zuncompress.c File Reference

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>

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Data Structures
union	bytes

Macros
#define	get_char()   get_byte()
#define	OF(args)   args
#define	memzero(s, n)    memset ((voidp)(s), 0, (n))
#define	MINZIP(a, b)   ((a) <= (b) ? (a) : (b))
#define	OK   0
#define	ERROR   1
#define	COMPRESSED   1
#define	DEFLATED   8
#define	INBUFSIZ   0x8000 /* input buffer size */
#define	INBUF_EXTRA   64 /* required by unlzw() */
#define	OUTBUFSIZ   16384 /* output buffer size */
#define	OUTBUF_EXTRA   2048 /* required by unlzw() */
#define	DIST_BUFSIZE   0x8000 /* buffer for distances, see trees.c */
#define	WSIZE   0x8000 /* window size--must be a power of two, and */
#define	DECLARE(type, array, size)   type array[size]
#define	tab_suffix   window
#define	tab_prefix   prev /* hash link (see deflate.c) */
#define	head   (prev+WSIZE) /* hash head (see deflate.c) */
#define	LZW_MAGIC   "\037\235" /* Magic header for lzw files, 1F 9D */
#define	get_byte()   (inptr < insize ? inbuf[inptr++] : fill_inbuf(0))
#define	Assert(cond, msg)
#define	Trace(x)
#define	Tracev(x)
#define	Tracevv(x)
#define	Tracec(c, x)
#define	Tracecv(c, x)
#define	BITS   16
#define	INIT_BITS   9 /* Initial number of bits per code */
#define	BIT_MASK   0x1f /* Mask for 'number of compression bits' */
#define	BLOCK_MODE   0x80
#define	LZW_RESERVED   0x60 /* reserved bits */
#define	CLEAR   256 /* flush the dictionary */
#define	FIRST   (CLEAR+1) /* first free entry */
#define	local   static
#define	MAXCODE(n)   (1L << (n))
#define	REGISTERS   2
#define	REG1
#define	REG2
#define	REG3
#define	REG4
#define	REG5
#define	REG6
#define	REG7
#define	REG8
#define	REG9
#define	REG10
#define	REG11
#define	REG12
#define	REG13
#define	REG14
#define	REG15
#define	REG16
#define	REG1   register
#define	REG2   register
#define	BYTEORDER   0000
#define	NOALLIGN   0
#define	input(b, o, c, n, m)
#define	tab_prefixof(i)   tab_prefix[i]
#define	clear_tab_prefixof()   memzero(tab_prefix, 256);
#define	de_stack   ((char_type *)(&d_buf[DIST_BUFSIZE-1]))
#define	tab_suffixof(i)   tab_suffix[i]

Typedefs
typedef void *	voidp
typedef unsigned char	uch
typedef unsigned short	ush
typedef unsigned long	ulg
typedef int	file_t
typedef unsigned char	char_type
typedef long	code_int
typedef unsigned long	count_int
typedef unsigned short	count_short
typedef unsigned long	cmp_code_int

Functions
void	ffpmsg (const char *err_message)
local int fill_inbuf	OF ((int eof_ok))
local void write_buf	OF ((voidp buf, unsigned cnt))
local void error	OF ((char *m))
local int unlzw	OF ((FILE *in, FILE *out))
int work	OF ((FILE *infile, FILE *outfile))
int	zuncompress2mem (char *filename, FILE *diskfile, char **buffptr, size_t *buffsize, void *(*mem_realloc)(void *p, size_t newsize), size_t *filesize, int *status)
local int	unlzw (FILE *in, FILE *out)
local int	fill_inbuf (int eof_ok)
local void	write_buf (voidp buf, unsigned cnt)
local void	error (char *m)

Variables
void *(*	realloc_fn )(void *p, size_t newsize)
int	block_mode = BLOCK_MODE

Macro Definition Documentation

#define Assert	(		cond,
			msg
	)

