7551d83c35
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
203 lines
4.8 KiB
C
203 lines
4.8 KiB
C
/* $NetBSD: cd9660_conversion.c,v 1.4 2007/03/14 14:11:17 christos Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-NetBSD
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*
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* Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan
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* Perez-Rathke and Ram Vedam. All rights reserved.
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*
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* This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys,
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* Alan Perez-Rathke and Ram Vedam.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN
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* GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL DANIEL WATT, WALTER DEIGNAN, RYAN
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* GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE,DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*/
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#include "cd9660.h"
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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static char cd9660_compute_gm_offset(time_t);
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#if 0
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static inline int
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cd9660_pad_even(length)
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int length;
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{
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return length + (length & 0x01);
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}
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#endif
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/*
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* These can probably be implemented using a macro
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*/
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/* Little endian */
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void
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cd9660_721(uint16_t w, unsigned char *twochar)
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{
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#if BYTE_ORDER == BIG_ENDIAN
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w = bswap16(w);
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#endif
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memcpy(twochar,&w,2);
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}
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void
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cd9660_731(uint32_t w, unsigned char *fourchar)
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{
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#if BYTE_ORDER == BIG_ENDIAN
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w = bswap32(w);
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#endif
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memcpy(fourchar,&w,4);
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}
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/* Big endian */
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void
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cd9660_722(uint16_t w, unsigned char *twochar)
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{
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#if BYTE_ORDER == LITTLE_ENDIAN
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w = bswap16(w);
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#endif
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memcpy(twochar,&w,2);
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}
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void
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cd9660_732(uint32_t w, unsigned char *fourchar)
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{
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#if BYTE_ORDER == LITTLE_ENDIAN
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w = bswap32(w);
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#endif
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memcpy(fourchar,&w,4);
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}
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/**
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* Convert a dword into a double endian string of eight characters
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* @param int The double word to convert
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* @param char* The string to write the both endian double word to - It is assumed this is allocated and at least
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* eight characters long
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*/
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void
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cd9660_bothendian_dword(uint32_t dw, unsigned char *eightchar)
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{
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uint32_t le, be;
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#if BYTE_ORDER == LITTLE_ENDIAN
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le = dw;
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be = bswap32(dw);
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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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be = dw;
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le = bswap32(dw);
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#endif
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memcpy(eightchar, &le, 4);
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memcpy((eightchar+4), &be, 4);
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}
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/**
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* Convert a word into a double endian string of four characters
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* @param int The word to convert
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* @param char* The string to write the both endian word to - It is assumed this is allocated and at least
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* four characters long
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*/
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void
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cd9660_bothendian_word(uint16_t dw, unsigned char *fourchar)
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{
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uint16_t le, be;
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#if BYTE_ORDER == LITTLE_ENDIAN
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le = dw;
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be = bswap16(dw);
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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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be = dw;
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le = bswap16(dw);
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#endif
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memcpy(fourchar, &le, 2);
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memcpy((fourchar+2), &be, 2);
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}
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void
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cd9660_pad_string_spaces(char *str, int len)
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{
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int i;
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for (i = 0; i < len; i ++) {
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if (str[i] == '\0')
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str[i] = 0x20;
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}
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}
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static char
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cd9660_compute_gm_offset(time_t tim)
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{
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struct tm t, gm;
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(void)localtime_r(&tim, &t);
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(void)gmtime_r(&tim, &gm);
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gm.tm_year -= t.tm_year;
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gm.tm_yday -= t.tm_yday;
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gm.tm_hour -= t.tm_hour;
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gm.tm_min -= t.tm_min;
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if (gm.tm_year < 0)
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gm.tm_yday = -1;
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else if (gm.tm_year > 0)
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gm.tm_yday = 1;
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return (char)(-(gm.tm_min + 60* (24 * gm.tm_yday + gm.tm_hour)) / 15);
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}
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/* Long dates: 17 characters */
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void
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cd9660_time_8426(unsigned char *buf, time_t tim)
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{
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struct tm t;
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char temp[18];
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(void)localtime_r(&tim, &t);
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(void)snprintf(temp, sizeof(temp), "%04i%02i%02i%02i%02i%02i%02i",
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1900+(int)t.tm_year,
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(int)t.tm_mon+1,
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(int)t.tm_mday,
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(int)t.tm_hour,
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(int)t.tm_min,
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(int)t.tm_sec,
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0);
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(void)memcpy(buf, temp, 16);
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buf[16] = cd9660_compute_gm_offset(tim);
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}
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/* Short dates: 7 characters */
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void
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cd9660_time_915(unsigned char *buf, time_t tim)
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{
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struct tm t;
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(void)localtime_r(&tim, &t);
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buf[0] = t.tm_year;
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buf[1] = t.tm_mon+1;
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buf[2] = t.tm_mday;
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buf[3] = t.tm_hour;
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buf[4] = t.tm_min;
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buf[5] = t.tm_sec;
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buf[6] = cd9660_compute_gm_offset(tim);
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}
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