| 1 | /* minigzip.c -- simulate gzip using the zlib compression library
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| 2 | * Copyright (C) 1995-2002 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 | /*
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| 7 | * minigzip is a minimal implementation of the gzip utility. This is
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| 8 | * only an example of using zlib and isn't meant to replace the
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| 9 | * full-featured gzip. No attempt is made to deal with file systems
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| 10 | * limiting names to 14 or 8+3 characters, etc... Error checking is
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| 11 | * very limited. So use minigzip only for testing; use gzip for the
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| 12 | * real thing. On MSDOS, use only on file names without extension
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| 13 | * or in pipe mode.
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| 14 | */
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| 15 |
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| 16 | /* @(#) $Id: minigzip.c,v 1.1.1.2 2002/03/11 21:53:26 tromey Exp $ */
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| 17 |
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| 18 | #include <stdio.h>
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| 19 | #include "zlib.h"
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| 20 |
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| 21 | #ifdef STDC
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| 22 | # include <string.h>
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| 23 | # include <stdlib.h>
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| 24 | #else
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| 25 | extern void exit OF((int));
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| 26 | #endif
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| 27 |
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| 28 | #ifdef USE_MMAP
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| 29 | # include <sys/types.h>
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| 30 | # include <sys/mman.h>
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| 31 | # include <sys/stat.h>
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| 32 | #endif
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| 33 |
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| 34 | #if defined(MSDOS) || defined(OS2) || defined(WIN32)
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| 35 | # include <fcntl.h>
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| 36 | # include <io.h>
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| 37 | # define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
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| 38 | #else
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| 39 | # define SET_BINARY_MODE(file)
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| 40 | #endif
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| 41 |
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| 42 | #ifdef VMS
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| 43 | # define unlink delete
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| 44 | # define GZ_SUFFIX "-gz"
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| 45 | #endif
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| 46 | #ifdef RISCOS
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| 47 | # define unlink remove
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| 48 | # define GZ_SUFFIX "-gz"
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| 49 | # define fileno(file) file->__file
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| 50 | #endif
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| 51 | #if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
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| 52 | # include <unix.h> /* for fileno */
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| 53 | #endif
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| 54 |
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| 55 | #ifndef WIN32 /* unlink already in stdio.h for WIN32 */
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| 56 | extern int unlink OF((const char *));
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| 57 | #endif
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| 58 |
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| 59 | #ifndef GZ_SUFFIX
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| 60 | # define GZ_SUFFIX ".gz"
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| 61 | #endif
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| 62 | #define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1)
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| 63 |
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| 64 | #define BUFLEN 16384
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| 65 | #define MAX_NAME_LEN 1024
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| 66 |
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| 67 | #ifdef MAXSEG_64K
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| 68 | # define local static
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| 69 | /* Needed for systems with limitation on stack size. */
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| 70 | #else
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| 71 | # define local
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| 72 | #endif
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| 73 |
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| 74 | char *prog;
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| 75 |
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| 76 | void error OF((const char *msg));
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| 77 | void gz_compress OF((FILE *in, gzFile out));
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| 78 | #ifdef USE_MMAP
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| 79 | int gz_compress_mmap OF((FILE *in, gzFile out));
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| 80 | #endif
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| 81 | void gz_uncompress OF((gzFile in, FILE *out));
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| 82 | void file_compress OF((char *file, char *mode));
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| 83 | void file_uncompress OF((char *file));
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| 84 | int main OF((int argc, char *argv[]));
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| 85 |
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| 86 | /* ===========================================================================
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| 87 | * Display error message and exit
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| 88 | */
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| 89 | void error(msg)
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| 90 | const char *msg;
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| 91 | {
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| 92 | fprintf(stderr, "%s: %s\n", prog, msg);
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| 93 | exit(1);
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| 94 | }
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| 95 |
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| 96 | /* ===========================================================================
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| 97 | * Compress input to output then close both files.
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| 98 | */
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