The Tor Browser: js/xpconnect/src/XPCException.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* vim: set ts=8 sts=4 et sw=4 tw=99: */

     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/. */

     7 /* An implementaion of nsIException. */

     9 #include "xpcprivate.h"

    10 #include "nsError.h"

    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 */

    21 static const struct ResultMap

    22 {nsresult rv; const char* name; const char* format;} map[] = {

    23 #define XPC_MSG_DEF(val, format) \

    24     {(val), #val, format},

    25 #include "xpc.msg"

    26 #undef XPC_MSG_DEF

    27     {NS_OK,0,0}   // sentinel to mark end of array

    28 };

    30 #define RESULT_COUNT ((sizeof(map) / sizeof(map[0]))-1)

    32 // static

    33 bool

    34 nsXPCException::NameAndFormatForNSResult(nsresult rv,

    35                                          const char** name,

    36                                          const char** format)

    37 {

    39     for (const ResultMap* p = map; p->name; p++) {

    40         if (rv == p->rv) {

    41             if (name) *name = p->name;

    42             if (format) *format = p->format;

    43             return true;

    44         }

    45     }

    46     return false;

    47 }

    49 // static

    50 const void*

    51 nsXPCException::IterateNSResults(nsresult* rv,

    52                                  const char** name,

    53                                  const char** format,

    54                                  const void** iterp)

    55 {

    56     const ResultMap* p = (const ResultMap*) *iterp;

    57     if (!p)

    58         p = map;

    59     else

    60         p++;

    61     if (!p->name)

    62         p = nullptr;

    63     else {

    64         if (rv)

    65             *rv = p->rv;

    66         if (name)

    67             *name = p->name;

    68         if (format)

    69             *format = p->format;

    70     }

    71     *iterp = p;

    72     return p;

    73 }

    75 // static

    76 uint32_t

    77 nsXPCException::GetNSResultCount()

    78 {

    79     return RESULT_COUNT;

    80 }

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