/* vi: set sw=4 ts=4: */
-/* gzip.c -- this is a stripped down version of gzip I put into busybox, it does
- * only standard in to standard out with -9 compression. It also requires the
- * zcat module for some important functions.
+/*
+ * Gzip implementation for busybox
+ *
+ * Based on GNU gzip Copyright (C) 1992-1993 Jean-loup Gailly.
+ *
+ * Originally adjusted for busybox by Charles P. Wright <cpw@unix.asb.com>
+ * "this is a stripped down version of gzip I put into busybox, it does
+ * only standard in to standard out with -9 compression. It also requires
+ * the zcat module for some important functions."
+ *
+ * Adjusted further by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * to support files as well as stdin/stdout, and to generally behave itself wrt
+ * command line handling.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
- * Charles P. Wright <cpw@unix.asb.com>
*/
+
#include "internal.h"
-#ifdef BB_GZIP
-//#ifndef BB_ZCAT
-//#error you need zcat to have gzip support!
-//#endif
+/* These defines are very important for BusyBox. Without these,
+ * huge chunks of ram are pre-allocated making the BusyBox bss
+ * size Freaking Huge(tm), which is a bad thing.*/
+#define SMALL_MEM
+#define DYN_ALLOC
+
static const char gzip_usage[] =
"gzip [OPTION]... FILE\n\n"
"\t-c\tWrite output to standard output instead of FILE.gz\n";
-/* 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>
-#if !defined(NO_STRING_H) || defined(STDC_HEADERS)
-# include <string.h>
-# if !defined(STDC_HEADERS) && !defined(NO_MEMORY_H) && !defined(__GNUC__)
-# include <memory.h>
-# endif
-# define memzero(s, n) memset ((voidp)(s), 0, (n))
-#else
-# include <strings.h>
-# define strchr index
-# define strrchr rindex
-# define memcpy(d, s, n) bcopy((s), (d), (n))
-# define memcmp(s1, s2, n) bcmp((s1), (s2), (n))
-# define memzero(s, n) bzero((s), (n))
-#endif
+#include <string.h>
+#define memzero(s, n) memset ((void *)(s), 0, (n))
#ifndef RETSIGTYPE
# define RETSIGTYPE void
#endif
#ifdef DYN_ALLOC
-# define EXTERN(type, array) extern type * near array
-# define DECLARE(type, array, size) type * near array
+# define EXTERN(type, array) extern type * array
+# define DECLARE(type, array, size) type * array
# define ALLOC(type, array, size) { \
- array = (type*)fcalloc((size_t)(((size)+1L)/2), 2*sizeof(type)); \
+ array = (type*)calloc((size_t)(((size)+1L)/2), 2*sizeof(type)); \
if (array == NULL) errorMsg("insufficient memory"); \
}
-# define FREE(array) {if (array != NULL) fcfree(array), array=NULL;}
+# define FREE(array) {if (array != NULL) free(array), array=NULL;}
#else
# define EXTERN(type, array) extern type array[]
# define DECLARE(type, array, size) type array[size]
/* in zip.c: */
-extern int zip OF((int in, int out));
-extern int file_read OF((char *buf, unsigned size));
+extern int zip (int in, int out);
+extern int file_read (char *buf, unsigned size);
/* in unzip.c */
-extern int unzip OF((int in, int out));
-extern int check_zipfile OF((int in));
+extern int unzip (int in, int out);
+extern int check_zipfile (int in);
/* in unpack.c */
-extern int unpack OF((int in, int out));
+extern int unpack (int in, int out);
/* in unlzh.c */
-extern int unlzh OF((int in, int out));
+extern int unlzh (int in, int out);
/* in gzip.c */
-RETSIGTYPE abort_gzip OF((void));
+RETSIGTYPE abort_gzip (void);
/* in deflate.c */
-void lm_init OF((ush * flags));
-ulg deflate OF((void));
+void lm_init (ush * flags);
+ulg deflate (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));
+void ct_init (ush * attr, int *method);
+int ct_tally (int dist, int lc);
+ulg flush_block (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));
+void bi_init (file_t zipfile);
+void send_bits (int value, int length);
+unsigned bi_reverse (unsigned value, int length);
+void bi_windup (void);
+void copy_block (char *buf, unsigned len, int header);
+extern int (*read_buf) (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 *add_envopt OF((int *argcp, char ***argvp, char *env));
-extern void read_error OF((void));
-extern void write_error OF((void));
-extern void display_ratio OF((long num, long den, FILE * file));
+extern int copy (int in, int out);
+extern ulg updcrc (uch * s, unsigned n);
+extern void clear_bufs (void);
+extern int fill_inbuf (int eof_ok);
+extern void flush_outbuf (void);
+extern void flush_window (void);
+extern void write_buf (int fd, void * buf, unsigned cnt);
+extern char *strlwr (char *s);
+extern char *add_envopt (int *argcp, char ***argvp, char *env);
+extern void read_error (void);
+extern void write_error (void);
+extern void display_ratio (long num, long den, FILE * file);
/* in inflate.c */
-extern int inflate OF((void));
+extern int inflate (void);
/* lzw.h -- define the lzw functions.
