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Diffstat (limited to 'lib/libtelnet/genget.c')
| -rw-r--r-- | lib/libtelnet/genget.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/lib/libtelnet/genget.c b/lib/libtelnet/genget.c new file mode 100644 index 0000000..9d4e164 --- /dev/null +++ b/lib/libtelnet/genget.c @@ -0,0 +1,109 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> + +#ifdef __FBSDID +__FBSDID("$FreeBSD: src/crypto/telnet/libtelnet/genget.c,v 1.2.8.2 2002/04/13 10:59:07 markm Exp $"); +#endif + +#ifndef lint +#if 0 +static const char sccsid[] = "@(#)genget.c 8.2 (Berkeley) 5/30/95"; +#endif +#endif /* not lint */ + + +#include <ctype.h> + +#include "misc-proto.h" + +#define LOWER(x) (isupper(x) ? tolower(x) : (x)) +/* + * The prefix function returns 0 if *s1 is not a prefix + * of *s2. If *s1 exactly matches *s2, the negative of + * the length is returned. If *s1 is a prefix of *s2, + * the length of *s1 is returned. + */ +int +isprefix(char *s1, const char *s2) +{ + char *os1; + char c1, c2; + + if (*s1 == '\0') + return(-1); + os1 = s1; + c1 = *s1; + c2 = *s2; + while (LOWER(c1) == LOWER(c2)) { + if (c1 == '\0') + break; + c1 = *++s1; + c2 = *++s2; + } + return(*s1 ? 0 : (*s2 ? (s1 - os1) : (os1 - s1))); +} + +static char *ambiguous; /* special return value for command routines */ + +char ** +genget(char *name, char **table, int stlen) +{ + char **c, **found; + int n; + + if (name == 0) + return 0; + + found = 0; + for (c = table; *c != 0; c = (char **)((char *)c + stlen)) { + if ((n = isprefix(name, *c)) == 0) + continue; + if (n < 0) /* exact match */ + return(c); + if (found) + return(&ambiguous); + found = c; + } + return(found); +} + +/* + * Function call version of Ambiguous() + */ +int +Ambiguous(char **s) +{ + return(s == &ambiguous); +} |