98 lines
3.3 KiB
C
98 lines
3.3 KiB
C
/****************************************************************************
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* libs/libc/obstack/lib_obstack_vprintf.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 <obstack.h>
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#include <assert.h>
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#include <nuttx/streams.h>
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct obstack_stream
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{
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struct lib_outstream_s public;
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FAR struct obstack *h;
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static int obstack_puts(FAR struct lib_outstream_s *this,
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FAR const void *buf, int len)
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{
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FAR struct obstack_stream *mthis = (FAR struct obstack_stream *)this;
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DEBUGASSERT(this);
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obstack_grow(mthis->h, buf, len);
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return len;
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}
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static void obstack_putc(FAR struct lib_outstream_s *this, int ch)
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{
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char tmp = ch;
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obstack_puts(this, &tmp, 1);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: obstack_vprintf
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*
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* Description:
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* This is similar to the vasprintf except it uses obstack to allocate
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* string on. The characters are written onto the end of the currently
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* growing object and terminated by null byte.
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*
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* The same remarks are applied here as for obstack_printf regarding the
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* definition location in GlibC.
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*
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* Input Parameters:
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* h: pointer to the handle used to grow the object.
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* fmt: format string
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* ap: format string input as a variable argument list
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*
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* Returned Value:
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* Number of characters added to the obstack excluding the null byte.
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*
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****************************************************************************/
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int obstack_vprintf(FAR struct obstack *h, FAR const char *fmt, va_list ap)
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{
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struct obstack_stream outstream;
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outstream.public.put = obstack_putc;
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outstream.public.puts = obstack_puts;
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outstream.public.flush = lib_noflush;
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outstream.public.nput = 0;
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outstream.h = h;
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return lib_vsprintf(&outstream.public, fmt, ap);
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}
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