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Diffstat (limited to 'archival/libunarchive/lzo1x_c.c')
-rw-r--r--archival/libunarchive/lzo1x_c.c296
1 files changed, 0 insertions, 296 deletions
diff --git a/archival/libunarchive/lzo1x_c.c b/archival/libunarchive/lzo1x_c.c
deleted file mode 100644
index cc86f74..0000000
--- a/archival/libunarchive/lzo1x_c.c
+++ /dev/null
@@ -1,296 +0,0 @@
-/* implementation of the LZO1[XY]-1 compression algorithm
-
- This file is part of the LZO real-time data compression library.
-
- Copyright (C) 1996..2008 Markus Franz Xaver Johannes Oberhumer
- All Rights Reserved.
-
- Markus F.X.J. Oberhumer <markus@oberhumer.com>
- http://www.oberhumer.com/opensource/lzo/
-
- The LZO library is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of
- the License, or (at your option) any later version.
-
- The LZO library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with the LZO library; see the file COPYING.
- If not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-/***********************************************************************
-// compress a block of data.
-************************************************************************/
-static NOINLINE unsigned
-do_compress(const uint8_t* in, unsigned in_len,
- uint8_t* out, unsigned* out_len,
- void* wrkmem)
-{
- register const uint8_t* ip;
- uint8_t* op;
- const uint8_t* const in_end = in + in_len;
- const uint8_t* const ip_end = in + in_len - M2_MAX_LEN - 5;
- const uint8_t* ii;
- const void* *const dict = (const void**) wrkmem;
-
- op = out;
- ip = in;
- ii = ip;
-
- ip += 4;
- for (;;) {
- register const uint8_t* m_pos;
- unsigned m_off;
- unsigned m_len;
- unsigned dindex;
-
- D_INDEX1(dindex,ip);
- GINDEX(m_pos,m_off,dict,dindex,in);
- if (LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,M4_MAX_OFFSET))
- goto literal;
-#if 1
- if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
- goto try_match;
- D_INDEX2(dindex,ip);
-#endif
- GINDEX(m_pos,m_off,dict,dindex,in);
- if (LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,M4_MAX_OFFSET))
- goto literal;
- if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
- goto try_match;
- goto literal;
-
- try_match:
-#if 1 && defined(LZO_UNALIGNED_OK_2)
- if (* (const lzo_ushortp) m_pos != * (const lzo_ushortp) ip)
-#else
- if (m_pos[0] != ip[0] || m_pos[1] != ip[1])
-#endif
- {
- } else {
- if (m_pos[2] == ip[2]) {
-#if 0
- if (m_off <= M2_MAX_OFFSET)
- goto match;
- if (lit <= 3)
- goto match;
- if (lit == 3) { /* better compression, but slower */
- assert(op - 2 > out); op[-2] |= (uint8_t)(3);
- *op++ = *ii++; *op++ = *ii++; *op++ = *ii++;
- goto code_match;
- }
- if (m_pos[3] == ip[3])
-#endif
- goto match;
- }
- else {
- /* still need a better way for finding M1 matches */
-#if 0
- /* a M1 match */
-#if 0
- if (m_off <= M1_MAX_OFFSET && lit > 0 && lit <= 3)
-#else
- if (m_off <= M1_MAX_OFFSET && lit == 3)
-#endif
- {
- register unsigned t;
-
- t = lit;
- assert(op - 2 > out); op[-2] |= (uint8_t)(t);
- do *op++ = *ii++; while (--t > 0);
- assert(ii == ip);
- m_off -= 1;
- *op++ = (uint8_t)(M1_MARKER | ((m_off & 3) << 2));
- *op++ = (uint8_t)(m_off >> 2);
- ip += 2;
- goto match_done;
- }
-#endif
- }
- }
-
- /* a literal */
- literal:
- UPDATE_I(dict, 0, dindex, ip, in);
- ++ip;
- if (ip >= ip_end)
- break;
- continue;
-
- /* a match */
-match:
- UPDATE_I(dict, 0, dindex, ip, in);
- /* store current literal run */
- if (pd(ip, ii) > 0) {
