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-rw-r--r--libbb/unzip.c755
1 files changed, 382 insertions, 373 deletions
diff --git a/libbb/unzip.c b/libbb/unzip.c
index cde16d067..76fb86285 100644
--- a/libbb/unzip.c
+++ b/libbb/unzip.c
@@ -69,7 +69,7 @@ static char *license_msg[] = {
#include "libbb.h"
#ifdef CONFIG_FEATURE_UNCOMPRESS
-int uncompress ( FILE *in, FILE *out );
+int uncompress(FILE * in, FILE * out);
#endif
static FILE *in_file, *out_file;
@@ -78,7 +78,7 @@ static FILE *in_file, *out_file;
static unsigned char *window;
static unsigned long *crc_table;
-static unsigned long crc; /* shift register contents */
+static unsigned long crc; /* shift register contents */
/* Return codes from gzip */
static const int ERROR = 1;
@@ -90,21 +90,21 @@ static const int ERROR = 1;
static const int WSIZE = 0x8000;
/* If BMAX needs to be larger than 16, then h and x[] should be ulg. */
-static const int BMAX = 16; /* maximum bit length of any code (16 for explode) */
-static const int N_MAX = 288; /* maximum number of codes in any set */
+static const int BMAX = 16; /* maximum bit length of any code (16 for explode) */
+static const int N_MAX = 288; /* maximum number of codes in any set */
-static long bytes_out; /* number of output bytes */
+static long bytes_out; /* number of output bytes */
static unsigned long outcnt; /* bytes in output buffer */
-static unsigned hufts; /* track memory usage */
-static unsigned long bb; /* bit buffer */
+static unsigned hufts; /* track memory usage */
+static unsigned long bb; /* bit buffer */
static unsigned bk; /* bits in bit buffer */
typedef struct huft_s {
- unsigned char e; /* number of extra bits or operation */
- unsigned char b; /* number of bits in this code or subcode */
+ unsigned char e; /* number of extra bits or operation */
+ unsigned char b; /* number of bits in this code or subcode */
union {
- unsigned short n; /* literal, length base, or distance base */
+ unsigned short n; /* literal, length base, or distance base */
struct huft_s *t; /* pointer to next level of table */
} v;
} huft_t;
@@ -115,11 +115,11 @@ static const unsigned short mask_bits[] = {
0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
};
-//static int error_number = 0;
+/* static int error_number = 0; */
/* ========================================================================
* Signal and error handler.
*/
-
+
static void abort_gzip(void)
{
error_msg("gzip aborted\n");
@@ -128,26 +128,28 @@ static void abort_gzip(void)
static void make_crc_table(void)
{
- const unsigned long poly = 0xedb88320; /* polynomial exclusive-or pattern */
- unsigned short i; /* counter for all possible eight bit values */
+ const unsigned long poly = 0xedb88320; /* polynomial exclusive-or pattern */
+ unsigned short i; /* counter for all possible eight bit values */
/* initial shift register value */
- crc = 0xffffffffL;
+ crc = 0xffffffffL;
crc_table = (unsigned long *) malloc(256 * sizeof(unsigned long));
/* Compute and print table of CRC's, five per line */
for (i = 0; i < 256; i++) {
- unsigned long table_entry; /* crc shift register */
- char k; /* byte being shifted into crc apparatus */
+ unsigned long table_entry; /* crc shift register */
+ char k; /* byte being shifted into crc apparatus */
table_entry = i;
- /* The idea to initialize the register with the byte instead of
- * zero was stolen from Haruhiko Okumura's ar002
- */
+ /* The idea to initialize the register with the byte instead of
+ * zero was stolen from Haruhiko Okumura's ar002
+ */
for (k = 8; k; k--) {
- table_entry = table_entry & 1 ? (table_entry >> 1) ^ poly : table_entry >> 1;
+ table_entry =
+ table_entry & 1 ? (table_entry >> 1) ^ poly : table_entry >>
+ 1;
}
- crc_table[i]=table_entry;
+ crc_table[i] = table_entry;
}
}
@@ -179,7 +181,7 @@ static void flush_window(void)
* each table.
