diff options
author | Denys Vlasenko <vda.linux@googlemail.com> | 2007-09-30 17:56:49 -0700 |
---|---|---|
committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:53:57 -0700 |
commit | 8336793baf962163c9fab5a3f39614295fdbab27 (patch) | |
tree | 6940426f8880928444e227d43085ca3d2fbfba80 /lib/zlib_inflate/inflate.c | |
parent | b3448b0bde5f1a858397fe791f76632e978a1dc8 (diff) |
[ZLIB]: Move bnx2 driver gzip unpacker into zlib.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/zlib_inflate/inflate.c')
-rw-r--r-- | lib/zlib_inflate/inflate.c | 55 |
1 files changed, 51 insertions, 4 deletions
diff --git a/lib/zlib_inflate/inflate.c b/lib/zlib_inflate/inflate.c index 7e1e3114a73..0ad1ebf0094 100644 --- a/lib/zlib_inflate/inflate.c +++ b/lib/zlib_inflate/inflate.c @@ -332,14 +332,14 @@ static int zlib_inflateSyncPacket(z_streamp strm) int zlib_inflate(z_streamp strm, int flush) { struct inflate_state *state; - unsigned char *next; /* next input */ - unsigned char *put; /* next output */ + const unsigned char *next; /* next input */ + unsigned char *put; /* next output */ unsigned have, left; /* available input and output */ unsigned long hold; /* bit buffer */ unsigned bits; /* bits in bit buffer */ unsigned in, out; /* save starting available input and output */ unsigned copy; /* number of stored or match bytes to copy */ - unsigned char *from; /* where to copy match bytes from */ + unsigned char *from; /* where to copy match bytes from */ code this; /* current decoding table entry */ code last; /* parent table entry */ unsigned len; /* length to copy for repeats, bits to drop */ @@ -897,7 +897,7 @@ int zlib_inflateIncomp(z_stream *z) /* Setup some variables to allow misuse of updateWindow */ z->avail_out = 0; - z->next_out = z->next_in + z->avail_in; + z->next_out = (unsigned char*)z->next_in + z->avail_in; zlib_updatewindow(z, z->avail_in); @@ -916,3 +916,50 @@ int zlib_inflateIncomp(z_stream *z) return Z_OK; } + +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> + +/* Utility function: initialize zlib, unpack binary blob, clean up zlib, + * return len or negative error code. */ +int zlib_inflate_blob(void *gunzip_buf, unsigned sz, const void *buf, unsigned len) +{ + const u8 *zbuf = buf; + struct z_stream_s *strm; + int rc; + + rc = -ENOMEM; + strm = kmalloc(sizeof(*strm), GFP_KERNEL); + if (strm == NULL) + goto gunzip_nomem1; + strm->workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL); + if (strm->workspace == NULL) + goto gunzip_nomem2; + + /* gzip header (1f,8b,08... 10 bytes total + possible asciz filename) + * expected to be stripped from input */ + + strm->next_in = zbuf; + strm->avail_in = len; + strm->next_out = gunzip_buf; + strm->avail_out = sz; + + rc = zlib_inflateInit2(strm, -MAX_WBITS); + if (rc == Z_OK) { + rc = zlib_inflate(strm, Z_FINISH); + /* after Z_FINISH, only Z_STREAM_END is "we unpacked it all" */ + if (rc == Z_STREAM_END) + rc = sz - strm->avail_out; + else + rc = -EINVAL; + zlib_inflateEnd(strm); + } else + rc = -EINVAL; + + kfree(strm->workspace); +gunzip_nomem2: + kfree(strm); +gunzip_nomem1: + return rc; /* returns Z_OK (0) if successful */ +} |