[pcsx_rearmed.git] / deps / libchdr / deps / zlib-1.3.1 / 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

#ifdef HAVE_HIDDEN
#  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
#else
#  define ZLIB_INTERNAL
#endif

#include <stdio.h>
#include "zlib.h"
#ifdef STDC
#  include <string.h>
#  include <stdlib.h>
#  include <limits.h>
#endif

#ifndef _POSIX_SOURCE
#  define _POSIX_SOURCE
#endif
#include <fcntl.h>

#ifdef _WIN32
#  include <stddef.h>
#endif

#if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32)
#  include <io.h>
#endif

#if defined(_WIN32)
#  define WIDECHAR
#endif

#ifdef WINAPI_FAMILY
#  define open _open
#  define read _read
#  define write _write
#  define close _close
#endif

#ifdef NO_DEFLATE       /* for compatibility with old definition */
#  define NO_GZCOMPRESS
#endif

#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
#  ifndef HAVE_VSNPRINTF
#    define HAVE_VSNPRINTF
#  endif
#endif

#if defined(__CYGWIN__)
#  ifndef HAVE_VSNPRINTF
#    define HAVE_VSNPRINTF
#  endif
#endif

#if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410)
#  ifndef HAVE_VSNPRINTF
#    define HAVE_VSNPRINTF
#  endif
#endif

#ifndef HAVE_VSNPRINTF
#  ifdef MSDOS
/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
   but for now we just assume it doesn't. */
#    define NO_vsnprintf
#  endif
#  ifdef __TURBOC__
#    define NO_vsnprintf
#  endif
#  ifdef WIN32
/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
#    if !defined(vsnprintf) && !defined(NO_vsnprintf)
#      if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
#         define vsnprintf _vsnprintf
#      endif
#    endif
#  endif
#  ifdef __SASC
#    define NO_vsnprintf
#  endif
#  ifdef VMS
#    define NO_vsnprintf
#  endif
#  ifdef __OS400__
#    define NO_vsnprintf
#  endif
#  ifdef __MVS__
#    define NO_vsnprintf
#  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

#ifndef local
#  define local static
#endif
/* since "static" is used to mean two completely different things in C, we
   define "local" for the non-static meaning of "static", for readability
   (compile with -Dlocal if your debugger can't find static symbols) */

/* gz* functions always use library allocation functions */
#ifndef STDC
  extern voidp  malloc(uInt size);
  extern void   free(voidpf ptr);
#endif

/* get errno and strerror definition */
#if defined UNDER_CE
#  include <windows.h>
#  define zstrerror() gz_strwinerror((DWORD)GetLastError())
#else
#  ifndef NO_STRERROR
#    include <errno.h>
#    define zstrerror() strerror(errno)
#  else
#    define zstrerror() "stdio error (consult errno)"
#  endif
#endif

/* provide prototypes for these when building zlib without LFS */
#if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
    ZEXTERN gzFile ZEXPORT gzopen64(const char *, const char *);
    ZEXTERN z_off64_t ZEXPORT gzseek64(gzFile, z_off64_t, int);
    ZEXTERN z_off64_t ZEXPORT gztell64(gzFile);
    ZEXTERN z_off64_t ZEXPORT gzoffset64(gzFile);
#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) */
#define GZBUFSIZE 8192

/* 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) */
    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 */
    z_stream strm;          /* stream structure in-place (not a pointer) */
} gz_state;
typedef gz_state FAR *gz_statep;