* t: table to free
*/
-static int huft_free(huft_t *t)
+static int huft_free(huft_t * t)
{
huft_t *p, *q;
@@ -209,36 +211,37 @@ typedef unsigned char extra_bits_t;
* t: result: starting table
* m: maximum lookup bits, returns actual
*/
-static int huft_build(unsigned int *b, const unsigned int n, const unsigned int s,
- const unsigned short *d, const extra_bits_t *e, huft_t **t, int *m)
+static int huft_build(unsigned int *b, const unsigned int n,
+ const unsigned int s, const unsigned short *d,
+ const extra_bits_t * e, huft_t ** t, int *m)
{
- unsigned a; /* counter for codes of length k */
+ unsigned a; /* counter for codes of length k */
unsigned c[BMAX + 1]; /* bit length count table */
- unsigned f; /* i repeats in table every f entries */
- int g; /* maximum code length */
- int h; /* table level */
+ unsigned f; /* i repeats in table every f entries */
+ int g; /* maximum code length */
+ int h; /* table level */
register unsigned i; /* counter, current code */
register unsigned j; /* counter */
register int k; /* number of bits in current code */
- int l; /* bits per table (returned in m) */
- register unsigned *p; /* pointer into c[], b[], or v[] */
+ int l; /* bits per table (returned in m) */
+ register unsigned *p; /* pointer into c[], b[], or v[] */
register huft_t *q; /* points to current table */
- huft_t r; /* table entry for structure assignment */
+ huft_t r; /* table entry for structure assignment */
huft_t *u[BMAX]; /* table stack */
unsigned v[N_MAX]; /* values in order of bit length */
register int w; /* bits before this table == (l * h) */
unsigned x[BMAX + 1]; /* bit offsets, then code stack */
unsigned *xp; /* pointer into x */
- int y; /* number of dummy codes added */
- unsigned z; /* number of entries in current table */
+ int y; /* number of dummy codes added */
+ unsigned z; /* number of entries in current table */
/* Generate counts for each bit length */
- memset ((void *)(c), 0, sizeof(c));
+ memset((void *) (c), 0, sizeof(c));
p = b;
i = n;
do {
- c[*p]++; /* assume all entries <= BMAX */
- p++; /* Can't combine with above line (Solaris bug) */
+ c[*p]++; /* assume all entries <= BMAX */
+ p++; /* Can't combine with above line (Solaris bug) */
} while (--i);
if (c[0] == n) { /* null input--all zero length codes */
*t = (huft_t *) NULL;
@@ -274,7 +277,7 @@ static int huft_build(unsigned int *b, const unsigned int n, const unsigned int
x[1] = j = 0;
p = c + 1;
xp = x + 2;
- while (--i) { /* note that i == g from above */
+ while (--i) { /* note that i == g from above */
*xp++ = (j += *p++);
}
@@ -287,7 +290,7 @@ static int huft_build(unsigned int *b, const unsigned int n, const unsigned int
} while (++i < n);
/* Generate the Huffman codes and for each, make the table entries */
- x[0] = i = 0; /* first Huffman code is zero */
+ x[0] = i = 0; /* first Huffman code is zero */
p = v; /* grab values in bit order */
h = -1; /* no tables yet--level -1 */
w = -l; /* bits decoded == (l * h) */
@@ -303,7 +306,7 @@ static int huft_build(unsigned int *b, const unsigned int n, const unsigned int
/* make tables up to required level */
while (k > w + l) {
h++;
- w += l; /* previous table always l bits */
+ w += l; /* previous table always l bits */
/* compute minimum size table less than or equal to l bits */
z = (z = g - w) > (unsigned) l ? l : z; /* upper limit on table size */
@@ -316,15 +319,15 @@ static int huft_build(unsigned int *b, const unsigned int n, const unsigned int
f -= *xp; /* else deduct codes from patterns */
}
}
- z = 1 << j; /* table entries for j-bit table */
+ z = 1 << j; /* table entries for j-bit table */
/* allocate and link in new table */
q = (huft_t *) xmalloc((z + 1) * sizeof(huft_t));
hufts += z + 1; /* track memory usage */
- *t = q + 1; /* link to list for huft_free() */
+ *t = q + 1; /* link to list for huft_free() */
*(t = &(q->v.t)) = NULL;
- u[h] = ++q; /* table starts after link */
+ u[h] = ++q; /* table starts after link */
/* connect to last table, if there is one */
if (h) {
@@ -340,11 +343,11 @@ static int huft_build(unsigned int *b, const unsigned int n, const unsigned int
/* set up table entry in r */
r.b = (unsigned char) (k - w);
if (p >= v + n)
- r.e = 99; /* out of values--invalid code */
+ r.e = 99; /* out of values--invalid code */
else if (*p < s) {
r.e = (unsigned char) (*p < 256 ? 16 : 15); /* 256 is end-of-block code */
r.v.n = (unsigned short) (*p); /* simple code is just the value */
- p++; /* one compiler does not like *p++ */
+ p++; /* one compiler does not like *p++ */
} else {
r.e = (unsigned char) e[*p - s]; /* non-simple--look up in lists */
r.v.n = d[*p++ - s];
@@ -362,7 +365,7 @@ static int huft_build(unsigned int *b, const unsigned int n, const unsigned int
/* backup over finished tables */
while ((i & ((1 << w) - 1)) != x[h]) {
- h--; /* don't need to update q */
+ h--; /* don't need to update q */
w -= l;
}
}
@@ -378,52 +381,52 @@ static int huft_build(unsigned int *b, const unsigned int n, const unsigned int
* tl, td: literal/length and distance decoder tables
* bl, bd: number of bits decoded by tl[] and td[]
*/
