gzip.h

来自「ADS下的bios工程」· C头文件 代码 · 共 68 行

/* 
 * gzip.h -- common declarations for all gzip modules
 * Copyright (C) 1992-1993 Jean-loup Gailly.
 * This is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License, see the file COPYING.
 * 
 */
#ifndef _BIOS_GZIP_H
#define _BIOS_GZIP_H

#include <bios/types.h>

/* gzip flag byte */
#define ASCII_FLAG   0x01 /* bit 0 set: file probably ascii text */
#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
#define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */
#define ORIG_NAME    0x08 /* bit 3 set: original file name present */
#define COMMENT      0x10 /* bit 4 set: file comment present */
#define ENCRYPTED    0x20 /* bit 5 set: file is encrypted */
#define RESERVED     0xC0 /* bit 6,7:   reserved */


#ifndef WSIZE
#  define WSIZE 0x8000     /* window size--must be a power of two, and */
#endif                     /*  at least 32K for zip's deflate method */

#define MIN_MATCH  3
#define MAX_MATCH  258
/* The minimum and maximum match lengths */

extern int decrypt;        /* flag to turn on decryption */
extern int save_orig_name; /* set if original name must be saved */
extern int verbose;        /* be verbose (-v) */
extern int level;          /* compression level */
extern int test;           /* check .z file integrity */
extern int to_stdout;      /* output to stdout (-c) */

//#define get_byte()  (inptr < insize ? inbuf[inptr++] : fill_inbuf())
#define get_byte()  inbuf[inptr++]

/* put_byte is used for the compressed output, put_char for the
 * uncompressed output. However unlzw() uses window for its
 * suffix table instead of its output buffer, so it does not use put_char.
 * (to be cleaned up).
 */

/* Diagnostic functions */
#if  DEBUG_BIOS_ZIP
#  define Assert(cond,msg) {if(!(cond)) error(msg);}
#  define Trace(x) fprintf x
#  define Tracev(x) {if (verbose) printf x ;}
#  define Tracevv(x) {if (verbose>1) printf x ;}
#  define Tracec(c,x) {if (verbose && (c)) printf x ;}
#  define Tracex(c,x) {if (c) printf x ;}
#  define Tracecv(c,x) {if (verbose>1 && (c)) printf x ;}
#else
#  define Assert(cond,msg)
#  define Trace(x)
#  define Tracev(x)
#  define Tracevv(x)
#  define Tracec(c,x)
#  define Tracecv(c,x)
#endif

extern u32 decompress_kernel(u32 out, u32 in, u32 size); 

#endif /* _BIOS_GZIP_H */