source: branches/samhain_3_1/src/minilzo.c@ 577

Last change on this file since 577 was 455, checked in by katerina, 10 years ago

Fix for ticket #354 (LZO vulnerability, does not affect samhain).
File size: 64.1 KB
Line 
1/* minilzo.c -- mini subset of the LZO real-time data compression library
2
3 This file is part of the LZO real-time data compression library.
4
5 Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
6 Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
7 Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
8 Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
9
10 The LZO library is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2 of
13 the License, or (at your option) any later version.
14
15 The LZO library is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with the LZO library; see the file COPYING.
22 If not, write to the Free Software Foundation, Inc.,
23 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24
25 Markus F.X.J. Oberhumer
26 <markus.oberhumer@jk.uni-linz.ac.at>
27 http://wildsau.idv.uni-linz.ac.at/mfx/lzo.html
28 */
29
30/*
31 * NOTE:
32 * the full LZO package can be found at
33 * http://wildsau.idv.uni-linz.ac.at/mfx/lzo.html
34 */
35
36#define _ANSI_C_SOURCE
37#define _POSIX_SOURCE
38
39
40
41#define __LZO_IN_MINILZO
42
43#ifdef MINILZO_HAVE_CONFIG_H
44# include <config.h>
45#endif
46
47#undef LZO_HAVE_CONFIG_H
48#include "minilzo.h"
49
50#if !defined(MINILZO_VERSION) || (MINILZO_VERSION != 0x1060)
51# error "version mismatch in miniLZO source files"
52#endif
53
54#ifdef MINILZO_HAVE_CONFIG_H
55# define LZO_HAVE_CONFIG_H
56#endif
57
58#if !defined(LZO_NO_SYS_TYPES_H)
59# include <sys/types.h>
60#endif
61#include <stdio.h>
62
63#ifndef __LZO_CONF_H
64#define __LZO_CONF_H
65
66#if !defined(__LZO_IN_MINILZO)
67# ifndef __LZOCONF_H
68# include <lzoconf.h>
69# endif
70#endif
71
72#if !defined(LZO_HAVE_CONFIG_H)
73# include <stddef.h>
74# include <string.h>
75# if !defined(NO_STDLIB_H)
76# include <stdlib.h>
77# endif
78# define HAVE_MEMCMP
79# define HAVE_MEMCPY
80# define HAVE_MEMMOVE
81# define HAVE_MEMSET
82#else
83# include <sys/types.h>
84# if defined(STDC_HEADERS)
85# include <string.h>
86# include <stdlib.h>
87# endif
88# if defined(HAVE_STDDEF_H)
89# include <stddef.h>
90# endif
91# if defined(HAVE_MEMORY_H)
92# include <memory.h>
93# endif
94#endif
95
96#if defined(__LZO_DOS16) || defined(__LZO_WIN16)
97# define HAVE_MALLOC_H
98# define HAVE_HALLOC
99#endif
100
101#undef NDEBUG
102#if !defined(LZO_DEBUG)
103# define NDEBUG
104#endif
105#if defined(LZO_DEBUG) || !defined(NDEBUG)
106# if !defined(NO_STDIO_H)
107# include <stdio.h>
108# endif
109#endif
110#include <assert.h>
111
112#if defined(__BOUNDS_CHECKING_ON)
113# include <unchecked.h>
114#else
115# define BOUNDS_CHECKING_OFF_DURING(stmt) stmt
116# define BOUNDS_CHECKING_OFF_IN_EXPR(expr) (expr)
117#endif
118
119#if !defined(LZO_UNUSED)
120# define LZO_UNUSED(parm) (parm = parm)
121#endif
122
123#if !defined(__inline__) && !defined(__GNUC__)
124# if defined(__cplusplus)
125# define __inline__ inline
126# else
127# define __inline__
128# endif
129#endif
130
131#if defined(NO_MEMCMP)
132# undef HAVE_MEMCMP
133#endif
134
135#if !defined(HAVE_MEMCMP)
136# undef memcmp
137# define memcmp lzo_memcmp
138#endif
139#if !defined(HAVE_MEMCPY)
140# undef memcpy
141# define memcpy lzo_memcpy
142#endif
143#if !defined(HAVE_MEMMOVE)
144# undef memmove
145# define memmove lzo_memmove
146#endif
147#if !defined(HAVE_MEMSET)
148# undef memset
149# define memset lzo_memset
150#endif
151
152#if 1
153# define LZO_BYTE(x) ((unsigned char) (x))
154#else
155# define LZO_BYTE(x) ((unsigned char) ((x) & 0xff))
156#endif
157#if 0
158# define LZO_USHORT(x) ((unsigned short) (x))
159#else
160# define LZO_USHORT(x) ((unsigned short) ((x) & 0xffff))
161#endif
162
163#define LZO_MAX(a,b) ((a) >= (b) ? (a) : (b))
164#define LZO_MIN(a,b) ((a) <= (b) ? (a) : (b))
165#define LZO_MAX3(a,b,c) ((a) >= (b) ? LZO_MAX(a,c) : LZO_MAX(b,c))
166#define LZO_MIN3(a,b,c) ((a) <= (b) ? LZO_MIN(a,c) : LZO_MIN(b,c))
167
168#define lzo_sizeof(type) ((lzo_uint) (sizeof(type)))
169
170#define LZO_HIGH(array) ((lzo_uint) (sizeof(array)/sizeof(*(array))))
171
172#define LZO_SIZE(bits) (1u << (bits))
173#define LZO_MASK(bits) (LZO_SIZE(bits) - 1)
174
175#define LZO_LSIZE(bits) (1ul << (bits))
176#define LZO_LMASK(bits) (LZO_LSIZE(bits) - 1)
177
178#define LZO_USIZE(bits) ((lzo_uint) 1 << (bits))
179#define LZO_UMASK(bits) (LZO_USIZE(bits) - 1)
180
181#define LZO_STYPE_MAX(b) (((1l << (8*(b)-2)) - 1l) + (1l << (8*(b)-2)))
182#define LZO_UTYPE_MAX(b) (((1ul << (8*(b)-1)) - 1ul) + (1ul << (8*(b)-1)))
183
184#if !defined(SIZEOF_UNSIGNED)
185# if (UINT_MAX == 0xffff)
186# define SIZEOF_UNSIGNED 2
187# elif (UINT_MAX == LZO_0xffffffffL)
188# define SIZEOF_UNSIGNED 4
189# elif (UINT_MAX >= LZO_0xffffffffL)
190# define SIZEOF_UNSIGNED 8
191# else
192# error SIZEOF_UNSIGNED
193# endif
194#endif
195
196#if !defined(SIZEOF_UNSIGNED_LONG)
197# if (ULONG_MAX == LZO_0xffffffffL)
198# define SIZEOF_UNSIGNED_LONG 4
199# elif (ULONG_MAX >= LZO_0xffffffffL)
200# define SIZEOF_UNSIGNED_LONG 8
201# else
202# error SIZEOF_UNSIGNED_LONG
203# endif
204#endif
205
206#if !defined(SIZEOF_SIZE_T)
207# define SIZEOF_SIZE_T SIZEOF_UNSIGNED
208#endif
209#if !defined(SIZE_T_MAX)
210# define SIZE_T_MAX LZO_UTYPE_MAX(SIZEOF_SIZE_T)
211#endif
212
213#if 1 && defined(__LZO_i386) && (UINT_MAX == LZO_0xffffffffL)
214# if !defined(LZO_UNALIGNED_OK_2) && (USHRT_MAX == 0xffff)
215# define LZO_UNALIGNED_OK_2
216# endif
217# if !defined(LZO_UNALIGNED_OK_4) && (LZO_UINT32_MAX == LZO_0xffffffffL)
218# define LZO_UNALIGNED_OK_4
219# endif
220#endif
221
222#if defined(LZO_UNALIGNED_OK_2) || defined(LZO_UNALIGNED_OK_4)
223# if !defined(LZO_UNALIGNED_OK)
224# define LZO_UNALIGNED_OK
225# endif
226#endif
227
228#if defined(__LZO_NO_UNALIGNED)
229# undef LZO_UNALIGNED_OK
230# undef LZO_UNALIGNED_OK_2
231# undef LZO_UNALIGNED_OK_4
232#endif
233
234#if defined(LZO_UNALIGNED_OK_2) && (USHRT_MAX != 0xffff)
235# error "LZO_UNALIGNED_OK_2 must not be defined on this system"
236#endif
237#if defined(LZO_UNALIGNED_OK_4) && (LZO_UINT32_MAX != LZO_0xffffffffL)
238# error "LZO_UNALIGNED_OK_4 must not be defined on this system"
239#endif
240
241#if defined(__LZO_NO_ALIGNED)
242# undef LZO_ALIGNED_OK_4
243#endif
244
245#if defined(LZO_ALIGNED_OK_4) && (LZO_UINT32_MAX != LZO_0xffffffffL)
246# error "LZO_ALIGNED_OK_4 must not be defined on this system"
247#endif
248
249#define LZO_LITTLE_ENDIAN 1234
250#define LZO_BIG_ENDIAN 4321
251#define LZO_PDP_ENDIAN 3412
252
253#if !defined(LZO_BYTE_ORDER)
254# if defined(MFX_BYTE_ORDER)
255# define LZO_BYTE_ORDER MFX_BYTE_ORDER
256# elif defined(__LZO_i386)
257# define LZO_BYTE_ORDER LZO_LITTLE_ENDIAN
258# elif defined(BYTE_ORDER)
259# define LZO_BYTE_ORDER BYTE_ORDER
260# elif defined(__BYTE_ORDER)
261# define LZO_BYTE_ORDER __BYTE_ORDER
262# endif
263#endif
264
265#if defined(LZO_BYTE_ORDER)
266# if (LZO_BYTE_ORDER != LZO_LITTLE_ENDIAN) && \
267 (LZO_BYTE_ORDER != LZO_BIG_ENDIAN)
268# error "invalid LZO_BYTE_ORDER"
269# endif
270#endif
271
272#if defined(LZO_UNALIGNED_OK) && !defined(LZO_BYTE_ORDER)
273# error "LZO_BYTE_ORDER is not defined"
274#endif
275
276#define LZO_OPTIMIZE_GNUC_i386_IS_BUGGY
277
278#if defined(NDEBUG) && !defined(LZO_DEBUG) && !defined(__BOUNDS_CHECKING_ON)
279# if defined(__GNUC__) && defined(__i386__)
280# if !defined(LZO_OPTIMIZE_GNUC_i386_IS_BUGGY)
281# define LZO_OPTIMIZE_GNUC_i386
282# endif
283# endif
284#endif
285
286__LZO_EXTERN_C int __lzo_init_done;
287__LZO_EXTERN_C const lzo_byte __lzo_copyright[];
288LZO_EXTERN(const lzo_byte *) lzo_copyright(void);
289__LZO_EXTERN_C const lzo_uint32 _lzo_crc32_table[256];
290
291#define _LZO_STRINGIZE(x) #x
292#define _LZO_MEXPAND(x) _LZO_STRINGIZE(x)
293
294#define _LZO_CONCAT2(a,b) a ## b
295#define _LZO_CONCAT3(a,b,c) a ## b ## c
296#define _LZO_CONCAT4(a,b,c,d) a ## b ## c ## d
297#define _LZO_CONCAT5(a,b,c,d,e) a ## b ## c ## d ## e
298
299#define _LZO_ECONCAT2(a,b) _LZO_CONCAT2(a,b)
300#define _LZO_ECONCAT3(a,b,c) _LZO_CONCAT3(a,b,c)
