; j--){
add_snapshot(fsinfo->revs[j], CURRENT_SNAPSHOT, data_dir);
read_revision_versions(fsinfo->revs[j], fsinfo->rev_count[i] - j - 1, fsinfo->repo_names[i]);
};
versions_init_multi_free_revs;
};
return 0;
};
int versions_get_file(struct file_system_info *fsinfo, const char *path, struct stats **stats){
(void) fsinfo;
return gtreeget(version_tree, path, stats);
};
char** versions_get_children(struct file_system_info *fsinfo, const char *path){
(void) fsinfo;
return gtreecld(version_tree, path);
};
// private:
int read_layout_versions(char *revision, char *prefix){
#define read_layout_versions_finish(value) { \
gstrdel(path); \
if (file != NULL) \
fclose(file); \
return value; \
}
char *path = NULL;
FILE *file = NULL;
struct stats stats;
if (gmstrcpy(&path, data_dir, "/", revision, 0) != 0)
read_layout_versions_finish(-1);
if ((file = fopen(path, "r")) == NULL)
read_layout_versions_finish(-1);
// reading only from single snapshot;
while ((read_stats(&stats, file) == 0) && ((stats.type == S_IFREG) || (stats.type == S_IFDIR))){
if (prefix == NULL)
gmstrcpy(&stats.path, "/", stats.internal, 0);
else
gmstrcpy(&stats.path, prefix, "/", stats.internal, 0);
gpthcldptr(&stats.name, stats.path);
stats.type = S_IFDIR;
stats.ctime = time(0);
stats.atime = time(0);
stats.size = DIR_SIZE;
gtreeadd(version_tree, &stats, stats.path);
};
read_layout_versions_finish(0);
};
void read_revision_versions(char *revision, int rev_index, char *prefix){
#define read_revision_versions_finish { \
gmstrcpy(&path, data_dir, "/", revision, 0); \
unlink(path); \
gstrdel(path); \
gstrdel(sufix); \
gstrdel(file_path); \
if (file != NULL) \
fclose(file); \
return; \
}
char *path = NULL;
char *sufix = get_revs_dir(revision);
char *file_path = NULL;
struct stats stats, *temp;
FILE *file = NULL;
if (gmstrcpy(&path, data_dir, "/", CURRENT_SNAPSHOT, 0) != 0)
read_revision_versions_finish;
if ((file = fopen(path, "r")) == NULL)
read_revision_versions_finish;
while (read_stats(&stats, file) == 0){
if (prefix == NULL)
gstrcpy(&file_path, stats.internal);
else // prefix != NULL
gmstrcpy(&file_path, "/", prefix, "/", stats.internal, 0);
if (prefix == NULL)
gmstrcpy(&stats.path, stats.internal, "/", sufix, 0);
else // prefix != NULL
gmstrcpy(&stats.path, prefix, "/", stats.internal, "/", sufix, 0);
if (stats.type == -1)
gtreedel(version_tree, stats.path);
else if ((gtreeget(version_tree, file_path, &temp) == 0) && (stats.type == S_IFREG)){
gpthcldptr(&stats.name, stats.path);
stats.rev = rev_index;
gtreeadd(version_tree, &stats, stats.path);
};
};
read_revision_versions_finish;
};
|
