X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/74032daeb88c104c67738774827440f4264b371e..623bacefa16295fa34407543514013abae7c01d9:/lib/crc32.c

diff --git a/lib/crc32.c b/lib/crc32.c
index fd7bd49..a5512f6 100644
--- a/lib/crc32.c
+++ b/lib/crc32.c
@@ -3,17 +3,17 @@
 /* code from http://www.faqs.org/faqs/compression-faq/part1/section-26.html,
  * presumed public domain */
 
-uint32_t crc32_table[256];
+static uint32_t crc32_table[256];
 
-uint32_t crc32(uint8_t *buf, int len)
+uint32_t crc32(uint8_t *buf, int len, uint32_t crc0)
 {
 	uint8_t *p;
 	uint32_t crc;
 
-	crc = 0xffffffff;       /* preload shift register, per CRC-32 spec */
+	crc = crc0;
 	for (p = buf; len > 0; ++p, --len)
 		crc = (crc << 8) ^ crc32_table[(crc >> 24) ^ *p];
-	return ~crc;	    /* transmit complement, per CRC-32 spec */
+	return crc;
 }
 
 /*