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libc/stream: Add support for lib_scanf

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This commit adds support for the `lib_scanf` function, which
is a stream-oriented version of the `scanf` function.

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao 2025-06-18 02:25:23 +08:00 • committed by Xiang Xiao
parent a3f8b55143
commit 4b8a738141
2 changed files with 26 additions and 1 deletions
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9
include/nuttx/streams.h
View file

@ -857,6 +857,13 @@ int lib_vsprintf_internal(FAR struct lib_outstream_s *stream,
int lib_vsprintf(FAR struct lib_outstream_s *stream, int lib_vsprintf(FAR struct lib_outstream_s *stream,
FAR const IPTR char *src, va_list ap) printf_like(2, 0); FAR const IPTR char *src, va_list ap) printf_like(2, 0);
/****************************************************************************
* Name: lib_scanf
****************************************************************************/
int lib_scanf(FAR struct lib_instream_s *stream, FAR int *lastc,
FAR const IPTR char *fmt, ...) scanf_like(3, 4);
/**************************************************************************** /****************************************************************************
* Name: lib_vscanf * Name: lib_vscanf
* *
@ -867,7 +874,7 @@ int lib_vsprintf(FAR struct lib_outstream_s *stream,
****************************************************************************/ ****************************************************************************/
int lib_vscanf(FAR struct lib_instream_s *stream, FAR int *lastc, int lib_vscanf(FAR struct lib_instream_s *stream, FAR int *lastc,
FAR const IPTR char *src, va_list ap) scanf_like(3, 0); FAR const IPTR char *fmt, va_list ap) scanf_like(3, 0);
/**************************************************************************** /****************************************************************************
* Name: lib_bscanf * Name: lib_bscanf

18
libs/libc/stream/lib_libvscanf.c
View file

@ -1279,6 +1279,24 @@ int lib_vscanf(FAR struct lib_instream_s *stream, FAR int *lastc,
return ret; return ret;
} }
/****************************************************************************
* Name: lib_scanf
****************************************************************************/
int lib_scanf(FAR struct lib_instream_s *stream, FAR int *lastc,
FAR const IPTR char *fmt, ...)
{
va_list ap;
int n;
/* Let lib_vscanf do the real work */
va_start(ap, fmt);
n = lib_vscanf(stream, lastc, fmt, ap);
va_end(ap);
return n;
}
/**************************************************************************** /****************************************************************************
* Name: lib_bscanf * Name: lib_bscanf
* *