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pikapython/bsp/w806/Libraries/arch/xt804/libc/libc_port.c

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replace w806 bsp
2022-02-18 11:27:58 +08:00
/*
* Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/******************************************************************************
* @file libc_port.c
* @brief libc port
* @version V1.0
* @date 26. Dec 2017
******************************************************************************/
#include <stdio.h>
#include <ctype.h>
#include <stdint.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <limits.h>
#include <stdbool.h>
#include "stddef.h"
#include <csi_config.h>
#include "wm_regs.h"
#include "wm_hal.h"
#include "pikascript.h"
int sendchar(int ch)
{
while((READ_REG(UART0->FIFOS) & 0x3F) >= 32);
WRITE_REG(UART0->TDW, (char)ch);
return ch;
}
char recvchar(void)
{
char c=0;
while((READ_REG(UART0->FIFOS) & 0xFC0) == 0);
c=(char)READ_REG(UART0->RDW);
return c;
}
int sendchar1(int ch)
{
while(READ_REG(UART1->FIFOS) & 0x3F);
WRITE_REG(UART1->TDW, (char)ch);
return ch;
}
int fputc(int ch, FILE *stream)
{
(void)stream;
#if USE_UART0_PRINT
sendchar(ch);
#else
sendchar1(ch);
#endif
return 0;
}
#if 1//defined(__MINILIBC__)
int fgetc(FILE *stream)
{
char c=0;
(void)stream;
c=recvchar();
return c;
}
#endif
int getchar(void)
{
char c=0;
c=recvchar();
return c;
}
#if 1//defined(_NEWLIB_VERSION_H__)
//_ssize_t _write_r (struct _reent *, int, const void *, size_t) /* ignore warning */
int _write_r(void *r, int file, const void *ptr, size_t len)
{
size_t i;
char *p;
p = (char*) ptr;
for (i = 0; i < len; i++)
{
(void)fputc(*p++, r); /* r: ignore warning */
}
return len;
}
#endif
static int __ip2str(unsigned char v4v6, unsigned int *inuint, char *outtxt)
{
unsigned char i;
unsigned char j = 0;
unsigned char k;
unsigned char h;
unsigned char m;
unsigned char l;
unsigned char bit;
if (4 == v4v6)
{
for(i = 0; i < 4; i++)
{
bit = (*inuint >> (8 * i)) & 0xff;
h = bit / 100;
if (h)
outtxt[j++] = '0' + h;
m = (bit % 100) / 10;
if (m)
{
outtxt[j++] = '0' + m;
}
else
{
if (h)
outtxt[j++] = '0';
}
l = (bit % 100) % 10;
outtxt[j++] = '0' + l;
outtxt[j++] = '.';
}
}
else
{
for (k = 0; k < 4; k++)
{
for(i = 0; i < 4; i++)
{
m = (*inuint >> (8 * i)) & 0xff;
h = m >> 4;
l = m & 0xf;
if (h > 9)
outtxt[j++] = 'A' + h - 10;
else
outtxt[j++]= '0' + h;
if (l > 9)
outtxt[j++] = 'A' + l - 10;
else
outtxt[j++] = '0' + l;
if (0 != (i % 2))
outtxt[j++] = ':';
}
inuint++;
}
}
outtxt[j - 1] = 0;
return j - 1;
}
static int __mac2str(unsigned char *inchar, char *outtxt)
{
unsigned char hbit,lbit;
unsigned int i;
for(i = 0; i < 6; i++)/* mac length */
{
hbit = (*(inchar + i) & 0xf0) >> 4;
lbit = *(inchar + i ) & 0x0f;
if (hbit > 9)
outtxt[3 * i] = 'A' + hbit - 10;
else
outtxt[3 * i]= '0' + hbit;
if (lbit > 9)
outtxt[3 * i + 1] = 'A' + lbit - 10;
else
outtxt[3 * i + 1] = '0' + lbit;
outtxt[3 * i + 2] = '-';
}
outtxt[3 * (i - 1) + 2] = 0;
return 3 * (i - 1) + 2;
}
static inline int digitval(int ch)
{
if ( ch >= '0' && ch <= '9' ) {
return ch-'0';
} else if ( ch >= 'A' && ch <= 'Z' ) {
return ch-'A'+10;
} else if ( ch >= 'a' && ch <= 'z' ) {
return ch-'a'+10;
} else {
return -1;
}
}
uintmax_t strntoumax(const char *nptr, char **endptr, int base, size_t n)
{
int minus = 0;
uintmax_t v = 0;
int d;
while ( n && isspace((unsigned char)*nptr) ) {
nptr++;
n--;
}
/* Single optional + or - */
if ( n && *nptr == '-' ) {
minus = 1;
nptr++;
n--;
