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987 lines
29 KiB
987 lines
29 KiB
///////////////////////////////////////////////////////////////////////////////
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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 (v)snprintf implementation, optimized for speed on
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// embedded systems with a very limited resources. These routines are thread
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// safe and reentrant!
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// Use this instead of the bloated standard/newlib printf cause these use
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// malloc for printf (and may not be thread safe).
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//
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///////////////////////////////////////////////////////////////////////////////
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#include <stdbool.h>
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#include <stdint.h>
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#include "printf.h"
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// define this globally (e.g. gcc -DPRINTF_INCLUDE_CONFIG_H ...) to include the
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// printf_config.h header file
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// default: undefined
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#ifdef PRINTF_INCLUDE_CONFIG_H
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#include "printf_config.h"
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#endif
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// 'ntoa' conversion buffer size, this must be big enough to hold one converted
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// numeric number including padded zeros (dynamically created on stack)
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// default: 32 byte
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#ifndef PRINTF_NTOA_BUFFER_SIZE
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#define PRINTF_NTOA_BUFFER_SIZE 32U
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#endif
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// 'ftoa' conversion buffer size, this must be big enough to hold one converted
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// float number including padded zeros (dynamically created on stack)
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// default: 32 byte
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#ifndef PRINTF_FTOA_BUFFER_SIZE
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#define PRINTF_FTOA_BUFFER_SIZE 32U
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#endif
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// support for the floating point type (%f)
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// default: activated
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// #ifndef PRINTF_DISABLE_SUPPORT_FLOAT
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// #define PRINTF_SUPPORT_FLOAT
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// #endif
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// support for exponential floating point notation (%e/%g)
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// default: activated
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// #ifndef PRINTF_DISABLE_SUPPORT_EXPONENTIAL
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// #define PRINTF_SUPPORT_EXPONENTIAL
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// #endif
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// define the default floating point precision
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// default: 6 digits
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// #ifndef PRINTF_DEFAULT_FLOAT_PRECISION
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// #define PRINTF_DEFAULT_FLOAT_PRECISION 6U
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// #endif
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// define the largest float suitable to print with %f
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// default: 1e9
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// #ifndef PRINTF_MAX_FLOAT
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// #define PRINTF_MAX_FLOAT 1e9
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// #endif
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// support for the long long types (%llu or %p)
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// default: activated
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#ifndef PRINTF_DISABLE_SUPPORT_LONG_LONG
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#define PRINTF_SUPPORT_LONG_LONG
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#endif
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// support for the ptrdiff_t type (%t)
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// ptrdiff_t is normally defined in <stddef.h> as long or long long type
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// default: activated
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// #ifndef PRINTF_DISABLE_SUPPORT_PTRDIFF_T
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// #define PRINTF_SUPPORT_PTRDIFF_T
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// #endif
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///////////////////////////////////////////////////////////////////////////////
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// internal flag definitions
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#define FLAGS_ZEROPAD (1U << 0U)
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#define FLAGS_LEFT (1U << 1U)
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#define FLAGS_PLUS (1U << 2U)
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#define FLAGS_SPACE (1U << 3U)
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#define FLAGS_HASH (1U << 4U)
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#define FLAGS_UPPERCASE (1U << 5U)
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#define FLAGS_CHAR (1U << 6U)
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#define FLAGS_SHORT (1U << 7U)
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#define FLAGS_LONG (1U << 8U)
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#define FLAGS_LONG_LONG (1U << 9U)
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#define FLAGS_PRECISION (1U << 10U)
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#define FLAGS_ADAPT_EXP (1U << 11U)
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// import float.h for DBL_MAX
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// #if defined(PRINTF_SUPPORT_FLOAT)
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// #include <float.h>
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// #endif
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// output function type
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typedef void (*out_fct_type)(char character, void* buffer, size_t idx, size_t maxlen);
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// wrapper (used as buffer) for output function type
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typedef struct {
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void (*fct)(char character, void* arg);
