/* $NetBSD: strsuftoull.c,v 1.3 2001/11/30 00:12:04 thorpej Exp $ */ /*- * Copyright (c) 1991, 1993, 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Keith Muller of the University of California, San Diego and Lance * Visser of Convex Computer Corporation. * * 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. */ /*- * Copyright (c) 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Luke Mewburn. * * 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 NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 #ifndef lint __RCSID("$NetBSD: strsuftoull.c,v 1.3 2001/11/30 00:12:04 thorpej Exp $"); #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include "strsuftoull.h" /* * Convert an expression of the following forms to a uint64_t. * 1) A positive decimal number. * 2) A positive decimal number followed by a b (mult by 512). * 3) A positive decimal number followed by a k (mult by 1024). * 4) A positive decimal number followed by a m (mult by 1048576). * 5) A positive decimal number followed by a w (mult by sizeof int) * 6) Two or more positive decimal numbers (with/without k,b or w). * separated by x (also * for backwards compatibility), specifying * the product of the indicated values. * Returns the result upon successful conversion, or exits with an * appropriate error. * */ uint64_t strsuftoull(const char *desc, const char *val, uint64_t min, uint64_t max) { uint64_t result; char errbuf[100]; result = strsuftoullx(desc, val, min, max, errbuf, sizeof(errbuf)); if (*errbuf != '\0') errx(1, "%s", errbuf); return (result); } /* * As strsuftoull(), but returns the error message into the provided buffer * rather than exiting with it. */ uint64_t strsuftoullx(const char *desc, const char *val, uint64_t min, uint64_t max, char *ebuf, size_t ebuflen) { uint64_t num, t; char *expr; assert(desc != NULL); assert(val != NULL); assert(ebuf != NULL); errno = 0; if (*val == '-') /* Prevent negative numbers */ goto badnum; num = strtoull(val, &expr, 0); if (num == LLONG_MAX && errno == ERANGE) goto erange; /* Overflow */ if (expr == val) /* No digits */ goto badnum; switch (*expr) { case 'b': t = num; num *= 512; /* 1 block */ if (t > num) goto erange; ++expr; break; case 'k': t = num; num *= 1024; /* 1 kilobyte */ if (t > num) goto erange; ++expr; break; case 'm': t = num; num *= 1048576; /* 1 megabyte */ if (t > num) goto erange; ++expr; break; case 'g': t = num; num *= 1073741824; /* 1 gigabyte */ if (t > num) goto erange; ++expr; break; case 't': t = num; num *= 1099511627776; /* 1 terabyte */ if (t > num) goto erange; ++expr; break; case 'w': t = num; num *= sizeof(int); /* 1 word */ if (t > num) goto erange; ++expr; break; } switch (*expr) { case '\0': break; case '*': /* Backward compatible */ case 'x': t = num; num *= strsuftoullx(desc, expr + 1, min, max, ebuf, ebuflen); if (*ebuf != '\0') return (0); if (t > num) { erange: snprintf(ebuf, ebuflen, "%s: %s", desc, strerror(ERANGE)); return (0); } break; default: badnum: snprintf(ebuf, ebuflen, "%s `%s': illegal positive number", desc, val); return (0); } if (num < min) { snprintf(ebuf, ebuflen, "%s %lld is less than %lld.", desc, (long long)num, (long long)min); return (0); } if (num > max) { snprintf(ebuf, ebuflen, "%s %lld is greater than %lld.", desc, (long long)num, (long long)max); return (0); } *ebuf = '\0'; return (num); }