From 20d28e80a5c861a9d5f449ea911ab75b4f37ad0d Mon Sep 17 00:00:00 2001
From: Jef <jef@targetspot.com>
Date: Tue, 24 Sep 2024 14:54:57 +0200
Subject: Initial community commit

---
 .../libdiscid-0.6.2/src/unix.c                     | 151 +++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 Src/external_dependencies/libdiscid-0.6.2/src/unix.c

(limited to 'Src/external_dependencies/libdiscid-0.6.2/src/unix.c')

diff --git a/Src/external_dependencies/libdiscid-0.6.2/src/unix.c b/Src/external_dependencies/libdiscid-0.6.2/src/unix.c
new file mode 100644
index 00000000..a91c8e58
--- /dev/null
+++ b/Src/external_dependencies/libdiscid-0.6.2/src/unix.c
@@ -0,0 +1,151 @@
+/* --------------------------------------------------------------------------
+
+   MusicBrainz -- The Internet music metadatabase
+
+   Copyright (C) 2006 Matthias Friedrich
+   Copyright (C) 2000 Robert Kaye
+   Copyright (C) 1999 Marc E E van Woerkom
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+--------------------------------------------------------------------------- */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <assert.h>
+#include <errno.h>
+
+#include "discid/discid_private.h"
+#include "unix.h"
+
+
+int mb_disc_unix_exists(const char *device) {
+	int fd;
+	fd = open(device, O_RDONLY | O_NONBLOCK);
+	if (fd < 0) {
+		/* we only check for existance, access should fail later on */
+		if (errno == ENOENT) {
+			return 0;
+		} else {
+			return 1;
+		}
+	} else {
+		close(fd);
+		return 1;
+	}
+}
+
+char *mb_disc_unix_find_device(char *candidates[], int num_candidates) {
+	int i;
+
+	for (i = 0; i < num_candidates; i++) {
+		if (mb_disc_unix_exists(candidates[i])) {
+			return candidates[i];
+		}
+	}
+	/* use the first name for the error message later on */
+	return candidates[0];
+}
+
+int mb_disc_unix_open(mb_disc_private *disc, const char *device) {
+	int fd;
+
+	fd = open(device, O_RDONLY | O_NONBLOCK);
+	if (fd < 0) {
+		snprintf(disc->error_msg, MB_ERROR_MSG_LENGTH,
+			 "cannot open device `%s'", device);
+	}
+	/* fd < 0 check needs to be made by caller */
+	return fd;
+}
+
+int mb_disc_unix_read_toc(int fd, mb_disc_private *disc, mb_disc_toc *toc) {
+	int i;
+
+	/* Find the numbers of the first track (usually 1) and the last track. */
+	if ( !mb_disc_unix_read_toc_header(fd, toc) ) {
+		snprintf(disc->error_msg, MB_ERROR_MSG_LENGTH,
+			"cannot read table of contents");
+		return 0;
+	}
+
+	/* basic error checking */
+	if ( toc->last_track_num == 0 ) {
+		snprintf(disc->error_msg, MB_ERROR_MSG_LENGTH,
+			"this disc has no tracks");
+		return 0;
+	}
+
+	/*
+	 * Read the TOC entry for every track.
+	 */
+	for (i = toc->first_track_num; i <= toc->last_track_num; i++) {
+		if ( !mb_disc_unix_read_toc_entry(fd, i, &toc->tracks[i]) ) {
+			snprintf(disc->error_msg, MB_ERROR_MSG_LENGTH,
+				 "cannot read TOC entry for track %d", i);
+			return 0;
+		}
+	}
+	if ( !mb_disc_unix_read_toc_entry(fd, 0xAA, &toc->tracks[0]) ) {
+		snprintf(disc->error_msg, MB_ERROR_MSG_LENGTH,
+			 "cannot read TOC entry for lead-out");
+		return 0;
+	}
+
+	return 1;
+}
+
+int mb_disc_unix_read(mb_disc_private *disc, const char *device,
+		      unsigned int features) {
+	mb_disc_toc toc;
+	int fd;
+	int i;
+
+	fd = mb_disc_unix_open(disc, device);
+	if (fd < 0)
+		return 0;
+
+
+	if ( !mb_disc_unix_read_toc(fd, disc, &toc) ) {
+		close(fd);
+		return 0;
+	}
+
+	if ( !mb_disc_load_toc(disc, &toc) ) {
+		close(fd);
+		return 0;
+	}
+
+	/* Read in the media catalog number */
+	if (features & DISCID_FEATURE_MCN
+		&& mb_disc_has_feature_unportable(DISCID_FEATURE_MCN)) {
+		mb_disc_unix_read_mcn(fd, disc);
+	}
+
+	/* Read the ISRC for the track */
+	if (features & DISCID_FEATURE_ISRC
+		&& mb_disc_has_feature_unportable(DISCID_FEATURE_ISRC)) {
+		for (i = disc->first_track_num; i <= disc->last_track_num; i++) {
+			mb_disc_unix_read_isrc(fd, disc, i);
+		}
+	}
+
+	close(fd);
+
+	return 1;
+}
+/* EOF */
-- 
cgit