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
|
/*
* 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.
*/
/***************************************************************************
* Description: Simple memory pool *
* Author: Gal Shachor <shachor@il.ibm.com> *
* Version: $Revision: 1305768 $ *
***************************************************************************/
#include "jk_pool.h"
#define DEFAULT_DYNAMIC 10
void jk_open_pool(jk_pool_t *p, jk_pool_atom_t *buf, size_t size)
{
p->pos = 0;
p->size = size;
p->buf = (char *)buf;
p->dyn_pos = 0;
p->dynamic = NULL;
p->dyn_size = 0;
}
void jk_close_pool(jk_pool_t *p)
{
jk_reset_pool(p);
if (p->dynamic) {
free(p->dynamic);
}
}
void jk_reset_pool(jk_pool_t *p)
{
if (p->dyn_pos && p->dynamic) {
size_t i;
for (i = 0; i < p->dyn_pos; i++) {
if (p->dynamic[i]) {
free(p->dynamic[i]);
}
}
}
p->dyn_pos = 0;
p->pos = 0;
}
void *jk_pool_alloc(jk_pool_t *p, size_t size)
{
void *rc = NULL;
if (size == 0)
return NULL;
size = JK_ALIGN_DEFAULT(size);
if ((p->size - p->pos) >= size) {
rc = &(p->buf[p->pos]);
p->pos += size;
}
else {
if (p->dyn_size == p->dyn_pos) {
size_t new_dyn_size = p->dyn_size * 2 + DEFAULT_DYNAMIC;
void **new_dynamic = (void **)realloc(p->dynamic,
new_dyn_size * sizeof(void *));
if (new_dynamic) {
p->dynamic = new_dynamic;
p->dyn_size = new_dyn_size;
}
else {
return NULL;
}
}
rc = p->dynamic[p->dyn_pos] = malloc(size);
if (p->dynamic[p->dyn_pos]) {
p->dyn_pos++;
}
}
return rc;
}
void *jk_pool_calloc(jk_pool_t *p, size_t size)
{
void *rc = jk_pool_alloc(p, size);
if (rc)
memset(rc, 0, size);
return rc;
}
void *jk_pool_realloc(jk_pool_t *p, size_t sz, const void *old, size_t old_sz)
{
char *rc;
if (!p || (sz < old_sz)) {
return NULL;
}
if (!old)
return jk_pool_calloc(p, sz);
rc = (char *)jk_pool_alloc(p, sz);
if (rc) {
memcpy(rc, old, old_sz);
memset(rc + old_sz, 0, sz - old_sz);
}
return rc;
}
char *jk_pool_strdup(jk_pool_t *p, const char *s)
{
char *rc = NULL;
if (s && p) {
size_t size = strlen(s);
if (!size) {
return "";
}
size++;
rc = jk_pool_alloc(p, size);
if (rc) {
memcpy(rc, s, size);
}
}
return rc;
}
char *jk_pool_strcat(jk_pool_t *p, const char *s, const char *a)
{
char *rc = NULL;
if (s && a && p) {
size_t szs = strlen(s);
size_t sza = strlen(a);
if ((szs + sza) == 0) {
return "";
}
rc = jk_pool_alloc(p, szs + sza + 1);
if (rc) {
memcpy(rc, s, szs);
memcpy(rc + szs, a, sza + 1);
}
}
return rc;
}
char *jk_pool_strcatv(jk_pool_t *p, ...)
{
char *cp;
char *rc = NULL;
va_list ap;
if (p) {
char *str;
size_t size = 0;
va_start(ap, p);
while ((str = va_arg(ap, char *)) != 0) {
size += strlen(str);
}
va_end(ap);
if (size == 0) {
return "";
}
size++;
cp = rc = jk_pool_alloc(p, size);
if (rc) {
size_t len = 0;
va_start(ap, p);
while ((str = va_arg(ap, char *)) != 0) {
len = strlen(str);
memcpy(cp, str, len);
cp += len;
}
va_end(ap);
*cp = '\0';
}
}
return rc;
}
|
