decompress_unzip: preparatory patch
This commit is contained in:
Denis Vlasenko
parent
3376298b59
commit
cc33ef12d2
@ -50,7 +50,7 @@ off_t gunzip_bytes_out; /* number of output bytes */
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uint32_t gunzip_crc;
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static int gunzip_src_fd;
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static unsigned int gunzip_outbuf_count; /* bytes in output buffer */
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static unsigned gunzip_outbuf_count; /* bytes in output buffer */
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/* gunzip_window size--must be a power of two, and
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* at least 32K for zip's deflate method */
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@ -64,14 +64,14 @@ static uint32_t *gunzip_crc_table;
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#define N_MAX 288 /* maximum number of codes in any set */
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/* bitbuffer */
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static unsigned int gunzip_bb; /* bit buffer */
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static unsigned gunzip_bb; /* bit buffer */
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static unsigned char gunzip_bk; /* bits in bit buffer */
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/* These control the size of the bytebuffer */
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static unsigned int bytebuffer_max = 0x8000;
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static unsigned bytebuffer_max = 0x8000;
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static unsigned char *bytebuffer = NULL;
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static unsigned int bytebuffer_offset = 0;
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static unsigned int bytebuffer_size = 0;
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static unsigned bytebuffer_offset = 0;
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static unsigned bytebuffer_size = 0;
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static const unsigned short mask_bits[] = {
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0x0000, 0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
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@ -109,7 +109,7 @@ static const unsigned char border[] = {
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16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
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};
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static unsigned int fill_bitbuffer(unsigned int bitbuffer, unsigned int *current, const unsigned int required)
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static unsigned fill_bitbuffer(unsigned bitbuffer, unsigned *current, const unsigned required)
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{
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while (*current < required) {
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if (bytebuffer_offset >= bytebuffer_size) {
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@ -121,7 +121,7 @@ static unsigned int fill_bitbuffer(unsigned int bitbuffer, unsigned int *current
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bytebuffer_size += 4;
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bytebuffer_offset = 4;
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}
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bitbuffer |= ((unsigned int) bytebuffer[bytebuffer_offset]) << *current;
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bitbuffer |= ((unsigned) bytebuffer[bytebuffer_offset]) << *current;
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bytebuffer_offset++;
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*current += 8;
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}
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@ -164,9 +164,9 @@ static int huft_free(huft_t * t)
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* m: maximum lookup bits, returns actual
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*/
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static
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int huft_build(unsigned int *b, const unsigned int n,
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const unsigned int s, const unsigned short *d,
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const unsigned char *e, huft_t ** t, unsigned int *m)
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int huft_build(unsigned *b, const unsigned n,
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const unsigned s, const unsigned short *d,
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const unsigned char *e, huft_t ** t, unsigned *m)
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{
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unsigned a; /* counter for codes of length k */
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unsigned c[BMAX + 1]; /* bit length count table */
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@ -338,17 +338,17 @@ int huft_build(unsigned int *b, const unsigned int n,
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* tl, td: literal/length and distance decoder tables
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* bl, bd: number of bits decoded by tl[] and td[]
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*/
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static int inflate_codes(huft_t * my_tl, huft_t * my_td, const unsigned int my_bl, const unsigned int my_bd, int setup)
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static int inflate_codes(huft_t * my_tl, huft_t * my_td, const unsigned my_bl, const unsigned my_bd, int setup)
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{
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static unsigned int e; /* table entry flag/number of extra bits */
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static unsigned int n, d; /* length and index for copy */
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static unsigned int w; /* current gunzip_window position */
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static unsigned e; /* table entry flag/number of extra bits */
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static unsigned n, d; /* length and index for copy */
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static unsigned w; /* current gunzip_window position */
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static huft_t *t; /* pointer to table entry */
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static unsigned int ml, md; /* masks for bl and bd bits */
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static unsigned int b; /* bit buffer */
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static unsigned int k; /* number of bits in bit buffer */
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static unsigned ml, md; /* masks for bl and bd bits */
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static unsigned b; /* bit buffer */
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static unsigned k; /* number of bits in bit buffer */
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static huft_t *tl, *td;
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static unsigned int bl, bd;
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static unsigned bl, bd;
