Squashed 'third_party/pico-sdk/' content from commit 2062372d2
Change-Id: Ic20f199d3ed0ea8d3a6a1bbf513f875ec7500cc6
git-subtree-dir: third_party/pico-sdk
git-subtree-split: 2062372d203b372849d573f252cf7c6dc2800c0a
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/src/rp2_common/pico_printf/printf.c b/src/rp2_common/pico_printf/printf.c
new file mode 100644
index 0000000..2594c57
--- /dev/null
+++ b/src/rp2_common/pico_printf/printf.c
@@ -0,0 +1,942 @@
+///////////////////////////////////////////////////////////////////////////////
+// \author (c) Marco Paland (info@paland.com)
+// 2014-2019, PALANDesign Hannover, Germany
+//
+// \license The MIT License (MIT)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+// \brief Tiny printf, sprintf and (v)snprintf implementation, optimized for speed on
+// embedded systems with a very limited resources. These routines are thread
+// safe and reentrant!
+// Use this instead of the bloated standard/newlib printf cause these use
+// malloc for printf (and may not be thread safe).
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "pico/platform.h"
+#include "pico/printf.h"
+
+// PICO_CONFIG: PICO_PRINTF_NTOA_BUFFER_SIZE, Define printf ntoa buffer size, min=0, max=128, default=32, group=pico_printf
+// 'ntoa' conversion buffer size, this must be big enough to hold one converted
+// numeric number including padded zeros (dynamically created on stack)
+#ifndef PICO_PRINTF_NTOA_BUFFER_SIZE
+#define PICO_PRINTF_NTOA_BUFFER_SIZE 32U
+#endif
+
+// PICO_CONFIG: PICO_PRINTF_FTOA_BUFFER_SIZE, Define printf ftoa buffer size, min=0, max=128, default=32, group=pico_printf
+// 'ftoa' conversion buffer size, this must be big enough to hold one converted
+// float number including padded zeros (dynamically created on stack)
+#ifndef PICO_PRINTF_FTOA_BUFFER_SIZE
+#define PICO_PRINTF_FTOA_BUFFER_SIZE 32U
+#endif
+
+// PICO_CONFIG: PICO_PRINTF_SUPPORT_FLOAT, Enable floating point printing, type=bool, default=1, group=pico_printf
+// support for the floating point type (%f)
+#ifndef PICO_PRINTF_SUPPORT_FLOAT
+#define PICO_PRINTF_SUPPORT_FLOAT 1
+#endif
+
+// PICO_CONFIG: PICO_PRINTF_SUPPORT_EXPONENTIAL, Enable exponential floating point printing, type=bool, default=1, group=pico_printf
+// support for exponential floating point notation (%e/%g)
+#ifndef PICO_PRINTF_SUPPORT_EXPONENTIAL
+#define PICO_PRINTF_SUPPORT_EXPONENTIAL 1
+#endif
+
+// PICO_CONFIG: PICO_PRINTF_DEFAULT_FLOAT_PRECISION, Define default floating point precision, min=1, max=16, default=6, group=pico_printf
+#ifndef PICO_PRINTF_DEFAULT_FLOAT_PRECISION
+#define PICO_PRINTF_DEFAULT_FLOAT_PRECISION 6U
+#endif
+
+// PICO_CONFIG: PICO_PRINTF_MAX_FLOAT, Define the largest float suitable to print with %f, min=1, max=1e9, default=1e9, group=pico_printf
+#ifndef PICO_PRINTF_MAX_FLOAT
+#define PICO_PRINTF_MAX_FLOAT 1e9
+#endif
+
+// PICO_CONFIG: PICO_PRINTF_SUPPORT_LONG_LONG, Enable support for long long types (%llu or %p), type=bool, default=1, group=pico_printf
+#ifndef PICO_PRINTF_SUPPORT_LONG_LONG
+#define PICO_PRINTF_SUPPORT_LONG_LONG 1
+#endif
+
+// PICO_CONFIG: PICO_PRINTF_SUPPORT_PTRDIFF_T, Enable support for the ptrdiff_t type (%t), type=bool, default=1, group=pico_printf
+// ptrdiff_t is normally defined in <stddef.h> as long or long long type
+#ifndef PICO_PRINTF_SUPPORT_PTRDIFF_T
+#define PICO_PRINTF_SUPPORT_PTRDIFF_T 1
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+
+// internal flag definitions
+#define FLAGS_ZEROPAD (1U << 0U)
+#define FLAGS_LEFT (1U << 1U)
+#define FLAGS_PLUS (1U << 2U)
+#define FLAGS_SPACE (1U << 3U)
+#define FLAGS_HASH (1U << 4U)
+#define FLAGS_UPPERCASE (1U << 5U)
+#define FLAGS_CHAR (1U << 6U)
+#define FLAGS_SHORT (1U << 7U)
