1 /* $NetBSD: strsuftoll.c,v 1.9 2011/10/22 22:08:47 christos Exp $ */ 2 /*- 3 * Copyright (c) 2001-2002,2004 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Luke Mewburn. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 /*- 31 * Copyright (c) 1991, 1993, 1994 32 * The Regents of the University of California. All rights reserved. 33 * 34 * This code is derived from software contributed to Berkeley by 35 * Keith Muller of the University of California, San Diego and Lance 36 * Visser of Convex Computer Corporation. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 */ 62 63 #if HAVE_NBTOOL_CONFIG_H 64 #include "nbtool_config.h" 65 #endif 66 67 #include <sys/cdefs.h> 68 69 #if defined(LIBC_SCCS) && !defined(lint) 70 __RCSID("$NetBSD: strsuftoll.c,v 1.9 2011/10/22 22:08:47 christos Exp $"); 71 #endif /* LIBC_SCCS and not lint */ 72 73 #ifdef _LIBC 74 #include "namespace.h" 75 #endif 76 77 #if !HAVE_STRSUFTOLL 78 79 #include <sys/types.h> 80 #include <sys/time.h> 81 82 #include <assert.h> 83 #include <ctype.h> 84 #include <err.h> 85 #include <errno.h> 86 #include <limits.h> 87 #include <stdio.h> 88 #include <stdlib.h> 89 #include <string.h> 90 91 #ifdef _LIBC 92 # ifdef __weak_alias 93 __weak_alias(strsuftoll, _strsuftoll) 94 __weak_alias(strsuftollx, _strsuftollx) 95 # endif 96 #endif /* LIBC */ 97 98 /* 99 * Convert an expression of the following forms to a (u)int64_t. 100 * 1) A positive decimal number. 101 * 2) A positive decimal number followed by a b (mult by 512). 102 * 3) A positive decimal number followed by a k (mult by 1024). 103 * 4) A positive decimal number followed by a m (mult by 1048576). 104 * 5) A positive decimal number followed by a g (mult by 1073741824). 105 * 6) A positive decimal number followed by a t (mult by 1099511627776). 106 * 7) A positive decimal number followed by a w (mult by sizeof int) 107 * 8) Two or more positive decimal numbers (with/without k,b or w). 108 * separated by x (also * for backwards compatibility), specifying 109 * the product of the indicated values. 110 * Returns the result upon successful conversion, or exits with an 111 * appropriate error. 112 * 113 */ 114 /* LONGLONG */ 115 long long 116 strsuftoll(const char *desc, const char *val, 117 long long min, long long max) 118 { 119 long long result; 120 char errbuf[100]; 121 122 result = strsuftollx(desc, val, min, max, errbuf, sizeof(errbuf)); 123 if (*errbuf != '\0') 124 errx(EXIT_FAILURE, "%s", errbuf); 125 return result; 126 } 127 128 /* 129 * As strsuftoll(), but returns the error message into the provided buffer 130 * rather than exiting with it. 131 */ 132 /* LONGLONG */ 133 static long long 134 __strsuftollx(const char *desc, const char *val, 135 long long min, long long max, char *ebuf, size_t ebuflen, size_t depth) 136 { 137 long long num, t; 138 char *expr; 139 140 _DIAGASSERT(desc != NULL); 141 _DIAGASSERT(val != NULL); 142 _DIAGASSERT(ebuf != NULL); 143 144 if (depth > 16) { 145 snprintf(ebuf, ebuflen, "%s: Recursion limit exceeded", desc); 146 return 0; 147 } 148 149 while (isspace((unsigned char)*val)) /* Skip leading space */ 150 val++; 151 152 errno = 0; 153 num = strtoll(val, &expr, 10); 154 if (errno == ERANGE) 155 goto erange; /* Overflow */ 156 157 if (expr == val) /* No digits */ 158 goto badnum; 159 160 switch (*expr) { 161 case 'b': 162 t = num; 163 num *= 512; /* 1 block */ 164 if (t > num) 165 goto erange; 166 ++expr; 167 break; 168 case 'k': 169 t = num; 170 num *= 1024; /* 1 kibibyte */ 171 if (t > num) 172 goto erange; 173 ++expr; 174 break; 175 case 'm': 176 t = num; 177 num *= 1048576; /* 1 mebibyte */ 178 if (t > num) 179 goto erange; 180 ++expr; 181 break; 182 case 'g': 183 t = num; 184 num *= 1073741824; /* 1 gibibyte */ 185 if (t > num) 186 goto erange; 187 ++expr; 188 break; 189 case 't': 190 t = num; 191 num *= 1099511627776LL; /* 1 tebibyte */ 192 if (t > num) 193 goto erange; 194 ++expr; 195 break; 196 case 'w': 197 t = num; 198 num *= sizeof(int); /* 1 word */ 199 if (t > num) 200 goto erange; 201 ++expr; 202 break; 203 } 204 205 switch (*expr) { 206 case '\0': 207 break; 208 case '*': /* Backward compatible */ 209 case 'x': 210 t = num; 211 num *= __strsuftollx(desc, expr + 1, min, max, ebuf, ebuflen, 212 depth + 1); 213 if (*ebuf != '\0') 214 return 0; 215 if (t > num) { 216 erange: 217 errno = ERANGE; 218 snprintf(ebuf, ebuflen, "%s: %s", desc, strerror(errno)); 219 return 0; 220 } 221 break; 222 default: 223 badnum: 224 snprintf(ebuf, ebuflen, "%s `%s': illegal number", desc, val); 225 return 0; 226 } 227 if (num < min) { 228 /* LONGLONG */ 229 snprintf(ebuf, ebuflen, "%s %lld is less than %lld.", 230 desc, (long long)num, (long long)min); 231 return 0; 232 } 233 if (num > max) { 234 /* LONGLONG */ 235 snprintf(ebuf, ebuflen, "%s %lld is greater than %lld.", 236 desc, (long long)num, (long long)max); 237 return 0; 238 } 239 *ebuf = '\0'; 240 return num; 241 } 242 243 long long 244 strsuftollx(const char *desc, const char *val, 245 long long min, long long max, char *ebuf, size_t ebuflen) 246 { 247 return __strsuftollx(desc, val, min, max, ebuf, ebuflen, 0); 248 } 249 #endif /* !HAVE_STRSUFTOLL */ 250
