Added JsonArrayConst, JsonObjectConst, and JsonVariantConst

src/ArduinoJson/Data/ArrayFunctions.hpp

@@ -0,0 +1,99 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "JsonVariantData.hpp"
+#include "Slot.hpp"
+#include "SlotFunctions.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+
+inline JsonVariantData* arrayAdd(JsonArrayData* arr, MemoryPool* pool) {
+  if (!arr) return 0;
+
+  Slot* slot = new (pool) Slot();
+  if (!slot) return 0;
+
+  slot->next = 0;
+
+  if (arr->tail) {
+    slot->prev = arr->tail;
+    arr->tail->next = slot;
+    arr->tail = slot;
+  } else {
+    slot->prev = 0;
+    arr->head = slot;
+    arr->tail = slot;
+  }
+
+  return &slot->value;
+}
+
+inline Slot* arrayGetSlot(const JsonArrayData* arr, size_t index) {
+  if (!arr) return 0;
+  return slotAdvance(arr->head, index);
+}
+
+inline JsonVariantData* arrayGet(const JsonArrayData* arr, size_t index) {
+  Slot* slot = arrayGetSlot(arr, index);
+  return slot ? &slot->value : 0;
+}
+
+inline void arrayRemove(JsonArrayData* arr, Slot* slot) {
+  if (!arr || !slot) return;
+
+  if (slot->prev)
+    slot->prev->next = slot->next;
+  else
+    arr->head = slot->next;
+  if (slot->next)
+    slot->next->prev = slot->prev;
+  else
+    arr->tail = slot->prev;
+}
+
+inline void arrayRemove(JsonArrayData* arr, size_t index) {
+  arrayRemove(arr, arrayGetSlot(arr, index));
+}
+
+inline void arrayClear(JsonArrayData* arr) {
+  if (!arr) return;
+  arr->head = 0;
+  arr->tail = 0;
+}
+
+bool variantCopy(JsonVariantData*, const JsonVariantData*, MemoryPool*);
+
+inline bool arrayCopy(JsonArrayData* dst, const JsonArrayData* src,
+                      MemoryPool* pool) {
+  if (!dst || !src) return false;
+  arrayClear(dst);
+  for (Slot* s = src->head; s; s = s->next) {
+    if (!variantCopy(arrayAdd(dst, pool), &s->value, pool)) return false;
+  }
+  return true;
+}
+
+bool variantEquals(const JsonVariantData*, const JsonVariantData*);
+
+inline bool arrayEquals(const JsonArrayData* a1, const JsonArrayData* a2) {
+  if (a1 == a2) return true;
+  if (!a1 || !a2) return false;
+  Slot* s1 = a1->head;
+  Slot* s2 = a2->head;
+  for (;;) {
+    if (s1 == s2) return true;
+    if (!s1 || !s2) return false;
+    if (!variantEquals(&s1->value, &s2->value)) return false;
+    s1 = s1->next;
+    s2 = s2->next;
+  }
+}
+
+inline size_t arraySize(const JsonArrayData* arr) {
+  if (!arr) return 0;
+  return slotSize(arr->head);
+}
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Data/IsVariant.hpp

@@ -1,15 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#pragma once
-
-#include "../Polyfills/type_traits.hpp"
-
-namespace ARDUINOJSON_NAMESPACE {
-
-class JsonVariantTag {};
-
-template <typename T>
-struct IsVariant : is_base_of<JsonVariantTag, T> {};
-}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Data/JsonVariantAs.hpp

@@ -6,6 +6,13 @@
 
 namespace ARDUINOJSON_NAMESPACE {
 
+class JsonArray;
+class JsonArrayConst;
+class JsonObject;
+class JsonObjectConst;
+class JsonVariant;
+class JsonVariantConst;
+
 // A metafunction that returns the type of the value returned by
 // JsonVariant::as<T>()
 template <typename T>
@@ -18,4 +25,25 @@ struct JsonVariantAs<char*> {
   typedef const char* type;
 };
 
