14.3. Data Definitions for libz

#define Z_NULL	0
#define ZLIB_VERSION	"1.2.2"
#define MAX_WBITS	15	/* 32K LZ77 window */
#define MAX_MEM_LEVEL	9	/* Maximum value for memLevel in deflateInit2 */
#define deflateInit2(strm,level,method,windowBits,memLevel,strategy)	\
	deflateInit2_((strm),(level),(method),(windowBits),(memLevel),(strategy),ZLIB_VERSION,sizeof(z_stream))
#define deflateInit(strm,level)	\
	deflateInit_((strm), (level),       ZLIB_VERSION, sizeof(z_stream))
#define inflateInit2(strm,windowBits)	\
	inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
#define inflateInit(strm)	\
	inflateInit_((strm),                ZLIB_VERSION, sizeof(z_stream))

typedef char charf;
typedef int intf;

typedef void *voidpf;
typedef unsigned int uInt;
typedef unsigned long int uLong;
typedef uLong uLongf;
typedef void *voidp;
typedef unsigned char Byte;
typedef off_t z_off_t;
typedef void *const voidpc;

typedef voidpf(*alloc_func) (voidpf opaque, uInt items, uInt size);
typedef void (*free_func) (voidpf opaque, voidpf address);
struct internal_state {
    int dummy;
};
typedef Byte Bytef;
typedef uInt uIntf;

typedef struct z_stream_s {
    Bytef *next_in;		/* next input byte */
    uInt avail_in;		/* number of bytes available at next_in */
    uLong total_in;		/* total nb of input bytes read so far */
    Bytef *next_out;		/* next output byte should be put there */
    uInt avail_out;		/* remaining free space at next_out */
    uLong total_out;		/* total nb of bytes output so far */
    char *msg;			/* last error message, NULL if no error */
    struct internal_state *state;	/* not visible by applications */
    alloc_func zalloc;		/* used to allocate the internal state */
    free_func zfree;		/* used to free the internal state */
    voidpf opaque;		/* private data object passed to zalloc and zfree */
    int data_type;		/* best guess about the data type: ascii or binary */
    uLong adler;		/* adler32 value of the uncompressed data */
    uLong reserved;		/* reserved for future use */
} z_stream;

typedef z_stream *z_streamp;
typedef voidp gzFile;

#define Z_NO_FLUSH	0
#define Z_PARTIAL_FLUSH	1
#define Z_SYNC_FLUSH	2
#define Z_FULL_FLUSH	3
#define Z_FINISH	4
#define Z_BLOCK	5

#define Z_ERRNO	(-1)
#define Z_STREAM_ERROR	(-2)
#define Z_DATA_ERROR	(-3)
#define Z_MEM_ERROR	(-4)
#define Z_BUF_ERROR	(-5)
#define Z_VERSION_ERROR	(-6)
#define Z_OK	0
#define Z_STREAM_END	1
#define Z_NEED_DICT	2

#define Z_DEFAULT_COMPRESSION	(-1)
#define Z_NO_COMPRESSION	0
#define Z_BEST_SPEED	1
#define Z_BEST_COMPRESSION	9

#define Z_DEFAULT_STRATEGY	0
#define Z_FILTERED	1
#define Z_HUFFMAN_ONLY	2

#define Z_BINARY	0
#define Z_ASCII	1
#define Z_UNKNOWN	2

#define Z_DEFLATED	8

extern uLong adler32(uLong adler, const Bytef * buf, uInt len);
extern int compress(Bytef * dest, uLongf * destLen, const Bytef * source,
		    uLong sourceLen);
extern int compress2(Bytef * dest, uLongf * destLen, const Bytef * source,
		     uLong sourceLen, int level);
extern uLong compressBound(uLong sourceLen);
extern uLong crc32(uLong crc, const Bytef * buf, uInt len);
extern int deflate(z_streamp strm, int flush);
extern uLong deflateBound(z_streamp strm, uLong sourceLen);
extern int deflateCopy(z_streamp dest, z_streamp source);
extern int deflateEnd(z_streamp strm);
extern int deflateInit2_(z_streamp strm, int level, int method,
			 int windowBits, int memLevel, int strategy,
			 const char *version, int stream_size);
extern int deflateInit_(z_streamp strm, int level, const char *version,
			int stream_size);
extern int deflateParams(z_streamp strm, int level, int strategy);
extern int deflateReset(z_streamp strm);
extern int deflateSetDictionary(z_streamp strm, const Bytef * dictionary,
				uInt dictLength);
extern const uLongf *get_crc_table(void);
extern int gzclose(gzFile file);
extern gzFile gzdopen(int fd, const char *mode);
extern int gzeof(gzFile file);
extern const char *gzerror(gzFile file, int *errnum);
extern int gzflush(gzFile file, int flush);
extern int gzgetc(gzFile file);
extern char *gzgets(gzFile file, char *buf, int len);
extern gzFile gzopen(const char *path, const char *mode);
extern int gzprintf(gzFile file, const char *format, ...);
extern int gzputc(gzFile file, int c);
extern int gzputs(gzFile file, const char *s);
extern int gzread(gzFile file, voidp buf, unsigned int len);
extern int gzrewind(gzFile file);
extern z_off_t gzseek(gzFile file, z_off_t offset, int whence);
extern int gzsetparams(gzFile file, int level, int strategy);
extern z_off_t gztell(gzFile file);
extern int gzwrite(gzFile file, voidpc buf, unsigned int len);
extern int inflate(z_streamp strm, int flush);
extern int inflateEnd(z_streamp strm);
extern int inflateInit2_(z_streamp strm, int windowBits,
			 const char *version, int stream_size);
extern int inflateInit_(z_streamp strm, const char *version,
			int stream_size);
extern int inflateReset(z_streamp strm);
extern int inflateSetDictionary(z_streamp strm, const Bytef * dictionary,
				uInt dictLength);
extern int inflateSync(z_streamp strm);
extern int inflateSyncPoint(z_streamp z);
extern int uncompress(Bytef * dest, uLongf * destLen, const Bytef * source,
		      uLong sourceLen);
extern const char *zError(int);
extern const char *zlibVersion(void);