/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* An implementaion of nsIException. */

#include "xpcprivate.h"
#include "nsError.h"

#include <iterator>

/***************************************************************************/
/* Quick and dirty mapping of well known result codes to strings. We only
 *  call this when building an exception object, so iterating the short array
 *  is not too bad.
 *
 *  It sure would be nice to have exceptions declared in idl and available
 *  in some more global way at runtime.
 */

static const struct ResultMap {
  nsresult rv;
  const char* name;
  const char* format;
} map[] = {
#define XPC_MSG_DEF(val, format) {(val), #val, format},
#include "xpc.msg"
#undef XPC_MSG_DEF
    {NS_OK, 0, 0}  // sentinel to mark end of array
};

#define RESULT_COUNT (std::size(map) - 1)

// static
bool nsXPCException::NameAndFormatForNSResult(nsresult rv, const char** name,
                                              const char** format) {
  for (const ResultMap* p = map; p->name; p++) {
    if (rv == p->rv) {
      if (name) *name = p->name;
      if (format) *format = p->format;
      return true;
    }
  }
  return false;
}

// static
const void* nsXPCException::IterateNSResults(nsresult* rv, const char** name,
                                             const char** format,
                                             const void** iterp) {
  const ResultMap* p = (const ResultMap*)*iterp;
  if (!p) {
    p = map;
  } else {
    p++;
  }
  if (!p->name) {
    p = nullptr;
  } else {
    if (rv) {
      *rv = p->rv;
    }
    if (name) {
      *name = p->name;
    }
    if (format) {
      *format = p->format;
    }
  }
  *iterp = p;
  return p;
}

// static
uint32_t nsXPCException::GetNSResultCount() { return RESULT_COUNT; }