1 /* $NetBSD: error.c,v 1.4 2023/06/19 21:41:42 christos Exp $ */
2
3 /*
4 * Copyright (c) 2010 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Portions Copyright (c) 2010 Apple Inc. All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 *
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * 3. Neither the name of the Institute nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38 #include "baselocl.h"
39
40 struct heim_error {
41 int error_code;
42 heim_string_t msg;
43 struct heim_error *next;
44 };
45
46 static void
error_dealloc(void * ptr)47 error_dealloc(void *ptr)
48 {
49 struct heim_error *p = ptr;
50 heim_release(p->msg);
51 heim_release(p->next);
52 }
53
54 static int
error_cmp(void * a,void * b)55 error_cmp(void *a, void *b)
56 {
57 struct heim_error *ap = a, *bp = b;
58 if (ap->error_code == bp->error_code)
59 return 0;
60 return heim_cmp(ap->msg, bp->msg);
61 }
62
63 static unsigned long
error_hash(void * ptr)64 error_hash(void *ptr)
65 {
66 struct heim_error *p = ptr;
67 return p->error_code;
68 }
69
70 struct heim_type_data _heim_error_object = {
71 HEIM_TID_ERROR,
72 "error-object",
73 NULL,
74 error_dealloc,
75 NULL,
76 error_cmp,
77 error_hash,
78 NULL
79 };
80
81 heim_error_t
heim_error_create_enomem(void)82 heim_error_create_enomem(void)
83 {
84 /* This is an immediate object; see heim_number_create() */
85 return (heim_error_t)heim_number_create(ENOMEM);
86 }
87
88
89 void
heim_error_create_opt(heim_error_t * error,int error_code,const char * fmt,...)90 heim_error_create_opt(heim_error_t *error, int error_code, const char *fmt, ...)
91 {
92 if (error) {
93 va_list ap;
94 va_start(ap, fmt);
95 *error = heim_error_createv(error_code, fmt, ap);
96 va_end(ap);
97 }
98 }
99
100 heim_error_t
heim_error_create(int error_code,const char * fmt,...)101 heim_error_create(int error_code, const char *fmt, ...)
102 {
103 heim_error_t e;
104 va_list ap;
105
106 va_start(ap, fmt);
107 e = heim_error_createv(error_code, fmt, ap);
108 va_end(ap);
109
110 return e;
111 }
112
113 heim_error_t
heim_error_createv(int error_code,const char * fmt,va_list ap)114 heim_error_createv(int error_code, const char *fmt, va_list ap)
115 {
116 heim_error_t e;
117 char *str;
118 int len;
119 int save_errno = errno;
120
121 str = malloc(1024);
122 errno = save_errno;
123 if (str == NULL)
124 return heim_error_create_enomem();
125 len = vsnprintf(str, 1024, fmt, ap);
126 errno = save_errno;
127 if (len < 0) {
128 free(str);
129 return NULL; /* XXX We should have a special heim_error_t for this */
130 }
131
132 e = _heim_alloc_object(&_heim_error_object, sizeof(struct heim_error));
133 if (e) {
134 e->msg = heim_string_create(str);
135 e->error_code = error_code;
136 }
137 free(str);
138
139 errno = save_errno;
140 return e;
141 }
142
143 heim_string_t
heim_error_copy_string(heim_error_t error)144 heim_error_copy_string(heim_error_t error)
145 {
146 if (heim_get_tid(error) != HEIM_TID_ERROR) {
147 if (heim_get_tid(error) == heim_number_get_type_id())
148 return __heim_string_constant(strerror(heim_number_get_int((heim_number_t)error)));
149 heim_abort("invalid heim_error_t");
150 }
151 /* XXX concat all strings */
152 return heim_retain(error->msg);
153 }
154
155 int
heim_error_get_code(heim_error_t error)156 heim_error_get_code(heim_error_t error)
157 {
158 if (error == NULL)
159 return -1;
160 if (heim_get_tid(error) != HEIM_TID_ERROR) {
161 if (heim_get_tid(error) == heim_number_get_type_id())
162 return heim_number_get_int((heim_number_t)error);
163 heim_abort("invalid heim_error_t");
164 }
165 return error->error_code;
166 }
167
168 heim_error_t
heim_error_append(heim_error_t top,heim_error_t append)169 heim_error_append(heim_error_t top, heim_error_t append)
170 {
171 if (heim_get_tid(top) != HEIM_TID_ERROR) {
172 if (heim_get_tid(top) == heim_number_get_type_id())
173 return top;
174 heim_abort("invalid heim_error_t");
175 }
176 if (top->next)
177 heim_release(top->next);
178 top->next = heim_retain(append);
179 return top;
180 }
181