new file mode 100644
--- /dev/null
+++ b/packages/fs/jffs2/current/src/compr.c
@@ -0,0 +1,139 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 2001, 2002 Red Hat, Inc.
+ *
+ * Created by Arjan van de Ven <arjanv@redhat.com>
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ * $Id: compr.c,v 1.23 2002/01/25 01:49:26 dwmw2 Exp $
+ *
+ */
+
+#ifdef __KERNEL__
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/jffs2.h>
+#elif defined(__ECOS)
+#include "jffs2.h"
+#else /* Userland */
+#define KERN_DEBUG
+#define KERN_NOTICE
+#define KERN_WARNING
+#define printk printf
+#include <stdio.h>
+#include <stdint.h>
+#include <errno.h>
+#include <linux/jffs2.h>
+#endif
+
+int jffs2_zlib_compress(unsigned char *data_in, unsigned char *cpage_out, uint32_t *sourcelen, uint32_t *dstlen);
+void jffs2_zlib_decompress(unsigned char *data_in, unsigned char *cpage_out, uint32_t srclen, uint32_t destlen);
+int jffs2_rtime_compress(unsigned char *data_in, unsigned char *cpage_out, uint32_t *sourcelen, uint32_t *dstlen);
+void jffs2_rtime_decompress(unsigned char *data_in, unsigned char *cpage_out, uint32_t srclen, uint32_t destlen);
+int jffs2_rubinmips_compress(unsigned char *data_in, unsigned char *cpage_out, uint32_t *sourcelen, uint32_t *dstlen);
+void jffs2_rubinmips_decompress(unsigned char *data_in, unsigned char *cpage_out, uint32_t srclen, uint32_t destlen);
+int jffs2_dynrubin_compress(unsigned char *data_in, unsigned char *cpage_out, uint32_t *sourcelen, uint32_t *dstlen);
+void jffs2_dynrubin_decompress(unsigned char *data_in, unsigned char *cpage_out, uint32_t srclen, uint32_t destlen);
+
+
+/* jffs2_compress:
+ * @data: Pointer to uncompressed data
+ * @cdata: Pointer to buffer for compressed data
+ * @datalen: On entry, holds the amount of data available for compression.
+ *	On exit, expected to hold the amount of data actually compressed.
+ * @cdatalen: On entry, holds the amount of space available for compressed
+ *	data. On exit, expected to hold the actual size of the compressed
+ *	data.
+ *
+ * Returns: Byte to be stored with data indicating compression type used.
+ * Zero is used to show that the data could not be compressed - the 
+ * compressed version was actually larger than the original.
+ *
+ * If the cdata buffer isn't large enough to hold all the uncompressed data,
+ * jffs2_compress should compress as much as will fit, and should set 
+ * *datalen accordingly to show the amount of data which were compressed.
+ */
+unsigned char jffs2_compress(unsigned char *data_in, unsigned char *cpage_out, 
+		    uint32_t *datalen, uint32_t *cdatalen)
+{
+	int ret;
+
+	ret = jffs2_zlib_compress(data_in, cpage_out, datalen, cdatalen);
+	if (!ret) {
+		return JFFS2_COMPR_ZLIB;
+	}
+#if 0 /* Disabled 23/9/1. With zlib it hardly ever gets a look in */
+	ret = jffs2_dynrubin_compress(data_in, cpage_out, datalen, cdatalen);
+	if (!ret) {
+		return JFFS2_COMPR_DYNRUBIN;
+	}
+#endif
+#if 0 /* Disabled 26/2/1. Obsoleted by dynrubin */
+	ret = jffs2_rubinmips_compress(data_in, cpage_out, datalen, cdatalen);
+	if (!ret) {
+		return JFFS2_COMPR_RUBINMIPS;
+	}
+#endif
+	/* rtime does manage to recompress already-compressed data */
+	ret = jffs2_rtime_compress(data_in, cpage_out, datalen, cdatalen);
+	if (!ret) {
+		return JFFS2_COMPR_RTIME;
+	}
+#if 0
+	/* We don't need to copy. Let the caller special-case the COMPR_NONE case. */
+	/* If we get here, no compression is going to work */
+	/* But we might want to use the fragmentation part -- Arjan */
+	memcpy(cpage_out,data_in,min(*datalen,*cdatalen));
+	if (*datalen > *cdatalen)
+		*datalen = *cdatalen;
+#endif		
+	return JFFS2_COMPR_NONE; /* We failed to compress */
+
+}
+
+
+int jffs2_decompress(unsigned char comprtype, unsigned char *cdata_in, 
+		     unsigned char *data_out, uint32_t cdatalen, uint32_t datalen)
+{
+	switch (comprtype) {
+	case JFFS2_COMPR_NONE:
+		/* This should be special-cased elsewhere, but we might as well deal with it */
+		memcpy(data_out, cdata_in, datalen);
+		break;
+
+	case JFFS2_COMPR_ZERO:
+		memset(data_out, 0, datalen);
+		break;
+
+	case JFFS2_COMPR_ZLIB:
+		jffs2_zlib_decompress(cdata_in, data_out, cdatalen, datalen);
+		break;
+
+	case JFFS2_COMPR_RTIME:
+		jffs2_rtime_decompress(cdata_in, data_out, cdatalen, datalen);
+		break;
+
+	case JFFS2_COMPR_RUBINMIPS:
+#if 0 /* Disabled 23/9/1 */
+		jffs2_rubinmips_decompress(cdata_in, data_out, cdatalen, datalen);
+#else
+		printk(KERN_WARNING "JFFS2: Rubinmips compression encountered but support not compiled in!\n");
+#endif
+		break;
+	case JFFS2_COMPR_DYNRUBIN:
+#if 1 /* Phase this one out */
+		jffs2_dynrubin_decompress(cdata_in, data_out, cdatalen, datalen);
+#else
+		printk(KERN_WARNING "JFFS2: Dynrubin compression encountered but support not compiled in!\n");
+#endif
+		break;
+
+	default:
+		printk(KERN_NOTICE "Unknown JFFS2 compression type 0x%02x\n", comprtype);
+		return -EIO;
+	}
+	return 0;
+}