Magisk/native/jni/utils/logging.cpp

#include <cstdio>
#include <cstdlib>

#include <logging.hpp>
#include <flags.hpp>

using namespace std;

int nop_log(const char *, va_list) { return 0; }

void nop_ex(int) {}

log_callback log_cb = {
	.d = nop_log,
	.i = nop_log,
	.w = nop_log,
	.e = nop_log,
	.ex = nop_ex
};

void no_logging() {
	log_cb.d = nop_log;
	log_cb.i = nop_log;
	log_cb.w = nop_log;
	log_cb.e = nop_log;
	log_cb.ex = nop_ex;
}

static int vprintfe(const char *fmt, va_list ap) {
	return vfprintf(stderr, fmt, ap);
}

void cmdline_logging() {
	log_cb.d = vprintfe;
	log_cb.i = vprintf;
	log_cb.w = vprintfe;
	log_cb.e = vprintfe;
	log_cb.ex = exit;
}

template <int type>
void log_handler(const char *fmt, ...) {
	va_list argv;
	va_start(argv, fmt);
	if constexpr (type == L_DEBUG) {
		log_cb.d(fmt, argv);
	} else if constexpr (type == L_INFO) {
		log_cb.i(fmt, argv);
	} else if constexpr (type == L_WARN) {
		log_cb.w(fmt, argv);
	} else if constexpr (type == L_ERR) {
		log_cb.e(fmt, argv);
		log_cb.ex(1);
	}
	va_end(argv);
}

template void log_handler<L_INFO>(const char *fmt, ...);
template void log_handler<L_WARN>(const char *fmt, ...);
template void log_handler<L_ERR>(const char *fmt, ...);

#ifdef MAGISK_DEBUG
template void log_handler<L_DEBUG>(const char *fmt, ...);
#else
// Strip debug logging for release builds
template <> void log_handler<L_DEBUG>(const char *fmt, ...) {}
#endif