Method format

app/src/main/cpp/utils/log/Log.h:28–52

    static volatile LogHandler mHandler;
public:
    static void format(Level level, const char *tag, const char *fmt, ...)
    __attribute__ ((__format__ (__printf__, 3, 4))) {
        va_list varg1;
        va_list varg2;
        LogHandler h = mHandler;
        if (h == nullptr || fmt == nullptr) {
            return;
        }
        va_start(varg1, fmt);
        va_copy(varg2, varg1);
        int size = vsnprintf(nullptr, 0, fmt, varg1) + 4;
        va_end(varg1);
        if (size <= 0) {
            return;
        }
        void *buffer = malloc(size);
        if (buffer == nullptr) {
            return;
        }
        va_start(varg2, fmt);
        vsnprintf((char *) buffer, size, fmt, varg2);
        va_end(varg2);
        h(level, tag, static_cast<const char *>(buffer));
        free(buffer);
    }

    static void logBuffer(Level level, const char *tag, const char *msg) {
        LogHandler h = mHandler;