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-rw-r--r--app/lzo/src/lzo1x_c.ch405
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diff --git a/app/lzo/src/lzo1x_c.ch b/app/lzo/src/lzo1x_c.ch
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-/* lzo1x_c.ch -- implementation of the LZO1[XY]-1 compression algorithm
-
- This file is part of the LZO real-time data compression library.
-
- Copyright (C) 1996-2014 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 1 && defined(DO_COMPRESS) && !defined(do_compress)
- /* choose a unique name to better help PGO optimizations */
-# define do_compress LZO_PP_ECONCAT2(DO_COMPRESS,_core)
-#endif
-
-
-/***********************************************************************
-// compress a block of data.
-************************************************************************/
-
-static __lzo_noinline lzo_uint
-do_compress ( const lzo_bytep in , lzo_uint in_len,
- lzo_bytep out, lzo_uintp out_len,
- lzo_uint ti, lzo_voidp wrkmem)
-{
- const lzo_bytep ip;
- lzo_bytep op;
- const lzo_bytep const in_end = in + in_len;
- const lzo_bytep const ip_end = in + in_len - 20;
- const lzo_bytep ii;
- lzo_dict_p const dict = (lzo_dict_p) wrkmem;
-
- op = out;
- ip = in;
- ii = ip;
-
- ip += ti < 4 ? 4 - ti : 0;
- for (;;)
- {
- const lzo_bytep m_pos;
-#if !(LZO_DETERMINISTIC)
- LZO_DEFINE_UNINITIALIZED_VAR(lzo_uint, m_off, 0);
- lzo_uint m_len;
- lzo_uint dindex;
-next:
- if __lzo_unlikely(ip >= ip_end)
- break;
- DINDEX1(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;
- DINDEX2(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 (LZO_OPT_UNALIGNED32)
- if (UA_GET_NE32(m_pos) != UA_GET_NE32(ip))
-#else
- if (m_pos[0] != ip[0] || m_pos[1] != ip[1] || m_pos[2] != ip[2] || m_pos[3] != ip[3])
-#endif
- {
- /* a literal */
-literal:
- UPDATE_I(dict,0,dindex,ip,in);
- ip += 1 + ((ip - ii) >> 5);
- continue;
- }
-/*match:*/
- UPDATE_I(dict,0,dindex,ip,in);
-#else
- lzo_uint m_off;
- lzo_uint m_len;
- {
- lzo_uint32_t dv;
- lzo_uint dindex;
-literal:
- ip += 1 + ((ip - ii) >> 5);
-next:
- if __lzo_unlikely(ip >= ip_end)
- break;
- dv = UA_GET_LE32(ip);
- dindex = DINDEX(dv,ip);
- GINDEX(m_off,m_pos,in+dict,dindex,in);
- UPDATE_I(dict,0,dindex,ip,in);
- if __lzo_unlikely(dv != UA_GET_LE32(m_pos))
- goto literal;
- }
-#endif
-
- /* a match */
-
- ii -= ti; ti = 0;
- {
- lzo_uint t = pd(ip,ii);
- if (t != 0)
- {
- if (t <= 3)
- {
- op[-2] = LZO_BYTE(op[-2] | t);
-#if (LZO_OPT_UNALIGNED32)
- UA_COPY4(op, ii);
- op += t;
-#else
- { do *op++ = *ii++; while (--t > 0); }
-#endif
- }
-#if (LZO_OPT_UNALIGNED32) || (LZO_OPT_UNALIGNED64)
- else if (t <= 16)
- {
- *op++ = LZO_BYTE(t - 3);
- UA_COPY8(op, ii);
- UA_COPY8(op+8, ii+8);
- op += t;
- }
-#endif
- else
- {
