1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
#include <cstdarg>
//#include <stdarg.h>
#include "mbed.h"
#include "mbed/xprintf.h"
#define STRING_STACK_LIMIT 120
// TODO
int __xprintf(const char* format, ...) { return 0; }
#if 0
/* mbed Serial */
Serial ser(UART_TX, UART_RX);
/* TODO: Need small implementation for embedded */
int xprintf(const char* format, ...)
{
/* copy from mbed/common/RawSerial.cpp */
std::va_list arg;
va_start(arg, format);
int len = vsnprintf(NULL, 0, format, arg);
if (len < STRING_STACK_LIMIT) {
char temp[STRING_STACK_LIMIT];
vsprintf(temp, format, arg);
ser.puts(temp);
} else {
char *temp = new char[len + 1];
vsprintf(temp, format, arg);
ser.puts(temp);
delete[] temp;
}
va_end(arg);
return len;
/* Fail: __builtin_va_arg_pack?
* https://gcc.gnu.org/onlinedocs/gcc-4.3.5/gcc/Constructing-Calls.html#Constructing-Calls
void *arg = __builtin_apply_args();
void *ret = __builtin_apply((void*)(&(ser.printf)), arg, 100);
__builtin_return(ret)
*/
/* Fail: varargs can not be passed to printf
//int r = ser.printf("test %i\r\n", 123);
va_list arg;
va_start(arg, format);
int r = ser.printf(format, arg);
va_end(arg);
return r;
*/
}
#endif
|
