/* $Id$ */ /** * @file minilzo.cpp -- mini subset of the LZO real-time data compression library * * This file is part of the LZO real-time data compression library. * * 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., * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Markus F.X.J. Oberhumer * * http://www.oberhumer.com/opensource/lzo/ * * NOTE: * the full LZO package can be found at * http://www.oberhumer.com/opensource/lzo/ */ #define LZO_DISABLE_CHECKS #define LZO1X #define __LZO_IN_MINILZO #define LZO_BUILD #ifdef MINILZO_HAVE_CONFIG_H # include #endif #undef LZO_HAVE_CONFIG_H #include "minilzo.h" #if !defined(MINILZO_VERSION) || (MINILZO_VERSION != 0x1080) # error "version mismatch in miniLZO source files" #endif #ifdef MINILZO_HAVE_CONFIG_H # define LZO_HAVE_CONFIG_H #endif #if !defined(LZO_NO_SYS_TYPES_H) && !defined(WINCE) # include #endif #include #ifndef __LZO_CONF_H #define __LZO_CONF_H #if defined(__BOUNDS_CHECKING_ON) # include #else # define BOUNDS_CHECKING_OFF_DURING(stmt) stmt # define BOUNDS_CHECKING_OFF_IN_EXPR(expr) (expr) #endif #if !defined(LZO_HAVE_CONFIG_H) # include # include # if !defined(NO_STDLIB_H) # include # endif # define HAVE_MEMCMP # define HAVE_MEMCPY # define HAVE_MEMMOVE # define HAVE_MEMSET #else # include # if defined(HAVE_STDDEF_H) # include # endif # if defined(STDC_HEADERS) # include # include # endif #endif #if defined(__LZO_DOS16) || defined(__LZO_WIN16) # define HAVE_MALLOC_H # define HAVE_HALLOC #endif #undef NDEBUG #if !defined(LZO_DEBUG) # define NDEBUG #endif #if defined(LZO_DEBUG) || !defined(NDEBUG) # if !defined(NO_STDIO_H) # include # endif #endif #include #if !defined(LZO_COMPILE_TIME_ASSERT) # define LZO_COMPILE_TIME_ASSERT(expr) \ { typedef int __lzo_compile_time_assert_fail[1 - 2 * !(expr)]; } #endif #if !defined(LZO_UNUSED) # if 1 # define LZO_UNUSED(var) ((void)&var) # elif 0 # define LZO_UNUSED(var) { typedef int __lzo_unused[sizeof(var) ? 2 : 1]; } # else # define LZO_UNUSED(parm) (parm = parm) # endif #endif #if !defined(__inline__) && !defined(__GNUC__) # if defined(__cplusplus) # define __inline__ inline # else # define __inline__ # endif #endif #if defined(NO_MEMCMP) # undef HAVE_MEMCMP #endif #if 0 # define LZO_BYTE(x) ((unsigned char) (x)) #else # define LZO_BYTE(x) ((unsigned char) ((x) & 0xff)) #endif #define LZO_MAX(a,b) ((a) >= (b) ? (a) : (b)) #define LZO_MIN(a,b) ((a) <= (b) ? (a) : (b)) #define LZO_MAX3(a,b,c) ((a) >= (b) ? LZO_MAX(a,c) : LZO_MAX(b,c)) #define LZO_MIN3(a,b,c) ((a) <= (b) ? LZO_MIN(a,c) : LZO_MIN(b,c)) #define lzo_sizeof(type) ((lzo_uint) (sizeof(type))) #define LZO_HIGH(array) ((lzo_uint) (sizeof(array)/sizeof(*(array)))) #define LZO_SIZE(bits) (1u << (bits)) #define LZO_MASK(bits) (LZO_SIZE(bits) - 1) #define LZO_LSIZE(bits) (1ul << (bits)) #define LZO_LMASK(bits) (LZO_LSIZE(bits) - 1) #define LZO_USIZE(bits) ((lzo_uint) 1 << (bits)) #define LZO_UMASK(bits) (LZO_USIZE(bits) - 1) #define LZO_STYPE_MAX(b) (((1l << (8*(b)-2)) - 1l) + (1l << (8*(b)-2))) #define LZO_UTYPE_MAX(b) (((1ul << (8*(b)-1)) - 1ul) + (1ul << (8*(b)-1))) #if !defined(SIZEOF_UNSIGNED) # if (UINT_MAX == 0xffff) # define SIZEOF_UNSIGNED 2 # elif (UINT_MAX == LZO_0xffffffffL) # define SIZEOF_UNSIGNED 4 # elif (UINT_MAX >= LZO_0xffffffffL) # define SIZEOF_UNSIGNED 8 # else # error "SIZEOF_UNSIGNED" # endif #endif #if !defined(SIZEOF_UNSIGNED_LONG) # if (ULONG_MAX == LZO_0xffffffffL) # define SIZEOF_UNSIGNED_LONG 4 # elif (ULONG_MAX >= LZO_0xffffffffL) # define SIZEOF_UNSIGNED_LONG 8 # else # error "SIZEOF_UNSIGNED_LONG" # endif #endif #if !defined(SIZEOF_SIZE_T) # define SIZEOF_SIZE_T SIZEOF_UNSIGNED #endif #if !defined(SIZE_T_MAX) # define SIZE_T_MAX LZO_UTYPE_MAX(SIZEOF_SIZE_T) #endif #if 1 && defined(__LZO_i386) && (UINT_MAX == LZO_0xffffffffL) # if !defined(LZO_UNALIGNED_OK_2) && (USHRT_MAX == 0xffff) # define LZO_UNALIGNED_OK_2 # endif # if !defined(LZO_UNALIGNED_OK_4) && (LZO_UINT32_MAX == LZO_0xffffffffL) # define LZO_UNALIGNED_OK_4 # endif #endif #if defined(LZO_UNALIGNED_OK_2) || defined(LZO_UNALIGNED_OK_4) # if !defined(LZO_UNALIGNED_OK) # define LZO_UNALIGNED_OK # endif #endif #if defined(__LZO_NO_UNALIGNED) # undef LZO_UNALIGNED_OK # undef LZO_UNALIGNED_OK_2 # undef LZO_UNALIGNED_OK_4 #endif #if defined(LZO_UNALIGNED_OK_2) && (USHRT_MAX != 0xffff) # error "LZO_UNALIGNED_OK_2 must not be defined on this system" #endif #if defined(LZO_UNALIGNED_OK_4) && (LZO_UINT32_MAX != LZO_0xffffffffL) # error "LZO_UNALIGNED_OK_4 must not be defined on this system" #endif #if defined(__LZO_NO_ALIGNED) # undef LZO_ALIGNED_OK_4 #endif #if defined(LZO_ALIGNED_OK_4) && (LZO_UINT32_MAX != LZO_0xffffffffL) # error "LZO_ALIGNED_OK_4 must not be defined on this system" #endif #define LZO_LITTLE_ENDIAN 1234 #define LZO_BIG_ENDIAN 4321 #define LZO_PDP_ENDIAN 3412 #if !defined(LZO_BYTE_ORDER) # if defined(MFX_BYTE_ORDER) # define LZO_BYTE_ORDER MFX_BYTE_ORDER # elif defined(__LZO_i386) # define LZO_BYTE_ORDER LZO_LITTLE_ENDIAN # elif defined(BYTE_ORDER) # define LZO_BYTE_ORDER BYTE_ORDER # elif defined(__BYTE_ORDER) # define