201 lines
5.4 KiB
C
201 lines
5.4 KiB
C
#ifndef _XPRS_H_
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#define _XPRS_H_
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/* ------------------------------------------------------------------------ */
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/* */
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/* Copyright (c) Microsoft Corporation, 2000-2001. All rights reserved. */
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/* Copyright (c) Andrew Kadatch, 1991-2001. All rights reserved. */
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/* */
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/* Microsoft Confidential -- do not redistribute. */
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/* */
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/* ------------------------------------------------------------------------ */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "xpress.h"
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#ifdef _MSC_VER
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#pragma code_seg ("PAGELK")
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#ifdef _M_IX86
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#pragma optimize ("tgaw", on)
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#else
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#pragma optimize ("tgw", on)
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#endif /* _M_IX86 */
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#endif
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/* ------------------------ Configuration ----------------------------- */
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/* ------------- */
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#ifndef CODING_ALG
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#define CODING_ALG 1
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#endif
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#define CODING_DIRECT2 (1 << 1)
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#define CODING_DIRECT (1 << 2)
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#define CODING_BY_BIT (1 << 3)
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#define CODING_HUFF_LEN (1 << 4)
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#define CODING_HUFF_PTR (1 << 5)
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#define CODING_HUFF_ALL (1 << 6)
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#define CODING (1 << CODING_ALG)
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#define SUPPORT_CRC 0
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#define BUFF_SIZE_LOG XPRESS_MAX_BLOCK_LOG
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#define BUFF_SIZE (1<<BUFF_SIZE_LOG)
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#if 1
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#define MAX_OFFSET (BUFF_SIZE_LOG > 16 ? 16 : BUFF_SIZE_LOG)
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#else
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#define MAX_OFFSET 13
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#endif
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#if CODING == CODING_DIRECT2 && MAX_OFFSET > 13
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#undef MAX_OFFSET
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#define MAX_OFFSET 13
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#define DIRECT2_LEN_LOG (16 - MAX_OFFSET)
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#define DIRECT2_MAX_LEN ((1 << DIRECT2_LEN_LOG) - 1)
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#endif
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#if BUFF_SIZE < XPRESS_MAX_BLOCK
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#error BUFF_SIZE should not be less than XPRESS_MAX_BLOCK
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#endif
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#if CODING == CODING_HUFF_LEN
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#define MAX_LENGTH 32
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#define HUFF_SIZE (MAX_LENGTH * 2)
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#elif CODING & (CODING_HUFF_PTR | CODING_HUFF_ALL)
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#if (256 / MAX_OFFSET) >= 32
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#define MAX_LENGTH_LOG 5
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#else
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#define MAX_LENGTH_LOG 4
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#endif
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#define MAX_LENGTH (1 << MAX_LENGTH_LOG)
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#if CODING == CODING_HUFF_PTR
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#define HUFF_SIZE ((MAX_LENGTH * MAX_OFFSET + 1) & ~1)
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#elif CODING == CODING_HUFF_ALL
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#define HUFF_SIZE (256 + ((MAX_LENGTH * MAX_OFFSET + 1) & ~1))
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#endif
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#endif
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#define MIN_MATCH 3 /* min acceptable match length */
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#if CODING == CODING_HUFF_LEN
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#define DECODE_BITS 8
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#elif CODING & (CODING_HUFF_PTR | CODING_HUFF_ALL)
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#define DECODE_BITS 10
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#endif
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/* ---------------------- Useful types ------------------------ */
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/* ------------ */
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#if defined (_M_IX86) && !defined (i386)
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#define i386 1 /* ifdef i386 asm code will be used for some encodings */
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#endif
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#define uchar unsigned char /* useful types */
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#define schar signed char
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#ifdef _M_IX86
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#define __unaligned /* x86 does not have __unaligned keyword */
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#endif
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#define int4 int /* any long enough integral type */
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#define int2 short /* assert (2*sizeof(int2) == sizeof (int4)) */
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#define xint int /* any int type >= 32 bits && >= sizeof (bitmask4) */
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#define int32 int /* 32 bit type */
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#define int16 short /* 16 bit type */
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#define tag_t int32
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#ifdef i386
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#define bitmask4 int32 /* must be 32 bit for i386 */
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#define bitmask2 int16
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#else
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#define bitmask4 int4 /* not important otherwise; shall not exceed xint */
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#define bitmask2 int2
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#endif
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#define uint4 unsigned int4
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#define uint2 unsigned int2
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#define uxint unsigned xint
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#define uint32 unsigned int32
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#define uint16 unsigned int16
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#define utag_t unsigned tag_t
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#define ubitmask4 unsigned bitmask4
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#define ubitmask2 unsigned bitmask2
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#ifdef _MSC_VER
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#if _MSC_VER >= 1200
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#define INLINE __forceinline
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#else
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#define INLINE __inline
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#endif
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#pragma warning(disable:4127) /* conditional expression is constant */
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#pragma warning(disable:4711) /* function XXX selected for automatic inline expansion */
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#pragma warning(disable:4710) /* function XXX not expanded */
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#pragma warning(disable:4100) /* unreferenced formal paramter */
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#pragma warning(disable:4068) /* bogus "unknown pragma" */
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#endif
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#ifndef DEBUG
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#define DEBUG 0
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#endif
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#if !defined (INLINE) || DEBUG
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#undef INLINE
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#define INLINE static
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#endif
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#if !DEBUG
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#undef assert
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#define assert(x)
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#endif
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#if CODING & (CODING_DIRECT | CODING_DIRECT2)
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#define MIN_SIZE0 8
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#elif CODING == CODING_BY_BIT
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#define MIN_SIZE0 7
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#elif CODING == CODING_HUFF_LEN
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#define MIN_SIZE0 44
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#elif CODING == CODING_HUFF_PTR
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#define MIN_SIZE0 139
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#elif CODING == CODING_HUFF_ALL
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#define MIN_SIZE0 261
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#else
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#error wrong CODING
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#endif
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#define MIN_SIZE (MIN_SIZE0 + CRC_STAMP_SIZE)
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#define CRC32_FIRST 0
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#if SUPPORT_CRC
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#define CRC_STAMP_SIZE sizeof (uint32)
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#else
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#define CRC_STAMP_SIZE 0
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#endif
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#if DEBUG
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extern long xxx[];
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#endif
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#ifdef _MSC_VER
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#pragma warning (disable: 4731) /* frame pointer register 'ebp' modified by inline assembly code */
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#endif
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#if CODING_ALG != 1 && CODING_ALG != 6
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#error CODING_ALGs different from 1 and 6 are not supported anymore
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#endif
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#endif /* _XPRS_H_ */
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