+// A metafunction that returns the type of the value returned by
+// JsonVariant::as<T>()
+template <typename T>
+struct JsonVariantConstAs {
+  typedef typename JsonVariantAs<T>::type type;
+};
+
+template <>
+struct JsonVariantConstAs<JsonVariant> {
+  typedef JsonVariantConst type;
+};
+
+template <>
+struct JsonVariantConstAs<JsonObject> {
+  typedef JsonObjectConst type;
+};
+
+template <>
+struct JsonVariantConstAs<JsonArray> {
+  typedef JsonArrayConst type;
+};
 }  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Data/ObjectFunctions.hpp

@@ -0,0 +1,123 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "JsonVariantData.hpp"
+#include "SlotFunctions.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+
+template <typename TKey>
+inline Slot* objectFindSlot(const JsonObjectData* obj, TKey key) {
+  if (!obj) return 0;
+  Slot* slot = obj->head;
+  while (slot) {
+    if (key.equals(slot->key)) break;
+    slot = slot->next;
+  }
+  return slot;
+}
+
+template <typename TKey>
+inline bool objectContainsKey(const JsonObjectData* obj, const TKey& key) {
+  return objectFindSlot(obj, key) != 0;
+}
+
+template <typename TKey>
+inline JsonVariantData* objectAdd(JsonObjectData* obj, TKey key,
+                                  MemoryPool* pool) {
+  Slot* slot = new (pool) Slot();
+  if (!slot) return 0;
+
+  slot->next = 0;
+
+  if (obj->tail) {
+    slot->prev = obj->tail;
+    obj->tail->next = slot;
+    obj->tail = slot;
+  } else {
+    slot->prev = 0;
+    obj->head = slot;
+    obj->tail = slot;
+  }
+
+  if (!slotSetKey(slot, key, pool)) return 0;
+  return &slot->value;
+}
+
+template <typename TKey>
+inline JsonVariantData* objectSet(JsonObjectData* obj, TKey key,
+                                  MemoryPool* pool) {
+  if (!obj) return 0;
+
+  // ignore null key
+  if (key.isNull()) return 0;
+
+  // search a matching key
+  Slot* slot = objectFindSlot(obj, key);
+  if (slot) return &slot->value;
+
+  return objectAdd(obj, key, pool);
+}
+
+template <typename TKey>
+inline JsonVariantData* objectGet(const JsonObjectData* obj, TKey key) {
+  Slot* slot = objectFindSlot(obj, key);
+  return slot ? &slot->value : 0;
+}
+
+inline void objectClear(JsonObjectData* obj) {
+  if (!obj) return;
+  obj->head = 0;
+  obj->tail = 0;
+}
+
+inline void objectRemove(JsonObjectData* obj, Slot* slot) {
+  if (!obj) return;
+  if (!slot) return;
+  if (slot->prev)
+    slot->prev->next = slot->next;
+  else
+    obj->head = slot->next;
+  if (slot->next)
+    slot->next->prev = slot->prev;
+  else
+    obj->tail = slot->prev;
+}
+
+inline size_t objectSize(const JsonObjectData* obj) {
+  if (!obj) return 0;
+  return slotSize(obj->head);
+}
+
+// bool variantCopy(JsonVariantData*, const JsonVariantData*, MemoryPool*);
+
+inline bool objectCopy(JsonObjectData* dst, const JsonObjectData* src,
+                       MemoryPool* pool) {
+  if (!dst || !src) return false;
+  objectClear(dst);
+  for (Slot* s = src->head; s; s = s->next) {
+    JsonVariantData* var;
+    if (s->value.keyIsStatic)
+      var = objectAdd(dst, ZeroTerminatedRamStringConst(s->key), pool);
+    else
+      var = objectAdd(dst, ZeroTerminatedRamString(s->key), pool);
+    if (!variantCopy(var, &s->value, pool)) return false;
+  }
+  return true;
+}
+
+inline bool objectEquals(const JsonObjectData* o1, const JsonObjectData* o2) {
+  if (o1 == o2) return true;
+  if (!o1 || !o2) return false;
+
+  for (Slot* s = o1->head; s; s = s->next) {
+    JsonVariantData* v1 = &s->value;
+    JsonVariantData* v2 = objectGet(o2, makeString(s->key));
+    if (!variantEquals(v1, v2)) return false;
+  }
+  return true;
+}
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Data/SlotFunctions.hpp

