acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
lv_printf.h (3449B)
      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_