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Use a smaller type for string lengths.

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King_DuckZ 2017-05-15 23:41:47 +01:00
parent 8585e5baf5
commit 0c7d08e299
1 changed files with 12 additions and 9 deletions
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21
src/tawashi_implem/string_lengths.hpp
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@ -21,36 +21,39 @@
#include "sprout/cstring/strlen.hpp" #include "sprout/cstring/strlen.hpp"
#include "duckhandy/sequence_bt.hpp" #include "duckhandy/sequence_bt.hpp"
#include <cstddef> #include <cstddef>
#include <cstdint>
namespace tawashi { namespace tawashi {
typedef uint16_t string_length_type;
namespace implem { namespace implem {
template <std::size_t I, std::size_t S> template <std::size_t I, std::size_t S>
inline constexpr std::size_t string_length_at_index (const sprout::array<const char*, S>& parStrings) { inline constexpr string_length_type string_length_at_index (const sprout::array<const char*, S>& parStrings) {
return sprout::strlen(parStrings[I]); return static_cast<string_length_type>(sprout::strlen(parStrings[I]));
} }
template <std::size_t... Indices> template <std::size_t... Indices>
inline constexpr sprout::array<std::size_t, sizeof...(Indices)> string_lengths (const sprout::array<const char*, sizeof...(Indices)>& parStrings, dhandy::bt::index_seq<Indices...>) { inline constexpr sprout::array<string_length_type, sizeof...(Indices)> string_lengths (const sprout::array<const char*, sizeof...(Indices)>& parStrings, dhandy::bt::index_seq<Indices...>) {
return sprout::array<std::size_t, sizeof...(Indices)> { return sprout::array<string_length_type, sizeof...(Indices)> {
string_length_at_index<Indices>(parStrings)... string_length_at_index<Indices>(parStrings)...
}; };
} }
template <typename Enum, std::size_t... Indices> template <typename Enum, std::size_t... Indices>
inline constexpr sprout::array<std::size_t, Enum::_size()> string_lengths (const typename Enum::_name_iterable& parEnumIterable, dhandy::bt::index_seq<Indices...>) { inline constexpr sprout::array<string_length_type, Enum::_size()> string_lengths (const typename Enum::_name_iterable& parEnumIterable, dhandy::bt::index_seq<Indices...>) {
return sprout::array<std::size_t, Enum::_size()> { return sprout::array<string_length_type, Enum::_size()> {
sprout::strlen(parEnumIterable[Indices])... static_cast<string_length_type>(sprout::strlen(parEnumIterable[Indices]))...
}; };
} }
} //namespace implem } //namespace implem
template <std::size_t S> template <std::size_t S>
inline constexpr sprout::array<std::size_t, S> string_lengths (const sprout::array<const char*, S>& parStrings) { inline constexpr sprout::array<string_length_type, S> string_lengths (const sprout::array<const char*, S>& parStrings) {
return implem::string_lengths(parStrings, dhandy::bt::index_range<0, S>()); return implem::string_lengths(parStrings, dhandy::bt::index_range<0, S>());
} }
template <typename Enum> template <typename Enum>
inline constexpr sprout::array<std::size_t, Enum::_size()> string_lengths() { inline constexpr sprout::array<string_length_type, Enum::_size()> string_lengths() {
return implem::string_lengths<Enum>(Enum::_names(), dhandy::bt::index_range<0, Enum::_size()>()); return implem::string_lengths<Enum>(Enum::_names(), dhandy::bt::index_range<0, Enum::_size()>());
} }
} //namespace tawashi } //namespace tawashi