mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Kenneth Almquist.
|
|
*
|
|
* 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.
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)mystring.c 8.2 (Berkeley) 5/4/95";
|
|
#endif
|
|
#endif /* not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* String functions.
|
|
*
|
|
* equal(s1, s2) Return true if strings are equal.
|
|
* scopy(from, to) Copy a string.
|
|
* scopyn(from, to, n) Like scopy, but checks for overflow.
|
|
* number(s) Convert a string of digits to an integer.
|
|
* is_number(s) Return true if s is a string of digits.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include "shell.h"
|
|
#include "syntax.h"
|
|
#include "error.h"
|
|
#include "mystring.h"
|
|
|
|
|
|
char nullstr[1]; /* zero length string */
|
|
|
|
/*
|
|
* equal - #defined in mystring.h
|
|
*/
|
|
|
|
/*
|
|
* scopy - #defined in mystring.h
|
|
*/
|
|
|
|
|
|
/*
|
|
* scopyn - copy a string from "from" to "to", truncating the string
|
|
* if necessary. "To" is always nul terminated, even if
|
|
* truncation is performed. "Size" is the size of "to".
|
|
*/
|
|
|
|
void
|
|
scopyn(const char *from, char *to, int size)
|
|
{
|
|
|
|
while (--size > 0) {
|
|
if ((*to++ = *from++) == '\0')
|
|
return;
|
|
}
|
|
*to = '\0';
|
|
}
|
|
|
|
|
|
/*
|
|
* prefix -- see if pfx is a prefix of string.
|
|
*/
|
|
|
|
int
|
|
prefix(const char *pfx, const char *string)
|
|
{
|
|
while (*pfx) {
|
|
if (*pfx++ != *string++)
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*
|
|
* Convert a string of digits to an integer, printing an error message on
|
|
* failure.
|
|
*/
|
|
|
|
int
|
|
number(const char *s)
|
|
{
|
|
if (! is_number(s))
|
|
error("Illegal number: %s", (char *)s);
|
|
return atoi(s);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Check for a valid number. This should be elsewhere.
|
|
*/
|
|
|
|
int
|
|
is_number(const char *p)
|
|
{
|
|
do {
|
|
if (! is_digit(*p))
|
|
return 0;
|
|
} while (*++p != '\0');
|
|
return 1;
|
|
}
|