diff options
Diffstat (limited to 'usr.sbin/makefs/cd9660/cd9660_conversion.c')
| -rw-r--r-- | usr.sbin/makefs/cd9660/cd9660_conversion.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/usr.sbin/makefs/cd9660/cd9660_conversion.c b/usr.sbin/makefs/cd9660/cd9660_conversion.c new file mode 100644 index 000000000000..4ccc87e22661 --- /dev/null +++ b/usr.sbin/makefs/cd9660/cd9660_conversion.c @@ -0,0 +1,200 @@ +/* $NetBSD: cd9660_conversion.c,v 1.4 2007/03/14 14:11:17 christos Exp $ */ + +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan + * Perez-Rathke and Ram Vedam. All rights reserved. + * + * This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys, + * Alan Perez-Rathke and Ram Vedam. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN + * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``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 DANIEL WATT, WALTER DEIGNAN, RYAN + * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM 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 "cd9660.h" + +#include <sys/cdefs.h> +static char cd9660_compute_gm_offset(time_t); + +#if 0 +static inline int +cd9660_pad_even(length) +int length; +{ + return length + (length & 0x01); +} +#endif + +/* +* These can probably be implemented using a macro +*/ + +/* Little endian */ +void +cd9660_721(uint16_t w, unsigned char *twochar) +{ +#if BYTE_ORDER == BIG_ENDIAN + w = bswap16(w); +#endif + memcpy(twochar,&w,2); +} + +void +cd9660_731(uint32_t w, unsigned char *fourchar) +{ +#if BYTE_ORDER == BIG_ENDIAN + w = bswap32(w); +#endif + memcpy(fourchar,&w,4); +} + +/* Big endian */ +void +cd9660_722(uint16_t w, unsigned char *twochar) +{ +#if BYTE_ORDER == LITTLE_ENDIAN + w = bswap16(w); +#endif + memcpy(twochar,&w,2); +} + +void +cd9660_732(uint32_t w, unsigned char *fourchar) +{ +#if BYTE_ORDER == LITTLE_ENDIAN + w = bswap32(w); +#endif + memcpy(fourchar,&w,4); +} + +/** +* Convert a dword into a double endian string of eight characters +* @param int The double word to convert +* @param char* The string to write the both endian double word to - It is assumed this is allocated and at least +* eight characters long +*/ +void +cd9660_bothendian_dword(uint32_t dw, unsigned char *eightchar) +{ + uint32_t le, be; +#if BYTE_ORDER == LITTLE_ENDIAN + le = dw; + be = bswap32(dw); +#endif +#if BYTE_ORDER == BIG_ENDIAN + be = dw; + le = bswap32(dw); +#endif + memcpy(eightchar, &le, 4); + memcpy((eightchar+4), &be, 4); +} + +/** +* Convert a word into a double endian string of four characters +* @param int The word to convert +* @param char* The string to write the both endian word to - It is assumed this is allocated and at least +* four characters long +*/ +void +cd9660_bothendian_word(uint16_t dw, unsigned char *fourchar) +{ + uint16_t le, be; +#if BYTE_ORDER == LITTLE_ENDIAN + le = dw; + be = bswap16(dw); +#endif +#if BYTE_ORDER == BIG_ENDIAN + be = dw; + le = bswap16(dw); +#endif + memcpy(fourchar, &le, 2); + memcpy((fourchar+2), &be, 2); +} + +void +cd9660_pad_string_spaces(char *str, int len) +{ + int i; + + for (i = 0; i < len; i ++) { + if (str[i] == '\0') + str[i] = 0x20; + } +} + +static char +cd9660_compute_gm_offset(time_t tim) +{ + struct tm t, gm; + + (void)localtime_r(&tim, &t); + (void)gmtime_r(&tim, &gm); + gm.tm_year -= t.tm_year; + gm.tm_yday -= t.tm_yday; + gm.tm_hour -= t.tm_hour; + gm.tm_min -= t.tm_min; + if (gm.tm_year < 0) + gm.tm_yday = -1; + else if (gm.tm_year > 0) + gm.tm_yday = 1; + + return (char)(-(gm.tm_min + 60* (24 * gm.tm_yday + gm.tm_hour)) / 15); +} + +/* Long dates: 17 characters */ +void +cd9660_time_8426(unsigned char *buf, time_t tim) +{ + struct tm t; + char temp[18]; + + (void)localtime_r(&tim, &t); + (void)snprintf(temp, sizeof(temp), "%04i%02i%02i%02i%02i%02i%02i", + 1900+(int)t.tm_year, + (int)t.tm_mon+1, + (int)t.tm_mday, + (int)t.tm_hour, + (int)t.tm_min, + (int)t.tm_sec, + 0); + (void)memcpy(buf, temp, 16); + buf[16] = cd9660_compute_gm_offset(tim); +} + +/* Short dates: 7 characters */ +void +cd9660_time_915(unsigned char *buf, time_t tim) +{ + struct tm t; + + (void)localtime_r(&tim, &t); + buf[0] = t.tm_year; + buf[1] = t.tm_mon+1; + buf[2] = t.tm_mday; + buf[3] = t.tm_hour; + buf[4] = t.tm_min; + buf[5] = t.tm_sec; + buf[6] = cd9660_compute_gm_offset(tim); +} |