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fix comptime float formatting

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Closes #19379
Closes #18046
This commit is contained in:
Marc Tiehuis 2024-03-24 12:53:08 +13:00 committed by Veikka Tuominen
parent e90583f5d1
commit 091aa54a3e
2 changed files with 4 additions and 2 deletions
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2
lib/std/fmt.zig
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@ -1839,6 +1839,8 @@ test comptimePrint {
try std.testing.expectEqualSlices(u8, "100", comptimePrint("{}", .{100}));
try std.testing.expectEqualStrings("30", comptimePrint("{d}", .{30.0}));
try std.testing.expectEqualStrings("30.0", comptimePrint("{d:3.1}", .{30.0}));
try std.testing.expectEqualStrings("0.05", comptimePrint("{d}", .{0.05}));
try std.testing.expectEqualStrings("5e-2", comptimePrint("{e}", .{0.05}));
}
test "parse u64 digit too big" {

4
lib/std/fmt/format_float.zig
View File

@ -270,9 +270,9 @@ pub fn formatDecimal(buf: []u8, f_: FloatDecimal128, precision: ?usize) FormatEr
// fixed bound: leading_digit(1) + point(1)
const req_bytes = if (f.exponent >= 0)
2 + @abs(f.exponent) + olength + (precision orelse 0)
@as(usize, 2) + @abs(f.exponent) + olength + (precision orelse 0)
else
2 + @max(@abs(f.exponent) + olength, precision orelse 0);
@as(usize, 2) + @max(@abs(f.exponent) + olength, precision orelse 0);
if (buf.len < req_bytes) {
return error.BufferTooSmall;
}