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long.zig
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long.zig
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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
const std = @import("std");
const py = @import("../pydust.zig");
const PyObjectMixin = @import("./obj.zig").PyObjectMixin;
const ffi = py.ffi;
const PyError = @import("../errors.zig").PyError;
/// Wrapper for Python PyLong.
/// See: https://docs.python.org/3/c-api/long.html#c.PyLongObject
pub const PyLong = extern struct {
obj: py.PyObject,
pub usingnamespace PyObjectMixin("int", "PyLong", @This());
pub fn create(value: anytype) !PyLong {
if (@TypeOf(value) == comptime_int) {
return create(@as(i64, @intCast(value)));
}
const typeInfo = @typeInfo(@TypeOf(value)).Int;
const pylong = switch (typeInfo.signedness) {
.signed => ffi.PyLong_FromLongLong(@intCast(value)),
.unsigned => ffi.PyLong_FromUnsignedLongLong(@intCast(value)),
} orelse return PyError.PyRaised;
return .{ .obj = .{ .py = pylong } };
}
pub fn as(self: PyLong, comptime T: type) !T {
// TODO(ngates): support non-int conversions
const typeInfo = @typeInfo(T).Int;
return switch (typeInfo.signedness) {
.signed => {
const ll = ffi.PyLong_AsLongLong(self.obj.py);
if (ffi.PyErr_Occurred() != null) return PyError.PyRaised;
return @intCast(ll);
},
.unsigned => {
const ull = ffi.PyLong_AsUnsignedLongLong(self.obj.py);
if (ffi.PyErr_Occurred() != null) return PyError.PyRaised;
return @intCast(ull);
},
};
}
};
test "PyLong" {
py.initialize();
defer py.finalize();
const pl = try PyLong.create(100);
defer pl.decref();
try std.testing.expectEqual(@as(c_long, 100), try pl.as(c_long));
try std.testing.expectEqual(@as(c_ulong, 100), try pl.as(c_ulong));
const neg_pl = try PyLong.create(@as(c_long, -100));
defer neg_pl.decref();
try std.testing.expectError(
PyError.PyRaised,
neg_pl.as(c_ulong),
);
}