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static int resumeCopy = 0;
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if (setup) { // 1st time we are called, copy in variables
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@ -471,7 +471,7 @@ do_copy: do {
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static int inflate_stored(int my_n, int my_b_stored, int my_k_stored, int setup)
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{
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static unsigned int n, b_stored, k_stored, w;
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static unsigned n, b_stored, k_stored, w;
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if (setup) {
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n = my_n;
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b_stored = my_b_stored;
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@ -513,8 +513,8 @@ static int inflate_stored(int my_n, int my_b_stored, int my_k_stored, int setup)
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static int inflate_block(int *e)
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{
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unsigned t; /* block type */
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unsigned int b; /* bit buffer */
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unsigned int k; /* number of bits in bit buffer */
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unsigned b; /* bit buffer */
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unsigned k; /* number of bits in bit buffer */
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/* make local bit buffer */
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@ -541,9 +541,9 @@ static int inflate_block(int *e)
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switch (t) {
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case 0: /* Inflate stored */
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{
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unsigned int n; /* number of bytes in block */
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unsigned int b_stored; /* bit buffer */
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unsigned int k_stored; /* number of bits in bit buffer */
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unsigned n; /* number of bytes in block */
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unsigned b_stored; /* bit buffer */
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unsigned k_stored; /* number of bits in bit buffer */
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/* make local copies of globals */
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b_stored = gunzip_bb; /* initialize bit buffer */
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@ -579,9 +579,9 @@ static int inflate_block(int *e)
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int i; /* temporary variable */
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huft_t *tl; /* literal/length code table */
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huft_t *td; /* distance code table */
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unsigned int bl; /* lookup bits for tl */
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unsigned int bd; /* lookup bits for td */
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unsigned int l[288]; /* length list for huft_build */
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unsigned bl; /* lookup bits for tl */
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unsigned bd; /* lookup bits for td */
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unsigned l[288]; /* length list for huft_build */
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/* set up literal table */
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for (i = 0; i < 144; i++) {
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@ -625,20 +625,20 @@ static int inflate_block(int *e)
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huft_t *tl; /* literal/length code table */
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huft_t *td; /* distance code table */
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unsigned int i; /* temporary variables */
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unsigned int j;
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unsigned int l; /* last length */
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unsigned int m; /* mask for bit lengths table */
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unsigned int n; /* number of lengths to get */
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unsigned int bl; /* lookup bits for tl */
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unsigned int bd; /* lookup bits for td */
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unsigned int nb; /* number of bit length codes */
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unsigned int nl; /* number of literal/length codes */
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unsigned int nd; /* number of distance codes */
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unsigned i; /* temporary variables */
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unsigned j;
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unsigned l; /* last length */
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unsigned m; /* mask for bit lengths table */
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unsigned n; /* number of lengths to get */
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unsigned bl; /* lookup bits for tl */
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unsigned bd; /* lookup bits for td */
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unsigned nb; /* number of bit length codes */
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unsigned nl; /* number of literal/length codes */
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unsigned nd; /* number of distance codes */
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unsigned int ll[286 + 30]; /* literal/length and distance code lengths */
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unsigned int b_dynamic; /* bit buffer */
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unsigned int k_dynamic; /* number of bits in bit buffer */
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unsigned ll[286 + 30]; /* literal/length and distance code lengths */
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unsigned b_dynamic; /* bit buffer */
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unsigned k_dynamic; /* number of bits in bit buffer */
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/* make local bit buffer */
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b_dynamic = gunzip_bb;
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@ -646,17 +646,17 @@ static int inflate_block(int *e)
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/* read in table lengths */
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b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 5);
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nl = 257 + ((unsigned int) b_dynamic & 0x1f); /* number of literal/length codes */
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nl = 257 + ((unsigned) b_dynamic & 0x1f); /* number of literal/length codes */
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b_dynamic >>= 5;
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k_dynamic -= 5;