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void* arg;
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} out_fct_wrap_type;
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// Sometimes div modulo is not available, we implement one with shift/and/or
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static int divmod(int* Qptr, int* Rptr, const int N, const int D) {
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if (D == 0) {
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return -1;
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}
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int Q = 0;
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int R = 0;
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for (int i = 8*sizeof(int) - 1; i >= 0; i--) {
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R <<= 1;
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R |= (N >> i) & 0x1;
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if (R >= D) {
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R -= D;
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Q |= 1 << i;
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}
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}
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*Qptr = Q;
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*Rptr = R;
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return 0;
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}
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// Sometimes div modulo is not available, we implement one with shift/and/or
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static int divmod_long_long(long long* Qptr, long long* Rptr, const long long N, const int D) {
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if (D == 0) {
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return -1;
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}
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long long Q = 0;
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long long R = 0;
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for (long long i = 8*sizeof(long long) - 1; i >= 0; i--) {
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R <<= 1;
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R |= (N >> i) & 0x1;
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if (R >= D) {
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R -= D;
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Q |= 1 << i;
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}
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}
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*Qptr = Q;
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*Rptr = R;
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return 0;
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}
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// internal buffer output
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static inline void _out_buffer(char character, void* buffer, size_t idx, size_t maxlen)
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{
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if (idx < maxlen) {
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((char*)buffer)[idx] = character;
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}
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}
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// internal null output
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static inline void _out_null(char character, void* buffer, size_t idx, size_t maxlen)
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{
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(void)character; (void)buffer; (void)idx; (void)maxlen;
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}
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// internal _putchar wrapper
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static inline void _out_char(char character, void* buffer, size_t idx, size_t maxlen)
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{
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(void)buffer; (void)idx; (void)maxlen;
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if (character) {
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_putchar(character);
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}
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}
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// internal output function wrapper
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static inline void _out_fct(char character, void* buffer, size_t idx, size_t maxlen)
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{
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(void)idx; (void)maxlen;
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if (character) {
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// buffer is the output fct pointer
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((out_fct_wrap_type*)buffer)->fct(character, ((out_fct_wrap_type*)buffer)->arg);
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}
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}
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// internal secure strlen
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// \return The length of the string (excluding the terminating 0) limited by 'maxsize'
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static inline unsigned int _strnlen_s(const char* str, size_t maxsize)
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{
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const char* s;
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for (s = str; *s && maxsize--; ++s);
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return (unsigned int)(s - str);
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}
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// internal test if char is a digit (0-9)
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// \return true if char is a digit
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static inline bool _is_digit(char ch)
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{
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return (ch >= '0') && (ch <= '9');
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}
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// internal ASCII string to unsigned int conversion
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static unsigned int _atoi(const char** str)
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{
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unsigned int i = 0U;
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while (_is_digit(**str)) {
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i = i * 10U + (unsigned int)(*((*str)++) - '0');
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}
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return i;
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}
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// output the specified string in reverse, taking care of any zero-padding
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static size_t _out_rev(out_fct_type out, char* buffer, size_t idx, size_t maxlen, const char* buf, size_t len, unsigned int width, unsigned int flags)
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{
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const size_t start_idx = idx;
