security/nss/lib/zlib/gzguts.h@b8a032363ba2 (annotated)
security/nss/lib/zlib/gzguts.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* gzguts.h -- zlib internal header definitions for gz* operations |
| michael@0 | 2 | * Copyright (C) 2004, 2005, 2010 Mark Adler |
| michael@0 | 3 | * For conditions of distribution and use, see copyright notice in zlib.h |
| michael@0 | 4 | */ |
| michael@0 | 5 | |
| michael@0 | 6 | #ifdef _LARGEFILE64_SOURCE |
| michael@0 | 7 | # ifndef _LARGEFILE_SOURCE |
| michael@0 | 8 | # define _LARGEFILE_SOURCE 1 |
| michael@0 | 9 | # endif |
| michael@0 | 10 | # ifdef _FILE_OFFSET_BITS |
| michael@0 | 11 | # undef _FILE_OFFSET_BITS |
| michael@0 | 12 | # endif |
| michael@0 | 13 | #endif |
| michael@0 | 14 | |
| michael@0 | 15 | #if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) && !defined(NO_VIZ) |
| michael@0 | 16 | # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) |
| michael@0 | 17 | #else |
| michael@0 | 18 | # define ZLIB_INTERNAL |
| michael@0 | 19 | #endif |
| michael@0 | 20 | |
| michael@0 | 21 | #include <stdio.h> |
| michael@0 | 22 | #include "zlib.h" |
| michael@0 | 23 | #ifdef STDC |
| michael@0 | 24 | # include <string.h> |
| michael@0 | 25 | # include <stdlib.h> |
| michael@0 | 26 | # include <limits.h> |
| michael@0 | 27 | #endif |
| michael@0 | 28 | #include <fcntl.h> |
| michael@0 | 29 | |
| michael@0 | 30 | #ifdef NO_DEFLATE /* for compatibility with old definition */ |
| michael@0 | 31 | # define NO_GZCOMPRESS |
| michael@0 | 32 | #endif |
| michael@0 | 33 | |
| michael@0 | 34 | #ifdef _MSC_VER |
| michael@0 | 35 | # include <io.h> |
| michael@0 | 36 | # define vsnprintf _vsnprintf |
| michael@0 | 37 | #endif |
| michael@0 | 38 | |
| michael@0 | 39 | #ifndef local |
| michael@0 | 40 | # define local static |
| michael@0 | 41 | #endif |
| michael@0 | 42 | /* compile with -Dlocal if your debugger can't find static symbols */ |
| michael@0 | 43 | |
| michael@0 | 44 | /* gz* functions always use library allocation functions */ |
| michael@0 | 45 | #ifndef STDC |
| michael@0 | 46 | extern voidp malloc OF((uInt size)); |
| michael@0 | 47 | extern void free OF((voidpf ptr)); |
| michael@0 | 48 | #endif |
| michael@0 | 49 | |
| michael@0 | 50 | /* get errno and strerror definition */ |
| michael@0 | 51 | #if defined UNDER_CE |
| michael@0 | 52 | # include <windows.h> |
| michael@0 | 53 | # define zstrerror() gz_strwinerror((DWORD)GetLastError()) |
| michael@0 | 54 | #else |
| michael@0 | 55 | # ifdef STDC |
| michael@0 | 56 | # include <errno.h> |
| michael@0 | 57 | # define zstrerror() strerror(errno) |
| michael@0 | 58 | # else |
| michael@0 | 59 | # define zstrerror() "stdio error (consult errno)" |
| michael@0 | 60 | # endif |
| michael@0 | 61 | #endif |
| michael@0 | 62 | |
| michael@0 | 63 | /* provide prototypes for these when building zlib without LFS */ |
| michael@0 | 64 | #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0 |
| michael@0 | 65 | ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); |
| michael@0 | 66 | ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); |
| michael@0 | 67 | ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); |
| michael@0 | 68 | ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); |
| michael@0 | 69 | #endif |
| michael@0 | 70 | |
| michael@0 | 71 | /* default i/o buffer size -- double this for output when reading */ |
| michael@0 | 72 | #define GZBUFSIZE 8192 |
| michael@0 | 73 | |
| michael@0 | 74 | /* gzip modes, also provide a little integrity check on the passed structure */ |
