1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)iso_addr.c 8.1 (Berkeley) 06/04/93"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/types.h> 13 #include <netiso/iso.h> 14 #include <string.h> 15 16 /* States*/ 17 #define VIRGIN 0 18 #define GOTONE 1 19 #define GOTTWO 2 20 /* Inputs */ 21 #define DIGIT (4*0) 22 #define END (4*1) 23 #define DELIM (4*2) 24 25 struct iso_addr * 26 iso_addr(addr) 27 register const char *addr; 28 { 29 static struct iso_addr out_addr; 30 register char *cp = out_addr.isoa_genaddr; 31 char *cplim = cp + sizeof(out_addr.isoa_genaddr); 32 register int byte = 0, state = VIRGIN, new; 33 34 bzero((char *)&out_addr, sizeof(out_addr)); 35 do { 36 if ((*addr >= '0') && (*addr <= '9')) { 37 new = *addr - '0'; 38 } else if ((*addr >= 'a') && (*addr <= 'f')) { 39 new = *addr - 'a' + 10; 40 } else if ((*addr >= 'A') && (*addr <= 'F')) { 41 new = *addr - 'A' + 10; 42 } else if (*addr == 0) 43 state |= END; 44 else 45 state |= DELIM; 46 addr++; 47 switch (state /* | INPUT */) { 48 case GOTTWO | DIGIT: 49 *cp++ = byte; /*FALLTHROUGH*/ 50 case VIRGIN | DIGIT: 51 state = GOTONE; byte = new; continue; 52 case GOTONE | DIGIT: 53 state = GOTTWO; byte = new + (byte << 4); continue; 54 default: /* | DELIM */ 55 state = VIRGIN; *cp++ = byte; byte = 0; continue; 56 case GOTONE | END: 57 case GOTTWO | END: 58 *cp++ = byte; /* FALLTHROUGH */ 59 case VIRGIN | END: 60 break; 61 } 62 break; 63 } while (cp < cplim); 64 out_addr.isoa_len = cp - out_addr.isoa_genaddr; 65 return (&out_addr); 66 } 67 static char hexlist[] = "0123456789abcdef"; 68 69 char * 70 iso_ntoa(isoa) 71 const struct iso_addr *isoa; 72 { 73 static char obuf[64]; 74 register char *out = obuf; 75 register int i; 76 register u_char *in = (u_char *)isoa->isoa_genaddr; 77 u_char *inlim = in + isoa->isoa_len; 78 79 out[1] = 0; 80 while (in < inlim) { 81 i = *in++; 82 *out++ = '.'; 83 if (i > 0xf) { 84 out[1] = hexlist[i & 0xf]; 85 i >>= 4; 86 out[0] = hexlist[i]; 87 out += 2; 88 } else 89 *out++ = hexlist[i]; 90 } 91 *out = 0; 92 return(obuf + 1); 93 } 94