-static int inflate_codes(huft_t *tl, huft_t *td, int bl, int bd)
+static int inflate_codes(huft_t * tl, huft_t * td, int bl, int bd)
{
- register unsigned long e; /* table entry flag/number of extra bits */
- unsigned long n, d; /* length and index for copy */
- unsigned long w; /* current window position */
- huft_t *t; /* pointer to table entry */
- unsigned ml, md; /* masks for bl and bd bits */
- register unsigned long b; /* bit buffer */
- register unsigned k; /* number of bits in bit buffer */
+ register unsigned long e; /* table entry flag/number of extra bits */
+ unsigned long n, d; /* length and index for copy */
+ unsigned long w; /* current window position */
+ huft_t *t; /* pointer to table entry */
+ unsigned ml, md; /* masks for bl and bd bits */
+ register unsigned long b; /* bit buffer */
+ register unsigned k; /* number of bits in bit buffer */
/* make local copies of globals */
- b = bb; /* initialize bit buffer */
+ b = bb; /* initialize bit buffer */
k = bk;
- w = outcnt; /* initialize window position */
+ w = outcnt; /* initialize window position */
/* inflate the coded data */
- ml = mask_bits[bl]; /* precompute masks for speed */
+ ml = mask_bits[bl]; /* precompute masks for speed */
md = mask_bits[bd];
- for (;;) { /* do until end of block */
+ for (;;) { /* do until end of block */
while (k < (unsigned) bl) {
- b |= ((unsigned long)fgetc(in_file)) << k;
+ b |= ((unsigned long) fgetc(in_file)) << k;
k += 8;
}
if ((e = (t = tl + ((unsigned) b & ml))->e) > 16)
- do {
- if (e == 99) {
- return 1;
- }
- b >>= t->b;
- k -= t->b;
- e -= 16;
- while (k < e) {
- b |= ((unsigned long)fgetc(in_file)) << k;
- k += 8;
- }
- } while ((e = (t = t->v.t + ((unsigned) b & mask_bits[e]))->e) > 16);
+ do {
+ if (e == 99) {
+ return 1;
+ }
+ b >>= t->b;
+ k -= t->b;
+ e -= 16;
+ while (k < e) {
+ b |= ((unsigned long) fgetc(in_file)) << k;
+ k += 8;
+ }
+ } while ((e =
+ (t = t->v.t + ((unsigned) b & mask_bits[e]))->e) > 16);
b >>= t->b;
k -= t->b;
- if (e == 16) { /* then it's a literal */
+ if (e == 16) { /* then it's a literal */
window[w++] = (unsigned char) t->v.n;
if (w == WSIZE) {
- outcnt=(w),
- flush_window();
+ outcnt = (w), flush_window();
w = 0;
}
- } else { /* it's an EOB or a length */
+ } else { /* it's an EOB or a length */
/* exit if end of block */
if (e == 15) {
@@ -432,7 +435,7 @@ static int inflate_codes(huft_t *tl, huft_t *td, int bl, int bd)
/* get length of block to copy */
while (k < e) {
- b |= ((unsigned long)fgetc(in_file)) << k;
+ b |= ((unsigned long) fgetc(in_file)) << k;
k += 8;
}
n = t->v.n + ((unsigned) b & mask_bits[e]);
@@ -441,7 +444,7 @@ static int inflate_codes(huft_t *tl, huft_t *td, int bl, int bd)
/* decode distance of block to copy */
while (k < (unsigned) bd) {
- b |= ((unsigned long)fgetc(in_file)) << k;
+ b |= ((unsigned long) fgetc(in_file)) << k;
k += 8;
}
@@ -453,14 +456,16 @@ static int inflate_codes(huft_t *tl, huft_t *td, int bl, int bd)
k -= t->b;
e -= 16;
while (k < e) {
- b |= ((unsigned long)fgetc(in_file)) << k;
+ b |= ((unsigned long) fgetc(in_file)) << k;
k += 8;
}
- } while ((e = (t = t->v.t + ((unsigned) b & mask_bits[e]))->e) > 16);
+ } while ((e =
+ (t =
+ t->v.t + ((unsigned) b & mask_bits[e]))->e) > 16);
b >>= t->b;
k -= t->b;
while (k < e) {
- b |= ((unsigned long)fgetc(in_file)) << k;
+ b |= ((unsigned long) fgetc(in_file)) << k;
k += 8;
}
d = w - t->v.n - ((unsigned) b & mask_bits[e]);
@@ -469,20 +474,21 @@ static int inflate_codes(huft_t *tl, huft_t *td, int bl, int bd)
/* do the copy */
do {
- n -= (e = (e = WSIZE - ((d &= WSIZE - 1) > w ? d : w)) > n ? n : e);
+ n -= (e =
+ (e =
+ WSIZE - ((d &= WSIZE - 1) > w ? d : w)) > n ? n : e);
#if !defined(NOMEMCPY) && !defined(DEBUG)
if (w - d >= e) { /* (this test assumes unsigned comparison) */
memcpy(window + w, window + d, e);
w += e;
d += e;
- } else /* do it slow to avoid memcpy() overlap */
+ } else /* do it slow to avoid memcpy() overlap */
#endif /* !NOMEMCPY */
do {
window[w++] = window[d++];
} while (--e);
if (w == WSIZE) {
- outcnt=(w),
- flush_window();
+ outcnt = (w), flush_window();
w = 0;
}
} while (n);
@@ -498,28 +504,30 @@ static int inflate_codes(huft_t *tl, huft_t *td, int bl, int bd)
return 0;
}
-static const unsigned short cplens[] = { /* Copy lengths for literal codes 257..285 */
- 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
- 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0
+static const unsigned short cplens[] = { /* Copy lengths for literal codes 257..285 */
+ 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
+ 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0
};
+
/* note: see note #13 above about the 258 in this list. */
-static const extra_bits_t cplext[] = { /* Extra bits for literal codes 257..285 */
- 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
-}; /* 99==invalid */
-static const unsigned short cpdist[] = { /* Copy offsets for distance codes 0..29 */
- 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
- 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
- 8193, 12289, 16385, 24577
+static const extra_bits_t cplext[] = { /* Extra bits for literal codes 257..285 */
