X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=fs%2Fjffs2%2Fcompr_rubin.c;h=c73fa89b5f8a66507e59a30a0d3539673515dc8c;hb=c1dfda399ace020126547e7d454ba94edc8c8797;hp=e792e675d624eecb5fcabfd4dc33cebf7c527bfa;hpb=6b995751c2e851d2bc9c277b5884d0adb519e31d;p=linux-2.6-omap-h63xx.git

diff --git a/fs/jffs2/compr_rubin.c b/fs/jffs2/compr_rubin.c
index e792e675d62..c73fa89b5f8 100644
--- a/fs/jffs2/compr_rubin.c
+++ b/fs/jffs2/compr_rubin.c
@@ -1,23 +1,94 @@
 /*
  * JFFS2 -- Journalling Flash File System, Version 2.
  *
- * Copyright (C) 2001, 2002 Red Hat, Inc.
+ * Copyright © 2001-2007 Red Hat, Inc.
  *
  * Created by Arjan van de Ven <arjanv@redhat.com>
  *
  * For licensing information, see the file 'LICENCE' in this directory.
  *
- * $Id: compr_rubin.c,v 1.20 2004/06/23 16:34:40 havasi Exp $
- *
  */
 
 #include <linux/string.h>
 #include <linux/types.h>
 #include <linux/jffs2.h>
-#include "compr_rubin.h"
-#include "histo_mips.h"
+#include <linux/errno.h>
 #include "compr.h"
 
+
+#define RUBIN_REG_SIZE   16
+#define UPPER_BIT_RUBIN    (((long) 1)<<(RUBIN_REG_SIZE-1))
+#define LOWER_BITS_RUBIN   ((((long) 1)<<(RUBIN_REG_SIZE-1))-1)
+
+
+#define BIT_DIVIDER_MIPS 1043
+static int bits_mips[8] = { 277,249,290,267,229,341,212,241}; /* mips32 */
+
+#include <linux/errno.h>
+
+struct pushpull {
+	unsigned char *buf;
+	unsigned int buflen;
+	unsigned int ofs;
+	unsigned int reserve;
+};
+
+struct rubin_state {
+	unsigned long p;
+	unsigned long q;
+	unsigned long rec_q;
+	long bit_number;
+	struct pushpull pp;
+	int bit_divider;
+	int bits[8];
+};
+
+static inline void init_pushpull(struct pushpull *pp, char *buf, unsigned buflen, unsigned ofs, unsigned reserve)
+{
+	pp->buf = buf;
+	pp->buflen = buflen;
+	pp->ofs = ofs;
+	pp->reserve = reserve;
+}
+
+static inline int pushbit(struct pushpull *pp, int bit, int use_reserved)
+{
+	if (pp->ofs >= pp->buflen - (use_reserved?0:pp->reserve)) {
+		return -ENOSPC;
+	}
+
+	if (bit) {
+		pp->buf[pp->ofs >> 3] |= (1<<(7-(pp->ofs &7)));
+	}
+	else {
+		pp->buf[pp->ofs >> 3] &= ~(1<<(7-(pp->ofs &7)));
+	}
+	pp->ofs++;
+
+	return 0;
+}
+
+static inline int pushedbits(struct pushpull *pp)
+{
+	return pp->ofs;
+}
+
+static inline int pullbit(struct pushpull *pp)
+{
+	int bit;
+
+	bit = (pp->buf[pp->ofs >> 3] >> (7-(pp->ofs & 7))) & 1;
+
+	pp->ofs++;
+	return bit;
+}
+
+static inline int pulledbits(struct pushpull *pp)
+{
+	return pp->ofs;
+}
+
+
 static void init_rubin(struct rubin_state *rs, int div, int *bits)
 {
 	int c;
@@ -313,7 +384,7 @@ static int jffs2_rubinmips_decompress(unsigned char *data_in,
 				      void *model)
 {
 	rubin_do_decompress(BIT_DIVIDER_MIPS, bits_mips, data_in, cpage_out, sourcelen, dstlen);
-        return 0;
+	return 0;
 }
 
 static int jffs2_dynrubin_decompress(unsigned char *data_in,
@@ -328,7 +399,7 @@ static int jffs2_dynrubin_decompress(unsigned char *data_in,
 		bits[c] = data_in[c];
 
 	rubin_do_decompress(256, bits, data_in+8, cpage_out, sourcelen-8, dstlen);
-        return 0;
+	return 0;
 }
 
 static struct jffs2_compressor jffs2_rubinmips_comp = {