humanize_number.c revision 1.1.2.4
1 1.1.2.4 thorpej /* $NetBSD: humanize_number.c,v 1.1.2.4 2002/12/10 06:25:49 thorpej Exp $ */ 2 1.1.2.2 nathanw 3 1.1.2.2 nathanw /* 4 1.1.2.2 nathanw * Copyright (c) 1997, 1998, 1999, 2002 The NetBSD Foundation, Inc. 5 1.1.2.2 nathanw * All rights reserved. 6 1.1.2.2 nathanw * 7 1.1.2.2 nathanw * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 nathanw * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 1.1.2.2 nathanw * NASA Ames Research Center, by Luke Mewburn and by Tomas Svensson. 10 1.1.2.2 nathanw * 11 1.1.2.2 nathanw * Redistribution and use in source and binary forms, with or without 12 1.1.2.2 nathanw * modification, are permitted provided that the following conditions 13 1.1.2.2 nathanw * are met: 14 1.1.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 15 1.1.2.2 nathanw * notice, this list of conditions and the following disclaimer. 16 1.1.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 17 1.1.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 18 1.1.2.2 nathanw * documentation and/or other materials provided with the distribution. 19 1.1.2.2 nathanw * 3. All advertising materials mentioning features or use of this software 20 1.1.2.2 nathanw * must display the following acknowledgement: 21 1.1.2.2 nathanw * This product includes software developed by the NetBSD 22 1.1.2.2 nathanw * Foundation, Inc. and its contributors. 23 1.1.2.2 nathanw * 4. Neither the name of The NetBSD Foundation nor the names of its 24 1.1.2.2 nathanw * contributors may be used to endorse or promote products derived 25 1.1.2.2 nathanw * from this software without specific prior written permission. 26 1.1.2.2 nathanw * 27 1.1.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 1.1.2.2 nathanw * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 1.1.2.2 nathanw * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 1.1.2.2 nathanw * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 1.1.2.2 nathanw * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 1.1.2.2 nathanw * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 1.1.2.2 nathanw * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 1.1.2.2 nathanw * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 1.1.2.2 nathanw * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 1.1.2.2 nathanw * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 1.1.2.2 nathanw * POSSIBILITY OF SUCH DAMAGE. 38 1.1.2.2 nathanw */ 39 1.1.2.2 nathanw 40 1.1.2.2 nathanw #include <sys/cdefs.h> 41 1.1.2.2 nathanw #ifndef __lint 42 1.1.2.2 nathanw __COPYRIGHT("@(#) Copyright (c) 2002\n\ 43 1.1.2.2 nathanw The NetBSD Foundation, inc. All rights reserved.\n"); 44 1.1.2.4 thorpej __RCSID("$NetBSD: humanize_number.c,v 1.1.2.4 2002/12/10 06:25:49 thorpej Exp $"); 45 1.1.2.2 nathanw #endif /* !__lint */ 46 1.1.2.2 nathanw 47 1.1.2.2 nathanw #include <assert.h> 48 1.1.2.2 nathanw #include <stdio.h> 49 1.1.2.2 nathanw #include <stdlib.h> 50 1.1.2.2 nathanw #include <string.h> 51 1.1.2.2 nathanw #include <locale.h> 52 1.1.2.2 nathanw #include <util.h> 53 1.1.2.2 nathanw 54 1.1.2.2 nathanw int 55 1.1.2.2 nathanw humanize_number(char *buf, size_t len, int64_t bytes, 56 1.1.2.2 nathanw const char *suffix, int scale, int flags) 57 1.1.2.2 nathanw { 58 1.1.2.3 nathanw const char *prefixes; 59 1.1.2.2 nathanw int i, r; 60 1.1.2.2 nathanw int64_t divisor, max, s1, s2, sign; 61 1.1.2.2 nathanw size_t baselen, suffixlen; 62 1.1.2.2 nathanw 63 1.1.2.2 nathanw _DIAGASSERT(buf != NULL); 64 1.1.2.2 nathanw _DIAGASSERT(suffix != NULL); 65 1.1.2.4 