+ 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
+}; /* 99==invalid */
+static const unsigned short cpdist[] = { /* Copy offsets for distance codes 0..29 */
+ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+ 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
+ 8193, 12289, 16385, 24577
};
-static const extra_bits_t cpdext[] = { /* Extra bits for distance codes */
- 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
- 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
- 12, 12, 13, 13
+static const extra_bits_t cpdext[] = { /* Extra bits for distance codes */
+ 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
+ 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
+ 12, 12, 13, 13
};
+
/* Tables for deflate from PKZIP's appnote.txt. */
-static const extra_bits_t border[] = { /* Order of the bit length code lengths */
- 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
+static const extra_bits_t border[] = { /* Order of the bit length code lengths */
+ 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
};
/*
@@ -531,8 +539,8 @@ static const extra_bits_t border[] = { /* Order of the bit length code lengths
static int inflate_block(int *e)
{
unsigned t; /* block type */
- register unsigned long b; /* bit buffer */
- register unsigned k; /* number of bits in bit buffer */
+ register unsigned long b; /* bit buffer */
+ register unsigned k; /* number of bits in bit buffer */
/* make local bit buffer */
b = bb;
@@ -540,7 +548,7 @@ static int inflate_block(int *e)
/* read in last block bit */
while (k < 1) {
- b |= ((unsigned long)fgetc(in_file)) << k;
+ b |= ((unsigned long) fgetc(in_file)) << k;
k += 8;
}
*e = (int) b & 1;
@@ -549,7 +557,7 @@ static int inflate_block(int *e)
/* read in block type */
while (k < 2) {
- b |= ((unsigned long)fgetc(in_file)) << k;
+ b |= ((unsigned long) fgetc(in_file)) << k;
k += 8;
}
t = (unsigned) b & 3;
@@ -562,286 +570,287 @@ static int inflate_block(int *e)
/* inflate that block type */
switch (t) {
- case 0: /* Inflate stored */
- {
- unsigned long n; /* number of bytes in block */
- unsigned long w; /* current window position */
- register unsigned long b_stored; /* bit buffer */
- register unsigned long k_stored; /* number of bits in bit buffer */
-
- /* make local copies of globals */
- b_stored = bb; /* initialize bit buffer */
- k_stored = bk;
- w = outcnt; /* initialize window position */
-
- /* go to byte boundary */
- n = k_stored & 7;
- b_stored >>= n;
- k_stored -= n;
-
- /* get the length and its complement */
- while (k_stored < 16) {
- b_stored |= ((unsigned long)fgetc(in_file)) << k_stored;
- k_stored += 8;
- }
- n = ((unsigned) b_stored & 0xffff);
- b_stored >>= 16;
- k_stored -= 16;
- while (k_stored < 16) {
- b_stored |= ((unsigned long)fgetc(in_file)) << k_stored;
+ case 0: /* Inflate stored */
+ {
+ unsigned long n; /* number of bytes in block */
+ unsigned long w; /* current window position */
+ register unsigned long b_stored; /* bit buffer */
+ register unsigned long k_stored; /* number of bits in bit buffer */
+
+ /* make local copies of globals */
+ b_stored = bb; /* initialize bit buffer */
+ k_stored = bk;
+ w = outcnt; /* initialize window position */
+
+ /* go to byte boundary */
+ n = k_stored & 7;
+ b_stored >>= n;
+ k_stored -= n;
+
+ /* get the length and its complement */
+ while (k_stored < 16) {
+ b_stored |= ((unsigned long) fgetc(in_file)) << k_stored;
+ k_stored += 8;
+ }
+ n = ((unsigned) b_stored & 0xffff);
+ b_stored >>= 16;
+ k_stored -= 16;
+ while (k_stored < 16) {
+ b_stored |= ((unsigned long) fgetc(in_file)) << k_stored;
+ k_stored += 8;
+ }
+ if (n != (unsigned) ((~b_stored) & 0xffff)) {
+ return 1; /* error in compressed data */
+ }
+ b_stored >>= 16;
+ k_stored -= 16;
+
+ /* read and output the compressed data */
+ while (n--) {
+ while (k_stored < 8) {
+ b_stored |= ((unsigned long) fgetc(in_file)) << k_stored;
k_stored += 8;
}
- if (n != (unsigned) ((~b_stored) & 0xffff)) {
- return 1; /* error in compressed data */
- }
- b_stored >>= 16;
- k_stored -= 16;
-
- /* read and output the compressed data */
- while (n--) {
- while (k_stored < 8) {
- b_stored |= ((unsigned long)fgetc(in_file)) << k_stored;
- k_stored += 8;
- }
- window[w++] = (unsigned char) b_stored;
- if (w == (unsigned long)WSIZE) {
- outcnt=(w),
- flush_window();
- w = 0;
- }
- b_stored >>= 8;
- k_stored -= 8;
+ window[w++] = (unsigned char) b_stored;
+ if (w == (unsigned long) WSIZE) {
+ outcnt = (w), flush_window();
+ w = 0;
}
+ b_stored >>= 8;
+ k_stored -= 8;
+ }
- /* restore the globals from the locals */
- outcnt = w; /* restore global window pointer */
- bb = b_stored; /* restore global bit buffer */
- bk = k_stored;
- return 0;
+ /* restore the globals from the locals */
+ outcnt = w; /* restore global window pointer */
+ bb = b_stored; /* restore global bit buffer */
+ bk = k_stored;
+ return 0;
+ }
+ case 1: /* Inflate fixed
+ * decompress an inflated type 1 (fixed Huffman codes) block. We should
+ * either replace this with a custom decoder, or at least precompute the
+ * Huffman tables.
