//! Windows' per-code-unit uppercase mapping (`RtlUpcaseUnicodeChar`), a port //! of `std/os/windows/nls.zig` (`upcaseW` and its `uppercase_table`). //! //! The table is the locale-independent `l_intl.nls` data, unchanged since //! Windows 8.1 and therefore out of sync with the Unicode standard. Zig's //! `EnvMap` hashes and compares Windows environment keys with it, so this is //! what decides whether two keys name the same variable. /// This corresponds to the uppercase table within the locale-independent /// l_intl.nls data (found at system32\l_intl.nls). const UPPERCASE_TABLE: [u16; 2544] = [ 272, 288, 304, 320, 336, 352, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 368, 384, 400, 256, 416, 256, 256, 432, 256, 256, 256, 256, 256, 256, 256, 448, 464, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 480, 496, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 512, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 544, 560, 528, 528, 528, 576, 528, 528, 592, 608, 624, 640, 656, 672, 688, 704, 720, 736, 752, 768, 784, 800, 816, 832, 848, 864, 880, 896, 912, 928, 944, 960, 976, 992, 1008, 1024, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 1040, 528, 528, 1056, 528, 528, 1072, 1088, 1104, 1120, 1136, 1152, 528, 528, 528, 1168, 1184, 1200, 1216, 1232, 1248, 1264, 1280, 1296, 1312, 1328, 1344, 1360, 1376, 1392, 1408, 528, 528, 528, 1424, 1440, 1456, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 1472, 528, 528, 528, 528, 528, 528, 528, 528, 1488, 1504, 1520, 1536, 1552, 1568, 1584, 1600, 1616, 1632, 1648, 1664, 1680, 1696, 1712, 1728, 1744, 1760, 1776, 1792, 1808, 1824, 1840, 1856, 1872, 1888, 1904, 1920, 1936, 1952, 1968, 1984, 528, 528, 528, 528, 2000, 528, 528, 2016, 2032, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 2048, 2064, 528, 528, 528, 528, 2080, 2096, 2112, 2128, 2144, 2160, 2176, 2192, 2208, 2224, 2240, 2256, 528, 2272, 2288, 2304, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 2320, 2336, 2352, 528, 2368, 2384, 528, 528, 528, 528, 528, 528, 528, 528, 2400, 2416, 2432, 2448, 2464, 2480, 2496, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 2512, 2528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 528, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 0, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 121, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 65535, 0, 65535, 0, 65535, 0, 195, 0, 0, 65535, 0, 65535, 0, 0, 65535, 0, 0, 0, 65535, 0, 0, 0, 0, 0, 65535, 0, 0, 97, 0, 0, 0, 65535, 163, 0, 0, 0, 130, 0, 0, 65535, 0, 65535, 0, 65535, 0, 0, 65535, 0, 0, 0, 0, 65535, 0, 0, 65535, 0, 0, 0, 65535, 0, 65535, 0, 0, 65535, 0, 0, 0, 65535, 0, 56, 0, 0, 0, 0, 0, 0, 65534, 0, 0, 65534, 0, 0, 65534, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 65457, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 65534, 0, 65535, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 0, 0, 0, 0, 0, 65535, 0, 0, 0, 0, 0, 65535, 0, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 10783, 10780, 0, 65326, 65330, 0, 65331, 65331, 0, 65334, 0, 65333, 0, 0, 0, 0, 65331, 0, 0, 65329, 0, 0, 0, 0, 65327, 65325, 0, 10743, 0, 0, 0, 65325, 0, 10749, 65323, 0, 0, 65322, 0, 0, 0, 0, 0, 0, 0, 10727, 0, 0, 65318, 0, 0, 65318, 0, 0, 0, 0, 65318, 65467, 65319, 65319, 65465, 0, 0, 0, 0, 0, 65317, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65535, 0, 65535, 0, 0, 0, 65535, 0, 0, 0, 130, 130, 130, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65498, 65499, 65499, 65499, 0, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 0, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65472, 65473, 65473, 0, 0, 0, 0, 0, 0, 0, 0, 65528, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 7, 0, 0, 0, 0, 0, 65535, 0, 0, 65535, 0, 0, 0, 0, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65456, 65456, 65456, 65456, 65456, 65456, 65456, 65456, 65456, 65456, 65456, 65456, 65456, 65456, 65456, 65456, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 65521, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 35332, 0, 0, 0, 3814, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 8, 0, 8, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 74, 74, 86, 86, 86, 86, 100, 100, 128, 128, 112, 112, 126, 126, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65508, 0, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 0, 0, 0, 0, 65535, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 65510, 0, 0, 0, 0, 0, 0, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 65488, 0, 0, 65535, 0, 0, 0, 54741, 54744, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 0, 0, 0, 65535, 0, 0, 65535, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 58272, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65535, 0, 65535, 0, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 65535, 0, 0, 0, 0, 65535, 0, 0, 0, 0, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 65504, 0, 0, 0, 0, 0, ]; /// Cross-platform implementation of `ntdll.RtlUpcaseUnicodeChar`. /// Transforms the UTF-16 code unit in `c` to its uppercased version if there /// is one. Otherwise, returns `c` unmodified. #[must_use] pub fn upcase_w(c: u16) -> u16 { if c < u16::from(b'a') { return c; } if c <= u16::from(b'z') { return c - (u16::from(b'a') - u16::from(b'A')); } if c >= 0xC0 { let mut offset: u16 = 0; offset = offset.wrapping_add(u16::from((c >> 8) as u8)); offset = UPPERCASE_TABLE[usize::from(offset)]; offset = offset.wrapping_add((c >> 4) & 0xF); offset = UPPERCASE_TABLE[usize::from(offset)]; offset = offset.wrapping_add(c & 0xF); offset = UPPERCASE_TABLE[usize::from(offset)]; return c.wrapping_add(offset); } c } #[cfg(test)] mod tests { use super::upcase_w; #[test] fn ascii_and_latin() { assert_eq!(upcase_w(u16::from(b'a')), u16::from(b'A')); assert_eq!(upcase_w(u16::from(b'Z')), u16::from(b'Z')); assert_eq!(upcase_w(u16::from(b'_')), u16::from(b'_')); assert_eq!(upcase_w(0xE9), 0xC9); // e acute assert_eq!(upcase_w(0xFF), 0x178); // y diaeresis assert_eq!(upcase_w(0xDF), 0xDF); // sharp s has no simple uppercase } #[test] fn matches_the_windows_table_not_modern_unicode() { // Windows folds the Greek prosgegrammeni forms U+1F80 -> U+1F88. assert_eq!(upcase_w(0x1F88), 0x1F88); assert_eq!(upcase_w(0x1F80), 0x1F88); // U+1E9E (capital sharp s) and U+A64A-era additions are unchanged. assert_eq!(upcase_w(0x1E9E), 0x1E9E); // Georgian Mtavruli (U+1C90) is newer than the table: its lowercase // U+10D0 maps to nothing under Windows but to U+1C90 in Unicode. assert_eq!(upcase_w(0x10D0), 0x10D0); // Surrogate halves are untouched. assert_eq!(upcase_w(0xD800), 0xD800); assert_eq!(upcase_w(0xDFFF), 0xDFFF); } }