string_printer.h

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#pragma once
 
#ifdef ARDUINO
#include <Print.h>
#endif
 
#include <stdarg.h>
#include <stdio.h>
 
#include <string>
 
namespace roo_display {
 
/// Prefer `roo_io::StringPrintf` in new code.
std::string StringPrintf(const char* format, ...);
 
/// Prefer `roo_io::StringVPrintf` in new code.
std::string StringVPrintf(const char* format, va_list arg);
 
#ifdef ARDUINO
/// Utility that formats into a `std::string` via `Print`.
class StringPrinter : public Print {
 public:
  const std::string& get() const& { return s_; }
  const std::string get() && { return std::move(s_); }
 
  size_t write(uint8_t c) override {
    s_.append((const char*)(&c));
    return 1;
  }
 
  size_t write(const uint8_t* buffer, size_t size) override {
    s_.append((const char*)buffer, size);
    return size;
  }
 
 private:
  std::string s_;
};
#endif
 
}  // namespace roo_display