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Code Issues 123 Wiki Activity

Simplify len_common_prefix

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docentYT
2026-05-01 13:57:33 +02:00
parent 664c340d84
commit 9c27b54960
4 changed files with 6 additions and 9 deletions
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9
utilities/utilities.cpp
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@@ -398,13 +398,10 @@ std::string_view substr_path(std::string const &Filename)
}
// returns length of common prefix between two provided strings
std::ptrdiff_t len_common_prefix(std::string const &Left, std::string const &Right)
std::ptrdiff_t len_common_prefix(std::string_view a, std::string_view b)
{
auto const *left{Left.data()};
auto const *right{Right.data()};
// compare up to the length of the shorter string
return (Right.size() <= Left.size() ? std::distance(right, std::mismatch(right, right + Right.size(), left).first) : std::distance(left, std::mismatch(left, left + Left.size(), right).first));
auto [it1, it2] = std::ranges::mismatch(a, b);
return std::distance(a.begin(), it1);
}
// returns true if provided string ends with another provided string