Fixed segmentation fault in DynamicJsonBuffer when memory allocation fails (issue #92)

src/DynamicJsonBuffer.cpp

@@ -1,79 +0,0 @@
-// Copyright Benoit Blanchon 2014-2015
-// MIT License
-//
-// Arduino JSON library
-// https://github.com/bblanchon/ArduinoJson
-
-#include "../include/ArduinoJson/DynamicJsonBuffer.hpp"
-
-namespace ArduinoJson {
-namespace Internals {
-struct DynamicJsonBufferBlockWithoutData {
-  DynamicJsonBufferBlock* next;
-  size_t capacity;
-  size_t size;
-};
-
-
-struct DynamicJsonBufferBlock : DynamicJsonBufferBlockWithoutData {
-  uint8_t data[1];
-};
-}
-}
-
-using namespace ArduinoJson;
-using namespace ArduinoJson::Internals;
-
-DynamicJsonBuffer::DynamicJsonBuffer() {
-  _head = createBlock(FIRST_BLOCK_CAPACITY);
-}
-
-DynamicJsonBuffer::~DynamicJsonBuffer() {
-  Block* currentBlock = _head;
-
-  while (currentBlock != NULL) {
-    Block* nextBlock = currentBlock->next;
-    free(currentBlock);
-    currentBlock = nextBlock;
-  }
-}
-
-size_t DynamicJsonBuffer::size() const {
-  size_t total = 0;
-
-  for (const Block* b = _head; b != NULL; b = b->next) {
-    total += b->size;
-  }
-
-  return total;
-}
-
-void* DynamicJsonBuffer::alloc(size_t bytes) {
-  if (!canAllocInHead(bytes)) addNewBlock();
-  return allocInHead(bytes);
-}
-
-bool DynamicJsonBuffer::canAllocInHead(size_t bytes) const {
-  return _head->size + bytes <= _head->capacity;
-}
-
-void* DynamicJsonBuffer::allocInHead(size_t bytes) {
-  void* p = _head->data + _head->size;
-  _head->size += bytes;
-  return p;
-}
-
-void DynamicJsonBuffer::addNewBlock() {
-  Block* block = createBlock(_head->capacity * 2);
-  block->next = _head;
-  _head = block;
-}
-
-DynamicJsonBuffer::Block* DynamicJsonBuffer::createBlock(size_t capacity) {
-  size_t blkSize = sizeof(DynamicJsonBufferBlockWithoutData) + capacity;
-  Block* block = static_cast<Block*>(malloc(blkSize));
-  block->capacity = capacity;
-  block->size = 0;
-  block->next = NULL;
-  return block;
-}