xpcom/ds/nsProperties.cpp

   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 #include "nsProperties.h"
   8
   9 ////////////////////////////////////////////////////////////////////////////////
  10
  11 NS_IMPL_AGGREGATED(nsProperties)
  12 NS_INTERFACE_MAP_BEGIN_AGGREGATED(nsProperties)
  13   NS_INTERFACE_MAP_ENTRY(nsIProperties)
  14 NS_INTERFACE_MAP_END
  15
  16 NS_IMETHODIMP
  17 nsProperties::Get(const char* prop, const nsIID& uuid, void** result)
  18 {
  19   if (NS_WARN_IF(!prop)) {
  20     return NS_ERROR_INVALID_ARG;
  21   }
  22
  23   nsCOMPtr<nsISupports> value;
  24   if (!nsProperties_HashBase::Get(prop, getter_AddRefs(value))) {
  25     return NS_ERROR_FAILURE;
  26   }
  27   return (value) ? value->QueryInterface(uuid, result) : NS_ERROR_NO_INTERFACE;
  28 }
  29
  30 NS_IMETHODIMP
  31 nsProperties::Set(const char* prop, nsISupports* value)
  32 {
  33   if (NS_WARN_IF(!prop)) {
  34     return NS_ERROR_INVALID_ARG;
  35   }
  36   Put(prop, value);
  37   return NS_OK;
  38 }
  39
  40 NS_IMETHODIMP
  41 nsProperties::Undefine(const char* prop)
  42 {
  43   if (NS_WARN_IF(!prop)) {
  44     return NS_ERROR_INVALID_ARG;
  45   }
  46
  47   return nsProperties_HashBase::Remove(prop) ? NS_OK : NS_ERROR_FAILURE;
  48 }
  49
  50 NS_IMETHODIMP
  51 nsProperties::Has(const char* prop, bool* result)
  52 {
  53   if (NS_WARN_IF(!prop)) {
  54     return NS_ERROR_INVALID_ARG;
  55   }
  56
  57   *result = nsProperties_HashBase::Contains(prop);
  58   return NS_OK;
  59 }
  60
  61 NS_IMETHODIMP
  62 nsProperties::GetKeys(uint32_t* aCount, char*** aKeys)
  63 {
  64   if (NS_WARN_IF(!aCount) || NS_WARN_IF(!aKeys)) {
  65     return NS_ERROR_INVALID_ARG;
  66   }
  67
  68   uint32_t count = Count();
  69   char** keys = (char**)moz_xmalloc(count * sizeof(char*));
  70   uint32_t j = 0;
  71
  72   for (auto iter = this->Iter(); !iter.Done(); iter.Next()) {
  73     const char* key = iter.Key();
  74     keys[j] = strdup(key);
  75
  76     if (!keys[j]) {
  77       // Free 'em all
  78       for (uint32_t i = 0; i < j; i++) {
  79         free(keys[i]);
  80       }
  81       free(keys);
  82       return NS_ERROR_OUT_OF_MEMORY;
  83     }
  84     j++;
  85   }
  86
  87   *aCount = count;
  88   *aKeys = keys;
  89   return NS_OK;
  90 }
  91
  92 ////////////////////////////////////////////////////////////////////////////////