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

1 files changed, 4 insertions, 3 deletions

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;
 	}
 }