language-servers/roc
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Merge remote-tracking branch 'origin/trunk' into update_zig_09

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Folkert 2022-04-06 14:48:04 +02:00
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31
compiler/builtins/bitcode/src/dec.zig
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@ -26,21 +26,19 @@ pub const RocDec = extern struct {
return .{ .num = num * one_point_zero_i128 };
}
// TODO: There's got to be a better way to do this other than converting to Str
pub fn fromF64(num: f64) ?RocDec {
var digit_bytes: [19]u8 = undefined; // 19 = max f64 digits + '.' + '-'
var result: f64 = num * comptime @intToFloat(f64, one_point_zero_i128);
var fbs = std.io.fixedBufferStream(digit_bytes[0..]);
std.fmt.formatFloatDecimal(num, .{}, fbs.writer()) catch
return null;
var dec = RocDec.fromStr(RocStr.init(&digit_bytes, fbs.pos));
if (dec) |d| {
return d;
} else {
if (result > comptime @intToFloat(f64, math.maxInt(i128))) {
return null;
}
if (result < comptime @intToFloat(f64, math.minInt(i128))) {
return null;
}
var ret: RocDec = .{ .num = @floatToInt(i128, result) };
return ret;
}
pub fn fromStr(roc_str: RocStr) ?RocDec {
@ -729,6 +727,11 @@ test "fromF64" {
try expectEqual(RocDec{ .num = 25500000000000000000 }, dec.?);
}
test "fromF64 overflow" {
var dec = RocDec.fromF64(1e308);
try expectEqual(dec, null);
}
test "fromStr: empty" {
var roc_str = RocStr.init("", 0);
var dec = RocDec.fromStr(roc_str);
@ -898,11 +901,11 @@ test "toStr: -0.00045" {
try expectEqualSlices(u8, res_slice, res_roc_str.?.asSlice());
}
test "toStr: -111.123456789" {
var dec: RocDec = .{ .num = -111123456789000000000 };
test "toStr: -111.123456" {
var dec: RocDec = .{ .num = -111123456000000000000 };
var res_roc_str = dec.toStr();
const res_slice: []const u8 = "-111.123456789"[0..];
const res_slice: []const u8 = "-111.123456"[0..];
try expectEqualSlices(u8, res_slice, res_roc_str.?.asSlice());
}