LZO_BYTE_ORDER __BYTE_ORDER # endif #endif #if defined(LZO_BYTE_ORDER) # if (LZO_BYTE_ORDER != LZO_LITTLE_ENDIAN) && \ (LZO_BYTE_ORDER != LZO_BIG_ENDIAN) # error "invalid LZO_BYTE_ORDER" # endif #endif #if defined(LZO_UNALIGNED_OK) && !defined(LZO_BYTE_ORDER) # error "LZO_BYTE_ORDER is not defined" #endif #define LZO_OPTIMIZE_GNUC_i386_IS_BUGGY #if defined(NDEBUG) && !defined(LZO_DEBUG) && !defined(__LZO_CHECKER) # if defined(__GNUC__) && defined(__i386__) # if !defined(LZO_OPTIMIZE_GNUC_i386_IS_BUGGY) # define LZO_OPTIMIZE_GNUC_i386 # endif # endif #endif __LZO_EXTERN_C int __lzo_init_done; __LZO_EXTERN_C const lzo_byte __lzo_copyright[]; LZO_EXTERN(const lzo_byte *) lzo_copyright(); __LZO_EXTERN_C const lzo_uint32 _lzo_crc32_table[256]; #define _LZO_STRINGIZE(x) #x #define _LZO_MEXPAND(x) _LZO_STRINGIZE(x) #define _LZO_CONCAT2(a,b) a ## b #define _LZO_CONCAT3(a,b,c) a ## b ## c #define _LZO_CONCAT4(a,b,c,d) a ## b ## c ## d #define _LZO_CONCAT5(a,b,c,d,e) a ## b ## c ## d ## e #define _LZO_ECONCAT2(a,b) _LZO_CONCAT2(a,b) #define _LZO_ECONCAT3(a,b,c) _LZO_CONCAT3(a,b,c) #define _LZO_ECONCAT4(a,b,c,d) _LZO_CONCAT4(a,b,c,d) #define _LZO_ECONCAT5(a,b,c,d,e) _LZO_CONCAT5(a,b,c,d,e) #ifndef __LZO_PTR_H #define __LZO_PTR_H #ifdef __cplusplus extern "C" { #endif #if defined(__LZO_DOS16) || defined(__LZO_WIN16) # include # if 1 && defined(__WATCOMC__) # include __LZO_EXTERN_C unsigned char _HShift; # define __LZO_HShift _HShift # elif 1 && defined(_MSC_VER) __LZO_EXTERN_C unsigned short __near _AHSHIFT; # define __LZO_HShift ((unsigned) &_AHSHIFT) # elif defined(__LZO_WIN16) # define __LZO_HShift 3 # else # define __LZO_HShift 12 # endif # if !defined(_FP_SEG) && defined(FP_SEG) # define _FP_SEG FP_SEG # endif # if !defined(_FP_OFF) && defined(FP_OFF) # define _FP_OFF FP_OFF # endif #endif #if !defined(lzo_ptrdiff_t) # if (UINT_MAX >= LZO_0xffffffffL) typedef ptrdiff_t lzo_ptrdiff_t; # else typedef long lzo_ptrdiff_t; # endif #endif #if !defined(__LZO_HAVE_PTR_T) # if defined(lzo_ptr_t) # define __LZO_HAVE_PTR_T # endif #endif #if !defined(__LZO_HAVE_PTR_T) # if defined(_WIN64) typedef unsigned __int64 lzo_ptr_t; typedef signed __int64 lzo_sptr_r; # define __LZO_HAVE_PTR_T # endif #endif #if !defined(__LZO_HAVE_PTR_T) # if defined(SIZEOF_CHAR_P) && defined(SIZEOF_UNSIGNED_LONG) # if (SIZEOF_CHAR_P == SIZEOF_UNSIGNED_LONG) typedef unsigned long lzo_ptr_t; typedef long lzo_sptr_t; # define __LZO_HAVE_PTR_T # endif # endif #endif #if !defined(__LZO_HAVE_PTR_T) # if defined(SIZEOF_CHAR_P) && defined(SIZEOF_UNSIGNED) # if (SIZEOF_CHAR_P == SIZEOF_UNSIGNED) typedef unsigned int lzo_ptr_t; typedef int lzo_sptr_t; # define __LZO_HAVE_PTR_T # endif # endif #endif #if !defined(__LZO_HAVE_PTR_T) # if defined(SIZEOF_CHAR_P) && defined(SIZEOF_UNSIGNED_SHORT) # if (SIZEOF_CHAR_P == SIZEOF_UNSIGNED_SHORT) typedef unsigned short lzo_ptr_t; typedef short lzo_sptr_t; # define __LZO_HAVE_PTR_T # endif # endif #endif #if !defined(__LZO_HAVE_PTR_T) # if defined(LZO_HAVE_CONFIG_H) || defined(SIZEOF_CHAR_P) # error "no suitable type for lzo_ptr_t" # else typedef unsigned long lzo_ptr_t; typedef long lzo_sptr_t; # define __LZO_HAVE_PTR_T # endif #endif #if defined(__LZO_DOS16) || defined(__LZO_WIN16) #define PTR(a) ((lzo_bytep) (a)) #define PTR_ALIGNED_4(a) ((_FP_OFF(a) & 3) == 0) #define PTR_ALIGNED2_4(a,b) (((_FP_OFF(a) | _FP_OFF(b)) & 3) == 0) #else #define PTR(a) ((lzo_ptr_t) (a)) #define PTR_LINEAR(a) PTR(a) #define PTR_ALIGNED_4(a) ((PTR_LINEAR(a) & 3) == 0) #define PTR_ALIGNED_8(a) ((PTR_LINEAR(a) & 7) == 0) #define PTR_ALIGNED2_4(a,b) (((PTR_LINEAR(a) | PTR_LINEAR(b)) & 3) == 0) #define PTR_ALIGNED2_8(a,b) (((PTR_LINEAR(a) | PTR_LINEAR(b)) & 7) == 0) #endif #define PTR_LT(a,b) (PTR(a) < PTR(b)) #define PTR_GE(a,b) (PTR(a) >= PTR(b)) #define PTR_DIFF(a,b) ((lzo_ptrdiff_t) (PTR(a) - PTR(b))) #define pd(a,b) ((lzo_uint) ((a)-(b))) LZO_EXTERN(lzo_ptr_t) __lzo_ptr_linear(const lzo_voidp ptr); typedef union { char a_char; unsigned char a_uchar; short a_short; unsigned short a_ushort; int a_int; unsigned int a_uint; long a_long; unsigned long a_ulong; lzo_int a_lzo_int; lzo_uint a_lzo_uint; lzo_int32 a_lzo_int32; lzo_uint32 a_lzo_uint32; ptrdiff_t a_ptrdiff_t; lzo_ptrdiff_t a_lzo_ptrdiff_t; lzo_ptr_t a_lzo_ptr_t; lzo_voidp a_lzo_voidp; void * a_void_p; lzo_bytep a_lzo_bytep; lzo_bytepp a_lzo_bytepp; lzo_uintp a_lzo_uintp; lzo_uint * a_lzo_uint_p; lzo_uint32p a_lzo_uint32p; lzo_uint32 * a_lzo_uint32_p; unsigned char * a_uchar_p; char * a_char_p; } lzo_full_align_t; #ifdef __cplusplus } #endif #endif #define LZO_DETERMINISTIC #define LZO_DICT_USE_PTR #if defined(__LZO_DOS16) || defined(__LZO_WIN16) || defined(__LZO_STRICT_16BIT) # undef LZO_DICT_USE_PTR #endif #if defined(LZO_DICT_USE_PTR) # define lzo_dict_t const lzo_bytep # define lzo_dict_p lzo_dict_t __LZO_MMODEL * #else # define lzo_dict_t lzo_uint # define lzo_dict_p lzo_dict_t __LZO_MMODEL * #endif #if !defined(lzo_moff_t) #define lzo_moff_t lzo_uint #endif #endif #ifndef __LZO_UTIL_H #define __LZO_UTIL_H #ifndef __LZO_CONF_H #endif #ifdef __cplusplus extern "C" { #endif #if 1 && defined(HAVE_MEMCPY) #if !defined(__LZO_DOS16) && !defined(__LZO_WIN16) #define MEMCPY8_DS(dest,src,len) \ memcpy(dest,src,len); \ dest += len; \ src += len #endif #endif #if 0 && !defined(MEMCPY8_DS) #define MEMCPY8_DS(dest,src,len) \ { do { \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ len -= 8; \ } while (len > 0); } #endif #if !defined(MEMCPY8_DS) #define MEMCPY8_DS(dest,src,len) \ { register lzo_uint __l = (len) / 8; \ do { \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ *dest++ = *src++; \ } while (--__l > 0); } #endif #define MEMCPY_DS(dest,src,len) \ do *dest++ = *src++; \ while (--len > 0) #define MEMMOVE_DS(dest,src,len) \ do *dest++ = *src++; \ while (--len > 0) #if 0 && defined(LZO_OPTIMIZE_GNUC_i386) #define BZERO8_PTR(s,l,n) \ __asm__ __volatile__( \ "movl %0,%%eax \n" \ "movl %1,%%edi \n" \ "movl %2,%%ecx \n" \ "cld \n" \ "rep \n" \ "stosl %%eax,(%%edi) \n" \ : \ :"g" (0),"g" (s),"g" (n) \ :"eax","edi","ecx", "memory", "cc" \ ) #elif (LZO_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMSET) #if 1 #define BZERO8_PTR(s,l,n) memset((s),0,(lzo_uint)(l)*(n)) #else #define BZERO8_PTR(s,l,n) memset((lzo_voidp)(s),0,(lzo_uint)(l)*(n)) #endif #else #define BZERO8_PTR(s,l,n) \ lzo_memset((lzo_voidp)(s),0,(lzo_uint)(l)*(n)) #endif #if 0 #if defined(__GNUC__) && defined(__i386__) unsigned char lzo_rotr8(unsigned char value, int shift); extern __inline__ unsigned char lzo_rotr8(unsigned char value, int shift) { unsigned char result; __asm__ __volatile__ ("movb %b1, %b0; rorb %b2, %b0" : "=a"(result) : "g"(value), "c"(shift)); return result; } unsigned short lzo_rotr16(unsigned short value, int shift); extern __inline__ unsigned short lzo_rotr16(unsigned short value, int shift) { unsigned short result; __asm__ __volatile__ ("movw %b1, %b0; rorw %b2, %b0" : "=a"(result) : "g"(value), "c"(shift)); return result; } #endif #endif #ifdef __cplusplus } #endif #endif /* If you use the LZO library in a product, you *must* keep this * copyright string in the executable of your product. */ const lzo_byte __lzo_copyright[] = #if !defined(__LZO_IN_MINLZO) LZO_VERSION_STRING; #else "\n\n\n" "LZO real-time data compression library.\n" "Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002 Markus Franz Xaver Johannes Oberhumer\n" "\n" "http://www.oberhumer.com/opensource/lzo/\n" "\n" "LZO version: v" LZO_VERSION_STRING ", " LZO_VERSION_DATE "\n" "LZO build date: " __DATE__ " " __TIME__ "\n\n" "LZO special compilation options:\n" #ifdef __cplusplus " __cplusplus\n" #endif #if defined(__PIC__) " __PIC__\n" #elif defined(__pic__) " __pic__\n" #endif #if (UINT_MAX < LZO_0xffffffffL) " 16BIT\n" #endif #if defined(__LZO_STRICT_16BIT) " __LZO_STRICT_16BIT\n" #endif #if (UINT_MAX > LZO_0xffffffffL) " UINT_MAX=" _LZO_MEXPAND(UINT_MAX) "\n" #endif #if (ULONG_MAX > LZO_0xffffffffL) " ULONG_MAX=" _LZO_MEXPAND(ULONG_MAX) "\n" #endif #if defined(LZO_BYTE_ORDER) " LZO_BYTE_ORDER=" _LZO_MEXPAND(LZO_BYTE_ORDER) "\n" #endif #if defined(LZO_UNALIGNED_OK_2) " LZO_UNALIGNED_OK_2\n" #endif #if defined(LZO_UNALIGNED_OK_4) " LZO_UNALIGNED_OK_4\n" #endif #if defined(LZO_ALIGNED_OK_4) " LZO_ALIGNED_OK_4\n" #endif #if defined(LZO_DICT_USE_PTR) " LZO_DICT_USE_PTR\n" #endif #if defined(__LZO_QUERY_COMPRESS) " __LZO_QUERY_COMPRESS\n" #endif #if defined(__LZO_QUERY_DECOMPRESS) " __LZO_QUERY_DECOMPRESS\n" #endif #if defined(__LZO_IN_MINILZO) " __LZO_IN_MINILZO\n" #endif "\n\n" "$Id: LZO " LZO_VERSION_STRING " built " __DATE__ " " __TIME__ #if defined(__GNUC__) && defined(__VERSION__) " by gcc " __VERSION__ #elif defined(__BORLANDC__) " by Borland C " _LZO_MEXPAND(__BORLANDC__) #elif defined(_MSC_VER) " by Microsoft C " _LZO_MEXPAND(_MSC_VER) #elif defined(__PUREC__) " by Pure C " _LZO_MEXPAND(__PUREC__) #elif defined(__SC__) " by Symantec C " _LZO_MEXPAND(__SC__) #elif defined(__TURBOC__) " by Turbo C " _LZO_MEXPAND(__TURBOC__) #elif defined(__WATCOMC__) " by Watcom C " _LZO_MEXPAND(__WATCOMC__) #endif " $\n" "$Copyright: LZO (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002 Markus Franz Xaver Johannes Oberhumer $\n"; #endif #define LZO_BASE 65521u #define LZO_NMAX 5552 #define LZO_DO1(buf,i) {s1 += buf[i]; s2 += s1;} #define LZO_DO2(buf,i) LZO_DO1(buf,i); LZO_DO1(buf,i+1); #define LZO_DO4(buf,i) LZO_DO2(buf,i); LZO_DO2(buf,i+2); #define LZO_DO8(buf,i) LZO_DO4(buf,i); LZO_DO4(buf,i+4); #define LZO_DO16(buf,i) LZO_DO8(buf,i); LZO_DO8(buf,i+8); LZO_PUBLIC(lzo_uint32) lzo_adler32(lzo_uint32 adler, const lzo_byte *buf, lzo_uint len) { lzo_uint32 s1 = adler & 0xffff; lzo_uint32 s2 = (adler >> 16) & 0xffff; int k; if (buf == NULL) return 1; while (len > 0) { k = len < LZO_NMAX ? (int) len : LZO_NMAX; len -= k; if (k >= 16) do { LZO_DO16(buf,0); buf += 16; k -= 16; } while (k >= 16); if (k != 0) do { s1 += *buf++; s2 += s1; } while (--k > 0); s1 %= LZO_BASE; s2 %= LZO_BASE; } return (s2 << 16) | s1; } #if 0 # define IS_SIGNED(type) (((type) (1ul << (8 * sizeof(type) - 1))) < 0) # define IS_UNSIGNED(type) (((type) (1ul << (8 * sizeof(type) - 1))) > 0) #else # define IS_SIGNED(type) (((type) (-1)) < ((type) 0)) # define IS_UNSIGNED(type) (((type) (-1)) > ((type) 0)) #endif #define IS_POWER_OF_2(x) (((x) & ((x) - 1)) == 0) // static lzo_bool schedule_insns_bug(); // static lzo_bool strength_reduce_bug(int *); #if 0 || defined(LZO_DEBUG) #include static lzo_bool __lzo_assert_fail(const char *s, unsigned line) { #if defined(__palmos__) printf("LZO assertion failed in line %u: '%s'\n",line,s); #else fprintf(stderr,"LZO assertion failed in line %u: '%s'\n",line,s); #endif return 0; } # define __lzo_assert(x) ((x) ? 