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49 lines
1.7 KiB
49 lines
1.7 KiB
// |
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// Copyright (c) 2010 Michael Smith. All rights reserved. |
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// |
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// This is free software; you can redistribute it and/or modify it under |
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// the terms of the GNU Lesser General Public License as published by the |
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// Free Software Foundation; either version 2.1 of the License, or (at |
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// your option) any later version. |
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// |
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#ifndef __AP_HAL_UTILITY_BETTERSTREAM_H__ |
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#define __AP_HAL_UTILITY_BETTERSTREAM_H__ |
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#include <stdarg.h> |
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#include "../AP_HAL_Namespace.h" |
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#include "Stream.h" |
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/* prog_char_t: */ |
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#include <AP_Progmem.h> |
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/* AP_HAL::BetterStream is a pure virtual interface. It resembles |
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* Michael Smith's BetterStream library for Arduino. |
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* The Michael Smith BetterStream provided some implementations for AVR based |
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* on _vprintf(). |
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* Please provide your own platform-specic implementation of vprintf, sprintf, |
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* etc. to implement the printf functions. |
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* |
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* TODO: Segregate prog_char_t dependent functions to be available on AVR |
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* platform only, with default implementations elsewhere. |
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*/ |
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class AP_HAL::BetterStream : public AP_HAL::Stream { |
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public: |
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BetterStream(void) {} |
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virtual void print_P(const prog_char_t *) = 0; |
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virtual void println_P(const prog_char_t *) = 0; |
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virtual void printf(const char *, ...) |
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__attribute__ ((format(__printf__, 2, 3))) = 0; |
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/* No format checking on printf_P: can't currently support that on AVR */ |
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virtual void _printf_P(const prog_char *, ...) = 0; |
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#define printf_P(fmt, ...) _printf_P((const prog_char *)fmt, ## __VA_ARGS__) |
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virtual void vprintf(const char *, va_list) = 0; |
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virtual void vprintf_P(const prog_char *, va_list) = 0; |
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}; |
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#endif // __AP_HAL_UTILITY_BETTERSTREAM_H__ |
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