301#define _LZO_ECONCAT4(a,b,c,d) _LZO_CONCAT4(a,b,c,d)
302#define _LZO_ECONCAT5(a,b,c,d,e) _LZO_CONCAT5(a,b,c,d,e)
303
304#if 0
305
306#define __LZO_IS_COMPRESS_QUERY(i,il,o,ol,w) ((lzo_voidp)(o) == (w))
307#define __LZO_QUERY_COMPRESS(i,il,o,ol,w,n,s) \
308 (*ol = (n)*(s), LZO_E_OK)
309
310#define __LZO_IS_DECOMPRESS_QUERY(i,il,o,ol,w) ((lzo_voidp)(o) == (w))
311#define __LZO_QUERY_DECOMPRESS(i,il,o,ol,w,n,s) \
312 (*ol = (n)*(s), LZO_E_OK)
313
314#define __LZO_IS_OPTIMIZE_QUERY(i,il,o,ol,w) ((lzo_voidp)(o) == (w))
315#define __LZO_QUERY_OPTIMIZE(i,il,o,ol,w,n,s) \
316 (*ol = (n)*(s), LZO_E_OK)
317
318#endif
319
320#ifndef __LZO_PTR_H
321#define __LZO_PTR_H
322
323#ifdef __cplusplus
324extern "C" {
325#endif
326
327#if defined(__LZO_DOS16) || defined(__LZO_WIN16)
328# include <dos.h>
329# if 1 && defined(__WATCOMC__)
330# include <i86.h>
331 __LZO_EXTERN_C unsigned char _HShift;
332# define __LZO_HShift _HShift
333# elif 1 && defined(_MSC_VER)
334 __LZO_EXTERN_C unsigned short __near _AHSHIFT;
335# define __LZO_HShift ((unsigned) &_AHSHIFT)
336# elif defined(__LZO_WIN16)
337# define __LZO_HShift 3
338# else
339# define __LZO_HShift 12
340# endif
341# if !defined(_FP_SEG) && defined(FP_SEG)
342# define _FP_SEG FP_SEG
343# endif
344# if !defined(_FP_OFF) && defined(FP_OFF)
345# define _FP_OFF FP_OFF
346# endif
347#endif
348
349#if (UINT_MAX >= LZO_0xffffffffL)
350 typedef ptrdiff_t lzo_ptrdiff_t;
351#else
352 typedef long lzo_ptrdiff_t;
353#endif
354
355#if !defined(__LZO_HAVE_PTR_T)
356# if defined(lzo_ptr_t)
357# define __LZO_HAVE_PTR_T
358# endif
359#endif
360#if !defined(__LZO_HAVE_PTR_T)
361# if defined(SIZEOF_CHAR_P) && defined(SIZEOF_UNSIGNED_LONG)
362# if (SIZEOF_CHAR_P == SIZEOF_UNSIGNED_LONG)
363 typedef unsigned long lzo_ptr_t;
364 typedef long lzo_sptr_t;
365# define __LZO_HAVE_PTR_T
366# endif
367# endif
368#endif
369#if !defined(__LZO_HAVE_PTR_T)
370# if defined(SIZEOF_CHAR_P) && defined(SIZEOF_UNSIGNED)
371# if (SIZEOF_CHAR_P == SIZEOF_UNSIGNED)
372 typedef unsigned int lzo_ptr_t;
373 typedef int lzo_sptr_t;
374# define __LZO_HAVE_PTR_T
375# endif
376# endif
377#endif
378#if !defined(__LZO_HAVE_PTR_T)
379# if defined(SIZEOF_CHAR_P) && defined(SIZEOF_UNSIGNED_SHORT)
380# if (SIZEOF_CHAR_P == SIZEOF_UNSIGNED_SHORT)
381 typedef unsigned short lzo_ptr_t;
382 typedef short lzo_sptr_t;
383# define __LZO_HAVE_PTR_T
384# endif
385# endif
386#endif
387#if !defined(__LZO_HAVE_PTR_T)
388# if defined(LZO_HAVE_CONFIG_H) || defined(SIZEOF_CHAR_P)
389# error "no suitable type for lzo_ptr_t"
390# else
391 typedef unsigned long lzo_ptr_t;
392 typedef long lzo_sptr_t;
393# define __LZO_HAVE_PTR_T
394# endif
395#endif
396
397#if defined(__LZO_DOS16) || defined(__LZO_WIN16)
398#define PTR(a) ((lzo_bytep) (a))
399#define PTR_ALIGNED_4(a) ((_FP_OFF(a) & 3) == 0)
400#define PTR_ALIGNED2_4(a,b) (((_FP_OFF(a) | _FP_OFF(b)) & 3) == 0)
401#else
402#define PTR(a) ((lzo_ptr_t) (a))
403#define PTR_LINEAR(a) PTR(a)
404#define PTR_ALIGNED_4(a) ((PTR_LINEAR(a) & 3) == 0)
405#define PTR_ALIGNED_8(a) ((PTR_LINEAR(a) & 7) == 0)
406#define PTR_ALIGNED2_4(a,b) (((PTR_LINEAR(a) | PTR_LINEAR(b)) & 3) == 0)
407#define PTR_ALIGNED2_8(a,b) (((PTR_LINEAR(a) | PTR_LINEAR(b)) & 7) == 0)
408#endif
409
410#define PTR_LT(a,b) (PTR(a) < PTR(b))
411#define PTR_GE(a,b) (PTR(a) >= PTR(b))
412#define PTR_DIFF(a,b) ((lzo_ptrdiff_t) (PTR(a) - PTR(b)))
413
414LZO_EXTERN(lzo_ptr_t)
415__lzo_ptr_linear(const lzo_voidp ptr);
416
417typedef union
418{
419 char a_char;
420 unsigned char a_uchar;
421 short a_short;
422 unsigned short a_ushort;
423 int a_int;
424 unsigned int a_uint;
425 long a_long;
426 unsigned long a_ulong;
427 lzo_int a_lzo_int;
428 lzo_uint a_lzo_uint;
429 lzo_int32 a_lzo_int32;
430 lzo_uint32 a_lzo_uint32;
431 ptrdiff_t a_ptrdiff_t;
432 lzo_ptrdiff_t a_lzo_ptrdiff_t;
433 lzo_ptr_t a_lzo_ptr_t;
434 char * a_charp;
435 lzo_bytep a_lzo_bytep;
436 lzo_bytepp a_lzo_bytepp;
437}
438lzo_align_t;
439
440#ifdef __cplusplus
441}
442#endif
443
444#endif
445
446#define LZO_DETERMINISTIC
447
448#define LZO_DICT_USE_PTR
449#if defined(__LZO_DOS16) || defined(__LZO_WIN16) || defined(__LZO_STRICT_16BIT)
450# undef LZO_DICT_USE_PTR
451#endif
452
453#if defined(LZO_DICT_USE_PTR)
454# define lzo_dict_t const lzo_bytep
455# define lzo_dict_p lzo_dict_t __LZO_MMODEL *
456#else
457# define lzo_dict_t lzo_uint
458# define lzo_dict_p lzo_dict_t __LZO_MMODEL *
459#endif
460
461#if !defined(lzo_moff_t)
462#define lzo_moff_t lzo_uint
463#endif
464
465#endif
466
467LZO_PUBLIC(lzo_ptr_t)
468__lzo_ptr_linear(const lzo_voidp ptr)
469{
470 lzo_ptr_t p;
471
472#if defined(__LZO_DOS16) || defined(__LZO_WIN16)
473 p = (((lzo_ptr_t)(_FP_SEG(ptr))) << (16 - __LZO_HShift)) + (_FP_OFF(ptr));
474#else
475 p = PTR_LINEAR(ptr);
476#endif
477
478 return p;
479}
480
481LZO_PUBLIC(unsigned)
482__lzo_align_gap(const lzo_voidp ptr, lzo_uint size)
483{
484 lzo_ptr_t p, s, n;
485
486 assert(size > 0);
487
488 p = __lzo_ptr_linear(ptr);
489 s = (lzo_ptr_t) (size - 1);
490#if 0
491 assert((size & (size - 1)) == 0);
492 n = ((p + s) & ~s) - p;
493#else
494 n = (((p + s) / size) * size) - p;
495#endif
496
497 assert((long)n >= 0);
498 assert(n <= s);
499
500 return (unsigned)n;
501}
502
503#ifndef __LZO_UTIL_H
504#define __LZO_UTIL_H
505
506#ifndef __LZO_CONF_H
507#endif
508
509#ifdef __cplusplus
510extern "C" {
511#endif
512
513#if 1 && defined(HAVE_MEMCPY)
514#if !defined(__LZO_DOS16) && !defined(__LZO_WIN16)
515
516#define MEMCPY8_DS(dest,src,len) \
517 memcpy(dest,src,len); \
518 dest += len; \
519 src += len
520
521#endif
522#endif
523
524#if 0 && !defined(MEMCPY8_DS)
525
526#define MEMCPY8_DS(dest,src,len) \
527 { do { \
528 *dest++ = *src++; \
529 *dest++ = *src++; \
530 *dest++ = *src++; \
531 *dest++ = *src++; \
532 *dest++ = *src++; \
533 *dest++ = *src++; \
534 *dest++ = *src++; \
535 *dest++ = *src++; \
536 len -= 8; \
537 } while (len > 0); }
538
539#endif
540
541#if !defined(MEMCPY8_DS)
542
543#define MEMCPY8_DS(dest,src,len) \
544 { register lzo_uint __l = (len) / 8; \
545 do { \
546 *dest++ = *src++; \
547 *dest++ = *src++; \
548 *dest++ = *src++; \
549 *dest++ = *src++; \
550 *dest++ = *src++; \
551 *dest++ = *src++; \
552 *dest++ = *src++; \
553 *dest++ = *src++; \
554 } while (--__l > 0); }
555
556#endif
557
558#define MEMCPY_DS(dest,src,len) \
559 do *dest++ = *src++; \
560 while (--len > 0)
561
562#define MEMMOVE_DS(dest,src,len) \
563 do *dest++ = *src++; \
564 while (--len > 0)
565
566#if 0 && defined(LZO_OPTIMIZE_GNUC_i386)
567
568#define BZERO8_PTR(s,l,n) \
569__asm__ __volatile__( \
570 "movl %0,%%eax \n" \
571 "movl %1,%%edi \n" \
572 "movl %2,%%ecx \n" \
573 "cld \n" \
574 "rep \n" \
575 "stosl %%eax,(%%edi) \n" \
576 : \
577 :"g" (0),"g" (s),"g" (n) \
578 :"eax","edi","ecx", "memory", "cc" \
579)
580
581#elif (LZO_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMSET)
582
583#if 1
584#define BZERO8_PTR(s,l,n) memset((s),0,(lzo_uint)(l)*(n))
585#else
586#define BZERO8_PTR(s,l,n) memset((lzo_voidp)(s),0,(lzo_uint)(l)*(n))
587#endif
588
589#else
590
591#define BZERO8_PTR(s,l,n) \
592 lzo_memset((lzo_voidp)(s),0,(lzo_uint)(l)*(n))
593
594#endif
595
596#if 0
597#if defined(__GNUC__) && defined(__i386__)
598
599unsigned char lzo_rotr8(unsigned char value, int shift);
600extern __inline__ unsigned char lzo_rotr8(unsigned char value, int shift)
601{
602 unsigned char result;
603
604 __asm__ __volatile__ ("movb %b1, %b0; rorb %b2, %b0"
605 : "=a"(result) : "g"(value), "c"(shift));
606 return result;
607}
608
609unsigned short lzo_rotr16(unsigned short value, int shift);
610extern __inline__ unsigned short lzo_rotr16(unsigned short value, int shift)
611{
612 unsigned short result;
613
614 __asm__ __volatile__ ("movw %b1, %b0; rorw %b2, %b0"
615 : "=a"(result) : "g"(value), "c"(shift));
616 return result;
617}
618
619#endif
620#endif
621
622#ifdef __cplusplus
623}
624#endif
625
626#endif
627
628LZO_PUBLIC(lzo_bool)
629lzo_assert(int expr)
630{
631 return (expr) ? 1 : 0;
632}
633
634/* If you use the LZO library in a product, you *must* keep this
635 * copyright string in the executable of your product.