thorpej _DIAGASSERT(scale >= 0); 66 1.1.2.2 nathanw 67 1.1.2.3 nathanw if (flags & HN_DIVISOR_1000) { 68 1.1.2.3 nathanw /* SI for decimal multiplies */ 69 1.1.2.3 nathanw divisor = 1000; 70 1.1.2.3 nathanw prefixes = " kMGTPE"; 71 1.1.2.3 nathanw } else { 72 1.1.2.3 nathanw /* 73 1.1.2.3 nathanw * binary multiplies 74 1.1.2.3 nathanw * XXX IEC 60027-2 recommends Ki, Mi, Gi... 75 1.1.2.3 nathanw */ 76 1.1.2.3 nathanw divisor = 1024; 77 1.1.2.3 nathanw prefixes = " KMGTPE"; 78 1.1.2.3 nathanw } 79 1.1.2.3 nathanw 80 1.1.2.4 thorpej if ((size_t) scale >= strlen(prefixes) && scale != HN_AUTOSCALE && 81 1.1.2.2 nathanw scale != HN_GETSCALE) 82 1.1.2.2 nathanw return (-1); 83 1.1.2.2 nathanw 84 1.1.2.2 nathanw if (buf == NULL || suffix == NULL) 85 1.1.2.2 nathanw return (-1); 86 1.1.2.2 nathanw 87 1.1.2.2 nathanw if (len > 0) 88 1.1.2.2 nathanw buf[0] = '\0'; 89 1.1.2.2 nathanw if (bytes < 0) { 90 1.1.2.2 nathanw sign = -1; 91 1.1.2.2 nathanw bytes *= -100; 92 1.1.2.2 nathanw baselen = 4; 93 1.1.2.2 nathanw } else { 94 1.1.2.2 nathanw sign = 1; 95 1.1.2.2 nathanw bytes *= 100; 96 1.1.2.2 nathanw baselen = 3; 97 1.1.2.2 nathanw } 98 1.1.2.2 nathanw 99 1.1.2.2 nathanw suffixlen = strlen(suffix); 100 1.1.2.2 nathanw 101 1.1.2.2 nathanw /* check if enough room for `x y' + suffix + `\0' */ 102 1.1.2.2 nathanw if (len < baselen + suffixlen + 1) 103 1.1.2.2 nathanw return (-1); 104 1.1.2.2 nathanw 105 1.1.2.2 nathanw if (flags & HN_DIVISOR_1000) 106 1.1.2.2 nathanw divisor = 1000; 107 1.1.2.2 nathanw else 108 1.1.2.2 nathanw divisor = 1024; 109 1.1.2.2 nathanw 110 1.1.2.2 nathanw max = 100; 111 1.1.2.4 thorpej for (i = 0; 112 1.1.2.4 thorpej (size_t) i < len - suffixlen - baselen + ((flags & HN_NOSPACE) ? 113 1.1.2.4 thorpej 1 : 0); i++) 114 1.1.2.2 nathanw max *= 10; 115 1.1.2.2 nathanw 116 1.1.2.2 nathanw if ((scale & HN_AUTOSCALE) || (scale & HN_GETSCALE)) { 117 1.1.2.3 nathanw for (i = 0; bytes >= max && prefixes[i + 1]; i++) 118 1.1.2.2 nathanw bytes /= divisor; 119 1.1.2.2 nathanw } else { 120 1.1.2.3 nathanw for (i = 0; i < scale && prefixes[i + 1]; i++) 121 1.1.2.2 nathanw bytes /= divisor; 122 1.1.2.2 nathanw } 123 1.1.2.2 nathanw 124 1.1.2.2 nathanw if (scale & HN_GETSCALE) 125 1.1.2.2 nathanw return (i); 126 1.1.2.2 nathanw 127 1.1.2.2 nathanw if (bytes < 1000 && flags & HN_DECIMAL) { 128 1.1.2.2 nathanw if (len < (baselen + 2 + ((flags & HN_NOSPACE) || (i == 0 && 129 1.1.2.2 nathanw !(flags & HN_B)) ? 0 : 1))) 130 1.1.2.2 nathanw return (-1); 131 1.1.2.2 nathanw s1 = bytes / 100; 132 1.1.2.2 nathanw if ((s2 = (((bytes % 100) + 5) / 10)) == 10) { 133 1.1.2.2 nathanw s1++; 134 1.1.2.2 nathanw s2 = 0; 135 1.1.2.2 nathanw } 136 1.1.2.2 nathanw r = snprintf(buf, len, "%lld%s%lld%s%c%s", 137 1.1.2.2 nathanw /* LONGLONG */ 138 1.1.2.2 nathanw (long long)(sign * s1), 139 1.1.2.2 nathanw localeconv()->decimal_point, 140 1.1.2.2 nathanw /* LONGLONG */ 141 1.1.2.2 nathanw (long long)s2, 142 1.1.2.2 nathanw (i == 0 && !(flags & HN_B)) || flags & HN_NOSPACE ? 143 1.1.2.2 nathanw "" : " ", (i == 0 && (flags & HN_B)) ? 'B' : 144 1.1.2.2 nathanw prefixes[i], suffix); 145 1.1.2.2 nathanw 146 1.1.2.2 nathanw } else 147 1.1.2.2 nathanw r = snprintf(buf, len, "%lld%s%c%s", 148 1.1.2.2 nathanw /* LONGLONG */ 149 1.1.2.2 nathanw (long long)(sign * ((bytes + 50) / 100)), 150 1.1.2.2 nathanw i == 0 || flags & HN_NOSPACE ? "" : " ", (i == 0 && 151 1.1.2.2 nathanw (flags & HN_B)) ? 'B' : prefixes[i], suffix); 152 1.1.2.2 nathanw 153 1.1.2.2 nathanw return (r); 154 1.1.2.2 nathanw } 155
Indexes created Tue Sep 30 17:09:57 GMT 2025