diff options
Diffstat (limited to 'archival/gzip.c')
| -rw-r--r-- | archival/gzip.c | 125 |
1 files changed, 55 insertions, 70 deletions
diff --git a/archival/gzip.c b/archival/gzip.c index 2a5288c..10eda7a 100644 --- a/archival/gzip.c +++ b/archival/gzip.c @@ -15,21 +15,6 @@ * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ -/* big objects in bss: - * 00000020 b bl_count - * 00000074 b base_length - * 00000078 b base_dist - * 00000078 b static_dtree - * 0000009c b bl_tree - * 000000f4 b dyn_dtree - * 00000100 b length_code - * 00000200 b dist_code - * 0000023d b depth - * 00000400 b flag_buf - * 0000047a b heap - * 00000480 b static_ltree - * 000008f4 b dyn_ltree - */ /* TODO: full support for -v for DESKTOP * "/usr/bin/gzip -v a bogus aa" should say: a: 85.1% -- replaced with a.gz @@ -351,6 +336,44 @@ struct globals { unsigned match_start; /* start of matching string */ unsigned lookahead; /* number of valid bytes ahead in window */ +/* number of input bytes */ + ulg isize; /* only 32 bits stored in .gz file */ + +/* bbox always use stdin/stdout */ +#define ifd STDIN_FILENO /* input file descriptor */ +#define ofd STDOUT_FILENO /* output file descriptor */ + +#ifdef DEBUG + unsigned insize; /* valid bytes in l_buf */ +#endif + unsigned outcnt; /* bytes in output buffer */ + + smallint eofile; /* flag set at end of input file */ + +/* =========================================================================== + * Local data used by the "bit string" routines. + */ + + unsigned short bi_buf; + +/* Output buffer. bits are inserted starting at the bottom (least significant + * bits). + */ +#undef BUF_SIZE +#define BUF_SIZE (8 * sizeof(G1.bi_buf)) + +/* Number of bits used within bi_buf. (bi_buf might be implemented on + * more than 16 bits on some systems.) + */ + int bi_valid; + +#ifdef DEBUG + ulg bits_sent; /* bit length of the compressed data */ +#endif + + /*uint32_t *crc_32_tab;*/ + uint32_t crc; /* shift register contents */ + /* =========================================================================== */ #define DECLARE(type, array, size) \ @@ -390,47 +413,6 @@ struct globals { /* Heads of the hash chains or 0. */ /* DECLARE(Pos, head, 1<<HASH_BITS); */ #define head (G1.prev + WSIZE) /* hash head (see deflate.c) */ - -/* number of input bytes */ - ulg isize; /* only 32 bits stored in .gz file */ - -/* bbox always use stdin/stdout */ -#define ifd STDIN_FILENO /* input file descriptor */ -#define ofd STDOUT_FILENO /* output file descriptor */ - -#ifdef DEBUG - unsigned insize; /* valid bytes in l_buf */ -#endif - unsigned outcnt; /* bytes in output buffer */ - - smallint eofile; /* flag set at end of input file */ - -/* =========================================================================== - * Local data used by the "bit string" routines. - */ - - unsigned short bi_buf; - -/* Output buffer. bits are inserted starting at the bottom (least significant - * bits). - */ - -#undef BUF_SIZE -#define BUF_SIZE (8 * sizeof(G1.bi_buf)) -/* Number of bits used within bi_buf. (bi_buf might be implemented on - * more than 16 bits on some systems.) - */ - - int bi_valid; - -/* Current input function. Set to mem_read for in-memory compression */ - -#ifdef DEBUG - ulg bits_sent; /* bit length of the compressed data */ -#endif - - /*uint32_t *crc_32_tab;*/ - uint32_t crc; /* shift register contents */ }; #define G1 (*(ptr_to_globals - 1)) @@ -1816,7 +1798,7 @@ do { \ head[G1.ins_h] = (s); \ } while (0) -static ulg deflate(void) +static NOINLINE ulg deflate(void) { IPos hash_head; /* head of hash chain */ IPos prev_match; /* previous match */ @@ -1927,10 +1909,10 @@ static ulg deflate(void) */ static void bi_init(void) { - G1.bi_buf = 0; - G1.bi_valid = 0; + //G1.bi_buf = 0; // globals are zeroed in pack_gzip() + //G1.bi_valid = 0; // globals are zeroed in pack_gzip() #ifdef DEBUG - G1.bits_sent = 0L; + //G1.bits_sent = 0L; // globals are zeroed in pack_gzip() #endif } @@ -1950,8 +1932,8 @@ static void lm_init(ush * flagsp) *flagsp |= 2; /* FAST 4, SLOW 2 */ /* ??? reduce max_chain_length for binary files */ - G1.strstart = 0; - G1.block_start = 0L; + //G1.strstart = 0; // globals are zeroed in pack_gzip() + //G1.block_start = 0L; // globals are zeroed in pack_gzip() G1.lookahead = file_read(G1.window, sizeof(int) <= 2 ? (unsigned) WSIZE : 2 * WSIZE); @@ -1961,14 +1943,15 @@ static void lm_init(ush * flagsp) G1.lookahead = 0; return; } - G1.eofile = 0; + //G1.eofile = 0; // globals are zeroed in pack_gzip() + /* Make sure that we always have enough lookahead. This is important * if input comes from a device such as a tty. */ while (G1.lookahead < MIN_LOOKAHEAD && !G1.eofile) fill_window(); - G1.ins_h = 0; + //G1.ins_h = 0; // globals are zeroed in pack_gzip() for (j = 0; j < MIN_MATCH - 1; j++) UPDATE_HASH(G1.ins_h, G1.window[j]); /* If lookahead < MIN_MATCH, ins_h is garbage, but this is @@ -1990,7 +1973,7 @@ static void ct_init(void) int code; /* code value */ int dist; /* distance index */ - G2.compressed_len = 0L; + //G2.compressed_len = 0L; // globals are zeroed in pack_gzip() #ifdef NOT_NEEDED if (G2.static_dtree[0].Len != 0) @@ -2073,12 +2056,11 @@ static void ct_init(void) * Deflate in to out. * IN assertions: the input and output buffers are cleared. */ - static void zip(void) { ush deflate_flags = 0; /* pkzip -es, -en or -ex equivalent */ - G1.outcnt = 0; + //G1.outcnt = 0; // globals are zeroed in pack_gzip() /* Write the header to the gzip file. See algorithm.doc for the format */ /* magic header for gzip files: 1F 8B */ @@ -2111,12 +2093,15 @@ static void zip(void) static IF_DESKTOP(long long) int FAST_FUNC pack_gzip(transformer_state_t *xstate UNUSED_PARAM) { + /* Reinit G1.xxx except pointers to allocated buffers */ + memset(&G1, 0, offsetof(struct globals, l_buf)); + /* Clear input and output buffers */ - G1.outcnt = 0; + //G1.outcnt = 0; #ifdef DEBUG - G1.insize = 0; + //G1.insize = 0; #endif - G1.isize = 0; + //G1.isize = 0; /* Reinit G2.xxx */ memset(&G2, 0, sizeof(G2)); |