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
|
/*-------------------------------------------------------------------------
*
* Simple list facilities for frontend code
*
* Data structures for simple lists of OIDs and strings. The support for
* these is very primitive compared to the backend's List facilities, but
* it's all we need in, eg, pg_dump.
*
*
* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/fe_utils/simple_list.c
*
*-------------------------------------------------------------------------
*/
#include "postgres_fe.h"
#include "fe_utils/simple_list.h"
/*
* Append an OID to the list.
*/
void
simple_oid_list_append(SimpleOidList *list, Oid val)
{
SimpleOidListCell *cell;
cell = (SimpleOidListCell *) pg_malloc(sizeof(SimpleOidListCell));
cell->next = NULL;
cell->val = val;
if (list->tail)
list->tail->next = cell;
else
list->head = cell;
list->tail = cell;
}
/*
* Is OID present in the list?
*/
bool
simple_oid_list_member(SimpleOidList *list, Oid val)
{
SimpleOidListCell *cell;
for (cell = list->head; cell; cell = cell->next)
{
if (cell->val == val)
return true;
}
return false;
}
/*
* Append a string to the list.
*
* The given string is copied, so it need not survive past the call.
*/
void
simple_string_list_append(SimpleStringList *list, const char *val)
{
SimpleStringListCell *cell;
cell = (SimpleStringListCell *)
pg_malloc(offsetof(SimpleStringListCell, val) + strlen(val) + 1);
cell->next = NULL;
cell->touched = false;
strcpy(cell->val, val);
if (list->tail)
list->tail->next = cell;
else
list->head = cell;
list->tail = cell;
}
/*
* Is string present in the list?
*
* If found, the "touched" field of the first match is set true.
*/
bool
simple_string_list_member(SimpleStringList *list, const char *val)
{
SimpleStringListCell *cell;
for (cell = list->head; cell; cell = cell->next)
{
if (strcmp(cell->val, val) == 0)
{
cell->touched = true;
return true;
}
}
return false;
}
/*
* Destroy an OID list
*/
void
simple_oid_list_destroy(SimpleOidList *list)
{
SimpleOidListCell *cell;
cell = list->head;
while (cell != NULL)
{
SimpleOidListCell *next;
next = cell->next;
pg_free(cell);
cell = next;
}
}
/*
* Destroy a string list
*/
void
simple_string_list_destroy(SimpleStringList *list)
{
SimpleStringListCell *cell;
cell = list->head;
while (cell != NULL)
{
SimpleStringListCell *next;
next = cell->next;
pg_free(cell);
cell = next;
}
}
/*
* Find first not-touched list entry, if there is one.
*/
const char *
simple_string_list_not_touched(SimpleStringList *list)
{
SimpleStringListCell *cell;
for (cell = list->head; cell; cell = cell->next)
{
if (!cell->touched)
return cell->val;
}
return NULL;
}
/*
* Append a pointer to the list.
*
* Caller must ensure that the pointer remains valid.
*/
void
simple_ptr_list_append(SimplePtrList *list, void *ptr)
{
SimplePtrListCell *cell;
cell = (SimplePtrListCell *) pg_malloc(sizeof(SimplePtrListCell));
cell->next = NULL;
cell->ptr = ptr;
if (list->tail)
list->tail->next = cell;
else
list->head = cell;
list->tail = cell;
}
|