@@ -0,0 +1,59 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "../Strings/StringTypes.hpp"
+#include "JsonVariantData.hpp"
+#include "Slot.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+
+template <typename TKey>
+inline bool slotSetKey(Slot* slot, TKey key, MemoryPool* pool) {
+  const char* dup = key.save(pool);
+  if (!dup) return false;
+  slot->key = dup;
+  slot->value.keyIsStatic = false;
+  return true;
+}
+
+inline bool slotSetKey(Slot* slot, ZeroTerminatedRamStringConst key,
+                       MemoryPool* pool) {
+  slot->key = key.save(pool);
+  slot->value.keyIsStatic = true;
+  return true;
+}
+
+inline bool slotSetKey(Slot* slot, StringInMemoryPool key, MemoryPool* pool) {
+  slot->key = key.save(pool);
+  slot->value.keyIsStatic = false;
+  return true;
+}
+
+inline const Slot* slotAdvance(const Slot* slot, size_t distance) {
+  while (distance && slot) {
+    slot = slot->next;
+    distance--;
+  }
+  return slot;
+}
+
+inline Slot* slotAdvance(Slot* slot, size_t distance) {
+  while (distance && slot) {
+    slot = slot->next;
+    distance--;
+  }
+  return slot;
+}
+
+inline size_t slotSize(const Slot* slot) {
+  size_t n = 0;
+  while (slot) {
+    n++;
+    slot = slot->next;
+  }
+  return n;
+}
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Data/VariantAs.hpp

@@ -0,0 +1,48 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "../Serialization/DynamicStringWriter.hpp"
+#include "VariantFunctions.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+
+class JsonVariantConst;
+
+template <typename T>
+inline typename enable_if<is_integral<T>::value, T>::type variantAs(
+    const JsonVariantData* _data) {
+  return variantAsIntegral<T>(_data);
+}
+
+template <typename T>
+inline typename enable_if<is_same<T, bool>::value, T>::type variantAs(
+    const JsonVariantData* _data) {
+  return variantAsBoolean(_data);
+}
+
+template <typename T>
+inline typename enable_if<is_floating_point<T>::value, T>::type variantAs(
+    const JsonVariantData* _data) {
+  return variantAsFloat<T>(_data);
+}
+
+template <typename T>
+inline typename enable_if<is_same<T, const char*>::value ||
+                              is_same<T, char*>::value,
+                          const char*>::type
+variantAs(const JsonVariantData* _data) {
+  return variantAsString(_data);
+}
+
+template <typename T>
+inline typename enable_if<is_same<JsonVariantConst, T>::value, T>::type
+variantAs(const JsonVariantData* _data);
+
+template <typename T>
+inline typename enable_if<IsWriteableString<T>::value, T>::type variantAs(
+    const JsonVariantData* _data);
+
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Data/VariantAsImpl.hpp

@@ -0,0 +1,29 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "../JsonVariant.hpp"
+#include "../Serialization/DynamicStringWriter.hpp"
+#include "VariantFunctions.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+
+template <typename T>
+inline typename enable_if<is_same<JsonVariantConst, T>::value, T>::type
+variantAs(const JsonVariantData* _data) {
+  return JsonVariantConst(_data);
+}
+
+template <typename T>
+inline typename enable_if<IsWriteableString<T>::value, T>::type variantAs(
+    const JsonVariantData* _data) {
+  const char* cstr = variantAsString(_data);
+  if (cstr) return T(cstr);
+  T s;
+  serializeJson(JsonVariantConst(_data), s);
+  return s;
+}
+
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Data/VariantFunctions.hpp

