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linux-davinci-2.6.23
Commit 7054036f authored by Olaf Hering's avatar Olaf Hering Committed by Paul Mackerras
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[PATCH] ppc64 boot: remove zlib 

Switch ppc64 to the in-kernel zlib, it has less bugs than the current one.
The code in arch/ppc64/boot is compiled as 32bit, so it can not use the
includes from include/asm.

Copy all zlib related header files and convert them with sed.

Reduce the scratch size to 47k, check possible changes at runtime.
Signed-off-by: default avatarOlaf Hering <olh@suse.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 8afe31c9
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Showing with 44 additions and 2698 deletions
arch/ppc64/boot/Makefile
View file @ 7054036f
......@@ -27,10 +27,41 @@ BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
BOOTLFLAGS := -Ttext 0x00400000 -e _start -T $(srctree)/$(src)/zImage.lds
OBJCOPYFLAGS := contents,alloc,load,readonly,data
src-boot := crt0.S string.S prom.c main.c zlib.c imagesize.c div64.S
zlib := infblock.c infcodes.c inffast.c inflate.c inftrees.c infutil.c
zlibheader := infblock.h infcodes.h inffast.h inftrees.h infutil.h
zliblinuxheader := zlib.h zconf.h zutil.h
$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
#$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
src-boot := crt0.S string.S prom.c main.c imagesize.c div64.S
src-boot += $(zlib)
src-boot := $(addprefix $(obj)/, $(src-boot))
obj-boot := $(addsuffix .o, $(basename $(src-boot)))
BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj)
quiet_cmd_copy_zlib = COPY $@
cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
quiet_cmd_copy_zlibheader = COPY $@
cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
# stddef.h for NULL
quiet_cmd_copy_zliblinuxheader = COPY $@
cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
$(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
$(call cmd,copy_zlib)
$(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
$(call cmd,copy_zlibheader)
$(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
$(call cmd,copy_zliblinuxheader)
clean-files := $(zlib) $(zlibheader) $(zliblinuxheader)
quiet_cmd_bootcc = BOOTCC $@
cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
......
arch/ppc64/boot/main.c
View file @ 7054036f
......@@ -26,12 +26,6 @@ extern void flush_cache(void *, unsigned long);
#define RAM_END (512<<20) // Fixme: use OF */
#define ONE_MB 0x100000
static char *avail_ram;
static char *begin_avail, *end_avail;
static char *avail_high;
static unsigned int heap_use;
static unsigned int heap_max;
extern char _start[];
extern char _end[];
extern char _vmlinux_start[];
......@@ -50,7 +44,8 @@ static struct addr_range vmlinux = {0, 0, 0};
static struct addr_range vmlinuz = {0, 0, 0};
static struct addr_range initrd = {0, 0, 0};
static char scratch[128<<10]; /* 128kB of scratch space for gunzip */
static char scratch[46912]; /* scratch space for gunzip, from zlib_inflate_workspacesize() */
typedef void (*kernel_entry_t)( unsigned long,
unsigned long,
......@@ -161,17 +156,12 @@ void start(unsigned long a1, unsigned long a2, void *promptr)
/* Eventually gunzip the kernel */
if (*(unsigned short *)vmlinuz.addr == 0x1f8b) {
int len;
avail_ram = scratch;
begin_avail = avail_high = avail_ram;
end_avail = scratch + sizeof(scratch);
printf("gunzipping (0x%lx <- 0x%lx:0x%0lx)...",
vmlinux.addr, vmlinuz.addr, vmlinuz.addr+vmlinuz.size);
len = vmlinuz.size;
gunzip((void *)vmlinux.addr, vmlinux.size,
(unsigned char *)vmlinuz.addr, &len);
printf("done 0x%lx bytes\n\r", len);
printf("0x%x bytes of heap consumed, max in use 0x%x\n\r",
(unsigned)(avail_high - begin_avail), heap_max);
} else {
memmove((void *)vmlinux.addr,(void *)vmlinuz.addr,vmlinuz.size);
}
......@@ -225,64 +215,12 @@ void start(unsigned long a1, unsigned long a2, void *promptr)
exit();
}
struct memchunk {
unsigned int size;
unsigned int pad;
struct memchunk *next;
};
static struct memchunk *freechunks;
void *zalloc(void *x, unsigned items, unsigned size)
{
void *p;
struct memchunk **mpp, *mp;
size *= items;
size = _ALIGN(size, sizeof(struct memchunk));
heap_use += size;
if (heap_use > heap_max)
heap_max = heap_use;
for (mpp = &freechunks; (mp = *mpp) != 0; mpp = &mp->next) {
if (mp->size == size) {
*mpp = mp->next;
return mp;
}
}
p = avail_ram;
avail_ram += size;
