From: Michael Gernoth <michael@gernoth.net>
Date: Tue, 27 Jan 2009 23:54:58 +0000 (+0100)
Subject: make crc implementation a bit more readable
X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/rsbs2/commitdiff_plain/c8b1eccb76b5f4141da32b74c68468eaa87c7972

make crc implementation a bit more readable
---

diff --git a/rsb-crc.c b/rsb-crc.c
index 84b7fa2..fa40c49 100644
--- a/rsb-crc.c
+++ b/rsb-crc.c
@@ -34,31 +34,31 @@
  * 4c4: DATA: 0x04c11db7
  */
 
-unsigned int rsb_crc(unsigned int r11, unsigned char *r10, unsigned int r14) {
-	unsigned int r6 = 0;
-	unsigned int r3;
-	int r5;
+unsigned int rsb_crc(unsigned int r11_crc, unsigned char *r10_buf, unsigned int r14_len) {
+	unsigned int r6_pos = 0;
+	unsigned int r3_data;
+	int r5_bit;
 
-	while (r6 < r14) {
-		r3 = (*(r6+r10)) << 24;
-		r11 = r11 ^ r3;
+	while (r6_pos < r14_len) {
+		r3_data = (*(r6_pos+r10_buf)) << 24;
+		r11_crc = r11_crc ^ r3_data;
 
-		r5 = 8;
+		r5_bit = 8;
 		
 		do {
-			r3 = r11 & 0x80000000;
+			r3_data = r11_crc & 0x80000000;
 
-			if (r3 != 0) {
-				r3 = r11 << 1;
-				r11 = r3 ^ POLY;
+			if (r3_data != 0) {
+				r3_data = r11_crc << 1;
+				r11_crc = r3_data ^ POLY;
 			} else {
-				r11 = r11 << 1;
+				r11_crc = r11_crc << 1;
 			}
-			r5--;
-		} while (r5);
+			r5_bit--;
+		} while (r5_bit);
 
-		r6++;
+		r6_pos++;
 	}
 
-	return r11;
+	return r11_crc;
 }