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Diffstat (limited to 'neozip/gzguts.h')
| -rw-r--r-- | neozip/gzguts.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/neozip/gzguts.h b/neozip/gzguts.h new file mode 100644 index 0000000000..67dc280df7 --- /dev/null +++ b/neozip/gzguts.h @@ -0,0 +1,151 @@ +#ifndef GZGUTS_H_ +#define GZGUTS_H_ +/* gzguts.h -- zlib internal header definitions for gz* operations + * Copyright (C) 2004-2024 Mark Adler + * For conditions of distribution and use, see copyright notice in zlib.h + */ + +#ifdef _LARGEFILE64_SOURCE +# ifndef _LARGEFILE_SOURCE +# define _LARGEFILE_SOURCE 1 +# endif +# undef _FILE_OFFSET_BITS +# undef _TIME_BITS +#endif + +#if defined(HAVE_VISIBILITY_INTERNAL) +# define Z_INTERNAL __attribute__((visibility ("internal"))) +#elif defined(HAVE_VISIBILITY_HIDDEN) +# define Z_INTERNAL __attribute__((visibility ("hidden"))) +#else +# define Z_INTERNAL +#endif + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <limits.h> +#include <fcntl.h> + +#if defined(ZLIB_COMPAT) +# include "zlib.h" +#else +# include "zlib-ng.h" +#endif + +#ifdef _WIN32 +# include <stddef.h> +#endif + +#if defined(_WIN32) +# include <io.h> +# define WIDECHAR +#endif + +#ifdef WINAPI_FAMILY +# define open _open +# define read _read +# define write _write +# define close _close +#endif + +/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ +#if !defined(STDC99) && !defined(__CYGWIN__) && !defined(__MINGW__) && defined(_WIN32) +# if !defined(vsnprintf) +# if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 ) +# define vsnprintf _vsnprintf +# endif +# endif +#endif + +/* unlike snprintf (which is required in C99), _snprintf does not guarantee + null termination of the result -- however this is only used in gzlib.c + where the result is assured to fit in the space provided */ +#if defined(_MSC_VER) && _MSC_VER < 1900 +# define snprintf _snprintf +#endif + +/* get errno and strerror definition */ +#ifndef NO_STRERROR +# include <errno.h> +# define zstrerror() strerror(errno) +#else +# define zstrerror() "stdio error (consult errno)" +#endif + +/* default memLevel */ +#if MAX_MEM_LEVEL >= 8 +# define DEF_MEM_LEVEL 8 +#else +# define DEF_MEM_LEVEL MAX_MEM_LEVEL +#endif + +/* default i/o buffer size -- double this for output when reading (this and + twice this must be able to fit in an unsigned type) */ +#ifndef GZBUFSIZE +# define GZBUFSIZE 131072 +#endif + +/* gzip modes, also provide a little integrity check on the passed structure */ +#define GZ_NONE 0 +#define GZ_READ 7247 +#define GZ_WRITE 31153 +#define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */ + +/* values for gz_state how */ +#define LOOK 0 /* look for a gzip header */ +#define COPY 1 /* copy input directly */ +#define GZIP 2 /* decompress a gzip stream */ + +/* internal gzip file state data structure */ +typedef struct { + /* exposed contents for gzgetc() macro */ + struct gzFile_s x; /* "x" for exposed */ + /* x.have: number of bytes available at x.next */ + /* x.next: next output data to deliver or write */ + /* x.pos: current position in uncompressed data */ + /* used for both reading and writing */ + int mode; /* see gzip modes above */ + int fd; /* file descriptor */ + char *path; /* path or fd for error messages */ + unsigned size; /* buffer size, zero if not allocated yet */ + unsigned want; /* requested buffer size, default is GZBUFSIZE */ + unsigned char *in; /* input buffer (double-sized when writing) */ + unsigned char *out; /* output buffer (double-sized when reading) */ + unsigned char *buffers; /* Pointer to the real input/output buffer allocation */ + int direct; /* 0 if processing gzip, 1 if transparent */ + /* just for reading */ + int how; /* 0: get header, 1: copy, 2: decompress */ + z_off64_t start; /* where the gzip data started, for rewinding */ + int eof; /* true if end of input file reached */ + int past; /* true if read requested past end */ + /* just for writing */ + int level; /* compression level */ + int strategy; /* compression strategy */ + int reset; /* true if a reset is pending after a Z_FINISH */ + /* seek request */ + z_off64_t skip; /* amount to skip (already rewound if backwards) */ + int seek; /* true if seek request pending */ + /* error information */ + int err; /* error code */ + char *msg; /* error message */ + /* zlib inflate or deflate stream */ + PREFIX3(stream) strm; /* stream structure in-place (not a pointer) */ +} gz_state; +typedef gz_state *gz_statep; + +/* shared functions */ +void Z_INTERNAL PREFIX(gz_error)(gz_state *, int, const char *); +int Z_INTERNAL gz_buffer_alloc(gz_state *state); +void Z_INTERNAL gz_buffer_free(gz_state *state); +void Z_INTERNAL gz_state_free(gz_state *state); + +#ifdef ZLIB_COMPAT +unsigned Z_INTERNAL gz_intmax(void); +#endif +/* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t + value -- needed when comparing unsigned to z_off64_t, which is signed + (possible z_off64_t types off_t, off64_t, and long are all signed) */ +#define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX) + +#endif /* GZGUTS_H_ */ |