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Diffstat (limited to 'contrib/syslinux/syslinux-4.03/lzo/src/lzo1x_9x.c')
| -rw-r--r-- | contrib/syslinux/syslinux-4.03/lzo/src/lzo1x_9x.c | 881 |
1 files changed, 0 insertions, 881 deletions
diff --git a/contrib/syslinux/syslinux-4.03/lzo/src/lzo1x_9x.c b/contrib/syslinux/syslinux-4.03/lzo/src/lzo1x_9x.c deleted file mode 100644 index b108bf8..0000000 --- a/contrib/syslinux/syslinux-4.03/lzo/src/lzo1x_9x.c +++ /dev/null @@ -1,881 +0,0 @@ -/* lzo1x_9x.c -- implementation of the LZO1X-999 compression algorithm - - This file is part of the LZO real-time data compression library. - - Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer - Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer - All Rights Reserved. - - 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. - - Markus F.X.J. Oberhumer - <markus@oberhumer.com> - http://www.oberhumer.com/opensource/lzo/ - */ - - -#if !defined(LZO1X) && !defined(LZO1Y) && !defined(LZO1Z) -# define LZO1X -#endif - -#if defined(LZO1X) -# include "config1x.h" -#elif defined(LZO1Y) -# include "config1y.h" -#elif defined(LZO1Z) -# include "config1z.h" -#else -# error -#endif - - -/*********************************************************************** -// -************************************************************************/ - -#define N M4_MAX_OFFSET /* size of ring buffer */ -#define THRESHOLD 1 /* lower limit for match length */ -#define F 2048 /* upper limit for match length */ - -#define SWD_BEST_OFF (LZO_MAX3( M2_MAX_LEN, M3_MAX_LEN, M4_MAX_LEN ) + 1) - -#if defined(LZO1X) -# define LZO_COMPRESS_T lzo1x_999_t -# define lzo_swd_t lzo1x_999_swd_t -#elif defined(LZO1Y) -# define LZO_COMPRESS_T lzo1y_999_t -# define lzo_swd_t lzo1y_999_swd_t -# define lzo1x_999_compress_internal lzo1y_999_compress_internal -# define lzo1x_999_compress_dict lzo1y_999_compress_dict -# define lzo1x_999_compress_level lzo1y_999_compress_level -# define lzo1x_999_compress lzo1y_999_compress -#elif defined(LZO1Z) -# define LZO_COMPRESS_T lzo1z_999_t -# define lzo_swd_t lzo1z_999_swd_t -# define lzo1x_999_compress_internal lzo1z_999_compress_internal -# define lzo1x_999_compress_dict lzo1z_999_compress_dict -# define lzo1x_999_compress_level lzo1z_999_compress_level -# define lzo1x_999_compress lzo1z_999_compress -#else -# error -#endif - -#if 0 -# define HEAD3(b,p) \ - ((((((lzo_xint)b[p]<<3)^b[p+1])<<3)^b[p+2]) & (SWD_HSIZE-1)) -#endif -#if 0 && defined(LZO_UNALIGNED_OK_4) && defined(LZO_ABI_LITTLE_ENDIAN) -# define HEAD3(b,p) \ - (((* (lzo_uint32p) &b[p]) ^ ((* (lzo_uint32p) &b[p])>>10)) & (SWD_HSIZE-1)) -#endif - -#include "lzo_mchw.ch" - - -/* this is a public functions, but there is no prototype in a header file */ -LZO_EXTERN(int) -lzo1x_999_compress_internal ( const lzo_bytep in , lzo_uint in_len, - lzo_bytep out, lzo_uintp out_len, - lzo_voidp wrkmem, - const lzo_bytep dict, lzo_uint dict_len, - lzo_callback_p cb, - int try_lazy, - lzo_uint good_length, - lzo_uint max_lazy, - lzo_uint nice_length, - lzo_uint max_chain, - lzo_uint32 flags ); - - -/*********************************************************************** -// -************************************************************************/ - -static lzo_bytep -code_match ( LZO_COMPRESS_T *c, lzo_bytep op, lzo_uint m_len, lzo_uint m_off ) -{ - lzo_uint x_len = m_len; - lzo_uint x_off = m_off; - - c->match_bytes += (unsigned long) m_len; - -#if 0 -/* - static lzo_uint last_m_len = 0, last_m_off = 0; - static lzo_uint prev_m_off[4]; - static int prev_m_off_ptr = 0; - int i; - - //if (m_len >= 3 && m_len <= M2_MAX_LEN && m_off <= M2_MAX_OFFSET) - if (m_len >= 3 && m_len <= M2_MAX_LEN) - { - //if (m_len == last_m_len && m_off == last_m_off) - //printf("last_m_len + last_m_off\n"); - //else - if (m_off == last_m_off) - printf("last_m_off\n"); - else - { - for (i = 0; i < 4; i++) - if (m_off == prev_m_off[i]) - printf("prev_m_off %d: %5ld\n",i,(long)m_off); - } - } - last_m_len = m_len; - last_m_off = prev_m_off[prev_m_off_ptr] = m_off; - prev_m_off_ptr = (prev_m_off_ptr + 1) & 3; -*/ -#endif - - assert(op > c->out); - if (m_len == 2) - { - assert(m_off <= M1_MAX_OFFSET); - assert(c->r1_lit > 0); assert(c->r1_lit < 4); - m_off -= 1; -#if defined(LZO1Z) - *op++ = LZO_BYTE(M1_MARKER | (m_off >> 6)); - *op++ = LZO_BYTE(m_off << 2); -#else - *op++ = LZO_BYTE(M1_MARKER | ((m_off & 3) << 2)); - *op++ = LZO_BYTE(m_off >> 2); -#endif - c->m1a_m++; - } -#if defined(LZO1Z) - else if (m_len <= M2_MAX_LEN && (m_off <= M2_MAX_OFFSET || m_off == c->last_m_off)) -#else - else if (m_len <= M2_MAX_LEN && m_off <= M2_MAX_OFFSET) -#endif - { - assert(m_len >= 3); -#if defined(LZO1X) - m_off -= 1; - *op++ = LZO_BYTE(((m_len - 1) << 5) | ((m_off & 7) << 2)); - *op++ = LZO_BYTE(m_off >> 3); - assert(op[-2] >= M2_MARKER); -#elif defined(LZO1Y) - m_off -= 1; - *op++ = LZO_BYTE(((m_len + 1) << 4) | ((m_off & 3) << 2)); - *op++ = LZO_BYTE(m_off >> 2); - assert(op[-2] >= M2_MARKER); -#elif defined(LZO1Z) - if (m_off == c->last_m_off) - *op++ = LZO_BYTE(((m_len - 1) << 5) | (0x700 >> 6)); - else - { - m_off -= 1; - *op++ = LZO_BYTE(((m_len - 1) << 5) | (m_off >> 6)); - *op++ = LZO_BYTE(m_off << 2); - } -#endif - c->m2_m++; - } - else if (m_len == M2_MIN_LEN && m_off <= MX_MAX_OFFSET && c->r1_lit >= 4) - { - assert(m_len == 3); - assert(m_off > M2_MAX_OFFSET); - m_off -= 1 + M2_MAX_OFFSET; -#if defined(LZO1Z) - *op++ = LZO_BYTE(M1_MARKER | (m_off >> 6)); - *op++ = LZO_BYTE(m_off << 2); -#else - *op++ = LZO_BYTE(M1_MARKER | ((m_off & 3) << 2)); - *op++ = LZO_BYTE(m_off >> 2); -#endif - c->m1b_m++; - } - else if (m_off <= M3_MAX_OFFSET) - { - assert(m_len >= 3); - m_off -= 1; - if (m_len <= M3_MAX_LEN) - *op++ = LZO_BYTE(M3_MARKER | (m_len - 2)); - else - { - m_len -= M3_MAX_LEN; - *op++ = M3_MARKER | 0; - while (m_len > 255) - { - m_len -= 255; - *op++ = 0; - } - assert(m_len > 0); - *op++ = LZO_BYTE(m_len); - } -#if defined(LZO1Z) - *op++ = LZO_BYTE(m_off >> 6); - *op++ = LZO_BYTE(m_off << 2); -#else - *op++ = LZO_BYTE(m_off << 2); - *op++ = LZO_BYTE(m_off >> 6); -#endif - c->m3_m++; - } - else - { - lzo_uint k; - - assert(m_len >= 3); - assert(m_off > 0x4000); assert(m_off <= 0xbfff); - m_off -= 0x4000; - k = (m_off & 0x4000) >> 11; - if (m_len <= M4_MAX_LEN) - *op++ = LZO_BYTE(M4_MARKER | k | (m_len - 2)); - else - { - m_len -= M4_MAX_LEN; - *op++ = LZO_BYTE(M4_MARKER | k | 0); - while (m_len > 255) - { - m_len -= 255; - *op++ = 0; - } - assert(m_len > 0); - *op++ = LZO_BYTE(m_len); - } -#if