1 : __lzo_assert_fail(#x,__LINE__)) #else # define __lzo_assert(x) ((x) ? 1 : 0) #endif #undef COMPILE_TIME_ASSERT #if 0 # define COMPILE_TIME_ASSERT(expr) r &= __lzo_assert(expr) #else # define COMPILE_TIME_ASSERT(expr) LZO_COMPILE_TIME_ASSERT(expr) #endif #define do_compress _lzo1x_1_do_compress #define LZO_NEED_DICT_H #define D_BITS 12 #define D_INDEX1(d,p) d = DM((0x21*DX3(p,5,5,6)) >> 5) #define D_INDEX2(d,p) d = (d & (D_MASK & 0x7ff)) ^ (D_HIGH | 0x1f) #ifndef __LZO_CONFIG1X_H #define __LZO_CONFIG1X_H #define LZO_EOF_CODE #undef LZO_DETERMINISTIC #define M1_MAX_OFFSET 0x0400 #ifndef M2_MAX_OFFSET #define M2_MAX_OFFSET 0x0800 #endif #define M3_MAX_OFFSET 0x4000 #define M4_MAX_OFFSET 0xbfff #define MX_MAX_OFFSET (M1_MAX_OFFSET + M2_MAX_OFFSET) #define M1_MIN_LEN 2 #define M1_MAX_LEN 2 #define M2_MIN_LEN 3 #ifndef M2_MAX_LEN #define M2_MAX_LEN 8 #endif #define M3_MIN_LEN 3 #define M3_MAX_LEN 33 #define M4_MIN_LEN 3 #define M4_MAX_LEN 9 #define M1_MARKER 0 #define M2_MARKER 64 #define M3_MARKER 32 #define M4_MARKER 16 #ifndef MIN_LOOKAHEAD #define MIN_LOOKAHEAD (M2_MAX_LEN + 1) #endif #if defined(LZO_NEED_DICT_H) #ifndef LZO_HASH #define LZO_HASH LZO_HASH_LZO_INCREMENTAL_B #endif #define DL_MIN_LEN M2_MIN_LEN #ifndef __LZO_DICT_H #define __LZO_DICT_H #ifdef __cplusplus extern "C" { #endif #if !defined(D_BITS) && defined(DBITS) # define D_BITS DBITS #endif #if !defined(D_BITS) # error "D_BITS is not defined" #endif #if (D_BITS < 16) # define D_SIZE LZO_SIZE(D_BITS) # define D_MASK LZO_MASK(D_BITS) #else # define D_SIZE LZO_USIZE(D_BITS) # define D_MASK LZO_UMASK(D_BITS) #endif #define D_HIGH ((D_MASK >> 1) + 1) #if !defined(DD_BITS) # define DD_BITS 0 #endif #define DD_SIZE LZO_SIZE(DD_BITS) #define DD_MASK LZO_MASK(DD_BITS) #if !defined(DL_BITS) # define DL_BITS (D_BITS - DD_BITS) #endif #if (DL_BITS < 16) # define DL_SIZE LZO_SIZE(DL_BITS) # define DL_MASK LZO_MASK(DL_BITS) #else # define DL_SIZE LZO_USIZE(DL_BITS) # define DL_MASK LZO_UMASK(DL_BITS) #endif #if (D_BITS != DL_BITS + DD_BITS) # error "D_BITS does not match" #endif #if (D_BITS < 8 || D_BITS > 18) # error "invalid D_BITS" #endif #if (DL_BITS < 8 || DL_BITS > 20) # error "invalid DL_BITS" #endif #if (DD_BITS < 0 || DD_BITS > 6) # error "invalid DD_BITS" #endif #if !defined(DL_MIN_LEN) # define DL_MIN_LEN 3 #endif #if !defined(DL_SHIFT) # define DL_SHIFT ((DL_BITS + (DL_MIN_LEN - 1)) / DL_MIN_LEN) #endif #define LZO_HASH_GZIP 1 #define LZO_HASH_GZIP_INCREMENTAL 2 #define LZO_HASH_LZO_INCREMENTAL_A 3 #define LZO_HASH_LZO_INCREMENTAL_B 4 #if !defined(LZO_HASH) # error "choose a hashing strategy" #endif #if (DL_MIN_LEN == 3) # define _DV2_A(p,shift1,shift2) \ (((( (lzo_uint32)((p)[0]) << shift1) ^ (p)[1]) << shift2) ^ (p)[2]) # define _DV2_B(p,shift1,shift2) \ (((( (lzo_uint32)((p)[2]) << shift1) ^ (p)[1]) << shift2) ^ (p)[0]) # define _DV3_B(p,shift1,shift2,shift3) \ ((_DV2_B((p)+1,shift1,shift2) << (shift3)) ^ (p)[0]) #elif (DL_MIN_LEN == 2) # define _DV2_A(p,shift1,shift2) \ (( (lzo_uint32)(p[0]) << shift1) ^ p[1]) # define _DV2_B(p,shift1,shift2) \ (( (lzo_uint32)(p[1]) << shift1) ^ p[2]) #else # error "invalid DL_MIN_LEN" #endif #define _DV_A(p,shift) _DV2_A(p,shift,shift) #define _DV_B(p,shift) _DV2_B(p,shift,shift) #define DA2(p,s1,s2) \ (((((lzo_uint32)((p)[2]) << (s2)) + (p)[1]) << (s1)) + (p)[0]) #define DS2(p,s1,s2) \ (((((lzo_uint32)((p)[2]) << (s2)) - (p)[1]) << (s1)) - (p)[0]) #define DX2(p,s1,s2) \ (((((lzo_uint32)((p)[2]) << (s2)) ^ (p)[1]) << (s1)) ^ (p)[0]) #define DA3(p,s1,s2,s3) ((DA2((p)+1,s2,s3) << (s1)) + (p)[0]) #define DS3(p,s1,s2,s3) ((DS2((p)+1,s2,s3) << (s1)) - (p)[0]) #define DX3(p,s1,s2,s3) ((DX2((p)+1,s2,s3) << (s1)) ^ (p)[0]) #define DMS(v,s) ((lzo_uint) (((v) & (D_MASK >> (s))) << (s))) #define DM(v) DMS(v,0) #if (LZO_HASH == LZO_HASH_GZIP) # define _DINDEX(dv,p) (_DV_A((p),DL_SHIFT)) #elif (LZO_HASH == LZO_HASH_GZIP_INCREMENTAL) # define __LZO_HASH_INCREMENTAL # define DVAL_FIRST(dv,p) dv = _DV_A((p),DL_SHIFT) # define DVAL_NEXT(dv,p) dv = (((dv) << DL_SHIFT) ^ p[2]) # define _DINDEX(dv,p) (dv) # define DVAL_LOOKAHEAD DL_MIN_LEN #elif (LZO_HASH == LZO_HASH_LZO_INCREMENTAL_A) # define __LZO_HASH_INCREMENTAL # define DVAL_FIRST(dv,p) dv = _DV_A((p),5) # define DVAL_NEXT(dv,p) \ dv ^= (lzo_uint32)(p[-1]) << (2*5); dv = (((dv) << 5) ^ p[2]) # define _DINDEX(dv,p) ((0x9f5f * (dv)) >> 5) # define DVAL_LOOKAHEAD DL_MIN_LEN #elif (LZO_HASH == LZO_HASH_LZO_INCREMENTAL_B) # define __LZO_HASH_INCREMENTAL # define DVAL_FIRST(dv,p) dv = _DV_B((p),5) # define DVAL_NEXT(dv,p) \ dv ^= p[-1]; dv = (((dv) >> 5) ^ ((lzo_uint32)(p[2]) << (2*5))) # define _DINDEX(dv,p) ((0x9f5f * (dv)) >> 5) # define DVAL_LOOKAHEAD DL_MIN_LEN #else # error "choose a hashing strategy" #endif #ifndef DINDEX #define DINDEX(dv,p) ((lzo_uint)((_DINDEX(dv,p)) & DL_MASK) << DD_BITS) #endif #if !defined(DINDEX1) && defined(D_INDEX1) #define DINDEX1 D_INDEX1 #endif #if !defined(DINDEX2) && defined(D_INDEX2) #define DINDEX2 D_INDEX2 #endif #if !defined(__LZO_HASH_INCREMENTAL) # define DVAL_FIRST(dv,p) ((void) 0) # define DVAL_NEXT(dv,p) ((void) 0) # define DVAL_LOOKAHEAD 0 #endif #if !defined(DVAL_ASSERT) #if defined(__LZO_HASH_INCREMENTAL) && !defined(NDEBUG) static void DVAL_ASSERT(lzo_uint32 dv, const lzo_byte *p) { lzo_uint32 df; DVAL_FIRST(df,(p)); assert(DINDEX(dv,p) == DINDEX(df,p)); } #else # define DVAL_ASSERT(dv,p) ((void) 0) #endif #endif #if defined(LZO_DICT_USE_PTR) # define DENTRY(p,in) (p) # define GINDEX(m_pos,m_off,dict,dindex,in) m_pos = dict[dindex] #else # define DENTRY(p,in) ((lzo_uint) ((p)-(in))) # define GINDEX(m_pos,m_off,dict,dindex,in) m_off = dict[dindex] #endif #if (DD_BITS == 0) # define UPDATE_D(dict,drun,dv,p,in) dict[ DINDEX(dv,p) ] = DENTRY(p,in) # define UPDATE_I(dict,drun,index,p,in) dict[index] = DENTRY(p,in) # define UPDATE_P(ptr,drun,p,in) (ptr)[0] = DENTRY(p,in) #else # define UPDATE_D(dict,drun,dv,p,in) \ dict[ DINDEX(dv,p) + drun++ ] = DENTRY(p,in); drun &= DD_MASK # define UPDATE_I(dict,drun,index,p,in) \ dict[ (index) + drun++ ] = DENTRY(p,in); drun &= DD_MASK # define UPDATE_P(ptr,drun,p,in) \ (ptr) [ drun++ ] = DENTRY(p,in); drun &= DD_MASK #endif #if defined(LZO_DICT_USE_PTR) #define LZO_CHECK_MPOS_DET(m_pos,m_off,in,ip,max_offset) \ (m_pos == NULL || (m_off = (lzo_moff_t) (ip - m_pos)) > max_offset) #define LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,max_offset) \ (BOUNDS_CHECKING_OFF_IN_EXPR( \ (PTR_LT(m_pos,in) || \ (m_off = (lzo_moff_t) PTR_DIFF(ip,m_pos)) <= 0 || \ m_off > max_offset) )) #else #define LZO_CHECK_MPOS_DET(m_pos,m_off,in,ip,max_offset) \ (m_off == 0 || \ ((m_off = (lzo_moff_t) ((ip)-(in)) - m_off) > max_offset) || \ (m_pos = (ip) - (m_off), 0) ) #define LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,max_offset) \ ((lzo_moff_t) ((ip)-(in)) <= m_off || \ ((m_off = (lzo_moff_t) ((ip)-(in)) - m_off) > max_offset) || \ (m_pos = (ip) - (m_off), 0) ) #endif #if defined(LZO_DETERMINISTIC) # define LZO_CHECK_MPOS LZO_CHECK_MPOS_DET #else # define LZO_CHECK_MPOS LZO_CHECK_MPOS_NON_DET #endif #ifdef __cplusplus } #endif #endif #endif #endif #define DO_COMPRESS lzo1x_1_compress static lzo_uint do_compress ( const lzo_byte *in , lzo_uint in_len, lzo_byte *out, lzo_uintp out_len, lzo_voidp wrkmem ) { register const lzo_byte *ip; lzo_byte *op; const lzo_byte * const in_end = in + in_len; const lzo_byte * const ip_end = in + in_len - M2_MAX_LEN - 5; const lzo_byte *ii; lzo_dict_p const dict = (lzo_dict_p) wrkmem; op = out; ip = in; ii = ip; ip += 4; for (;;) { register const lzo_byte *m_pos; lzo_moff_t m_off; lzo_ptrdiff_t m_len; lzo_uint dindex; 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 (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3]) goto try_match; DINDEX2(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 (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3]) goto try_match; goto literal; try_match: #if 1 && defined(LZO_UNALIGNED_OK_2) if (* (const lzo_ushortp) m_pos != * (const lzo_ushortp) ip) #else if (m_pos[0] != ip[0] || m_pos[1] != ip[1]) #endif { } else { if (m_pos[2] == ip[2]) { goto match; } } literal: UPDATE_I(dict,0,dindex,ip,in); ++ip; if (ip >= ip_end) break; continue; match: UPDATE_I(dict,0,dindex,ip,in); if (pd(ip,ii) > 0) { register lzo_uint t = pd(ip,ii); if (t <= 3) { assert(op - 2 > out); op[-2] |= LZO_BYTE(t); } else if (t <= 18) *op++ = LZO_BYTE(t - 3); else { register lzo_uint tt = t - 18; *op++ = 0; while (tt > 255) { tt -= 255; *op++ = 0; } assert(tt > 0); *op++ = LZO_BYTE(tt); } do *op++ = *ii++; while (--t > 0); } assert(ii == ip); ip += 3; if (m_pos[3] != *ip++ || m_pos[4] != *ip++ || m_pos[5] != *ip++ || m_pos[6] != *ip++ || m_pos[7] != *ip++ || m_pos[8] != *ip++) { --ip; m_len = ip - ii; assert(m_len >= 3); assert(m_len <= M2_MAX_LEN); if (m_off <= M2_MAX_OFFSET) { m_off -= 1; *op++ = LZO_BYTE(((m_len - 1) << 5) | ((m_off & 7) << 2)); *op++ = LZO_BYTE(m_off >> 3); } else if (m_off <= M3_MAX_OFFSET) { m_off -= 1; *op++ = LZO_BYTE(M3_MARKER | (m_len - 2)); goto m3_m4_offset; } else { m_off -= 0x4000; assert(m_off > 0); assert(m_off <= 0x7fff); *op++ = LZO_BYTE(M4_MARKER | ((m_off & 0x4000) >> 11) | (m_len - 2)); goto m3_m4_offset; } } else { { const lzo_byte *end = in_end; const lzo_byte *m = m_pos + M2_MAX_LEN + 1; while (ip < end && *m == *ip) m++, ip++; m_len = (ip - ii); } assert(m_len > M2_MAX_LEN); if (m_off <= M3_MAX_OFFSET) { m_off -= 1; if (m_len <= 33) *op++ = LZO_BYTE(M3_MARKER | (m_len - 2)); else { m_len -= 33; *op++ = M3_MARKER | 0; goto