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
|
/* id.c : implements FSX-internal ID functions
*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*/
#include <assert.h>
#include "id.h"
#include "index.h"
#include "util.h"
#include "private/svn_string_private.h"
svn_boolean_t
svn_fs_x__is_txn(svn_fs_x__change_set_t change_set)
{
return change_set < SVN_FS_X__INVALID_CHANGE_SET;
}
svn_boolean_t
svn_fs_x__is_revision(svn_fs_x__change_set_t change_set)
{
return change_set > SVN_FS_X__INVALID_CHANGE_SET;
}
svn_revnum_t
svn_fs_x__get_revnum(svn_fs_x__change_set_t change_set)
{
return svn_fs_x__is_revision(change_set)
? (svn_revnum_t)change_set
: SVN_INVALID_REVNUM;
}
apr_int64_t
svn_fs_x__get_txn_id(svn_fs_x__change_set_t change_set)
{
return svn_fs_x__is_txn(change_set)
? -change_set + SVN_FS_X__INVALID_CHANGE_SET -1
: SVN_FS_X__INVALID_TXN_ID;
}
svn_fs_x__change_set_t
svn_fs_x__change_set_by_rev(svn_revnum_t revnum)
{
assert(revnum >= SVN_FS_X__INVALID_CHANGE_SET);
return revnum;
}
svn_fs_x__change_set_t
svn_fs_x__change_set_by_txn(apr_int64_t txn_id)
{
assert(txn_id >= SVN_FS_X__INVALID_CHANGE_SET);
return -txn_id + SVN_FS_X__INVALID_CHANGE_SET -1;
}
/* Parse the NUL-terminated ID part at DATA and write the result into *PART.
* Return TRUE if no errors were detected. */
static svn_boolean_t
part_parse(svn_fs_x__id_t *part,
const char *data)
{
part->number = svn__base36toui64(&data, data);
switch (data[0])
{
/* txn number? */
case '-': part->change_set = -svn__base36toui64(&data, data + 1);
return TRUE;
/* revision number? */
case '+': part->change_set = svn__base36toui64(&data, data + 1);
return TRUE;
/* everything else is forbidden */
default: return FALSE;
}
}
/* Write the textual representation of *PART into P and return a pointer
* to the first position behind that string.
*/
static char *
part_unparse(char *p,
const svn_fs_x__id_t *part)
{
p += svn__ui64tobase36(p, part->number);
if (part->change_set >= 0)
{
*(p++) = '+';
p += svn__ui64tobase36(p, part->change_set);
}
else
{
*(p++) = '-';
p += svn__ui64tobase36(p, -part->change_set);
}
return p;
}
/* Operations on ID parts */
svn_boolean_t
svn_fs_x__id_is_root(const svn_fs_x__id_t* part)
{
return part->change_set == 0 && part->number == 0;
}
svn_boolean_t
svn_fs_x__id_eq(const svn_fs_x__id_t *lhs,
const svn_fs_x__id_t *rhs)
{
return lhs->change_set == rhs->change_set && lhs->number == rhs->number;
}
svn_error_t *
svn_fs_x__id_parse(svn_fs_x__id_t *part,
const char *data)
{
if (!part_parse(part, data))
return svn_error_createf(SVN_ERR_FS_MALFORMED_NODEREV_ID, NULL,
"Malformed ID string");
return SVN_NO_ERROR;
}
svn_string_t *
svn_fs_x__id_unparse(const svn_fs_x__id_t *id,
apr_pool_t *result_pool)
{
char string[2 * SVN_INT64_BUFFER_SIZE + 1];
char *p = part_unparse(string, id);
return svn_string_ncreate(string, p - string, result_pool);
}
void
svn_fs_x__id_reset(svn_fs_x__id_t *part)
{
part->change_set = SVN_FS_X__INVALID_CHANGE_SET;
part->number = 0;
}
svn_boolean_t
svn_fs_x__id_used(const svn_fs_x__id_t *part)
{
return part->change_set != SVN_FS_X__INVALID_CHANGE_SET;
}
void
svn_fs_x__init_txn_root(svn_fs_x__id_t *noderev_id,
svn_fs_x__txn_id_t txn_id)
{
noderev_id->change_set = svn_fs_x__change_set_by_txn(txn_id);
noderev_id->number = SVN_FS_X__ITEM_INDEX_ROOT_NODE;
}
void
svn_fs_x__init_rev_root(svn_fs_x__id_t *noderev_id,
svn_revnum_t rev)
{
noderev_id->change_set = svn_fs_x__change_set_by_rev(rev);
noderev_id->number = SVN_FS_X__ITEM_INDEX_ROOT_NODE;
}
int
svn_fs_x__id_compare(const svn_fs_x__id_t *a,
const svn_fs_x__id_t *b)
{
if (a->change_set < b->change_set)
return -1;
if (a->change_set > b->change_set)
return 1;
return a->number < b->number ? -1 : a->number == b->number ? 0 : 1;
}
|