} else if ( n && *nptr == '+' ) {
nptr++;
}
if ( base == 0 ) {
if ( n >= 2 && nptr[0] == '0' &&
(nptr[1] == 'x' || nptr[1] == 'X') ) {
n -= 2;
nptr += 2;
base = 16;
} else if ( n >= 1 && nptr[0] == '0' ) {
n--;
nptr++;
base = 8;
} else {
base = 10;
}
} else if ( base == 16 ) {
if ( n >= 2 && nptr[0] == '0' &&
(nptr[1] == 'x' || nptr[1] == 'X') ) {
n -= 2;
nptr += 2;
}
}
while ( n && (d = digitval(*nptr)) >= 0 && d < base ) {
v = v*base + d;
n--;
nptr++;
}
if ( endptr )
*endptr = (char *)nptr;
return minus ? -v : v;
}
#ifndef LONG_BIT
#define LONG_BIT (CHAR_BIT*sizeof(long))
#endif
enum flags {
FL_SPLAT = 0x01, /* Drop the value, do not assign */
FL_INV = 0x02, /* Character-set with inverse */
FL_WIDTH = 0x04, /* Field width specified */
FL_MINUS = 0x08, /* Negative number */
};
enum ranks {
rank_char = -2,
rank_short = -1,
rank_int = 0,
rank_long = 1,
rank_longlong = 2,
rank_ptr = INT_MAX /* Special value used for pointers */
};
#define MIN_RANK rank_char
#define MAX_RANK rank_longlong
#define INTMAX_RANK rank_longlong
#define SIZE_T_RANK rank_long
#define PTRDIFF_T_RANK rank_long
enum bail {
bail_none = 0, /* No error condition */
bail_eof, /* Hit EOF */
bail_err /* Conversion mismatch */
};
static inline const char *
skipspace(const char *p)
{
while ( isspace((unsigned char)*p) ) p++;
return p;
}
#undef set_bit
static inline void
set_bit(unsigned long *bitmap, unsigned int bit)
{
bitmap[bit/LONG_BIT] |= 1UL << (bit%LONG_BIT);
}
#undef test_bit
static inline int
test_bit(unsigned long *bitmap, unsigned int bit)
{
return (int)(bitmap[bit/LONG_BIT] >> (bit%LONG_BIT)) & 1;
}
int wm_vsscanf(const char *buffer, const char *format, va_list ap)
{
const char *p = format;
char ch;
const char *q = buffer;
const char *qq;
uintmax_t val = 0;
int rank = rank_int; /* Default rank */
unsigned int width = UINT_MAX;
int base;
enum flags flags = 0;
enum {
st_normal, /* Ground state */
st_flags, /* Special flags */
st_width, /* Field width */
st_modifiers, /* Length or conversion modifiers */
st_match_init, /* Initial state of %[ sequence */
st_match, /* Main state of %[ sequence */
st_match_range, /* After - in a %[ sequence */
} state = st_normal;
char *sarg = NULL; /* %s %c or %[ string argument */
enum bail bail = bail_none;
int sign = 0;
int converted = 0; /* Successful conversions */
unsigned long matchmap[((1 << CHAR_BIT)+(LONG_BIT-1))/LONG_BIT];
int matchinv = 0; /* Is match map inverted? */
unsigned char range_start = 0;
sign = sign; /* gcc warning */
while ( (ch = *p++) && !bail ) {
switch ( state ) {
case st_normal:
if ( ch == '%' ) {
state = st_flags;
flags = 0; rank = rank_int; width = UINT_MAX;
} else if ( isspace((unsigned char)ch) ) {
q = skipspace(q);
} else {
if ( *q == ch )
q++;
else
bail = bail_err; /* Match failure */
}
break;
case st_flags:
switch ( ch ) {
case '*':
flags |= FL_SPLAT;
break;
case '0' ... '9':
width = (ch-'0');
state = st_width;
flags |= FL_WIDTH;
break;
default:
state = st_modifiers;
p--; /* Process this character again */
break;
}
break;
case st_width:
if ( ch >= '0' && ch <= '9' ) {
width = width*10+(ch-'0');
} else {
state = st_modifiers;
p--; /* Process this character again */
}
break;
case st_modifiers:
switch ( ch ) {
/* Length modifiers - nonterminal sequences */
case 'h':
rank--; /* Shorter rank */
break;
case 'l':
rank++; /* Longer rank */
break;
case 'j':
rank = INTMAX_RANK;
break;
case 'z':
rank = SIZE_T_RANK;
break;
case 't':
rank = PTRDIFF_T_RANK;
break;
case 'L':
case 'q':
