dbm/src/strerror.c

   1 /*
   2  * Copyright (c) 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. ***REMOVED*** - see
  14  *    ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
  15  * 4. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #if defined(LIBC_SCCS) && !defined(lint)
  33 static char sccsid[] = "@(#)strerror.c  8.1 (Berkeley) 6/4/93";
  34 #endif /* LIBC_SCCS and not lint */
  35
  36 #include "watcomfx.h"
  37
  38 #include <string.h>
  39
  40 #ifdef _DLL
  41 #define sys_nerr    (*_sys_nerr_dll)
  42 #endif
  43
  44 #ifndef HAVE_STRERROR
  45 #ifndef _AFXDLL
  46 char *
  47 strerror(num)
  48         int num;
  49 {
  50         extern int sys_nerr;
  51         extern char *sys_errlist[];
  52 #define UPREFIX "Unknown error: "
  53         static char ebuf[40] = UPREFIX;         /* 64-bit number + slop */
  54         register unsigned int errnum;
  55         register char *p, *t;
  56         char tmp[40];
  57
  58         errnum = num;                           /* convert to unsigned */
  59         if (errnum < sys_nerr)
  60                 return(sys_errlist[errnum]);
  61
  62         /* Do this by hand, so we don't include stdio(3). */
  63         t = tmp;
  64         do {
  65                 *t++ = "0123456789"[errnum % 10];
  66         } while (errnum /= 10);
  67         for (p = ebuf + sizeof(UPREFIX) - 1;;) {
  68                 *p++ = *--t;
  69                 if (t <= tmp)
  70                         break;
  71         }
  72         return(ebuf);
  73 }
  74
  75 #endif
  76 #endif /* !HAVE_STRERROR */