- register unsigned t = pd(ip, ii);
-
- if (t <= 3) {
- assert(op - 2 > out);
- op[-2] |= (uint8_t)(t);
- }
- else if (t <= 18)
- *op++ = (uint8_t)(t - 3);
- else {
- register unsigned tt = t - 18;
-
- *op++ = 0;
- while (tt > 255) {
- tt -= 255;
- *op++ = 0;
- }
- assert(tt > 0);
- *op++ = (uint8_t)(tt);
- }
- do *op++ = *ii++; while (--t > 0);
- }
-
- /* code the match */
- assert(ii == ip);
- ip += 3;
- if (m_pos[3] != *ip++ || m_pos[4] != *ip++ || m_pos[5] != *ip++
- || m_pos[6] != *ip++ || m_pos[7] != *ip++ || m_pos[8] != *ip++
-#ifdef LZO1Y
- || m_pos[ 9] != *ip++ || m_pos[10] != *ip++ || m_pos[11] != *ip++
- || m_pos[12] != *ip++ || m_pos[13] != *ip++ || m_pos[14] != *ip++
-#endif
- ) {
- --ip;
- m_len = pd(ip, ii);
- assert(m_len >= 3);
- assert(m_len <= M2_MAX_LEN);
-
- if (m_off <= M2_MAX_OFFSET) {
- m_off -= 1;
-#if defined(LZO1X)
- *op++ = (uint8_t)(((m_len - 1) << 5) | ((m_off & 7) << 2));
- *op++ = (uint8_t)(m_off >> 3);
-#elif defined(LZO1Y)
- *op++ = (uint8_t)(((m_len + 1) << 4) | ((m_off & 3) << 2));
- *op++ = (uint8_t)(m_off >> 2);
-#endif
- }
- else if (m_off <= M3_MAX_OFFSET) {
- m_off -= 1;
- *op++ = (uint8_t)(M3_MARKER | (m_len - 2));
- goto m3_m4_offset;
- } else {
-#if defined(LZO1X)
- m_off -= 0x4000;
- assert(m_off > 0);
- assert(m_off <= 0x7fff);
- *op++ = (uint8_t)(M4_MARKER | ((m_off & 0x4000) >> 11) | (m_len - 2));
- goto m3_m4_offset;
-#elif defined(LZO1Y)
- goto m4_match;
-#endif
- }
- }
- else {
- {
- const uint8_t* end = in_end;
- const uint8_t* m = m_pos + M2_MAX_LEN + 1;
- while (ip < end && *m == *ip)
- m++, ip++;
- m_len = pd(ip, ii);
- }
- assert(m_len > M2_MAX_LEN);
-
- if (m_off <= M3_MAX_OFFSET) {
- m_off -= 1;
- if (m_len <= 33)
- *op++ = (uint8_t)(M3_MARKER | (m_len - 2));
- else {
- m_len -= 33;
- *op++ = M3_MARKER | 0;
- goto m3_m4_len;
- }
- } else {
-#if defined(LZO1Y)
- m4_match:
-#endif
- m_off -= 0x4000;
- assert(m_off > 0);
- assert(m_off <= 0x7fff);
- if (m_len <= M4_MAX_LEN)
- *op++ = (uint8_t)(M4_MARKER | ((m_off & 0x4000) >> 11) | (m_len - 2));
- else {
- m_len -= M4_MAX_LEN;
- *op++ = (uint8_t)(M4_MARKER | ((m_off & 0x4000) >> 11));
- m3_m4_len:
- while (m_len > 255) {
- m_len -= 255;
- *op++ = 0;
- }
- assert(m_len > 0);
- *op++ = (uint8_t)(m_len);
- }
- }
- m3_m4_offset:
- *op++ = (uint8_t)((m_off & 63) << 2);
- *op++ = (uint8_t)(m_off >> 6);
- }
-#if 0
- match_done:
-#endif
- ii = ip;
- if (ip >= ip_end)
- break;
- }
-
- *out_len = pd(op, out);
- return pd(in_end, ii);
-}
-
-/***********************************************************************
-// public entry point
-************************************************************************/
-int DO_COMPRESS(const uint8_t* in, unsigned in_len,
- uint8_t* out, unsigned* out_len,
- void* wrkmem)
-{
- uint8_t* op = out;
- unsigned t;
-
- if (in_len <= M2_MAX_LEN + 5)
- t = in_len;
- else {
- t = do_compress(in,in_len,op,out_len,wrkmem);
- op += *out_len;
- }
-
- if (t > 0) {
- const uint8_t* ii = in + in_len - t;
-
- if (op == out && t <= 238)
- *op++ = (uint8_t)(17 + t);
- else if (t <= 3)
- op[-2] |= (uint8_t)(t);
- else if (t <= 18)
- *op++ = (uint8_t)(t - 3);
- else {
- unsigned tt = t - 18;
-
- *op++ = 0;
- while (tt > 255) {
- tt -= 255;
- *op++ = 0;
- }
- assert(tt > 0);
- *op++ = (uint8_t)(tt);
- }
- do *op++ = *ii++; while (--t > 0);
- }
-
- *op++ = M4_MARKER | 1;
- *op++ = 0;
- *op++ = 0;
-
- *out_len = pd(op, out);
- return 0; /*LZO_E_OK*/
-}
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