| // Copyright 2023 The Wuffs Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // https://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| // |
| // SPDX-License-Identifier: Apache-2.0 OR MIT |
| |
| // -------- |
| |
| // Quirks are discussed in (/doc/note/quirks.md). |
| // |
| // The base38 encoding of "lzma" is 0x13_3A15. Left shifting by 10 gives |
| // 0x4CE8_5400. |
| pri const QUIRKS_BASE : base.u32 = 0x4CE8_5400 |
| |
| // -------- |
| |
| // When this quirk is set, a positive or zero value ignores or enforces the "If |
| // initial byte [after properties or other headers] is not equal to ZERO, the |
| // LZMA Decoder must stop decoding and report error" from the spec |
| // https://raw.githubusercontent.com/jljusten/LZMA-SDK/781863cdf592da3e97420f50de5dac056ad352a5/DOC/lzma-specification.txt |
| pub const QUIRK_ALLOW_NON_ZERO_INITIAL_BYTE : base.u32 = 0x4CE8_5400 | 0x00 |
| |
| // When this quirk is set, a positive value indicates an extension to the LZMA |
| // format. Zero means to use the default LZMA format. |
| // |
| // When positive, the low byte of the u64 value indicates the extension. |
| // Currently, the only valid extensions are: |
| // - 0x01 indicates Lzip. |
| // - 0x02 indicates LZMA2. |
| // |
| // For Lzip, the high 7 bytes (shifted right by 8) must be less than or equal |
| // to 0xFF and indicates the dictionary size. See section "6 File format" of |
| // https://www.nongnu.org/lzip/manual/lzip_manual.html |
| // |
| // For LZMA2, the high 7 bytes (shifted right by 8) must be less than or equal |
| // to 40 and indicates the dictionary size. See section "5.3.1. LZMA2" of |
| // https://tukaani.org/xz/xz-file-format.txt |
| pub const QUIRK_FORMAT_EXTENSION : base.u32 = 0x4CE8_5400 | 0x01 |
