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984c6729c1
git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14789 87f5fb63-7c3d-0410-a384-fd976d0f7a62
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*
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* $Id: stdio_vsnprintf.c,v 1.3 2005-01-02 09:07:08 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2005 by Olaf Barthel <olsen@sourcery.han.de>
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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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* - 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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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, 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 OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _STDLIB_NULL_POINTER_CHECK_H
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#include "stdlib_null_pointer_check.h"
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#endif /* _STDLIB_NULL_POINTER_CHECK_H */
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/****************************************************************************/
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#ifndef _STDIO_HEADERS_H
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#include "stdio_headers.h"
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#endif /* _STDIO_HEADERS_H */
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/****************************************************************************/
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/* The following is not part of the ISO 'C' (1994) standard. */
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/****************************************************************************/
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int
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vsnprintf(char *buffer,size_t size,const char *format,va_list arg)
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{
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struct iob string_iob;
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int result = EOF;
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char local_buffer[32];
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ENTER();
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SHOWPOINTER(buffer);
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SHOWVALUE(size);
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SHOWSTRING(format);
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SHOWPOINTER(arg);
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assert( format != NULL && arg != NULL && (int)size >= 0 );
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#if defined(CHECK_FOR_NULL_POINTERS)
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{
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if(format == NULL || (buffer == NULL && size > 0))
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{
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SHOWMSG("invalid parameters");
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errno = EFAULT;
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goto out;
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}
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}
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#endif /* CHECK_FOR_NULL_POINTERS */
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if(__check_abort_enabled)
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__check_abort();
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__initialize_iob(&string_iob,(HOOKFUNC)__vsnprintf_hook_entry,
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NULL,
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local_buffer,sizeof(local_buffer),
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-1,
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-1,
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IOBF_IN_USE | IOBF_WRITE | IOBF_NO_NUL | IOBF_BUFFER_MODE_NONE | IOBF_INTERNAL);
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/* Store up to 'size-1' characters in the output buffer. This
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does not include the terminating NUL character, which we
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will add later. */
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string_iob.iob_String = (STRPTR)buffer;
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string_iob.iob_StringSize = (size > 0) ? (size - 1) : 0;
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/* We will return the number of characters that would have been
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stored if there had been enough room. */
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result = vfprintf((FILE *)&string_iob,format,arg);
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/* Figure out how many characters were stored. Fewer than
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the output buffer size allows for may have been written
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to the buffer. The string needs to be terminated with a
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NUL byte behind the last character stored. */
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if(size > 0)
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{
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assert( string_iob.iob_StringPosition >= 0 );
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assert( string_iob.iob_StringPosition+1 <= size );
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buffer[string_iob.iob_StringPosition] = '\0';
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SHOWSTRING(buffer);
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}
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else
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{
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SHOWMSG("output buffer is empty");
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}
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out:
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RETURN(result);
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return(result);
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}
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