636 */
637
638const lzo_byte __lzo_copyright[] =
639#if !defined(__LZO_IN_MINLZO)
640 LZO_VERSION_STRING;
641#else
642 "\n\n\n"
643 "LZO real-time data compression library.\n"
644 "Copyright (C) 1996, 1997, 1998, 1999 Markus Franz Xaver Johannes Oberhumer\n"
645 "<markus.oberhumer@jk.uni-linz.ac.at>\n"
646 "http://wildsau.idv.uni-linz.ac.at/mfx/lzo.html\n"
647 "\n"
648 "LZO version: v" LZO_VERSION_STRING ", " LZO_VERSION_DATE "\n"
649 "LZO build date: " __DATE__ " " __TIME__ "\n\n"
650 "LZO special compilation options:\n"
651#ifdef __cplusplus
652 " __cplusplus\n"
653#endif
654#if defined(__PIC__)
655 " __PIC__\n"
656#elif defined(__pic__)
657 " __pic__\n"
658#endif
659#if (UINT_MAX < LZO_0xffffffffL)
660 " 16BIT\n"
661#endif
662#if defined(__LZO_STRICT_16BIT)
663 " __LZO_STRICT_16BIT\n"
664#endif
665#if (UINT_MAX > LZO_0xffffffffL)
666 " UINT_MAX=" _LZO_MEXPAND(UINT_MAX) "\n"
667#endif
668#if (ULONG_MAX > LZO_0xffffffffL)
669 " ULONG_MAX=" _LZO_MEXPAND(ULONG_MAX) "\n"
670#endif
671#if defined(LZO_BYTE_ORDER)
672 " LZO_BYTE_ORDER=" _LZO_MEXPAND(LZO_BYTE_ORDER) "\n"
673#endif
674#if defined(LZO_UNALIGNED_OK_2)
675 " LZO_UNALIGNED_OK_2\n"
676#endif
677#if defined(LZO_UNALIGNED_OK_4)
678 " LZO_UNALIGNED_OK_4\n"
679#endif
680#if defined(LZO_ALIGNED_OK_4)
681 " LZO_ALIGNED_OK_4\n"
682#endif
683#if defined(LZO_DICT_USE_PTR)
684 " LZO_DICT_USE_PTR\n"
685#endif
686#if defined(__LZO_QUERY_COMPRESS)
687 " __LZO_QUERY_COMPRESS\n"
688#endif
689#if defined(__LZO_QUERY_DECOMPRESS)
690 " __LZO_QUERY_DECOMPRESS\n"
691#endif
692#if defined(__LZO_IN_MINILZO)
693 " __LZO_IN_MINILZO\n"
694#endif
695 "\n\n"
696 "$Id: LZO " LZO_VERSION_STRING " built " __DATE__ " " __TIME__
697#if defined(__GNUC__) && defined(__VERSION__)
698 " by gcc " __VERSION__
699#elif defined(__BORLANDC__)
700 " by Borland C " _LZO_MEXPAND(__BORLANDC__)
701#elif defined(_MSC_VER)
702 " by Microsoft C " _LZO_MEXPAND(_MSC_VER)
703#elif defined(__PUREC__)
704 " by Pure C " _LZO_MEXPAND(__PUREC__)
705#elif defined(__SC__)
706 " by Symantec C " _LZO_MEXPAND(__SC__)
707#elif defined(__TURBOC__)
708 " by Turbo C " _LZO_MEXPAND(__TURBOC__)
709#elif defined(__WATCOMC__)
710 " by Watcom C " _LZO_MEXPAND(__WATCOMC__)
711#endif
712 " $\n"
713 "$Copyright: LZO (C) 1996, 1997, 1998, 1999 Markus Franz Xaver Johannes Oberhumer $\n";
714#endif
715
716LZO_PUBLIC(const lzo_byte *)
717lzo_copyright(void)
718{
719 return __lzo_copyright;
720}
721
722LZO_PUBLIC(unsigned)
723lzo_version(void)
724{
725 return LZO_VERSION;
726}
727
728LZO_PUBLIC(const char *)
729lzo_version_string(void)
730{
731 return LZO_VERSION_STRING;
732}
733
734LZO_PUBLIC(const char *)
735lzo_version_date(void)
736{
737 return LZO_VERSION_DATE;
738}
739
740LZO_PUBLIC(const lzo_charp)
741_lzo_version_string(void)
742{
743 return LZO_VERSION_STRING;
744}
745
746LZO_PUBLIC(const lzo_charp)
747_lzo_version_date(void)
748{
749 return LZO_VERSION_DATE;
750}
751
752#define LZO_BASE 65521u
753#define LZO_NMAX 5552
754
755#define LZO_DO1(buf,i) {s1 += buf[i]; s2 += s1;}
756#define LZO_DO2(buf,i) LZO_DO1(buf,i); LZO_DO1(buf,i+1);
757#define LZO_DO4(buf,i) LZO_DO2(buf,i); LZO_DO2(buf,i+2);
758#define LZO_DO8(buf,i) LZO_DO4(buf,i); LZO_DO4(buf,i+4);
759#define LZO_DO16(buf,i) LZO_DO8(buf,i); LZO_DO8(buf,i+8);
760
761LZO_PUBLIC(lzo_uint32)
762lzo_adler32(lzo_uint32 adler, const lzo_byte *buf, lzo_uint len)
763{
764 lzo_uint32 s1 = adler & 0xffff;
765 lzo_uint32 s2 = (adler >> 16) & 0xffff;
766 int k;
767
768 if (buf == NULL)
769 return 1;
770
771 while (len > 0)
772 {
773 k = len < LZO_NMAX ? (int) len : LZO_NMAX;
774 len -= k;
775 if (k >= 16) do
776 {
777 LZO_DO16(buf,0);
778 buf += 16;
779 k -= 16;
780 } while (k >= 16);
781 if (k != 0) do
782 {
783 s1 += *buf++;
784 s2 += s1;
785 } while (--k > 0);
786 s1 %= LZO_BASE;
787 s2 %= LZO_BASE;
788 }
789 return (s2 << 16) | s1;
790}
791
792LZO_PUBLIC(int)
793lzo_memcmp(const lzo_voidp s1, const lzo_voidp s2, lzo_uint len)
794{
795#if (LZO_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMCMP)
796 return memcmp(s1,s2,len);
797#else
798 const lzo_byte *p1 = (const lzo_byte *) s1;
799 const lzo_byte *p2 = (const lzo_byte *) s2;
800 int d;
801
802 if (len > 0) do
803 {
804 d = *p1 - *p2;
805 if (d != 0)
806 return d;
807 p1++;
808 p2++;
809 }
810 while (--len > 0);
811 return 0;
812#endif
813}
814
815LZO_PUBLIC(lzo_voidp)
816lzo_memcpy(lzo_voidp dest, const lzo_voidp src, lzo_uint len)
817{
818#if (LZO_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMCPY)
819 return memcpy(dest,src,len);
820#else
821 lzo_byte *p1 = (lzo_byte *) dest;
822 const lzo_byte *p2 = (const lzo_byte *) src;
823
824 if (len <= 0 || p1 == p2)
825 return dest;
826 do
827 *p1++ = *p2++;
828 while (--len > 0);
829 return dest;
830#endif
831}
832
833LZO_PUBLIC(lzo_voidp)
834lzo_memmove(lzo_voidp dest, const lzo_voidp src, lzo_uint len)
835{
836#if (LZO_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMMOVE)
837 return memmove(dest,src,len);
838#else
839 lzo_byte *p1 = (lzo_byte *) dest;
840 const lzo_byte *p2 = (const lzo_byte *) src;
841
842 if (len <= 0 || p1 == p2)
843 return dest;
844
845 if (p1 < p2)
846 {
847 do
848 *p1++ = *p2++;
849 while (--len > 0);
850 }
851 else
852 {
853 p1 += len;
854 p2 += len;
855 do
856 *--p1 = *--p2;
857 while (--len > 0);
858 }
859 return dest;
860#endif
861}
862
863LZO_PUBLIC(lzo_voidp)
864lzo_memset(lzo_voidp s, int c, lzo_uint len)
865{
866#if (LZO_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMSET)
867 return memset(s,c,len);
868#else
869 lzo_byte *p = (lzo_byte *) s;
870
871 if (len > 0) do
872 *p++ = LZO_BYTE(c);
873 while (--len > 0);
874 return s;
875#endif
876}
877
878#include <stdio.h>
879
880#if 0
881# define IS_SIGNED(type) (((type) (1ul << (8 * sizeof(type) - 1))) < 0)
882# define IS_UNSIGNED(type) (((type) (1ul << (8 * sizeof(type) - 1))) > 0)
883#else
884# define IS_SIGNED(type) (((type) (-1)) < ((type) 0))
885# define IS_UNSIGNED(type) (((type) (-1)) > ((type) 0))
886#endif
887
888static lzo_bool schedule_insns_bug(void);
889static lzo_bool strength_reduce_bug(int *);
890
891#if 0 || defined(LZO_DEBUG)
892static lzo_bool __lzo_assert_fail(const char *s, unsigned line)
893{
894#if defined(__palmos__)
895 printf("LZO assertion failed in line %u: '%s'\n",line,s);
896#else
897 fprintf(stderr,"LZO assertion failed in line %u: '%s'\n",line,s);
898#endif
899 return 0;
900}
901# define __lzo_assert(x) ((x) ? 1 : __lzo_assert_fail(#x,__LINE__))
902#else
903# define __lzo_assert(x) ((x) ? 1 : 0)
904#endif
905
906static lzo_bool basic_integral_check(void)
907{
908 lzo_bool r = 1;
909 lzo_bool sanity;
910
911 r &= __lzo_assert(CHAR_BIT == 8);
912 r &= __lzo_assert(sizeof(char) == 1);
913 r &= __lzo_assert(sizeof(short) >= 2);
914 r &= __lzo_assert(sizeof(long) >= 4);
915 r &= __lzo_assert(sizeof(int) >= sizeof(short));
916 r &= __lzo_assert(sizeof(long) >= sizeof(int));
917
918 r &= __lzo_assert(sizeof(lzo_uint32) >= 4);
919 r &= __lzo_assert(sizeof(lzo_uint32) >= sizeof(unsigned));
920#if defined(__LZO_STRICT_16BIT)
921 r &= __lzo_assert(sizeof(lzo_uint) == 2);
922#else
923 r &= __lzo_assert(sizeof(lzo_uint) >= 4);
924 r &= __lzo_assert(sizeof(lzo_uint) >= sizeof(unsigned));
925#endif
926
927#if defined(SIZEOF_UNSIGNED)
928 r &= __lzo_assert(SIZEOF_UNSIGNED == sizeof(unsigned));
929#endif
930#if defined(SIZEOF_UNSIGNED_LONG)
931 r &= __lzo_assert(SIZEOF_UNSIGNED_LONG == sizeof(unsigned long));
932#endif
933#if defined(SIZEOF_UNSIGNED_SHORT)
934 r &= __lzo_assert(SIZEOF_UNSIGNED_SHORT == sizeof(unsigned short));
935#endif
936#if !defined(__LZO_IN_MINILZO)
937#if defined(SIZEOF_SIZE_T)
938 r &= __lzo_assert(SIZEOF_SIZE_T == sizeof(size_t));
939#endif
940#endif
941
942 sanity = IS_UNSIGNED(unsigned short) && IS_UNSIGNED(unsigned) &&
943 IS_UNSIGNED(unsigned long) &&
944 IS_SIGNED(short) && IS_SIGNED(int) && IS_SIGNED(long);
945 if (sanity)
946 {
947 r &= __lzo_assert(IS_UNSIGNED(lzo_uint32));
948 r &= __lzo_assert(IS_UNSIGNED(lzo_uint));
949 r &= __lzo_assert(IS_SIGNED(lzo_int32));
950 r &= __lzo_assert(IS_SIGNED(lzo_int));
951
952 r &= __lzo_assert(INT_MAX == LZO_STYPE_MAX(sizeof(int)));
953 r &= __lzo_assert(UINT_MAX == LZO_UTYPE_MAX(sizeof(unsigned)));
954 r &= __lzo_assert(LONG_MAX == LZO_STYPE_MAX(sizeof(long)));
955 r &= __lzo_assert(ULONG_MAX == LZO_UTYPE_MAX(sizeof(unsigned long)));
956 r &= __lzo_assert(SHRT_MAX == LZO_STYPE_MAX(sizeof(short)));
957 r &= __lzo_assert(USHRT_MAX == LZO_UTYPE_MAX(sizeof(unsigned short)));
958 r &= __lzo_assert(LZO_UINT32_MAX == LZO_UTYPE_MAX(sizeof(lzo_uint32)));
959 r &= __lzo_assert(LZO_UINT_MAX == LZO_UTYPE_MAX(sizeof(lzo_uint)));
960#if !defined(__LZO_IN_MINILZO)
961 r &= __lzo_assert(SIZE_T_MAX == LZO_UTYPE_MAX(sizeof(size_t)));
962#endif
963 }
964
965#if 0
966 r &= __lzo_assert(LZO_BYTE(257) == 1);
967 r &= __lzo_assert(LZO_USHORT(65537L) == 1);
968#endif
969
970 return r;
971}
972
973static lzo_bool basic_ptr_check(void)
974{
975 lzo_bool r = 1;
976 lzo_bool sanity;
977
978 r &= __lzo_assert(sizeof(char *) >= sizeof(int));
979 r &= __lzo_assert(sizeof(lzo_byte *) >= sizeof(char *));
980
981 r &= __lzo_assert(sizeof(lzo_voidp) == sizeof(lzo_byte *));
982 r &= __lzo_assert(sizeof(lzo_voidp) == sizeof(lzo_voidpp));
983 r &= __lzo_assert(sizeof(lzo_voidp) == sizeof(lzo_bytepp));