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// pad spaces up to given width
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if (!(flags & FLAGS_LEFT) && !(flags & FLAGS_ZEROPAD)) {
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for (size_t i = len; i < width; i++) {
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out(' ', buffer, idx++, maxlen);
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}
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}
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// reverse string
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while (len) {
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out(buf[--len], buffer, idx++, maxlen);
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}
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// append pad spaces up to given width
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if (flags & FLAGS_LEFT) {
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while (idx - start_idx < width) {
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out(' ', buffer, idx++, maxlen);
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}
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}
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return idx;
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}
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// internal itoa format
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static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t maxlen, char* buf, size_t len, bool negative, unsigned int base, unsigned int prec, unsigned int width, unsigned int flags)
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{
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// pad leading zeros
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if (!(flags & FLAGS_LEFT)) {
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if (width && (flags & FLAGS_ZEROPAD) && (negative || (flags & (FLAGS_PLUS | FLAGS_SPACE)))) {
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width--;
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}
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while ((len < prec) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
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buf[len++] = '0';
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}
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while ((flags & FLAGS_ZEROPAD) && (len < width) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
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buf[len++] = '0';
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}
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}
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// handle hash
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if (flags & FLAGS_HASH) {
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if (!(flags & FLAGS_PRECISION) && len && ((len == prec) || (len == width))) {
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len--;
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if (len && (base == 16U)) {
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len--;
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}
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}
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if ((base == 16U) && !(flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
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buf[len++] = 'x';
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}
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else if ((base == 16U) && (flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
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buf[len++] = 'X';
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}
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else if ((base == 2U) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
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buf[len++] = 'b';
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}
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if (len < PRINTF_NTOA_BUFFER_SIZE) {
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buf[len++] = '0';
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}
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}
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if (len < PRINTF_NTOA_BUFFER_SIZE) {
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if (negative) {
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buf[len++] = '-';
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}
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else if (flags & FLAGS_PLUS) {
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buf[len++] = '+'; // ignore the space if the '+' exists
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}
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else if (flags & FLAGS_SPACE) {
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buf[len++] = ' ';
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}
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}
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return _out_rev(out, buffer, idx, maxlen, buf, len, width, flags);
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}
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// internal itoa for 'long' type
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static size_t _ntoa_long(out_fct_type out, char* buffer, size_t idx, size_t maxlen, unsigned long value, bool negative, unsigned long base, unsigned int prec, unsigned int width, unsigned int flags)
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{
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char buf[PRINTF_NTOA_BUFFER_SIZE];
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size_t len = 0U;
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int q, r;
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// no hash for 0 values
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if (!value) {
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flags &= ~FLAGS_HASH;
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}
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// write if precision != 0 and value is != 0
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if (!(flags & FLAGS_PRECISION) || value) {
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q = 0, r = 0;
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len = 0;
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do {
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divmod(&q, &r, value, base);
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const char digit = (char)(r);
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// buf[idx2++] = '0' + digit;
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buf[len++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10;
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value = q;
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} while (value && (len < PRINTF_NTOA_BUFFER_SIZE));
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// while (idx2 > 0) {
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// _putchar(buf[--idx2]);
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// written++;
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// }
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// idx++;
