feat: add gzip and new headers

1 files changed, 344 insertions, 0 deletions

diff --git a/bin/gzip/gzip.h b/bin/gzip/gzip.h
new file mode 100644
index 00000000..e2dcddfc
--- /dev/null
+++ b/bin/gzip/gzip.h
@@ -0,0 +1,344 @@
+/* gzip.h -- common declarations for all gzip modules
+ * Copyright (C) 1992-1993 Jean-loup Gailly.
+ * This is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License, see the file COPYING.
+ */
+
+#if defined(__STDC__) || defined(PROTO)
+#define OF(args) args
+#else
+#define OF(args) ()
+#endif
+
+#ifdef __STDC__
+typedef void *voidp;
+#else
+typedef char *voidp;
+#endif
+
+/* I don't like nested includes, but the string and io functions are used
+ * too often
+ */
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+#define memzero(s, n) memset((voidp)(s), 0, (n))
+
+#define local static
+
+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
+extern int method; /* compression method */
+
+/* To save memory for 16 bit systems, some arrays are overlaid between
+ * the various modules:
+ * deflate:  prev+head   window      d_buf  l_buf  outbuf
+ * unlzw:    tab_prefix  tab_suffix  stack  inbuf  outbuf
+ * inflate:              window             inbuf
+ * unpack:               window             inbuf  prefix_len
+ * unlzh:    left+right  window      c_table inbuf c_len
+ * For compression, input is done in window[]. For decompression, output
+ * is done in window except for unlzw.
+ */
+
+#ifndef INBUFSIZ
+#ifdef SMALL_MEM
+#define INBUFSIZ 0x2000 /* input buffer size */
+#else
+#define INBUFSIZ 0x8000 /* input buffer size */
+#endif
+#endif
+#define INBUF_EXTRA 64 /* required by unlzw() */
+
+#ifndef OUTBUFSIZ
+#ifdef SMALL_MEM
+#define OUTBUFSIZ 8192 /* output buffer size */
+#else
+#define OUTBUFSIZ 16384 /* output buffer size */
+#endif
+#endif
+#define OUTBUF_EXTRA 2048 /* required by unlzw() */
+
+#ifndef DIST_BUFSIZE
+#ifdef SMALL_MEM
+#define DIST_BUFSIZE 0x2000 /* buffer for distances, see trees.c */
+#else
+#define DIST_BUFSIZE 0x8000 /* buffer for distances, see trees.c */
+#endif
+#endif
+
+#ifdef DYN_ALLOC
+#define EXTERN(type, array)	   extern type *near array
+#define DECLARE(type, array, size) type *near array
+#define ALLOC(type, array, size)                                     \
+	{                                                            \
+		array = (type *)fcalloc((size_t)(((size) + 1L) / 2), \
+					2 * sizeof(type));           \
+		if (array == NULL)                                   \
+			error("insufficient memory");                \
+	}
+#define FREE(array)                                  \
+	{                                            \
+		if (array != NULL)                   \
+			fcfree(array), array = NULL; \
+	}
+#else
+#define EXTERN(type, array)	   extern type array[]
+#define DECLARE(type, array, size) type array[size]
+#define ALLOC(type, array, size)
+#define FREE(array)
+#endif
+
+EXTERN(uch, inbuf);  /* input buffer */
+EXTERN(uch, outbuf); /* output buffer */
+EXTERN(ush, d_buf);  /* buffer for distances, see trees.c */
+EXTERN(uch, window); /* Sliding window and suffix table (unlzw) */
+#define tab_suffix window
+#ifndef MAXSEG_64K
+#define tab_prefix prev		  /* hash link (see deflate.c) */
+#define head	   (prev + WSIZE) /* hash head (see deflate.c) */
+EXTERN(ush, tab_prefix);	  /* prefix code (see unlzw.c) */
+#else
+#define tab_prefix0 prev
+#define head	    tab_prefix1
+EXTERN(ush, tab_prefix0); /* prefix for even codes */
+EXTERN(ush, tab_prefix1); /* prefix for odd  codes */
+#endif
+
+extern unsigned insize; /* valid bytes in inbuf */
+extern unsigned inptr;	/* index of next byte to be processed in inbuf */
+extern unsigned outcnt; /* bytes in output buffer */
+
+extern long bytes_in;	  /* number of input bytes */
+extern long bytes_out;	  /* number of output bytes */
+extern long header_bytes; /* number of bytes in gzip header */
+
+#define isize bytes_in
+/* for compatibility with old zip sources (to be cleaned) */
+
+extern int ifd;	       /* input file descriptor */
+extern int ofd;	       /* output file descriptor */
+extern char ifname[];  /* input file name or "stdin" */
+extern char ofname[];  /* output file name or "stdout" */
+extern char *progname; /* program name */
+
+extern time_t time_stamp; /* original time stamp (modification time) */
+extern long ifile_size;	  /* input file size, -1 for devices (debug only) */
+
+typedef int file_t;  /* Do not use stdio */
+#define NO_FILE (-1) /* in memory compression */
+
+#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 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 */
+
+/* internal file attribute */
+#define UNKNOWN 0xffff
+#define BINARY	0
+#define ASCII	1
+
+#ifndef WSIZE
+#define WSIZE 0x8000 /* window size--must be a power of two, and */
+#endif		     /*  at least 32K for zip's deflate method */
+
+#define MIN_MATCH 3
+#define MAX_MATCH 258
+/* The minimum and maximum match lengths */
+
+#define MIN_LOOKAHEAD (MAX_MATCH + MIN_MATCH + 1)
+/* Minimum amount of lookahead, except at the end of the input file.