+ */
+ {
+ int i; /* temporary variable */
+ huft_t *tl; /* literal/length code table */
+ huft_t *td; /* distance code table */
+ int bl; /* lookup bits for tl */
+ int bd; /* lookup bits for td */
+ unsigned int l[288]; /* length list for huft_build */
+
+ /* set up literal table */
+ for (i = 0; i < 144; i++) {
+ l[i] = 8;
+ }
+ for (; i < 256; i++) {
+ l[i] = 9;
+ }
+ for (; i < 280; i++) {
+ l[i] = 7;
+ }
+ for (; i < 288; i++) { /* make a complete, but wrong code set */
+ l[i] = 8;
+ }
+ bl = 7;
+ if ((i = huft_build(l, 288, 257, cplens, cplext, &tl, &bl)) != 0) {
+ return i;
}
- case 1: /* Inflate fixed
- * decompress an inflated type 1 (fixed Huffman codes) block. We should
- * either replace this with a custom decoder, or at least precompute the
- * Huffman tables.
- */
- {
- int i; /* temporary variable */
- huft_t *tl; /* literal/length code table */
- huft_t *td; /* distance code table */
- int bl; /* lookup bits for tl */
- int bd; /* lookup bits for td */
- unsigned int l[288]; /* length list for huft_build */
-
- /* set up literal table */
- for (i = 0; i < 144; i++) {
- l[i] = 8;
- }
- for (; i < 256; i++) {
- l[i] = 9;
- }
- for (; i < 280; i++) {
- l[i] = 7;
- }
- for (; i < 288; i++) { /* make a complete, but wrong code set */
- l[i] = 8;
- }
- bl = 7;
- if ((i = huft_build(l, 288, 257, cplens, cplext, &tl, &bl)) != 0) {
- return i;
- }
- /* set up distance table */
- for (i = 0; i < 30; i++) { /* make an incomplete code set */
- l[i] = 5;
- }
- bd = 5;
- if ((i = huft_build(l, 30, 0, cpdist, cpdext, &td, &bd)) > 1) {
- huft_free(tl);
- return i;
- }
+ /* set up distance table */
+ for (i = 0; i < 30; i++) { /* make an incomplete code set */
+ l[i] = 5;
+ }
+ bd = 5;
+ if ((i = huft_build(l, 30, 0, cpdist, cpdext, &td, &bd)) > 1) {
+ huft_free(tl);
+ return i;
+ }
- /* decompress until an end-of-block code */
- if (inflate_codes(tl, td, bl, bd))
- return 1;
+ /* decompress until an end-of-block code */
+ if (inflate_codes(tl, td, bl, bd))
+ return 1;
- /* free the decoding tables, return */
- huft_free(tl);
- huft_free(td);
- return 0;
+ /* free the decoding tables, return */
+ huft_free(tl);
+ huft_free(td);
+ return 0;
+ }
+ case 2: /* Inflate dynamic */
+ {
+ const int dbits = 6; /* bits in base distance lookup table */
+ const int lbits = 9; /* bits in base literal/length lookup table */
+
+ int i; /* temporary variables */
+ unsigned j;
+ unsigned l; /* last length */
+ unsigned m; /* mask for bit lengths table */
+ unsigned n; /* number of lengths to get */
+ huft_t *tl; /* literal/length code table */
+ huft_t *td; /* distance code table */
+ int bl; /* lookup bits for tl */
+ int bd; /* lookup bits for td */
+ unsigned nb; /* number of bit length codes */
+ unsigned nl; /* number of literal/length codes */
+ unsigned nd; /* number of distance codes */
+
+ unsigned ll[286 + 30]; /* literal/length and distance code lengths */
+ register unsigned long b_dynamic; /* bit buffer */
+ register unsigned k_dynamic; /* number of bits in bit buffer */
+
+ /* make local bit buffer */
+ b_dynamic = bb;
+ k_dynamic = bk;
+
+ /* read in table lengths */
+ while (k_dynamic < 5) {
+ b_dynamic |= ((unsigned long) fgetc(in_file)) << k_dynamic;
+ k_dynamic += 8;
+ }
+ nl = 257 + ((unsigned) b_dynamic & 0x1f); /* number of literal/length codes */
+ b_dynamic >>= 5;
+ k_dynamic -= 5;
+ while (k_dynamic < 5) {
+ b_dynamic |= ((unsigned long) fgetc(in_file)) << k_dynamic;
+ k_dynamic += 8;
+ }
+ nd = 1 + ((unsigned) b_dynamic & 0x1f); /* number of distance codes */
+ b_dynamic >>= 5;
+ k_dynamic -= 5;
+ while (k_dynamic < 4) {
+ b_dynamic |= ((unsigned long) fgetc(in_file)) << k_dynamic;
+ k_dynamic += 8;
+ }
+ nb = 4 + ((unsigned) b_dynamic & 0xf); /* number of bit length codes */
+ b_dynamic >>= 4;
+ k_dynamic -= 4;
+ if (nl > 286 || nd > 30) {
+ return 1; /* bad lengths */
}
- case 2: /* Inflate dynamic */