m3_m4_len; } } else { m_off -= 0x4000; assert(m_off > 0); assert(m_off <= 0x7fff); if (m_len <= M4_MAX_LEN) *op++ = LZO_BYTE(M4_MARKER | ((m_off & 0x4000) >> 11) | (m_len - 2)); else { m_len -= M4_MAX_LEN; *op++ = LZO_BYTE(M4_MARKER | ((m_off & 0x4000) >> 11)); m3_m4_len: while (m_len > 255) { m_len -= 255; *op++ = 0; } assert(m_len > 0); *op++ = LZO_BYTE(m_len); } } m3_m4_offset: *op++ = LZO_BYTE((m_off & 63) << 2); *op++ = LZO_BYTE(m_off >> 6); } ii = ip; if (ip >= ip_end) break; } *out_len = (lzo_uint)(op - out); return pd(in_end,ii); } LZO_PUBLIC(int) DO_COMPRESS ( const lzo_byte *in , lzo_uint in_len, lzo_byte *out, lzo_uintp out_len, lzo_voidp wrkmem ) { lzo_byte *op = out; lzo_uint t; if (in_len <= M2_MAX_LEN + 5) t = in_len; else { t = do_compress(in,in_len,op,out_len,wrkmem); op += *out_len; } if (t > 0) { const lzo_byte *ii = in + in_len - t; if (op == out && t <= 238) *op++ = LZO_BYTE(17 + t); else if (t <= 3) op[-2] |= LZO_BYTE(t); else if (t <= 18) *op++ = LZO_BYTE(t - 3); else { lzo_uint tt = t - 18; *op++ = 0; while (tt > 255) { tt -= 255; *op++ = 0; } assert(tt > 0); *op++ = LZO_BYTE(tt); } do *op++ = *ii++; while (--t > 0); } *op++ = M4_MARKER | 1; *op++ = 0; *op++ = 0; *out_len = (lzo_uint)(op - out); return LZO_E_OK; } #undef do_compress #undef DO_COMPRESS #undef LZO_HASH #undef LZO_TEST_DECOMPRESS_OVERRUN #undef LZO_TEST_DECOMPRESS_OVERRUN_INPUT #undef LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT #undef LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND #undef DO_DECOMPRESS #define DO_DECOMPRESS lzo1x_decompress #if defined(LZO_TEST_DECOMPRESS_OVERRUN) # if !defined(LZO_TEST_DECOMPRESS_OVERRUN_INPUT) # define LZO_TEST_DECOMPRESS_OVERRUN_INPUT 2 # endif # if !defined(LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT) # define LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT 2 # endif # if !defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND) # define LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND # endif #endif #undef TEST_IP #undef TEST_OP #undef TEST_LOOKBEHIND #undef NEED_IP #undef NEED_OP #undef HAVE_TEST_IP #undef HAVE_TEST_OP #undef HAVE_NEED_IP #undef HAVE_NEED_OP #undef HAVE_ANY_IP #undef HAVE_ANY_OP #if defined(LZO_TEST_DECOMPRESS_OVERRUN_INPUT) # if (LZO_TEST_DECOMPRESS_OVERRUN_INPUT >= 1) # define TEST_IP (ip < ip_end) # endif # if (LZO_TEST_DECOMPRESS_OVERRUN_INPUT >= 2) # define NEED_IP(x) \ if ((lzo_uint)(ip_end - ip) < (lzo_uint)(x)) goto input_overrun # endif #endif #if defined(LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT) # if (LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT >= 1) # define TEST_OP (op <= op_end) # endif # if (LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT >= 2) # undef TEST_OP # define NEED_OP(x) \ if ((lzo_uint)(op_end - op) < (lzo_uint)(x)) goto output_overrun # endif #endif #if defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND) # define TEST_LOOKBEHIND(m_pos,out) if (m_pos < out) goto lookbehind_overrun #else # define TEST_LOOKBEHIND(m_pos,op) ((void) 0) #endif #if !defined(LZO_EOF_CODE) && !defined(TEST_IP) # define TEST_IP (ip < ip_end) #endif #if defined(TEST_IP) # define HAVE_TEST_IP #else # define TEST_IP 1 #endif #if defined(TEST_OP) # define HAVE_TEST_OP #else # define TEST_OP 1 #endif #if defined(NEED_IP) # define HAVE_NEED_IP #else # define NEED_IP(x) ((void) 0) #endif #if defined(NEED_OP) # define HAVE_NEED_OP #else # define NEED_OP(x) ((void) 0) #endif #if defined(HAVE_TEST_IP) || defined(HAVE_NEED_IP) # define HAVE_ANY_IP #endif #if defined(HAVE_TEST_OP) || defined(HAVE_NEED_OP) # define HAVE_ANY_OP #endif #undef __COPY4 #define __COPY4(dst,src) * (lzo_uint32p)(dst) = * (const lzo_uint32p)(src) #undef COPY4 #if defined(LZO_UNALIGNED_OK_4) # define COPY4(dst,src) __COPY4(dst,src) #elif defined(LZO_ALIGNED_OK_4) # define COPY4(dst,src) __COPY4((lzo_ptr_t)(dst),(lzo_ptr_t)(src)) #endif #if defined(DO_DECOMPRESS) LZO_PUBLIC(int) DO_DECOMPRESS ( const lzo_byte *in , lzo_uint in_len, lzo_byte *out, lzo_uintp out_len, lzo_voidp wrkmem ) #endif { register lzo_byte *op; register const lzo_byte *ip; register lzo_uint t; register const lzo_byte *m_pos; const lzo_byte * const ip_end = in + in_len; #if defined(HAVE_ANY_OP) lzo_byte * const op_end = out + *out_len; #endif LZO_UNUSED(wrkmem); *out_len = 0; op = out; ip = in; if (*ip > 17) { t = *ip++ - 17; if (t < 4) goto match_next; assert(t > 0); NEED_OP(t); NEED_IP(t+1); do *op++ = *ip++; while (--t > 0); goto first_literal_run; } while (TEST_IP && TEST_OP) { t = *ip++; if (t >= 16) goto match; if (t == 0) { NEED_IP(1); while (*ip == 0) { t += 255; ip++; NEED_IP(1); } t += 15 + *ip++; } assert(t > 0); NEED_OP(t+3); NEED_IP(t+4); #if defined(LZO_UNALIGNED_OK_4) || defined(LZO_ALIGNED_OK_4) #if !defined(LZO_UNALIGNED_OK_4) if (PTR_ALIGNED2_4(op,ip)) { #endif COPY4(op,ip); op += 4; ip += 4; if (--t > 0) { if (t >= 4) { do { COPY4(op,ip); op += 4; ip += 4; t -= 4; } while (t >= 4); if (t > 0) do *op++ = *ip++; while (--t > 0); } else do *op++ = *ip++; while (--t > 0); } #if !defined(LZO_UNALIGNED_OK_4) } else #endif #endif #if !defined(LZO_UNALIGNED_OK_4) { *op++ = *ip++; *op++ = *ip++; *op++ = *ip++; do *op++ = *ip++; while (--t > 0); } #endif first_literal_run: t = *ip++; if (t >= 16) goto match; m_pos = op - (1 + M2_MAX_OFFSET); m_pos -= t >> 2; m_pos -= *ip++ << 2; TEST_LOOKBEHIND(m_pos,out); NEED_OP(3); *op++ = *m_pos++; *op++ = *m_pos++; *op++ = *m_pos; goto match_done; while (TEST_IP && TEST_OP) { match: if (t >= 64) { #if defined(LZO1X) m_pos = op - 1; m_pos -= (t >> 2) & 7; m_pos -= *ip++ << 3; t = (t >> 5) - 1; #endif TEST_LOOKBEHIND(m_pos,out); assert(t > 0); NEED_OP(t+3-1); goto copy_match; } else if (t >= 32) { t &= 31; if (t == 0) { NEED_IP(1); while (*ip == 0) { t += 255; ip++; NEED_IP(1); } t += 31 + *ip++; } #if defined(LZO_UNALIGNED_OK_2) && (LZO_BYTE_ORDER == LZO_LITTLE_ENDIAN) m_pos = op - 1; m_pos -= (* (const lzo_ushortp) ip) >> 2; #else m_pos = op - 1; m_pos -= (ip[0] >> 2) + (ip[1] << 6); #endif ip += 2; } else if (t >= 16) { m_pos = op; m_pos -= (t & 8) << 11; t &= 7; if (t == 0) { NEED_IP(1); while (*ip == 0) { t += 255; ip++; NEED_IP(1); } t += 7 + *ip++; } #if defined(LZO_UNALIGNED_OK_2) && (LZO_BYTE_ORDER == LZO_LITTLE_ENDIAN) m_pos -= (* (const lzo_ushortp) ip) >> 2; #else m_pos -= (ip[0] >> 2) + (ip[1] << 6); #endif ip += 2; if (m_pos == op) goto eof_found; m_pos -= 0x4000; } else { m_pos = op - 1; m_pos -= t >> 2; m_pos -= *ip++ << 2; TEST_LOOKBEHIND(m_pos,out); NEED_OP(2); *op++ = *m_pos++; *op++ = *m_pos; goto match_done; } TEST_LOOKBEHIND(m_pos,out); assert(t > 0); NEED_OP(t+3-1); #if defined(LZO_UNALIGNED_OK_4) || defined(LZO_ALIGNED_OK_4) #if !defined(LZO_UNALIGNED_OK_4) if (t >= 2 * 4 - (3 - 1) && PTR_ALIGNED2_4(op,m_pos)) { assert((op - m_pos) >= 4); #else if (t >= 2 * 4 - (3 - 1) && (op - m_pos) >= 4) { #endif COPY4(op,m_pos); op += 4; m_pos += 4; t -= 4 - (3 - 1); do { COPY4(op,m_pos); op += 4; m_pos += 4; t -= 4; } while (t >= 4); if (t > 0) do *op++ = *m_pos++; while (--t > 0); } else #endif { copy_match: *op++ = *m_pos++; *op++ = *m_pos++; do *op++ = *m_pos++; while (--t > 0); } match_done: t = ip[-2] & 3; if (t == 0) break; match_next: assert(t > 0); NEED_OP(t); NEED_IP(t+1); do *op++ = *ip++; while (--t > 0); t = *ip++; } } #if defined(HAVE_TEST_IP) || defined(HAVE_TEST_OP) *out_len = op - out; return LZO_E_EOF_NOT_FOUND; #endif eof_found: assert(t == 1); *out_len = (lzo_uint)(op - out); return (ip == ip_end ? LZO_E_OK : (ip < ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN)); #if defined(HAVE_NEED_IP) input_overrun: *out_len = op - out; return LZO_E_INPUT_OVERRUN; #endif #if defined(HAVE_NEED_OP) output_overrun: *out_len = op - out; return LZO_E_OUTPUT_OVERRUN; #endif #if defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND) lookbehind_overrun: *out_len = op - out; return LZO_E_LOOKBEHIND_OVERRUN; #endif } #define LZO_TEST_DECOMPRESS_OVERRUN #undef DO_DECOMPRESS #define DO_DECOMPRESS lzo1x_decompress_safe #if defined(LZO_TEST_DECOMPRESS_OVERRUN) # if !defined(LZO_TEST_DECOMPRESS_OVERRUN_INPUT) # define LZO_TEST_DECOMPRESS_OVERRUN_INPUT 2 # endif # if !defined(LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT) # define LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT 2 # endif # if !defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND) # define LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND # endif #endif #undef TEST_IP #undef TEST_OP #undef TEST_LOOKBEHIND #undef NEED_IP #undef NEED_OP #undef HAVE_TEST_IP #undef HAVE_TEST_OP #undef HAVE_NEED_IP #undef HAVE_NEED_OP #undef HAVE_ANY_IP #undef HAVE_ANY_OP #if 0 #if defined(LZO_TEST_DECOMPRESS_OVERRUN_INPUT) # if (LZO_TEST_DECOMPRESS_OVERRUN_INPUT >= 1) # define TEST_IP (ip < ip_end) # endif # if (LZO_TEST_DECOMPRESS_OVERRUN_INPUT >= 2) # define NEED_IP(x) \ if ((lzo_uint)(ip_end - ip) < (lzo_uint)(x)) goto input_overrun # endif #endif #if defined(LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT) # if (LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT >= 1) # define TEST_OP (op <= op_end) # endif # if (LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT >= 2) # undef TEST_OP # define NEED_OP(x) \ if ((lzo_uint)(op_end - op) < (lzo_uint)(x)) goto output_overrun # endif #endif #if defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND) # define TEST_LOOKBEHIND(m_pos,out) if (m_pos < out) goto lookbehind_overrun #else # define TEST_LOOKBEHIND(m_pos,op) ((void) 0) #endif #if !defined(LZO_EOF_CODE) && !defined(TEST_IP) # define TEST_IP (ip < ip_end) #endif #if defined(TEST_IP) # define HAVE_TEST_IP #else # define TEST_IP 1 #endif #if defined(TEST_OP) # define HAVE_TEST_OP #else # define TEST_OP 1 #endif #if defined(NEED_IP) # define HAVE_NEED_IP #else # define NEED_IP(x) ((void) 0) #endif #if defined(NEED_OP) # define HAVE_NEED_OP #else # define NEED_OP(x) ((void) 0) #endif #if defined(HAVE_TEST_IP) || defined(HAVE_NEED_IP) # define HAVE_ANY_IP #endif #if defined(HAVE_TEST_OP) || defined(HAVE_NEED_OP) # define HAVE_ANY_OP #endif #undef __COPY4 #define __COPY4(dst,src) * (lzo_uint32p)(dst) = * (const