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move [g]zip decompressor state into malloc'ed buffer. size:

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text    data     bss     dec     hex
5256       0     108    5364    14f4 - old
4915       0       0    4915    1333 - new
This commit is contained in:
Denis Vlasenko 2007-01-06 00:03:11 +00:00
parent d1a19affeb
commit c7a4aa5c99
1 changed files with 190 additions and 86 deletions
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276
archival/libunarchive/decompress_unzip.c
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@ -54,26 +54,129 @@ enum {
N_MAX = 288, /* maximum number of codes in any set */ N_MAX = 288, /* maximum number of codes in any set */
}; };
static off_t gunzip_bytes_out; /* number of output bytes */
static uint32_t gunzip_crc;
static int gunzip_src_fd; /* This is somewhat complex-looking arrangement, but it allows
static unsigned gunzip_outbuf_count; /* bytes in output buffer */ * to place decompressor state either in bss or in
* malloc'ed space simply by changing #defines below.
static unsigned char *gunzip_window; * Sizes on i386:
* text data bss dec hex
static uint32_t *gunzip_crc_table; * 5256 0 108 5364 14f4 - bss
* 4915 0 0 4915 1333 - malloc
*/
#define STATE_IN_BSS 0
#define STATE_IN_MALLOC 1
/* bitbuffer */ typedef struct state_t {
static unsigned gunzip_bb; /* bit buffer */ off_t gunzip_bytes_out; /* number of output bytes */
static unsigned char gunzip_bk; /* bits in bit buffer */ uint32_t gunzip_crc;
int gunzip_src_fd;
unsigned gunzip_outbuf_count; /* bytes in output buffer */
unsigned char *gunzip_window;
uint32_t *gunzip_crc_table;
/* bitbuffer */
unsigned gunzip_bb; /* bit buffer */
unsigned char gunzip_bk; /* bits in bit buffer */
/* These control the size of the STATE()bytebuffer */
unsigned bytebuffer_max;
unsigned char *bytebuffer;
unsigned bytebuffer_offset;
unsigned bytebuffer_size;
/* private data of inflate_codes() */
unsigned inflate_codes_ml; /* masks for bl and bd bits */
unsigned inflate_codes_md; /* masks for bl and bd bits */
unsigned inflate_codes_bb; /* bit buffer */
unsigned inflate_codes_k; /* number of bits in bit buffer */
unsigned inflate_codes_w; /* current gunzip_window position */
huft_t *inflate_codes_tl;
huft_t *inflate_codes_td;
unsigned inflate_codes_bl;
unsigned inflate_codes_bd;
smallint resume_copy;
/* private data of inflate_get_next_window() */
smallint method; /* Method == -1 for stored, -2 for codes */
smallint need_another_block;
smallint end_reached;
/* private data of inflate_stored() */
unsigned inflate_stored_n;
unsigned inflate_stored_b;
unsigned inflate_stored_k;
unsigned inflate_stored_w;
} state_t;
#define gunzip_bytes_out (S()gunzip_bytes_out )
#define gunzip_crc (S()gunzip_crc )
#define gunzip_src_fd (S()gunzip_src_fd )
#define gunzip_outbuf_count (S()gunzip_outbuf_count)
#define gunzip_window (S()gunzip_window )
#define gunzip_crc_table (S()gunzip_crc_table )
#define gunzip_bb (S()gunzip_bb )
#define gunzip_bk (S()gunzip_bk )
#define bytebuffer_max (S()bytebuffer_max )
#define bytebuffer (S()bytebuffer )
#define bytebuffer_offset (S()bytebuffer_offset )
#define bytebuffer_size (S()bytebuffer_size )
#define inflate_codes_ml (S()inflate_codes_ml )
#define inflate_codes_md (S()inflate_codes_md )
#define inflate_codes_bb (S()inflate_codes_bb )
#define inflate_codes_k (S()inflate_codes_k )
#define inflate_codes_w (S()inflate_codes_w )
#define inflate_codes_tl (S()inflate_codes_tl )
#define inflate_codes_td (S()inflate_codes_td )
#define inflate_codes_bl (S()inflate_codes_bl )
#define inflate_codes_bd (S()inflate_codes_bd )
#define resume_copy (S()resume_copy )
#define method (S()method )
#define need_another_block (S()need_another_block )
#define end_reached (S()end_reached )
#define inflate_stored_n (S()inflate_stored_n )
#define inflate_stored_b (S()inflate_stored_b )
#define inflate_stored_k (S()inflate_stored_k )
#define inflate_stored_w (S()inflate_stored_w )
#define INIT_STATE ({ bytebuffer_size = 0; method = -1; need_another_block = 1; })
/* This is generic part */
#if STATE_IN_BSS /* Use global data segment */
#define DECLARE_STATE /*nothing*/
#define ALLOC_STATE (init_state())
#define DEALLOC_STATE ((void)0)
#define S() state.
