vasilito
068a1ca63e
Bootloader fork rebase:
- Base changed from 0.1.0 pre-patched archive to upstream 1.0.0 tag (c7eeb9f)
- Applied 0001-redbear-local-forks.patch (Cargo.toml crate path redirects)
- Applied fix-uefi-alloc-panic.patch equivalents (4 panic!() -> graceful
error handling in src/main.rs)
- Applied P5-live-preload-cap-1gib.patch (1 GiB cap on live image preload)
- Skipped: P0 GPT partition scan (requires new module + integration),
P1 timeout/default-resolution, P2 live preload guard (subsumed by
panic fixes + cap), P3 live image safe read, P4 large ISO boot,
redox.patch — to be applied in dedicated rebase session.
firmware-loader/Cargo.toml: version 0.1.0 -> 0.3.0 (sync with other
Red Bear custom crates which are at 0.3.0).
fork-upstream-map.toml: bootloader back from PENDING_REBASE to 1.0.0
since the partial rebase matches upstream 1.0.0 content.
fork-upstream-map.toml: base restored to 'main' tracked (was correctly
tracked by build-redbear.sh).
151 lines
4.6 KiB
C
151 lines
4.6 KiB
C
/* bitrotate.h - Rotate bits in integers
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Copyright (C) 2008-2025 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Simon Josefsson <simon@josefsson.org>, 2008. */
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#ifndef _GL_BITROTATE_H
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#define _GL_BITROTATE_H
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/* This file uses _GL_INLINE_HEADER_BEGIN, _GL_INLINE. */
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#if !_GL_CONFIG_H_INCLUDED
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#error "Please include config.h first."
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#endif
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#include <limits.h>
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#include <stdint.h>
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#include <sys/types.h>
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_GL_INLINE_HEADER_BEGIN
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#ifndef BITROTATE_INLINE
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# define BITROTATE_INLINE _GL_INLINE
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef UINT64_MAX
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/* Given an unsigned 64-bit argument X, return the value corresponding
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to rotating the bits N steps to the left. N must be between 1 and
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63 inclusive. */
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BITROTATE_INLINE uint64_t
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rotl64 (uint64_t x, int n)
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{
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return ((x << n) | (x >> (64 - n))) & UINT64_MAX;
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}
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/* Given an unsigned 64-bit argument X, return the value corresponding
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to rotating the bits N steps to the right. N must be between 1 to
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63 inclusive.*/
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BITROTATE_INLINE uint64_t
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rotr64 (uint64_t x, int n)
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{
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return ((x >> n) | (x << (64 - n))) & UINT64_MAX;
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}
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#endif
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/* Given an unsigned 32-bit argument X, return the value corresponding
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to rotating the bits N steps to the left. N must be between 1 and
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31 inclusive. */
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BITROTATE_INLINE uint32_t
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rotl32 (uint32_t x, int n)
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{
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return ((x << n) | (x >> (32 - n))) & UINT32_MAX;
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}
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/* Given an unsigned 32-bit argument X, return the value corresponding
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to rotating the bits N steps to the right. N must be between 1 to
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31 inclusive.*/
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BITROTATE_INLINE uint32_t
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rotr32 (uint32_t x, int n)
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{
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return ((x >> n) | (x << (32 - n))) & UINT32_MAX;
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}
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/* Given a size_t argument X, return the value corresponding
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to rotating the bits N steps to the left. N must be between 1 and
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(CHAR_BIT * sizeof (size_t) - 1) inclusive. */
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BITROTATE_INLINE size_t
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rotl_sz (size_t x, int n)
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{
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return ((x << n) | (x >> ((CHAR_BIT * sizeof x) - n))) & SIZE_MAX;
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}
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/* Given a size_t argument X, return the value corresponding
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to rotating the bits N steps to the right. N must be between 1 to
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(CHAR_BIT * sizeof (size_t) - 1) inclusive. */
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BITROTATE_INLINE size_t
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rotr_sz (size_t x, int n)
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{
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return ((x >> n) | (x << ((CHAR_BIT * sizeof x) - n))) & SIZE_MAX;
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}
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/* Given an unsigned 16-bit argument X, return the value corresponding
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to rotating the bits N steps to the left. N must be between 1 to
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15 inclusive, but on most relevant targets N can also be 0 and 16
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because 'int' is at least 32 bits and the arguments must widen
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before shifting. */
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BITROTATE_INLINE uint16_t
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rotl16 (uint16_t x, int n)
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{
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return (((unsigned int) x << n) | ((unsigned int) x >> (16 - n)))
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& UINT16_MAX;
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}
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/* Given an unsigned 16-bit argument X, return the value corresponding
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to rotating the bits N steps to the right. N must be in 1 to 15
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inclusive, but on most relevant targets N can also be 0 and 16
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because 'int' is at least 32 bits and the arguments must widen
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before shifting. */
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BITROTATE_INLINE uint16_t
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rotr16 (uint16_t x, int n)
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{
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return (((unsigned int) x >> n) | ((unsigned int) x << (16 - n)))
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& UINT16_MAX;
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}
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/* Given an unsigned 8-bit argument X, return the value corresponding
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to rotating the bits N steps to the left. N must be between 1 to 7
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inclusive, but on most relevant targets N can also be 0 and 8
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because 'int' is at least 32 bits and the arguments must widen
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before shifting. */
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BITROTATE_INLINE uint8_t
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rotl8 (uint8_t x, int n)
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{
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return (((unsigned int) x << n) | ((unsigned int) x >> (8 - n))) & UINT8_MAX;
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}
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/* Given an unsigned 8-bit argument X, return the value corresponding
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to rotating the bits N steps to the right. N must be in 1 to 7
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inclusive, but on most relevant targets N can also be 0 and 8
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because 'int' is at least 32 bits and the arguments must widen
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before shifting. */
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BITROTATE_INLINE uint8_t
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rotr8 (uint8_t x, int n)
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{
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return (((unsigned int) x >> n) | ((unsigned int) x << (8 - n))) & UINT8_MAX;
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}
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#ifdef __cplusplus
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}
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#endif
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_GL_INLINE_HEADER_END
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#endif /* _GL_BITROTATE_H */
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