65 lines
3.2 KiB
C
65 lines
3.2 KiB
C
/* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/** printing utilities to replace the large printf from the standard library (API)
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* @note use % as format specifier prefix, followed by + to enforce sign or 0x prefix, 0 followed by n for padding or forcing integer part of floating point number, . followed by n for number for fractional precision of floating point numbers, and format specifier
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* format specifier supported are:
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* - c for character
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* - s for string
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* - u for up to uint32_t unsigned integer
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* - U for uint64_t unsigned integer
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* - d for up to int32_t signed integer
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* - D for int64_t signed integer
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* - f for float and double floating point numbers
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* - x for up to uint32_t lower case hexadecimal
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* - X for uint64_t lower case hexadecimal
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* - h for up to uint32_t upper case hexadecimal
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* - H for uint64_t upper case hexadecimal
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* - b for up to uint32_t bits
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* - B for uint64_t bits
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* @file print.h
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* @author King Kévin <kingkevin@cuvoodoo.info>
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* @date 2017
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*/
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#pragma once
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extern uint8_t print_error; /**< flags to indicate which error(s) occurred within printf or snprintf */
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#define PRINT_ERROR_NONE 0 /**< no error occurred */
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#define PRINT_ERROR_MALFORMED 0x1 /**< input format string is malformed */
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#define PRINT_ERROR_UNSUPPORTED 0x2 /**< input format string is not supported */
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#define PRINT_ERROR_MAX 0x04 /**< maximum returned printed length reached but more has been printed */
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#define PRINT_ERROR_TRUNCATED 0x08 /**< output string size is not large enough to include complete printed string */
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/** print a single character on user output
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* @warning this must be implemented by the user (using the desired output interface)
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* @param[in] c character to be printed
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* @return number of characters printed
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**/
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size_t putc(char c);
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/** print format string on user output
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* @param[in] format format string to be printed
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* @param[in] ... arguments referenced by format string to be printed
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* @return number of characters printed
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**/
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size_t printf(const char* format, ...);
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/** print format string on string or user output
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* @param[out] str string to print format string on, or user output if str is set to NULL (str will always be terminated with a null character '\0')
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* @param[in,out] size size of string (writes at most size characters on str, including the termination null character '\0')
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* @param[in] format format string to be printed
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* @param[in] ... arguments referenced by format string to be printed
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* @return number of characters printed (a return value of size or more means that the output was truncated)
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**/
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size_t snprintf(char* str, size_t size, const char* format, ...);
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