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74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996-2002
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* Sleepycat Software. All rights reserved.
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*/
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#include "db_config.h"
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#ifndef lint
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static const char revid[] = "$Id: snprintf.c,v 11.10 2002/01/11 15:51:28 bostic Exp $";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <stdio.h>
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#endif
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#include "db_int.h"
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/*
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* snprintf --
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* Bounded version of sprintf.
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*
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* PUBLIC: #ifndef HAVE_SNPRINTF
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* PUBLIC: int snprintf __P((char *, size_t, const char *, ...));
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* PUBLIC: #endif
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*/
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#ifndef HAVE_SNPRINTF
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int
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#ifdef __STDC__
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snprintf(char *str, size_t n, const char *fmt, ...)
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#else
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snprintf(str, n, fmt, va_alist)
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char *str;
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size_t n;
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const char *fmt;
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va_dcl
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#endif
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{
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static int ret_charpnt = -1;
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va_list ap;
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int len;
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COMPQUIET(n, 0);
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/*
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* Some old versions of sprintf return a pointer to the first argument
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* instead of a character count. Assume the return value of snprintf,
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* vsprintf, etc. will be the same as sprintf, and check the easy one.
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*
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* We do this test at run-time because it's not a test we can do in a
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* cross-compilation environment.
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*/
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if (ret_charpnt == -1) {
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char buf[10];
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ret_charpnt =
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sprintf(buf, "123") != 3 ||
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sprintf(buf, "123456789") != 9 ||
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sprintf(buf, "1234") != 4;
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}
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#ifdef __STDC__
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va_start(ap, fmt);
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#else
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va_start(ap);
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#endif
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len = vsprintf(str, fmt, ap);
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va_end(ap);
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return (ret_charpnt ? (int)strlen(str) : len);
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}
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#endif
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