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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 04:37:17 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 #if !defined(STDC) && (defined(MSDOS) || defined(__STDC__))
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32 # define STDC
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33 #endif
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34
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35 /* Maximum value for memLevel in deflateInit2 */
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36 #ifndef MAX_MEM_LEVEL
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37 # ifdef MAXSEG_64K
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38 # define MAX_MEM_LEVEL 8
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39 # else
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40 # define MAX_MEM_LEVEL 9
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41 # endif
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42 #endif
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43
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44 /* Maximum value for windowBits in deflateInit2 and inflateInit2 */
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45 #ifndef MAX_WBITS
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46 # define MAX_WBITS 15 /* 32K LZ77 window */
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47 #endif
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48
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49 /* The memory requirements for deflate are (in bytes):
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50 1 << (windowBits+2) + 1 << (memLevel+9)
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51 that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
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52 plus a few kilobytes for small objects. For example, if you want to reduce
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53 the default memory requirements from 256K to 128K, compile with
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54 make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
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55 Of course this will generally degrade compression (there's no free lunch).
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56
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57 The memory requirements for inflate are (in bytes) 1 << windowBits
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58 that is, 32K for windowBits=15 (default value) plus a few kilobytes
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59 for small objects.
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60 */
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61
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62 /* Type declarations */
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63
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64 #ifndef __P /* function prototypes */
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65 # ifdef STDC
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66 # define __P(args) args
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67 # else
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68 # define __P(args) ()
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69 # endif
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70 #endif
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71
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72 #ifndef Byte
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73 typedef unsigned char Byte; /* 8 bits */
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74 #endif
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75 #ifndef uInt
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76 typedef unsigned int uInt; /* 16 bits or more */
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77 #endif
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78 #ifndef uLong
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79 typedef unsigned long uLong; /* 32 bits or more */
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80 #endif
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81 #ifndef voidp
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82 # ifdef STDC
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83 typedef void *voidp;
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84 # else
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85 typedef Byte *voidp;
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86 # endif
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87 #endif
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88
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89 #endif /* _ZCONF_H */
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90
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