if (avail_ram > avail_high)
avail_high = avail_ram;
if (avail_ram > end_avail) {
printf("oops... out of memory\n\r");
pause();
}
return p;
}
void zfree(void *x, void *addr, unsigned nb)
{
struct memchunk *mp = addr;
nb = _ALIGN(nb, sizeof(struct memchunk));
heap_use -= nb;
if (avail_ram == addr + nb) {
avail_ram = addr;
return;
}
mp->size = nb;
mp->next = freechunks;
freechunks = mp;
}
#define HEAD_CRC 2
#define EXTRA_FIELD 4
#define ORIG_NAME 8
#define COMMENT 0x10
#define RESERVED 0xe0
#define DEFLATED 8
static void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
{
z_stream s;
......@@ -291,7 +229,7 @@ static void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
/* skip header */
i = 10;
flags = src[3];
if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
if (src[2] != Z_DEFLATED || (flags & RESERVED) != 0) {
printf("bad gzipped data\n\r");
exit();
}
......@@ -310,9 +248,13 @@ static void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
exit();
}
s.zalloc = zalloc;
s.zfree = zfree;
r = inflateInit2(&s, -MAX_WBITS);
if (zlib_inflate_workspacesize() > sizeof(scratch)) {
printf("gunzip needs more mem\n");
exit();
}
memset(&s, 0, sizeof(s));
s.workspace = scratch;
r = zlib_inflateInit2(&s, -MAX_WBITS);
if (r != Z_OK) {
printf("inflateInit2 returned %d\n\r", r);
exit();
......@@ -321,12 +263,12 @@ static void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
s.avail_in = *lenp - i;
s.next_out = dst;
s.avail_out = dstlen;
r = inflate(&s, Z_FINISH);
r = zlib_inflate(&s, Z_FINISH);
if (r != Z_OK && r != Z_STREAM_END) {
printf("inflate returned %d msg: %s\n\r", r, s.msg);
exit();
}
*lenp = s.next_out - (unsigned char *) dst;
inflateEnd(&s);
zlib_inflateEnd(&s);
}
arch/ppc64/boot/zlib.c deleted 100644 → 0
View file @ 8afe31c9
/*
* This file is derived from various .h and .c files from the zlib-0.95
* distribution by Jean-loup Gailly and Mark Adler, with some additions
* by Paul Mackerras to aid in implementing Deflate compression and
* decompression for PPP packets. See zlib.h for conditions of
* distribution and use.
*
* Changes that have been made include:
* - changed functions not used outside this file to "local"
* - added minCompression parameter to deflateInit2
* - added Z_PACKET_FLUSH (see zlib.h for details)
* - added inflateIncomp
*
Copyright (C) 1995 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Jean-loup Gailly Mark Adler
gzip@prep.ai.mit.edu madler@alumni.caltech.edu
*
*
*/
/*+++++*/
/* zutil.h -- internal interface and configuration of the compression library
* Copyright (C) 1995 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
/* From: zutil.h,v 1.9 1995/05/03 17:27:12 jloup Exp */
#define _Z_UTIL_H
#include "zlib.h"
#ifndef local
# define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */
#define FAR
typedef unsigned char uch;
typedef uch FAR uchf;
typedef unsigned short ush;
typedef ush FAR ushf;
typedef unsigned long ulg;
extern char *z_errmsg[]; /* indexed by 1-zlib_error */
#define ERR_RETURN(strm,err) return (strm->msg=z_errmsg[1-err], err)
/* To be used only when the state is known to be valid */
#ifndef NULL
#define NULL ((void *) 0)
#endif
/* common constants */
#define DEFLATED 8
#ifndef DEF_WBITS
# define DEF_WBITS MAX_WBITS
#endif
/* default windowBits for decompression. MAX_WBITS is for compression only */
#if MAX_MEM_LEVEL >= 8
# define DEF_MEM_LEVEL 8
#else
# define DEF_MEM_LEVEL MAX_MEM_LEVEL
#endif
/* default memLevel */
#define STORED_BLOCK 0
#define STATIC_TREES 1
#define DYN_TREES 2
/* The three kinds of block type */
#define MIN_MATCH 3
#define MAX_MATCH 258
/* The minimum and maximum match lengths */
/* functions */
extern void *memcpy(void *, const void *, unsigned long);
#define zmemcpy memcpy
/* Diagnostic functions */
#ifdef DEBUG_ZLIB
# include "stdio.h"
# ifndef verbose
# define verbose 0
# endif
# define Assert(cond,msg) {if(!(cond)) z_error(msg);}
# define Trace(x) fprintf x
# define Tracev(x) {if (verbose) fprintf x ;}
# define Tracevv(x) {if (verbose>1) fprintf x ;}
# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
#else
# define Assert(cond,msg)
# define Trace(x)
# define Tracev(x)
# define Tracevv(x)
# define Tracec(c,x)
# define Tracecv(c,x)
#endif
typedef uLong (*check_func) OF((uLong check, Bytef *buf, uInt len));
/* voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); */
/* void zcfree OF((voidpf opaque, voidpf ptr)); */