@@ -0,0 +1,287 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "../Numbers/parseFloat.hpp"
+#include "../Numbers/parseInteger.hpp"
+#include "../SerializedValue.hpp"
+#include "ArrayFunctions.hpp"
+#include "JsonVariantData.hpp"
+#include "ObjectFunctions.hpp"
+#include "Slot.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+
+template <typename T>
+inline T variantAsIntegral(const JsonVariantData* var) {
+  if (!var) return 0;
+  switch (var->type) {
+    case JSON_POSITIVE_INTEGER:
+    case JSON_BOOLEAN:
+      return T(var->content.asInteger);
+    case JSON_NEGATIVE_INTEGER:
+      return T(~var->content.asInteger + 1);
+    case JSON_LINKED_STRING:
+    case JSON_OWNED_STRING:
+      return parseInteger<T>(var->content.asString);
+    case JSON_FLOAT:
+      return T(var->content.asFloat);
+    default:
+      return 0;
+  }
+}
+
+inline bool variantAsBoolean(const JsonVariantData* var) {
+  return variantAsIntegral<int>(var) != 0;
+}
+
+// T = float/double
+template <typename T>
+inline T variantAsFloat(const JsonVariantData* var) {
+  if (!var) return 0;
+  switch (var->type) {
+    case JSON_POSITIVE_INTEGER:
+    case JSON_BOOLEAN:
+      return static_cast<T>(var->content.asInteger);
+    case JSON_NEGATIVE_INTEGER:
+      return -static_cast<T>(var->content.asInteger);
+    case JSON_LINKED_STRING:
+    case JSON_OWNED_STRING:
+      return parseFloat<T>(var->content.asString);
+    case JSON_FLOAT:
+      return static_cast<T>(var->content.asFloat);
+    default:
+      return 0;
+  }
+}
+
+inline const char* variantAsString(const JsonVariantData* var) {
+  if (!var) return 0;
+  if (var &&
+      (var->type == JSON_LINKED_STRING || var->type == JSON_OWNED_STRING))
+    return var->content.asString;
+  else
+    return 0;
+}
+
+inline JsonArrayData* variantAsArray(JsonVariantData* var) {
+  if (var && var->type == JSON_ARRAY)
+    return &var->content.asArray;
+  else
+    return 0;
+}
+
+inline const JsonArrayData* variantAsArray(const JsonVariantData* var) {
+  if (var && var->type == JSON_ARRAY)
+    return &var->content.asArray;
+  else
+    return 0;
+}
+
+inline JsonObjectData* variantAsObject(JsonVariantData* var) {
+  if (var && var->type == JSON_OBJECT)
+    return &var->content.asObject;
+  else
+    return 0;
+}
+
+inline const JsonObjectData* variantAsObject(const JsonVariantData* var) {
+  if (var && var->type == JSON_OBJECT)
+    return &var->content.asObject;
+  else
+    return 0;
+}
+
+inline bool variantSetBoolean(JsonVariantData* var, bool value) {
+  if (!var) return false;
+  var->type = JSON_BOOLEAN;
+  var->content.asInteger = static_cast<JsonUInt>(value);
+  return true;
+}
+
+inline bool variantSetFloat(JsonVariantData* var, JsonFloat value) {
+  if (!var) return false;
+  var->type = JSON_FLOAT;
+  var->content.asFloat = value;
+  return true;
+}
+
+template <typename T>
+inline bool variantSetSignedInteger(JsonVariantData* var, T value) {
+  if (!var) return false;
+  if (value >= 0) {
+    var->type = JSON_POSITIVE_INTEGER;
+    var->content.asInteger = static_cast<JsonUInt>(value);
+  } else {
+    var->type = JSON_NEGATIVE_INTEGER;
+    var->content.asInteger = ~static_cast<JsonUInt>(value) + 1;
+  }
+  return true;
+}
+
+inline bool variantSetSignedInteger(JsonVariantData* var, JsonUInt value) {
+  if (!var) return false;
+  var->type = JSON_POSITIVE_INTEGER;
+  var->content.asInteger = static_cast<JsonUInt>(value);
+  return true;
+}
+
+inline bool variantSetLinkedRaw(JsonVariantData* var,
+                                SerializedValue<const char*> value) {
+  if (!var) return false;
+  var->type = JSON_LINKED_RAW;
+  var->content.asRaw.data = value.data();
+  var->content.asRaw.size = value.size();
+  return true;
+}
+
+template <typename T>
+inline bool variantSetOwnedRaw(JsonVariantData* var, SerializedValue<T> value,
+                               MemoryPool* pool) {
+  if (!var) return false;
+  const char* dup = makeString(value.data(), value.size()).save(pool);
+  if (dup) {