984 r &= __lzo_assert(sizeof(lzo_voidp) >= sizeof(lzo_uint));
985
986 r &= __lzo_assert(sizeof(lzo_ptr_t) == sizeof(lzo_voidp));
987 r &= __lzo_assert(sizeof(lzo_ptr_t) >= sizeof(lzo_uint));
988
989 r &= __lzo_assert(sizeof(lzo_ptrdiff_t) >= 4);
990 r &= __lzo_assert(sizeof(lzo_ptrdiff_t) >= sizeof(ptrdiff_t));
991
992#if defined(SIZEOF_CHAR_P)
993 r &= __lzo_assert(SIZEOF_CHAR_P == sizeof(char *));
994#endif
995#if defined(SIZEOF_PTRDIFF_T)
996 r &= __lzo_assert(SIZEOF_PTRDIFF_T == sizeof(ptrdiff_t));
997#endif
998
999 sanity = IS_UNSIGNED(unsigned short) && IS_UNSIGNED(unsigned) &&
1000 IS_UNSIGNED(unsigned long) &&
1001 IS_SIGNED(short) && IS_SIGNED(int) && IS_SIGNED(long);
1002 if (sanity)
1003 {
1004 r &= __lzo_assert(IS_UNSIGNED(lzo_ptr_t));
1005 r &= __lzo_assert(IS_UNSIGNED(lzo_moff_t));
1006 r &= __lzo_assert(IS_SIGNED(lzo_ptrdiff_t));
1007 r &= __lzo_assert(IS_SIGNED(lzo_sptr_t));
1008 }
1009
1010 return r;
1011}
1012
1013static lzo_bool ptr_check(void)
1014{
1015 lzo_bool r = 1;
1016 int i;
1017 char _wrkmem[10 * sizeof(lzo_byte *) + sizeof(lzo_align_t)];
1018 lzo_byte *wrkmem;
1019 const lzo_bytepp dict;
1020 unsigned char x[4 * sizeof(lzo_align_t)];
1021 long d;
1022 lzo_align_t a;
1023
1024 for (i = 0; i < (int) sizeof(x); i++)
1025 x[i] = LZO_BYTE(i);
1026
1027 wrkmem = (lzo_byte *) LZO_PTR_ALIGN_UP(_wrkmem,sizeof(lzo_align_t));
1028 dict = (const lzo_bytepp) wrkmem;
1029
1030 d = (long) ((const lzo_bytep) dict - (const lzo_bytep) _wrkmem);
1031 r &= __lzo_assert(d >= 0);
1032 r &= __lzo_assert(d < (long) sizeof(lzo_align_t));
1033
1034 memset(&a,0xff,sizeof(a));
1035 r &= __lzo_assert(a.a_ushort == USHRT_MAX);
1036 r &= __lzo_assert(a.a_uint == UINT_MAX);
1037 r &= __lzo_assert(a.a_ulong == ULONG_MAX);
1038 r &= __lzo_assert(a.a_lzo_uint == LZO_UINT_MAX);
1039
1040 if (r == 1)
1041 {
1042 for (i = 0; i < 8; i++)
1043 r &= __lzo_assert((const lzo_voidp) (&dict[i]) == (const lzo_voidp) (&wrkmem[i * sizeof(lzo_byte *)]));
1044 }
1045
1046 memset(&a,0,sizeof(a));
1047 r &= __lzo_assert(a.a_charp == NULL);
1048 r &= __lzo_assert(a.a_lzo_bytep == NULL);
1049 r &= __lzo_assert(NULL == 0);
1050 if (r == 1)
1051 {
1052 for (i = 0; i < 10; i++)
1053 dict[i] = wrkmem;
1054 BZERO8_PTR(dict+1,sizeof(dict[0]),8);
1055 r &= __lzo_assert(dict[0] == wrkmem);
1056 for (i = 1; i < 9; i++)
1057 r &= __lzo_assert(dict[i] == NULL);
1058 r &= __lzo_assert(dict[9] == wrkmem);
1059 }
1060
1061 if (r == 1)
1062 {
1063 unsigned k = 1;
1064 const unsigned n = (unsigned) sizeof(lzo_uint32);
1065 lzo_byte *p0;
1066 lzo_byte *p1;
1067
1068 k += __lzo_align_gap(&x[k],n);
1069 p0 = (lzo_bytep) &x[k];
1070#if defined(PTR_LINEAR)
1071 r &= __lzo_assert((PTR_LINEAR(p0) & (n-1)) == 0);
1072#else
1073 r &= __lzo_assert(n == 4);
1074 r &= __lzo_assert(PTR_ALIGNED_4(p0));
1075#endif
1076
1077 r &= __lzo_assert(k >= 1);
1078 p1 = (lzo_bytep) &x[1];
1079 r &= __lzo_assert(PTR_GE(p0,p1));
1080
1081 r &= __lzo_assert(k < 1+n);
1082 p1 = (lzo_bytep) &x[1+n];
1083 r &= __lzo_assert(PTR_LT(p0,p1));
1084
1085 if (r == 1)
1086 {
1087 lzo_uint32 v0 = * (lzo_uint32 *) &x[k];
1088 lzo_uint32 v1 = * (lzo_uint32 *) &x[k+n];
1089
1090 r &= __lzo_assert(v0 > 0);
1091 r &= __lzo_assert(v1 > 0);
1092 }
1093 }
1094
1095 return r;
1096}
1097
1098LZO_PUBLIC(int)
1099_lzo_config_check(void)
1100{
1101 lzo_bool r = 1;
1102 int i;
1103 union {
1104 lzo_uint32 a;
1105 unsigned short b;
1106 lzo_uint32 aa[4];
1107 unsigned char x[4*sizeof(lzo_align_t)];
1108 } u;
1109
1110#if 0
1111 r &= __lzo_assert((const void *)&u == (const void *)&u.a);
1112 r &= __lzo_assert((const void *)&u == (const void *)&u.b);
1113 r &= __lzo_assert((const void *)&u == (const void *)&u.x[0]);
1114 r &= __lzo_assert((const void *)&u == (const void *)&u.aa[0]);
1115#endif
1116
1117 r &= basic_integral_check();
1118 r &= basic_ptr_check();
1119 if (r != 1)
1120 return LZO_E_ERROR;
1121
1122 for (i = 0; i < (int) sizeof(u.x); i++)
1123 u.x[i] = LZO_BYTE(i);
1124
1125#if 0
1126 r &= __lzo_assert( (int) (unsigned char) ((char) -1) == 255);
1127#endif
1128
1129#if defined(LZO_BYTE_ORDER)
1130 if (r == 1)
1131 {
1132# if (LZO_BYTE_ORDER == LZO_LITTLE_ENDIAN)
1133 lzo_uint32 a = (lzo_uint32) (u.a & LZO_0xffffffffL);
1134 unsigned short b = (unsigned short) (u.b & 0xffff);
1135 r &= __lzo_assert(a == 0x03020100L);
1136 r &= __lzo_assert(b == 0x0100);
1137# elif (LZO_BYTE_ORDER == LZO_BIG_ENDIAN)
1138 lzo_uint32 a = u.a >> (8 * sizeof(u.a) - 32);
1139 unsigned short b = u.b >> (8 * sizeof(u.b) - 16);
1140 r &= __lzo_assert(a == 0x00010203L);
1141 r &= __lzo_assert(b == 0x0001);
1142# else
1143# error invalid LZO_BYTE_ORDER
1144# endif
1145 }
1146#endif
1147
1148#if defined(LZO_UNALIGNED_OK_2)
1149 r &= __lzo_assert(sizeof(short) == 2);
1150 if (r == 1)
1151 {
1152 unsigned short b[4];
1153
1154 for (i = 0; i < 4; i++)
1155 b[i] = * (const unsigned short *) &u.x[i];
1156
1157# if (LZO_BYTE_ORDER == LZO_LITTLE_ENDIAN)
1158 r &= __lzo_assert(b[0] == 0x0100);
1159 r &= __lzo_assert(b[1] == 0x0201);
1160 r &= __lzo_assert(b[2] == 0x0302);
1161 r &= __lzo_assert(b[3] == 0x0403);
1162# elif (LZO_BYTE_ORDER == LZO_BIG_ENDIAN)
1163 r &= __lzo_assert(b[0] == 0x0001);
1164 r &= __lzo_assert(b[1] == 0x0102);
1165 r &= __lzo_assert(b[2] == 0x0203);
1166 r &= __lzo_assert(b[3] == 0x0304);
1167# endif
1168 }
1169#endif
1170
1171#if defined(LZO_UNALIGNED_OK_4)
1172 r &= __lzo_assert(sizeof(lzo_uint32) == 4);
1173 if (r == 1)
1174 {
1175 lzo_uint32 a[4];
1176
1177 for (i = 0; i < 4; i++)
1178 a[i] = * (const lzo_uint32 *) &u.x[i];
1179
1180# if (LZO_BYTE_ORDER == LZO_LITTLE_ENDIAN)
1181 r &= __lzo_assert(a[0] == 0x03020100L);
1182 r &= __lzo_assert(a[1] == 0x04030201L);
1183 r &= __lzo_assert(a[2] == 0x05040302L);
1184 r &= __lzo_assert(a[3] == 0x06050403L);
1185# elif (LZO_BYTE_ORDER == LZO_BIG_ENDIAN)
1186 r &= __lzo_assert(a[0] == 0x00010203L);
1187 r &= __lzo_assert(a[1] == 0x01020304L);
1188 r &= __lzo_assert(a[2] == 0x02030405L);
1189 r &= __lzo_assert(a[3] == 0x03040506L);
1190# endif
1191 }
1192#endif
1193
1194#if defined(LZO_ALIGNED_OK_4)
1195 r &= __lzo_assert(sizeof(lzo_uint32) == 4);
1196#endif
1197
1198 r &= __lzo_assert(lzo_sizeof_dict_t == sizeof(lzo_dict_t));
1199
1200#if defined(__LZO_IN_MINLZO)
1201 if (r == 1)
1202 {
1203 lzo_uint32 adler;
1204 adler = lzo_adler32(0, NULL, 0);
1205 adler = lzo_adler32(adler, lzo_copyright(), 200);
1206 r &= __lzo_assert(adler == 0x7ea34377L);
1207 }
1208#endif
1209
1210 if (r == 1)
1211 {
1212 r &= __lzo_assert(!schedule_insns_bug());
1213 }
1214
1215 if (r == 1)
1216 {
1217 static int x[3];
1218 static unsigned xn = 3;
1219 register unsigned j;
1220
1221 for (j = 0; j < xn; j++)
1222 x[j] = (int)j - 3;
1223 r &= __lzo_assert(!strength_reduce_bug(x));
1224 }
1225
1226 if (r == 1)
1227 {
1228 r &= ptr_check();
1229 }
1230
1231 return r == 1 ? LZO_E_OK : LZO_E_ERROR;
1232}
1233
1234static lzo_bool schedule_insns_bug(void)
1235{
1236#if defined(__BOUNDS_CHECKING_ON) || defined(__CHECKER__)
1237 return 0;
1238#else
1239 const int clone[] = {1, 2, 0};
1240 const int *q;
1241 q = clone;
1242 return (*q) ? 0 : 1;
1243#endif
1244}
1245
1246static lzo_bool strength_reduce_bug(int *x)
1247{
1248 return x[0] != -3 || x[1] != -2 || x[2] != -1;
1249}
1250
1251int __lzo_init_done = 0;
1252
1253LZO_PUBLIC(int)
1254__lzo_init2(unsigned v, int s1, int s2, int s3, int s4, int s5,
1255 int s6, int s7, int s8, int s9)
1256{
1257 int r;
1258
1259 __lzo_init_done = 1;
1260
1261 if (v == 0)
1262 return LZO_E_ERROR;
1263
1264 r = (s1 == -1 || s1 == (int) sizeof(short)) &&
1265 (s2 == -1 || s2 == (int) sizeof(int)) &&
1266 (s3 == -1 || s3 == (int) sizeof(long)) &&
1267 (s4 == -1 || s4 == (int) sizeof(lzo_uint32)) &&
1268 (s5 == -1 || s5 == (int) sizeof(lzo_uint)) &&
1269 (s6 == -1 || s6 == (int) lzo_sizeof_dict_t) &&
1270 (s7 == -1 || s7 == (int) sizeof(char *)) &&
1271 (s8 == -1 || s8 == (int) sizeof(lzo_voidp)) &&
1272 (s9 == -1 || s9 == (int) sizeof(lzo_compress_t));
1273 if (!r)
1274 return LZO_E_ERROR;
1275
1276 r = _lzo_config_check();
1277 if (r != LZO_E_OK)
1278 return r;
1279
1280 return r;
1281}
1282
1283#if !defined(__LZO_IN_MINILZO)
1284
1285LZO_EXTERN(int)
1286__lzo_init(unsigned v,int s1,int s2,int s3,int s4,int s5,int s6,int s7);
1287
1288LZO_PUBLIC(int)
1289__lzo_init(unsigned v,int s1,int s2,int s3,int s4,int s5,int s6,int s7)
1290{
1291 if (v == 0 || v > 0x1010)
1292 return LZO_E_ERROR;
1293 return __lzo_init2(v,s1,s2,s3,s4,s5,-1,-1,s6,s7);
1294}
1295
1296#endif
1297
1298#define do_compress _lzo1x_1_do_compress
1299
1300#define LZO_NEED_DICT_H
1301#define D_BITS 14
1302#define D_INDEX1(d,p) d = DM((0x21*DX3(p,5,5,6)) >> 5)
1303#define D_INDEX2(d,p) d = (d & (D_MASK & 0x7ff)) ^ (D_HIGH | 0x1f)
1304
1305#ifndef __LZO_CONFIG1X_H
1306#define __LZO_CONFIG1X_H
1307
1308#if !defined(LZO1X) && !defined(LZO1Y) && !defined(LZO1Z)
1309# define LZO1X
1310#endif
1311
1312#if !defined(__LZO_IN_MINILZO)
1313#include <lzo1x.h>
1314#endif
1315
1316#define LZO_EOF_CODE
1317#undef LZO_DETERMINISTIC
1318
1319#define M1_MAX_OFFSET 0x0400
1320#ifndef M2_MAX_OFFSET
1321#define M2_MAX_OFFSET 0x0800
1322#endif
1323#define M3_MAX_OFFSET 0x4000
1324#define M4_MAX_OFFSET 0xbfff
1325
1326#define MX_MAX_OFFSET (M1_MAX_OFFSET + M2_MAX_OFFSET)
