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/*
* SPDX-FileCopyrightText: 2010-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdint.h>
#include <stdbool.h>
#include <stdarg.h>
#include <stddef.h>
#include <sys/param.h>
#include "esp_rom_caps.h"
#include "esp_rom_sys.h"
#include "rom/ets_sys.h"
#include "sdkconfig.h"
#if !ESP_ROM_HAS_VPRINTF_FUNC
static int _cvt(unsigned long long val, char *buf, long radix, const char *digits)
{
#ifdef SUPPORT_LITTLE_RADIX
char temp[64];
#else
char temp[32];
#endif
char *cp = temp;
int length = 0;
if (val == 0) {
/* Special case */
*cp++ = '0';
} else {
while (val) {
*cp++ = digits[val % radix];
val /= radix;
}
}
while (cp != temp) {
*buf++ = *--cp;
length++;
}
*buf = '\0';
return (length);
}
#define is_digit(c) ((c >= '0') && (c <= '9'))
static int ets_vprintf(void (*putc)(char c), const char *fmt, va_list ap)
{
#ifdef BINARY_SUPPORT
char buf[sizeof(long long)*8];
#else
char buf[32];
#endif
char c, sign, *cp=buf;
int left_prec, right_prec, zero_fill, pad, pad_on_right,
islong, islonglong;
long long val = 0;
int res = 0, length = 0;
// %[flags][left_prec][.right_prec][sub_type]type
while ((c = *fmt++) != '\0') {
if (c == '%') {
c = *fmt++;
left_prec = right_prec = pad_on_right = islong = islonglong = 0;
if (c == '-') {
c = *fmt++;
pad_on_right++;
}
if (c == '0') {
zero_fill = true;
c = *fmt++;
} else {
zero_fill = false;
}
while (is_digit(c)) {
left_prec = (left_prec * 10) + (c - '0');
c = *fmt++;
}
if (c == '.') {
c = *fmt++;
zero_fill = false;
while (is_digit(c)) {
right_prec = (right_prec * 10) + (c - '0');
c = *fmt++;
}
}
sign = '\0';
if (c == 'l') {
c = *fmt++;
islong = 1;
if (c == 'l') {
c = *fmt++;
islonglong = 1;
islong = 0;
}
}
switch (c) {
case 'p':
islong = 1;
/* fall through */
case 'd':
case 'D':
case 'x':
case 'X':
case 'u':
case 'U':
#ifdef BINARY_SUPPORT
case 'b':
case 'B':
#endif
if (islonglong) {
val = va_arg(ap, long long);
} else if (islong) {
val = (long long)va_arg(ap, long);
} else {
val = (long long)va_arg(ap, int);
}
if ((c == 'd') || (c == 'D')) {
if (val < 0) {
sign = '-';
val = -val;
}
} else {
if (islonglong) {
;
} else if (islong) {
val &= ((long long)1 << (sizeof(long) * 8)) - 1;
} else {
val &= ((long long)1 << (sizeof(int) * 8)) - 1;
}
}
break;
default:
break;
}
switch (c) {
case 'p':
(*putc)('0');
(*putc)('x');
zero_fill = true;
left_prec = sizeof(unsigned long)*2;
/* fall through */
case 'd':
case 'D':
case 'u':
case 'U':
case 'x':
case 'X':
switch (c) {
case 'd':
case 'D':
case 'u':
case 'U':
length = _cvt(val, buf, 10, "0123456789");
break;
case 'p':
case 'x':
length = _cvt(val, buf, 16, "0123456789abcdef");
break;
case 'X':
length = _cvt(val, buf, 16, "0123456789ABCDEF");
break;
}
cp = buf;
break;
case 's':
case 'S':
cp = va_arg(ap, char *);
if (cp == NULL) {
cp = (char *)"<null>";
}
length = 0;
while (cp[length] != '\0') length++;
if (right_prec) {
length = MIN(right_prec, length);
right_prec = 0;
}
break;
case 'c':
case 'C':
c = va_arg(ap, int /*char*/);
(*putc)(c);
res++;
continue;
#ifdef BINARY_SUPPORT
case 'b':
case 'B':
length = left_prec;
if (left_prec == 0) {
if (islonglong)
length = sizeof(long long)*8;
else if (islong)
length = sizeof(long)*8;
else
length = sizeof(int)*8;
}
for (i = 0; i < length-1; i++) {
buf[i] = ((val & ((long long)1<<i)) ? '1' : '.');
}
cp = buf;
break;
#endif
case '%':
(*putc)('%');
break;
default:
(*putc)('%');
(*putc)(c);
res += 2;
}
pad = left_prec - length;
right_prec = right_prec - length;
if (right_prec > 0) {
pad -= right_prec;
}
if (sign != '\0') {
pad--;
}
if (zero_fill) {
c = '0';
if (sign != '\0') {
(*putc)(sign);
res++;
sign = '\0';
}
} else {
c = ' ';
}
if (!pad_on_right) {
while (pad-- > 0) {
(*putc)(c);
res++;
}
}
if (sign != '\0') {
(*putc)(sign);
res++;
}
while (right_prec-- > 0) {
(*putc)('0');
res++;
}
while (length-- > 0) {
c = *cp++;
(*putc)(c);
res++;
}
if (pad_on_right) {
while (pad-- > 0) {
(*putc)(' ');
res++;
}
}
} else {
(*putc)(c);
res++;
}
}
return (res);
}
#endif // !ESP_ROM_HAS_VPRINTF_FUNC
#if CONFIG_IDF_TARGET_LINUX
// esp_rom_printf is already available from ROM. At the moment we only need this for LINUX.
int esp_rom_printf(const char *fmt, ...)
{
va_list list;
va_start(list, fmt);
int result = ets_vprintf(esp_rom_output_to_channels, fmt, list);
va_end(list);
return result;
}
#endif // CONFIG_IDF_TARGET_LINUX
int esp_rom_vprintf(const char *fmt, va_list ap)
{
return ets_vprintf(esp_rom_output_to_channels, fmt, ap);
}
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