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Diffstat (limited to 'fs/jffs2/compr_rubin.c')
| -rw-r--r-- | fs/jffs2/compr_rubin.c | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/fs/jffs2/compr_rubin.c b/fs/jffs2/compr_rubin.c deleted file mode 100644 index 74577d9c62..0000000000 --- a/fs/jffs2/compr_rubin.c +++ /dev/null @@ -1,126 +0,0 @@ -/* - * JFFS2 -- Journalling Flash File System, Version 2. - * - * Copyright (C) 2001 Red Hat, Inc. - * - * Created by Arjan van de Ven <arjanv@redhat.com> - * - * Heavily modified by Russ Dill <Russ.Dill@asu.edu> in an attempt at - * a little more speed. - * - * The original JFFS, from which the design for JFFS2 was derived, - * was designed and implemented by Axis Communications AB. - * - * The contents of this file are subject to the Red Hat eCos Public - * License Version 1.1 (the "Licence"); you may not use this file - * except in compliance with the Licence. You may obtain a copy of - * the Licence at http://www.redhat.com/ - * - * Software distributed under the Licence is distributed on an "AS IS" - * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. - * See the Licence for the specific language governing rights and - * limitations under the Licence. - * - * The Original Code is JFFS2 - Journalling Flash File System, version 2 - * - * Alternatively, the contents of this file may be used under the - * terms of the GNU General Public License version 2 (the "GPL"), in - * which case the provisions of the GPL are applicable instead of the - * above. If you wish to allow the use of your version of this file - * only under the terms of the GPL and not to allow others to use your - * version of this file under the RHEPL, indicate your decision by - * deleting the provisions above and replace them with the notice and - * other provisions required by the GPL. If you do not delete the - * provisions above, a recipient may use your version of this file - * under either the RHEPL or the GPL. - * - * $Id: compr_rubin.c,v 1.2 2002/01/24 22:58:42 rfeany Exp $ - * - */ - -#include <config.h> -#if (CONFIG_COMMANDS & CFG_CMD_JFFS2) - -#include <jffs2/jffs2.h> -#include <jffs2/compr_rubin.h> - - -void rubin_do_decompress(unsigned char *bits, unsigned char *in, - unsigned char *page_out, __u32 destlen) -{ - register char *curr = (char *)page_out; - char *end = (char *)(page_out + destlen); - register unsigned long temp; - register unsigned long result; - register unsigned long p; - register unsigned long q; - register unsigned long rec_q; - register unsigned long bit; - register long i0; - unsigned long i; - - /* init_pushpull */ - temp = *(u32 *) in; - bit = 16; - - /* init_rubin */ - q = 0; - p = (long) (2 * UPPER_BIT_RUBIN); - - /* init_decode */ - rec_q = (in[0] << 8) | in[1]; - - while (curr < end) { - /* in byte */ - - result = 0; - for (i = 0; i < 8; i++) { - /* decode */ - - while ((q & UPPER_BIT_RUBIN) || ((p + q) <= UPPER_BIT_RUBIN)) { - q &= ~UPPER_BIT_RUBIN; - q <<= 1; - p <<= 1; - rec_q &= ~UPPER_BIT_RUBIN; - rec_q <<= 1; - rec_q |= (temp >> (bit++ ^ 7)) & 1; - if (bit > 31) { - u32 *p = (u32 *)in; - bit = 0; - temp = *(++p); - in = (unsigned char *)p; - } - } - i0 = (bits[i] * p) >> 8; - - if (i0 <= 0) i0 = 1; - /* if it fails, it fails, we have our crc - if (i0 >= p) i0 = p - 1; */ - - result >>= 1; - if (rec_q < q + i0) { - /* result |= 0x00; */ - p = i0; - } else { - result |= 0x80; - p -= i0; - q += i0; - } - } - *(curr++) = result; - } -} - -void dynrubin_decompress(unsigned char *data_in, unsigned char *cpage_out, - unsigned long sourcelen, unsigned long dstlen) -{ - unsigned char bits[8]; - int c; - - for (c=0; c<8; c++) - bits[c] = (256 - data_in[c]); - - rubin_do_decompress(bits, data_in+8, cpage_out, dstlen); -} - -#endif /* CFG_CMD_JFFS2 */ |