1327
1328#define M1_MIN_LEN 2
1329#define M1_MAX_LEN 2
1330#define M2_MIN_LEN 3
1331#ifndef M2_MAX_LEN
1332#define M2_MAX_LEN 8
1333#endif
1334#define M3_MIN_LEN 3
1335#define M3_MAX_LEN 33
1336#define M4_MIN_LEN 3
1337#define M4_MAX_LEN 9
1338
1339#define M1_MARKER 0
1340#define M2_MARKER 64
1341#define M3_MARKER 32
1342#define M4_MARKER 16
1343
1344#ifndef MIN_LOOKAHEAD
1345#define MIN_LOOKAHEAD (M2_MAX_LEN + 1)
1346#endif
1347
1348#if defined(LZO_NEED_DICT_H)
1349
1350#ifndef LZO_HASH
1351#define LZO_HASH LZO_HASH_LZO_INCREMENTAL_B
1352#endif
1353#define DL_MIN_LEN M2_MIN_LEN
1354
1355#ifndef __LZO_DICT_H
1356#define __LZO_DICT_H
1357
1358#ifdef __cplusplus
1359extern "C" {
1360#endif
1361
1362#if !defined(D_BITS) && defined(DBITS)
1363# define D_BITS DBITS
1364#endif
1365#if !defined(D_BITS)
1366# error D_BITS is not defined
1367#endif
1368#if (D_BITS < 16)
1369# define D_SIZE LZO_SIZE(D_BITS)
1370# define D_MASK LZO_MASK(D_BITS)
1371#else
1372# define D_SIZE LZO_USIZE(D_BITS)
1373# define D_MASK LZO_UMASK(D_BITS)
1374#endif
1375#define D_HIGH ((D_MASK >> 1) + 1)
1376
1377#if !defined(DD_BITS)
1378# define DD_BITS 0
1379#endif
1380#define DD_SIZE LZO_SIZE(DD_BITS)
1381#define DD_MASK LZO_MASK(DD_BITS)
1382
1383#if !defined(DL_BITS)
1384# define DL_BITS (D_BITS - DD_BITS)
1385#endif
1386#if (DL_BITS < 16)
1387# define DL_SIZE LZO_SIZE(DL_BITS)
1388# define DL_MASK LZO_MASK(DL_BITS)
1389#else
1390# define DL_SIZE LZO_USIZE(DL_BITS)
1391# define DL_MASK LZO_UMASK(DL_BITS)
1392#endif
1393
1394#if (D_BITS != DL_BITS + DD_BITS)
1395# error D_BITS does not match
1396#endif
1397#if (D_BITS < 8 || D_BITS > 18)
1398# error invalid D_BITS
1399#endif
1400#if (DL_BITS < 8 || DL_BITS > 20)
1401# error invalid DL_BITS
1402#endif
1403#if (DD_BITS < 0 || DD_BITS > 6)
1404# error invalid DD_BITS
1405#endif
1406
1407#if !defined(DL_MIN_LEN)
1408# define DL_MIN_LEN 3
1409#endif
1410#if !defined(DL_SHIFT)
1411# define DL_SHIFT ((DL_BITS + (DL_MIN_LEN - 1)) / DL_MIN_LEN)
1412#endif
1413
1414#define LZO_HASH_GZIP 1
1415#define LZO_HASH_GZIP_INCREMENTAL 2
1416#define LZO_HASH_LZO_INCREMENTAL_A 3
1417#define LZO_HASH_LZO_INCREMENTAL_B 4
1418
1419#if !defined(LZO_HASH)
1420# error choose a hashing strategy
1421#endif
1422
1423#if (DL_MIN_LEN == 3)
1424# define _DV2_A(p,shift1,shift2) \
1425 (((( (lzo_uint32)((p)[0]) << shift1) ^ (p)[1]) << shift2) ^ (p)[2])
1426# define _DV2_B(p,shift1,shift2) \
1427 (((( (lzo_uint32)((p)[2]) << shift1) ^ (p)[1]) << shift2) ^ (p)[0])
1428# define _DV3_B(p,shift1,shift2,shift3) \
1429 ((_DV2_B((p)+1,shift1,shift2) << (shift3)) ^ (p)[0])
1430#elif (DL_MIN_LEN == 2)
1431# define _DV2_A(p,shift1,shift2) \
1432 (( (lzo_uint32)(p[0]) << shift1) ^ p[1])
1433# define _DV2_B(p,shift1,shift2) \
1434 (( (lzo_uint32)(p[1]) << shift1) ^ p[2])
1435#else
1436# error invalid DL_MIN_LEN
1437#endif
1438#define _DV_A(p,shift) _DV2_A(p,shift,shift)
1439#define _DV_B(p,shift) _DV2_B(p,shift,shift)
1440#define DA2(p,s1,s2) \
1441 (((((lzo_uint32)((p)[2]) << (s2)) + (p)[1]) << (s1)) + (p)[0])
1442#define DS2(p,s1,s2) \
1443 (((((lzo_uint32)((p)[2]) << (s2)) - (p)[1]) << (s1)) - (p)[0])
1444#define DX2(p,s1,s2) \
1445 (((((lzo_uint32)((p)[2]) << (s2)) ^ (p)[1]) << (s1)) ^ (p)[0])
1446#define DA3(p,s1,s2,s3) ((DA2((p)+1,s2,s3) << (s1)) + (p)[0])
1447#define DS3(p,s1,s2,s3) ((DS2((p)+1,s2,s3) << (s1)) - (p)[0])
1448#define DX3(p,s1,s2,s3) ((DX2((p)+1,s2,s3) << (s1)) ^ (p)[0])
1449#define DMS(v,s) ((lzo_uint) (((v) & (D_MASK >> (s))) << (s)))
1450#define DM(v) DMS(v,0)
1451
1452#if (LZO_HASH == LZO_HASH_GZIP)
1453# define _DINDEX(dv,p) (_DV_A((p),DL_SHIFT))
1454
1455#elif (LZO_HASH == LZO_HASH_GZIP_INCREMENTAL)
1456# define __LZO_HASH_INCREMENTAL
1457# define DVAL_FIRST(dv,p) dv = _DV_A((p),DL_SHIFT)
1458# define DVAL_NEXT(dv,p) dv = (((dv) << DL_SHIFT) ^ p[2])
1459# define _DINDEX(dv,p) (dv)
1460# define DVAL_LOOKAHEAD DL_MIN_LEN
1461
1462#elif (LZO_HASH == LZO_HASH_LZO_INCREMENTAL_A)
1463# define __LZO_HASH_INCREMENTAL
1464# define DVAL_FIRST(dv,p) dv = _DV_A((p),5)
1465# define DVAL_NEXT(dv,p) \
1466 dv ^= (lzo_uint32)(p[-1]) << (2*5); dv = (((dv) << 5) ^ p[2])
1467# define _DINDEX(dv,p) ((0x9f5f * (dv)) >> 5)
1468# define DVAL_LOOKAHEAD DL_MIN_LEN
1469
1470#elif (LZO_HASH == LZO_HASH_LZO_INCREMENTAL_B)
1471# define __LZO_HASH_INCREMENTAL
1472# define DVAL_FIRST(dv,p) dv = _DV_B((p),5)
1473# define DVAL_NEXT(dv,p) \
1474 dv ^= p[-1]; dv = (((dv) >> 5) ^ ((lzo_uint32)(p[2]) << (2*5)))
1475# define _DINDEX(dv,p) ((0x9f5f * (dv)) >> 5)
1476# define DVAL_LOOKAHEAD DL_MIN_LEN
1477
1478#else
1479# error choose a hashing strategy
1480#endif
1481
1482#ifndef DINDEX
1483#define DINDEX(dv,p) ((lzo_uint)((_DINDEX(dv,p)) & DL_MASK) << DD_BITS)
1484#endif
1485#if !defined(DINDEX1) && defined(D_INDEX1)
1486#define DINDEX1 D_INDEX1
1487#endif
1488#if !defined(DINDEX2) && defined(D_INDEX2)
1489#define DINDEX2 D_INDEX2
1490#endif
1491
1492#if !defined(__LZO_HASH_INCREMENTAL)
1493# define DVAL_FIRST(dv,p) ((void) 0)
1494# define DVAL_NEXT(dv,p) ((void) 0)
1495# define DVAL_LOOKAHEAD 0
1496#endif
1497
1498#if !defined(DVAL_ASSERT)
1499#if defined(__LZO_HASH_INCREMENTAL) && !defined(NDEBUG)
1500static void DVAL_ASSERT(lzo_uint32 dv, const lzo_byte *p)
1501{
1502 lzo_uint32 df;
1503 DVAL_FIRST(df,(p));
1504 assert(DINDEX(dv,p) == DINDEX(df,p));
1505}
1506#else
1507# define DVAL_ASSERT(dv,p) ((void) 0)
1508#endif
1509#endif
1510
1511#if defined(LZO_DICT_USE_PTR)
1512# define DENTRY(p,in) (p)
1513# define GINDEX(m_pos,m_off,dict,dindex,in) m_pos = dict[dindex]
1514#else
1515# define DENTRY(p,in) ((lzo_uint) ((p)-(in)))
1516# define GINDEX(m_pos,m_off,dict,dindex,in) m_off = dict[dindex]
1517#endif
1518
1519#if (DD_BITS == 0)
1520
1521# define UPDATE_D(dict,drun,dv,p,in) dict[ DINDEX(dv,p) ] = DENTRY(p,in)
1522# define UPDATE_I(dict,drun,index,p,in) dict[index] = DENTRY(p,in)
1523# define UPDATE_P(ptr,drun,p,in) (ptr)[0] = DENTRY(p,in)
1524
1525#else
1526
1527# define UPDATE_D(dict,drun,dv,p,in) \
1528 dict[ DINDEX(dv,p) + drun++ ] = DENTRY(p,in); drun &= DD_MASK
1529# define UPDATE_I(dict,drun,index,p,in) \
1530 dict[ (index) + drun++ ] = DENTRY(p,in); drun &= DD_MASK
1531# define UPDATE_P(ptr,drun,p,in) \
1532 (ptr) [ drun++ ] = DENTRY(p,in); drun &= DD_MASK
1533
1534#endif
1535
1536#if defined(LZO_DICT_USE_PTR)
1537
1538#define LZO_CHECK_MPOS_DET(m_pos,m_off,in,ip,max_offset) \
1539 (m_pos == NULL || (m_off = (lzo_moff_t) (ip - m_pos)) > max_offset)
1540
1541#define LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,max_offset) \
1542 (BOUNDS_CHECKING_OFF_IN_EXPR( \
1543 (PTR_LT(m_pos,in) || \
1544 (m_off = (lzo_moff_t) PTR_DIFF(ip,m_pos)) <= 0 || \
1545 m_off > max_offset) ))
1546
1547#else
1548
1549#define LZO_CHECK_MPOS_DET(m_pos,m_off,in,ip,max_offset) \
1550 (m_off == 0 || \
1551 ((m_off = (lzo_moff_t) ((ip)-(in)) - m_off) > max_offset) || \
1552 (m_pos = (ip) - (m_off), 0) )
1553
1554#define LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,max_offset) \
1555 ((lzo_moff_t) ((ip)-(in)) <= m_off || \
1556 ((m_off = (lzo_moff_t) ((ip)-(in)) - m_off) > max_offset) || \
1557 (m_pos = (ip) - (m_off), 0) )
1558
1559#endif
1560
1561#if defined(LZO_DETERMINISTIC)
1562# define LZO_CHECK_MPOS LZO_CHECK_MPOS_DET
1563#else
1564# define LZO_CHECK_MPOS LZO_CHECK_MPOS_NON_DET
1565#endif
1566
1567#ifdef __cplusplus
1568}
1569#endif
1570
1571#endif
1572
1573#endif
1574
1575#endif
1576
1577#define DO_COMPRESS lzo1x_1_compress
1578
1579static
1580lzo_uint do_compress ( const lzo_byte *in , lzo_uint in_len,
1581 lzo_byte *out, lzo_uint *out_len,
1582 lzo_voidp wrkmem )
1583{
1584#if 0 && defined(__GNUC__) && defined(__i386__)
1585 register const lzo_byte *ip __asm__("%esi");
1586#else
1587 register const lzo_byte *ip;
1588#endif
1589 lzo_byte *op;
1590 const lzo_byte * const in_end = in + in_len;
1591 const lzo_byte * const ip_end = in + in_len - M2_MAX_LEN - 5;
1592 const lzo_byte *ii;
1593 lzo_dict_p const dict = (lzo_dict_p) wrkmem;
1594
1595 op = out;
1596 ip = in;
1597 ii = ip;
1598
1599 ip += 4;
1600 for (;;)
1601 {
1602#if 0 && defined(__GNUC__) && defined(__i386__)
1603 register const lzo_byte *m_pos __asm__("%edi");
1604#else
1605 register const lzo_byte *m_pos;
1606#endif
1607 lzo_moff_t m_off;
1608 lzo_uint m_len;
1609 lzo_uint dindex;
1610
1611 DINDEX1(dindex,ip);
1612 GINDEX(m_pos,m_off,dict,dindex,in);
1613 if (LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,M4_MAX_OFFSET))
1614 goto literal;
1615#if 1
1616 if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
1617 goto try_match;
1618 DINDEX2(dindex,ip);
1619#endif
1620 GINDEX(m_pos,m_off,dict,dindex,in);
1621 if (LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,M4_MAX_OFFSET))
1622 goto literal;
1623 if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
1624 goto try_match;
1625 goto literal;
1626
1627try_match:
1628#if 1 && defined(LZO_UNALIGNED_OK_2)
1629 if (* (const lzo_ushortp) m_pos != * (const lzo_ushortp) ip)
1630#else
1631 if (m_pos[0] != ip[0] || m_pos[1] != ip[1])
1632#endif
1633 {
1634 }
1635 else
1636 {
1637 if (m_pos[2] == ip[2])
1638 {
1639#if 0
1640 if (m_off <= M2_MAX_OFFSET)
1641 goto match;
1642 if (lit <= 3)
1643 goto match;
1644 if (lit == 3)
1645 {
1646 assert(op - 2 > out); op[-2] |= LZO_BYTE(3);
