constexpr_strequal.hpp

constexpr bool constexpr_strequal(const char * a, const char * b)
{
    // Assume that NULL != NULL
    if (!a || !b) {
        return false;
    }

    // If pointers are equal, values are equal
    if (a == b) {
        return true;
    }

    // Scan through individual characters
    const char * pa = a;
    const char * pb = b;
    while (true) {
        if (*pa != *pb) {
            // A discrepency was detected
            return false;
        }
        if (!(*pa)) {
            // Strings have been terminated
            break;
        }
        // Advance character-pointers
        ++pa;
        ++pb;
    }
    
    // If we get here, the strings' contents should be equal
    return true;
}