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Add vsnprintf

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@407 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2007-11-25 16:49:08 +00:00
parent 18e3cfd272
commit a019c26daa
3 changed files with 97 additions and 5 deletions
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7
include/stdio.h
View file

@ -126,9 +126,10 @@ EXTERN int sprintf(char *buf, const char *format, ...);
EXTERN int snprintf(char *buf, size_t size, const char *format, ...);
EXTERN int ungetc(int c, FILE *stream);
EXTERN int vprintf(const char *s, va_list ap);
EXTERN int vfprintf(FILE *stream, const char *s, va_list ap);
EXTERN int vsprintf(char *buf, const char *s, va_list ap);
EXTERN int vprintf(const char *format, va_list ap);
EXTERN int vfprintf(FILE *stream, const char *format, va_list ap);
EXTERN int vsprintf(char *buf, const char *format, va_list ap);
EXTERN int vsnprintf(char *buf, size_t size, const char *format, va_list ap);
/* POSIX-like File System Interfaces */

3
lib/Makefile
View file

@ -54,8 +54,7 @@ STRING_SRCS = lib_memset.c lib_memcpy.c lib_memcmp.c lib_memmove.c \
CTYPE_SRCS =
STDIO_SRCS = lib_printf.c lib_rawprintf.c lib_lowprintf.c lib_sprintf.c lib_snprintf.c \
lib_libsprintf.c lib_vsprintf.c lib_libvsprintf.c lib_memstream.c lib_lowstream.c \
lib_nullstream.c lib_sscanf.c
lib_libsprintf.c lib_vsprintf.c lib_vsnprintf.c lib_libvsprintf.c \ lib_memstream.c lib_lowstream.c lib_nullstream.c lib_sscanf.c
ifneq ($(CONFIG_NFILE_DESCRIPTORS),0)
STDIO_SRCS += lib_rawstream.c

92
lib/lib_vsnprintf.c Normal file
View file

@ -0,0 +1,92 @@
/************************************************************
* lib/lib_vsnprintf.c
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name Gregory Nutt nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************/
/************************************************************
* Included Files
************************************************************/
#include <stdio.h>
#include "lib_internal.h"
/************************************************************
* Definitions
************************************************************/
/************************************************************
* Private Type Declarations
************************************************************/
/************************************************************
* Private Function Prototypes
************************************************************/
/************************************************************
* Global Constant Data
************************************************************/
/************************************************************
* Global Variables
************************************************************/
/************************************************************
* Private Constant Data
************************************************************/
/************************************************************
* Private Variables
************************************************************/
/************************************************************
* Global Functions
************************************************************/
/************************************************************
* sprintf
************************************************************/
int vsnprintf(char *buf, size_t size, const char *format, va_list ap)
{
struct lib_memstream_s memstream;
int n;
/* Initialize a memory stream to write to the buffer */
lib_memstream(&memstream, buf, size);
/* Then let lib_vsprintf do the real work */
n = lib_vsprintf(&memstream.public, format, ap);
return n;
}