#define PASS_STATE /*nothing*/
#define PASS_STATE_ONLY /*nothing*/
#define STATE_PARAM /*nothing*/
#define STATE_PARAM_ONLY void
static state_t state;
static void init_state(void)
{
INIT_STATE;
}
#endif
#if STATE_IN_MALLOC /* Use malloc space */
#define DECLARE_STATE state_t *state
#define ALLOC_STATE (state = alloc_state())
#define DEALLOC_STATE free(state)
#define S() state->
#define PASS_STATE state,
#define PASS_STATE_ONLY state
#define STATE_PARAM state_t *state,
#define STATE_PARAM_ONLY state_t *state
static state_t* alloc_state(void)
{
state_t* state = xzalloc(sizeof(*state));
INIT_STATE;
return state;
}
#endif
/* These control the size of the bytebuffer */
static unsigned bytebuffer_max = 0x8000;
static unsigned char *bytebuffer = NULL;
static unsigned bytebuffer_offset = 0;
static unsigned bytebuffer_size = 0;
static const unsigned short mask_bits[] = { static const unsigned short mask_bits[] = {
0x0000, 0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff, 0x0000, 0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
@ -91,7 +194,7 @@ static const unsigned short cplens[] = {
static const unsigned char cplext[] = { static const unsigned char cplext[] = {
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5,
5, 5, 5, 0, 99, 99 5, 5, 5, 0, 99, 99
}; /* 99==invalid */ }; /* 99 == invalid */
/* Copy offsets for distance codes 0..29 */ /* Copy offsets for distance codes 0..29 */
static const unsigned short cpdist[] = { static const unsigned short cpdist[] = {
@ -111,7 +214,7 @@ static const unsigned char border[] = {
16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
}; };
static unsigned fill_bitbuffer(unsigned bitbuffer, unsigned *current, const unsigned required) static unsigned fill_bitbuffer(STATE_PARAM unsigned bitbuffer, unsigned *current, const unsigned required)
{ {
while (*current < required) { while (*current < required) {
if (bytebuffer_offset >= bytebuffer_size) { if (bytebuffer_offset >= bytebuffer_size) {
@ -201,7 +304,7 @@ static int huft_build(unsigned *b, const unsigned n,
p++; /* Can't combine with above line (Solaris bug) */ p++; /* Can't combine with above line (Solaris bug) */
} while (--i); } while (--i);
if (c[0] == n) { /* null input--all zero length codes */ if (c[0] == n) { /* null input--all zero length codes */
*t = (huft_t *) NULL; *t = NULL;
*m = 0; *m = 0;
return 2; return 2;
} }
@ -250,8 +353,8 @@ static int huft_build(unsigned *b, const unsigned n,
p = v; /* grab values in bit order */ p = v; /* grab values in bit order */
htl = -1; /* no tables yet--level -1 */ htl = -1; /* no tables yet--level -1 */
w = ws[0] = 0; /* bits decoded */ w = ws[0] = 0; /* bits decoded */
u[0] = (huft_t *) NULL; /* just to keep compilers happy */ u[0] = NULL; /* just to keep compilers happy */
q = (huft_t *) NULL; /* ditto */ q = NULL; /* ditto */
z = 0; /* ditto */ z = 0; /* ditto */