- {
- const int dbits = 6; /* bits in base distance lookup table */
- const int lbits = 9; /* bits in base literal/length lookup table */
-
- int i; /* temporary variables */
- unsigned j;
- unsigned l; /* last length */
- unsigned m; /* mask for bit lengths table */
- unsigned n; /* number of lengths to get */
- huft_t *tl; /* literal/length code table */
- huft_t *td; /* distance code table */
- int bl; /* lookup bits for tl */
- int bd; /* lookup bits for td */
- unsigned nb; /* number of bit length codes */
- unsigned nl; /* number of literal/length codes */
- unsigned nd; /* number of distance codes */
-
- unsigned ll[286 + 30]; /* literal/length and distance code lengths */
- register unsigned long b_dynamic; /* bit buffer */
- register unsigned k_dynamic; /* number of bits in bit buffer */
-
- /* make local bit buffer */
- b_dynamic = bb;
- k_dynamic = bk;
-
- /* read in table lengths */
- while (k_dynamic < 5) {
- b_dynamic |= ((unsigned long)fgetc(in_file)) << k_dynamic;
+
+ /* read in bit-length-code lengths */
+ for (j = 0; j < nb; j++) {
+ while (k_dynamic < 3) {
+ b_dynamic |= ((unsigned long) fgetc(in_file)) << k_dynamic;
k_dynamic += 8;
}
- nl = 257 + ((unsigned) b_dynamic & 0x1f); /* number of literal/length codes */
- b_dynamic >>= 5;
- k_dynamic -= 5;
- while (k_dynamic < 5) {
- b_dynamic |= ((unsigned long)fgetc(in_file)) << k_dynamic;
- k_dynamic += 8;
+ ll[border[j]] = (unsigned) b_dynamic & 7;
+ b_dynamic >>= 3;
+ k_dynamic -= 3;
+ }
+ for (; j < 19; j++) {
+ ll[border[j]] = 0;
+ }
+
+ /* build decoding table for trees--single level, 7 bit lookup */
+ bl = 7;
+ if ((i = huft_build(ll, 19, 19, NULL, NULL, &tl, &bl)) != 0) {
+ if (i == 1) {
+ huft_free(tl);
}
- nd = 1 + ((unsigned) b_dynamic & 0x1f); /* number of distance codes */
- b_dynamic >>= 5;
- k_dynamic -= 5;
- while (k_dynamic < 4) {
- b_dynamic |= ((unsigned long)fgetc(in_file)) << k_dynamic;
+ return i; /* incomplete code set */
+ }
+
+ /* read in literal and distance code lengths */
+ n = nl + nd;
+ m = mask_bits[bl];
+ i = l = 0;
+ while ((unsigned) i < n) {
+ while (k_dynamic < (unsigned) bl) {
+ b_dynamic |= ((unsigned long) fgetc(in_file)) << k_dynamic;
k_dynamic += 8;
}
- nb = 4 + ((unsigned) b_dynamic & 0xf); /* number of bit length codes */
- b_dynamic >>= 4;
- k_dynamic -= 4;
- if (nl > 286 || nd > 30) {
- return 1; /* bad lengths */
- }
-
- /* read in bit-length-code lengths */
- for (j = 0; j < nb; j++) {
+ j = (td = tl + ((unsigned) b_dynamic & m))->b;
+ b_dynamic >>= j;
+ k_dynamic -= j;
+ j = td->v.n;
+ if (j < 16) { /* length of code in bits (0..15) */
+ ll[i++] = l = j; /* save last length in l */
+ } else if (j == 16) { /* repeat last length 3 to 6 times */
+ while (k_dynamic < 2) {
+ b_dynamic |=
+ ((unsigned long) fgetc(in_file)) << k_dynamic;
+ k_dynamic += 8;
+ }
+ j = 3 + ((unsigned) b_dynamic & 3);
+ b_dynamic >>= 2;
+ k_dynamic -= 2;
+ if ((unsigned) i + j > n) {
+ return 1;
+ }
+ while (j--) {
+ ll[i++] = l;
+ }
+ } else if (j == 17) { /* 3 to 10 zero length codes */
while (k_dynamic < 3) {
- b_dynamic |= ((unsigned long)fgetc(in_file)) << k_dynamic;
+ b_dynamic |=
+ ((unsigned long) fgetc(in_file)) << k_dynamic;
k_dynamic += 8;
}
- ll[border[j]] = (unsigned) b_dynamic & 7;
+ j = 3 + ((unsigned) b_dynamic & 7);
b_dynamic >>= 3;
k_dynamic -= 3;
- }
- for (; j < 19; j++) {
- ll[border[j]] = 0;
- }
-
- /* build decoding table for trees--single level, 7 bit lookup */
- bl = 7;
- if ((i = huft_build(ll, 19, 19, NULL, NULL, &tl, &bl)) != 0) {
- if (i == 1) {
- huft_free(tl);
+ if ((unsigned) i + j > n) {
+ return 1;
}
- return i; /* incomplete code set */
- }
-
- /* read in literal and distance code lengths */
- n = nl + nd;
- m = mask_bits[bl];
- i = l = 0;
- while ((unsigned) i < n) {
- while (k_dynamic < (unsigned) bl) {
- b_dynamic |= ((unsigned long)fgetc(in_file)) << k_dynamic;
+ while (j--) {
