mirror of https://github.com/pbatard/rufus.git
231 lines
7.0 KiB
C
231 lines
7.0 KiB
C
/*
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Copyright (C) 2000, 2004 Herbert Valerio Riedel <hvr@gnu.org>
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Copyright (C) 2005, 2008, 2012, 2015 Rocky Bernstein <rocky@gnu.org>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file bytesex.h
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* \brief Generic Byte-swapping routines.
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*
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* Note: this header will is slated to get removed and libcdio will
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* use glib.h routines instead.
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*/
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#ifndef CDIO_BYTESEX_H_
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#define CDIO_BYTESEX_H_
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#include <cdio/types.h>
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#include <cdio/bytesex_asm.h> /* also defines CDIO_INLINE */
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#include <cdio/logging.h>
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/** 16-bit big-endian to little-endian */
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#define UINT16_SWAP_LE_BE_C(val) ((uint16_t) ( \
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(((uint16_t) (val) & (uint16_t) 0x00ffU) << 8) | \
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(((uint16_t) (val) & (uint16_t) 0xff00U) >> 8)))
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/** 32-bit big-endian to little-endian */
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#define UINT32_SWAP_LE_BE_C(val) ((uint32_t) ( \
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(((uint32_t) (val) & (uint32_t) 0x000000ffU) << 24) | \
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(((uint32_t) (val) & (uint32_t) 0x0000ff00U) << 8) | \
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(((uint32_t) (val) & (uint32_t) 0x00ff0000U) >> 8) | \
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(((uint32_t) (val) & (uint32_t) 0xff000000U) >> 24)))
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/** 64-bit big-endian to little-endian */
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#define UINT64_SWAP_LE_BE_C(val) ((uint64_t) ( \
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(((uint64_t) (val) & (uint64_t) UINT64_C(0x00000000000000ff)) << 56) | \
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(((uint64_t) (val) & (uint64_t) UINT64_C(0x000000000000ff00)) << 40) | \
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(((uint64_t) (val) & (uint64_t) UINT64_C(0x0000000000ff0000)) << 24) | \
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(((uint64_t) (val) & (uint64_t) UINT64_C(0x00000000ff000000)) << 8) | \
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(((uint64_t) (val) & (uint64_t) UINT64_C(0x000000ff00000000)) >> 8) | \
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(((uint64_t) (val) & (uint64_t) UINT64_C(0x0000ff0000000000)) >> 24) | \
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(((uint64_t) (val) & (uint64_t) UINT64_C(0x00ff000000000000)) >> 40) | \
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(((uint64_t) (val) & (uint64_t) UINT64_C(0xff00000000000000)) >> 56)))
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#ifndef UINT16_SWAP_LE_BE
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# define UINT16_SWAP_LE_BE UINT16_SWAP_LE_BE_C
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#endif
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#ifndef UINT32_SWAP_LE_BE
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# define UINT32_SWAP_LE_BE UINT32_SWAP_LE_BE_C
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#endif
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#ifndef UINT64_SWAP_LE_BE
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# define UINT64_SWAP_LE_BE UINT64_SWAP_LE_BE_C
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#endif
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static CDIO_INLINE
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uint16_t uint16_swap_le_be (const uint16_t val)
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{
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return UINT16_SWAP_LE_BE (val);
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}
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static CDIO_INLINE
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uint32_t uint32_swap_le_be (const uint32_t val)
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{
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return UINT32_SWAP_LE_BE (val);
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}
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static CDIO_INLINE
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uint64_t uint64_swap_le_be (const uint64_t val)
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{
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return UINT64_SWAP_LE_BE (val);
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}
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# define UINT8_TO_BE(val) ((uint8_t) (val))
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# define UINT8_TO_LE(val) ((uint8_t) (val))
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#ifdef WORDS_BIGENDIAN
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# define UINT16_TO_BE(val) ((uint16_t) (val))
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# define UINT16_TO_LE(val) ((uint16_t) UINT16_SWAP_LE_BE(val))
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# define UINT32_TO_BE(val) ((uint32_t) (val))
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# define UINT32_TO_LE(val) ((uint32_t) UINT32_SWAP_LE_BE(val))
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# define UINT64_TO_BE(val) ((uint64_t) (val))
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# define UINT64_TO_LE(val) ((uint64_t) UINT64_SWAP_LE_BE(val))
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#else
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# define UINT16_TO_BE(val) ((uint16_t) UINT16_SWAP_LE_BE(val))
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# define UINT16_TO_LE(val) ((uint16_t) (val))
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# define UINT32_TO_BE(val) ((uint32_t) UINT32_SWAP_LE_BE(val))
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# define UINT32_TO_LE(val) ((uint32_t) (val))
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# define UINT64_TO_BE(val) ((uint64_t) UINT64_SWAP_LE_BE(val))
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# define UINT64_TO_LE(val) ((uint64_t) (val))
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#endif
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/** symmetric conversions */
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#define UINT8_FROM_BE(val) (UINT8_TO_BE (val))
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#define UINT8_FROM_LE(val) (UINT8_TO_LE (val))
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#define UINT16_FROM_BE(val) (UINT16_TO_BE (val))
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#define UINT16_FROM_LE(val) (UINT16_TO_LE (val))
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#define UINT32_FROM_BE(val) (UINT32_TO_BE (val))
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#define UINT32_FROM_LE(val) (UINT32_TO_LE (val))