/* shared functions */
void ZLIB_INTERNAL gz_error(gz_statep, int, const char *);
#if defined UNDER_CE
char ZLIB_INTERNAL *gz_strwinerror(DWORD error);
#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) */
unsigned ZLIB_INTERNAL gz_intmax(void);
#define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
Commit	Line	Data
b24e7fce	1	/* gzguts.h -- zlib internal header definitions for gz* operations
648db22b	2	* Copyright (C) 2004-2024 Mark Adler
b24e7fce	3	* For conditions of distribution and use, see copyright notice in zlib.h
	4	*/
	5
	6	#ifdef _LARGEFILE64_SOURCE
	7	# ifndef _LARGEFILE_SOURCE
	8	# define _LARGEFILE_SOURCE 1
	9	# endif
648db22b	10	# undef _FILE_OFFSET_BITS
648db22b	11	# undef _TIME_BITS
b24e7fce	12	#endif
	13
	14	#ifdef HAVE_HIDDEN
	15	# define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
	16	#else
	17	# define ZLIB_INTERNAL
	18	#endif
	19
	20	#include <stdio.h>
	21	#include "zlib.h"
	22	#ifdef STDC
	23	# include <string.h>
	24	# include <stdlib.h>
	25	# include <limits.h>
	26	#endif
	27
	28	#ifndef _POSIX_SOURCE
	29	# define _POSIX_SOURCE
	30	#endif
	31	#include <fcntl.h>
	32
	33	#ifdef _WIN32
	34	# include <stddef.h>
	35	#endif
	36
	37	#if defined(__TURBOC__) \|\| defined(_MSC_VER) \|\| defined(_WIN32)
	38	# include <io.h>
	39	#endif
	40
9e052883	41	#if defined(_WIN32)
b24e7fce	42	# define WIDECHAR
	43	#endif
	44
	45	#ifdef WINAPI_FAMILY
	46	# define open _open
	47	# define read _read
	48	# define write _write
	49	# define close _close
	50	#endif
	51
	52	#ifdef NO_DEFLATE /* for compatibility with old definition */
	53	# define NO_GZCOMPRESS
	54	#endif
	55
	56	#if defined(STDC99) \|\| (defined(__TURBOC__) && __TURBOC__ >= 0x550)
	57	# ifndef HAVE_VSNPRINTF
	58	# define HAVE_VSNPRINTF
	59	# endif
	60	#endif
	61
	62	#if defined(__CYGWIN__)
	63	# ifndef HAVE_VSNPRINTF
	64	# define HAVE_VSNPRINTF
	65	# endif
	66	#endif
	67
	68	#if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410)
	69	# ifndef HAVE_VSNPRINTF
	70	# define HAVE_VSNPRINTF
	71	# endif
	72	#endif
	73
	74	#ifndef HAVE_VSNPRINTF
	75	# ifdef MSDOS
	76	/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
	77	but for now we just assume it doesn't. */
	78	# define NO_vsnprintf
	79	# endif
	80	# ifdef __TURBOC__
	81	# define NO_vsnprintf
	82	# endif
	83	# ifdef WIN32
	84	/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
	85	# if !defined(vsnprintf) && !defined(NO_vsnprintf)
	86	# if !defined(_MSC_VER) \|\| ( defined(_MSC_VER) && _MSC_VER < 1500 )
	87	# define vsnprintf _vsnprintf
	88	# endif
	89	# endif
	90	# endif
	91	# ifdef __SASC
	92	# define NO_vsnprintf
	93	# endif
	94	# ifdef VMS
	95	# define NO_vsnprintf
	96	# endif
	97	# ifdef __OS400__
	98	# define NO_vsnprintf
	99	# endif
	100	# ifdef __MVS__
	101	# define NO_vsnprintf
	102	# endif
	103	#endif
	104
	105	/* unlike snprintf (which is required in C99), _snprintf does not guarantee
106	null termination of the result -- however this is only used in gzlib.c where
107	the result is assured to fit in the space provided */
108	#if defined(_MSC_VER) && _MSC_VER < 1900
109	# define snprintf _snprintf
110	#endif
111
112	#ifndef local
113	# define local static
114	#endif
115	/* since "static" is used to mean two completely different things in C, we
116	define "local" for the non-static meaning of "static", for readability
117	(compile with -Dlocal if your debugger can't find static symbols) */
118
119	/* gz* functions always use library allocation functions */
120	#ifndef STDC
648db22b	121	extern voidp malloc(uInt size);
648db22b	122	extern void free(voidpf ptr);
b24e7fce	123	#endif
	124
	125	/* get errno and strerror definition */
	126	#if defined UNDER_CE
	127	# include <windows.h>
