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tiny-printf: Correct return values

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The sprintf() etc. functions are supposed to return the length of the
string written, but do not. Fix this by checking the amount of buffer
space used.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2024-09-20 09:24:29 +02:00 • committed by Tom Rini
parent eb08abc293
commit e2d96ac9ee
1 changed files with 6 additions and 9 deletions
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15
lib/tiny-printf.c
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@ -365,16 +365,15 @@ int sprintf(char *buf, const char *fmt, ...)
{
struct printf_info info;
va_list va;
int ret;
va_start(va, fmt);
info.outstr = buf;
info.putc = putc_outstr;
ret = _vprintf(&info, fmt, va);
_vprintf(&info, fmt, va);
va_end(va);
*info.outstr = '\0';
return ret;
return info.outstr - buf;
}
#if CONFIG_IS_ENABLED(LOG)
@ -382,14 +381,13 @@ int sprintf(char *buf, const char *fmt, ...)
int vsnprintf(char *buf, size_t size, const char *fmt, va_list va)
{
struct printf_info info;
int ret;
info.outstr = buf;
info.putc = putc_outstr;
ret = _vprintf(&info, fmt, va);
_vprintf(&info, fmt, va);
*info.outstr = '\0';
return ret;
return info.outstr - buf;
}
#endif
@ -398,16 +396,15 @@ int snprintf(char *buf, size_t size, const char *fmt, ...)
{
struct printf_info info;
va_list va;
int ret;
va_start(va, fmt);
info.outstr = buf;
info.putc = putc_outstr;
ret = _vprintf(&info, fmt, va);
_vprintf(&info, fmt, va);
va_end(va);
*info.outstr = '\0';
return ret;
return info.outstr - buf;
}
void print_grouped_ull(unsigned long long int_val, int digits)