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sys/fmt: print(): use fflush(); stdio_write() vs. fwrite()

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This commit is contained in:
Kaspar Schleiser 2023-02-06 10:37:29 +01:00
parent f341ad6c9c
commit f31d5a93b5
1 changed files with 16 additions and 16 deletions
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32
sys/fmt/fmt.c
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@ -27,6 +27,7 @@
#include "kernel_defines.h"
#include "fmt.h"
#include "stdio_base.h"
static const char _hex_chars[16] = "0123456789ABCDEF";
@ -506,25 +507,24 @@ uint32_t scn_u32_hex(const char *str, size_t n)
return res;
}
/* native gets special treatment as native's stdio code is ... special.
* And when not building for RIOT, there's no `stdio_write()`.
* In those cases, just defer to `printf()`.
*/
#if IS_USED(MODULE_STDIO_NATIVE) || !defined(RIOT_VERSION)
void print(const char *s, size_t n)
{
if (IS_USED(MODULE_STDIO_NATIVE)) {
/* native gets special treatment as native's stdio code is ...
* special */
printf("%.*s", (int)n, s);
return;
}
while (n > 0) {
ssize_t written;
written = fwrite(s, 1, n, stdout);
if (written < 0) {
break;
}
n -= written;
s += written;
}
printf("%.*s", (int)n, s);
}
#else
void print(const char *s, size_t n)
{
/* flush the libc's output buffer so output is not intermingled. */
fflush(stdout);
stdio_write(s, n);
}
#endif
void print_u32_dec(uint32_t val)
{