| 1 | /* |
| 2 | * This file is part of secnet. |
| 3 | * See README for full list of copyright holders. |
| 4 | * |
| 5 | * secnet is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version d of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * secnet is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * version 3 along with secnet; if not, see |
| 17 | * https://www.gnu.org/licenses/gpl.html. |
| 18 | */ |
| 19 | |
| 20 | #ifndef fake_mLib_bits_h |
| 21 | #define fake_mLib_bits_h |
| 22 | |
| 23 | /* The <mLib/bits.h> header defines a large number of types and macros for |
| 24 | * various kinds of bithacking. Notably, it has machinery for autodetecting |
| 25 | * suitable types holding (at least) various numbers of bits -- a service |
| 26 | * which C99 provides through other means. |
| 27 | * |
| 28 | * This file provides a small portion of the <mLib/bits.h> interface, just |
| 29 | * enough to make the pieces of code lifted from Catacomb feel at home. |
| 30 | */ |
| 31 | |
| 32 | #include <stdint.h> |
| 33 | #include "u64.h" |
| 34 | #include "unaligned.h" |
| 35 | |
| 36 | typedef uint8_t octet; |
| 37 | typedef uint32_t uint32; |
| 38 | typedef uint64_t uint64; |
| 39 | |
| 40 | typedef int32_t int32; |
| 41 | typedef int64_t int64; |
| 42 | |
| 43 | #define LOAD32_L(p) (get_uint32_le(p)) |
| 44 | #define LOAD32_B(p) (get_uint32(p)) |
| 45 | #define STORE32_L(p, x) put_uint32_le((p), (x)) |
| 46 | #define STORE32_B(p, x) put_uint32((p), (x)) |
| 47 | #define ROL32(x, n) ((n) ? ((x) << (n) | (x) >> (32 - (n))) : (x)) |
| 48 | |
| 49 | #define MASK32 0xffffffffu |
| 50 | #define U32(x) ((uint32)(x) & MASK32) |
| 51 | |
| 52 | typedef u64 kludge64; |
| 53 | #define X64(hi, lo) u64init(0x##hi, 0x##lo) |
| 54 | #define HI64(x) u64gethi(x) |
| 55 | #define LO64(x) u64getlo(x) |
| 56 | #define LOAD64_L_(x, p) do { \ |
| 57 | const uint8_t *p_ = (const uint8_t *)(p); \ |
| 58 | uint32_t lo_ = LOAD32_L(p_ + 0), hi_ = LOAD32_L(p_ + 4); \ |
| 59 | (x) = u64hilo(hi_, lo_); \ |
| 60 | } while (0) |
| 61 | #define LOAD64_B_(x, p) do { \ |
| 62 | const uint8_t *p_ = (const uint8_t *)(p); \ |
| 63 | uint32_t hi_ = LOAD32_B(p_ + 0), lo_ = LOAD32_B(p_ + 4); \ |
| 64 | (x) = u64hilo(hi_, lo_); \ |
| 65 | } while (0) |
| 66 | #define STORE64_L_(p, x) do { \ |
| 67 | uint8_t *p_ = (uint8_t *)(p); \ |
| 68 | uint32_t lo_ = LO64(x), hi_ = HI64(x); \ |
| 69 | STORE32_L(p_ + 0, lo_); STORE32_L(p_ + 4, hi_); \ |
| 70 | } while (0) |
| 71 | #define STORE64_B_(p, x) do { \ |
| 72 | uint8_t *p_ = (uint8_t *)(p); \ |
| 73 | uint32_t lo_ = LO64(x), hi_ = HI64(x); \ |
| 74 | STORE32_B(p_ + 0, hi_); STORE32_B(p_ + 4, lo_); \ |
| 75 | } while (0) |
| 76 | #define SET64(z, hi, lo) ((z) = u64hilo((hi), (lo))) |
| 77 | #define AND64(z, x, y) ((z) = u64and((x), (y))) |
| 78 | #define OR64(z, x, y) ((z) = u64or((x), (y))) |
| 79 | #define XOR64(z, x, y) ((z) = u64xor((x), (y))) |
| 80 | #define CPL64(z, x) ((z) = u64not((x))) |
| 81 | #define ROL64_(z, x, n) ((n) ? (z) = u64rol((x), (n)) : (x)) |
| 82 | |
| 83 | #endif /* fake_mLib_bits_h */ |