#define ZALLOC(strm, items, size) \
(*((strm)->zalloc))((strm)->opaque, (items), (size))
#define ZFREE(strm, addr, size) \
(*((strm)->zfree))((strm)->opaque, (voidpf)(addr), (size))
#define TRY_FREE(s, p, n) {if (p) ZFREE(s, p, n);}
/* deflate.h -- internal compression state
* Copyright (C) 1995 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
/*+++++*/
/* infblock.h -- header to use infblock.c
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
struct inflate_blocks_state;
typedef struct inflate_blocks_state FAR inflate_blocks_statef;
local inflate_blocks_statef * inflate_blocks_new OF((
z_stream *z,
check_func c, /* check function */
uInt w)); /* window size */
local int inflate_blocks OF((
inflate_blocks_statef *,
z_stream *,
int)); /* initial return code */
local void inflate_blocks_reset OF((
inflate_blocks_statef *,
z_stream *,
uLongf *)); /* check value on output */
local int inflate_blocks_free OF((
inflate_blocks_statef *,
z_stream *,
uLongf *)); /* check value on output */
local int inflate_addhistory OF((
inflate_blocks_statef *,
z_stream *));
local int inflate_packet_flush OF((
inflate_blocks_statef *));
/*+++++*/
/* inftrees.h -- header to use inftrees.c
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
/* Huffman code lookup table entry--this entry is four bytes for machines
that have 16-bit pointers (e.g. PC's in the small or medium model). */
typedef struct inflate_huft_s FAR inflate_huft;
struct inflate_huft_s {
union {
struct {
Byte Exop; /* number of extra bits or operation */
Byte Bits; /* number of bits in this code or subcode */
} what;
uInt Nalloc; /* number of these allocated here */
Bytef *pad; /* pad structure to a power of 2 (4 bytes for */
} word; /* 16-bit, 8 bytes for 32-bit machines) */
union {
uInt Base; /* literal, length base, or distance base */
inflate_huft *Next; /* pointer to next level of table */
} more;
};
#ifdef DEBUG_ZLIB
local uInt inflate_hufts;
#endif
local int inflate_trees_bits OF((
uIntf *, /* 19 code lengths */
uIntf *, /* bits tree desired/actual depth */
inflate_huft * FAR *, /* bits tree result */
z_stream *)); /* for zalloc, zfree functions */
local int inflate_trees_dynamic OF((
uInt, /* number of literal/length codes */
uInt, /* number of distance codes */
uIntf *, /* that many (total) code lengths */
uIntf *, /* literal desired/actual bit depth */
uIntf *, /* distance desired/actual bit depth */
inflate_huft * FAR *, /* literal/length tree result */
inflate_huft * FAR *, /* distance tree result */
z_stream *)); /* for zalloc, zfree functions */
local int inflate_trees_fixed OF((
uIntf *, /* literal desired/actual bit depth */
uIntf *, /* distance desired/actual bit depth */
inflate_huft * FAR *, /* literal/length tree result */
inflate_huft * FAR *)); /* distance tree result */
local int inflate_trees_free OF((
inflate_huft *, /* tables to free */
z_stream *)); /* for zfree function */
/*+++++*/
/* infcodes.h -- header to use infcodes.c
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
struct inflate_codes_state;
typedef struct inflate_codes_state FAR inflate_codes_statef;
local inflate_codes_statef *inflate_codes_new OF((
uInt, uInt,
inflate_huft *, inflate_huft *,
z_stream *));
local int inflate_codes OF((
inflate_blocks_statef *,
z_stream *,
int));
local void inflate_codes_free OF((
inflate_codes_statef *,
z_stream *));
/*+++++*/
/* inflate.c -- zlib interface to inflate modules
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* inflate private state */
struct internal_state {
/* mode */
enum {
METHOD, /* waiting for method byte */
FLAG, /* waiting for flag byte */
BLOCKS, /* decompressing blocks */
CHECK4, /* four check bytes to go */
CHECK3, /* three check bytes to go */
CHECK2, /* two check bytes to go */
CHECK1, /* one check byte to go */
DONE, /* finished check, done */
BAD} /* got an error--stay here */
mode; /* current inflate mode */
/* mode dependent information */
union {
uInt method; /* if FLAGS, method byte */
struct {
uLong was; /* computed check value */
uLong need; /* stream check value */
} check; /* if CHECK, check values to compare */
uInt marker; /* if BAD, inflateSync's marker bytes count */
} sub; /* submode */
/* mode independent information */
int nowrap; /* flag for no wrapper */
uInt wbits; /* log2(window size) (8..15, defaults to 15) */
inflate_blocks_statef
*blocks; /* current inflate_blocks state */