1647 *op++ = *ii++; *op++ = *ii++; *op++ = *ii++;
1648 goto code_match;
1649 }
1650 if (m_pos[3] == ip[3])
1651#endif
1652 goto match;
1653 }
1654 else
1655 {
1656#if 0
1657#if 0
1658 if (m_off <= M1_MAX_OFFSET && lit > 0 && lit <= 3)
1659#else
1660 if (m_off <= M1_MAX_OFFSET && lit == 3)
1661#endif
1662 {
1663 register lzo_uint t;
1664
1665 t = lit;
1666 assert(op - 2 > out); op[-2] |= LZO_BYTE(t);
1667 do *op++ = *ii++; while (--t > 0);
1668 assert(ii == ip);
1669 m_off -= 1;
1670 *op++ = LZO_BYTE(M1_MARKER | ((m_off & 3) << 2));
1671 *op++ = LZO_BYTE(m_off >> 2);
1672 ip += 2;
1673 goto match_done;
1674 }
1675#endif
1676 }
1677 }
1678
1679literal:
1680 UPDATE_I(dict,0,dindex,ip,in);
1681 ++ip;
1682 if (ip >= ip_end)
1683 break;
1684 continue;
1685
1686match:
1687 UPDATE_I(dict,0,dindex,ip,in);
1688 if (ip - ii > 0)
1689 {
1690 register lzo_uint t = ip - ii;
1691
1692 if (t <= 3)
1693 {
1694 assert(op - 2 > out);
1695 op[-2] |= LZO_BYTE(t);
1696 }
1697 else if (t <= 18)
1698 *op++ = LZO_BYTE(t - 3);
1699 else
1700 {
1701 register lzo_uint tt = t - 18;
1702
1703 *op++ = 0;
1704 while (tt > 255)
1705 {
1706 tt -= 255;
1707 *op++ = 0;
1708 }
1709 assert(tt > 0);
1710 *op++ = LZO_BYTE(tt);
1711 }
1712 do *op++ = *ii++; while (--t > 0);
1713 }
1714
1715 assert(ii == ip);
1716 ip += 3;
1717 if (m_pos[3] != *ip++ || m_pos[4] != *ip++ || m_pos[5] != *ip++ ||
1718 m_pos[6] != *ip++ || m_pos[7] != *ip++ || m_pos[8] != *ip++
1719#ifdef LZO1Y
1720 || m_pos[ 9] != *ip++ || m_pos[10] != *ip++ || m_pos[11] != *ip++
1721 || m_pos[12] != *ip++ || m_pos[13] != *ip++ || m_pos[14] != *ip++
1722#endif
1723 )
1724 {
1725 --ip;
1726 m_len = ip - ii;
1727 assert(m_len >= 3); assert(m_len <= M2_MAX_LEN);
1728
1729 if (m_off <= M2_MAX_OFFSET)
1730 {
1731 m_off -= 1;
1732#if defined(LZO1X)
1733 *op++ = LZO_BYTE(((m_len - 1) << 5) | ((m_off & 7) << 2));
1734 *op++ = LZO_BYTE(m_off >> 3);
1735#elif defined(LZO1Y)
1736 *op++ = LZO_BYTE(((m_len + 1) << 4) | ((m_off & 3) << 2));
1737 *op++ = LZO_BYTE(m_off >> 2);
1738#endif
1739 }
1740 else if (m_off <= M3_MAX_OFFSET)
1741 {
1742 m_off -= 1;
1743 *op++ = LZO_BYTE(M3_MARKER | (m_len - 2));
1744 goto m3_m4_offset;
1745 }
1746 else
1747#if defined(LZO1X)
1748 {
1749 m_off -= 0x4000;
1750 assert(m_off > 0); assert(m_off <= 0x7fff);
1751 *op++ = LZO_BYTE(M4_MARKER |
1752 ((m_off & 0x4000) >> 11) | (m_len - 2));
1753 goto m3_m4_offset;
1754 }
1755#elif defined(LZO1Y)
1756 goto m4_match;
1757#endif
1758 }
1759 else
1760 {
1761 {
1762 const lzo_byte *end = in_end;
1763 const lzo_byte *m = m_pos + M2_MAX_LEN + 1;
1764 while (ip < end && *m == *ip)
1765 m++, ip++;
1766 m_len = (ip - ii);
1767 }
1768 assert(m_len > M2_MAX_LEN);
1769
1770 if (m_off <= M3_MAX_OFFSET)
1771 {
1772 m_off -= 1;
1773 if (m_len <= 33)
1774 *op++ = LZO_BYTE(M3_MARKER | (m_len - 2));
1775 else
1776 {
1777 m_len -= 33;
1778 *op++ = M3_MARKER | 0;
1779 goto m3_m4_len;
1780 }
1781 }
1782 else
1783 {
1784#if defined(LZO1Y)
1785m4_match:
1786#endif
1787 m_off -= 0x4000;
1788 assert(m_off > 0); assert(m_off <= 0x7fff);
1789 if (m_len <= M4_MAX_LEN)
1790 *op++ = LZO_BYTE(M4_MARKER |
1791 ((m_off & 0x4000) >> 11) | (m_len - 2));
1792 else
1793 {
1794 m_len -= M4_MAX_LEN;
1795 *op++ = LZO_BYTE(M4_MARKER | ((m_off & 0x4000) >> 11));
1796m3_m4_len:
1797 while (m_len > 255)
1798 {
1799 m_len -= 255;
1800 *op++ = 0;
1801 }
1802 assert(m_len > 0);
1803 *op++ = LZO_BYTE(m_len);
1804 }
1805 }
1806
1807m3_m4_offset:
1808 *op++ = LZO_BYTE((m_off & 63) << 2);
1809 *op++ = LZO_BYTE(m_off >> 6);
1810 }
1811
1812#if 0
1813match_done:
1814#endif
1815 ii = ip;
1816 if (ip >= ip_end)
1817 break;
1818 }
1819
1820 *out_len = op - out;
1821 return (lzo_uint) (in_end - ii);
1822}
1823
1824LZO_PUBLIC(int)
1825DO_COMPRESS ( const lzo_byte *in , lzo_uint in_len,
1826 lzo_byte *out, lzo_uint *out_len,
1827 lzo_voidp wrkmem )
1828{
1829 lzo_byte *op = out;
1830 lzo_uint t;
1831
1832#if defined(__LZO_QUERY_COMPRESS)
1833 if (__LZO_IS_COMPRESS_QUERY(in,in_len,out,out_len,wrkmem))
1834 return __LZO_QUERY_COMPRESS(in,in_len,out,out_len,wrkmem,D_SIZE,lzo_sizeof(lzo_dict_t));
1835#endif
1836
1837 if (in_len <= M2_MAX_LEN + 5)
1838 t = in_len;
1839 else
1840 {
1841 t = do_compress(in,in_len,op,out_len,wrkmem);
1842 op += *out_len;
1843 }
1844
1845 if (t > 0)
1846 {
1847 const lzo_byte *ii = in + in_len - t;
1848
1849 if (op == out && t <= 238)
1850 *op++ = LZO_BYTE(17 + t);
1851 else if (t <= 3)
1852 op[-2] |= LZO_BYTE(t);
1853 else if (t <= 18)
1854 *op++ = LZO_BYTE(t - 3);
1855 else
1856 {
1857 lzo_uint tt = t - 18;
1858
1859 *op++ = 0;
1860 while (tt > 255)
1861 {
1862 tt -= 255;
1863 *op++ = 0;
1864 }
1865 assert(tt > 0);
1866 *op++ = LZO_BYTE(tt);
1867 }
1868 do *op++ = *ii++; while (--t > 0);
1869 }
1870
1871 *op++ = M4_MARKER | 1;
1872 *op++ = 0;
1873 *op++ = 0;
1874
1875 *out_len = op - out;
1876 return LZO_E_OK;
1877}
1878
1879#undef do_compress
1880#undef DO_COMPRESS
1881#undef LZO_HASH
1882
1883#undef LZO_TEST_DECOMPRESS_OVERRUN
1884#undef LZO_TEST_DECOMPRESS_OVERRUN_INPUT
1885#undef LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT
1886#undef LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND
1887#undef DO_DECOMPRESS
1888#define DO_DECOMPRESS lzo1x_decompress
1889
1890#if defined(LZO_TEST_DECOMPRESS_OVERRUN)
1891# if !defined(LZO_TEST_DECOMPRESS_OVERRUN_INPUT)
1892# define LZO_TEST_DECOMPRESS_OVERRUN_INPUT 2
1893# endif
1894# if !defined(LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT)
1895# define LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT 2
1896# endif
1897# if !defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND)
1898# define LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND
1899# endif
1900#endif
1901
1902#undef TEST_IP
1903#undef TEST_OP
1904#undef TEST_LOOKBEHIND
1905#undef NEED_IP
1906#undef NEED_OP
1907#undef HAVE_TEST_IP
1908#undef HAVE_TEST_OP
1909#undef HAVE_NEED_IP
1910#undef HAVE_NEED_OP
1911#undef HAVE_ANY_IP
1912#undef HAVE_ANY_OP
1913
1914#if defined(LZO_TEST_DECOMPRESS_OVERRUN_INPUT)
1915# if (LZO_TEST_DECOMPRESS_OVERRUN_INPUT >= 1)
1916# define TEST_IP (ip < ip_end)
1917# endif
1918# if (LZO_TEST_DECOMPRESS_OVERRUN_INPUT >= 2)
1919# define NEED_IP(x) \
1920 if ((lzo_uint)(ip_end - ip) < (lzo_uint)(x)) goto input_overrun
1921# endif
1922#endif
1923
1924#if defined(LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT)
1925# if (LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT >= 1)
1926# define TEST_OP (op <= op_end)
1927# endif
1928# if (LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT >= 2)
1929# undef TEST_OP
1930# define NEED_OP(x) \
1931 if ((lzo_uint)(op_end - op) < (lzo_uint)(x)) goto output_overrun
1932# endif
1933#endif
1934
1935#if defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND)
1936# define TEST_LOOKBEHIND(m_pos,out) if (m_pos < out) goto lookbehind_overrun
1937#else
1938# define TEST_LOOKBEHIND(m_pos,op) ((void) 0)
1939#endif
1940
1941#if !defined(LZO_EOF_CODE) && !defined(TEST_IP)
1942# define TEST_IP (ip < ip_end)
1943#endif
1944
1945#if defined(TEST_IP)
1946# define HAVE_TEST_IP
1947#else
1948# define TEST_IP 1
1949#endif
1950#if defined(TEST_OP)
1951# define HAVE_TEST_OP
1952#else
1953# define TEST_OP 1
1954#endif
1955
1956#if defined(NEED_IP)
1957# define HAVE_NEED_IP
1958#else
1959# define NEED_IP(x) ((void) 0)
1960#endif
1961#if defined(NEED_OP)
1962# define HAVE_NEED_OP
1963#else
1964# define NEED_OP(x) ((void) 0)
1965#endif
1966
1967#if defined(HAVE_TEST_IP) || defined(HAVE_NEED_IP)
1968# define HAVE_ANY_IP
1969#endif
1970#if defined(HAVE_TEST_OP) || defined(HAVE_NEED_OP)
1971# define HAVE_ANY_OP
1972#endif
1973
1974#if defined(DO_DECOMPRESS)
1975LZO_PUBLIC(int)
1976DO_DECOMPRESS ( const lzo_byte *in , lzo_uint in_len,
1977 lzo_byte *out, lzo_uint *out_len,
1978 lzo_voidp wrkmem )
1979#endif
1980{
1981 register lzo_byte *op;
1982 register const lzo_byte *ip;
1983 register lzo_uint t;
1984#if defined(COPY_DICT)
1985 lzo_uint m_off;
1986 const lzo_byte *dict_end;
1987#else
1988 register const lzo_byte *m_pos;
1989#endif
1990
1991 const lzo_byte * const ip_end = in + in_len;
1992#if defined(HAVE_ANY_OP)
1993 lzo_byte * const op_end = out + *out_len;
1994#endif
1995#if defined(LZO1Z)
1996 lzo_uint last_m_off = 0;
1997#endif
1998
1999 LZO_UNUSED(wrkmem);
2000
2001#if defined(__LZO_QUERY_DECOMPRESS)
2002 if (__LZO_IS_DECOMPRESS_QUERY(in,in_len,out,out_len,wrkmem))
2003 return __LZO_QUERY_DECOMPRESS(in,in_len,out,out_len,wrkmem,0,0);
2004#endif
2005
2006#if defined(COPY_DICT)
2007 if (dict)
2008 {
2009 if (dict_len > M4_MAX_OFFSET)
2010 {
2011 dict += dict_len - M4_MAX_OFFSET;
2012 dict_len = M4_MAX_OFFSET;
2013 }
2014 dict_end = dict + dict_len;
2015 }
2016 else
2017 {
2018 dict_len = 0;
2019 dict_end = NULL;
2020 }
2021#endif
2022
2023 *out_len = 0;
2024
2025 op = out;
2026 ip = in;
2027
2028 if (*ip > 17)
2029 {
2030 t = *ip++ - 17;
2031 if (t < 4)
2032 goto match_next;
2033 assert(t > 0); NEED_OP(t); NEED_IP(t+1);
2034 do *op++ = *ip++; while (--t > 0);
2035 goto first_literal_run;
2036 }
2037
2038 while (TEST_IP && TEST_OP)
2039 {
2040 t = *ip++;
2041 if (t >= 16)
2042 goto match;
2043 if (t == 0)
2044 {
2045 NEED_IP(1);
2046 while (*ip == 0)
2047 {
2048 t += 255;
2049 ip++;
2050 NEED_IP(1);
2051 }
