1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 /* An implementaion of nsIException. */
8
9 #include "xpcprivate.h"
10 #include "nsError.h"
11
12 /***************************************************************************/
13 /* Quick and dirty mapping of well known result codes to strings. We only
14 * call this when building an exception object, so iterating the short array
15 * is not too bad.
16 *
17 * It sure would be nice to have exceptions declared in idl and available
18 * in some more global way at runtime.
19 */
20
21 static const struct ResultMap {
22 nsresult rv;
23 const char* name;
24 const char* format;
25 } map[] = {
26 #define XPC_MSG_DEF(val, format) {(val), #val, format},
27 #include "xpc.msg"
28 #undef XPC_MSG_DEF
29 {NS_OK, 0, 0} // sentinel to mark end of array
30 };
31
32 #define RESULT_COUNT ((sizeof(map) / sizeof(map[0])) - 1)
33
34 // static
NameAndFormatForNSResult(nsresult rv,const char ** name,const char ** format)35 bool nsXPCException::NameAndFormatForNSResult(nsresult rv, const char** name,
36 const char** format) {
37 for (const ResultMap* p = map; p->name; p++) {
38 if (rv == p->rv) {
39 if (name) *name = p->name;
40 if (format) *format = p->format;
41 return true;
42 }
43 }
44 return false;
45 }
46
47 // static
IterateNSResults(nsresult * rv,const char ** name,const char ** format,const void ** iterp)48 const void* nsXPCException::IterateNSResults(nsresult* rv, const char** name,
49 const char** format,
50 const void** iterp) {
51 const ResultMap* p = (const ResultMap*)*iterp;
52 if (!p) {
53 p = map;
54 } else {
55 p++;
56 }
57 if (!p->name) {
58 p = nullptr;
59 } else {
60 if (rv) {
61 *rv = p->rv;
62 }
63 if (name) {
64 *name = p->name;
65 }
66 if (format) {
67 *format = p->format;
68 }
69 }
70 *iterp = p;
71 return p;
72 }
73
74 // static
GetNSResultCount()75 uint32_t nsXPCException::GetNSResultCount() { return RESULT_COUNT; }
76