* Copyright (C) 1992-1993 Jean-loup Gailly.
* are always zero.
*/
-int (*read_buf) OF((char *buf, unsigned size));
+int (*read_buf) (char *buf, unsigned size);
/* Current input function. Set to mem_read for in-memory compression */
/* ===========================================================================
* Prototypes for local functions.
*/
-local void fill_window OF((void));
+local void fill_window (void);
-int longest_match OF((IPos cur_match));
+int longest_match (IPos cur_match);
#ifdef ASMV
-void match_init OF((void)); /* asm code initialization */
+void match_init (void); /* asm code initialization */
#endif
#ifdef DEBUG
-local void check_match OF((IPos start, IPos match, int length));
+local void check_match (IPos start, IPos match, int length);
#endif
/* ===========================================================================
# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#endif
-typedef RETSIGTYPE(*sig_type) OF((int));
+typedef RETSIGTYPE(*sig_type) (int);
#ifndef O_BINARY
# define O_BINARY 0 /* creation mode for open() */
#ifdef NO_OFF_T
typedef long off_t;
-off_t lseek OF((int fd, off_t offset, int whence));
+off_t lseek (int fd, off_t offset, int whence);
#endif
/* Separator for file name parts (see shorten_name()) */
* Local (static) routines in this file.
*/
-local void init_block OF((void));
-local void pqdownheap OF((ct_data near * tree, int k));
-local void gen_bitlen OF((tree_desc near * desc));
-local void gen_codes OF((ct_data near * tree, int max_code));
-local void build_tree OF((tree_desc near * desc));
-local void scan_tree OF((ct_data near * tree, int max_code));
-local void send_tree OF((ct_data near * tree, int max_code));
-local int build_bl_tree OF((void));
-local void send_all_trees OF((int lcodes, int dcodes, int blcodes));
-local void compress_block OF((ct_data near * ltree, ct_data near * dtree));
-local void set_file_type OF((void));
+local void init_block (void);
+local void pqdownheap (ct_data near * tree, int k);
+local void gen_bitlen (tree_desc near * desc);
+local void gen_codes (ct_data near * tree, int max_code);
+local void build_tree (tree_desc near * desc);
+local void scan_tree (ct_data near * tree, int max_code);
+local void send_tree (ct_data near * tree, int max_code);
+local int build_bl_tree (void);
+local void send_all_trees (int lcodes, int dcodes, int blcodes);
+local void compress_block (ct_data near * ltree, ct_data near * dtree);
+local void set_file_type (void);
#ifndef DEBUG
/* Provide missing strspn and strcspn functions. */
-# ifndef __STDC__
-# define const
-# endif
-
-int strspn OF((const char *s, const char *accept));
-int strcspn OF((const char *s, const char *reject));
+int strspn (const char *s, const char *accept);
+int strcspn (const char *s, const char *reject);
/* ========================================================================
* Return the length of the maximum initial segment
isize += (ulg) len;
return (int) len;
}
-#endif
projects / oweals / busybox.git / blobdiff