1 /* zutil.h -- internal interface and configuration of the compression library
2  * Copyright (C) 1995-2005 Jean-loup Gailly.
3  * For conditions of distribution and use, see copyright notice in zlib.h
4  */
5 
6 /* WARNING: this file should *not* be used by applications. It is
7    part of the implementation of the compression library and is
8    subject to change. Applications should only use zlib.h.
9  */
10 
11 /* @(#) $Id$ */
12 
13 #ifndef ZUTIL_H
14 #define ZUTIL_H
15 
16 #define ZLIB_INTERNAL
17 #include "zlib.h"
18 
19 #ifdef STDC
20 #  ifndef _WIN32_WCE
21 #    include <stddef.h>
22 #  endif
23 #  include <string.h>
24 #  include <stdlib.h>
25 #endif
26 #ifdef NO_ERRNO_H
27 #   ifdef _WIN32_WCE
28       /* The Microsoft C Run-Time Library for Windows CE doesn't have
29        * errno.  We define it as a global variable to simplify porting.
30        * Its value is always 0 and should not be used.  We rename it to
31        * avoid conflict with other libraries that use the same workaround.
32        */
33 #     define errno z_errno
34 #   endif
35     extern int errno;
36 #else
37 #  ifndef _WIN32_WCE
38 #    include <errno.h>
39 #  endif
40 #endif
41 
42 #ifndef local
43 #  define local static
44 #endif
45 /* compile with -Dlocal if your debugger can't find static symbols */
46 
47 typedef unsigned char  uch;
48 typedef uch FAR uchf;
49 typedef unsigned short ush;
50 typedef ush FAR ushf;
51 typedef unsigned long  ulg;
52 
53 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
54 /* (size given to avoid silly warnings with Visual C++) */
55 
56 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
57 
58 #define ERR_RETURN(strm,err) \
59   return (strm->msg = (char*)ERR_MSG(err), (err))
60 /* To be used only when the state is known to be valid */
61 
62         /* common constants */
63 
64 #ifndef DEF_WBITS
65 #  define DEF_WBITS MAX_WBITS
66 #endif
67 /* default windowBits for decompression. MAX_WBITS is for compression only */
68 
69 #if MAX_MEM_LEVEL >= 8
70 #  define DEF_MEM_LEVEL 8
71 #else
72 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
73 #endif
74 /* default memLevel */
75 
76 #define STORED_BLOCK 0
77 #define STATIC_TREES 1
78 #define DYN_TREES    2
79 /* The three kinds of block type */
80 
81 #define MIN_MATCH  3
82 #define MAX_MATCH  258
83 /* The minimum and maximum match lengths */
84 
85 	 /* functions */
86 #ifdef CONFIG_GZIP_COMPRESSED
87 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
88 #  define OS_CODE  0x03  /* assume Unix */
89 #endif
90 
91 #include <linux/string.h>
92 #define zmemcpy memcpy
93 #define zmemcmp memcmp
94 #define zmemzero(dest, len) memset(dest, 0, len)
95 
96 /* Diagnostic functions */
97 #ifdef DEBUG
98 /* Not valid for U-Boot
99 #  include <stdio.h> */
100    extern int z_verbose;
101    extern void z_error    OF((char *m));
102 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
103 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
104 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
105 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
106 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
107 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
108 #else
109 #  define Assert(cond,msg)
110 #  define Trace(x)
111 #  define Tracev(x)
112 #  define Tracevv(x)
113 #  define Tracec(c,x)
114 #  define Tracecv(c,x)
115 #endif
116 
117 
118 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
119 void   zcfree  OF((voidpf opaque, voidpf ptr, unsigned size));
120 
121 #define ZALLOC(strm, items, size) \
122            (*((strm)->zalloc))((strm)->opaque, (items), (size))
123 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr), 0)
124 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
125 
126 #endif /* ZUTIL_H */
127