	128	# define zstrerror() gz_strwinerror((DWORD)GetLastError())
	129	#else
	130	# ifndef NO_STRERROR
	131	# include <errno.h>
	132	# define zstrerror() strerror(errno)
	133	# else
	134	# define zstrerror() "stdio error (consult errno)"
	135	# endif
	136	#endif
	137
	138	/* provide prototypes for these when building zlib without LFS */
	139	#if !defined(_LARGEFILE64_SOURCE) \|\| _LFS64_LARGEFILE-0 == 0
648db22b	140	ZEXTERN gzFile ZEXPORT gzopen64(const char , const char );
	141	ZEXTERN z_off64_t ZEXPORT gzseek64(gzFile, z_off64_t, int);
	142	ZEXTERN z_off64_t ZEXPORT gztell64(gzFile);
	143	ZEXTERN z_off64_t ZEXPORT gzoffset64(gzFile);
b24e7fce	144	#endif
	145
	146	/* default memLevel */
	147	#if MAX_MEM_LEVEL >= 8
	148	# define DEF_MEM_LEVEL 8
	149	#else
	150	# define DEF_MEM_LEVEL MAX_MEM_LEVEL
	151	#endif
	152
	153	/* default i/o buffer size -- double this for output when reading (this and
	154	twice this must be able to fit in an unsigned type) */
	155	#define GZBUFSIZE 8192
	156
	157	/* gzip modes, also provide a little integrity check on the passed structure */
	158	#define GZ_NONE 0
	159	#define GZ_READ 7247
	160	#define GZ_WRITE 31153
	161	#define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */
	162
	163	/* values for gz_state how */
	164	#define LOOK 0 /* look for a gzip header */
	165	#define COPY 1 /* copy input directly */
	166	#define GZIP 2 /* decompress a gzip stream */
	167
	168	/* internal gzip file state data structure */
	169	typedef struct {
	170	/* exposed contents for gzgetc() macro */
	171	struct gzFile_s x; /* "x" for exposed */
	172	/* x.have: number of bytes available at x.next */
	173	/* x.next: next output data to deliver or write */
	174	/* x.pos: current position in uncompressed data */
	175	/* used for both reading and writing */
	176	int mode; /* see gzip modes above */
	177	int fd; /* file descriptor */
	178	char path; / path or fd for error messages */
	179	unsigned size; /* buffer size, zero if not allocated yet */
	180	unsigned want; /* requested buffer size, default is GZBUFSIZE */
	181	unsigned char in; / input buffer (double-sized when writing) */
	182	unsigned char out; / output buffer (double-sized when reading) */
	183	int direct; /* 0 if processing gzip, 1 if transparent */
	184	/* just for reading */
	185	int how; /* 0: get header, 1: copy, 2: decompress */
	186	z_off64_t start; /* where the gzip data started, for rewinding */
	187	int eof; /* true if end of input file reached */
	188	int past; /* true if read requested past end */
	189	/* just for writing */
	190	int level; /* compression level */
	191	int strategy; /* compression strategy */
9e052883	192	int reset; /* true if a reset is pending after a Z_FINISH */
b24e7fce	193	/* seek request */
	194	z_off64_t skip; /* amount to skip (already rewound if backwards) */
	195	int seek; /* true if seek request pending */
	196	/* error information */
	197	int err; /* error code */
	198	char msg; / error message */
	199	/* zlib inflate or deflate stream */
	200	z_stream strm; /* stream structure in-place (not a pointer) */
	201	} gz_state;
	202	typedef gz_state FAR *gz_statep;
	203
	204	/* shared functions */
648db22b	205	void ZLIB_INTERNAL gz_error(gz_statep, int, const char *);
b24e7fce	206	#if defined UNDER_CE
648db22b	207	char ZLIB_INTERNAL *gz_strwinerror(DWORD error);
b24e7fce	208	#endif
	209
	210	/* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
	211	value -- needed when comparing unsigned to z_off64_t, which is signed
	212	(possible z_off64_t types off_t, off64_t, and long are all signed) */
648db22b	213	unsigned ZLIB_INTERNAL gz_intmax(void);
648db22b	214	#define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())