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// do {
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// const char digit = (char)(value % base);
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// buf[len++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10;
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// value /= base;
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// } while (value && (len < PRINTF_NTOA_BUFFER_SIZE));
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}
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return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int)base, prec, width, flags);
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}
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// // internal itoa for 'long long' type
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#if defined(PRINTF_SUPPORT_LONG_LONG)
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static size_t _ntoa_long_long(out_fct_type out, char* buffer, size_t idx, size_t maxlen, unsigned long long value, bool negative, unsigned long long base, unsigned int prec, unsigned int width, unsigned int flags)
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{
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char buf[PRINTF_NTOA_BUFFER_SIZE];
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size_t len = 0U;
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long long q, r;
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// no hash for 0 values
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if (!value) {
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flags &= ~FLAGS_HASH;
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}
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// write if precision != 0 and value is != 0
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if (!(flags & FLAGS_PRECISION) || value) {
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q = 0, r = 0;
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len = 0;
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do {
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divmod_long_long(&q, &r, value, base);
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const char digit = (char)(r);
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// buf[idx2++] = '0' + digit;
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buf[len++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10;
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value = q;
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} while (value && (len < PRINTF_NTOA_BUFFER_SIZE));
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// do {
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// const char digit = (char)(value % base);
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// buf[len++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10;
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// value /= base;
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// } while (value && (len < PRINTF_NTOA_BUFFER_SIZE));
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}
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return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int)base, prec, width, flags);
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}
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#endif // PRINTF_SUPPORT_LONG_LONG
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// #if defined(PRINTF_SUPPORT_FLOAT)
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//
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// #if defined(PRINTF_SUPPORT_EXPONENTIAL)
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// // forward declaration so that _ftoa can switch to exp notation for values > PRINTF_MAX_FLOAT
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// static size_t _etoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags);
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// #endif
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//
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//
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// // internal ftoa for fixed decimal floating point
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// static size_t _ftoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags)
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// {
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// char buf[PRINTF_FTOA_BUFFER_SIZE];
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// size_t len = 0U;
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// double diff = 0.0;
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//
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// // powers of 10
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// static const double pow10[] = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000 };
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//
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// // test for special values
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// if (value != value)
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// return _out_rev(out, buffer, idx, maxlen, "nan", 3, width, flags);
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// if (value < -DBL_MAX)
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// return _out_rev(out, buffer, idx, maxlen, "fni-", 4, width, flags);
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// if (value > DBL_MAX)
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// return _out_rev(out, buffer, idx, maxlen, (flags & FLAGS_PLUS) ? "fni+" : "fni", (flags & FLAGS_PLUS) ? 4U : 3U, width, flags);
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//
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// // test for very large values
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// // standard printf behavior is to print EVERY whole number digit -- which could be 100s of characters overflowing your buffers == bad
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// if ((value > PRINTF_MAX_FLOAT) || (value < -PRINTF_MAX_FLOAT)) {
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// #if defined(PRINTF_SUPPORT_EXPONENTIAL)
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// return _etoa(out, buffer, idx, maxlen, value, prec, width, flags);
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// #else
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// return 0U;
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// #endif
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// }
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//
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// // test for negative
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// bool negative = false;
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// if (value < 0) {
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// negative = true;
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// value = 0 - value;
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// }
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//
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// // set default precision, if not set explicitly
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// if (!(flags & FLAGS_PRECISION)) {
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// prec = PRINTF_DEFAULT_FLOAT_PRECISION;
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// }