rank = rank_longlong; /* long double/long long */
break;
default:
/* Output modifiers - terminal sequences */
state = st_normal; /* Next state will be normal */
if ( rank < MIN_RANK ) /* Canonicalize rank */
rank = MIN_RANK;
else if ( rank > MAX_RANK )
rank = MAX_RANK;
switch ( ch ) {
case 'P': /* Upper case pointer */
case 'p': /* Pointer */
#if 0 /* Enable this to allow null pointers by name */
q = skipspace(q);
if ( !isdigit((unsigned char)*q) ) {
static const char * const nullnames[] =
{ "null", "nul", "nil", "(null)", "(nul)", "(nil)", 0 };
const char * const *np;
/* Check to see if it's a null pointer by name */
for ( np = nullnames ; *np ; np++ ) {
if ( !strncasecmp(q, *np, strlen(*np)) ) {
val = (uintmax_t)((void *)NULL);
goto set_integer;
}
}
/* Failure */
bail = bail_err;
break;
}
/* else */
#endif
rank = rank_ptr;
base = 0; sign = 0;
goto scan_int;
case 'i': /* Base-independent integer */
base = 0; sign = 1;
goto scan_int;
case 'd': /* Decimal integer */
base = 10; sign = 1;
goto scan_int;
case 'o': /* Octal integer */
base = 8; sign = 0;
goto scan_int;
case 'u': /* Unsigned decimal integer */
base = 10; sign = 0;
goto scan_int;
case 'x': /* Hexadecimal integer */
case 'X':
base = 16; sign = 0;
goto scan_int;
case 'n': /* Number of characters consumed */
val = (q-buffer);
goto set_integer;
scan_int:
q = skipspace(q);
if ( !*q ) {
bail = bail_eof;
break;
}
val = strntoumax(q, (char **)&qq, base, width);
if ( qq == q ) {
bail = bail_err;
break;
}
q = qq;
converted++;
/* fall through */
set_integer:
if ( !(flags & FL_SPLAT) ) {
switch(rank) {
case rank_char:
*va_arg(ap, unsigned char *) = (unsigned char)val;
break;
case rank_short:
*va_arg(ap, unsigned short *) = (unsigned short)val;
break;
case rank_int:
*va_arg(ap, unsigned int *) = (unsigned int)val;
break;
case rank_long:
*va_arg(ap, unsigned long *) = (unsigned long)val;
break;
case rank_longlong:
*va_arg(ap, unsigned long long *) = (unsigned long long)val;
break;
case rank_ptr:
*va_arg(ap, void **) = (void *)(uintptr_t)val;
break;
}
}
break;
case 'c': /* Character */
width = (flags & FL_WIDTH) ? width : 1; /* Default width == 1 */
sarg = va_arg(ap, char *);
while ( width-- ) {
if ( !*q ) {
bail = bail_eof;
break;
}
*sarg++ = *q++;
}
if ( !bail )
converted++;
break;
case 's': /* String */
{
char *sp;
sp = sarg = va_arg(ap, char *);
while ( width-- && *q && !isspace((unsigned char)*q) ) {
*sp++ = *q++;
}
if ( sarg != sp ) {
*sp = '\0'; /* Terminate output */
converted++;
} else {
bail = bail_eof;
}
}
break;
case 'f': /* float */
{
float *vp = (float *) va_arg(ap, float *);
const char *vpq = q;
*vp = strtof(vpq, (char **)&q);
if ( vpq != q ) {
converted++;
} else {
//bail = bail_eof;
bail = bail_err;
}
}
break;
case 'g': /* double */
{
double *vp = (double *) va_arg(ap, double *);
const char *vpq = q;
*vp = strtod(vpq, (char **)&q);
if ( vpq != q ) {
converted++;
} else {
//bail = bail_eof;
bail = bail_err;
}
}
break;
case '[': /* Character range */
sarg = va_arg(ap, char *);
state = st_match_init;
matchinv = 0;
memset(matchmap, 0, sizeof matchmap);
break;
case '%': /* %% sequence */
if ( *q == '%' )
q++;
else
bail = bail_err;
break;
default: /* Anything else */
bail = bail_err; /* Unknown sequence */
break;
}
}
break;
case st_match_init: /* Initial state for %[ match */
if ( ch == '^' && !(flags & FL_INV) ) {
matchinv = 1;
} else {
set_bit(matchmap, (unsigned char)ch);
state = st_match;
}
break;
case st_match: /* Main state for %[ match */