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b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 5);
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nd = 1 + ((unsigned int) b_dynamic & 0x1f); /* number of distance codes */
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nd = 1 + ((unsigned) b_dynamic & 0x1f); /* number of distance codes */
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b_dynamic >>= 5;
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k_dynamic -= 5;
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b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 4);
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nb = 4 + ((unsigned int) b_dynamic & 0xf); /* number of bit length codes */
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nb = 4 + ((unsigned) b_dynamic & 0xf); /* number of bit length codes */
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b_dynamic >>= 4;
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k_dynamic -= 4;
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@ -667,7 +667,7 @@ static int inflate_block(int *e)
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/* read in bit-length-code lengths */
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for (j = 0; j < nb; j++) {
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b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 3);
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ll[border[j]] = (unsigned int) b_dynamic & 7;
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ll[border[j]] = (unsigned) b_dynamic & 7;
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b_dynamic >>= 3;
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k_dynamic -= 3;
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}
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@ -689,9 +689,9 @@ static int inflate_block(int *e)
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n = nl + nd;
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m = mask_bits[bl];
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i = l = 0;
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while ((unsigned int) i < n) {
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b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, (unsigned int)bl);
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j = (td = tl + ((unsigned int) b_dynamic & m))->b;
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while ((unsigned) i < n) {
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b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, (unsigned)bl);
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j = (td = tl + ((unsigned) b_dynamic & m))->b;
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b_dynamic >>= j;
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k_dynamic -= j;
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j = td->v.n;
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@ -699,10 +699,10 @@ static int inflate_block(int *e)
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ll[i++] = l = j; /* save last length in l */
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} else if (j == 16) { /* repeat last length 3 to 6 times */
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b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 2);
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j = 3 + ((unsigned int) b_dynamic & 3);
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j = 3 + ((unsigned) b_dynamic & 3);
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b_dynamic >>= 2;
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k_dynamic -= 2;
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if ((unsigned int) i + j > n) {
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if ((unsigned) i + j > n) {
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return 1;
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}
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while (j--) {
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@ -710,10 +710,10 @@ static int inflate_block(int *e)
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}
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} else if (j == 17) { /* 3 to 10 zero length codes */
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b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 3);
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j = 3 + ((unsigned int) b_dynamic & 7);
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j = 3 + ((unsigned) b_dynamic & 7);
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b_dynamic >>= 3;
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k_dynamic -= 3;
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if ((unsigned int) i + j > n) {
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if ((unsigned) i + j > n) {
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return 1;
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}
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while (j--) {
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@ -722,10 +722,10 @@ static int inflate_block(int *e)
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l = 0;
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} else { /* j == 18: 11 to 138 zero length codes */
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b_dynamic = fill_bitbuffer(b_dynamic, &k_dynamic, 7);
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j = 11 + ((unsigned int) b_dynamic & 0x7f);
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j = 11 + ((unsigned) b_dynamic & 0x7f);
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b_dynamic >>= 7;
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k_dynamic -= 7;
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if ((unsigned int) i + j > n) {
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if ((unsigned) i + j > n) {
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return 1;
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}
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while (j--) {
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@ -824,7 +824,7 @@ static int inflate_get_next_window(void)
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}
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/* Initialise bytebuffer, be careful not to overfill the buffer */
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void inflate_init(unsigned int bufsize)
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void inflate_init(unsigned bufsize)
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{
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/* Set the bytebuffer size, default is same as gunzip_wsize */
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bytebuffer_max = bufsize + 8;
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@ -892,7 +892,7 @@ USE_DESKTOP(long long) int
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inflate_gunzip(int in, int out)
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{
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uint32_t stored_crc = 0;
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unsigned int count;
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unsigned count;
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USE_DESKTOP(long long total = )inflate_unzip(in, out);
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USE_DESKTOP(if (total < 0) return total;)
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