#define BIT_MASK   0x1f /* Mask for 'number of compression bits' */

#define BITS   16

#define BLOCK_MODE   0x80

#define BYTEORDER   0000

#define CLEAR   256 /* flush the dictionary */

#define clear_tab_prefixof

(

)

memzero(tab_prefix, 256);

#define COMPRESSED   1

#define de_stack   ((char_type *)(&d_buf[DIST_BUFSIZE-1]))

#define DECLARE	(		type,
			array,
			size
	)		type array[size]

#define DEFLATED   8

#define DIST_BUFSIZE   0x8000 /* buffer for distances, see trees.c */

#define ERROR   1

#define FIRST   (CLEAR+1) /* first free entry */

#define get_byte

(

)

(inptr < insize ? inbuf[inptr++] : fill_inbuf(0))

#define get_char

(

)

get_byte()

#define head   (prev+WSIZE) /* hash head (see deflate.c) */

#define INBUF_EXTRA   64 /* required by unlzw() */

#define INBUFSIZ   0x8000 /* input buffer size */

#define INIT_BITS   9 /* Initial number of bits per code */

#define input	(		b,
			o,
			c,
			n,
			m
	)

Value:

{ \
     REG1 char_type *p = &(b)[(o)>>3]; \
     (c) = ((((long)(p[0]))|((long)(p[1])<<8)| \
     ((long)(p[2])<<16))>>((o)&0x7))&(m); \
     (o) += (n); \
   }

#define local   static

#define LZW_MAGIC   "\037\235" /* Magic header for lzw files, 1F 9D */

#define LZW_RESERVED   0x60 /* reserved bits */

#define MAXCODE

(

n

)

(1L << (n))

#define memzero	(		s,
			n
	)		memset ((voidp)(s), 0, (n))

#define MINZIP	(		a,
			b
	)		((a) <= (b) ? (a) : (b))

#define NOALLIGN   0

#define OF

(

args

)

args

#define OK   0

#define OUTBUF_EXTRA   2048 /* required by unlzw() */

#define OUTBUFSIZ   16384 /* output buffer size */

#define REG1

#define REG1   register

#define REG10

#define REG11

#define REG12

#define REG13

#define REG14

#define REG15

#define REG16

#define REG2

#define REG2   register

#define REG3

#define REG4

#define REG5

#define REG6

#define REG7

#define REG8

#define REG9

#define REGISTERS   2

#define tab_prefix   prev /* hash link (see deflate.c) */

#define tab_prefixof

(

i

)

tab_prefix[i]

#define tab_suffix   window

#define tab_suffixof

(

i

)

tab_suffix[i]

#define Trace

(

x

)

#define Tracec	(		c,
			x
	)

#define Tracecv	(		c,
			x
	)

#define Tracev

(

x

)

#define Tracevv

(

x

)

#define WSIZE   0x8000 /* window size--must be a power of two, and */

Typedef Documentation

typedef unsigned char char_type

typedef unsigned long cmp_code_int

typedef long code_int

typedef unsigned long count_int

typedef unsigned short count_short

typedef int file_t

typedef unsigned char uch

typedef unsigned long ulg

typedef unsigned short ush

typedef void* voidp

Function Documentation

local void error

(

char *

m

)

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void ffpmsg

(

const char *

err_message

)

put message on to error stack

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local int fill_inbuf

(

int

eof_ok

)

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local int fill_inbuf OF

(

(int eof_ok)

)

local void write_buf OF

(

(voidp buf, unsigned cnt)

)

local void error OF

(

(char *m)

)

local int unlzw OF

(

(FILE *in, FILE *out)

)

int work OF

(

(FILE *infile, FILE *outfile)

)

local int unlzw	(	FILE *	in,
		FILE *	out
	)

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local void write_buf	(	voidp	buf,
		unsigned	cnt
	)

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int zuncompress2mem	(	char *	filename,
		FILE *	diskfile,
		char **	buffptr,
		size_t *	buffsize,
		void *(*)(void *p, size_t newsize)	mem_realloc,
		size_t *	filesize,
		int *	status
	)

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Variable Documentation

int block_mode = BLOCK_MODE

void*(* realloc_fn) (void *p, size_t newsize)