1 /////////////////////////////////////////////////////////////////////////////// 2 // \author (c) Marco Paland (info@paland.com) 3 // 2014-2019, PALANDesign Hannover, Germany 4 // 5 // \license The MIT License (MIT) 6 // 7 // Permission is hereby granted, free of charge, to any person obtaining a copy 8 // of this software and associated documentation files (the "Software"), to deal 9 // in the Software without restriction, including without limitation the rights 10 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 // copies of the Software, and to permit persons to whom the Software is 12 // furnished to do so, subject to the following conditions: 13 // 14 // The above copyright notice and this permission notice shall be included in 15 // all copies or substantial portions of the Software. 16 // 17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 // THE SOFTWARE. 24 // 25 // \brief Tiny printf, sprintf and snprintf implementation, optimized for speed on 26 // embedded systems with a very limited resources. 27 // Use this instead of bloated standard/newlib printf. 28 // These routines are thread safe and reentrant. 29 // 30 /////////////////////////////////////////////////////////////////////////////// 31 32 /*Original repository: https://github.com/mpaland/printf*/ 33 34 #ifndef _LV_PRINTF_H_ 35 #define _LV_PRINTF_H_ 36 37 #if defined(__has_include) 38 #if __has_include(<inttypes.h>) 39 #include <inttypes.h> 40 /* platform-specific printf format for int32_t, usually "d" or "ld" */ 41 #define LV_PRId32 PRId32 42 #define LV_PRIu32 PRIu32 43 #else 44 #define LV_PRId32 "d" 45 #define LV_PRIu32 "u" 46 #endif 47 #else 48 /* hope this is correct for ports without __has_include or without inttypes.h */ 49 #define LV_PRId32 "d" 50 #define LV_PRIu32 "u" 51 #endif 52 53 #ifdef __cplusplus 54 extern "C" { 55 #endif 56 57 #include "../lv_conf_internal.h" 58 59 #if LV_SPRINTF_CUSTOM == 0 60 61 #include <stdarg.h> 62 #include <stddef.h> 63 64 #include "lv_types.h" 65 66 typedef struct { 67 const char * fmt; 68 va_list * va; 69 } lv_vaformat_t; 70 71 /** 72 * Tiny snprintf/vsnprintf implementation 73 * \param buffer A pointer to the buffer where to store the formatted string 74 * \param count The maximum number of characters to store in the buffer, including a terminating null character 75 * \param format A string that specifies the format of the output 76 * \param va A value identifying a variable arguments list 77 * \return The number of characters that COULD have been written into the buffer, not counting the terminating 78 * null character. A value equal or larger than count indicates truncation. Only when the returned value 79 * is non-negative and less than count, the string has been completely written. 80 */ 81 int lv_snprintf(char * buffer, size_t count, const char * format, ...) LV_FORMAT_ATTRIBUTE(3, 4); 82 int lv_vsnprintf(char * buffer, size_t count, const char * format, va_list va) LV_FORMAT_ATTRIBUTE(3, 0); 83 84 #else 85 #include LV_SPRINTF_INCLUDE 86 #endif 87 88 #ifdef __cplusplus 89 } /*extern "C"*/ 90 #endif 91 92 #endif // _LV_PRINTF_H_ 93
