incubator-nuttx/libs/libc/obstack/lib_obstack_printf.c

65 lines
2.4 KiB
C

/****************************************************************************
* libs/libc/obstack/lib_obstack_printf.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <obstack.h>
#include <stdarg.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: obstack_printf
*
* Description:
* This is similar to the asprintf except it uses obstack to allocate
* string on. The characters are written onto the end of the currently
* growing object and terminated by null byte.
*
* This function is defined in stdio.h in GlibC. There is no definition
* that would be in stdio.h required for these here and thus it is easier
* to just keep these functions here as user has to include obstack anyway
* to get the full functionality.
*
* Input Parameters:
* h: pointer to the handle used to grow the object.
* fmt: format string with its format inputs followed.
*
* Returned Value:
* Number of characters added to the obstack excluding the null byte.
*
****************************************************************************/
int obstack_printf(FAR struct obstack *h, FAR const char *fmt, ...)
{
int res;
va_list ap;
va_start(ap, fmt);
res = obstack_vprintf(h, fmt, ap);
va_end(ap);
return res;
}