strerror.c
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上传日期:2022-05-23
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文件大小:3k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1997-2002
- * Sleepycat Software. All rights reserved.
- */
- /*
- * Copyright (c) 1988, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: strerror.c,v 11.6 2002/01/11 15:51:29 bostic Exp $";
- #endif /* not lint */
- /*
- * strerror --
- * Return the string associated with an errno.
- *
- * PUBLIC: #ifndef HAVE_STRERROR
- * PUBLIC: char *strerror __P((int));
- * PUBLIC: #endif
- */
- char *
- strerror(num)
- int num;
- {
- extern int sys_nerr;
- extern char *sys_errlist[];
- #undef UPREFIX
- #define UPREFIX "Unknown error: "
- static char ebuf[40] = UPREFIX; /* 64-bit number + slop */
- int errnum;
- char *p, *t, tmp[40];
- errnum = num; /* convert to unsigned */
- if (errnum < sys_nerr)
- return(sys_errlist[errnum]);
- /* Do this by hand, so we don't include stdio(3). */
- t = tmp;
- do {
- *t++ = "0123456789"[errnum % 10];
- } while (errnum /= 10);
- for (p = ebuf + sizeof(UPREFIX) - 1;;) {
- *p++ = *--t;
- if (t <= tmp)
- break;
- }
- return(ebuf);
- }