2052 t += 15 + *ip++;
2053 }
2054 assert(t > 0); NEED_OP(t+3); NEED_IP(t+4);
2055#if defined(LZO_UNALIGNED_OK_4) || defined(LZO_ALIGNED_OK_4)
2056#if !defined(LZO_UNALIGNED_OK_4)
2057 if (PTR_ALIGNED2_4(op,ip))
2058 {
2059#endif
2060 * (lzo_uint32p) op = * (const lzo_uint32p) ip;
2061 op += 4; ip += 4;
2062 if (--t > 0)
2063 {
2064 if (t >= 4)
2065 {
2066 do {
2067 * (lzo_uint32p) op = * (const lzo_uint32p) ip;
2068 op += 4; ip += 4; t -= 4;
2069 } while (t >= 4);
2070 if (t > 0) do *op++ = *ip++; while (--t > 0);
2071 }
2072 else
2073 do *op++ = *ip++; while (--t > 0);
2074 }
2075#if !defined(LZO_UNALIGNED_OK_4)
2076 }
2077 else
2078#endif
2079#endif
2080#if !defined(LZO_UNALIGNED_OK_4)
2081 {
2082 *op++ = *ip++; *op++ = *ip++; *op++ = *ip++;
2083 do *op++ = *ip++; while (--t > 0);
2084 }
2085#endif
2086
2087first_literal_run:
2088
2089 t = *ip++;
2090 if (t >= 16)
2091 goto match;
2092#if defined(COPY_DICT)
2093#if defined(LZO1Z)
2094 m_off = (1 + M2_MAX_OFFSET) + (t << 6) + (*ip++ >> 2);
2095 last_m_off = m_off;
2096#else
2097 m_off = (1 + M2_MAX_OFFSET) + (t >> 2) + (*ip++ << 2);
2098#endif
2099 NEED_OP(3);
2100 t = 3; COPY_DICT(t,m_off)
2101#else
2102#if defined(LZO1Z)
2103 t = (1 + M2_MAX_OFFSET) + (t << 6) + (*ip++ >> 2);
2104 m_pos = op - t;
2105 last_m_off = t;
2106#else
2107 m_pos = op - (1 + M2_MAX_OFFSET);
2108 m_pos -= t >> 2;
2109 m_pos -= *ip++ << 2;
2110#endif
2111 TEST_LOOKBEHIND(m_pos,out); NEED_OP(3);
2112 *op++ = *m_pos++; *op++ = *m_pos++; *op++ = *m_pos;
2113#endif
2114 goto match_done;
2115
2116 while (TEST_IP && TEST_OP)
2117 {
2118match:
2119 if (t >= 64)
2120 {
2121#if defined(COPY_DICT)
2122#if defined(LZO1X)
2123 m_off = 1 + ((t >> 2) & 7) + (*ip++ << 3);
2124 t = (t >> 5) - 1;
2125#elif defined(LZO1Y)
2126 m_off = 1 + ((t >> 2) & 3) + (*ip++ << 2);
2127 t = (t >> 4) - 3;
2128#elif defined(LZO1Z)
2129 m_off = t & 0x1f;
2130 if (m_off >= 0x1c)
2131 m_off = last_m_off;
2132 else
2133 {
2134 m_off = 1 + (m_off << 6) + (*ip++ >> 2);
2135 last_m_off = m_off;
2136 }
2137 t = (t >> 5) - 1;
2138#endif
2139#else
2140#if defined(LZO1X)
2141 m_pos = op - 1;
2142 m_pos -= (t >> 2) & 7;
2143 m_pos -= *ip++ << 3;
2144 t = (t >> 5) - 1;
2145#elif defined(LZO1Y)
2146 m_pos = op - 1;
2147 m_pos -= (t >> 2) & 3;
2148 m_pos -= *ip++ << 2;
2149 t = (t >> 4) - 3;
2150#elif defined(LZO1Z)
2151 {
2152 lzo_uint off = t & 0x1f;
2153 m_pos = op;
2154 if (off >= 0x1c)
2155 {
2156 assert(last_m_off > 0);
2157 m_pos -= last_m_off;
2158 }
2159 else
2160 {
2161 off = 1 + (off << 6) + (*ip++ >> 2);
2162 m_pos -= off;
2163 last_m_off = off;
2164 }
2165 }
2166 t = (t >> 5) - 1;
2167#endif
2168 TEST_LOOKBEHIND(m_pos,out); assert(t > 0); NEED_OP(t+3-1);
2169 goto copy_match;
2170#endif
2171 }
2172 else if (t >= 32)
2173 {
2174 t &= 31;
2175 if (t == 0)
2176 {
2177 NEED_IP(1);
2178 while (*ip == 0)
2179 {
2180 t += 255;
2181 ip++;
2182 NEED_IP(1);
2183 }
2184 t += 31 + *ip++;
2185 }
2186#if defined(COPY_DICT)
2187#if defined(LZO1Z)
2188 m_off = 1 + (ip[0] << 6) + (ip[1] >> 2);
2189 last_m_off = m_off;
2190#else
2191 m_off = 1 + (ip[0] >> 2) + (ip[1] << 6);
2192#endif
2193#else
2194#if defined(LZO1Z)
2195 {
2196 lzo_uint off = 1 + (ip[0] << 6) + (ip[1] >> 2);
2197 m_pos = op - off;
2198 last_m_off = off;
2199 }
2200#elif defined(LZO_UNALIGNED_OK_2) && (LZO_BYTE_ORDER == LZO_LITTLE_ENDIAN)
2201 m_pos = op - 1;
2202 m_pos -= (* (const lzo_ushortp) ip) >> 2;
2203#else
2204 m_pos = op - 1;
2205 m_pos -= (ip[0] >> 2) + (ip[1] << 6);
2206#endif
2207#endif
2208 ip += 2;
2209 }
2210 else if (t >= 16)
2211 {
2212#if defined(COPY_DICT)
2213 m_off = (t & 8) << 11;
2214#else
2215 m_pos = op;
2216 m_pos -= (t & 8) << 11;
2217#endif
2218 t &= 7;
2219 if (t == 0)
2220 {
2221 NEED_IP(1);
2222 while (*ip == 0)
2223 {
2224 t += 255;
2225 ip++;
2226 NEED_IP(1);
2227 }
2228 t += 7 + *ip++;
2229 }
2230#if defined(COPY_DICT)
2231#if defined(LZO1Z)
2232 m_off += (ip[0] << 6) + (ip[1] >> 2);
2233#else
2234 m_off += (ip[0] >> 2) + (ip[1] << 6);
2235#endif
2236 ip += 2;
2237 if (m_off == 0)
2238 goto eof_found;
2239 m_off += 0x4000;
2240#if defined(LZO1Z)
2241 last_m_off = m_off;
2242#endif
2243#else
2244#if defined(LZO1Z)
2245 m_pos -= (ip[0] << 6) + (ip[1] >> 2);
2246#elif defined(LZO_UNALIGNED_OK_2) && (LZO_BYTE_ORDER == LZO_LITTLE_ENDIAN)
2247 m_pos -= (* (const lzo_ushortp) ip) >> 2;
2248#else
2249 m_pos -= (ip[0] >> 2) + (ip[1] << 6);
2250#endif
2251 ip += 2;
2252 if (m_pos == op)
2253 goto eof_found;
2254 m_pos -= 0x4000;
2255#if defined(LZO1Z)
2256 last_m_off = op - m_pos;
2257#endif
2258#endif
2259 }
2260 else
2261 {
2262#if defined(COPY_DICT)
2263#if defined(LZO1Z)
2264 m_off = 1 + (t << 6) + (*ip++ >> 2);
2265 last_m_off = m_off;
2266#else
2267 m_off = 1 + (t >> 2) + (*ip++ << 2);
2268#endif
2269 NEED_OP(2);
2270 t = 2; COPY_DICT(t,m_off)
2271#else
2272#if defined(LZO1Z)
2273 t = 1 + (t << 6) + (*ip++ >> 2);
2274 m_pos = op - t;
2275 last_m_off = t;
2276#else
2277 m_pos = op - 1;
2278 m_pos -= t >> 2;
2279 m_pos -= *ip++ << 2;
2280#endif
2281 TEST_LOOKBEHIND(m_pos,out); NEED_OP(2);
2282 *op++ = *m_pos++; *op++ = *m_pos;
2283#endif
2284 goto match_done;
2285 }
2286
2287#if defined(COPY_DICT)
2288
2289 NEED_OP(t+3-1);
2290 t += 3-1; COPY_DICT(t,m_off)
2291
2292#else
2293
2294 TEST_LOOKBEHIND(m_pos,out); assert(t > 0); NEED_OP(t+3-1);
2295#if defined(LZO_UNALIGNED_OK_4) || defined(LZO_ALIGNED_OK_4)
2296#if !defined(LZO_UNALIGNED_OK_4)
2297 if (t >= 2 * 4 - (3 - 1) && PTR_ALIGNED2_4(op,m_pos))
2298 {
2299 assert((op - m_pos) >= 4);
2300#else
2301 if (t >= 2 * 4 - (3 - 1) && (op - m_pos) >= 4)
2302 {
2303#endif
2304 * (lzo_uint32p) op = * (const lzo_uint32p) m_pos;
2305 op += 4; m_pos += 4; t -= 4 - (3 - 1);
2306 do {
2307 * (lzo_uint32p) op = * (const lzo_uint32p) m_pos;
2308 op += 4; m_pos += 4; t -= 4;
2309 } while (t >= 4);
2310 if (t > 0) do *op++ = *m_pos++; while (--t > 0);
2311 }
2312 else
2313#endif
2314 {
2315copy_match:
2316 *op++ = *m_pos++; *op++ = *m_pos++;
2317 do *op++ = *m_pos++; while (--t > 0);
2318 }
2319
2320#endif
2321
2322match_done:
2323#if defined(LZO1Z)
2324 t = ip[-1] & 3;
2325#else
2326 t = ip[-2] & 3;
2327#endif
2328 if (t == 0)
2329 break;
2330
2331match_next:
2332 assert(t > 0); NEED_OP(t); NEED_IP(t+1);
2333 do *op++ = *ip++; while (--t > 0);
2334 t = *ip++;
2335 }
2336 }
2337
2338#if defined(HAVE_TEST_IP) || defined(HAVE_TEST_OP)
2339 *out_len = op - out;
2340 return LZO_E_EOF_NOT_FOUND;
2341#endif
2342
2343eof_found:
2344 assert(t == 1);
2345 *out_len = op - out;
2346 return (ip == ip_end ? LZO_E_OK :
2347 (ip < ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN));
2348
2349#if defined(HAVE_NEED_IP)
2350input_overrun:
2351 *out_len = op - out;
2352 return LZO_E_INPUT_OVERRUN;
2353#endif
2354
2355#if defined(HAVE_NEED_OP)
2356output_overrun:
2357 *out_len = op - out;
2358 return LZO_E_OUTPUT_OVERRUN;
2359#endif
2360
2361#if defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND)
2362lookbehind_overrun:
2363 *out_len = op - out;
2364 return LZO_E_LOOKBEHIND_OVERRUN;
2365#endif
2366}
2367
2368#define LZO_TEST_DECOMPRESS_OVERRUN
2369#undef DO_DECOMPRESS
2370#define DO_DECOMPRESS lzo1x_decompress_safe
2371
2372#if defined(LZO_TEST_DECOMPRESS_OVERRUN)
2373# if !defined(LZO_TEST_DECOMPRESS_OVERRUN_INPUT)
2374# define LZO_TEST_DECOMPRESS_OVERRUN_INPUT 2
2375# endif
2376# if !defined(LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT)
2377# define LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT 2
2378# endif
2379# if !defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND)
2380# define LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND
2381# endif
2382#endif
2383
2384#undef TEST_IP
2385#undef TEST_OP
2386#undef TEST_LOOKBEHIND
2387#undef NEED_IP
2388#undef NEED_OP
2389#undef HAVE_TEST_IP
2390#undef HAVE_TEST_OP
2391#undef HAVE_NEED_IP
2392#undef HAVE_NEED_OP
2393#undef HAVE_ANY_IP
2394#undef HAVE_ANY_OP
2395
2396#if defined(LZO_TEST_DECOMPRESS_OVERRUN_INPUT)
2397# if (LZO_TEST_DECOMPRESS_OVERRUN_INPUT >= 1)
2398# define TEST_IP (ip < ip_end)
2399# endif
2400# if (LZO_TEST_DECOMPRESS_OVERRUN_INPUT >= 2)
2401# define NEED_IP(x, y) \
2402 if ( ((y > 0) && (x > (LZO_UINT_MAX - y))) || ((lzo_uint)(ip_end - ip) < (lzo_uint)((x)+(y))) ) goto input_overrun
2403# endif
2404#endif
2405
2406#if defined(LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT)
2407# if (LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT >= 1)
2408# define TEST_OP (op <= op_end)
2409# endif
2410# if (LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT >= 2)
2411# undef TEST_OP
2412# define NEED_OP(x,y) \
2413 if ( ((y > 0) && (x > (LZO_UINT_MAX - y))) || ((lzo_uint)(op_end - op) < (lzo_uint)((x)+(y))) ) goto output_overrun
2414# endif
2415#endif
2416
2417#if defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND)
2418# define TEST_LOOKBEHIND(m_pos,out) if (m_pos < out) goto lookbehind_overrun
2419#else
2420# define TEST_LOOKBEHIND(m_pos,op) ((void) 0)
2421#endif
2422
2423#if !defined(LZO_EOF_CODE) && !defined(TEST_IP)
2424# define TEST_IP (ip < ip_end)
2425#endif
2426
2427#if defined(TEST_IP)
2428# define HAVE_TEST_IP
2429#else
2430# define TEST_IP 1
2431#endif
2432#if defined(TEST_OP)
2433# define HAVE_TEST_OP
2434#else
2435# define TEST_OP 1
2436#endif
2437