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// // limit precision to 9, cause a prec >= 10 can lead to overflow errors
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// while ((len < PRINTF_FTOA_BUFFER_SIZE) && (prec > 9U)) {
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// buf[len++] = '0';
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// prec--;
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// }
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//
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// int whole = (int)value;
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// double tmp = (value - whole) * pow10[prec];
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// unsigned long frac = (unsigned long)tmp;
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// diff = tmp - frac;
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//
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// if (diff > 0.5) {
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// ++frac;
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// // handle rollover, e.g. case 0.99 with prec 1 is 1.0
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// if (frac >= pow10[prec]) {
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// frac = 0;
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// ++whole;
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// }
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// }
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// else if (diff < 0.5) {
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// }
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// else if ((frac == 0U) || (frac & 1U)) {
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// // if halfway, round up if odd OR if last digit is 0
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// ++frac;
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// }
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//
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// if (prec == 0U) {
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// diff = value - (double)whole;
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// if ((!(diff < 0.5) || (diff > 0.5)) && (whole & 1)) {
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// // exactly 0.5 and ODD, then round up
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// // 1.5 -> 2, but 2.5 -> 2
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// ++whole;
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// }
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// }
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// else {
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// unsigned int count = prec;
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// // now do fractional part, as an unsigned number
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// while (len < PRINTF_FTOA_BUFFER_SIZE) {
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// --count;
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// buf[len++] = (char)(48U + (frac % 10U));
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// if (!(frac /= 10U)) {
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// break;
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// }
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// }
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// // add extra 0s
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// while ((len < PRINTF_FTOA_BUFFER_SIZE) && (count-- > 0U)) {
|
|
// buf[len++] = '0';
|
|
// }
|
|
// if (len < PRINTF_FTOA_BUFFER_SIZE) {
|
|
// // add decimal
|
|
// buf[len++] = '.';
|
|
// }
|
|
// }
|
|
//
|
|
// // do whole part, number is reversed
|
|
// while (len < PRINTF_FTOA_BUFFER_SIZE) {
|
|
// buf[len++] = (char)(48 + (whole % 10));
|
|
// if (!(whole /= 10)) {
|
|
// break;
|
|
// }
|
|
// }
|
|
//
|
|
// // pad leading zeros
|
|
// if (!(flags & FLAGS_LEFT) && (flags & FLAGS_ZEROPAD)) {
|
|
// if (width && (negative || (flags & (FLAGS_PLUS | FLAGS_SPACE)))) {
|
|
// width--;
|
|
// }
|
|
// while ((len < width) && (len < PRINTF_FTOA_BUFFER_SIZE)) {
|
|
// buf[len++] = '0';
|
|
// }
|
|
// }
|
|
//
|
|
// if (len < PRINTF_FTOA_BUFFER_SIZE) {
|
|
// if (negative) {
|
|
// buf[len++] = '-';
|
|
// }
|
|
// else if (flags & FLAGS_PLUS) {
|
|
// buf[len++] = '+'; // ignore the space if the '+' exists
|
|
// }
|
|
// else if (flags & FLAGS_SPACE) {
|
|
// buf[len++] = ' ';
|
|
// }
|
|
// }
|
|
//
|
|
// return _out_rev(out, buffer, idx, maxlen, buf, len, width, flags);
|
|
// }
|
|
//
|
|
//
|
|
// #if defined(PRINTF_SUPPORT_EXPONENTIAL)
|
|
// // internal ftoa variant for exponential floating-point type, contributed by Martijn Jasperse <m.jasperse@gmail.com>
|
|
// static size_t _etoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags)
|
|
// {
|
|
// // check for NaN and special values
|
|
// if ((value != value) || (value > DBL_MAX) || (value < -DBL_MAX)) {
|
|
// return _ftoa(out, buffer, idx, maxlen, value, prec, width, flags);
|
|
// }
|
|
//
|
|
// // determine the sign
|
|
// const bool negative = value < 0;
|
|
// if (negative) {
|
|
// value = -value;
|
|
// }
|
|
//
|
|
// // default precision
|
|
// if (!(flags & FLAGS_PRECISION)) {
|
|
// prec = PRINTF_DEFAULT_FLOAT_PRECISION;
|
|
// }
|
|
//
|
|
// // determine the decimal exponent
|
|
// // based on the algorithm by David Gay (https://www.ampl.com/netlib/fp/dtoa.c)
|
|
// union {
|
|
// uint64_t U;
|
|
// double F;
|
|
// } conv;
|
|
//
|
|
// conv.F = value;
|
|
// int exp2 = (int)((conv.U >> 52U) & 0x07FFU) - 1023; // effectively log2
|
|
// conv.U = (conv.U & ((1ULL << 52U) - 1U)) | (1023ULL << 52U); // drop the exponent so conv.F is now in [1,2)
|
|
// // now approximate log10 from the log2 integer part and an expansion of ln around 1.5
|
|
// int expval = (int)(0.1760912590558 + exp2 * 0.301029995663981 + (conv.F - 1.5) * 0.289529654602168);
|
|
// // now we want to compute 10^expval but we want to be sure it won't overflow
|
|
// exp2 = (int)(expval * 3.321928094887362 + 0.5);
|
|
// const double z = expval * 2.302585092994046 - exp2 * 0.6931471805599453;
|
|
// const double z2 = z * z;
|
|
// conv.U = (uint64_t)(exp2 + 1023) << 52U;
|
|
// // compute exp(z) using continued fractions, see https://en.wikipedia.org/wiki/Exponential_function#Continued_fractions_for_ex
|
|
// conv.F *= 1 + 2 * z / (2 - z + (z2 / (6 + (z2 / (10 + z2 / 14)))));
|
|
// // correct for rounding errors
|
|
// if (value < conv.F) {
|
|
// expval--;
|
|
// conv.F /= 10;
|
|
// }
|
|
//
|
|
// // the exponent format is "%+03d" and largest value is "307", so set aside 4-5 characters
|
|
// unsigned int minwidth = ((expval < 100) && (expval > -100)) ? 4U : 5U;
|
|
//
|
|
// // in "%g" mode, "prec" is the number of *significant figures* not decimals
|
|
// if (flags & FLAGS_ADAPT_EXP) {
|
|
// // do we want to fall-back to "%f" mode?
|
|
// if ((value >= 1e-4) && (value < 1e6)) {
|
|
// if ((int)prec > expval) {
|
|
// prec = (unsigned)((int)prec - expval - 1);
|
|
// }
|
|
// else {
|
|
// prec = 0;
|
|
// }
|
|
// flags |= FLAGS_PRECISION; // make sure _ftoa respects precision
|
|
// // no characters in exponent
|
|
// minwidth = 0U;
|
|
// expval = 0;
|
|
// }
|
|
// else {
|
|
// // we use one sigfig for the whole part
|
|
// if ((prec > 0) && (flags & FLAGS_PRECISION)) {
|
|
// --prec;
|
|
// }
|
|
// }
|
|
// }
|
|
//
|
|
// // will everything fit?
