cd9660_conversion.c revision 224762
1193326Sed/* $NetBSD: cd9660_conversion.c,v 1.4 2007/03/14 14:11:17 christos Exp $ */ 2193326Sed 3193326Sed/* 4193326Sed * Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan 5193326Sed * Perez-Rathke and Ram Vedam. All rights reserved. 6193326Sed * 7193326Sed * This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys, 8193326Sed * Alan Perez-Rathke and Ram Vedam. 9193326Sed * 10193326Sed * Redistribution and use in source and binary forms, with or 11193326Sed * without modification, are permitted provided that the following 12193326Sed * conditions are met: 13193326Sed * 1. Redistributions of source code must retain the above copyright 14252723Sdim * notice, this list of conditions and the following disclaimer. 15193326Sed * 2. Redistributions in binary form must reproduce the above 16226890Sdim * copyright notice, this list of conditions and the following 17193326Sed * disclaimer in the documentation and/or other materials provided 18263509Sdim * with the distribution. 19235633Sdim * 20200583Srdivacky * THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN 21198092Srdivacky * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``AS IS'' AND ANY EXPRESS OR 22218893Sdim * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23193326Sed * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 24193326Sed * DISCLAIMED. IN NO EVENT SHALL DANIEL WATT, WALTER DEIGNAN, RYAN 25193326Sed * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM BE LIABLE FOR ANY DIRECT, INDIRECT, 26193326Sed * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27193326Sed * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 28263509Sdim * USE,DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 29263509Sdim * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30263509Sdim * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31263509Sdim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 32263509Sdim * OF SUCH DAMAGE. 33263509Sdim */ 34263509Sdim#include "cd9660.h" 35263509Sdim 36263509Sdim#include <sys/cdefs.h> 37263509Sdim__FBSDID("$FreeBSD: head/usr.sbin/makefs/cd9660/cd9660_conversion.c 224762 2011-08-10 19:12:21Z marius $"); 38193326Sed 39193326Sedstatic char cd9660_compute_gm_offset(time_t); 40263509Sdim 41193326Sed#if 0 42226890Sdimstatic inline int 43193326Sedcd9660_pad_even(length) 44193326Sedint length; 45193326Sed{ 46263509Sdim return length + (length & 0x01); 47193326Sed} 48193326Sed#endif 49193326Sed 50193326Sed/* 51193326Sed* These can probably be implemented using a macro 52263509Sdim*/ 53193326Sed 54226890Sdim/* Little endian */ 55193326Sedvoid 56263509Sdimcd9660_721(uint16_t w, unsigned char *twochar) 57263509Sdim{ 58263509Sdim#if BYTE_ORDER == BIG_ENDIAN 59263509Sdim w = bswap16(w); 60263509Sdim#endif 61263509Sdim memcpy(twochar,&w,2); 62263509Sdim} 63193326Sed 64193326Sedvoid 65193326Sedcd9660_731(uint32_t w, unsigned char *fourchar) 66199482Srdivacky{ 67193326Sed#if BYTE_ORDER == BIG_ENDIAN 68193326Sed w = bswap32(w); 69193326Sed#endif 70193326Sed memcpy(fourchar,&w,4); 71193326Sed} 72193326Sed 73198092Srdivacky/* Big endian */ 74193326Sedvoid 75193326Sedcd9660_722(uint16_t w, unsigned char *twochar) 76193326Sed{ 77198092Srdivacky#if BYTE_ORDER == LITTLE_ENDIAN 78210299Sed w = bswap16(w); 79210299Sed#endif 80210299Sed memcpy(twochar,&w,2); 81212904Sdim} 82212904Sdim 83212904Sdimvoid 84202879Srdivackycd9660_732(uint32_t w, unsigned char *fourchar) 85202879Srdivacky{ 86202879Srdivacky#if BYTE_ORDER == LITTLE_ENDIAN 87206084Srdivacky w = bswap32(w); 88206084Srdivacky#endif 89206084Srdivacky memcpy(fourchar,&w,4); 90206084Srdivacky} 91226890Sdim 92218893Sdim/** 93206084Srdivacky* Convert a dword into