93 lines
3.4 KiB
C
93 lines
3.4 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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// \author (c) Marco Paland (info@paland.com)
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// 2014-2019, PALANDesign Hannover, Germany
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//
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// \license The MIT License (MIT)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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// \brief Tiny printf, sprintf and snprintf implementation, optimized for speed on
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// embedded systems with a very limited resources.
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// Use this instead of bloated standard/newlib printf.
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// These routines are thread safe and reentrant.
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//
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///////////////////////////////////////////////////////////////////////////////
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/*Original repository: https://github.com/mpaland/printf*/
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#ifndef _LV_PRINTF_H_
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#define _LV_PRINTF_H_
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#if defined(__has_include)
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#if __has_include(<inttypes.h>)
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#include <inttypes.h>
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/* platform-specific printf format for int32_t, usually "d" or "ld" */
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#define LV_PRId32 PRId32
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#define LV_PRIu32 PRIu32
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#else
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#define LV_PRId32 "d"
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#define LV_PRIu32 "u"
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#endif
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#else
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/* hope this is correct for ports without __has_include or without inttypes.h */
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#define LV_PRId32 "d"
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#define LV_PRIu32 "u"
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "../lv_conf_internal.h"
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#if LV_SPRINTF_CUSTOM == 0
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#include <stdarg.h>
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#include <stddef.h>
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#include "lv_types.h"
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typedef struct {
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const char * fmt;
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va_list * va;
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} lv_vaformat_t;
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/**
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* Tiny snprintf/vsnprintf implementation
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* \param buffer A pointer to the buffer where to store the formatted string
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* \param count The maximum number of characters to store in the buffer, including a terminating null character
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* \param format A string that specifies the format of the output
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* \param va A value identifying a variable arguments list
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* \return The number of characters that COULD have been written into the buffer, not counting the terminating
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* null character. A value equal or larger than count indicates truncation. Only when the returned value
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* is non-negative and less than count, the string has been completely written.
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*/
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int lv_snprintf(char * buffer, size_t count, const char * format, ...) LV_FORMAT_ATTRIBUTE(3, 4);
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int lv_vsnprintf(char * buffer, size_t count, const char * format, va_list va) LV_FORMAT_ATTRIBUTE(3, 0);
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#else
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#include LV_SPRINTF_INCLUDE
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#endif
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#ifdef __cplusplus
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} /*extern "C"*/
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#endif
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#endif // _LV_PRINTF_H_
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