metaforce/Runtime/CStringExtras.hpp

42 lines
1.6 KiB
C++

#pragma once
#include <algorithm>
#include <cctype>
#include <string>
namespace metaforce {
class CStringExtras {
public:
// Checks if the provided views into string data can be considered equal or not based on
// whether or not all their characters are equal to one another in a character insensitive manner.
//
// NOTE: This differs slightly from the actual version of this function within the game executable
// in order to better accomodate string views and potentially non-null-terminated string data.
//
// In the game executable, the function essentially behaves like strcasecmp in that it returns
// an int indicating whether or not the first argument is less than, equal to,
// or greater than the second argument. Given no usages in the code depend on the less than or
// greater than cases, but rather just care about whether or not the strings are equal to one
// another, this is a safe change to make.
//
static bool CompareCaseInsensitive(std::string_view a, std::string_view b) {
return std::equal(a.begin(), a.end(), b.begin(), b.end(), [](char lhs, char rhs) {
return std::tolower(lhs) == std::tolower(rhs);
});
}
static int IndexOfSubstring(std::string_view haystack, std::string_view needle) {
std::string str(haystack);
std::transform(str.begin(), str.end(), str.begin(),
[](char c) { return std::tolower(static_cast<unsigned char>(c)); });
const std::string::size_type s = str.find(needle);
if (s == std::string::npos) {
return -1;
}
return s;
}
};
} // namespace metaforce