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Optimize padding

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This commit is contained in:
Victor Zverovich 2021-03-10 17:59:36 -08:00
parent 605b603735
commit 05bc87a66f
1 changed files with 4 additions and 4 deletions
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8
include/fmt/format.h
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@ -1612,14 +1612,14 @@ FMT_CONSTEXPR OutputIt write_padded(OutputIt out,
static_assert(align == align::left || align == align::right, "");
unsigned spec_width = to_unsigned(specs.width);
size_t padding = spec_width > width ? spec_width - width : 0;
size_t left_padding = 0;
auto* shifts = align == align::left ? data::left_padding_shifts
: data::right_padding_shifts;
left_padding = padding >> shifts[specs.align];
size_t left_padding = padding >> shifts[specs.align];
size_t right_padding = padding - left_padding;
auto it = reserve(out, size + padding * specs.fill.size());
it = fill(it, left_padding, specs.fill);
if (left_padding != 0) it = fill(it, left_padding, specs.fill);
it = f(it);
it = fill(it, padding - left_padding, specs.fill);
if (right_padding != 0) it = fill(it, padding - left_padding, specs.fill);
return base_iterator(out, it);
}