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-rw-r--r--lib/zlib_inflate/inflate_sync.c152
1 files changed, 0 insertions, 152 deletions
diff --git a/lib/zlib_inflate/inflate_sync.c b/lib/zlib_inflate/inflate_sync.c
deleted file mode 100644
index 61411ff89d61..000000000000
--- a/lib/zlib_inflate/inflate_sync.c
+++ /dev/null
@@ -1,152 +0,0 @@
1/* inflate.c -- zlib interface to inflate modules
2 * Copyright (C) 1995-1998 Mark Adler
3 * For conditions of distribution and use, see copyright notice in zlib.h
4 */
5
6#include <linux/zutil.h>
7#include "infblock.h"
8#include "infutil.h"
9
10#if 0
11int zlib_inflateSync(
12 z_streamp z
13)
14{
15 uInt n; /* number of bytes to look at */
16 Byte *p; /* pointer to bytes */
17 uInt m; /* number of marker bytes found in a row */
18 uLong r, w; /* temporaries to save total_in and total_out */
19
20 /* set up */
21 if (z == NULL || z->state == NULL)
22 return Z_STREAM_ERROR;
23 if (z->state->mode != I_BAD)
24 {
25 z->state->mode = I_BAD;
26 z->state->sub.marker = 0;
27 }
28 if ((n = z->avail_in) == 0)
29 return Z_BUF_ERROR;
30 p = z->next_in;
31 m = z->state->sub.marker;
32
33 /* search */
34 while (n && m < 4)
35 {
36 static const Byte mark[4] = {0, 0, 0xff, 0xff};
37 if (*p == mark[m])
38 m++;
39 else if (*p)
40 m = 0;
41 else
42 m = 4 - m;
43 p++, n--;
44 }
45
46 /* restore */
47 z->total_in += p - z->next_in;
48 z->next_in = p;
49 z->avail_in = n;
50 z->state->sub.marker = m;
51
52 /* return no joy or set up to restart on a new block */
53 if (m != 4)
54 return Z_DATA_ERROR;
55 r = z->total_in; w = z->total_out;
56 zlib_inflateReset(z);
57 z->total_in = r; z->total_out = w;
58 z->state->mode = BLOCKS;
59 return Z_OK;
60}
61#endif /* 0 */
62
63
64/* Returns true if inflate is currently at the end of a block generated
65 * by Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
66 * implementation to provide an additional safety check. PPP uses Z_SYNC_FLUSH
67 * but removes the length bytes of the resulting empty stored block. When
68 * decompressing, PPP checks that at the end of input packet, inflate is
69 * waiting for these length bytes.
70 */
71#if 0
72int zlib_inflateSyncPoint(
73 z_streamp z
74)
75{
76 if (z == NULL || z->state == NULL || z->state->blocks == NULL)
77 return Z_STREAM_ERROR;
78 return zlib_inflate_blocks_sync_point(z->state->blocks);
79}
80#endif /* 0 */
81
82/*
83 * This subroutine adds the data at next_in/avail_in to the output history
84 * without performing any output. The output buffer must be "caught up";
85 * i.e. no pending output (hence s->read equals s->write), and the state must
86 * be BLOCKS (i.e. we should be willing to see the start of a series of
87 * BLOCKS). On exit, the output will also be caught up, and the checksum
88 * will have been updated if need be.
89 */
90static int zlib_inflate_addhistory(inflate_blocks_statef *s,
91 z_stream *z)
92{
93 uLong b; /* bit buffer */ /* NOT USED HERE */
94 uInt k; /* bits in bit buffer */ /* NOT USED HERE */
95 uInt t; /* temporary storage */
96 Byte *p; /* input data pointer */
97 uInt n; /* bytes available there */
98 Byte *q; /* output window write pointer */
99 uInt m; /* bytes to end of window or read pointer */
100
101 if (s->read != s->write)
102 return Z_STREAM_ERROR;
103 if (s->mode != TYPE)
104 return Z_DATA_ERROR;
105
106 /* we're ready to rock */
107 LOAD
108 /* while there is input ready, copy to output buffer, moving
109 * pointers as needed.
110 */
111 while (n) {
112 t = n; /* how many to do */
113 /* is there room until end of buffer? */
114 if (t > m) t = m;
115 /* update check information */
116 if (s->checkfn != NULL)
117 s->check = (*s->checkfn)(s->check, q, t);
118 memcpy(q, p, t);
119 q += t;
120 p += t;
121 n -= t;
122 z->total_out += t;
123 s->read = q; /* drag read pointer forward */
124/* WWRAP */ /* expand WWRAP macro by hand to handle s->read */
125 if (q == s->end) {
126 s->read = q = s->window;
127 m = WAVAIL;
128 }
129 }
130 UPDATE
131 return Z_OK;
132}
133
134
135/*
136 * This subroutine adds the data at next_in/avail_in to the output history
137 * without performing any output. The output buffer must be "caught up";
138 * i.e. no pending output (hence s->read equals s->write), and the state must
139 * be BLOCKS (i.e. we should be willing to see the start of a series of
140 * BLOCKS). On exit, the output will also be caught up, and the checksum
141 * will have been updated if need be.
142 */
143
144int zlib_inflateIncomp(
145 z_stream *z
146
147)
148{
149 if (z->state->mode != BLOCKS)
150 return Z_DATA_ERROR;
151 return zlib_inflate_addhistory(z->state->blocks, z);
152}