+#define FLAGS_LONG (1U << 8U)
+#define FLAGS_LONG_LONG (1U << 9U)
+#define FLAGS_PRECISION (1U << 10U)
+#define FLAGS_ADAPT_EXP (1U << 11U)
+
+// import float.h for DBL_MAX
+#if PICO_PRINTF_SUPPORT_FLOAT
+
+#include <float.h>
+
+#endif
+
+/**
+ * Output a character to a custom device like UART, used by the printf() function
+ * This function is declared here only. You have to write your custom implementation somewhere
+ * \param character Character to output
+ */
+static void _putchar(char character) {
+ putchar(character);
+}
+
+// output function type
+typedef void (*out_fct_type)(char character, void *buffer, size_t idx, size_t maxlen);
+
+#if !PICO_PRINTF_ALWAYS_INCLUDED
+// we don't have a way to specify a truly weak symbol reference (the linker will always include targets in a single link step,
+// so we make a function pointer that is initialized on the first printf called... if printf is not included in the binary
+// (or has never been called - we can't tell) then this will be null. the assumption is that if you are using printf
+// you are likely to have printed something.
+static int (*lazy_vsnprintf)(out_fct_type out, char *buffer, const size_t maxlen, const char *format, va_list va);
+#endif
+
+// wrapper (used as buffer) for output function type
+typedef struct {
+ void (*fct)(char character, void *arg);
+ void *arg;
+} out_fct_wrap_type;
+
+// internal buffer output
+static inline void _out_buffer(char character, void *buffer, size_t idx, size_t maxlen) {
+ if (idx < maxlen) {
+ ((char *) buffer)[idx] = character;
+ }
+}
+
+// internal null output
+static inline void _out_null(char character, void *buffer, size_t idx, size_t maxlen) {
+ (void) character;
+ (void) buffer;
+ (void) idx;
+ (void) maxlen;
+}
+
+// internal _putchar wrapper
+static inline void _out_char(char character, void *buffer, size_t idx, size_t maxlen) {
+ (void) buffer;
+ (void) idx;
+ (void) maxlen;
+ if (character) {
+ _putchar(character);
+ }
+}
+
+
+// internal output function wrapper
+static inline void _out_fct(char character, void *buffer, size_t idx, size_t maxlen) {
+ (void) idx;
+ (void) maxlen;
+ if (character) {
+ // buffer is the output fct pointer
+ ((out_fct_wrap_type *) buffer)->fct(character, ((out_fct_wrap_type *) buffer)->arg);
+ }
+}
+
+
+// internal secure strlen
+// \return The length of the string (excluding the terminating 0) limited by 'maxsize'
+static inline unsigned int _strnlen_s(const char *str, size_t maxsize) {
+ const char *s;
+ for (s = str; *s && maxsize--; ++s);
+ return (unsigned int) (s - str);
+}
+
+
+// internal test if char is a digit (0-9)
+// \return true if char is a digit
+static inline bool _is_digit(char ch) {
+ return (ch >= '0') && (ch <= '9');
+}
+
+
+// internal ASCII string to unsigned int conversion
+static unsigned int _atoi(const char **str) {
+ unsigned int i = 0U;
+ while (_is_digit(**str)) {
+ i = i * 10U + (unsigned int) (*((*str)++) - '0');
+ }
+ return i;
+}
+
+
+// output the specified string in reverse, taking care of any zero-padding
+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) {
+ const size_t start_idx = idx;
+
+ // pad spaces up to given width
+ if (!(flags & FLAGS_LEFT) && !(flags & FLAGS_ZEROPAD)) {
+ for (size_t i = len; i < width; i++) {
+ out(' ', buffer, idx++, maxlen);
+ }
+ }
+
+ // reverse string
+ while (len) {
+ out(buf[--len], buffer, idx++, maxlen);
+ }
+
+ // append pad spaces up to given width
+ if (flags & FLAGS_LEFT) {
+ while (idx - start_idx < width) {
+ out(' ', buffer, idx++, maxlen);
+ }
+ }
+
+ return idx;
+}
+
+
+// internal itoa format
+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) {
+ // pad leading zeros
+ if (!(flags & FLAGS_LEFT)) {
