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circuitpython/lib/utils/stdout_helpers.c

36 lines
976 B

#include <string.h>
#include <unistd.h>
#include "py/mpconfig.h"
#include "py/mphal.h"
/*
* Extra stdout functions
* These can be either optimized for a particular port, or reference
* implementation below can be used.
*/
// Send "cooked" string of given length, where every occurrence of
// LF character is replaced with CR LF.
void mp_hal_stdout_tx_strn_cooked(const char *str, size_t len) {
bool last_cr = false;
while (len > 0) {
size_t i = 0;
if (str[0] == '\n' && !last_cr) {
mp_hal_stdout_tx_strn("\r", 1);
i = 1;
}
// Lump all characters on the next line together.
while((last_cr || str[i] != '\n') && i < len) {
last_cr = str[i] == '\r';
i++;
}
mp_hal_stdout_tx_strn(str, i);
str = &str[i];
len -= i;
}
}
// Send zero-terminated string
void mp_hal_stdout_tx_str(const char *str) {
mp_hal_stdout_tx_strn(str, strlen(str));
}