+ * See deflate.c for comments about the MIN_MATCH+1.
+ */
+
+#define MAX_DIST (WSIZE - MIN_LOOKAHEAD)
+/* In order to simplify the code, particularly on 16 bit machines, match
+ * distances are limited to MAX_DIST instead of WSIZE.
+ */
+
+extern int decrypt;	   /* flag to turn on decryption */
+extern int exit_code;	   /* program exit code */
+extern int verbose;	   /* be verbose (-v) */
+extern int quiet;	   /* be quiet (-q) */
+extern int level;	   /* compression level */
+extern int test;	   /* check .z file integrity */
+extern int to_stdout;	   /* output to stdout (-c) */
+extern int save_orig_name; /* set if original name must be saved */
+
+#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf(0))
+#define try_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf(1))
+
+/* put_byte is used for the compressed output, put_ubyte for the
+ * uncompressed output. However unlzw() uses window for its
+ * suffix table instead of its output buffer, so it does not use put_ubyte
+ * (to be cleaned up).
+ */
+#define put_byte(c)                          \
+	{                                    \
+		outbuf[outcnt++] = (uch)(c); \
+		if (outcnt == OUTBUFSIZ)     \
+			flush_outbuf();      \
+	}
+#define put_ubyte(c)                         \
+	{                                    \
+		window[outcnt++] = (uch)(c); \
+		if (outcnt == WSIZE)         \
+			flush_window();      \
+	}
+
+/* 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 */
+#define translate_eol 0 /* no option -a yet */
+
+#define tolow(c)                                                    \
+	(isupper(c) ? (c) - 'A' + 'a' : (c)) /* force to lower case \
+					      */
+
+/* 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 */
+#ifdef DEBUG
+#define Assert(cond, msg)           \
+	{                           \
+		if (!(cond))        \
+			error(msg); \
+	}
+#define Trace(x) fprintf x
+#define Tracev(x)                  \
+	{                          \
+		if (verbose)       \
+			fprintf x; \
+	}
+#define Tracevv(x)                 \
+	{                          \
+		if (verbose > 1)   \
+			fprintf x; \
+	}
+#define Tracec(c, x)                \
+	{                           \
+		if (verbose && (c)) \
+			fprintf x;  \
+	}
+#define Tracecv(c, x)                   \
+	{                               \
+		if (verbose > 1 && (c)) \
+			fprintf x;      \
+	}
+#else
+#define Assert(cond, msg)
+#define Trace(x)
+#define Tracev(x)
+#define Tracevv(x)
+#define Tracec(c, x)
+#define Tracecv(c, x)
+#endif
+
+#define WARN(msg)                            \
+	{                                    \
+		if (!quiet)                  \
+			fprintf msg;         \
+		if (exit_code == OK)         \
+			exit_code = WARNING; \
+	}
+
+/* in zip.c: */
+extern int zip OF((int in, int out));
+extern int file_read OF((char *buf, unsigned size));
+
+/* in unzip.c */
+extern int unzip OF((int in, int out));
+extern int check_zipfile OF((int in));
+
+/* in gzip.c */
+void abort_gzip OF((void));
+
+/* in deflate.c */
+void lm_init OF((int pack_level, ush *flags));
+ulg deflate OF((void));
+
+/* in trees.c */
+void ct_init OF((ush * attr, int *method));
+int ct_tally OF((int dist, int lc));
+ulg flush_block OF((char *buf, ulg stored_len, int eof));
+
+/* in bits.c */
+void bi_init OF((file_t zipfile));
+void send_bits OF((int value, int length));
+unsigned bi_reverse OF((unsigned value, int length));
+void bi_windup OF((void));
+void copy_block OF((char *buf, unsigned len, int header));
+extern int(*read_buf) OF((char *buf, unsigned size));
+
+/* in util.c: */
+extern int copy OF((int in, int out));
+extern ulg updcrc OF((uch * s, unsigned n));
+extern void clear_bufs OF((void));
+extern int fill_inbuf OF((int eof_ok));
+extern void flush_outbuf OF((void));
+extern void flush_window OF((void));
+extern void write_buf OF((int fd, voidp buf, unsigned cnt));
+extern char *strlwr OF((char *s));
+extern char *basename OF((char *fname));
+extern void make_simple_name OF((char *name));
+extern char *add_envopt OF((int *argcp, char ***argvp, char *env));
+extern void error OF((char *m));
+extern void warn OF((char *a, char *b));
+extern void read_error OF((void));
+extern void write_error OF((void));
+extern void display_ratio OF((long num, long den, FILE *file));
+extern voidp xmalloc OF((unsigned int size));
+
+/* in inflate.c */
+extern int inflate OF((void));
+
+/* stuff from lzw.h */
+#ifndef BITS
+#define BITS 16
+#endif