/*
 * Live variable collector
 * Copyright (C) 2021, 2023  Gregory James Duck
 * Copyright (C) 2024  Nguyễn Gia Phong
 *
 * This file is part of taosc.
 *
 * Taosc is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Taosc is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with taosc.  If not, see <https://www.gnu.org/licenses/>.
 */

#include "stdlib.c"

FILE *fout = NULL;

void init(int argc, const char *const *argv, const char **envp)
{
	environ = envp;
	const char *const path = getenv("TAOSC_OUTPUT");
	if (path != NULL)
		fout = fopen(path, "w");
	if (fout == NULL)
		fout = stderr;
	setvbuf(fout, NULL, _IOFBF, 0);
}


void log(const struct STATE *state)
{
	static mutex_t mutex = MUTEX_INITIALIZER;
	if (mutex_lock(&mutex) < 0)
		return;
	clearerr(fout);
	fprintf(fout, "[begin]\n");
	const int64_t *const env = (const int64_t *) state;
	for (unsigned char i = 1; i < sizeof(*state) / sizeof(*env); ++i)
		fprintf(fout, "%hhu %lld\n", i, env[i]);
	fprintf(fout, "[end]\n");
	fflush(fout);
	fclose(fout); /* FIXME: reopen */
	mutex_unlock(&mutex);
}