api_buffer.h

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#pragma once
 
#include <cstdint>
#include <cstring>
#include <memory>
 
#include "esphome/core/defines.h"
#include "esphome/core/helpers.h"
 
namespace esphome::api {
 
class APIBuffer {
 public:
  void clear() { this->size_ = 0; }
  [[nodiscard]] inline bool reserve(size_t n) ESPHOME_ALWAYS_INLINE { return n <= this->capacity_ || this->grow_(n); }
  [[nodiscard]] inline bool resize(size_t n) ESPHOME_ALWAYS_INLINE { return this->reserve_and_resize(n, n); }
  [[nodiscard]] inline bool reserve_and_resize(size_t reserve_size, size_t new_size) ESPHOME_ALWAYS_INLINE {
    if (!this->reserve(std::max(reserve_size, new_size)))
      return false;
    this->size_ = new_size;
    return true;
  }
  uint8_t *data() { return this->data_.get(); }
  const uint8_t *data() const { return this->data_.get(); }
  size_t size() const { return this->size_; }
  size_t capacity() const { return this->capacity_; }
  bool empty() const { return this->size_ == 0; }
  uint8_t &operator[](size_t i) { return this->data_[i]; }
  const uint8_t &operator[](size_t i) const { return this->data_[i]; }
  void release() {
    this->data_.reset();
    this->size_ = 0;
    this->capacity_ = 0;
  }
 
 protected:
  bool grow_(size_t n);
  std::unique_ptr<uint8_t[]> data_;
  size_t size_{0};
  size_t capacity_{0};
};
 
}  // namespace esphome::api