|
|
// unsigned int fwidth = width;
|
|
// if (width > minwidth) {
|
|
// // we didn't fall-back so subtract the characters required for the exponent
|
|
// fwidth -= minwidth;
|
|
// } else {
|
|
// // not enough characters, so go back to default sizing
|
|
// fwidth = 0U;
|
|
// }
|
|
// if ((flags & FLAGS_LEFT) && minwidth) {
|
|
// // if we're padding on the right, DON'T pad the floating part
|
|
// fwidth = 0U;
|
|
// }
|
|
//
|
|
// // rescale the float value
|
|
// if (expval) {
|
|
// value /= conv.F;
|
|
// }
|
|
//
|
|
// // output the floating part
|
|
// const size_t start_idx = idx;
|
|
// idx = _ftoa(out, buffer, idx, maxlen, negative ? -value : value, prec, fwidth, flags & ~FLAGS_ADAPT_EXP);
|
|
//
|
|
// // output the exponent part
|
|
// if (minwidth) {
|
|
// // output the exponential symbol
|
|
// out((flags & FLAGS_UPPERCASE) ? 'E' : 'e', buffer, idx++, maxlen);
|
|
// // output the exponent value
|
|
// idx = _ntoa_long(out, buffer, idx, maxlen, (expval < 0) ? -expval : expval, expval < 0, 10, 0, minwidth-1, FLAGS_ZEROPAD | FLAGS_PLUS);
|
|
// // might need to right-pad spaces
|
|
// if (flags & FLAGS_LEFT) {
|
|
// while (idx - start_idx < width) out(' ', buffer, idx++, maxlen);
|
|
// }
|
|
// }
|
|
// return idx;
|
|
// }
|
|
// #endif // PRINTF_SUPPORT_EXPONENTIAL
|
|
// #endif // PRINTF_SUPPORT_FLOAT
|
|
|
|
|
|
// internal vsnprintf
|
|
static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const char* format, va_list va)
|
|
{
|
|
unsigned int flags, width, precision, n;
|
|
size_t idx = 0U;
|
|
|
|
if (!buffer) {
|
|
// use null output function
|
|
out = _out_null;
|
|
}
|
|
|
|
while (*format)
|
|
{
|
|
// format specifier? %[flags][width][.precision][length]
|
|
if (*format != '%') {
|
|
// no
|
|
out(*format, buffer, idx++, maxlen);
|
|
format++;
|
|
continue;
|
|
}
|
|
else {
|
|
// yes, evaluate it
|
|
format++;
|
|
}
|
|
|
|
// evaluate flags
|
|
flags = 0U;
|
|
do {
|
|
switch (*format) {
|
|
case '0': flags |= FLAGS_ZEROPAD; format++; n = 1U; break;
|
|
case '-': flags |= FLAGS_LEFT; format++; n = 1U; break;
|
|
case '+': flags |= FLAGS_PLUS; format++; n = 1U; break;
|
|
case ' ': flags |= FLAGS_SPACE; format++; n = 1U; break;
|
|
case '#': flags |= FLAGS_HASH; format++; n = 1U; break;
|
|
default : n = 0U; break;
|
|
}
|
|
} while (n);
|
|
|
|
// evaluate width field
|
|
width = 0U;
|
|
if (_is_digit(*format)) {
|
|
width = _atoi(&format);
|
|
}
|
|
else if (*format == '*') {
|
|
const int w = va_arg(va, int);
|
|
if (w < 0) {
|
|
flags |= FLAGS_LEFT; // reverse padding
|
|
width = (unsigned int)-w;
|
|
}
|
|
else {
|
|
width = (unsigned int)w;
|
|
}
|
|
format++;
|
|
}
|
|
|
|
// evaluate precision field
|
|
precision = 0U;
|
|
if (*format == '.') {
|
|
flags |= FLAGS_PRECISION;
|
|
format++;
|
|
if (_is_digit(*format)) {
|
|
precision = _atoi(&format);
|
|
}
|
|
else if (*format == '*') {
|
|
const int prec = (int)va_arg(va, int);
|
|
precision = prec > 0 ? (unsigned int)prec : 0U;
|
|
format++;
|
|
}
|
|
}
|
|
|
|
// evaluate length field
|
|
switch (*format) {
|
|
case 'l' :
|
|
flags |= FLAGS_LONG;
|
|
format++;
|
|
if (*format == 'l') {
|
|
flags |= FLAGS_LONG_LONG;
|
|
format++;
|
|
}
|
|
break;
|
|
case 'h' :
|
|
flags |= FLAGS_SHORT;
|
|
format++;
|
|
if (*format == 'h') {
|
|
flags |= FLAGS_CHAR;
|
|
format++;
|
|
}
|
|
break;
|
|
// #if defined(PRINTF_SUPPORT_PTRDIFF_T)
|
|
// case 't' :
|
|
