Initial commit

1 files changed, 212 insertions, 0 deletions

diff --git a/include/compress.h b/include/compress.h
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+++ b/include/compress.h
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+/* compress.h -- definitions for the decompression routines used in CFITSIO */
+
+/* Blatantly copied and modified from the original gzip-1.2.4 source code.  */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+/* 'near' is only relevant for 16-bit PC with small memory model */
+# define near
+
+#if defined(VAXC) || defined(VMS)
+#  define RECORD_IO 1
+#else
+#  define RECORD_IO 0
+#endif
+
+#define get_char() get_byte()
+
+/* gzip.h -- common declarations for all gzip modules  */
+
+#define OF(args)  args
+typedef void *voidp;
+
+#define memzero(s, n)     memset ((voidp)(s), 0, (n))
+
+typedef unsigned char  uch;
+typedef unsigned short ush;
+typedef unsigned long  ulg;
+
+/* Return codes from gzip */
+#define OK      0
+#define ERROR   1
+#define WARNING 2
+
+/* Compression methods (see algorithm.doc) */
+#define STORED      0
+#define COMPRESSED  1
+#define PACKED      2
+#define LZHED       3
+/* methods 4 to 7 reserved */
+#define DEFLATED    8
+#define MAX_METHODS 9
+
+#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	PACK_MAGIC     "\037\036" /* Magic header for packed files */
+#define	GZIP_MAGIC     "\037\213" /* Magic header for gzip files, 1F 8B */
+#define	OLD_GZIP_MAGIC "\037\236" /* Magic header for gzip 0.5 = freeze 1.x */
+#define	LZH_MAGIC      "\037\240" /* Magic header for SCO LZH Compress files*/
+#define	LZW_MAGIC      "\037\235" /* Magic header for lzw files, 1F 9D */
+#define PKZIP_MAGIC    "\120\113\003\004" /* Magic header for pkzip files */
+
+/* gzip flag byte */
+#define ASCII_FLAG   0x01 /* bit 0 set: file probably ascii text */
+#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
+#define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */
+#define ORIG_NAME    0x08 /* bit 3 set: original file name present */
+#define COMMENT      0x10 /* bit 4 set: file comment present */
+#define ENCRYPTED    0x20 /* bit 5 set: file is encrypted */
+#define RESERVED     0xC0 /* bit 6,7:   reserved */
+
+#define MIN_MATCH  3
+#define MAX_MATCH  258
+#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
+#define MAX_DIST  (WSIZE-MIN_LOOKAHEAD)
+#define translate_eol 0  /* no option -a yet */
+
+#define get_byte()  (inptr < insize ? inbuf[inptr++] : fill_inbuf(0))
+#define try_byte()  (inptr < insize ? inbuf[inptr++] : fill_inbuf(1))
+#define put_ubyte(c) {window[outcnt++]=(uch)(c); if (outcnt==WSIZE)\
+   flush_window();}
+
+/* Macros for getting two-byte and four-byte header values */
+#define SH(p) ((ush)(uch)((p)[0]) | ((ush)(uch)((p)[1]) << 8))
+#define LG(p) ((ulg)(SH(p)) | ((ulg)(SH((p)+2)) << 16))
+
+/* Diagnostic functions */
+#  define Assert(cond,msg)
+#  define Trace(x)
+#  define Tracev(x)
+#  define Tracevv(x)
+#  define Tracec(c,x)
+#  define Tracecv(c,x)
+
+/* lzw.h -- define the lzw functions. */
+
+#ifndef BITS
+#  define BITS 16
+#endif
+#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 */
+
+/* prototypes */
+
+#define local static
+void ffpmsg(const char *err_message);
+
+local int  get_method   OF((FILE *in));
+
+local ulg  updcrc        OF((uch *s, unsigned n));
+local int  fill_inbuf    OF((int eof_ok));
+local void flush_outbuf  OF((void));  
+local void flush_window  OF((void));
+local void write_buf     OF((voidp buf, unsigned cnt));
+local void error         OF((char *m));
+local ulg  flush_block OF((char *buf, ulg stored_len, int eof));
+typedef int file_t;     /* Do not use stdio */
+#define NO_FILE  (-1)   /* in memory compression */
+local int file_read  OF((char *buf,  unsigned size));
+local void     send_bits  OF((int value, int length));
+local unsigned bi_reverse OF((unsigned value, int length));
+local void     bi_windup  OF((void));
+local void     copy_block OF((char *buf, unsigned len, int header));
+local int (*read_buf) OF((char *buf, unsigned size));
+local void lm_init OF((int pack_level, ush *flags));
+local ulg  deflate OF((void));
+local void ct_init     OF((ush *attr, int *method));
+local int  ct_tally    OF((int dist, int lc));
+local void bi_init    OF((file_t zipfile));
+
+#define put_byte(c) {outbuf[outcnt++]=(uch)(c); if (outcnt==OUTBUFSIZ)\
+   flush_outbuf();}
+
+/* Output a 16 bit value, lsb first */
+#define put_short(w) \
+{ if (outcnt < OUTBUFSIZ-2) { \
+    outbuf[outcnt++] = (uch) ((w) & 0xff); \
+    outbuf[outcnt++] = (uch) ((ush)(w) >> 8); \
+  } else { \
+    put_byte((uch)((w) & 0xff)); \
+    put_byte((uch)((ush)(w) >> 8)); \
+  } \
+}
+
+/* Output a 32 bit value to the bit stream, lsb first */
+#define put_long(n) { \
+    put_short((n) & 0xffff); \
+    put_short(((ulg)(n)) >> 16); \
+}
+
+#define seekable()    0  /* force sequential output */
+
+/* io.c */
+local void fillbuf      OF((int n));
+local unsigned getbits  OF((int n));
+local void init_getbits OF((void));
+
+/* maketbl.c */
+local void make_table OF((int nchar, uch bitlen[],
+			  int tablebits, ush table[]));
+
+/* huf.c */
+local void read_pt_len      OF((int nn, int nbit, int i_special));
+local void read_c_len       OF((void));
+local unsigned decode_c     OF((void));
+local unsigned decode_p     OF((void));
+local void huf_decode_start OF((void));
+
+/* decode.c */
+local void decode_start OF((void));
+local unsigned  decode  OF((unsigned count, uch buffer[]));
+
+local int unlzh      OF((FILE *in, FILE *out));
+local int unlzw  OF((FILE *in, FILE *out));
+
+local void read_tree  OF((void));
+local void build_tree_unpack OF((void));
+
+local int unpack     OF((FILE *in, FILE *out));
+local int check_zipfile OF((FILE *in));
+local int unzip      OF((FILE *in, FILE *out));
+
+int (*work) OF((FILE *infile, FILE *outfile)) = unzip; /* function to call */
+
+/* inflate.c */
+struct huft {
+  uch e;                /* number of extra bits or operation */
+  uch b;                /* number of bits in this code or subcode */
+  union {
+    ush n;              /* literal, length base, or distance base */
+    struct huft *t;     /* pointer to next level of table */
+  } v;
+};
+
+local int huft_build OF((unsigned *, unsigned, unsigned, ush *, ush *,
+                   struct huft **, int *));
+local int huft_free OF((struct huft *));
+local int inflate_codes OF((struct huft *, struct huft *, int, int));
+local int inflate_stored OF((void));
+local int inflate_fixed OF((void));
+local int inflate_dynamic OF((void));
+local int inflate_block OF((int *));
+local int inflate OF((void));
+
+/*  end of compress.h include file */