From 9b3fbb2b439a717dda0eaa34cb455a9ce38532ef Mon Sep 17 00:00:00 2001 From: Simon South Date: Wed, 2 Oct 2019 10:55:07 -0400 Subject: [PATCH] tiny-printf: Support vsnprintf() Add a simple implementation of this function, to allow logging to be enabled in the SPL or TPL for systems that rely on the tiny printf() implementation. To keep the code size small, - The function is built only when logging is enabled, as it (currently) is not needed otherwise; and - Like the existing implementation of snprintf(), its buffer-size parameter is ignored. Signed-off-by: Simon South --- lib/tiny-printf.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/lib/tiny-printf.c b/lib/tiny-printf.c index ebef92f..62e6381 100644 --- a/lib/tiny-printf.c +++ b/lib/tiny-printf.c @@ -366,6 +366,22 @@ int sprintf(char *buf, const char *fmt, ...) return ret; } +#if CONFIG_IS_ENABLED(LOG) +/* Note that size is ignored */ +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); + *info.outstr = '\0'; + + return ret; +} +#endif + /* Note that size is ignored */ int snprintf(char *buf, size_t size, const char *fmt, ...) { -- 2.7.4