};
int inflateReset(
z_stream *z
)
{
uLong c;
if (z == Z_NULL || z->state == Z_NULL)
return Z_STREAM_ERROR;
z->total_in = z->total_out = 0;
z->msg = Z_NULL;
z->state->mode = z->state->nowrap ? BLOCKS : METHOD;
inflate_blocks_reset(z->state->blocks, z, &c);
Trace((stderr, "inflate: reset\n"));
return Z_OK;
}
int inflateEnd(
z_stream *z
)
{
uLong c;
if (z == Z_NULL || z->state == Z_NULL || z->zfree == Z_NULL)
return Z_STREAM_ERROR;
if (z->state->blocks != Z_NULL)
inflate_blocks_free(z->state->blocks, z, &c);
ZFREE(z, z->state, sizeof(struct internal_state));
z->state = Z_NULL;
Trace((stderr, "inflate: end\n"));
return Z_OK;
}
int inflateInit2(
z_stream *z,
int w
)
{
/* initialize state */
if (z == Z_NULL)
return Z_STREAM_ERROR;
/* if (z->zalloc == Z_NULL) z->zalloc = zcalloc; */
/* if (z->zfree == Z_NULL) z->zfree = zcfree; */
if ((z->state = (struct internal_state FAR *)
ZALLOC(z,1,sizeof(struct internal_state))) == Z_NULL)
return Z_MEM_ERROR;
z->state->blocks = Z_NULL;
/* handle undocumented nowrap option (no zlib header or check) */
z->state->nowrap = 0;
if (w < 0)
{
w = - w;
z->state->nowrap = 1;
}
/* set window size */
if (w < 8 || w > 15)
{
inflateEnd(z);
return Z_STREAM_ERROR;
}
z->state->wbits = (uInt)w;
/* create inflate_blocks state */
if ((z->state->blocks =
inflate_blocks_new(z, z->state->nowrap ? Z_NULL : adler32, 1 << w))
== Z_NULL)
{
inflateEnd(z);
return Z_MEM_ERROR;
}
Trace((stderr, "inflate: allocated\n"));
/* reset state */
inflateReset(z);
return Z_OK;
}
int inflateInit(
z_stream *z
)
{
return inflateInit2(z, DEF_WBITS);
}
#define NEEDBYTE {if(z->avail_in==0)goto empty;r=Z_OK;}
#define NEXTBYTE (z->avail_in--,z->total_in++,*z->next_in++)
int inflate(
z_stream *z,
int f
)
{
int r;
uInt b;
if (z == Z_NULL || z->next_in == Z_NULL)
return Z_STREAM_ERROR;
r = Z_BUF_ERROR;
while (1) switch (z->state->mode)
{
case METHOD:
NEEDBYTE
if (((z->state->sub.method = NEXTBYTE) & 0xf) != DEFLATED)
{
z->state->mode = BAD;
z->msg = "unknown compression method";
z->state->sub.marker = 5; /* can't try inflateSync */
break;
}
if ((z->state->sub.method >> 4) + 8 > z->state->wbits)
{
z->state->mode = BAD;
z->msg = "invalid window size";
z->state->sub.marker = 5; /* can't try inflateSync */
break;
}
z->state->mode = FLAG;
case FLAG:
NEEDBYTE
if ((b = NEXTBYTE) & 0x20)
{
z->state->mode = BAD;
z->msg = "invalid reserved bit";
z->state->sub.marker = 5; /* can't try inflateSync */
break;
}
if (((z->state->sub.method << 8) + b) % 31)
{
z->state->mode = BAD;
z->msg = "incorrect header check";
z->state->sub.marker = 5; /* can't try inflateSync */
break;
}
Trace((stderr, "inflate: zlib header ok\n"));
z->state->mode = BLOCKS;
case BLOCKS:
r = inflate_blocks(z->state->blocks, z, r);
if (f == Z_PACKET_FLUSH && z->avail_in == 0 && z->avail_out != 0)
r = inflate_packet_flush(z->state->blocks);
if (r == Z_DATA_ERROR)
{
z->state->mode = BAD;
z->state->sub.marker = 0; /* can try inflateSync */
break;
}
if (r != Z_STREAM_END)
return r;
r = Z_OK;
inflate_blocks_reset(z->state->blocks, z, &z->state->sub.check.was);
if (z->state->nowrap)
{
z->state->mode = DONE;
break;
}
z->state->mode = CHECK4;
case CHECK4:
NEEDBYTE
z->state->sub.check.need = (uLong)NEXTBYTE << 24;
z->state->mode = CHECK3;
case CHECK3:
NEEDBYTE
z->state->sub.check.need += (uLong)NEXTBYTE << 16;
z->state->mode = CHECK2;
case CHECK2:
NEEDBYTE
z->state->sub.check.need += (uLong)NEXTBYTE << 8;
z->state->mode = CHECK1;
case CHECK1:
NEEDBYTE
z->state->sub.check.need += (uLong)NEXTBYTE;
if (z->state->sub.check.was != z->state->sub.check.need)
{
z->state->mode = BAD;
z->msg = "incorrect data check";
z->state->sub.marker = 5; /* can't try inflateSync */
break;
}
Trace((stderr, "inflate: zlib check ok\n"));
z->state->mode = DONE;
case DONE:
return Z_STREAM_END;
case BAD:
return Z_DATA_ERROR;
default:
return Z_STREAM_ERROR;
}
empty:
if (f != Z_PACKET_FLUSH)
return r;
z->state->mode = BAD;
z->state->sub.marker = 0; /* can try inflateSync */
return Z_DATA_ERROR;
}
/*
* This subroutine adds the data at next_in/avail_in to the output history
* without performing any output. The output buffer must be "caught up";
* i.e. no pending output (hence s->read equals s->write), and the state must
* be BLOCKS (i.e. we should be willing to see the start of a series of
* BLOCKS). On exit, the output will also be caught up, and the checksum
* will have been updated if need be.