/* go through the bit lengths (k already is bits in shortest code) */ /* go through the bit lengths (k already is bits in shortest code) */
@ -357,14 +460,7 @@ static int huft_build(unsigned *b, const unsigned n,
#define td inflate_codes_td #define td inflate_codes_td
#define bl inflate_codes_bl #define bl inflate_codes_bl
#define bd inflate_codes_bd #define bd inflate_codes_bd
static unsigned ml, md; /* masks for bl and bd bits */ static void inflate_codes_setup(STATE_PARAM huft_t * my_tl, huft_t * my_td, const unsigned my_bl, const unsigned my_bd)
static unsigned bb; /* bit buffer */
static unsigned k; /* number of bits in bit buffer */
static unsigned w; /* current gunzip_window position */
static huft_t *tl, *td;
static unsigned bl, bd;
static int resumeCopy; /* = 0; */
static void inflate_codes_setup(huft_t * my_tl, huft_t * my_td, const unsigned my_bl, const unsigned my_bd)
{ {
tl = my_tl; tl = my_tl;
td = my_td; td = my_td;
@ -379,26 +475,27 @@ static void inflate_codes_setup(huft_t * my_tl, huft_t * my_td, const unsigned m
md = mask_bits[bd]; md = mask_bits[bd];
} }
/* called once from inflate_get_next_window */ /* called once from inflate_get_next_window */
static int inflate_codes(void) static int inflate_codes(STATE_PARAM_ONLY)
{ {
unsigned e; /* table entry flag/number of extra bits */ unsigned e; /* table entry flag/number of extra bits */
huft_t *t; /* pointer to table entry */ huft_t *t; /* pointer to table entry */
if (resumeCopy) goto do_copy; if (resume_copy) goto do_copy;
while (1) { /* do until end of block */ while (1) { /* do until end of block */
bb = fill_bitbuffer(bb, &k, bl); bb = fill_bitbuffer(PASS_STATE bb, &k, bl);
t = tl + ((unsigned) bb & ml); t = tl + ((unsigned) bb & ml);
e = t->e; e = t->e;
if (e > 16) if (e > 16)
do { do {
if (e == 99) { if (e == 99) {
//shouldn't we propagate error?
bb_error_msg_and_die("inflate_codes error 1"); bb_error_msg_and_die("inflate_codes error 1");
} }
bb >>= t->b; bb >>= t->b;
k -= t->b; k -= t->b;
e -= 16; e -= 16;
bb = fill_bitbuffer(bb, &k, e); bb = fill_bitbuffer(PASS_STATE bb, &k, e);
t = t->v.t + ((unsigned) bb & mask_bits[e]); t = t->v.t + ((unsigned) bb & mask_bits[e]);
e = t->e; e = t->e;
} while (e > 16); } while (e > 16);
@ -423,29 +520,30 @@ static int inflate_codes(void)
} }
/* get length of block to copy */ /* get length of block to copy */
bb = fill_bitbuffer(bb, &k, e); bb = fill_bitbuffer(PASS_STATE bb, &k, e);
n = t->v.n + ((unsigned) bb & mask_bits[e]); n = t->v.n + ((unsigned) bb & mask_bits[e]);
bb >>= e; bb >>= e;
k -= e; k -= e;
/* decode distance of block to copy */ /* decode distance of block to copy */
bb = fill_bitbuffer(bb, &k, bd); bb = fill_bitbuffer(PASS_STATE bb, &k, bd);
t = td + ((unsigned) bb & md); t = td + ((unsigned) bb & md);
e = t->e; e = t->e;
if (e > 16) if (e > 16)
do { do {
if (e == 99) if (e == 99)
//shouldn't we propagate error?
