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Make struct Uppercase have constexpr methods

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This commit is contained in:
Rangi42
2025-08-05 12:11:23 -04:00
parent 70d129fcd7
commit 7020cf7188
2 changed files with 16 additions and 20 deletions
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18
include/util.hpp
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@@ -3,6 +3,9 @@
#ifndef RGBDS_UTIL_HPP
#define RGBDS_UTIL_HPP
#include <algorithm>
#include <ctype.h>
#include <numeric>
#include <stddef.h>
#include <string>
#include <unordered_map>
@@ -15,8 +18,19 @@ bool continuesIdentifier(int c);
char const *printChar(int c);
struct Uppercase {
size_t operator()(std::string const &str) const;
bool operator()(std::string const &str1, std::string const &str2) const;
// FNV-1a hash of an uppercased string
constexpr size_t operator()(std::string const &str) const {
return std::accumulate(RANGE(str), 0x811C9DC5, [](size_t hash, char c) {
return (hash ^ toupper(c)) * 16777619;
});
}
// Compare two strings without case-sensitivity (by converting to uppercase)
constexpr bool operator()(std::string const &str1, std::string const &str2) const {
return std::equal(RANGE(str1), RANGE(str2), [](char c1, char c2) {
return toupper(c1) == toupper(c2);
});
}
};
template<typename T>