*/
int inflateIncomp(
z_stream *z
)
{
if (z->state->mode != BLOCKS)
return Z_DATA_ERROR;
return inflate_addhistory(z->state->blocks, z);
}
int inflateSync(
z_stream *z
)
{
uInt n; /* number of bytes to look at */
Bytef *p; /* pointer to bytes */
uInt m; /* number of marker bytes found in a row */
uLong r, w; /* temporaries to save total_in and total_out */
/* set up */
if (z == Z_NULL || z->state == Z_NULL)
return Z_STREAM_ERROR;
if (z->state->mode != BAD)
{
z->state->mode = BAD;
z->state->sub.marker = 0;
}
if ((n = z->avail_in) == 0)
return Z_BUF_ERROR;
p = z->next_in;
m = z->state->sub.marker;
/* search */
while (n && m < 4)
{
if (*p == (Byte)(m < 2 ? 0 : 0xff))
m++;
else if (*p)
m = 0;
else
m = 4 - m;
p++, n--;
}
/* restore */
z->total_in += p - z->next_in;
z->next_in = p;
z->avail_in = n;
z->state->sub.marker = m;
/* return no joy or set up to restart on a new block */
if (m != 4)
return Z_DATA_ERROR;
r = z->total_in; w = z->total_out;
inflateReset(z);
z->total_in = r; z->total_out = w;
z->state->mode = BLOCKS;
return Z_OK;
}
#undef NEEDBYTE
#undef NEXTBYTE
/*+++++*/
/* infutil.h -- types and macros common to blocks and codes
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
/* inflate blocks semi-private state */
struct inflate_blocks_state {
/* mode */
enum {
TYPE, /* get type bits (3, including end bit) */
LENS, /* get lengths for stored */
STORED, /* processing stored block */
TABLE, /* get table lengths */
BTREE, /* get bit lengths tree for a dynamic block */
DTREE, /* get length, distance trees for a dynamic block */
CODES, /* processing fixed or dynamic block */
DRY, /* output remaining window bytes */
DONEB, /* finished last block, done */
BADB} /* got a data error--stuck here */
mode; /* current inflate_block mode */
/* mode dependent information */
union {
uInt left; /* if STORED, bytes left to copy */
struct {
uInt table; /* table lengths (14 bits) */
uInt index; /* index into blens (or border) */
uIntf *blens; /* bit lengths of codes */
uInt bb; /* bit length tree depth */
inflate_huft *tb; /* bit length decoding tree */
int nblens; /* # elements allocated at blens */
} trees; /* if DTREE, decoding info for trees */
struct {
inflate_huft *tl, *td; /* trees to free */
inflate_codes_statef
*codes;
} decode; /* if CODES, current state */
} sub; /* submode */
uInt last; /* true if this block is the last block */
/* mode independent information */
uInt bitk; /* bits in bit buffer */
uLong bitb; /* bit buffer */
Bytef *window; /* sliding window */
Bytef *end; /* one byte after sliding window */
Bytef *read; /* window read pointer */
Bytef *write; /* window write pointer */
check_func checkfn; /* check function */
uLong check; /* check on output */
};
/* defines for inflate input/output */
/* update pointers and return */
#define UPDBITS {s->bitb=b;s->bitk=k;}
#define UPDIN {z->avail_in=n;z->total_in+=p-z->next_in;z->next_in=p;}
#define UPDOUT {s->write=q;}
#define UPDATE {UPDBITS UPDIN UPDOUT}
#define LEAVE {UPDATE return inflate_flush(s,z,r);}
/* get bytes and bits */
#define LOADIN {p=z->next_in;n=z->avail_in;b=s->bitb;k=s->bitk;}
#define NEEDBYTE {if(n)r=Z_OK;else LEAVE}
#define NEXTBYTE (n--,*p++)
#define NEEDBITS(j) {while(k<(j)){NEEDBYTE;b|=((uLong)NEXTBYTE)<<k;k+=8;}}
#define DUMPBITS(j) {b>>=(j);k-=(j);}
/* output bytes */
#define WAVAIL (q<s->read?s->read-q-1:s->end-q)
#define LOADOUT {q=s->write;m=WAVAIL;}
#define WRAP {if(q==s->end&&s->read!=s->window){q=s->window;m=WAVAIL;}}
#define FLUSH {UPDOUT r=inflate_flush(s,z,r); LOADOUT}
#define NEEDOUT {if(m==0){WRAP if(m==0){FLUSH WRAP if(m==0) LEAVE}}r=Z_OK;}
#define OUTBYTE(a) {*q++=(Byte)(a);m--;}
/* load local pointers */
#define LOAD {LOADIN LOADOUT}
/* And'ing with mask[n] masks the lower n bits */
local uInt inflate_mask[] = {
0x0000,
0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
};
/* copy as much as possible from the sliding window to the output area */
local int inflate_flush OF((
inflate_blocks_statef *,
z_stream *,
int));
/*+++++*/
/* inffast.h -- header to use inffast.c
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
local int inflate_fast OF((
uInt,
uInt,
inflate_huft *,
inflate_huft *,
inflate_blocks_statef *,
z_stream *));
/*+++++*/
/* infblock.c -- interpret and process block types to last block
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* Table for deflate from PKZIP's appnote.txt. */
local uInt 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};
/*
Notes beyond the 1.93a appnote.txt:
1. Distance pointers never point before the beginning of the output
stream.