bb_error_msg_and_die("inflate_codes error 2"); bb_error_msg_and_die("inflate_codes error 2");
bb >>= t->b; bb >>= t->b;
k -= t->b; k -= t->b;
e -= 16; e -= 16;
bb = fill_bitbuffer(bb, &k, e); bb = fill_bitbuffer(PASS_STATE bb, &k, e);
t = t->v.t + ((unsigned) bb & mask_bits[e]); t = t->v.t + ((unsigned) bb & mask_bits[e]);
e = t->e; e = t->e;
} while (e > 16); } while (e > 16);
bb >>= t->b; bb >>= t->b;
k -= t->b; k -= t->b;
bb = fill_bitbuffer(bb, &k, e); bb = fill_bitbuffer(PASS_STATE bb, &k, e);
d = w - t->v.n - ((unsigned) bb & mask_bits[e]); d = w - t->v.n - ((unsigned) bb & mask_bits[e]);
bb >>= e; bb >>= e;
k -= e; k -= e;
@ -474,13 +572,13 @@ static int inflate_codes(void)
} }
if (w == GUNZIP_WSIZE) { if (w == GUNZIP_WSIZE) {
gunzip_outbuf_count = w; gunzip_outbuf_count = w;
resumeCopy = (n != 0); resume_copy = (n != 0);
//flush_gunzip_window(); //flush_gunzip_window();
w = 0; w = 0;
return 1; return 1;
} }
} while (n); } while (n);
resumeCopy = 0; resume_copy = 0;
} }
} }
@ -508,9 +606,8 @@ static int inflate_codes(void)
#undef bd #undef bd
static unsigned inflate_stored_n, inflate_stored_b, inflate_stored_k, inflate_stored_w;
/* called once from inflate_block */ /* called once from inflate_block */
static void inflate_stored_setup(int my_n, int my_b, int my_k) static void inflate_stored_setup(STATE_PARAM int my_n, int my_b, int my_k)
{ {
inflate_stored_n = my_n; inflate_stored_n = my_n;
inflate_stored_b = my_b; inflate_stored_b = my_b;
@ -519,11 +616,11 @@ static void inflate_stored_setup(int my_n, int my_b, int my_k)
inflate_stored_w = gunzip_outbuf_count; inflate_stored_w = gunzip_outbuf_count;
} }
/* called once from inflate_get_next_window */ /* called once from inflate_get_next_window */
static int inflate_stored(void) static int inflate_stored(STATE_PARAM_ONLY)
{ {
/* read and output the compressed data */ /* read and output the compressed data */
while (inflate_stored_n--) { while (inflate_stored_n--) {
inflate_stored_b = fill_bitbuffer(inflate_stored_b, &inflate_stored_k, 8); inflate_stored_b = fill_bitbuffer(PASS_STATE inflate_stored_b, &inflate_stored_k, 8);
gunzip_window[inflate_stored_w++] = (unsigned char) inflate_stored_b; gunzip_window[inflate_stored_w++] = (unsigned char) inflate_stored_b;
if (inflate_stored_w == GUNZIP_WSIZE) { if (inflate_stored_w == GUNZIP_WSIZE) {
gunzip_outbuf_count = inflate_stored_w; gunzip_outbuf_count = inflate_stored_w;
@ -553,7 +650,7 @@ static int inflate_stored(void)
*/ */
/* Return values: -1 = inflate_stored, -2 = inflate_codes */ /* Return values: -1 = inflate_stored, -2 = inflate_codes */
/* One callsite in inflate_get_next_window */ /* One callsite in inflate_get_next_window */
static int inflate_block(int *e) static int inflate_block(STATE_PARAM smallint *e)
{ {
unsigned t; /* block type */ unsigned t; /* block type */
unsigned b; /* bit buffer */ unsigned b; /* bit buffer */
@ -565,13 +662,13 @@ static int inflate_block(int *e)
k = gunzip_bk; k = gunzip_bk;
/* read in last block bit */ /* read in last block bit */
b = fill_bitbuffer(b, &k, 1); b = fill_bitbuffer(PASS_STATE b, &k, 1);
*e = (int) b & 1; *e = b & 1;
b >>= 1; b >>= 1;
k -= 1; k -= 1;
/* read in block type */ /* read in block type */
b = fill_bitbuffer(b, &k, 2); b = fill_bitbuffer(PASS_STATE b, &k, 2);
t = (unsigned) b & 3; t = (unsigned) b & 3;
b >>= 2; b >>= 2;
k -= 2; k -= 2;
@ -598,19 +695,19 @@ static int inflate_block(int *e)
k_stored -= n; k_stored -= n;
/* get the length and its complement */ /* get the length and its complement */
b_stored = fill_bitbuffer(b_stored, &k_stored, 16); b_stored = fill_bitbuffer(PASS_STATE b_stored, &k_stored, 16);
n = ((unsigned) b_stored & 0xffff); n = ((unsigned) b_stored & 0xffff);