+    var->type = JSON_OWNED_RAW;
+    var->content.asRaw.data = dup;
+    var->content.asRaw.size = value.size();
+    return true;
+  } else {
+    var->type = JSON_NULL;
+    return false;
+  }
+}
+
+template <typename T>
+inline bool variantSetString(JsonVariantData* var, T value, MemoryPool* pool) {
+  if (!var) return false;
+  const char* dup = value.save(pool);
+  if (dup) {
+    var->type = JSON_OWNED_STRING;
+    var->content.asString = dup;
+    return true;
+  } else {
+    var->type = JSON_NULL;
+    return false;
+  }
+}
+
+inline bool variantSetString(JsonVariantData* var, const char* value) {
+  if (!var) return false;
+  var->type = JSON_LINKED_STRING;
+  var->content.asString = value;
+  return true;
+}
+
+inline bool variantSetString(JsonVariantData* var, const char* value,
+                             MemoryPool* pool) {
+  return variantSetString(var, makeString(const_cast<char*>(value)), pool);
+}
+
+inline void variantSetNull(JsonVariantData* var) {
+  if (var) var->type = JSON_NULL;
+}
+
+inline JsonArrayData* variantToArray(JsonVariantData* var) {
+  if (!var) return 0;
+  var->type = JSON_ARRAY;
+  var->content.asArray.head = 0;
+  var->content.asArray.tail = 0;
+  return &var->content.asArray;
+}
+
+inline JsonObjectData* variantToObject(JsonVariantData* var) {
+  if (!var) return 0;
+  var->type = JSON_OBJECT;
+  var->content.asObject.head = 0;
+  var->content.asObject.tail = 0;
+  return &var->content.asObject;
+}
+
+inline bool variantCopy(JsonVariantData* dst, const JsonVariantData* src,
+                        MemoryPool* pool) {
+  if (!dst) return false;
+  if (!src) {
+    dst->type = JSON_NULL;
+    return true;
+  }
+  switch (src->type) {
+    case JSON_ARRAY:
+      return arrayCopy(variantToArray(dst), &src->content.asArray, pool);
+    case JSON_OBJECT:
+      return objectCopy(variantToObject(dst), &src->content.asObject, pool);
+    case JSON_OWNED_STRING:
+      return variantSetString(dst, src->content.asString, pool);
+    case JSON_OWNED_RAW:
+      return variantSetOwnedRaw(
+          dst,
+          serialized(const_cast<char*>(src->content.asRaw.data),
+                     src->content.asRaw.size),
+          pool);
+    default:
+      *dst = *src;
+      return true;
+  }
+}
+
+inline bool variantIsInteger(const JsonVariantData* var) {
+  return var && (var->type == JSON_POSITIVE_INTEGER ||
+                 var->type == JSON_NEGATIVE_INTEGER);
+}
+
+inline bool variantIsFloat(const JsonVariantData* var) {
+  return var &&
+         (var->type == JSON_FLOAT || var->type == JSON_POSITIVE_INTEGER ||
+          var->type == JSON_NEGATIVE_INTEGER);
+}
+
+inline bool variantIsString(const JsonVariantData* var) {
+  return var &&
+         (var->type == JSON_LINKED_STRING || var->type == JSON_OWNED_STRING);
+}
+
+inline bool variantIsArray(const JsonVariantData* var) {
+  return var && var->type == JSON_ARRAY;
+}
+
+inline bool variantIsObject(const JsonVariantData* var) {
+  return var && var->type == JSON_OBJECT;
+}
+
+inline bool variantIsNull(const JsonVariantData* var) {
+  return var == 0 || var->type == JSON_NULL;
+}
+
+inline bool variantEquals(const JsonVariantData* a, const JsonVariantData* b) {
+  if (a == b) return true;
+  if (!a || !b) return false;
+  if (a->type != b->type) return false;
+
+  switch (a->type) {
+    case JSON_LINKED_RAW:
+    case JSON_OWNED_RAW:
+    case JSON_LINKED_STRING:
+    case JSON_OWNED_STRING:
+      return !strcmp(a->content.asString, b->content.asString);
+
+    case JSON_BOOLEAN:
+    case JSON_POSITIVE_INTEGER:
+    case JSON_NEGATIVE_INTEGER:
+      return a->content.asInteger == b->content.asInteger;
+
+    case JSON_ARRAY:
+      return arrayEquals(&a->content.asArray, &b->content.asArray);
+
+    case JSON_OBJECT:
+      return objectEquals(&a->content.asObject, &b->content.asObject);
+
+    case JSON_FLOAT:
+      return a->content.asFloat == b->content.asFloat;
+
+    case JSON_NULL:
+    default:
+      return true;
+  }
+}
+}  // namespace ARDUINOJSON_NAMESPACE