206e1b41ae02e05b948795e8f3a9681378847858
[awesomized/libmemcached] / libmemcached / error.c
1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
2 *
3 * LibMemcached
4 *
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * * Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following disclaimer
17 * in the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * * The names of its contributors may not be used to endorse or
21 * promote products derived from this software without specific prior
22 * written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
27 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
28 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 *
36 */
37
38 #include "libmemcached/common.h"
39
40 struct memcached_error_st
41 {
42 memcached_st *root;
43 struct memcached_error_st *next;
44 memcached_return_t rc;
45 int local_errno;
46 size_t size;
47 char c_str[];
48 };
49
50 static memcached_error_st *_set(memcached_st *memc, memcached_string_t *str)
51 {
52 if (! memc)
53 return NULL;
54
55 memcached_error_st *error;
56 error= (struct memcached_error_st *)libmemcached_malloc(memc, sizeof(struct memcached_error_st) +(str ? str->size :0) +1);
57
58 if (! error)
59 return NULL;
60
61 error->root= memc;
62
63 if (str)
64 {
65 error->size= str->size;
66 memcpy(error->c_str, str->c_str, str->size);
67 }
68 error->c_str[(str ? str->size :0)]= 0;
69
70 error->next= memc->error_messages;
71 memc->error_messages= error;
72
73 return error;
74 }
75
76 memcached_return_t memcached_set_error(memcached_st *memc, memcached_return_t rc, memcached_string_t *str)
77 {
78 if (rc == MEMCACHED_SUCCESS)
79 return MEMCACHED_SUCCESS;
80
81 memcached_error_st *error= _set(memc, str);
82
83 if (error)
84 {
85 error->local_errno= 0;
86 error->rc= rc;
87 }
88
89 return rc;
90 }
91
92 memcached_return_t memcached_set_errno(memcached_st *memc, int local_errno, memcached_string_t *str)
93 {
94 memcached_error_st *error= _set(memc, str);
95
96 if (error)
97 {
98 error->local_errno= local_errno;
99 error->rc= MEMCACHED_ERRNO;
100 }
101
102 return error->rc;
103 }
104
105 static void _error_free(memcached_error_st *error)
106 {
107 if (! error)
108 return;
109
110 _error_free(error->next);
111
112 if (error && error->root)
113 {
114 libmemcached_free(error->root, error);
115 }
116 else if (error)
117 {
118 free(error);
119 }
120 }
121
122 void memcached_error_free(memcached_st *self)
123 {
124 if (! self)
125 return;
126
127 _error_free(self->error_messages);
128 }
129
130 const char *memcached_last_error_message(memcached_st *memc)
131 {
132 if (! memc)
133 return memcached_strerror(memc, MEMCACHED_INVALID_ARGUMENTS);
134
135 if (! memc->error_messages)
136 return memcached_strerror(memc, MEMCACHED_SUCCESS);
137
138 if (! memc->error_messages->c_str)
139 {
140 return memcached_strerror(memc, memc->error_messages->rc);
141 }
142
143 return memc->error_messages->c_str;
144 }
145
146 memcached_return_t memcached_last_error(memcached_st *memc)
147 {
148 if (! memc)
149 return MEMCACHED_INVALID_ARGUMENTS;
150
151 if (! memc->error_messages)
152 return MEMCACHED_SUCCESS;
153
154 return memc->error_messages->rc;
155 }
156
157 memcached_return_t memcached_last_error_errno(memcached_st *memc)
158 {
159 if (! memc)
160 return MEMCACHED_INVALID_ARGUMENTS;
161
162 if (! memc->error_messages)
163 return MEMCACHED_SUCCESS;
164
165 return memc->error_messages->local_errno;
166 }