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micro optimize scoped_padder

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This commit is contained in:
gabime 2018-11-11 00:31:14 +02:00
parent 3ff541cf77
commit 3cdf2b7f04
1 changed files with 12 additions and 24 deletions
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36
include/spdlog/details/pattern_formatter.h
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@ -48,31 +48,29 @@ struct padding_info
class scoped_pad
{
public:
static const size_t max_width = 128;
scoped_pad(size_t wrapped_size, padding_info &padinfo, fmt::memory_buffer &dest):
padinfo_(padinfo)
, dest_(dest)
, nchars_(padinfo_.width_ > wrapped_size ? padinfo_.width_ - wrapped_size : 0)
{
if(nchars_ == 0)
if(padinfo_.width_ <= wrapped_size)
{
nchars_ = 0;
return;
}
nchars_= padinfo.width_ - wrapped_size;
if (padinfo_.side_ == padding_info::left)
{
pad_it(nchars_);
nchars_ = 0;
return;
}
else if(padinfo_.side_ == padding_info::center)
{
pad_it(nchars_/ 2);
return;
auto half_chars = nchars_/ 2;
auto reminder = nchars_ % 2;
pad_it(half_chars);
nchars_= half_chars + reminder; //for the right side
}
}
@ -83,27 +81,17 @@ public:
~scoped_pad()
{
if(nchars_ == 0)
{
return;
}
if (padinfo_.side_ == padding_info::right)
if(nchars_)
{
pad_it(nchars_);
}
else // padinfo_.side_ == padding_info::center
{
pad_it( (nchars_/ 2) + (nchars_% 2) ) ;
}
}
private:
void pad_it(size_t count)
{
//count = std::min(count, spaces_.size());
assert(count <= spaces_.size());
fmt_helper::append_string_view(string_view_t(spaces_.data(), count), dest_);
}
@ -112,7 +100,7 @@ private:
fmt::memory_buffer &dest_;
size_t nchars_;
string_view_t spaces_ = " "
" ";
" ";
};
class flag_formatter
@ -1083,7 +1071,7 @@ private:
{
using details::padding_info;
using details::scoped_pad;
const size_t max_width = 128;
if (it == end)
{
return padding_info();
@ -1116,7 +1104,7 @@ private:
auto digit = static_cast<size_t>(*it - '0');
width = width * 10 + digit;
}
return details::padding_info{std::min(width, scoped_pad::max_width), side};
return details::padding_info{std::min(width, max_width), side};
}
void compile_pattern_(const std::string &pattern)