if ( ch == ']' ) {
goto match_run;
} else if ( ch == '-' ) {
range_start = (unsigned char)ch;
state = st_match_range;
} else {
set_bit(matchmap, (unsigned char)ch);
}
break;
case st_match_range: /* %[ match after - */
if ( ch == ']' ) {
set_bit(matchmap, (unsigned char)'-'); /* - was last character */
goto match_run;
} else {
int i;
for ( i = range_start ; i < (unsigned char)ch ; i++ )
set_bit(matchmap, i);
state = st_match;
}
break;
match_run: /* Match expression finished */
qq = q;
while ( width && *q && test_bit(matchmap, (unsigned char)*q)^matchinv ) {
*sarg++ = *q++;
}
if ( q != qq ) {
*sarg = '\0';
converted++;
} else {
bail = *q ? bail_err : bail_eof;
}
break;
}
}
if ( bail == bail_eof && !converted )
converted = -1; /* Return EOF (-1) */
return converted;
}
#define PRINTF_NTOA_BUFFER_SIZE 32U
#define PRINTF_FTOA_BUFFER_SIZE 32U
#define PRINTF_SUPPORT_FLOAT
#define PRINTF_SUPPORT_EXPONENTIAL
#define PRINTF_DEFAULT_FLOAT_PRECISION 6U
#define PRINTF_MAX_FLOAT 1e9
#define PRINTF_SUPPORT_LONG_LONG
#define PRINTF_SUPPORT_PTRDIFF_T
// import float.h for DBL_MAX
#if defined(PRINTF_SUPPORT_FLOAT)
#include <float.h>
#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)
// output function type
typedef void (*out_fct_type)(char character, void* buffer, size_t idx, size_t maxlen);
// 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;
}
}
static inline void _out_uart(char character, void* buffer, size_t idx, size_t maxlen)
{
_write_r(NULL, 0, &character, 1);
}
// 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 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 < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = '0';
}
while ((flags & FLAGS_ZEROPAD) && (len < width) && (len < 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 < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = 'x';
}
else if ((base == 16U) && (flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = 'X';
}
else if ((base == 2U) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = 'b';
}
if (len < PRINTF_NTOA_BUFFER_SIZE) {
buf[len++] = '0';
}
}
if (len < 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[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++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10;
value /= base;
} while (value && (len < 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 defined(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[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++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10;
value /= base;
} while (value && (len < PRINTF_NTOA_BUFFER_SIZE));
}
return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int)base, prec, width, flags);
}
#endif // PRINTF_SUPPORT_LONG_LONG
#if defined(PRINTF_SUPPORT_FLOAT)
#if defined(PRINTF_SUPPORT_EXPONENTIAL)
// forward declaration so that _ftoa can switch to exp notation for values > 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
// 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[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 (value != 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 > PRINTF_MAX_FLOAT) || (value < -PRINTF_MAX_FLOAT)) {
#if defined(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 = 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 (!prec && 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 'M' : {
const char* p = va_arg(va, char*);
char store[40];
unsigned int l = __mac2str((unsigned char *)p, store);
const char* pstr = &store[0];
