Add vsnprintf
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@407 7fd9a85b-ad96-42d3-883c-3090e2eb8679
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patacongo
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@ -126,9 +126,10 @@ EXTERN int sprintf(char *buf, const char *format, ...);
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EXTERN int snprintf(char *buf, size_t size, const char *format, ...);
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EXTERN int ungetc(int c, FILE *stream);
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EXTERN int vprintf(const char *s, va_list ap);
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EXTERN int vfprintf(FILE *stream, const char *s, va_list ap);
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EXTERN int vsprintf(char *buf, const char *s, va_list ap);
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EXTERN int vprintf(const char *format, va_list ap);
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EXTERN int vfprintf(FILE *stream, const char *format, va_list ap);
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EXTERN int vsprintf(char *buf, const char *format, va_list ap);
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EXTERN int vsnprintf(char *buf, size_t size, const char *format, va_list ap);
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/* POSIX-like File System Interfaces */
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@ -54,8 +54,7 @@ STRING_SRCS = lib_memset.c lib_memcpy.c lib_memcmp.c lib_memmove.c \
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CTYPE_SRCS =
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STDIO_SRCS = lib_printf.c lib_rawprintf.c lib_lowprintf.c lib_sprintf.c lib_snprintf.c \
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lib_libsprintf.c lib_vsprintf.c lib_libvsprintf.c lib_memstream.c lib_lowstream.c \
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lib_nullstream.c lib_sscanf.c
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lib_libsprintf.c lib_vsprintf.c lib_vsnprintf.c lib_libvsprintf.c \ lib_memstream.c lib_lowstream.c lib_nullstream.c lib_sscanf.c
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ifneq ($(CONFIG_NFILE_DESCRIPTORS),0)
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STDIO_SRCS += lib_rawstream.c
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@ -0,0 +1,92 @@
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/************************************************************
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* lib/lib_vsnprintf.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************/
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/************************************************************
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* Included Files
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************************************************************/
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#include <stdio.h>
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#include "lib_internal.h"
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/************************************************************
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* Definitions
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************************************************************/
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/************************************************************
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* Private Type Declarations
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************************************************************/
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/************************************************************
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* Private Function Prototypes
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************************************************************/
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/************************************************************
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* Global Constant Data
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************************************************************/
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/************************************************************
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* Global Variables
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************************************************************/
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/************************************************************
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* Private Constant Data
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************************************************************/
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/************************************************************
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* Private Variables
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************************************************************/
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/************************************************************
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* Global Functions
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************************************************************/
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/************************************************************
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* sprintf
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************************************************************/
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int vsnprintf(char *buf, size_t size, const char *format, va_list ap)
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{
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struct lib_memstream_s memstream;
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int n;
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/* Initialize a memory stream to write to the buffer */
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lib_memstream(&memstream, buf, size);
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/* Then let lib_vsprintf do the real work */
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n = lib_vsprintf(&memstream.public, format, ap);
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return n;
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}
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