+ ll[i++] = 0;
+ }
+ l = 0;
+ } else { /* j == 18: 11 to 138 zero length codes */
+ while (k_dynamic < 7) {
+ b_dynamic |=
+ ((unsigned long) fgetc(in_file)) << k_dynamic;
k_dynamic += 8;
}
- j = (td = tl + ((unsigned) b_dynamic & m))->b;
- b_dynamic >>= j;
- k_dynamic -= j;
- j = td->v.n;
- if (j < 16) { /* length of code in bits (0..15) */
- ll[i++] = l = j; /* save last length in l */
+ j = 11 + ((unsigned) b_dynamic & 0x7f);
+ b_dynamic >>= 7;
+ k_dynamic -= 7;
+ if ((unsigned) i + j > n) {
+ return 1;
}
- else if (j == 16) { /* repeat last length 3 to 6 times */
- while (k_dynamic < 2) {
- b_dynamic |= ((unsigned long)fgetc(in_file)) << k_dynamic;
- k_dynamic += 8;
- }
- j = 3 + ((unsigned) b_dynamic & 3);
- b_dynamic >>= 2;
- k_dynamic -= 2;
- if ((unsigned) i + j > n) {
- return 1;
- }
- while (j--) {
- ll[i++] = l;
- }
- } else if (j == 17) { /* 3 to 10 zero length codes */
- while (k_dynamic < 3) {
- b_dynamic |= ((unsigned long)fgetc(in_file)) << k_dynamic;
- k_dynamic += 8;
- }
- j = 3 + ((unsigned) b_dynamic & 7);
- b_dynamic >>= 3;
- k_dynamic -= 3;
- if ((unsigned) i + j > n) {
- return 1;
- }
- while (j--) {
- ll[i++] = 0;
- }
- l = 0;
- } else { /* j == 18: 11 to 138 zero length codes */
- while (k_dynamic < 7) {
- b_dynamic |= ((unsigned long)fgetc(in_file)) << k_dynamic;
- k_dynamic += 8;
- }
- j = 11 + ((unsigned) b_dynamic & 0x7f);
- b_dynamic >>= 7;
- k_dynamic -= 7;
- if ((unsigned) i + j > n) {
- return 1;
- }
- while (j--) {
- ll[i++] = 0;
- }
- l = 0;
+ while (j--) {
+ ll[i++] = 0;
}
+ l = 0;
}
+ }
- /* free decoding table for trees */
- huft_free(tl);
+ /* free decoding table for trees */
+ huft_free(tl);
- /* restore the global bit buffer */
- bb = b_dynamic;
- bk = k_dynamic;
+ /* restore the global bit buffer */
+ bb = b_dynamic;
+ bk = k_dynamic;
- /* build the decoding tables for literal/length and distance codes */
- bl = lbits;
- if ((i = huft_build(ll, nl, 257, cplens, cplext, &tl, &bl)) != 0) {
- if (i == 1) {
- error_msg("Incomplete literal tree");
- huft_free(tl);
- }
- return i; /* incomplete code set */
- }
- bd = dbits;
- if ((i = huft_build(ll + nl, nd, 0, cpdist, cpdext, &td, &bd)) != 0) {
- if (i == 1) {
- error_msg("incomplete distance tree");
- huft_free(td);
- }
+ /* build the decoding tables for literal/length and distance codes */
+ bl = lbits;
+ if ((i = huft_build(ll, nl, 257, cplens, cplext, &tl, &bl)) != 0) {
+ if (i == 1) {
+ error_msg("Incomplete literal tree");
huft_free(tl);
- return i; /* incomplete code set */
}
-
- /* decompress until an end-of-block code */
- if (inflate_codes(tl, td, bl, bd))
- return 1;
-
- /* free the decoding tables, return */
+ return i; /* incomplete code set */
+ }
+ bd = dbits;
+ if ((i = huft_build(ll + nl, nd, 0, cpdist, cpdext, &td, &bd)) != 0) {
+ if (i == 1) {
+ error_msg("incomplete distance tree");
+ huft_free(td);
+ }
huft_free(tl);
- huft_free(td);
- return 0;
+ return i; /* incomplete code set */
}
+
+ /* decompress until an end-of-block code */
+ if (inflate_codes(tl, td, bl, bd))
+ return 1;
+
+ /* free the decoding tables, return */
+ huft_free(tl);
+ huft_free(td);
+ return 0;
+ }
default:
/* bad block type */
return 2;
@@ -853,7 +862,7 @@ static int inflate_block(int *e)
*
* GLOBAL VARIABLES: outcnt, bk, bb, hufts, inptr
*/
-extern int inflate(FILE *in, FILE *out)
+extern int inflate(FILE * in, FILE * out)
{
int e; /* last block flag */
int r; /* result code */
@@ -868,7 +877,7 @@ extern int inflate(FILE *in, FILE *out)
out_file = out;
/* Allocate all global buffers (for DYN_ALLOC option) */
- window = xmalloc((size_t)(((2L*WSIZE)+1L)*sizeof(unsigned char)));
+ window = xmalloc((size_t) (((2L * WSIZE) + 1L) * sizeof(unsigned char)));
bytes_out = 0L;
/* Create the crc table */
@@ -910,40 +919,35 @@ extern int inflate(FILE *in, FILE *out)
* The magic header has already been checked. The output buffer is cleared.
