1dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* $NetBSD: mystring.c,v 1.16 2003/08/07 09:05:35 agc Exp $ */ 2dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 3dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/*- 4dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Copyright (c) 1991, 1993 5dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * The Regents of the University of California. All rights reserved. 6dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 7dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * This code is derived from software contributed to Berkeley by 8dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Kenneth Almquist. 9dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 10dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Redistribution and use in source and binary forms, with or without 11dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * modification, are permitted provided that the following conditions 12dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * are met: 13dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 14dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * notice, this list of conditions and the following disclaimer. 15dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 16dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 17dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * documentation and/or other materials provided with the distribution. 18dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 3. Neither the name of the University nor the names of its contributors 19dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * may be used to endorse or promote products derived from this software 20dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * without specific prior written permission. 21dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 22dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * SUCH DAMAGE. 33dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 34dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 35dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/cdefs.h> 36dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#ifndef lint 37dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#if 0 38dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic char sccsid[] = "@(#)mystring.c 8.2 (Berkeley) 5/4/95"; 39dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#else 40dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project__RCSID("$NetBSD: mystring.c,v 1.16 2003/08/07 09:05:35 agc Exp $"); 41dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#endif 42dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#endif /* not lint */ 43dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 44dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 45dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * String functions. 46dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 47dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * equal(s1, s2) Return true if strings are equal. 48dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * scopy(from, to) Copy a string. 49dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * scopyn(from, to, n) Like scopy, but checks for overflow. 50dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * number(s) Convert a string of digits to an integer. 51dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * is_number(s) Return true if s is a string of digits. 52dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 53dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 54dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <stdlib.h> 55dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include "shell.h" 56dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include "syntax.h" 57dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include "error.h" 58dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include "mystring.h" 59dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 60dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 61dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectchar nullstr[1]; /* zero length string */ 62dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 63dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 64dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * equal - #defined in mystring.h 65dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 66dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 67dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 68dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * scopy - #defined in mystring.h 69dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 70dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 71dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 72dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 73dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * scopyn - copy a string from "from" to "to", truncating the string 74dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * if necessary. "To" is always nul terminated, even if 75dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * truncation is performed. "Size" is the size of "to". 76dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 77dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 78dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid 79dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectscopyn(const char *from, char *to, int size) 80dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 81dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 82dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while (--size > 0) { 83dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if ((*to++ = *from++) == '\0') 84dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return; 85dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 86dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *to = '\0'; 87dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 88dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 89dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 90dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 91dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * prefix -- see if pfx is a prefix of string. 92dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 93dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 94dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectint 95dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectprefix(const char *pfx, const char *string) 96dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 97dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while (*pfx) { 98dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (*pfx++ != *string++) 99dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 100dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 101dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 102dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 103dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 104dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 105dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 106dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Convert a string of digits to an integer, printing an error message on 107dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * failure. 108dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 109dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 110dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectint 111dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectnumber(const char *s) 112dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 113dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 114dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (! is_number(s)) 115dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project error("Illegal number: %s", s); 116dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return atoi(s); 117dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 118dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 119dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 120dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 121dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 122dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Check for a valid number. This should be elsewhere. 123dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 124dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 125dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectint 126dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectis_number(const char *p) 127dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 128dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project do { 129dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (! is_digit(*p)) 130dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 131dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } while (*++p != '\0'); 132dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 133dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 134