65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/****************************************************************************
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* libs/libc/stdio/lib_asprintf.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <stdarg.h>
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#include "libc.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: asprintf
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*
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* Description:
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* This function is similar to sprintf, except that it dynamically
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* allocates a string (as with malloc) to hold the output, instead of
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* putting the output in a buffer you allocate in advance. The ptr
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* argument should be the address of a char * object, and a successful
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* call to asprintf stores a pointer to the newly allocated string at that
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* location.
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*
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* Returned Value:
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* The returned value is the number of characters allocated for the buffer,
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* or less than zero if an error occurred. Usually this means that the
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* buffer could not be allocated.
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*
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****************************************************************************/
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int asprintf(FAR char **ptr, FAR const IPTR char *fmt, ...)
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{
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va_list ap;
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int ret;
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/* Let vasprintf do all of the work */
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va_start(ap, fmt);
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ret = vasprintf(ptr, fmt, ap);
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va_end(ap);
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return ret;
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}
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