- if (t <= 18)
- *op++ = LZO_BYTE(t - 3);
- else
- {
- lzo_uint tt = t - 18;
- *op++ = 0;
- while __lzo_unlikely(tt > 255)
- {
- tt -= 255;
- UA_SET1(op, 0);
- op++;
- }
- assert(tt > 0);
- *op++ = LZO_BYTE(tt);
- }
-#if (LZO_OPT_UNALIGNED32) || (LZO_OPT_UNALIGNED64)
- do {
- UA_COPY8(op, ii);
- UA_COPY8(op+8, ii+8);
- op += 16; ii += 16; t -= 16;
- } while (t >= 16); if (t > 0)
-#endif
- { do *op++ = *ii++; while (--t > 0); }
- }
- }
- }
- m_len = 4;
- {
-#if (LZO_OPT_UNALIGNED64)
- lzo_uint64_t v;
- v = UA_GET_NE64(ip + m_len) ^ UA_GET_NE64(m_pos + m_len);
- if __lzo_unlikely(v == 0) {
- do {
- m_len += 8;
- v = UA_GET_NE64(ip + m_len) ^ UA_GET_NE64(m_pos + m_len);
- if __lzo_unlikely(ip + m_len >= ip_end)
- goto m_len_done;
- } while (v == 0);
- }
-#if (LZO_ABI_BIG_ENDIAN) && defined(lzo_bitops_ctlz64)
- m_len += lzo_bitops_ctlz64(v) / CHAR_BIT;
-#elif (LZO_ABI_BIG_ENDIAN)
- if ((v >> (64 - CHAR_BIT)) == 0) do {
- v <<= CHAR_BIT;
- m_len += 1;
- } while ((v >> (64 - CHAR_BIT)) == 0);
-#elif (LZO_ABI_LITTLE_ENDIAN) && defined(lzo_bitops_cttz64)
- m_len += lzo_bitops_cttz64(v) / CHAR_BIT;
-#elif (LZO_ABI_LITTLE_ENDIAN)
- if ((v & UCHAR_MAX) == 0) do {
- v >>= CHAR_BIT;
- m_len += 1;
- } while ((v & UCHAR_MAX) == 0);
-#else
- if (ip[m_len] == m_pos[m_len]) do {
- m_len += 1;
- } while (ip[m_len] == m_pos[m_len]);
-#endif
-#elif (LZO_OPT_UNALIGNED32)
- lzo_uint32_t v;
- v = UA_GET_NE32(ip + m_len) ^ UA_GET_NE32(m_pos + m_len);
- if __lzo_unlikely(v == 0) {
- do {
- m_len += 4;
- v = UA_GET_NE32(ip + m_len) ^ UA_GET_NE32(m_pos + m_len);
- if (v != 0)
- break;
- m_len += 4;
- v = UA_GET_NE32(ip + m_len) ^ UA_GET_NE32(m_pos + m_len);
- if __lzo_unlikely(ip + m_len >= ip_end)
- goto m_len_done;
- } while (v == 0);
- }
-#if (LZO_ABI_BIG_ENDIAN) && defined(lzo_bitops_ctlz32)
- m_len += lzo_bitops_ctlz32(v) / CHAR_BIT;
-#elif (LZO_ABI_BIG_ENDIAN)
- if ((v >> (32 - CHAR_BIT)) == 0) do {
- v <<= CHAR_BIT;
- m_len += 1;
- } while ((v >> (32 - CHAR_BIT)) == 0);
-#elif (LZO_ABI_LITTLE_ENDIAN) && defined(lzo_bitops_cttz32)
- m_len += lzo_bitops_cttz32(v) / CHAR_BIT;
-#elif (LZO_ABI_LITTLE_ENDIAN)
- if ((v & UCHAR_MAX) == 0) do {
- v >>= CHAR_BIT;
- m_len += 1;
- } while ((v & UCHAR_MAX) == 0);
-#else
- if (ip[m_len] == m_pos[m_len]) do {
- m_len += 1;
- } while (ip[m_len] == m_pos[m_len]);
-#endif
-#else
- if __lzo_unlikely(ip[m_len] == m_pos[m_len]) {
- do {
- m_len += 1;
- if (ip[m_len] != m_pos[m_len])
- break;
- m_len += 1;
- if (ip[m_len] != m_pos[m_len])
- break;
- m_len += 1;
- if (ip[m_len] != m_pos[m_len])
- break;
- m_len += 1;
- if (ip[m_len] != m_pos[m_len])
- break;
- m_len += 1;
- if (ip[m_len] != m_pos[m_len])
- break;
- m_len += 1;
- if (ip[m_len] != m_pos[m_len])
- break;
- m_len += 1;
- if (ip[m_len] != m_pos[m_len])