| michael@0 | 75 | #define GZ_NONE 0 |
| michael@0 | 76 | #define GZ_READ 7247 |
| michael@0 | 77 | #define GZ_WRITE 31153 |
| michael@0 | 78 | #define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */ |
| michael@0 | 79 | |
| michael@0 | 80 | /* values for gz_state how */ |
| michael@0 | 81 | #define LOOK 0 /* look for a gzip header */ |
| michael@0 | 82 | #define COPY 1 /* copy input directly */ |
| michael@0 | 83 | #define GZIP 2 /* decompress a gzip stream */ |
| michael@0 | 84 | |
| michael@0 | 85 | /* internal gzip file state data structure */ |
| michael@0 | 86 | typedef struct { |
| michael@0 | 87 | /* used for both reading and writing */ |
| michael@0 | 88 | int mode; /* see gzip modes above */ |
| michael@0 | 89 | int fd; /* file descriptor */ |
| michael@0 | 90 | char *path; /* path or fd for error messages */ |
| michael@0 | 91 | z_off64_t pos; /* current position in uncompressed data */ |
| michael@0 | 92 | unsigned size; /* buffer size, zero if not allocated yet */ |
| michael@0 | 93 | unsigned want; /* requested buffer size, default is GZBUFSIZE */ |
| michael@0 | 94 | unsigned char *in; /* input buffer */ |
| michael@0 | 95 | unsigned char *out; /* output buffer (double-sized when reading) */ |
| michael@0 | 96 | unsigned char *next; /* next output data to deliver or write */ |
| michael@0 | 97 | /* just for reading */ |
| michael@0 | 98 | unsigned have; /* amount of output data unused at next */ |
| michael@0 | 99 | int eof; /* true if end of input file reached */ |
| michael@0 | 100 | z_off64_t start; /* where the gzip data started, for rewinding */ |
| michael@0 | 101 | z_off64_t raw; /* where the raw data started, for seeking */ |
| michael@0 | 102 | int how; /* 0: get header, 1: copy, 2: decompress */ |
| michael@0 | 103 | int direct; /* true if last read direct, false if gzip */ |
| michael@0 | 104 | /* just for writing */ |
| michael@0 | 105 | int level; /* compression level */ |
| michael@0 | 106 | int strategy; /* compression strategy */ |
| michael@0 | 107 | /* seek request */ |
| michael@0 | 108 | z_off64_t skip; /* amount to skip (already rewound if backwards) */ |
| michael@0 | 109 | int seek; /* true if seek request pending */ |
| michael@0 | 110 | /* error information */ |
| michael@0 | 111 | int err; /* error code */ |
| michael@0 | 112 | char *msg; /* error message */ |
| michael@0 | 113 | /* zlib inflate or deflate stream */ |
| michael@0 | 114 | z_stream strm; /* stream structure in-place (not a pointer) */ |
| michael@0 | 115 | } gz_state; |
| michael@0 | 116 | typedef gz_state FAR *gz_statep; |
| michael@0 | 117 | |
| michael@0 | 118 | /* shared functions */ |
| michael@0 | 119 | void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *)); |
| michael@0 | 120 | #if defined UNDER_CE |
| michael@0 | 121 | char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error)); |
| michael@0 | 122 | #endif |
| michael@0 | 123 | |
| michael@0 | 124 | /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t |
| michael@0 | 125 | value -- needed when comparing unsigned to z_off64_t, which is signed |
| michael@0 | 126 | (possible z_off64_t types off_t, off64_t, and long are all signed) */ |
| michael@0 | 127 | #ifdef INT_MAX |
| michael@0 | 128 | # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX) |
| michael@0 | 129 | #else |
| michael@0 | 130 | unsigned ZLIB_INTERNAL gz_intmax OF((void)); |
| michael@0 | 131 | # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax()) |
| michael@0 | 132 | #endif |