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#define UINT64_FROM_BE(val) (UINT64_TO_BE (val))
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#define UINT64_FROM_LE(val) (UINT64_TO_LE (val))
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/** converter function template */
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#define CVT_TO_FUNC(bits) \
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static CDIO_INLINE uint ## bits ## _t \
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uint ## bits ## _to_be (uint ## bits ## _t val) \
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{ return UINT ## bits ## _TO_BE (val); } \
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static CDIO_INLINE uint ## bits ## _t \
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uint ## bits ## _to_le (uint ## bits ## _t val) \
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{ return UINT ## bits ## _TO_LE (val); } \
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CVT_TO_FUNC(8)
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CVT_TO_FUNC(16)
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CVT_TO_FUNC(32)
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CVT_TO_FUNC(64)
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#undef CVT_TO_FUNC
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#define uint8_from_be(val) (uint8_to_be (val))
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#define uint8_from_le(val) (uint8_to_le (val))
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#define uint16_from_be(val) (uint16_to_be (val))
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#define uint16_from_le(val) (uint16_to_le (val))
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#define uint32_from_be(val) (uint32_to_be (val))
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#define uint32_from_le(val) (uint32_to_le (val))
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#define uint64_from_be(val) (uint64_to_be (val))
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#define uint64_from_le(val) (uint64_to_le (val))
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/** ISO9660-related field conversion routines */
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/** Convert from uint8_t to ISO 9660 7.1.1 format */
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#define to_711(i) uint8_to_le(i)
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/** Convert from ISO 9660 7.1.1 format to uint8_t */
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#define from_711(i) uint8_from_le(i)
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/** Convert from uint16_t to ISO 9669 7.2.1 format */
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#define to_721(i) uint16_to_le(i)
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/** Convert from ISO 9660 7.2.1 format to uint16_t */
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#define from_721(i) uint16_from_le(i)
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/** Convert from uint16_t to ISO 9669 7.2.2 format */
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#define to_722(i) uint16_to_be(i)
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/** Convert from ISO 9660 7.2.2 format to uint16_t */
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#define from_722(i) uint16_from_be(i)
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/** Convert from uint16_t to ISO 9669 7.2.3 format */
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static CDIO_INLINE uint32_t
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to_723(uint16_t i)
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{
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return uint32_swap_le_be(i) | i;
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}
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/** Convert from ISO 9660 7.2.3 format to uint16_t */
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static CDIO_INLINE uint16_t
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from_723 (uint32_t p)
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{
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if (uint32_swap_le_be (p) != p)
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cdio_warn ("from_723: broken byte order");
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return (0xFFFF & p);
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}
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/** Convert from uint16_t to ISO 9669 7.3.1 format */
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#define to_731(i) uint32_to_le(i)
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/** Convert from ISO 9660 7.3.1 format to uint32_t */
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#define from_731(i) uint32_from_le(i)
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/** Convert from uint32_t to ISO 9669 7.3.2 format */
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#define to_732(i) uint32_to_be(i)
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/** Convert from ISO 9660 7.3.2 format to uint32_t */
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#define from_732(i) uint32_from_be(i)
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/** Convert from uint16_t to ISO 9669 7.3.3 format */
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static CDIO_INLINE uint64_t
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to_733(uint32_t i)
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{
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return uint64_swap_le_be(i) | i;
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}
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/** Convert from ISO 9660 7.3.3 format to uint32_t */
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static CDIO_INLINE uint32_t
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from_733 (uint64_t p)
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{
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if (uint64_swap_le_be (p) != p)
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cdio_warn ("from_733: broken byte order");
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return (UINT32_C(0xFFFFFFFF) & p);
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}
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static CDIO_INLINE uint32_t
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from_733_with_err (uint64_t p, bool *err)
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{
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if (uint64_swap_le_be (p) != p) {
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cdio_warn ("from_733: broken byte order");
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*err = true;
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} else {
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*err = false;
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}
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return (UINT32_C(0xFFFFFFFF) & p);
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}
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#endif /* CDIO_BYTESEX_H_ */
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/*
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* Local variables:
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* c-file-style: "gnu"
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*/
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