116 lines
3.0 KiB
C
116 lines
3.0 KiB
C
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/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/*
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FUNCTION
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<<vsniprintf>>---write formatted output (integer only)
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INDEX
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vsniprintf
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ANSI_SYNOPSIS
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#include <stdio.h>
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int vsniprintf(char *<[str]>, size_t <[size]>, const char *<[fmt]>, va_list <[list]>);
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TRAD_SYNOPSIS
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#include <stdio.h>
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int vsnprintf(<[str]>, <[size]>, <[fmt]>, <[list]>)
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char *<[str]>;
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size_t <[size]>;
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char *<[fmt]>;
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va_list <[list]>;
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DESCRIPTION
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<<vsniprintf>> is a restricted version of <<vsnprintf>>: it has the same
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arguments and behavior, save that it cannot perform any floating-point
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formatting: the <<f>>, <<g>>, <<G>>, <<e>>, and <<F>> type specifiers
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are not recognized.
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RETURNS
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<<vsniprintf>> returns the number of bytes in the output string,
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save that the concluding <<NULL>> is not counted.
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<<vsniprintf>> returns when the end of the format string is
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encountered.
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PORTABILITY
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<<vsniprintf>> is not required by ANSI C.
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Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
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<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "%W% (Berkeley) %G%";
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#endif /* LIBC_SCCS and not lint */
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#include <_ansi.h>
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#include <reent.h>
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#include <stdio.h>
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#include <limits.h>
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#ifdef _HAVE_STDC
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#ifndef _REENT_ONLY
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int
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_DEFUN(vsniprintf, (str, size, fmt, ap),
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char *str _AND
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size_t size _AND
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_CONST char *fmt _AND
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va_list ap)
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{
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int ret;
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FILE f;
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f._flags = __SWR | __SSTR;
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f._bf._base = f._p = (unsigned char *) str;
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f._bf._size = f._w = (size > 0 ? size - 1 : 0);
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f._file = -1; /* No file. */
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ret = _vfiprintf_r (_REENT, &f, fmt, ap);
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if (size > 0)
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*f._p = 0;
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return ret;
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}
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#endif /* !_REENT_ONLY */
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int
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_DEFUN(_vsniprintf_r, (ptr, str, size, fmt, ap),
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struct _reent *ptr _AND
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char *str _AND
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size_t size _AND
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_CONST char *fmt _AND
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va_list ap)
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{
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int ret;
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FILE f;
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f._flags = __SWR | __SSTR;
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f._bf._base = f._p = (unsigned char *) str;
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f._bf._size = f._w = (size > 0 ? size - 1 : 0);
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f._file = -1; /* No file. */
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ret = _vfiprintf_r (ptr, &f, fmt, ap);
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if (size > 0)
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*f._p = 0;
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return ret;
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}
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