- break;
- m_len += 1;
- if __lzo_unlikely(ip + m_len >= ip_end)
- goto m_len_done;
- } while (ip[m_len] == m_pos[m_len]);
- }
-#endif
- }
-m_len_done:
- m_off = pd(ip,m_pos);
- ip += m_len;
- ii = ip;
- if (m_len <= M2_MAX_LEN && m_off <= M2_MAX_OFFSET)
- {
- m_off -= 1;
-#if defined(LZO1X)
- *op++ = LZO_BYTE(((m_len - 1) << 5) | ((m_off & 7) << 2));
- *op++ = LZO_BYTE(m_off >> 3);
-#elif defined(LZO1Y)
- *op++ = LZO_BYTE(((m_len + 1) << 4) | ((m_off & 3) << 2));
- *op++ = LZO_BYTE(m_off >> 2);
-#endif
- }
- else if (m_off <= M3_MAX_OFFSET)
- {
- 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 __lzo_unlikely(m_len > 255)
- {
- m_len -= 255;
- UA_SET1(op, 0);
- op++;
- }
- *op++ = LZO_BYTE(m_len);
- }
- *op++ = LZO_BYTE(m_off << 2);
- *op++ = LZO_BYTE(m_off >> 6);
- }
- else
- {
- m_off -= 0x4000;
- if (m_len <= M4_MAX_LEN)
- *op++ = LZO_BYTE(M4_MARKER | ((m_off >> 11) & 8) | (m_len - 2));
- else
- {
- m_len -= M4_MAX_LEN;
- *op++ = LZO_BYTE(M4_MARKER | ((m_off >> 11) & 8));
- while __lzo_unlikely(m_len > 255)
- {
- m_len -= 255;
- UA_SET1(op, 0);
- op++;
- }
- *op++ = LZO_BYTE(m_len);
- }
- *op++ = LZO_BYTE(m_off << 2);
- *op++ = LZO_BYTE(m_off >> 6);
- }
- goto next;
- }
-
- *out_len = pd(op, out);
- return pd(in_end,ii-ti);
-}
-
-
-/***********************************************************************
-// public entry point
-************************************************************************/
-
-LZO_PUBLIC(int)
-DO_COMPRESS ( const lzo_bytep in , lzo_uint in_len,
- lzo_bytep out, lzo_uintp out_len,
- lzo_voidp wrkmem )
-{
- const lzo_bytep ip = in;
- lzo_bytep op = out;
- lzo_uint l = in_len;
- lzo_uint t = 0;
-
- while (l > 20)
- {
- lzo_uint ll = l;
- lzo_uintptr_t ll_end;
-#if 0 || (LZO_DETERMINISTIC)
- ll = LZO_MIN(ll, 49152);
-#endif
- ll_end = (lzo_uintptr_t)ip + ll;
- if ((ll_end + ((t + ll) >> 5)) <= ll_end || (const lzo_bytep)(ll_end + ((t + ll) >> 5)) <= ip + ll)
- break;
-#if (LZO_DETERMINISTIC)
- lzo_memset(wrkmem, 0, ((lzo_uint)1 << D_BITS) * sizeof(lzo_dict_t));
-#endif
- t = do_compress(ip,ll,op,out_len,t,wrkmem);
- ip += ll;
- op += *out_len;
- l -= ll;
- }
- t += l;
-
- if (t > 0)
- {
- const lzo_bytep ii = in + in_len - t;
-
- if (op == out && t <= 238)
- *op++ = LZO_BYTE(17 + t);
- else if (t <= 3)
- op[-2] = LZO_BYTE(op[-2] | t);
- else if (t <= 18)
- *op++ = LZO_BYTE(t - 3);
- else
- {
- lzo_uint tt = t - 18;
-
- *op++ = 0;
- while (tt > 255)
- {
- tt -= 255;
- UA_SET1(op, 0);
- op++;
- }
- assert(tt > 0);
- *op++ = LZO_BYTE(tt);
- }
- UA_COPYN(op, ii, t);
- op += t;
- }
-
- *op++ = M4_MARKER | 1;
- *op++ = 0;
- *op++ = 0;
-
- *out_len = pd(op, out);
- return LZO_E_OK;
-}
-
-
-/*
-vi:ts=4:et
-*/
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