2. Distance pointers can point back across blocks, up to 32k away.
3. There is an implied maximum of 7 bits for the bit length table and
15 bits for the actual data.
4. If only one code exists, then it is encoded using one bit. (Zero
would be more efficient, but perhaps a little confusing.) If two
codes exist, they are coded using one bit each (0 and 1).
5. There is no way of sending zero distance codes--a dummy must be
sent if there are none. (History: a pre 2.0 version of PKZIP would
store blocks with no distance codes, but this was discovered to be
too harsh a criterion.) Valid only for 1.93a. 2.04c does allow
zero distance codes, which is sent as one code of zero bits in
length.
6. There are up to 286 literal/length codes. Code 256 represents the
end-of-block. Note however that the static length tree defines
288 codes just to fill out the Huffman codes. Codes 286 and 287
cannot be used though, since there is no length base or extra bits
defined for them. Similarily, there are up to 30 distance codes.
However, static trees define 32 codes (all 5 bits) to fill out the
Huffman codes, but the last two had better not show up in the data.
7. Unzip can check dynamic Huffman blocks for complete code sets.
The exception is that a single code would not be complete (see #4).
8. The five bits following the block type is really the number of
literal codes sent minus 257.
9. Length codes 8,16,16 are interpreted as 13 length codes of 8 bits
(1+6+6). Therefore, to output three times the length, you output
three codes (1+1+1), whereas to output four times the same length,
you only need two codes (1+3). Hmm.
10. In the tree reconstruction algorithm, Code = Code + Increment
only if BitLength(i) is not zero. (Pretty obvious.)
11. Correction: 4 Bits: # of Bit Length codes - 4 (4 - 19)
12. Note: length code 284 can represent 227-258, but length code 285
really is 258. The last length deserves its own, short code
since it gets used a lot in very redundant files. The length
258 is special since 258 - 3 (the min match length) is 255.
13. The literal/length and distance code bit lengths are read as a
single stream of lengths. It is possible (and advantageous) for
a repeat code (16, 17, or 18) to go across the boundary between
the two sets of lengths.
*/
local void inflate_blocks_reset(
inflate_blocks_statef *s,
z_stream *z,
uLongf *c
)
{
if (s->checkfn != Z_NULL)
*c = s->check;
if (s->mode == BTREE || s->mode == DTREE)
ZFREE(z, s->sub.trees.blens, s->sub.trees.nblens * sizeof(uInt));
if (s->mode == CODES)
{
inflate_codes_free(s->sub.decode.codes, z);
inflate_trees_free(s->sub.decode.td, z);
inflate_trees_free(s->sub.decode.tl, z);
}
s->mode = TYPE;
s->bitk = 0;
s->bitb = 0;
s->read = s->write = s->window;
if (s->checkfn != Z_NULL)
s->check = (*s->checkfn)(0L, Z_NULL, 0);
Trace((stderr, "inflate: blocks reset\n"));
}
local inflate_blocks_statef *inflate_blocks_new(
z_stream *z,
check_func c,
uInt w
)
{
inflate_blocks_statef *s;
if ((s = (inflate_blocks_statef *)ZALLOC
(z,1,sizeof(struct inflate_blocks_state))) == Z_NULL)
return s;
if ((s->window = (Bytef *)ZALLOC(z, 1, w)) == Z_NULL)
{
ZFREE(z, s, sizeof(struct inflate_blocks_state));
return Z_NULL;
}
s->end = s->window + w;
s->checkfn = c;
s->mode = TYPE;
Trace((stderr, "inflate: blocks allocated\n"));
inflate_blocks_reset(s, z, &s->check);
return s;
}
local int inflate_blocks(
inflate_blocks_statef *s,
z_stream *z,
int r
)
{
uInt t; /* temporary storage */
uLong b; /* bit buffer */
uInt k; /* bits in bit buffer */
Bytef *p; /* input data pointer */
uInt n; /* bytes available there */
Bytef *q; /* output window write pointer */
uInt m; /* bytes to end of window or read pointer */
/* copy input/output information to locals (UPDATE macro restores) */
LOAD
/* process input based on current state */
while (1) switch (s->mode)
{
case TYPE:
NEEDBITS(3)
t = (uInt)b & 7;
s->last = t & 1;
switch (t >> 1)
{
case 0: /* stored */