defined(LZO1Z) - *op++ = LZO_BYTE(m_off >> 6); - *op++ = LZO_BYTE(m_off << 2); -#else - *op++ = LZO_BYTE(m_off << 2); - *op++ = LZO_BYTE(m_off >> 6); -#endif - c->m4_m++; - } - - c->last_m_len = x_len; - c->last_m_off = x_off; - return op; -} - - -static lzo_bytep -STORE_RUN ( LZO_COMPRESS_T *c, lzo_bytep op, const lzo_bytep ii, lzo_uint t ) -{ - c->lit_bytes += (unsigned long) t; - - if (op == c->out && t <= 238) - { - *op++ = LZO_BYTE(17 + t); - } - else if (t <= 3) - { -#if defined(LZO1Z) - op[-1] |= LZO_BYTE(t); -#else - op[-2] |= LZO_BYTE(t); -#endif - c->lit1_r++; - } - else if (t <= 18) - { - *op++ = LZO_BYTE(t - 3); - c->lit2_r++; - } - else - { - lzo_uint tt = t - 18; - - *op++ = 0; - while (tt > 255) - { - tt -= 255; - *op++ = 0; - } - assert(tt > 0); - *op++ = LZO_BYTE(tt); - c->lit3_r++; - } - do *op++ = *ii++; while (--t > 0); - - return op; -} - - -static lzo_bytep -code_run ( LZO_COMPRESS_T *c, lzo_bytep op, const lzo_bytep ii, - lzo_uint lit, lzo_uint m_len ) -{ - if (lit > 0) - { - assert(m_len >= 2); - op = STORE_RUN(c,op,ii,lit); - c->r1_m_len = m_len; - c->r1_lit = lit; - } - else - { - assert(m_len >= 3); - c->r1_m_len = 0; - c->r1_lit = 0; - } - - return op; -} - - -/*********************************************************************** -// -************************************************************************/ - -static int -len_of_coded_match ( lzo_uint m_len, lzo_uint m_off, lzo_uint lit ) -{ - int n = 4; - - if (m_len < 2) - return -1; - if (m_len == 2) - return (m_off <= M1_MAX_OFFSET && lit > 0 && lit < 4) ? 2 : -1; - if (m_len <= M2_MAX_LEN && m_off <= M2_MAX_OFFSET) - return 2; - if (m_len == M2_MIN_LEN && m_off <= MX_MAX_OFFSET && lit >= 4) - return 2; - if (m_off <= M3_MAX_OFFSET) - { - if (m_len <= M3_MAX_LEN) - return 3; - m_len -= M3_MAX_LEN; - while (m_len > 255) - { - m_len -= 255; - n++; - } - return n; - } - if (m_off <= M4_MAX_OFFSET) - { - if (m_len <= M4_MAX_LEN) - return 3; - m_len -= M4_MAX_LEN; - while (m_len > 255) - { - m_len -= 255; - n++; - } - return n; - } - return -1; -} - - -static lzo_int -min_gain(lzo_uint ahead, lzo_uint lit1, lzo_uint lit2, int l1, int l2, int l3) -{ - lzo_int lazy_match_min_gain = 0; - - assert (ahead >= 1); - lazy_match_min_gain += ahead; - -#if 0 - if (l3 > 0) - lit2 -= ahead; -#endif - - if (lit1 <= 3) - lazy_match_min_gain += (lit2 <= 3) ? 0 : 2; - else if (lit1 <= 18) - lazy_match_min_gain += (lit2 <= 18) ? 0 : 1; - - lazy_match_min_gain += (l2 - l1) * 2; - if (l3 > 0) - lazy_match_min_gain -= (ahead - l3) * 2; - - if (lazy_match_min_gain < 0) - lazy_match_min_gain = 0; - -#if 0 - if (l1 == 2) - if (lazy_match_min_gain == 0) - lazy_match_min_gain = 1; -#endif - - return lazy_match_min_gain; -} - - -/*********************************************************************** -// -************************************************************************/ - -#if !defined(NDEBUG) -static -void assert_match( const lzo_swd_p swd, lzo_uint m_len, lzo_uint m_off ) -{ - const LZO_COMPRESS_T *c = swd->c; - lzo_uint d_off; - - assert(m_len >= 2); - if (m_off <= (lzo_uint) (c->bp - c->in)) - { - assert(c->bp - m_off + m_len < c->ip); - assert(lzo_memcmp(c->bp, c->bp - m_off, m_len) == 0); - } - else - { - assert(swd->dict != NULL); - d_off = m_off - (lzo_uint) (c->bp - c->in); - assert(d_off <= swd->dict_len); - if (m_len > d_off) - { - assert(lzo_memcmp(c->bp, swd->dict_end - d_off, d_off) == 0); - assert(c->in + m_len - d_off < c->ip); - assert(lzo_memcmp(c->bp + d_off, c->in, m_len - d_off) == 0); - } - else - { - assert(lzo_memcmp(c->bp, swd->dict_end - d_off, m_len) == 0); - } - } -} -#else -# define assert_match(a,b,c) ((void)0) -#endif - - -#if defined(SWD_BEST_OFF) - -static void -better_match ( const lzo_swd_p swd, lzo_uint *m_len, lzo_uint *m_off ) -{ -#if defined(LZO1Z) - const LZO_COMPRESS_T *c = swd->c; -#endif - - if (*m_len <= M2_MIN_LEN) - return; -#if defined(LZO1Z) - if (*m_off == c->last_m_off && *m_len <= M2_MAX_LEN) - return; -#if 1 - if (*m_len >= M2_MIN_LEN + 1 && *m_len <= M2_MAX_LEN + 1 && - c->last_m_off && swd->best_off[*m_len-1] == c->last_m_off) - { - *m_len = *m_len - 1; - *m_off = swd->best_off[*m_len]; - return; - } -#endif -#endif - - if (*m_off <= M2_MAX_OFFSET) - return; - -#if 1 - /* M3/M4 -> M2 */ - if (*m_off > M2_MAX_OFFSET && - *m_len >= M2_MIN_LEN + 1 && *m_len <= M2_MAX_LEN + 1 && - swd->best_off[*m_len-1] && swd->best_off[*m_len-1] <= M2_MAX_OFFSET) - { - *m_len = *m_len - 1; - *m_off = swd->best_off[*m_len]; - return; - } -#endif - -#if 1 - /* M4 -> M2 */ - if (*m_off > M3_MAX_OFFSET && - *m_len >= M4_MAX_LEN + 1 && *m_len <= M2_MAX_LEN + 2 && - swd->best_off[*m_len-2] && swd->best_off[*m_len-2] <= M2_MAX_OFFSET) - { - *m_len = *m_len - 2; - *m_off = swd->best_off[*m_len]; - return; - } -#endif - -#if 1 - /* M4 -> M3 */ - if (*m_off > M3_MAX_OFFSET && - *m_len >= M4_MAX_LEN + 1 && *m_len <= M3_MAX_LEN + 1 && - swd->best_off[*m_len-1] && swd->best_off[*m_len-1] <= M3_MAX_OFFSET) - { - *m_len = *m_len - 1; - *m_off = swd->best_off[*m_len]; - } -#endif -} - -#endif - - -/*********************************************************************** -// -************************************************************************/ - -LZO_PUBLIC(int) -lzo1x_999_compress_internal ( const lzo_bytep in , lzo_uint in_len, - lzo_bytep out, lzo_uintp out_len, - lzo_voidp wrkmem, - const lzo_bytep dict, lzo_uint dict_len, - lzo_callback_p cb, - int try_lazy, - lzo_uint good_length, - lzo_uint max_lazy, - lzo_uint nice_length, - lzo_uint max_chain, - lzo_uint32 flags ) -{ - lzo_bytep op; - const lzo_bytep ii; - lzo_uint lit; - lzo_uint m_len, m_off; - LZO_COMPRESS_T cc; - LZO_COMPRESS_T * const c = &cc; - lzo_swd_p const swd = (lzo_swd_p) wrkmem; - int r; - - /* sanity check */ -#if defined(LZO1X) - LZO_COMPILE_TIME_ASSERT(LZO1X_999_MEM_COMPRESS >= SIZEOF_LZO_SWD_T) -#elif defined(LZO1Y) - LZO_COMPILE_TIME_ASSERT(LZO1Y_999_MEM_COMPRESS >= SIZEOF_LZO_SWD_T) -#elif defined(LZO1Z) - LZO_COMPILE_TIME_ASSERT(LZO1Z_999_MEM_COMPRESS >= SIZEOF_LZO_SWD_T) -#else -# error -#endif - -/* setup parameter defaults */ - /* number of lazy match tries */ - if (try_lazy < 0) - try_lazy = 1; - /* reduce lazy match search if we already have a match with this length */ - if (good_length <= 0) - good_length = 32; - /* do not try a lazy match if we already have a match with this length */ - if (max_lazy <= 0) - max_lazy = 32; - /* stop searching for longer matches than this one */ - if (nice_length <= 0) - nice_length = 0; - /* don't search more