// 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 ((*pstr != 0) && (!(flags & FLAGS_PRECISION) || precision--)) {
out(*(pstr++), buffer, idx++, maxlen);
}
// post padding
if (flags & FLAGS_LEFT) {
while (l++ < width) {
out(' ', buffer, idx++, maxlen);
}
}
format++;
break;
}
case 'v' : {
uint32_t ipv4 = va_arg(va, uint32_t);
char store[40];
unsigned int l = __ip2str(4, &ipv4, store);
const char* pstr = &store[0];
// 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 ((*pstr != 0) && (!(flags & FLAGS_PRECISION) || precision--)) {
out(*(pstr++), buffer, idx++, maxlen);
}
// post padding
if (flags & FLAGS_LEFT) {
while (l++ < width) {
out(' ', buffer, idx++, maxlen);
}
}
format++;
break;
}
case 'V' : {
char *ipv6 = va_arg(va, char*);
char store[40];
unsigned int l = __ip2str(6, (unsigned int *)ipv6, store);
const char* pstr = &store[0];
// 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 ((*pstr != 0) && (!(flags & FLAGS_PRECISION) || precision--)) {
out(*(pstr++), buffer, idx++, maxlen);
}
// post padding
if (flags & FLAGS_LEFT) {
while (l++ < width) {
out(' ', buffer, idx++, maxlen);
}
}
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 wm_vsnprintf(char* buffer, size_t count, const char* format, va_list va)
{
return _vsnprintf(_out_buffer, buffer, count, format, va);
}
char __platform_getchar(void)
{
return (char)getchar();
}
void __platform_printf(char* fmt, ...)
{
va_list args;
size_t length;
va_start(args, fmt);
length = _vsnprintf(_out_uart, (char*)fmt, (size_t) - 1, fmt, args);
va_end(args);
return length;
}
int wm_printf(const char *fmt,...)
{
va_list args;
size_t length;
va_start(args, fmt);
length = _vsnprintf(_out_uart, (char*)fmt, (size_t) - 1, fmt, args);
va_end(args);
return length;
}
int wm_vprintf(const char *fmt, va_list arg_ptr)
{
size_t length;
length = _vsnprintf(_out_uart, (char*)fmt, (size_t) - 1, fmt, arg_ptr);
return length;
}
#if 1//defined(_NEWLIB_VERSION_H__)
__attribute__((weak)) int sscanf(const char *str, const char *format, ...) /* bug: replace 3.10.21 newlib */
{
va_list args;
int i;
va_start(args,format);
i = wm_vsscanf(str, format, args);
va_end(args);
return i;
}
__attribute__((weak)) int __cskyvscanfsscanf(const char *str, const char *format, ...)
{
va_list args;
int i;
va_start(args,format);
i = wm_vsscanf(str, format, args);
va_end(args);
return i;
}
__attribute__((weak)) int __cskyvprintfsprintf(char *str, const char *format, ...)
{
va_list ap;
int i;
va_start(ap, format);
i = wm_vsnprintf(str, (size_t) - 1, format, ap);
va_end(ap);
return i;
}
__attribute__((weak)) int __cskyvprintfsnprintf(char *str, size_t size, const char *format, ...)
{
va_list ap;
int i;
va_start(ap, format);
i = wm_vsnprintf(str, size, format, ap);
va_end(ap);
return i;
}
__attribute__((weak)) int __cskyvprintfvsnprintf(char *str, size_t size, const char *format, va_list ap)
{
return wm_vsnprintf(str, size, format, ap);
}
__attribute__((weak)) int __cskyvprintfvsprintf(char *str, const char *format, va_list ap)
{
return wm_vsnprintf(str, (size_t) - 1, format, ap);
}
int __cskyvprintfprintf(const char *fmt, ...) __attribute__((weak, alias("wm_printf")));
__attribute__((weak)) void __assert_fail(const char *file,
int line,
const char *func,
const char *failedexpr)
{
wm_printf("assertion \"%s\" failed: file \"%s\", line %d%s%s\r\n",
failedexpr, file, line,
func ? ", function: " : "", func ? func : "");
while(1);
}
#endif
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