2438#if defined(NEED_IP)
2439# define HAVE_NEED_IP
2440#else
2441 /* # define NEED_IP(x) ((void) 0) */
2442#error "no need_ip"
2443#endif
2444#if defined(NEED_OP)
2445# define HAVE_NEED_OP
2446#else
2447 /* # define NEED_OP(x) ((void) 0) */
2448#error "no need_op"
2449#endif
2450
2451#if defined(HAVE_TEST_IP) || defined(HAVE_NEED_IP)
2452# define HAVE_ANY_IP
2453#endif
2454#if defined(HAVE_TEST_OP) || defined(HAVE_NEED_OP)
2455# define HAVE_ANY_OP
2456#endif
2457
2458#if defined(DO_DECOMPRESS)
2459LZO_PUBLIC(int)
2460DO_DECOMPRESS ( const lzo_byte *in , lzo_uint in_len,
2461 lzo_byte *out, lzo_uint *out_len,
2462 lzo_voidp wrkmem )
2463#endif
2464{
2465 register lzo_byte *op;
2466 register const lzo_byte *ip;
2467 register lzo_uint t;
2468#if defined(COPY_DICT)
2469 lzo_uint m_off;
2470 const lzo_byte *dict_end;
2471#else
2472 register const lzo_byte *m_pos;
2473#endif
2474
2475 const lzo_byte * const ip_end = in + in_len;
2476#if defined(HAVE_ANY_OP)
2477 lzo_byte * const op_end = out + *out_len;
2478#endif
2479#if defined(LZO1Z)
2480 lzo_uint last_m_off = 0;
2481#endif
2482
2483 LZO_UNUSED(wrkmem);
2484
2485#if defined(__LZO_QUERY_DECOMPRESS)
2486 if (__LZO_IS_DECOMPRESS_QUERY(in,in_len,out,out_len,wrkmem))
2487 return __LZO_QUERY_DECOMPRESS(in,in_len,out,out_len,wrkmem,0,0);
2488#endif
2489
2490#if defined(COPY_DICT)
2491 if (dict)
2492 {
2493 if (dict_len > M4_MAX_OFFSET)
2494 {
2495 dict += dict_len - M4_MAX_OFFSET;
2496 dict_len = M4_MAX_OFFSET;
2497 }
2498 dict_end = dict + dict_len;
2499 }
2500 else
2501 {
2502 dict_len = 0;
2503 dict_end = NULL;
2504 }
2505#endif
2506
2507 *out_len = 0;
2508
2509 op = out;
2510 ip = in;
2511
2512 if (*ip > 17)
2513 {
2514 t = *ip++ - 17;
2515 if (t < 4)
2516 goto match_next;
2517 assert(t > 0); NEED_OP(t, 0); NEED_IP(t, 1);
2518 do *op++ = *ip++; while (--t > 0);
2519 goto first_literal_run;
2520 }
2521
2522 while (TEST_IP && TEST_OP)
2523 {
2524 t = *ip++;
2525 if (t >= 16)
2526 goto match;
2527 if (t == 0)
2528 {
2529 NEED_IP(1, 0);
2530 while (*ip == 0)
2531 {
2532 t += 255;
2533 ip++;
2534 NEED_IP(1, 0);
2535 }
2536 t += 15 + *ip++;
2537 }
2538 assert(t > 0); NEED_OP(t,3); NEED_IP(t,4);
2539#if defined(LZO_UNALIGNED_OK_4) || defined(LZO_ALIGNED_OK_4)
2540#if !defined(LZO_UNALIGNED_OK_4)
2541 if (PTR_ALIGNED2_4(op,ip))
2542 {
2543#endif
2544 * (lzo_uint32p) op = * (const lzo_uint32p) ip;
2545 op += 4; ip += 4;
2546 if (--t > 0)
2547 {
2548 if (t >= 4)
2549 {
2550 do {
2551 * (lzo_uint32p) op = * (const lzo_uint32p) ip;
2552 op += 4; ip += 4; t -= 4;
2553 } while (t >= 4);
2554 if (t > 0) do *op++ = *ip++; while (--t > 0);
2555 }
2556 else
2557 do *op++ = *ip++; while (--t > 0);
2558 }
2559#if !defined(LZO_UNALIGNED_OK_4)
2560 }
2561 else
2562#endif
2563#endif
2564#if !defined(LZO_UNALIGNED_OK_4)
2565 {
2566 *op++ = *ip++; *op++ = *ip++; *op++ = *ip++;
2567 do *op++ = *ip++; while (--t > 0);
2568 }
2569#endif
2570
2571first_literal_run:
2572
2573 t = *ip++;
2574 if (t >= 16)
2575 goto match;
2576#if defined(COPY_DICT)
2577#if defined(LZO1Z)
2578 m_off = (1 + M2_MAX_OFFSET) + (t << 6) + (*ip++ >> 2);
2579 last_m_off = m_off;
2580#else
2581 m_off = (1 + M2_MAX_OFFSET) + (t >> 2) + (*ip++ << 2);
2582#endif
2583 NEED_OP(3);
2584 t = 3; COPY_DICT(t,m_off)
2585#else
2586#if defined(LZO1Z)
2587 t = (1 + M2_MAX_OFFSET) + (t << 6) + (*ip++ >> 2);
2588 m_pos = op - t;
2589 last_m_off = t;
2590#else
2591 m_pos = op - (1 + M2_MAX_OFFSET);
2592 m_pos -= t >> 2;
2593 m_pos -= *ip++ << 2;
2594#endif
2595 TEST_LOOKBEHIND(m_pos,out); NEED_OP(3,0);
2596 *op++ = *m_pos++; *op++ = *m_pos++; *op++ = *m_pos;
2597#endif
2598 goto match_done;
2599
2600 while (TEST_IP && TEST_OP)
2601 {
2602match:
2603 if (t >= 64)
2604 {
2605#if defined(COPY_DICT)
2606#if defined(LZO1X)
2607 m_off = 1 + ((t >> 2) & 7) + (*ip++ << 3);
2608 t = (t >> 5) - 1;
2609#elif defined(LZO1Y)
2610 m_off = 1 + ((t >> 2) & 3) + (*ip++ << 2);
2611 t = (t >> 4) - 3;
2612#elif defined(LZO1Z)
2613 m_off = t & 0x1f;
2614 if (m_off >= 0x1c)
2615 m_off = last_m_off;
2616 else
2617 {
2618 m_off = 1 + (m_off << 6) + (*ip++ >> 2);
2619 last_m_off = m_off;
2620 }
2621 t = (t >> 5) - 1;
2622#endif
2623#else
2624#if defined(LZO1X)
2625 m_pos = op - 1;
2626 m_pos -= (t >> 2) & 7;
2627 m_pos -= *ip++ << 3;
2628 t = (t >> 5) - 1;
2629#elif defined(LZO1Y)
2630 m_pos = op - 1;
2631 m_pos -= (t >> 2) & 3;
2632 m_pos -= *ip++ << 2;
2633 t = (t >> 4) - 3;
2634#elif defined(LZO1Z)
2635 {
2636 lzo_uint off = t & 0x1f;
2637 m_pos = op;
2638 if (off >= 0x1c)
2639 {
2640 assert(last_m_off > 0);
2641 m_pos -= last_m_off;
2642 }
2643 else
2644 {
2645 off = 1 + (off << 6) + (*ip++ >> 2);
2646 m_pos -= off;
2647 last_m_off = off;
2648 }
2649 }
2650 t = (t >> 5) - 1;
2651#endif
2652 TEST_LOOKBEHIND(m_pos,out); assert(t > 0); NEED_OP(t,(3-1));
2653 goto copy_match;
2654#endif
2655 }
2656 else if (t >= 32)
2657 {
2658 t &= 31;
2659 if (t == 0)
2660 {
2661 NEED_IP(1,0);
2662 while (*ip == 0)
2663 {
2664 t += 255;
2665 ip++;
2666 NEED_IP(1,0);
2667 }
2668 t += 31 + *ip++;
2669 }
2670#if defined(COPY_DICT)
2671#if defined(LZO1Z)
2672 m_off = 1 + (ip[0] << 6) + (ip[1] >> 2);
2673 last_m_off = m_off;
2674#else
2675 m_off = 1 + (ip[0] >> 2) + (ip[1] << 6);
2676#endif
2677#else
2678#if defined(LZO1Z)
2679 {
2680 lzo_uint off = 1 + (ip[0] << 6) + (ip[1] >> 2);
2681 m_pos = op - off;
2682 last_m_off = off;
2683 }
2684#elif defined(LZO_UNALIGNED_OK_2) && (LZO_BYTE_ORDER == LZO_LITTLE_ENDIAN)
2685 m_pos = op - 1;
2686 m_pos -= (* (const lzo_ushortp) ip) >> 2;
2687#else
2688 m_pos = op - 1;
2689 m_pos -= (ip[0] >> 2) + (ip[1] << 6);
2690#endif
2691#endif
2692 ip += 2;
2693 }
2694 else if (t >= 16)
2695 {
2696#if defined(COPY_DICT)
2697 m_off = (t & 8) << 11;
2698#else
2699 m_pos = op;
2700 m_pos -= (t & 8) << 11;
2701#endif
2702 t &= 7;
2703 if (t == 0)
2704 {
2705 NEED_IP(1,0);
2706 while (*ip == 0)
2707 {
2708 t += 255;
2709 ip++;
2710 NEED_IP(1,0);
2711 }
2712 t += 7 + *ip++;
2713 }
2714#if defined(COPY_DICT)
2715#if defined(LZO1Z)
2716 m_off += (ip[0] << 6) + (ip[1] >> 2);
2717#else
2718 m_off += (ip[0] >> 2) + (ip[1] << 6);
2719#endif
2720 ip += 2;
2721 if (m_off == 0)
2722 goto eof_found;
2723 m_off += 0x4000;
2724#if defined(LZO1Z)
2725 last_m_off = m_off;
2726#endif
2727#else
2728#if defined(LZO1Z)
2729 m_pos -= (ip[0] << 6) + (ip[1] >> 2);
2730#elif defined(LZO_UNALIGNED_OK_2) && (LZO_BYTE_ORDER == LZO_LITTLE_ENDIAN)
2731 m_pos -= (* (const lzo_ushortp) ip) >> 2;
2732#else
2733 m_pos -= (ip[0] >> 2) + (ip[1] << 6);
2734#endif
2735 ip += 2;
2736 if (m_pos == op)
2737 goto eof_found;
2738 m_pos -= 0x4000;
2739#if defined(LZO1Z)
2740 last_m_off = op - m_pos;
2741#endif
2742#endif
2743 }
2744 else
2745 {
2746#if defined(COPY_DICT)
2747#if defined(LZO1Z)
2748 m_off = 1 + (t << 6) + (*ip++ >> 2);
2749 last_m_off = m_off;
2750#else
2751 m_off = 1 + (t >> 2) + (*ip++ << 2);
2752#endif
2753 NEED_OP(2,0);
2754 t = 2; COPY_DICT(t,m_off)
2755#else
2756#if defined(LZO1Z)
2757 t = 1 + (t << 6) + (*ip++ >> 2);
2758 m_pos = op - t;
2759 last_m_off = t;
2760#else
2761 m_pos = op - 1;
2762 m_pos -= t >> 2;
2763 m_pos -= *ip++ << 2;
2764#endif
2765 TEST_LOOKBEHIND(m_pos,out); NEED_OP(2,0);
2766 *op++ = *m_pos++; *op++ = *m_pos;
2767#endif
2768 goto match_done;
2769 }
2770
2771#if defined(COPY_DICT)
2772
2773 NEED_OP(t,(3-1));
2774 t += 3-1; COPY_DICT(t,m_off)
2775
2776#else
2777
2778 TEST_LOOKBEHIND(m_pos,out); assert(t > 0); NEED_OP(t,(3-1));
2779#if defined(LZO_UNALIGNED_OK_4) || defined(LZO_ALIGNED_OK_4)
2780#if !defined(LZO_UNALIGNED_OK_4)
2781 if (t >= 2 * 4 - (3 - 1) && PTR_ALIGNED2_4(op,m_pos))
2782 {
2783 assert((op - m_pos) >= 4);
2784#else
2785 if (t >= 2 * 4 - (3 - 1) && (op - m_pos) >= 4)
2786 {
2787#endif
2788 * (lzo_uint32p) op = * (const lzo_uint32p) m_pos;
2789 op += 4; m_pos += 4; t -= 4 - (3 - 1);
2790 do {
2791 * (lzo_uint32p) op = * (const lzo_uint32p) m_pos;
2792 op += 4; m_pos += 4; t -= 4;
2793 } while (t >= 4);
2794 if (t > 0) do *op++ = *m_pos++; while (--t > 0);
2795 }
2796 else
2797#endif
2798 {
2799copy_match:
2800 *op++ = *m_pos++; *op++ = *m_pos++;
2801 do *op++ = *m_pos++; while (--t > 0);
2802 }
2803
2804#endif
2805
2806match_done:
2807#if defined(LZO1Z)
2808 t = ip[-1] & 3;
2809#else
2810 t = ip[-2] & 3;
2811#endif
2812 if (t == 0)
2813 break;
2814
2815match_next:
2816 assert(t > 0); NEED_OP(t,0); NEED_IP(t,1);
2817 do *op++ = *ip++; while (--t > 0);
2818 t = *ip++;
2819 }
2820 }
2821
2822#if defined(HAVE_TEST_IP) || defined(HAVE_TEST_OP)
2823 *out_len = op - out;
2824 return LZO_E_EOF_NOT_FOUND;
2825#endif
2826
2827eof_found:
2828 assert(t == 1);
2829 *out_len = op - out;
2830 return (ip == ip_end ? LZO_E_OK :
2831 (ip < ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN));
2832
2833#if defined(HAVE_NEED_IP)
2834input_overrun:
2835 *out_len = op - out;
2836 return LZO_E_INPUT_OVERRUN;
2837#endif
2838
2839#if defined(HAVE_NEED_OP)
2840output_overrun:
2841 *out_len = op - out;
2842 return LZO_E_OUTPUT_OVERRUN;
2843#endif
2844
2845#if defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND)
2846lookbehind_overrun:
2847 *out_len = op - out;
2848 return LZO_E_LOOKBEHIND_OVERRUN;
2849#endif
2850}
2851
2852/***** End of minilzo.c *****/
2853
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