Function parsenrg

src/blkdev_cdimage.cpp:2072–2244

}

static int parsenrg(struct cdunit *cdu, struct zfile *znrg, const TCHAR *img, const TCHAR *curdir, const TCHAR *ocurdir)
{
	uae_s64 size;
	uae_s64 offset;
	bool ner5 = false;
	uae_u8 buf[256] = { 0 };
	int tracknum = 0;
	uae_u32 lastlba = 0;
	bool gotsession = false;

	if (curdir)
		my_setcurrentdir(ocurdir, NULL);

	size = zfile_size(znrg);
	zfile_fseek(znrg, size - 12, SEEK_SET);
	zfile_fread(buf, 12, 1, znrg);
	if (!memcmp(buf, "NER5", 4)) {
		offset = get_quad_host(buf + 4);
		ner5 = true;
	} else if (!memcmp(buf + 4, "NERO", 4)) {
		offset = get_long_host(buf + 8);
	} else {
		return 0;
	}
	if (offset < 0 || offset >= size - 12)
		return 0;
	zfile_fseek(znrg, offset, SEEK_SET);
	for (;;) {
		memset(buf, 0, 8);
		if (zfile_fread(buf, 8, 1, znrg) != 1)
			return 0;
		offset = zfile_ftell(znrg);
		uae_s32 size = get_long_host(buf + 4);
		buf[4] = 0;
		offset += size;
		if (!gotsession && !memcmp(buf, "ETN2", 4)) {
			tracknum = 1;
			int blocksize = 32;
			while (size >= blocksize) {
				uae_s64 toffset;
				uae_u32 lba;
				uae_u32 type;
				cdtoc *t = &cdu->toc[tracknum - 1];
				if (zfile_fread(buf, blocksize, 1, znrg) != 1)
					return 0;
				toffset = get_quad_host(buf);
				lba = get_long_host(buf + 20);
				type = get_long_host(buf + 16);
				t->offset = toffset;
				t->address = lba;
				if (type == 7) {
					t->size = 2352;
					t->enctype = AUDENC_PCM;
				} else if (type == 0 || type == 3) {
					t->size = 2048;
					t->ctrl |= 4;
				}
				t->track = tracknum;