positions than this */ - if (max_chain <= 0) - max_chain = SWD_MAX_CHAIN; - - c->init = 0; - c->ip = c->in = in; - c->in_end = in + in_len; - c->out = out; - c->cb = cb; - c->m1a_m = c->m1b_m = c->m2_m = c->m3_m = c->m4_m = 0; - c->lit1_r = c->lit2_r = c->lit3_r = 0; - - op = out; - ii = c->ip; /* point to start of literal run */ - lit = 0; - c->r1_lit = c->r1_m_len = 0; - - r = init_match(c,swd,dict,dict_len,flags); - if (r != 0) - return r; - if (max_chain > 0) - swd->max_chain = max_chain; - if (nice_length > 0) - swd->nice_length = nice_length; - - r = find_match(c,swd,0,0); - if (r != 0) - return r; - while (c->look > 0) - { - lzo_uint ahead; - lzo_uint max_ahead; - int l1, l2, l3; - - c->codesize = pd(op, out); - - m_len = c->m_len; - m_off = c->m_off; - - assert(c->bp == c->ip - c->look); - assert(c->bp >= in); - if (lit == 0) - ii = c->bp; - assert(ii + lit == c->bp); - assert(swd->b_char == *(c->bp)); - - if ( m_len < 2 || - (m_len == 2 && (m_off > M1_MAX_OFFSET || lit == 0 || lit >= 4)) || -#if 1 - /* Do not accept this match for compressed-data compatibility - * with LZO v1.01 and before - * [ might be a problem for decompress() and optimize() ] - */ - (m_len == 2 && op == out) || -#endif - (op == out && lit == 0)) - { - /* a literal */ - m_len = 0; - } - else if (m_len == M2_MIN_LEN) - { - /* compression ratio improves if we code a literal in some cases */ - if (m_off > MX_MAX_OFFSET && lit >= 4) - m_len = 0; - } - - if (m_len == 0) - { - /* a literal */ - lit++; - swd->max_chain = max_chain; - r = find_match(c,swd,1,0); - assert(r == 0); - continue; - } - - /* a match */ -#if defined(SWD_BEST_OFF) - if (swd->use_best_off) - better_match(swd,&m_len,&m_off); -#endif - assert_match(swd,m_len,m_off); - - - - /* shall we try a lazy match ? */ - ahead = 0; - if (try_lazy <= 0 || m_len >= max_lazy) - { - /* no */ - l1 = 0; - max_ahead = 0; - } - else - { - /* yes, try a lazy match */ - l1 = len_of_coded_match(m_len,m_off,lit); - assert(l1 > 0); -#if 1 - max_ahead = LZO_MIN((lzo_uint)try_lazy, (lzo_uint)l1 - 1); -#else - max_ahead = LZO_MIN3(try_lazy, l1, m_len - 1); -#endif - } - - - while (ahead < max_ahead && c->look > m_len) - { - lzo_int lazy_match_min_gain; - - if (m_len >= good_length) - swd->max_chain = max_chain >> 2; - else - swd->max_chain = max_chain; - r = find_match(c,swd,1,0); - ahead++; - - assert(r == 0); - assert(c->look > 0); - assert(ii + lit + ahead == c->bp); - -#if defined(LZO1Z) - if (m_off == c->last_m_off && c->m_off != c->last_m_off) - if (m_len >= M2_MIN_LEN && m_len <= M2_MAX_LEN) - c->m_len = 0; -#endif - if (c->m_len < m_len) - continue; -#if 1 - if (c->m_len == m_len && c->m_off >= m_off) - continue; -#endif -#if defined(SWD_BEST_OFF) - if (swd->use_best_off) - better_match(swd,&c->m_len,&c->m_off); -#endif - l2 = len_of_coded_match(c->m_len,c->m_off,lit+ahead); - if (l2 < 0) - continue; -#if 0 - if (c->m_len == m_len && l2 >= l1) - continue; -#endif - - -#if 1 - /* compressed-data compatibility [see above] */ - l3 = (op == out) ? -1 : len_of_coded_match(ahead,m_off,lit); -#else - l3 = len_of_coded_match(ahead,m_off,lit); -#endif - - lazy_match_min_gain = min_gain(ahead,lit,lit+ahead,l1,l2,l3); - if (c->m_len >= m_len + lazy_match_min_gain) - { - c->lazy++; - assert_match(swd,c->m_len,c->m_off); - - if (l3 > 0) - { - /* code previous run */ - op = code_run(c,op,ii,lit,ahead); - lit = 0; - /* code shortened match */ - op = code_match(c,op,ahead,m_off); - } - else - { - lit += ahead; - assert(ii + lit == c->bp); - } - goto lazy_match_done; - } - } - - - assert(ii + lit + ahead == c->bp); - - /* 1 - code run */ - op = code_run(c,op,ii,lit,m_len); - lit = 0; - - /* 2 - code match */ - op = code_match(c,op,m_len,m_off); - swd->max_chain = max_chain; - r = find_match(c,swd,m_len,1+ahead); - assert(r == 0); - -lazy_match_done: ; - } - - - /* store final run */ - if (lit > 0) - op = STORE_RUN(c,op,ii,lit); - -#if defined(LZO_EOF_CODE) - *op++ = M4_MARKER | 1; - *op++ = 0; - *op++ = 0; -#endif - - c->codesize = pd(op, out); - assert(c->textsize == in_len); - - *out_len = pd(op, out); - - if (c->cb && c->cb->nprogress) - (*c->cb->nprogress)(c->cb, c->textsize, c->codesize, 0); - -#if 0 - printf("%ld %ld -> %ld %ld: %ld %ld %ld %ld %ld %ld: %ld %ld %ld %ld\n", - (long) c->textsize, (long) in_len, (long) c->codesize, - c->match_bytes, c->m1a_m, c->m1b_m, c->m2_m, c->m3_m, c->m4_m, - c->lit_bytes, c->lit1_r, c->lit2_r, c->lit3_r, c->lazy); -#endif - assert(c->lit_bytes + c->match_bytes == in_len); - - return LZO_E_OK; -} - - -/*********************************************************************** -// -************************************************************************/ - -LZO_PUBLIC(int) -lzo1x_999_compress_level ( const lzo_bytep in , lzo_uint in_len, - lzo_bytep out, lzo_uintp out_len, - lzo_voidp wrkmem, - const lzo_bytep dict, lzo_uint dict_len, - lzo_callback_p cb, - int compression_level ) -{ - static const struct - { - int try_lazy; - lzo_uint good_length; - lzo_uint max_lazy; - lzo_uint nice_length; - lzo_uint max_chain; - lzo_uint32 flags; - } c[9] = { - { 0, 0, 0, 8, 4, 0 }, /* faster compression */ - { 0, 0, 0, 16, 8, 0 }, - { 0, 0, 0, 32, 16, 0 }, - - { 1, 4, 4, 16, 16, 0 }, - { 1, 8, 16, 32, 32, 0 }, - { 1, 8, 16, 128, 128, 0 }, - - { 2, 8, 32, 128, 256, 0 }, - { 2, 32, 128, F, 2048, 1 }, - { 2, F, F, F, 4096, 1 } /* max. compression */ - }; - - if (compression_level < 1 || compression_level > 9) - return LZO_E_ERROR; - - compression_level -= 1; - return lzo1x_999_compress_internal(in, in_len, out, out_len, wrkmem, - dict, dict_len, cb, - c[compression_level].try_lazy, - c[compression_level].good_length, - c[compression_level].max_lazy, -#if 0 - c[compression_level].nice_length, -#else - 0, -#endif - c[compression_level].max_chain, - c[compression_level].flags); -} - - -/*********************************************************************** -// -************************************************************************/ - -LZO_PUBLIC(int) -lzo1x_999_compress_dict ( const lzo_bytep in , lzo_uint in_len, - lzo_bytep out, lzo_uintp out_len, - lzo_voidp wrkmem, - const lzo_bytep dict, lzo_uint dict_len ) -{ - return lzo1x_999_compress_level(in, in_len, out, out_len, wrkmem, - dict, dict_len, 0, 8); -} - -LZO_PUBLIC(int) -lzo1x_999_compress ( const lzo_bytep in , lzo_uint in_len, - lzo_bytep out, lzo_uintp out_len, - lzo_voidp wrkmem ) -{ - return lzo1x_999_compress_level(in, in_len, out, out_len, wrkmem, - NULL, 0, (lzo_callback_p) 0, 8); -} - - -/* -vi:ts=4:et -*/ - |