a double endian string of eight characters 94221345Sdim* @param int The double word to convert 95221345Sdim* @param char* The string to write the both endian double word to - It is assumed this is allocated and at least 96221345Sdim* eight characters long 97263509Sdim*/ 98263509Sdimvoid 99263509Sdimcd9660_bothendian_dword(uint32_t dw, unsigned char *eightchar) 100221345Sdim{ 101221345Sdim uint32_t le, be; 102221345Sdim#if BYTE_ORDER == LITTLE_ENDIAN 103235633Sdim le = dw; 104235633Sdim be = bswap32(dw); 105193326Sed#endif 106193326Sed#if BYTE_ORDER == BIG_ENDIAN 107193326Sed be = dw; 108193326Sed le = bswap32(dw); 109204643Srdivacky#endif 110204643Srdivacky memcpy(eightchar, &le, 4); 111204643Srdivacky memcpy((eightchar+4), &be, 4); 112221345Sdim} 113193326Sed 114193326Sed/** 115205408Srdivacky* Convert a word into a double endian string of four characters 116205408Srdivacky* @param int The word to convert 117205408Srdivacky* @param char* The string to write the both endian word to - It is assumed this is allocated and at least 118218893Sdim* four characters long 119218893Sdim*/ 120218893Sdimvoid 121221345Sdimcd9660_bothendian_word(uint16_t dw, unsigned char *fourchar) 122221345Sdim{ 123221345Sdim uint16_t le, be; 124226890Sdim#if BYTE_ORDER == LITTLE_ENDIAN 125263509Sdim le = dw; 126263509Sdim be = bswap16(dw); 127226890Sdim#endif 128193326Sed#if BYTE_ORDER == BIG_ENDIAN 129263509Sdim be = dw; 130198092Srdivacky le = bswap16(dw); 131235633Sdim#endif 132263509Sdim memcpy(fourchar, &le, 2); 133221345Sdim memcpy((fourchar+2), &be, 2); 134263509Sdim} 135263509Sdim 136193326Sedvoid 137193326Sedcd9660_pad_string_spaces(char *str, int len) 138203955Srdivacky{ 139193326Sed int i; 140205408Srdivacky 141205408Srdivacky for (i = 0; i < len; i ++) { 142205408Srdivacky if (str[i] == '\0') 143205408Srdivacky str[i] = 0x20; 144218893Sdim } 145218893Sdim} 146218893Sdim 147218893Sdimstatic char 148221345Sdimcd9660_compute_gm_offset(time_t tim) 149221345Sdim{ 150221345Sdim struct tm t, gm; 151221345Sdim 152221345Sdim (void)localtime_r(&tim, &t); 153226890Sdim (void)gmtime_r(&tim, &gm); 154226890Sdim gm.tm_year -= t.tm_year; 155226890Sdim gm.tm_yday -= t.tm_yday; 156203955Srdivacky gm.tm_hour -= t.tm_hour; 157221345Sdim gm.tm_min -= t.tm_min; 158218893Sdim if (gm.tm_year < 0) 159218893Sdim gm.tm_yday = -1; 160203955Srdivacky else if (gm.tm_year > 0) 161203955Srdivacky gm.tm_yday = 1; 162203955Srdivacky 163193326Sed return (char)(-(gm.tm_min + 60* (24 * gm.tm_yday + gm.tm_hour)) / 15); 164193326Sed} 165193326Sed 166203955Srdivacky/* Long dates: 17 characters */ 167193326Sedvoid 168193326Sedcd9660_time_8426(unsigned char *buf, time_t tim) 169193326Sed{ 170193326Sed struct tm t; 171198092Srdivacky char temp[18]; 172193326Sed 173193326Sed (void)localtime_r(&tim, &t); 174193326Sed (void)snprintf(temp, sizeof(temp), "%04i%02i%02i%02i%02i%02i%02i", 175235633Sdim 1900+(int)t.tm_year, 176235633Sdim (int)t.tm_mon+1, 177235633Sdim (int)t.tm_mday, 178245431Sdim (int)t.tm_hour, 179235633Sdim (int)t.tm_min, 180235633Sdim (int)t.tm_sec, 181235633Sdim 0); 182210299Sed (void)memcpy(buf, temp, 16); 183210299Sed buf[16] = cd9660_compute_gm_offset(tim); 184210299Sed} 185263509Sdim 186263509Sdim/* Short dates: 7 characters */ 187210299Sedvoid 188226890Sdimcd9660_time_915(unsigned char *buf, time_t tim) 189226890Sdim{ 190263509Sdim struct tm t; 191263509Sdim 192226890Sdim (void)localtime_r(&tim, &t); 193193326Sed buf[0] = t.tm_year; 194226890Sdim buf[1] = t.tm_mon+1; 195235633Sdim buf[2] = t.tm_mday; 196226890Sdim buf[3] = t.tm_hour; 197226890Sdim buf[4] = t.tm_min; 198193326Sed buf[5] = t.tm_sec; 199193326Sed buf[6] = cd9660_compute_gm_offset(tim); 200193326Sed} 201193326Sed