+ if (width && (flags & FLAGS_ZEROPAD) && (negative || (flags & (FLAGS_PLUS | FLAGS_SPACE)))) {
+ width--;
+ }
+ while ((len < prec) && (len < PICO_PRINTF_NTOA_BUFFER_SIZE)) {
+ buf[len++] = '0';
+ }
+ while ((flags & FLAGS_ZEROPAD) && (len < width) && (len < PICO_PRINTF_NTOA_BUFFER_SIZE)) {
+ buf[len++] = '0';
+ }
+ }
+
+ // handle hash
+ if (flags & FLAGS_HASH) {
+ if (!(flags & FLAGS_PRECISION) && len && ((len == prec) || (len == width))) {
+ len--;
+ if (len && (base == 16U)) {
+ len--;
+ }
+ }
+ if ((base == 16U) && !(flags & FLAGS_UPPERCASE) && (len < PICO_PRINTF_NTOA_BUFFER_SIZE)) {
+ buf[len++] = 'x';
+ } else if ((base == 16U) && (flags & FLAGS_UPPERCASE) && (len < PICO_PRINTF_NTOA_BUFFER_SIZE)) {
+ buf[len++] = 'X';
+ } else if ((base == 2U) && (len < PICO_PRINTF_NTOA_BUFFER_SIZE)) {
+ buf[len++] = 'b';
+ }
+ if (len < PICO_PRINTF_NTOA_BUFFER_SIZE) {
+ buf[len++] = '0';
+ }
+ }
+
+ if (len < PICO_PRINTF_NTOA_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);
+}
+
+
+// internal itoa for 'long' type
+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) {
+ char buf[PICO_PRINTF_NTOA_BUFFER_SIZE];
+ size_t len = 0U;
+
+ // no hash for 0 values
+ if (!value) {
+ flags &= ~FLAGS_HASH;
+ }
+
+ // write if precision != 0 and value is != 0
+ if (!(flags & FLAGS_PRECISION) || value) {
+ do {
+ const char digit = (char) (value % base);
+ buf[len++] = (char)(digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10);
+ value /= base;
+ } while (value && (len < PICO_PRINTF_NTOA_BUFFER_SIZE));
+ }
+
+ return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int) base, prec, width, flags);
+}
+
+
+// internal itoa for 'long long' type
+#if PICO_PRINTF_SUPPORT_LONG_LONG
+
+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) {
+ char buf[PICO_PRINTF_NTOA_BUFFER_SIZE];
+ size_t len = 0U;
+
+ // no hash for 0 values
+ if (!value) {
+ flags &= ~FLAGS_HASH;
+ }
+
+ // write if precision != 0 and value is != 0
+ if (!(flags & FLAGS_PRECISION) || value) {
+ do {
+ const char digit = (char) (value % base);
+ buf[len++] = (char)(digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10);
+ value /= base;
+ } while (value && (len < PICO_PRINTF_NTOA_BUFFER_SIZE));
+ }
+
+ return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int) base, prec, width, flags);
+}
+
+#endif // PICO_PRINTF_SUPPORT_LONG_LONG
+
+
+#if PICO_PRINTF_SUPPORT_FLOAT
+
+#if PICO_PRINTF_SUPPORT_EXPONENTIAL
+// forward declaration so that _ftoa can switch to exp notation for values > PICO_PRINTF_MAX_FLOAT
+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);
+#endif
+
+#define is_nan __builtin_isnan
+
+// internal ftoa for fixed decimal floating point
+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) {
+ char buf[PICO_PRINTF_FTOA_BUFFER_SIZE];
+ size_t len = 0U;
+ double diff = 0.0;
+
+ // powers of 10
+ static const double pow10[] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000};
+
+ // test for special values
+ if (is_nan(value))
+ return _out_rev(out, buffer, idx, maxlen, "nan", 3, width, flags);
+ if (value < -DBL_MAX)
+ return _out_rev(out, buffer, idx, maxlen, "fni-", 4, width, flags);
+ if (value > DBL_MAX)
+ return _out_rev(out, buffer, idx, maxlen, (flags & FLAGS_PLUS) ? "fni+" : "fni", (flags & FLAGS_PLUS) ? 4U : 3U,
+ width, flags);
+
+ // test for very large values
+ // standard printf behavior is to print EVERY whole number digit -- which could be 100s of characters overflowing your buffers == bad
+ if ((value > PICO_PRINTF_MAX_FLOAT) || (value < -PICO_PRINTF_MAX_FLOAT)) {
+#if PICO_PRINTF_SUPPORT_EXPONENTIAL
+ return _etoa(out, buffer, idx, maxlen, value, prec, width, flags);
+#else
+ return 0U;
+#endif
+ }
+
+ // test for negative
+ bool negative = false;
+ if (value < 0) {