lzo_uint32p)(src) #undef COPY4 #if defined(LZO_UNALIGNED_OK_4) # define COPY4(dst,src) __COPY4(dst,src) #elif defined(LZO_ALIGNED_OK_4) # define COPY4(dst,src) __COPY4((lzo_ptr_t)(dst),(lzo_ptr_t)(src)) #endif #if defined(DO_DECOMPRESS) LZO_PUBLIC(int) DO_DECOMPRESS ( const lzo_byte *in , lzo_uint in_len, lzo_byte *out, lzo_uintp out_len, lzo_voidp wrkmem ) #endif { register lzo_byte *op; register const lzo_byte *ip; register lzo_uint t; register const lzo_byte *m_pos; const lzo_byte * const ip_end = in + in_len; #if defined(HAVE_ANY_OP) lzo_byte * const op_end = out + *out_len; #endif LZO_UNUSED(wrkmem); *out_len = 0; op = out; ip = in; if (*ip > 17) { t = *ip++ - 17; if (t < 4) goto match_next; assert(t > 0); NEED_OP(t); NEED_IP(t+1); do *op++ = *ip++; while (--t > 0); goto first_literal_run; } while (TEST_IP && TEST_OP) { t = *ip++; if (t >= 16) goto match; if (t == 0) { NEED_IP(1); while (*ip == 0) { t += 255; ip++; NEED_IP(1); } t += 15 + *ip++; } assert(t > 0); NEED_OP(t+3); NEED_IP(t+4); #if defined(LZO_UNALIGNED_OK_4) || defined(LZO_ALIGNED_OK_4) #if !defined(LZO_UNALIGNED_OK_4) if (PTR_ALIGNED2_4(op,ip)) { #endif COPY4(op,ip); op += 4; ip += 4; if (--t > 0) { if (t >= 4) { do { COPY4(op,ip); op += 4; ip += 4; t -= 4; } while (t >= 4); if (t > 0) do *op++ = *ip++; while (--t > 0); } else do *op++ = *ip++; while (--t > 0); } #if !defined(LZO_UNALIGNED_OK_4) } else #endif #endif #if !defined(LZO_UNALIGNED_OK_4) { *op++ = *ip++; *op++ = *ip++; *op++ = *ip++; do *op++ = *ip++; while (--t > 0); } #endif first_literal_run: t = *ip++; if (t >= 16) goto match; #if defined(LZO1Z) t = (1 + M2_MAX_OFFSET) + (t << 6) + (*ip++ >> 2); m_pos = op - t; last_m_off = t; #else m_pos = op - (1 + M2_MAX_OFFSET); m_pos -= t >> 2; m_pos -= *ip++ << 2; #endif TEST_LOOKBEHIND(m_pos,out); NEED_OP(3); *op++ = *m_pos++; *op++ = *m_pos++; *op++ = *m_pos; goto match_done; while (TEST_IP && TEST_OP) { match: if (t >= 64) { #if defined(LZO1X) m_pos = op - 1; m_pos -= (t >> 2) & 7; m_pos -= *ip++ << 3; t = (t >> 5) - 1; #elif defined(LZO1Y) m_pos = op - 1; m_pos -= (t >> 2) & 3; m_pos -= *ip++ << 2; t = (t >> 4) - 3; #elif defined(LZO1Z) { lzo_uint off = t & 0x1f; m_pos = op; if (off >= 0x1c) { assert(last_m_off > 0); m_pos -= last_m_off; } else { off = 1 + (off << 6) + (*ip++ >> 2); m_pos -= off; last_m_off = off; } } t = (t >> 5) - 1; #endif TEST_LOOKBEHIND(m_pos,out); assert(t > 0); NEED_OP(t+3-1); goto copy_match; } else if (t >= 32) { t &= 31; if (t == 0) { NEED_IP(1); while (*ip == 0) { t += 255; ip++; NEED_IP(1); } t += 31 + *ip++; } #if defined(LZO1Z) { lzo_uint off = 1 + (ip[0] << 6) + (ip[1] >> 2); m_pos = op - off; last_m_off = off; } #elif defined(LZO_UNALIGNED_OK_2) && (LZO_BYTE_ORDER == LZO_LITTLE_ENDIAN) m_pos = op - 1; m_pos -= (* (const lzo_ushortp) ip) >> 2; #else m_pos = op - 1; m_pos -= (ip[0] >> 2) + (ip[1] << 6); #endif ip += 2; } else if (t >= 16) { m_pos = op; m_pos -= (t & 8) << 11; t &= 7; if (t == 0) { NEED_IP(1); while (*ip == 0) { t += 255; ip++; NEED_IP(1); } t += 7 + *ip++; } #if defined(LZO1Z) m_pos -= (ip[0] << 6) + (ip[1] >> 2); #elif defined(LZO_UNALIGNED_OK_2) && (LZO_BYTE_ORDER == LZO_LITTLE_ENDIAN) m_pos -= (* (const lzo_ushortp) ip) >> 2; #else m_pos -= (ip[0] >> 2) + (ip[1] << 6); #endif ip += 2; if (m_pos == op) goto eof_found; m_pos -= 0x4000; #if defined(LZO1Z) last_m_off = op - m_pos; #endif } else { #if defined(LZO1Z) t = 1 + (t << 6) + (*ip++ >> 2); m_pos = op - t; last_m_off = t; #else m_pos = op - 1; m_pos -= t >> 2; m_pos -= *ip++ << 2; #endif TEST_LOOKBEHIND(m_pos,out); NEED_OP(2); *op++ = *m_pos++; *op++ = *m_pos; goto match_done; } TEST_LOOKBEHIND(m_pos,out); assert(t > 0); NEED_OP(t+3-1); #if defined(LZO_UNALIGNED_OK_4) || defined(LZO_ALIGNED_OK_4) #if !defined(LZO_UNALIGNED_OK_4) if (t >= 2 * 4 - (3 - 1) && PTR_ALIGNED2_4(op,m_pos)) { assert((op - m_pos) >= 4); #else if (t >= 2 * 4 - (3 - 1) && (op - m_pos) >= 4) { #endif COPY4(op,m_pos); op += 4; m_pos += 4; t -= 4 - (3 - 1); do { COPY4(op,m_pos); op += 4; m_pos += 4; t -= 4; } while (t >= 4); if (t > 0) do *op++ = *m_pos++; while (--t > 0); } else #endif { copy_match: *op++ = *m_pos++; *op++ = *m_pos++; do *op++ = *m_pos++; while (--t > 0); } match_done: #if defined(LZO1Z) t = ip[-1] & 3; #else t = ip[-2] & 3; #endif if (t == 0) break; match_next: assert(t > 0); NEED_OP(t); NEED_IP(t+1); do *op++ = *ip++; while (--t > 0); t = *ip++; } } #if defined(HAVE_TEST_IP) || defined(HAVE_TEST_OP) *out_len = op - out; return LZO_E_EOF_NOT_FOUND; #endif eof_found: assert(t == 1); *out_len = op - out; return (ip == ip_end ? LZO_E_OK : (ip < ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN)); #if defined(HAVE_NEED_IP) input_overrun: *out_len = op - out; return LZO_E_INPUT_OVERRUN; #endif #if defined(HAVE_NEED_OP) output_overrun: *out_len = op - out; return LZO_E_OUTPUT_OVERRUN; #endif #if defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND) lookbehind_overrun: *out_len = op - out; return LZO_E_LOOKBEHIND_OVERRUN; #endif } #endif /***** End of minilzo.c *****/