Function dupString

src/e9patch/e9json.cpp:153–165

* Duplicate a string. */

 * Duplicate a string.
 */
static const char *dupString(const char *str)
{
    static std::set<const char *, CStrCmp> cache;
    auto i = cache.find(str);
    if (i != cache.end())
        return *i;

    char *new_str = strdup(str);
    if (new_str == nullptr)
        error("failed to duplicate string \"%s\": %s", str, strerror(ENOMEM));
    cache.insert(new_str);
    return new_str;
}

/*
 * Duplicate bytes.