b_stored >>= 16; b_stored >>= 16;
k_stored -= 16; k_stored -= 16;
b_stored = fill_bitbuffer(b_stored, &k_stored, 16); b_stored = fill_bitbuffer(PASS_STATE b_stored, &k_stored, 16);
if (n != (unsigned) ((~b_stored) & 0xffff)) { if (n != (unsigned) ((~b_stored) & 0xffff)) {
return 1; /* error in compressed data */ return 1; /* error in compressed data */
} }
b_stored >>= 16; b_stored >>= 16;
k_stored -= 16; k_stored -= 16;
inflate_stored_setup(n, b_stored, k_stored); // Setup inflate_stored inflate_stored_setup(PASS_STATE n, b_stored, k_stored); // Setup inflate_stored
return -1; return -1;
} }
@ -658,7 +755,7 @@ static int inflate_block(int *e)
} }
/* decompress until an end-of-block code */ /* decompress until an end-of-block code */
inflate_codes_setup(tl, td, bl, bd); // Setup inflate_codes inflate_codes_setup(PASS_STATE tl, td, bl, bd); // Setup inflate_codes
/* huft_free code moved into inflate_codes */ /* huft_free code moved into inflate_codes */
@ -691,17 +788,17 @@ static int inflate_block(int *e)
k_dynamic = gunzip_bk; k_dynamic = gunzip_bk;
/* read in table lengths */ /* read in table lengths */
b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 5); b_dynamic = fill_bitbuffer(PASS_STATE b_dynamic, &k_dynamic, 5);
nl = 257 + ((unsigned) b_dynamic & 0x1f); /* number of literal/length codes */ nl = 257 + ((unsigned) b_dynamic & 0x1f); /* number of literal/length codes */
b_dynamic >>= 5; b_dynamic >>= 5;
k_dynamic -= 5; k_dynamic -= 5;
b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 5); b_dynamic = fill_bitbuffer(PASS_STATE b_dynamic, &k_dynamic, 5);
nd = 1 + ((unsigned) b_dynamic & 0x1f); /* number of distance codes */ nd = 1 + ((unsigned) b_dynamic & 0x1f); /* number of distance codes */
b_dynamic >>= 5; b_dynamic >>= 5;
k_dynamic -= 5; k_dynamic -= 5;
b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 4); b_dynamic = fill_bitbuffer(PASS_STATE b_dynamic, &k_dynamic, 4);
nb = 4 + ((unsigned) b_dynamic & 0xf); /* number of bit length codes */ nb = 4 + ((unsigned) b_dynamic & 0xf); /* number of bit length codes */
b_dynamic >>= 4; b_dynamic >>= 4;
@ -712,7 +809,7 @@ static int inflate_block(int *e)
/* read in bit-length-code lengths */ /* read in bit-length-code lengths */
for (j = 0; j < nb; j++) { for (j = 0; j < nb; j++) {
b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 3); b_dynamic = fill_bitbuffer(PASS_STATE b_dynamic, &k_dynamic, 3);
ll[border[j]] = (unsigned) b_dynamic & 7; ll[border[j]] = (unsigned) b_dynamic & 7;
b_dynamic >>= 3; b_dynamic >>= 3;
k_dynamic -= 3; k_dynamic -= 3;
@ -736,7 +833,7 @@ static int inflate_block(int *e)
m = mask_bits[bl]; m = mask_bits[bl];
i = l = 0; i = l = 0;
while ((unsigned) i < n) { while ((unsigned) i < n) {
b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, (unsigned)bl); b_dynamic = fill_bitbuffer(PASS_STATE b_dynamic, &k_dynamic, (unsigned)bl);
j = (td = tl + ((unsigned) b_dynamic & m))->b; j = (td = tl + ((unsigned) b_dynamic & m))->b;
b_dynamic >>= j; b_dynamic >>= j;
k_dynamic -= j; k_dynamic -= j;
@ -744,7 +841,7 @@ static int inflate_block(int *e)
if (j < 16) { /* length of code in bits (0..15) */ if (j < 16) { /* length of code in bits (0..15) */
ll[i++] = l = j; /* save last length in l */ ll[i++] = l = j; /* save last length in l */
} else if (j == 16) { /* repeat last length 3 to 6 times */ } else if (j == 16) { /* repeat last length 3 to 6 times */
b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 2); b_dynamic = fill_bitbuffer(PASS_STATE b_dynamic, &k_dynamic, 2);
j = 3 + ((unsigned) b_dynamic & 3); j = 3 + ((unsigned) b_dynamic & 3);
b_dynamic >>= 2; b_dynamic >>= 2;
k_dynamic -= 2; k_dynamic -= 2;
@ -755,7 +852,7 @@ static int inflate_block(int *e)