* in, out: input and output file descriptors
*/
-extern int unzip(FILE *l_in_file, FILE *l_out_file)
+extern int unzip(FILE * l_in_file, FILE * l_out_file)
{
unsigned char buf[8]; /* extended local header */
unsigned char flags; /* compression flags */
typedef void (*sig_type) (int);
unsigned short i;
- unsigned char magic [2];
+ unsigned char magic[2];
if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
(void) signal(SIGINT, (sig_type) abort_gzip);
}
-#ifdef SIGTERM
-// if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
-// (void) signal(SIGTERM, (sig_type) abort_gzip);
-// }
-#endif
#ifdef SIGHUP
if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
(void) signal(SIGHUP, (sig_type) abort_gzip);
}
#endif
- magic [0] = fgetc(l_in_file);
- magic [1] = fgetc(l_in_file);
-
+ magic[0] = fgetc(l_in_file);
+ magic[1] = fgetc(l_in_file);
+
#ifdef CONFIG_FEATURE_UNCOMPRESS
/* Magic header for compress files, 1F 9d = \037\235 */
- if (( magic [0] == 0x1F ) && ( magic [1] == 0x9d)) {
- return uncompress ( l_in_file, l_out_file );
+ if ((magic[0] == 0x1F) && (magic[1] == 0x9d)) {
+ return uncompress(l_in_file, l_out_file);
}
#endif
/* Magic header for gzip files, 1F 8B = \037\213 */
- if (( magic [0] != 0x1F ) || ( magic [1] != 0x8b)) {
+ if ((magic[0] != 0x1F) || (magic[1] != 0x8b)) {
error_msg("Invalid gzip magic");
return EXIT_FAILURE;
}
@@ -951,7 +955,7 @@ extern int unzip(FILE *l_in_file, FILE *l_out_file)
/* Check the compression method */
if (fgetc(l_in_file) != 8) {
error_msg("Unknown compression method");
- return(-1);
+ return (-1);
}
flags = (unsigned char) fgetc(l_in_file);
@@ -963,7 +967,8 @@ extern int unzip(FILE *l_in_file, FILE *l_out_file)
if (flags & 0x04) {
/* bit 2 set: extra field present */
- const unsigned short extra = fgetc(l_in_file) + (fgetc(l_in_file) << 8);
+ const unsigned short extra =
+ fgetc(l_in_file) + (fgetc(l_in_file) << 8);
for (i = 0; i < extra; i++) {
fgetc(l_in_file);
@@ -994,11 +999,14 @@ extern int unzip(FILE *l_in_file, FILE *l_out_file)
fread(buf, 1, 8, l_in_file);
/* Validate decompression - crc */
- if ((unsigned int)((buf[0] | (buf[1] << 8)) |((buf[2] | (buf[3] << 8)) << 16)) != (crc ^ 0xffffffffL)) {
+ if ((unsigned int) ((buf[0] | (buf[1] << 8)) |
+ ((buf[2] | (buf[3] << 8)) << 16)) !=
+ (crc ^ 0xffffffffL)) {
error_msg("invalid compressed data--crc error");
}
/* Validate decompression - size */
- if (((buf[4] | (buf[5] << 8)) |((buf[6] | (buf[7] << 8)) << 16)) != (unsigned long) bytes_out) {
+ if (((buf[4] | (buf[5] << 8)) | ((buf[6] | (buf[7] << 8)) << 16)) !=
+ (unsigned long) bytes_out) {
error_msg("invalid compressed data--length error");
}
@@ -1011,7 +1019,8 @@ extern int unzip(FILE *l_in_file, FILE *l_out_file)
extern void gz_close(int gunzip_pid)
{
if (kill(gunzip_pid, SIGTERM) == -1) {
- error_msg_and_die("*** Couldnt kill old gunzip process *** aborting");
+ error_msg_and_die
+ ("*** Couldnt kill old gunzip process *** aborting");
}
if (waitpid(gunzip_pid, NULL, 0) == -1) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 17:01:35 +0000