1/*- 2 * Copyright (c) 1991, 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 --- 22 unchanged lines hidden (view full) --- 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35#if 0 36static const char sccsid[] = "@(#)genget.c 8.2 (Berkeley) 5/30/95"; 37#else 38static const char rcsid[] = |
39 "$FreeBSD: head/contrib/telnet/libtelnet/genget.c 81965 2001-08-20 12:28:40Z markm $"; |
40#endif 41#endif /* not lint */ 42 43 44#include <ctype.h> 45 46#define LOWER(x) (isupper(x) ? tolower(x) : (x)) 47/* 48 * The prefix function returns 0 if *s1 is not a prefix 49 * of *s2. If *s1 exactly matches *s2, the negative of 50 * the length is returned. If *s1 is a prefix of *s2, 51 * the length of *s1 is returned. 52 */ |
53int 54isprefix(char *s1, char *s2) |
55{ 56 char *os1; |
57 char c1, c2; |
58 59 if (*s1 == '\0') 60 return(-1); 61 os1 = s1; 62 c1 = *s1; 63 c2 = *s2; 64 while (LOWER(c1) == LOWER(c2)) { 65 if (c1 == '\0') 66 break; 67 c1 = *++s1; 68 c2 = *++s2; 69 } 70 return(*s1 ? 0 : (*s2 ? (s1 - os1) : (os1 - s1))); 71} 72 73static char *ambiguous; /* special return value for command routines */ 74 |
75char ** 76genget(char *name, char **table, int stlen) |
77{ |
78 char **c, **found; 79 int n; |
80 81 if (name == 0) 82 return 0; 83 84 found = 0; 85 for (c = table; *c != 0; c = (char **)((char *)c + stlen)) { 86 if ((n = isprefix(name, *c)) == 0) 87 continue; --- 4 unchanged lines hidden (view full) --- 92 found = c; 93 } 94 return(found); 95} 96 97/* 98 * Function call version of Ambiguous() 99 */ |
100int 101Ambiguous(char *s) |
102{ |
103 return((char **)s == &ambiguous); |
104} |