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1 /* zconf.h -- configuration of the zlib compression library
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2 * Copyright (C) 1995 Jean-loup Gailly.
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3 * For conditions of distribution and use, see copyright notice in zlib.h
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4 */
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5
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6 /* $Id: zconf.h,v 1.1.1.1 1997/12/06 04:37:18 darius Exp $ */
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7
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8 #ifndef _ZCONF_H
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9 #define _ZCONF_H
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10
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11 /*
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12 The library does not install any signal handler. It is recommended to
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13 add at least a handler for SIGSEGV when decompressing; the library checks
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14 the consistency of the input data whenever possible but may go nuts
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15 for some forms of corrupted input.
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16 */
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17
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18 /*
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19 * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
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20 * than 64k bytes at a time (needed on systems with 16-bit int).
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21 */
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22 #if defined(_GNUC__) && !defined(__32BIT__)
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23 # define __32BIT__
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24 #endif
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25 #if defined(__MSDOS__) && !defined(MSDOS)
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26 # define MSDOS
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27 #endif
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28 #if defined(MSDOS) && !defined(__32BIT__)
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29 # define MAXSEG_64K
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30 #endif
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31 #ifdef MSDOS
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32 # define UNALIGNED_OK
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33 #endif
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34
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35 #ifndef STDC
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36 # if defined(MSDOS) || defined(__STDC__) || defined(__cplusplus)
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37 # define STDC
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38 # endif
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39 #endif
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40
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41 #ifndef STDC
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42 # ifndef const
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43 # define const
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44 # endif
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45 #endif
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46
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47 #ifdef __MWERKS__ /* Metrowerks CodeWarrior declares fileno() in unix.h */
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48 # include <unix.h>
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49 #endif
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50
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51 /* Maximum value for memLevel in deflateInit2 */
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52 #ifndef MAX_MEM_LEVEL
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53 # ifdef MAXSEG_64K
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54 # define MAX_MEM_LEVEL 8
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55 # else
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56 # define MAX_MEM_LEVEL 9
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57 # endif
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58 #endif
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59
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60 /* Maximum value for windowBits in deflateInit2 and inflateInit2 */
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61 #ifndef MAX_WBITS
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62 # define MAX_WBITS 15 /* 32K LZ77 window */
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63 #endif
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64
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65 /* The memory requirements for deflate are (in bytes):
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66 1 << (windowBits+2) + 1 << (memLevel+9)
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67 that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
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68 plus a few kilobytes for small objects. For example, if you want to reduce
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69 the default memory requirements from 256K to 128K, compile with
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70 make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
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71 Of course this will generally degrade compression (there's no free lunch).
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72
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73 The memory requirements for inflate are (in bytes) 1 << windowBits
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74 that is, 32K for windowBits=15 (default value) plus a few kilobytes
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75 for small objects.
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76 */
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77
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78 /* Type declarations */
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79
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80 #ifndef OF /* function prototypes */
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81 # ifdef STDC
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82 # define OF(args) args
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83 # else
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84 # define OF(args) ()
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85 # endif
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86 #endif
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87
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88 /* The following definitions for FAR are needed only for MSDOS mixed
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89 * model programming (small or medium model with some far allocations).
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90 * This was tested only with MSC; for other MSDOS compilers you may have
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91 * to define NO_MEMCPY in zutil.h. If you don't need the mixed model,
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92 * just define FAR to be empty.
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93 */
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94 #if defined(M_I86SM) || defined(M_I86MM) /* MSC small or medium model */
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95 # ifdef _MSC_VER
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96 # define FAR __far
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97 # else
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98 # define FAR far
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99 # endif
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100 #endif
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101 #if defined(__BORLANDC__) && (defined(__SMALL__) || defined(__MEDIUM__))
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102 # define FAR __far /* completely untested, just a best guess */
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103 #endif
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104 #ifndef FAR
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105 # define FAR
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106 #endif
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107
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108 typedef unsigned char Byte; /* 8 bits */
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109 typedef unsigned int uInt; /* 16 bits or more */
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110 typedef unsigned long uLong; /* 32 bits or more */
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111
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112 typedef Byte FAR Bytef;
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113 typedef char FAR charf;
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114 typedef int FAR intf;
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115 typedef uInt FAR uIntf;
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116 typedef uLong FAR uLongf;
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117
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118 #ifdef STDC
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119 typedef void FAR *voidpf;
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120 typedef void *voidp;
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121 #else
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122 typedef Byte FAR *voidpf;
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123 typedef Byte *voidp;
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124 #endif
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125
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126 #endif /* _ZCONF_H */
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