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stdio: optimize readln algorithm for non-char type #7681

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Merged
dlang-bot merged 1 commit into from
Oct 28, 2020
Merged

stdio: optimize readln algorithm for non-char type #7681

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15 changes: 10 additions & 5 deletions std/stdio.d
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Original file line number Diff line number Diff line change
Expand Up @@ -1846,14 +1846,19 @@ is recommended if you want to process a complete file.
}
else
{
// TODO: optimize this
string s = readln(terminator);
buf.length = 0;
if (!s.length) return 0;
foreach (C c; s)
if (!s.length)
{
buf ~= c;
buf = buf[0 .. 0];
return 0;
}

import std.utf : codeLength;
buf.length = codeLength!C(s);
size_t idx;
foreach (C c; s)
buf[idx++] = c;

return buf.length;
}
}
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