216 lines
4.3 KiB
NASM
216 lines
4.3 KiB
NASM
; zutil.asm -- target dependent utility functions for the compression library
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; Copyright (C) 1995-2005, 2010, 2011, 2012 Jean-loup Gailly.
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; For conditions of distribution and use, see copyright notice in zlib.inc
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align 4
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z_errmsg dd ze0,ze1,ze2,ze3,ze4,ze5,ze6,ze7,ze8,ze9
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ze0 db 'need dictionary',0 ;Z_NEED_DICT 2
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ze1 db 'stream end',0 ;Z_STREAM_END 1
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ze2 db '',0 ;Z_OK 0
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ze3 db 'file error',0 ;Z_ERRNO (-1)
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ze4 db 'stream error',0 ;Z_STREAM_ERROR (-2)
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ze5 db 'data error',0 ;Z_DATA_ERROR (-3)
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ze6 db 'insufficient memory',0 ;Z_MEM_ERROR (-4)
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ze7 db 'buffer error',0 ;Z_BUF_ERROR (-5)
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ze8 db 'incompatible version',0 ;Z_VERSION_ERROR (-6)
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ze9 db '',0
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;const char * ()
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align 4
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proc zlibVersion
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mov eax,ZLIB_VERSION;
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ret
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endp
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;uLong ()
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align 4
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proc zlibCompileFlags
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; uLong flags;
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; flags = 0;
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; switch ((int)(sizeof(uInt))) {
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; case 2: break;
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; case 4: flags += 1; break;
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; case 8: flags += 2; break;
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; default: flags += 3;
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; }
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; switch ((int)(sizeof(uLong))) {
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; case 2: break;
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; case 4: flags += 1 << 2; break;
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; case 8: flags += 2 << 2; break;
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; default: flags += 3 << 2;
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; }
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; switch ((int)(sizeof(voidpf))) {
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; case 2: break;
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; case 4: flags += 1 << 4; break;
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; case 8: flags += 2 << 4; break;
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; default: flags += 3 << 4;
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; }
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; switch ((int)(sizeof(z_off_t))) {
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; case 2: break;
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; case 4: flags += 1 << 6; break;
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; case 8: flags += 2 << 6; break;
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; default: flags += 3 << 6;
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; }
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;if DEBUG
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; flags += 1 << 8;
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;end if
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;#if defined(ASMV) || defined(ASMINF)
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; flags += 1 << 9;
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;end if
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if ZLIB_WINAPI eq 1
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; flags += 1 << 10;
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end if
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if BUILDFIXED eq 1
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; flags += 1 << 12;
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end if
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if DYNAMIC_CRC_TABLE eq 1
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; flags += 1 << 13;
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end if
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if NO_GZCOMPRESS eq 1
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; flags += 1L << 16;
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end if
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if NO_GZIP eq 1
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; flags += 1L << 17;
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end if
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if PKZIP_BUG_WORKAROUND eq 1
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; flags += 1L << 20;
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end if
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if FASTEST eq 1
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; flags += 1L << 21;
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end if
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;#if defined(STDC) || defined(Z_HAVE_STDARG_H)
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;# ifdef NO_vsnprintf
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; flags += 1L << 25;
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;# ifdef HAS_vsprintf_void
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; flags += 1L << 26;
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;# endif
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;# else
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;# ifdef HAS_vsnprintf_void
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; flags += 1L << 26;
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;# endif
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;# endif
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;#else
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; flags += 1L << 24;
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;# ifdef NO_snprintf
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; flags += 1L << 25;
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;# ifdef HAS_sprintf_void
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; flags += 1L << 26;
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;# endif
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;# else
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;# ifdef HAS_snprintf_void
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; flags += 1L << 26;
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;# endif
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;# endif
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;end if
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; return flags;
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ret
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endp
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;void (char *m)
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align 4
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proc z_error, m:dword
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; fprintf(stderr, "%s\n", m);
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; exit(1);
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ret
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endp
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; exported to allow conversion of error code to string for compress() and
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; uncompress()
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;const char * (int err)
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align 4
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proc zError uses ecx, err:dword
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ERR_MSG [err]
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mov eax,ecx
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ret
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endp
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;#ifndef HAVE_MEMCPY
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;void (dest, source, len)
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; Bytef* dest
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; const Bytef* source
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; uInt len
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align 4
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proc zmemcpy uses ecx edi esi, dest:dword, source:dword, len:dword
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mov ecx,[len]
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test ecx,ecx
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jz .end0
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mov edi,[dest]
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mov esi,[source]
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bt ecx,0 ;кратно 2 ?
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jnc @f
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rep movsb
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jmp .end0
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@@:
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bt ecx,1 ;кратно 4 ?
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jnc @f
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shr ecx,1
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rep movsw
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jmp .end0
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@@:
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shr ecx,2
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rep movsd
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.end0:
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ret
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endp
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;int (s1, s2, len)
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; const Bytef* s1
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; const Bytef* s2
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; uInt len
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align 4
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proc zmemcmp, s1:dword, s2:dword, len:dword
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; uInt j;
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; for (j = 0; j < len; j++) {
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; if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
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; }
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; return 0;
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ret
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endp
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;void (Bytef* dest, uInt len)
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align 4
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proc zmemzero uses eax ecx edi, dest:dword, len:dword
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mov ecx,[len]
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test ecx,ecx
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jz .end0
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xor eax,eax
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mov edi,[dest]
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bt ecx,0 ;кратно 2 ?
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jnc @f
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rep stosb
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jmp .end0
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@@:
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bt ecx,1 ;кратно 4 ?
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jnc @f
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shr ecx,1
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rep stosw
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jmp .end0
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@@:
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shr ecx,2
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rep stosd
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.end0:
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ret
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endp
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;end if
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;voidpf (voidpf opaque, unsigned items, unsigned size)
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align 4
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proc zcalloc uses ebx ecx, opaque:dword, items:dword, size:dword
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mov ecx,[size]
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imul ecx,[items]
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mcall SF_SYS_MISC, SSF_MEM_ALLOC
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ret
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endp
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;void (voidpf opaque, voidpf ptr)
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align 4
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proc zcfree uses eax ebx ecx, opaque:dword, p2ptr:dword
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mcall SF_SYS_MISC, SSF_MEM_FREE, [p2ptr]
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ret
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endp
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