84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
/*
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* Copyright (c) 2009, Simon Berg
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* All rights reserved.
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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 the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software 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 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include <stdio.h>
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#include <strformat.h>
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#include <string.h>
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/*---------------------------------------------------------------------------*/
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struct fmt_buffer {
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char *pos;
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size_t left;
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};
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/*---------------------------------------------------------------------------*/
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static strformat_result
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buffer_str(void *user_data, const char *data, unsigned int len)
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{
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struct fmt_buffer *buffer = (struct fmt_buffer *)user_data;
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if(len >= buffer->left) {
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len = buffer->left;
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len--;
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}
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memcpy(buffer->pos, data, len);
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buffer->pos += len;
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buffer->left -= len;
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return STRFORMAT_OK;
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}
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/*---------------------------------------------------------------------------*/
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int
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snprintf(char *str, size_t size, const char *format, ...)
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{
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int res;
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va_list ap;
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va_start(ap, format);
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res = vsnprintf(str, size, format, ap);
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va_end(ap);
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return res;
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}
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/*---------------------------------------------------------------------------*/
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int
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vsnprintf(char *str, size_t size, const char *format, va_list ap)
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{
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struct fmt_buffer buffer;
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strformat_context_t ctxt;
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int res;
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ctxt.write_str = buffer_str;
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ctxt.user_data = &buffer;
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buffer.pos = str;
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buffer.left = size;
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res = format_str_v(&ctxt, format, ap);
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*buffer.pos = '\0';
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return res;
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}
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/*---------------------------------------------------------------------------*/
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