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Annotation of 43BSDReno/lib/libc/net/ns_ntoa.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1986 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #if defined(LIBC_SCCS) && !defined(lint)
                     21: static char sccsid[] = "@(#)ns_ntoa.c  6.5 (Berkeley) 6/1/90";
                     22: #endif /* LIBC_SCCS and not lint */
                     23: 
                     24: #include <sys/types.h>
                     25: #include <netns/ns.h>
                     26: 
                     27: char *
                     28: ns_ntoa(addr)
                     29: struct ns_addr addr;
                     30: {
                     31:        static char obuf[40];
                     32:        char *spectHex();
                     33:        union { union ns_net net_e; u_long long_e; } net;
                     34:        u_short port = htons(addr.x_port);
                     35:        register char *cp;
                     36:        char *cp2;
                     37:        register u_char *up = addr.x_host.c_host;
                     38:        u_char *uplim = up + 6;
                     39: 
                     40:        net.net_e = addr.x_net;
                     41:        sprintf(obuf, "%lx", ntohl(net.long_e));
                     42:        cp = spectHex(obuf);
                     43:        cp2 = cp + 1;
                     44:        while (*up==0 && up < uplim) up++;
                     45:        if (up == uplim) {
                     46:                if (port) {
                     47:                        sprintf(cp, ".0");
                     48:                        cp += 2;
                     49:                }
                     50:        } else {
                     51:                sprintf(cp, ".%x", *up++);
                     52:                while (up < uplim) {
                     53:                        while (*cp) cp++;
                     54:                        sprintf(cp, "%02x", *up++);
                     55:                }
                     56:                cp = spectHex(cp2);
                     57:        }
                     58:        if (port) {
                     59:                sprintf(cp, ".%x", port);
                     60:                spectHex(cp + 1);
                     61:        }
                     62:        return (obuf);
                     63: }
                     64: 
                     65: static char *
                     66: spectHex(p0)
                     67: char *p0;
                     68: {
                     69:        int ok = 0;
                     70:        int nonzero = 0;
                     71:        register char *p = p0;
                     72:        for (; *p; p++) switch (*p) {
                     73: 
                     74:        case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
                     75:                *p += ('A' - 'a');
                     76:                /* fall into . . . */
                     77:        case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
                     78:                ok = 1;
                     79:        case '1': case '2': case '3': case '4': case '5':
                     80:        case '6': case '7': case '8': case '9':
                     81:                nonzero = 1;
                     82:        }
                     83:        if (nonzero && !ok) { *p++ = 'H'; *p = 0; }
                     84:        return (p);
                     85: }

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