+ negative = true;
+ value = 0 - value;
+ }
+
+ // set default precision, if not set explicitly
+ if (!(flags & FLAGS_PRECISION)) {
+ prec = PICO_PRINTF_DEFAULT_FLOAT_PRECISION;
+ }
+ // limit precision to 9, cause a prec >= 10 can lead to overflow errors
+ while ((len < PICO_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 < PICO_PRINTF_FTOA_BUFFER_SIZE) {
+ --count;
+ buf[len++] = (char) (48U + (frac % 10U));
+ if (!(frac /= 10U)) {
+ break;
+ }
+ }
+ // add extra 0s
+ while ((len < PICO_PRINTF_FTOA_BUFFER_SIZE) && (count-- > 0U)) {
+ buf[len++] = '0';
+ }
+ if (len < PICO_PRINTF_FTOA_BUFFER_SIZE) {
+ // add decimal
+ buf[len++] = '.';
+ }
+ }
+
+ // do whole part, number is reversed
+ while (len < PICO_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 < PICO_PRINTF_FTOA_BUFFER_SIZE)) {
+ buf[len++] = '0';
+ }
+ }
+
+ if (len < PICO_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 PICO_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 (is_nan(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 = PICO_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 expval;
+ if (conv.U) {
+ 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
+ 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;
+ }
+ } else {
+ expval = 0;
+ }
+
+ // 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 ((conv.U == 0) || ((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, (uint)((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 // PICO_PRINTF_SUPPORT_EXPONENTIAL
+#endif // PICO_PRINTF_SUPPORT_FLOAT
+
+// internal vsnprintf
+static int _vsnprintf(out_fct_type out, char *buffer, const size_t maxlen, const char *format, va_list va) {
+#if !PICO_PRINTF_ALWAYS_INCLUDED
+ lazy_vsnprintf = _vsnprintf;
+#endif
+ 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 PICO_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 PICO_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 PICO_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;
+ }
+ case 'f' :
+ case 'F' :
+#if PICO_PRINTF_SUPPORT_FLOAT
+ if (*format == 'F') flags |= FLAGS_UPPERCASE;
+ idx = _ftoa(out, buffer, idx, maxlen, va_arg(va, double), precision, width, flags);
+#else
+ for(int i=0;i<2;i++) out('?', buffer, idx++, maxlen);
+ va_arg(va, double);
+#endif
+ format++;
+ break;
+ case 'e':
+ case 'E':
+ case 'g':
+ case 'G':
+#if PICO_PRINTF_SUPPORT_FLOAT && PICO_PRINTF_SUPPORT_EXPONENTIAL
+ 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);
+#else
+ for(int i=0;i<2;i++) out('?', buffer, idx++, maxlen);
+ va_arg(va, double);
+#endif
+ format++;
+ break;
+ 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 PICO_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 PICO_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 WRAPPER_FUNC(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 WRAPPER_FUNC(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 WRAPPER_FUNC(vsnprintf)(char *buffer, size_t count, const char *format, va_list va) {
+ return _vsnprintf(_out_buffer, buffer, count, format, va);
+}
+
+int vfctprintf(void (*out)(char character, void *arg), void *arg, const char *format, va_list va) {
+ const out_fct_wrap_type out_fct_wrap = {out, arg};
+ return _vsnprintf(_out_fct, (char *) (uintptr_t) &out_fct_wrap, (size_t) -1, format, va);
+}
+
+#if LIB_PICO_PRINTF_PICO
+#if !PICO_PRINTF_ALWAYS_INCLUDED
+bool weak_raw_printf(const char *fmt, ...) {
+ va_list va;
+ va_start(va, fmt);
+ bool rc = weak_raw_vprintf(fmt, va);
+ va_end(va);
+ return rc;
+}
+
+bool weak_raw_vprintf(const char *fmt, va_list args) {
+ if (lazy_vsnprintf) {
+ char buffer[1];
+ lazy_vsnprintf(_out_char, buffer, (size_t) -1, fmt, args);
+ return true;
+ } else {
+ puts(fmt);
+ return false;
+ }
+}
+#endif
+#endif