Add -N, -I, -L, and -P options to cksum.

3 files changed, 6 insertions, 5 deletions

diff --git a/lib/bunzip.c b/lib/bunzip.c
index 18984af4..f860aa64 100644
--- a/lib/bunzip.c
+++ b/lib/bunzip.c
@@ -609,7 +609,7 @@ int start_bunzip(struct bunzip_data **bdp, int src_fd, char *inbuf, int len)
 		bd->in_fd = src_fd;
 	}
 
-	crc_init(bd->crc32Table);
+	crc_init(bd->crc32Table, 0);
 
 	// Ensure that file starts with "BZh".
     for (i=0;i<3;i++)
diff --git a/lib/lib.c b/lib/lib.c
index f94d6fdf..89c8781b 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -721,15 +721,16 @@ void replace_tempfile(int fdin, int fdout, char **tempname)
 
 // Create a 256 entry CRC32 lookup table.
 
-void crc_init(unsigned int *crc_table)
+void crc_init(unsigned int *crc_table, int little_endian)
 {
 	unsigned int i;
 
 	// Init the CRC32 table (big endian)
 	for (i=0; i<256; i++) {
-		unsigned int j, c = i<<24;
+		unsigned int j, c = little_endian ? i : i<<24;
 		for (j=8; j; j--)
-			c=c&0x80000000 ? (c<<1)^0x04c11db7 : (c<<1);
+			if (little_endian) c = (c&1) ? (c>>1)^0xEDB88320 : c>>1;
+			else c=c&0x80000000 ? (c<<1)^0x04c11db7 : (c<<1);
 		crc_table[i] = c;
 	}
 }
diff --git a/lib/lib.h b/lib/lib.h
index 2fcdaa4d..a473b546 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -96,7 +96,7 @@ void xsendfile(int in, int out);
 int copy_tempfile(int fdin, char *name, char **tempname);
 void delete_tempfile(int fdin, int fdout, char **tempname);
 void replace_tempfile(int fdin, int fdout, char **tempname);
-void crc_init(unsigned int *crc_table);
+void crc_init(unsigned int *crc_table, int little_endian);
 
 // getmountlist.c
 struct mtab_list {