#include "common.h"
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>

#include "e2e.h"
#include "export.h"

int main(int argc, char **argv)
{
	int ret = 0;
	char *inpath, outpath[4096];
	int fd;
	struct stat st;
	void *input;
	struct e2e_data data;

	if (argc < 2) {
		fprintf(stderr, "%s [INPUT] (OUTPUT)\n", argv[0]);
		return 1;
	}

	inpath = argv[1];

	fd = open(inpath, O_RDONLY);
	if (fd == -1) {
		perror("open");
		return 1;
	}

	if (fstat(fd, &st) == -1) {
		perror("fstat");
		ret = 1;
		goto error_mmap;
	}

	input = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
	if (!input) {
		perror("mmap");
		ret = 1;
		goto error_mmap;
	}

	if (errno = e2e_read(&data, input, input + st.st_size))
		perror("e2e_read");
	else {
		// FIXME: ...
		if (argc >= 3)
			strcpy(outpath, argv[2]);
		else {
			int len = strlen(inpath);

			if (len >= 3 && (!strcmp(inpath + len - 4, ".e2e")
			    || !strcmp(inpath + len - 4, ".E2E")))
				sprintf(outpath, "%.*s.mat", len - 4, inpath);
			else
				sprintf(outpath, "%s.mat", inpath);
		}

		if (errno = export(&data, outpath))
			perror("export");
	}

	e2e_destroy(&data);

	munmap(input, st.st_size);
error_mmap:
	close(fd);
	return ret;
}