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378e50d2ab
TMP_MAX value was off by one. git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15029 87f5fb63-7c3d-0410-a384-fd976d0f7a62
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/*
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* $Id: stdio_tmpnam.c,v 1.5 2005-09-04 11:27:59 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 _STDIO_HEADERS_H
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#include "stdio_headers.h"
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#endif /* _STDIO_HEADERS_H */
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#ifndef _STDLIB_HEADERS_H
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#include "stdlib_headers.h"
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#endif /* _STDLIB_HEADERS_H */
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/****************************************************************************/
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char *
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tmpnam(char *buf)
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{
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static char local_buffer[L_tmpnam];
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static unsigned long counter;
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APTR old_window_pointer;
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unsigned long c;
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char * result = NULL; /* ZZZ compiler claims that this assignment is unnecessary. */
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BPTR lock;
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int i;
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ENTER();
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if(__check_abort_enabled)
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__check_abort();
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/* If no user-supplied buffer is available, use the local one. */
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if(buf == NULL)
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buf = local_buffer;
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while(TRUE)
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{
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if(__check_abort_enabled)
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__check_abort();
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c = counter;
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counter = (counter + 1) % TMP_MAX;
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/* Build another temporary file name, which begins with the
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letters 'tmp' followed by an octal number. */
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strcpy(buf,"tmp");
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/* There's room for L_tmpnam - 4 digits, which for
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L_tmpnam == 10 leaves room for 6 * 3 bits. */
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for(i = 3 ; i < L_tmpnam-1 ; i++)
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{
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buf[i] = '0' + (c % 8);
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c = (c / 8);
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}
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buf[i] = '\0';
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D(("checking if '%s' exists",buf));
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/* Turn off DOS error requesters. */
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old_window_pointer = __set_process_window((APTR)-1);
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/* Does this object exist already? */
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PROFILE_OFF();
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lock = Lock(buf,SHARED_LOCK);
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PROFILE_ON();
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/* Restore DOS requesters. */
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__set_process_window(old_window_pointer);
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if(lock == ZERO)
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{
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/* If the object does not exist yet then we
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are finished. */
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if(IoErr() == ERROR_OBJECT_NOT_FOUND)
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result = buf;
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else
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__set_errno(__translate_io_error_to_errno(IoErr()));
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break;
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}
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/* OK, so it exists already. Start over... */
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PROFILE_OFF();
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UnLock(lock);
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PROFILE_ON();
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}
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SHOWSTRING(result);
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RETURN(result);
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return(result);
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}
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