Trace((stderr, "inflate: stored block%s\n",
s->last ? " (last)" : ""));
DUMPBITS(3)
t = k & 7; /* go to byte boundary */
DUMPBITS(t)
s->mode = LENS; /* get length of stored block */
break;
case 1: /* fixed */
Trace((stderr, "inflate: fixed codes block%s\n",
s->last ? " (last)" : ""));
{
uInt bl, bd;
inflate_huft *tl, *td;
inflate_trees_fixed(&bl, &bd, &tl, &td);
s->sub.decode.codes = inflate_codes_new(bl, bd, tl, td, z);
if (s->sub.decode.codes == Z_NULL)
{
r = Z_MEM_ERROR;
LEAVE
}
s->sub.decode.tl = Z_NULL; /* don't try to free these */
s->sub.decode.td = Z_NULL;
}
DUMPBITS(3)
s->mode = CODES;
break;
case 2: /* dynamic */
Trace((stderr, "inflate: dynamic codes block%s\n",
s->last ? " (last)" : ""));
DUMPBITS(3)
s->mode = TABLE;
break;
case 3: /* illegal */
DUMPBITS(3)
s->mode = BADB;
z->msg = "invalid block type";
r = Z_DATA_ERROR;
LEAVE
}
break;
case LENS:
NEEDBITS(32)
if (((~b) >> 16) != (b & 0xffff))
{
s->mode = BADB;
z->msg = "invalid stored block lengths";
r = Z_DATA_ERROR;
LEAVE
}
s->sub.left = (uInt)b & 0xffff;
b = k = 0; /* dump bits */
Tracev((stderr, "inflate: stored length %u\n", s->sub.left));
s->mode = s->sub.left ? STORED : TYPE;
break;
case STORED:
if (n == 0)
LEAVE
NEEDOUT
t = s->sub.left;
if (t > n) t = n;
if (t > m) t = m;
zmemcpy(q, p, t);
p += t; n -= t;
q += t; m -= t;
if ((s->sub.left -= t) != 0)
break;
Tracev((stderr, "inflate: stored end, %lu total out\n",
z->total_out + (q >= s->read ? q - s->read :
(s->end - s->read) + (q - s->window))));
s->mode = s->last ? DRY : TYPE;
break;
case TABLE:
NEEDBITS(14)
s->sub.trees.table = t = (uInt)b & 0x3fff;
#ifndef PKZIP_BUG_WORKAROUND
if ((t & 0x1f) > 29 || ((t >> 5) & 0x1f) > 29)
{
s->mode = BADB;
z->msg = "too many length or distance symbols";
r = Z_DATA_ERROR;
LEAVE
}
#endif
t = 258 + (t & 0x1f) + ((t >> 5) & 0x1f);
if (t < 19)
t = 19;
if ((s->sub.trees.blens = (uIntf*)ZALLOC(z, t, sizeof(uInt))) == Z_NULL)
{
r = Z_MEM_ERROR;
LEAVE
}
s->sub.trees.nblens = t;
DUMPBITS(14)
s->sub.trees.index = 0;
Tracev((stderr, "inflate: table sizes ok\n"));
s->mode = BTREE;
case BTREE:
while (s->sub.trees.index < 4 + (s->sub.trees.table >> 10))
{
NEEDBITS(3)
s->sub.trees.blens[border[s->sub.trees.index++]] = (uInt)b & 7;
DUMPBITS(3)
}
while (s->sub.trees.index < 19)
s->sub.trees.blens[border[s->sub.trees.index++]] = 0;
s->sub.trees.bb = 7;
t = inflate_trees_bits(s->sub.trees.blens, &s->sub.trees.bb,
&s->sub.trees.tb, z);
if (t != Z_OK)
{
r = t;
if (r == Z_DATA_ERROR)
s->mode = BADB;
LEAVE
}
s->sub.trees.index = 0;
Tracev((stderr, "inflate: bits tree ok\n"));
s->mode = DTREE;
case DTREE:
while (t = s->sub.trees.table,
s->sub.trees.index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))
{
inflate_huft *h;
uInt i, j, c;
t = s->sub.trees.bb;
NEEDBITS(t)
h = s->sub.trees.tb + ((uInt)b & inflate_mask[t]);
t = h->word.what.Bits;
c = h->more.Base;
if (c < 16)
{
DUMPBITS(t)
s->sub.trees.blens[s->sub.trees.index++] = c;
}
else /* c == 16..18 */
{
i = c == 18 ? 7 : c - 14;
j = c == 18 ? 11 : 3;
NEEDBITS(t + i)
DUMPBITS(t)
j += (uInt)b & inflate_mask[i];
DUMPBITS(i)
i = s->sub.trees.index;
t = s->sub.trees.table;
if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) ||
(c == 16 && i < 1))
{
s->mode = BADB;
z->msg = "invalid bit length repeat";
r = Z_DATA_ERROR;
LEAVE
}
c = c == 16 ? s->sub.trees.blens[i - 1] : 0;
do {
s->sub.trees.blens[i++] = c;
} while (--j);
s->sub.trees.index = i;
}
}
inflate_trees_free(s->sub.trees.tb, z);
s->sub.trees.tb = Z_NULL;
{
uInt bl, bd;
inflate_huft *tl, *td;
inflate_codes_statef *c;
bl = 9; /* must be <= 9 for lookahead assumptions */
bd = 6; /* must be <= 9 for lookahead assumptions */
t = s->sub.trees.table;
t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
s->sub.trees.blens, &bl, &bd, &tl, &td, z);
if (t != Z_OK)
{
if (t == (uInt)Z_DATA_ERROR)
s->mode = BADB;
r = t;
LEAVE
}
Tracev((stderr, "inflate: trees ok\n"));
if ((c = inflate_codes_new(bl, bd, tl, td, z)) == Z_NULL)
