Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: galaxys-port
Fetching contributors…

Cannot retrieve contributors at this time

file 176 lines (148 sloc) 3.665 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176
#ifdef STATIC
/* Pre-boot environment: included */

/* prevent inclusion of _LINUX_KERNEL_H in pre-boot environment: lots
* errors about console_printk etc... on ARM */
#define _LINUX_KERNEL_H

#include "zlib_inflate/inftrees.c"
#include "zlib_inflate/inffast.c"
#include "zlib_inflate/inflate.c"

#else /* STATIC */
/* initramfs et al: linked */

#include <linux/zutil.h>

#include "zlib_inflate/inftrees.h"
#include "zlib_inflate/inffast.h"
#include "zlib_inflate/inflate.h"

#include "zlib_inflate/infutil.h"
#include <linux/slab.h>

#endif /* STATIC */

#include <linux/decompress/mm.h>

#define GZIP_IOBUF_SIZE (16*1024)

static int nofill(void *buffer, unsigned int len)
{
return -1;
}

/* Included from initramfs et al code */
STATIC int INIT gunzip(unsigned char *buf, int len,
int(*fill)(void*, unsigned int),
int(*flush)(void*, unsigned int),
unsigned char *out_buf,
int *pos,
void(*error_fn)(char *x)) {
u8 *zbuf;
struct z_stream_s *strm;
int rc;
size_t out_len;

set_error_fn(error_fn);
rc = -1;
if (flush) {
out_len = 0x8000; /* 32 K */
out_buf = malloc(out_len);
} else {
out_len = 0x7fffffff; /* no limit */
}
if (!out_buf) {
error("Out of memory while allocating output buffer");
goto gunzip_nomem1;
}

if (buf)
zbuf = buf;
else {
zbuf = malloc(GZIP_IOBUF_SIZE);
len = 0;
}
if (!zbuf) {
error("Out of memory while allocating input buffer");
goto gunzip_nomem2;
}

strm = malloc(sizeof(*strm));
if (strm == NULL) {
error("Out of memory while allocating z_stream");
goto gunzip_nomem3;
}

strm->workspace = malloc(flush ? zlib_inflate_workspacesize() :
sizeof(struct inflate_state));
if (strm->workspace == NULL) {
error("Out of memory while allocating workspace");
goto gunzip_nomem4;
}

if (!fill)
fill = nofill;

if (len == 0)
len = fill(zbuf, GZIP_IOBUF_SIZE);

/* verify the gzip header */
if (len < 10 ||
zbuf[0] != 0x1f || zbuf[1] != 0x8b || zbuf[2] != 0x08) {
if (pos)
*pos = 0;
error("Not a gzip file");
goto gunzip_5;
}

/* skip over gzip header (1f,8b,08... 10 bytes total +
* possible asciz filename)
*/
strm->next_in = zbuf + 10;
/* skip over asciz filename */
if (zbuf[3] & 0x8) {
while (strm->next_in[0])
strm->next_in++;
strm->next_in++;
}
strm->avail_in = len - (strm->next_in - zbuf);

strm->next_out = out_buf;
strm->avail_out = out_len;

rc = zlib_inflateInit2(strm, -MAX_WBITS);

if (!flush) {
WS(strm)->inflate_state.wsize = 0;
WS(strm)->inflate_state.window = NULL;
}

while (rc == Z_OK) {
if (strm->avail_in == 0) {
/* TODO: handle case where both pos and fill are set */
len = fill(zbuf, GZIP_IOBUF_SIZE);
if (len < 0) {
rc = -1;
error("read error");
break;
}
strm->next_in = zbuf;
strm->avail_in = len;
}
rc = zlib_inflate(strm, 0);

/* Write any data generated */
if (flush && strm->next_out > out_buf) {
int l = strm->next_out - out_buf;
if (l != flush(out_buf, l)) {
rc = -1;
error("write error");
break;
}
strm->next_out = out_buf;
strm->avail_out = out_len;
}

/* after Z_FINISH, only Z_STREAM_END is "we unpacked it all" */
if (rc == Z_STREAM_END) {
rc = 0;
break;
} else if (rc != Z_OK) {
error("uncompression error");
rc = -1;
}
}

zlib_inflateEnd(strm);
if (pos)
/* add + 8 to skip over trailer */
*pos = strm->next_in - zbuf+8;

gunzip_5:
free(strm->workspace);
gunzip_nomem4:
free(strm);
gunzip_nomem3:
if (!buf)
free(zbuf);
gunzip_nomem2:
if (flush)
free(out_buf);
gunzip_nomem1:
return rc; /* returns Z_OK (0) if successful */
}

#define decompress gunzip
Something went wrong with that request. Please try again.