ffa5a92ef0
I dunno what happened, I was just applying some FloatFree(tm) and then all of this appeared out of nowhere!
35 lines
1.1 KiB
Zig
35 lines
1.1 KiB
Zig
const std = @import("std");
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const C = @cImport({
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// include the headers you need for testing here
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// also make sure to add the corresponding source files in build.zig until
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// the symbol errors go away :face_holding_back_tears:
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@cInclude("m_fixed.h");
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});
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const fixed_t = i32;
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const FRACUNIT: fixed_t = 65536;
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const FRACBITS = 16;
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test "FixedSqrt d_main.cpp"
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{
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try std.testing.expectEqual(C.FixedSqrt(0x7FFF0000), C.FixedSqrt64(0x7FFF0000));
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try std.testing.expectEqual(C.FixedSqrt(0x40000), C.FixedSqrt64(0x40000));
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// You should probably generate the weird number with RANDOM.org
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const WEIRDNUMBER = 3886284; // 59.3 fracunits; this should approximate to around 7
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try std.testing.expectEqual(C.FixedSqrt(WEIRDNUMBER), C.FixedSqrt64(WEIRDNUMBER));
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}
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test "FixedSqrt m_fixed.c"
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{
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var a: i64 = 0;
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// not enough time in the world for all 2 billion values...
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// prime numbers to the rescue
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while (a <= std.math.maxInt(i32)) : (a += 97) {
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const c: fixed_t = C.FixedSqrt(@intCast(a));
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const d: fixed_t = @intFromFloat(@sqrt(@as(f64, @floatFromInt(a)) / FRACUNIT) * FRACUNIT);
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try std.testing.expect(@abs(c - d) <= 1);
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}
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}
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