ll[i++] = l; ll[i++] = l;
} }
} else if (j == 17) { /* 3 to 10 zero length codes */ } else if (j == 17) { /* 3 to 10 zero length codes */
b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 3); b_dynamic = fill_bitbuffer(PASS_STATE b_dynamic, &k_dynamic, 3);
j = 3 + ((unsigned) b_dynamic & 7); j = 3 + ((unsigned) b_dynamic & 7);
b_dynamic >>= 3; b_dynamic >>= 3;
k_dynamic -= 3; k_dynamic -= 3;
@ -767,7 +864,7 @@ static int inflate_block(int *e)
} }
l = 0; l = 0;
} else { /* j == 18: 11 to 138 zero length codes */ } else { /* j == 18: 11 to 138 zero length codes */
b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 7); b_dynamic = fill_bitbuffer(PASS_STATE b_dynamic, &k_dynamic, 7);
j = 11 + ((unsigned) b_dynamic & 0x7f); j = 11 + ((unsigned) b_dynamic & 0x7f);
b_dynamic >>= 7; b_dynamic >>= 7;
k_dynamic -= 7; k_dynamic -= 7;
@ -794,6 +891,7 @@ static int inflate_block(int *e)
i = huft_build(ll, nl, 257, cplens, cplext, &tl, &bl); i = huft_build(ll, nl, 257, cplens, cplext, &tl, &bl);
if (i != 0) { if (i != 0) {
if (i == 1) { if (i == 1) {
//shouldn't we propagate error?
bb_error_msg_and_die("incomplete literal tree"); bb_error_msg_and_die("incomplete literal tree");
/* huft_free(tl); */ /* huft_free(tl); */
} }
@ -804,6 +902,7 @@ static int inflate_block(int *e)
i = huft_build(ll + nl, nd, 0, cpdist, cpdext, &td, &bd); i = huft_build(ll + nl, nd, 0, cpdist, cpdext, &td, &bd);
if (i != 0) { if (i != 0) {
if (i == 1) { if (i == 1) {
//shouldn't we propagate error?
bb_error_msg_and_die("incomplete distance tree"); bb_error_msg_and_die("incomplete distance tree");
/* huft_free(td); */ /* huft_free(td); */
} }
@ -812,7 +911,7 @@ static int inflate_block(int *e)
} }
/* decompress until an end-of-block code */ /* decompress until an end-of-block code */
inflate_codes_setup(tl, td, bl, bd); // Setup inflate_codes inflate_codes_setup(PASS_STATE tl, td, bl, bd); // Setup inflate_codes
/* huft_free code moved into inflate_codes */ /* huft_free code moved into inflate_codes */
@ -820,12 +919,13 @@ static int inflate_block(int *e)
} }
default: default:
/* bad block type */ /* bad block type */
//shouldn't we propagate error?
bb_error_msg_and_die("bad block type %d", t); bb_error_msg_and_die("bad block type %d", t);
} }
} }
/* Two callsites, both in inflate_get_next_window */ /* Two callsites, both in inflate_get_next_window */
static void calculate_gunzip_crc(void) static void calculate_gunzip_crc(STATE_PARAM_ONLY)
{ {
int n; int n;
for (n = 0; n < gunzip_outbuf_count; n++) { for (n = 0; n < gunzip_outbuf_count; n++) {
@ -835,44 +935,41 @@ static void calculate_gunzip_crc(void)
} }
/* One callsite in inflate_unzip_internal */ /* One callsite in inflate_unzip_internal */
static int inflate_get_next_window(void) static int inflate_get_next_window(STATE_PARAM_ONLY)
{ {
static int method = -1; // Method == -1 for stored, -2 for codes
static int e = 0;
static int needAnotherBlock = 1;
gunzip_outbuf_count = 0; gunzip_outbuf_count = 0;
while (1) { while (1) {
int ret; int ret;
if (needAnotherBlock) { if (need_another_block) {
if (e) { if (end_reached) {
calculate_gunzip_crc(); calculate_gunzip_crc(PASS_STATE_ONLY);
e = 0; end_reached = 0;
needAnotherBlock = 1; need_another_block = 1;
return 0; return 0; /* Last block */
} // Last block }
method = inflate_block(&e); method = inflate_block(PASS_STATE &end_reached);
needAnotherBlock = 0; need_another_block = 0;
} }
switch (method) { switch (method) {
case -1: case -1:
ret = inflate_stored(); ret = inflate_stored(PASS_STATE_ONLY);
break; break;
case -2: case -2:
ret = inflate_codes(); ret = inflate_codes(PASS_STATE_ONLY);
break; break;
default: default:
//shouldn't we propagate error?
