1 |
|
|
/* $OpenBSD: genget.c,v 1.5 2014/07/20 10:32:23 jsg Exp $ */ |
2 |
|
|
|
3 |
|
|
/*- |
4 |
|
|
* Copyright (c) 1991, 1993 |
5 |
|
|
* The Regents of the University of California. All rights reserved. |
6 |
|
|
* |
7 |
|
|
* Redistribution and use in source and binary forms, with or without |
8 |
|
|
* modification, are permitted provided that the following conditions |
9 |
|
|
* are met: |
10 |
|
|
* 1. Redistributions of source code must retain the above copyright |
11 |
|
|
* notice, this list of conditions and the following disclaimer. |
12 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
13 |
|
|
* notice, this list of conditions and the following disclaimer in the |
14 |
|
|
* documentation and/or other materials provided with the distribution. |
15 |
|
|
* 3. 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 |
|
|
/* $KTH: genget.c,v 1.6 1997/05/04 09:01:34 assar Exp $ */ |
33 |
|
|
|
34 |
|
|
#include <ctype.h> |
35 |
|
|
#include "telnet_locl.h" |
36 |
|
|
|
37 |
|
|
/* |
38 |
|
|
* The prefix function returns 0 if *s1 is not a prefix |
39 |
|
|
* of *s2. If *s1 exactly matches *s2, the negative of |
40 |
|
|
* the length is returned. If *s1 is a prefix of *s2, |
41 |
|
|
* the length of *s1 is returned. |
42 |
|
|
*/ |
43 |
|
|
int |
44 |
|
|
isprefix(char *s1, char *s2) |
45 |
|
|
{ |
46 |
|
|
char *os1; |
47 |
|
|
char c1, c2; |
48 |
|
|
|
49 |
|
|
if (*s1 == '\0') |
50 |
|
|
return(-1); |
51 |
|
|
os1 = s1; |
52 |
|
|
c1 = *s1; |
53 |
|
|
c2 = *s2; |
54 |
|
|
while (tolower((unsigned char)c1) == tolower((unsigned char)c2)) { |
55 |
|
|
if (c1 == '\0') |
56 |
|
|
break; |
57 |
|
|
c1 = *++s1; |
58 |
|
|
c2 = *++s2; |
59 |
|
|
} |
60 |
|
|
return(*s1 ? 0 : (*s2 ? (s1 - os1) : (os1 - s1))); |
61 |
|
|
} |
62 |
|
|
|
63 |
|
|
static char *ambiguous; /* special return value for command routines */ |
64 |
|
|
|
65 |
|
|
char ** |
66 |
|
|
genget(char *name, char **table, int stlen) |
67 |
|
|
/* name to match */ |
68 |
|
|
/* name entry in table */ |
69 |
|
|
|
70 |
|
|
{ |
71 |
|
|
char **c, **found; |
72 |
|
|
int n; |
73 |
|
|
|
74 |
|
|
if (name == NULL) |
75 |
|
|
return (NULL); |
76 |
|
|
|
77 |
|
|
found = NULL; |
78 |
|
|
for (c = table; *c != NULL; c = (char **)((char *)c + stlen)) { |
79 |
|
|
if ((n = isprefix(name, *c)) == 0) |
80 |
|
|
continue; |
81 |
|
|
if (n < 0) /* exact match */ |
82 |
|
|
return(c); |
83 |
|
|
if (found) |
84 |
|
|
return(&ambiguous); |
85 |
|
|
found = c; |
86 |
|
|
} |
87 |
|
|
return(found); |
88 |
|
|
} |
89 |
|
|
|
90 |
|
|
/* |
91 |
|
|
* Function call version of Ambiguous() |
92 |
|
|
*/ |
93 |
|
|
int |
94 |
|
|
Ambiguous(void *s) |
95 |
|
|
{ |
96 |
|
|
return((char **)s == &ambiguous); |
97 |
|
|
} |