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59 lines
1.2 KiB
59 lines
1.2 KiB
/*
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Arduino Print buffer. Size is fixed, unlike StreamString.
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Copyright (C) 2020 by Maxim Prokhorov <prokhorov dot max at outlook dot com>
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*/
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#pragma once
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#include <Arduino.h>
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#include <Print.h>
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#include <core_version.h>
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struct PrintString final : public Print, public String {
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PrintString(size_t reserved) :
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_reserved(reserved)
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{
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reserve(reserved);
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}
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size_t write(const uint8_t* data, size_t size) override {
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if (!size || !data) return 0;
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// we *will* receive C-strings as input
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size_t want = length() + size;
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if (data[size - 1] == '\0') {
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size -= 1;
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want -= 1;
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}
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if (want > _reserved) return 0;
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// XXX: 2.3.0 uses str... methods that expect '0' at the end of the 'data'
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// see WString{.cpp,.h} for the implementation
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#if defined(ARDUINO_ESP8266_RELEASE_2_3_0)
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std::copy(data, data + size, buffer + len);
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len = want;
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buffer[len] = '\0';
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#else
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concat(reinterpret_cast<const char*>(data), size);
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#endif
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return size;
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}
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size_t write(uint8_t ch) override {
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if (length() + 1 > _reserved) return 0;
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return concat(static_cast<char>(ch));
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}
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private:
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const size_t _reserved;
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};
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