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SQUASHFS/squashfs-tools-4.4/squashfs-tools/unsquash-34.c

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+/*
+ * Unsquash a squashfs filesystem.  This is a highly compressed read only
+ * filesystem.
+ *
+ * Copyright (c) 2019
+ * Phillip Lougher <phillip@squashfs.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2,
+ * or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * unsquash-34.c
+ *
+ * Helper functions used by unsquash-3 and unsquash-4.
+ */
+
+#include "unsquashfs.h"
+
+long long *alloc_index_table(int indexes)
+{
+	static long long *alloc_table = NULL;
+	static int alloc_size = 0;
+	int length = indexes * sizeof(long long);
+
+	if(alloc_size < length || length == 0) {
+		long long *table = realloc(alloc_table, length);
+
+		if(table == NULL && length !=0)
+			EXIT_UNSQUASH("alloc_index_table: failed to allocate "
+				"index table\n");
+
+		alloc_table = table;
+		alloc_size = length;
+	}
+
+	return alloc_table;
+}