// flags |= (sizeof(ptrdiff_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG);
|
|
// format++;
|
|
// break;
|
|
// #endif
|
|
case 'j' :
|
|
flags |= (sizeof(intmax_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG);
|
|
format++;
|
|
break;
|
|
case 'z' :
|
|
flags |= (sizeof(size_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG);
|
|
format++;
|
|
break;
|
|
default :
|
|
break;
|
|
}
|
|
|
|
// evaluate specifier
|
|
switch (*format) {
|
|
case 'd' :
|
|
case 'i' :
|
|
case 'u' :
|
|
case 'x' :
|
|
case 'X' :
|
|
case 'o' :
|
|
case 'b' : {
|
|
// set the base
|
|
unsigned int base;
|
|
if (*format == 'x' || *format == 'X') {
|
|
base = 16U;
|
|
}
|
|
else if (*format == 'o') {
|
|
base = 8U;
|
|
}
|
|
else if (*format == 'b') {
|
|
base = 2U;
|
|
}
|
|
else {
|
|
base = 10U;
|
|
flags &= ~FLAGS_HASH; // no hash for dec format
|
|
}
|
|
// uppercase
|
|
if (*format == 'X') {
|
|
flags |= FLAGS_UPPERCASE;
|
|
}
|
|
|
|
// no plus or space flag for u, x, X, o, b
|
|
if ((*format != 'i') && (*format != 'd')) {
|
|
flags &= ~(FLAGS_PLUS | FLAGS_SPACE);
|
|
}
|
|
|
|
// ignore '0' flag when precision is given
|
|
if (flags & FLAGS_PRECISION) {
|
|
flags &= ~FLAGS_ZEROPAD;
|
|
}
|
|
|
|
// convert the integer
|
|
if ((*format == 'i') || (*format == 'd')) {
|
|
// signed
|
|
if (flags & FLAGS_LONG_LONG) {
|
|
#if defined(PRINTF_SUPPORT_LONG_LONG)
|
|
const long long value = va_arg(va, long long);
|
|
idx = _ntoa_long_long(out, buffer, idx, maxlen, (unsigned long long)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags);
|
|
#endif
|
|
}
|
|
else if (flags & FLAGS_LONG) {
|
|
const long value = va_arg(va, long);
|
|
idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned long)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags);
|
|
}
|
|
else {
|
|
const int value = (flags & FLAGS_CHAR) ? (char)va_arg(va, int) : (flags & FLAGS_SHORT) ? (short int)va_arg(va, int) : va_arg(va, int);
|
|
idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned int)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags);
|
|
}
|
|
}
|
|
else {
|
|
// unsigned
|
|
if (flags & FLAGS_LONG_LONG) {
|
|
#if defined(PRINTF_SUPPORT_LONG_LONG)
|
|
idx = _ntoa_long_long(out, buffer, idx, maxlen, va_arg(va, unsigned long long), false, base, precision, width, flags);
|
|
#endif
|
|
}
|
|
else if (flags & FLAGS_LONG) {
|
|
idx = _ntoa_long(out, buffer, idx, maxlen, va_arg(va, unsigned long), false, base, precision, width, flags);
|
|
}
|
|
else {
|
|
const unsigned int value = (flags & FLAGS_CHAR) ? (unsigned char)va_arg(va, unsigned int) : (flags & FLAGS_SHORT) ? (unsigned short int)va_arg(va, unsigned int) : va_arg(va, unsigned int);
|
|
idx = _ntoa_long(out, buffer, idx, maxlen, value, false, base, precision, width, flags);
|
|
}
|
|
}
|
|
format++;
|
|
break;
|
|
}
|
|
// #if defined(PRINTF_SUPPORT_FLOAT)
|
|
// case 'f' :
|
|
// case 'F' :
|
|
// if (*format == 'F') flags |= FLAGS_UPPERCASE;
|
|
// idx = _ftoa(out, buffer, idx, maxlen, va_arg(va, double), precision, width, flags);
|
|
// format++;
|
|
// break;
|
|
// #if defined(PRINTF_SUPPORT_EXPONENTIAL)
|
|
// case 'e':
|
|
// case 'E':
|
|
// case 'g':
|
|
// case 'G':
|
|
// if ((*format == 'g')||(*format == 'G')) flags |= FLAGS_ADAPT_EXP;
|
|
// if ((*format == 'E')||(*format == 'G')) flags |= FLAGS_UPPERCASE;
|
|
// idx = _etoa(out, buffer, idx, maxlen, va_arg(va, double), precision, width, flags);
|
|
// format++;
|
|
// break;
|
|