bb_error_msg_and_die("inflate error %d", method); bb_error_msg_and_die("inflate error %d", method);
} }
if (ret == 1) { if (ret == 1) {
calculate_gunzip_crc(); calculate_gunzip_crc(PASS_STATE_ONLY);
return 1; // More data left return 1; // More data left
} else }
needAnotherBlock = 1; // End of that block need_another_block = 1; // End of that block
} }
/* Doesnt get here */ /* Doesnt get here */
} }
@ -881,7 +978,7 @@ static int inflate_get_next_window(void)
/* Called from inflate_gunzip() and inflate_unzip() */ /* Called from inflate_gunzip() and inflate_unzip() */
/* NB: bytebuffer is allocated here but freeing it is left to the caller! */ /* NB: bytebuffer is allocated here but freeing it is left to the caller! */
static USE_DESKTOP(long long) int static USE_DESKTOP(long long) int
inflate_unzip_internal(int in, int out) inflate_unzip_internal(STATE_PARAM int in, int out)
{ {
USE_DESKTOP(long long) int n = 0; USE_DESKTOP(long long) int n = 0;
ssize_t nwrote; ssize_t nwrote;
@ -904,7 +1001,7 @@ inflate_unzip_internal(int in, int out)
bytebuffer = xmalloc(bytebuffer_max); bytebuffer = xmalloc(bytebuffer_max);
while (1) { while (1) {
int r = inflate_get_next_window(); int r = inflate_get_next_window(PASS_STATE_ONLY);
nwrote = full_write(out, gunzip_window, gunzip_outbuf_count); nwrote = full_write(out, gunzip_window, gunzip_outbuf_count);
if (nwrote != gunzip_outbuf_count) { if (nwrote != gunzip_outbuf_count) {
bb_perror_msg("write"); bb_perror_msg("write");
@ -936,16 +1033,18 @@ USE_DESKTOP(long long) int
inflate_unzip(inflate_unzip_result *res, unsigned bufsize, int in, int out) inflate_unzip(inflate_unzip_result *res, unsigned bufsize, int in, int out)
{ {
USE_DESKTOP(long long) int n; USE_DESKTOP(long long) int n;
DECLARE_STATE;
ALLOC_STATE;
bytebuffer_max = bufsize + 8; bytebuffer_max = bufsize + 8;
bytebuffer_offset = 4; bytebuffer_offset = 4;
bytebuffer_size = 0; n = inflate_unzip_internal(PASS_STATE in, out);
n = inflate_unzip_internal(in, out);
res->crc = gunzip_crc; res->crc = gunzip_crc;
res->bytes_out = gunzip_bytes_out; res->bytes_out = gunzip_bytes_out;
free(bytebuffer); free(bytebuffer);
DEALLOC_STATE;
return n; return n;
} }
@ -956,8 +1055,12 @@ inflate_gunzip(int in, int out)
uint32_t stored_crc = 0; uint32_t stored_crc = 0;
unsigned count; unsigned count;
USE_DESKTOP(long long) int n; USE_DESKTOP(long long) int n;
DECLARE_STATE;
n = inflate_unzip_internal(in, out); ALLOC_STATE;
bytebuffer_max = 0x8000;
n = inflate_unzip_internal(PASS_STATE in, out);
if (n < 0) goto ret; if (n < 0) goto ret;
@ -990,5 +1093,6 @@ inflate_gunzip(int in, int out)
} }
ret: ret:
free(bytebuffer); free(bytebuffer);
DEALLOC_STATE;
return n; return n;
} }