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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| const std = @import("std"); | ||
| const BN254Fr = @import("bn254/fr.zig"); | ||
|
|
||
| const BN254W2 = PoseidonParameters( | ||
| BN254Fr, | ||
| 2, | ||
| 4, | ||
| 56, | ||
| @embedFile("bn254/optimized_poseidon_constants.json"), | ||
| ); | ||
|
|
||
| fn PoseidonParameters( | ||
| comptime ScalarField: type, | ||
| comptime w: u8, | ||
| comptime partial_rounds: u8, | ||
| comptime half_full_rounds: u8, | ||
| comptime json_spec: []const u8, | ||
| ) type { | ||
| _ = half_full_rounds; | ||
| _ = partial_rounds; | ||
| _ = w; | ||
| _ = ScalarField; | ||
| var alloc_buf: [10 * (1 << 20)]u8 = undefined; | ||
| var fba = std.heap.FixedBufferAllocator.init(&alloc_buf); | ||
| var allocator = fba.allocator(); | ||
|
|
||
| const ParametersJSON = struct { | ||
| C: [][][]const u8, | ||
| M: [][][][]const u8, | ||
| P: [][][][]const u8, | ||
| S: [][][]const u8, | ||
| }; | ||
| var parameters = try std.json.parseFromSliceLeaky( | ||
| ParametersJSON, | ||
| allocator, | ||
| json_spec, | ||
| .{}, | ||
| ); | ||
| defer parameters.deinit(); | ||
|
|
||
| // if (w - 2 >= parameters.C.len) { | ||
| // @compileError("width isn't supported"); | ||
| // } | ||
| // const _Fr = ScalarField; | ||
|
|
||
| // const Parameters = struct { | ||
| // C: [w * (half_full_rounds + 1) + partial_rounds + (half_full_rounds - 1) * w]_Fr.MontgomeryDomainFieldElement, | ||
| // M: [w][w]_Fr.MontgomeryDomainFieldElement, | ||
| // P: [w][w]_Fr.MontgomeryDomainFieldElement, | ||
| // S: [(w + (w - 1)) * partial_rounds]_Fr.MontgomeryDomainFieldElement, | ||
| // }; | ||
| // const ret: Parameters = undefined; | ||
|
|
||
| // const i = w; | ||
| // for (0..parameters.value.C[i].len) |j| { | ||
| // var fe = try std.fmt.parseInt(u256, parameters.value.C[i][j], 0); | ||
| // var buf: [32]u8 = undefined; | ||
| // std.mem.writeIntLittle(@TypeOf(fe), &buf, fe); | ||
| // _Fr.fromBytes(&ret.C[i][j], buf); | ||
| // _Fr.toMontgomery(&ret.C[i][j], ret.C[i][j]); | ||
| // } | ||
|
|
||
| // for (0..parameters.value.M[i].len) |j| { | ||
| // for (0..parameters.value.M[i][j].len) |k| { | ||
| // var fe = try std.fmt.parseInt(u256, parameters.value.M[i][j][k], 0); | ||
| // var buf: [32]u8 = undefined; | ||
| // std.mem.writeIntLittle(@TypeOf(fe), &buf, fe); | ||
| // _Fr.fromBytes(&ret.M[i][j][k], buf); | ||
| // _Fr.toMontgomery(&ret.M[i][j][k], ret.M[i][j][k]); | ||
| // } | ||
| // } | ||
|
|
||
| // for (0..parameters.value.P[i].len) |j| { | ||
| // for (0..parameters.value.P[i][j].len) |k| { | ||
| // var fe = try std.fmt.parseInt(u256, parameters.value.P[i][j][k], 0); | ||
| // var buf: [32]u8 = undefined; | ||
| // std.mem.writeIntLittle(@TypeOf(fe), &buf, fe); | ||
| // _Fr.fromBytes(&ret.P[i][j][k], buf); | ||
| // _Fr.toMontgomery(&ret.P[i][j][k], ret.P[i][j][k]); | ||
| // } | ||
| // } | ||
|
|
||
| // for (0..parameters.value.S[i].len) |j| { | ||
| // var fe = try std.fmt.parseInt(u256, parameters.value.S[i][j], 0); | ||
| // var buf: [32]u8 = undefined; | ||
| // std.mem.writeIntLittle(@TypeOf(fe), &buf, fe); | ||
| // _Fr.fromBytes(&ret.S[i][j], buf); | ||
| // _Fr.toMontgomery(&ret.S[i][j], ret.S[i][j]); | ||
| // } | ||
|
|
||
| // return struct { | ||
| // const Fr = _Fr; | ||
| // const MontFr = Fr.MontgomeryDomainFieldElement; | ||
| // const NonMontFr = Fr.NonMontgomeryDomainFieldElement; | ||
|
|
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| // const width = w; | ||
| // const F_r: u8 = partial_rounds; | ||
| // const F_P: u8 = half_full_rounds; | ||
|
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||
| // const C: [w * (half_full_rounds + 1) + partial_rounds + (half_full_rounds - 1) * w]MontFr = ret.C; | ||
| // const M: [w][w]MontFr = ret.M; | ||
| // const P: [w][w]MontFr = ret.P; | ||
| // const S: [(w + (w - 1)) * partial_rounds]MontFr = ret.S; | ||
| // }; | ||
| return struct {}; | ||
| } | ||
|
|
||
| test "l" { | ||
| comptime { | ||
| var alloc_buf: [10 * (1 << 20)]u8 = undefined; | ||
| var fba = std.heap.FixedBufferAllocator.init(&alloc_buf); | ||
| const Test = struct { | ||
| C: [][]const u8, | ||
| }; | ||
| const foo = try std.json.parseFromSliceLeaky( | ||
| Test, | ||
| fba.allocator(), | ||
| "{ \"C\": [[1, 2, 3]] }", | ||
| .{}, | ||
| ); | ||
| _ = foo; | ||
| } | ||
|
|
||
| // _ = BN254W2; | ||
| } |