// #endif // PRINTF_SUPPORT_EXPONENTIAL
|
|
// #endif // PRINTF_SUPPORT_FLOAT
|
|
case 'c' : {
|
|
unsigned int l = 1U;
|
|
// pre padding
|
|
if (!(flags & FLAGS_LEFT)) {
|
|
while (l++ < width) {
|
|
out(' ', buffer, idx++, maxlen);
|
|
}
|
|
}
|
|
// char output
|
|
out((char)va_arg(va, int), buffer, idx++, maxlen);
|
|
// post padding
|
|
if (flags & FLAGS_LEFT) {
|
|
while (l++ < width) {
|
|
out(' ', buffer, idx++, maxlen);
|
|
}
|
|
}
|
|
format++;
|
|
break;
|
|
}
|
|
|
|
case 's' : {
|
|
const char* p = va_arg(va, char*);
|
|
unsigned int l = _strnlen_s(p, precision ? precision : (size_t)-1);
|
|
// pre padding
|
|
if (flags & FLAGS_PRECISION) {
|
|
l = (l < precision ? l : precision);
|
|
}
|
|
if (!(flags & FLAGS_LEFT)) {
|
|
while (l++ < width) {
|
|
out(' ', buffer, idx++, maxlen);
|
|
}
|
|
}
|
|
// string output
|
|
while ((*p != 0) && (!(flags & FLAGS_PRECISION) || precision--)) {
|
|
out(*(p++), buffer, idx++, maxlen);
|
|
}
|
|
// post padding
|
|
if (flags & FLAGS_LEFT) {
|
|
while (l++ < width) {
|
|
out(' ', buffer, idx++, maxlen);
|
|
}
|
|
}
|
|
format++;
|
|
break;
|
|
}
|
|
|
|
case 'p' : {
|
|
width = sizeof(void*) * 2U;
|
|
flags |= FLAGS_ZEROPAD | FLAGS_UPPERCASE;
|
|
#if defined(PRINTF_SUPPORT_LONG_LONG)
|
|
const bool is_ll = sizeof(uintptr_t) == sizeof(long long);
|
|
if (is_ll) {
|
|
idx = _ntoa_long_long(out, buffer, idx, maxlen, (uintptr_t)va_arg(va, void*), false, 16U, precision, width, flags);
|
|
}
|
|
else {
|
|
#endif
|
|
idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned long)((uintptr_t)va_arg(va, void*)), false, 16U, precision, width, flags);
|
|
#if defined(PRINTF_SUPPORT_LONG_LONG)
|
|
}
|
|
#endif
|
|
format++;
|
|
break;
|
|
}
|
|
|
|
case '%' :
|
|
out('%', buffer, idx++, maxlen);
|
|
format++;
|
|
break;
|
|
|
|
default :
|
|
out(*format, buffer, idx++, maxlen);
|
|
format++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// termination
|
|
out((char)0, buffer, idx < maxlen ? idx : maxlen - 1U, maxlen);
|
|
|
|
// return written chars without terminating \0
|
|
return (int)idx;
|
|
}
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
int printf_(const char* format, ...)
|
|
{
|
|
va_list va;
|
|
va_start(va, format);
|
|
char buffer[1];
|
|
const int ret = _vsnprintf(_out_char, buffer, (size_t)-1, format, va);
|
|
va_end(va);
|
|
return ret;
|
|
}
|
|
|
|
|
|
int sprintf_(char* buffer, const char* format, ...)
|
|
{
|
|
va_list va;
|
|
va_start(va, format);
|
|
const int ret = _vsnprintf(_out_buffer, buffer, (size_t)-1, format, va);
|
|
va_end(va);
|
|
return ret;
|
|
}
|
|
|
|
|
|
int snprintf_(char* buffer, size_t count, const char* format, ...)
|
|
{
|
|
va_list va;
|
|
va_start(va, format);
|
|
const int ret = _vsnprintf(_out_buffer, buffer, count, format, va);
|
|
va_end(va);
|
|
return ret;
|
|
}
|
|
|
|
|
|
int vprintf_(const char* format, va_list va)
|
|
{
|
|
char buffer[1];
|
|
return _vsnprintf(_out_char, buffer, (size_t)-1, format, va);
|
|
}
|
|
|
|
|
|
int vsnprintf_(char* buffer, size_t count, const char* format, va_list va)
|
|
{
|
|
return _vsnprintf(_out_buffer, buffer, count, format, va);
|
|
}
|
|
|
|
|
|
int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...)
|
|
{
|
|
va_list va;
|
|
va_start(va, format);
|
|
const out_fct_wrap_type out_fct_wrap = { out, arg };
|
|
const int ret = _vsnprintf(_out_fct, (char*)(uintptr_t)&out_fct_wrap, (size_t)-1, format, va);
|
|
va_end(va);
|
|
return ret;
|
|
}
|