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Annotation of prex-old/usr/lib/libc/string/strerror.c, Revision 1.1.1.1

1.1       nbrk        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. Neither the name of the University nor the names of its contributors
                     14:  *    may be used to endorse or promote products derived from this software
                     15:  *    without specific prior written permission.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  */
                     29:
                     30: #include <string.h>
                     31:
                     32: char *
                     33: strerror(num)
                     34:        int num;
                     35: {
                     36:        extern const int sys_nerr;
                     37:        extern const char *sys_errlist[];
                     38: #define        UPREFIX "Unknown error: "
                     39:        static char ebuf[40] = UPREFIX;         /* 64-bit number + slop */
                     40:        unsigned int errnum;
                     41:        char *p, *t;
                     42:        char tmp[40];
                     43:
                     44:        errnum = num;                           /* convert to unsigned */
                     45:        if (errnum < (unsigned int)sys_nerr)
                     46:                return((char *)sys_errlist[errnum]);
                     47:
                     48:        /* Do this by hand, so we don't include stdio(3). */
                     49:        t = tmp;
                     50:        do {
                     51:                *t++ = "0123456789"[errnum % 10];
                     52:        } while (errnum /= 10);
                     53:        for (p = ebuf + sizeof(UPREFIX) - 1;;) {
                     54:                *p++ = *--t;
                     55:                if (t <= tmp)
                     56:                        break;
                     57:        }
                     58:        return(ebuf);
                     59: }