humanize_number.c revision 1.1
1 1.1 abs /* $NetBSD: humanize_number.c,v 1.1 2002/08/22 17:24:10 abs Exp $ */ 2 1.1 abs 3 1.1 abs /* 4 1.1 abs * Copyright (c) 1997, 1998, 1999, 2002 The NetBSD Foundation, Inc. 5 1.1 abs * All rights reserved. 6 1.1 abs * 7 1.1 abs * This code is derived from software contributed to The NetBSD Foundation 8 1.1 abs * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 1.1 abs * NASA Ames Research Center, by Luke Mewburn and by Tomas Svensson. 10 1.1 abs * 11 1.1 abs * Redistribution and use in source and binary forms, with or without 12 1.1 abs * modification, are permitted provided that the following conditions 13 1.1 abs * are met: 14 1.1 abs * 1. Redistributions of source code must retain the above copyright 15 1.1 abs * notice, this list of conditions and the following disclaimer. 16 1.1 abs * 2. Redistributions in binary form must reproduce the above copyright 17 1.1 abs * notice, this list of conditions and the following disclaimer in the 18 1.1 abs * documentation and/or other materials provided with the distribution. 19 1.1 abs * 3. All advertising materials mentioning features or use of this software 20 1.1 abs * must display the following acknowledgement: 21 1.1 abs * This product includes software developed by the NetBSD 22 1.1 abs * Foundation, Inc. and its contributors. 23 1.1 abs * 4. Neither the name of The NetBSD Foundation nor the names of its 24 1.1 abs * contributors may be used to endorse or promote products derived 25 1.1 abs * from this software without specific prior written permission. 26 1.1 abs * 27 1.1 abs * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 1.1 abs * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 1.1 abs * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 1.1 abs * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 1.1 abs * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 1.1 abs * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 1.1 abs * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 1.1 abs * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 1.1 abs * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 1.1 abs * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 1.1 abs * POSSIBILITY OF SUCH DAMAGE. 38 1.1 abs */ 39 1.1 abs 40 1.1 abs #include <sys/cdefs.h> 41 1.1 abs #ifndef __lint 42 1.1 abs __COPYRIGHT("@(#) Copyright (c) 2002\n\ 43 1.1 abs The NetBSD Foundation, inc. All rights reserved.\n"); 44 1.1 abs __RCSID("$NetBSD: humanize_number.c,v 1.1 2002/08/22 17:24:10 abs Exp $"); 45 1.1 abs #endif /* !__lint */ 46 1.1 abs 47 1.1 abs #include <assert.h> 48 1.1 abs #include <stdio.h> 49 1.1 abs #include <stdlib.h> 50 1.1 abs #include <string.h> 51 1.1 abs #include <locale.h> 52 1.1 abs #include <util.h> 53 1.1 abs 54 1.1 abs int 55 1.1 abs humanize_number(char *buf, size_t len, int64_t bytes, 56 1.1 abs const char *suffix, int scale, int flags) 57 1.1 abs { 58 1.1 abs static const char prefixes[] = " KMGTPE"; 59 1.1 abs 60 1.1 abs int i, r; 61 1.1 abs int64_t divisor, max, s1, s2, sign; 62 1.1 abs size_t baselen, suffixlen; 63 1.1 abs 64 1.1 abs _DIAGASSERT(buf != NULL); 65 1.1 abs _DIAGASSERT(suffix != NULL); 66 1.1 abs 67 1.1 abs if (scale >= sizeof(prefixes) && scale != HN_AUTOSCALE && 68 1.1 abs scale != HN_GETSCALE) 69 1.1 abs return (-1); 70 1.1 abs 71 1.1 abs if (buf == NULL || suffix == NULL) 72 1.1 abs return (-1); 73 1.1 abs 74 1.1 abs if (len > 0) 75 1.1 abs buf[0] = '\0'; 76 1.1 abs if (bytes < 0) { 77 1.1 abs sign = -1; 78 1.1 abs bytes *= -100; 79 1.1 abs baselen = 4; 80 1.1 abs } else { 81 1.1 abs sign = 1; 82 1.1 abs bytes *= 100; 83 1.1 abs baselen = 3; 84 1.1 abs } 85 1.1 abs 86 1.1 abs suffixlen = strlen(suffix); 87 1.1 abs 88 1.1 abs /* check if enough room for `x y' + suffix + `\0' */ 89 1.1 abs if (len < baselen + suffixlen + 1) 90 1.1 abs return (-1); 91 1.1 abs 92 1.1 abs if (flags & HN_DIVISOR_1000) 93 1.1 abs divisor = 1000; 94 1.1 abs else 95 1.1 abs divisor = 1024; 96 1.1 abs 97 1.1 abs max = 100; 98 1.1 abs for (i = 0; i < len - suffixlen - baselen + ((flags & HN_NOSPACE) ? 99 1.1 abs 1 : 0); i++) 100 1.1 abs max *= 10; 101 1.1 abs 102 1.1 abs if ((scale & HN_AUTOSCALE) || (scale & HN_GETSCALE)) { 103 1.1 abs for (i = 0; bytes >= max && i < sizeof(prefixes); i++) 104 1.1 abs bytes /= divisor; 105 1.1 abs } else { 106 1.1 abs for (i = 0; i < scale && i < sizeof(prefixes); i++) 107 1.1 abs bytes /= divisor; 108 1.1 abs } 109 1.1 abs 110 1.1 abs if (scale & HN_GETSCALE) 111 1.1 abs return (i); 112 1.1 abs 113 1.1 abs if (bytes < 1000 && flags & HN_DECIMAL) { 114 1.1 abs if (len < (baselen + 2 + ((flags & HN_NOSPACE) || (i == 0 && 115 1.1 abs !(flags & HN_B)) ? 0 : 1))) 116 1.1 abs return (-1); 117 1.1 abs s1 = bytes / 100; 118 1.1 abs if ((s2 = (((bytes % 100) + 5) / 10)) == 10) { 119 1.1 abs s1++; 120 1.1 abs s2 = 0; 121 1.1 abs } 122 1.1 abs r = snprintf(buf, len, "%lld%s%lld%s%c%s", 123 1.1 abs /* LONGLONG */ 124 1.1 abs (long long)(sign * s1), 125 1.1 abs localeconv()->decimal_point, 126 1.1 abs /* LONGLONG */ 127 1.1 abs (long long)s2, 128 1.1 abs (i == 0 && !(flags & HN_B)) || flags & HN_NOSPACE ? 129 1.1 abs "" : " ", (i == 0 && (flags & HN_B)) ? 'B' : 130 1.1 abs prefixes[i], suffix); 131 1.1 abs 132 1.1 abs } else 133 1.1 abs r = snprintf(buf, len, "%lld%s%c%s", 134 1.1 abs /* LONGLONG */ 135 1.1 abs (long long)(sign * ((bytes + 50) / 100)), 136 1.1 abs i == 0 || flags & HN_NOSPACE ? "" : " ", (i == 0 && 137 1.1 abs (flags & HN_B)) ? 'B' : prefixes[i], suffix); 138 1.1 abs 139 1.1 abs return (r); 140 1.1 abs } 141
Indexes created Tue Sep 23 07:09:52 GMT 2025