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@@ -0,0 +1,1037 @@
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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 (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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+
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+#include <stdbool.h>
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+#include <stdint.h>
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+
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+#include "printf_tiny.h"
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+///////////////////////////////////////////////////////////////////////////////
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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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+
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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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+
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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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+
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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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+
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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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+ if(idx < maxlen) {
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+ ((char*)buffer)[idx] = character;
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+ }
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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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+ (void)character;
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+ (void)buffer;
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+ (void)idx;
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+ (void)maxlen;
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+}
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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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+ (void)buffer;
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+ (void)idx;
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+ (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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+
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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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+ (void)idx;
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+ (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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+
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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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+ const char* s;
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+ for(s = str; *s && maxsize--; ++s)
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+ ;
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+ return (unsigned int)(s - str);
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+}
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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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+ return (ch >= '0') && (ch <= '9');
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+}
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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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+ 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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+
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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(
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+ out_fct_type out,
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+ char* buffer,
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+ size_t idx,
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+ size_t maxlen,
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+ const char* buf,
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+ size_t len,
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+ unsigned int width,
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+ unsigned int flags) {
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+ const size_t start_idx = idx;
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+
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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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+
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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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+
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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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+
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+ return idx;
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+}
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+
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+// internal itoa format
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+static size_t _ntoa_format(
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+ out_fct_type out,
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+ char* buffer,
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+ size_t idx,
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+ size_t maxlen,
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+ char* buf,
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+ size_t len,
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+ bool negative,
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+ unsigned int base,
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+ unsigned int prec,
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+ unsigned int width,
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+ unsigned int flags) {
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+ // pad leading zeros
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+ if(!(flags & FLAGS_LEFT)) {
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+ if(width && (flags & FLAGS_ZEROPAD) &&
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+ (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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+
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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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+ } else if((base == 16U) && (flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
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+ buf[len++] = 'X';
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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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+
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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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+ } else if(flags & FLAGS_PLUS) {
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+ buf[len++] = '+'; // ignore the space if the '+' exists
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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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+
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+ return _out_rev(out, buffer, idx, maxlen, buf, len, width, flags);
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+}
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+
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+// internal itoa for 'long' type
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+static size_t _ntoa_long(
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+ out_fct_type out,
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+ char* buffer,
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+ size_t idx,
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+ size_t maxlen,
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+ unsigned long value,
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+ bool negative,
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+ unsigned long base,
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+ unsigned int prec,
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+ unsigned int width,
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+ unsigned int flags) {
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+ char buf[PRINTF_NTOA_BUFFER_SIZE];
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+ size_t len = 0U;
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+
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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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+
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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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+ do {
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+ const char digit = (char)(value % base);
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+ buf[len++] = digit < 10 ? '0' + digit :
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+ (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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+
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+ return _ntoa_format(
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+ out, buffer, idx, maxlen, buf, len, negative, (unsigned int)base, prec, width, flags);
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+}
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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(
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+ out_fct_type out,
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+ char* buffer,
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+ size_t idx,
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+ size_t maxlen,
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+ unsigned long long value,
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+ bool negative,
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+ unsigned long long base,
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+ unsigned int prec,
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+ unsigned int width,
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+ unsigned int flags) {
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+ char buf[PRINTF_NTOA_BUFFER_SIZE];
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+ size_t len = 0U;
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+
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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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+
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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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+ do {
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+ const char digit = (char)(value % base);
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+ buf[len++] = digit < 10 ? '0' + digit :
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+ (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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+
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+ return _ntoa_format(
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+ 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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+
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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(
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+ out_fct_type out,
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+ char* buffer,
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+ size_t idx,
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+ size_t maxlen,
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+ double value,
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+ unsigned int prec,
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+ unsigned int width,
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+ unsigned int flags);
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+#endif
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+
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+// internal ftoa for fixed decimal floating point
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+static size_t _ftoa(
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+ out_fct_type out,
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+ char* buffer,
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+ size_t idx,
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+ size_t maxlen,
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+ double value,
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+ unsigned int prec,
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+ unsigned int width,
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+ unsigned int flags) {
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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[] = {
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+ 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) return _out_rev(out, buffer, idx, maxlen, "nan", 3, width, flags);
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+ if(value < -DBL_MAX) 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(
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+ out,
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+ buffer,
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+ idx,
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+ maxlen,
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+ (flags & FLAGS_PLUS) ? "fni+" : "fni",
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+ (flags & FLAGS_PLUS) ? 4U : 3U,
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+ width,
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+ 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;
|
|
|
+ }
|
|
|
+
|
|
|
+ // set default precision, if not set explicitly
|
|
|
+ if(!(flags & FLAGS_PRECISION)) {
|
|
|
+ prec = PRINTF_DEFAULT_FLOAT_PRECISION;
|
|
|
+ }
|
|
|
+ // limit precision to 9, cause a prec >= 10 can lead to overflow errors
|
|
|
+ while((len < PRINTF_FTOA_BUFFER_SIZE) && (prec > 9U)) {
|
|
|
+ buf[len++] = '0';
|
|
|
+ prec--;
|
|
|
+ }
|
|
|
+
|
|
|
+ int whole = (int)value;
|
|
|
+ double tmp = (value - whole) * pow10[prec];
|
|
|
+ unsigned long frac = (unsigned long)tmp;
|
|
|
+ diff = tmp - frac;
|
|
|
+
|
|
|
+ if(diff > 0.5) {
|
|
|
+ ++frac;
|
|
|
+ // handle rollover, e.g. case 0.99 with prec 1 is 1.0
|
|
|
+ if(frac >= pow10[prec]) {
|
|
|
+ frac = 0;
|
|
|
+ ++whole;
|
|
|
+ }
|
|
|
+ } else if(diff < 0.5) {
|
|
|
+ } else if((frac == 0U) || (frac & 1U)) {
|
|
|
+ // if halfway, round up if odd OR if last digit is 0
|
|
|
+ ++frac;
|
|
|
+ }
|
|
|
+
|
|
|
+ if(prec == 0U) {
|
|
|
+ diff = value - (double)whole;
|
|
|
+ if((!(diff < 0.5) || (diff > 0.5)) && (whole & 1)) {
|
|
|
+ // exactly 0.5 and ODD, then round up
|
|
|
+ // 1.5 -> 2, but 2.5 -> 2
|
|
|
+ ++whole;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ unsigned int count = prec;
|
|
|
+ // now do fractional part, as an unsigned number
|
|
|
+ while(len < PRINTF_FTOA_BUFFER_SIZE) {
|
|
|
+ --count;
|
|
|
+ buf[len++] = (char)(48U + (frac % 10U));
|
|
|
+ if(!(frac /= 10U)) {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // add extra 0s
|
|
|
+ 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;
|
|
|
+}
|
SG