{
inflate_trees_free(td, z);
inflate_trees_free(tl, z);
r = Z_MEM_ERROR;
LEAVE
}
ZFREE(z, s->sub.trees.blens, s->sub.trees.nblens * sizeof(uInt));
s->sub.decode.codes = c;
s->sub.decode.tl = tl;
s->sub.decode.td = td;
}
s->mode = CODES;
case CODES:
UPDATE
if ((r = inflate_codes(s, z, r)) != Z_STREAM_END)
return inflate_flush(s, z, r);
r = Z_OK;
inflate_codes_free(s->sub.decode.codes, z);
inflate_trees_free(s->sub.decode.td, z);
inflate_trees_free(s->sub.decode.tl, z);
LOAD
Tracev((stderr, "inflate: codes end, %lu total out\n",
z->total_out + (q >= s->read ? q - s->read :
(s->end - s->read) + (q - s->window))));
if (!s->last)
{
s->mode = TYPE;
break;
}
if (k > 7) /* return unused byte, if any */
{
Assert(k < 16, "inflate_codes grabbed too many bytes")
k -= 8;
n++;
p--; /* can always return one */
}
s->mode = DRY;
case DRY:
FLUSH
if (s->read != s->write)
LEAVE
s->mode = DONEB;
case DONEB:
r = Z_STREAM_END;
LEAVE
case BADB:
r = Z_DATA_ERROR;
LEAVE
default:
r = Z_STREAM_ERROR;
LEAVE
}
}
local int inflate_blocks_free(
inflate_blocks_statef *s,
z_stream *z,
uLongf *c
)
{
inflate_blocks_reset(s, z, c);
ZFREE(z, s->window, s->end - s->window);
ZFREE(z, s, sizeof(struct inflate_blocks_state));
Trace((stderr, "inflate: blocks freed\n"));
return Z_OK;
}
/*
* This subroutine adds the data at next_in/avail_in to the output history
* without performing any output. The output buffer must be "caught up";
* i.e. no pending output (hence s->read equals s->write), and the state must
* be BLOCKS (i.e. we should be willing to see the start of a series of
* BLOCKS). On exit, the output will also be caught up, and the checksum
* will have been updated if need be.
*/
local int inflate_addhistory(
inflate_blocks_statef *s,
z_stream *z
)
{
uLong b; /* bit buffer */ /* NOT USED HERE */
uInt k; /* bits in bit buffer */ /* NOT USED HERE */
uInt t; /* temporary storage */
Bytef *p; /* input data pointer */
uInt n; /* bytes available there */
Bytef *q; /* output window write pointer */
uInt m; /* bytes to end of window or read pointer */
if (s->read != s->write)
return Z_STREAM_ERROR;
if (s->mode != TYPE)
return Z_DATA_ERROR;
/* we're ready to rock */
LOAD
/* while there is input ready, copy to output buffer, moving
* pointers as needed.
*/
while (n) {
t = n; /* how many to do */
/* is there room until end of buffer? */
if (t > m) t = m;
/* update check information */
if (s->checkfn != Z_NULL)
s->check = (*s->checkfn)(s->check, q, t);
zmemcpy(q, p, t);
q += t;
p += t;
n -= t;
z->total_out += t;
s->read = q; /* drag read pointer forward */
/* WRAP */ /* expand WRAP macro by hand to handle s->read */
if (q == s->end) {
s->read = q = s->window;
m = WAVAIL;
}
}
UPDATE
return Z_OK;
}
/*
* At the end of a Deflate-compressed PPP packet, we expect to have seen
* a `stored' block type value but not the (zero) length bytes.
*/
local int inflate_packet_flush(
inflate_blocks_statef *s
)
{
if (s->mode != LENS)
return Z_DATA_ERROR;
s->mode = TYPE;
return Z_OK;
}
/*+++++*/
/* inftrees.c -- generate Huffman trees for efficient decoding
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* simplify the use of the inflate_huft type with some defines */
#define base more.Base
#define next more.Next
#define exop word.what.Exop
#define bits word.what.Bits
local int huft_build OF((
uIntf *, /* code lengths in bits */
uInt, /* number of codes */
uInt, /* number of "simple" codes */
uIntf *, /* list of base values for non-simple codes */
uIntf *, /* list of extra bits for non-simple codes */
inflate_huft * FAR*,/* result: starting table */
uIntf *, /* maximum lookup bits (returns actual) */
z_stream *)); /* for zalloc function */
local voidpf falloc OF((
voidpf, /* opaque pointer (not used) */
uInt, /* number of items */
uInt)); /* size of item */
local void ffree OF((
voidpf q, /* opaque pointer (not used) */
voidpf p, /* what to free (not used) */
uInt n)); /* number of bytes (not used) */
/* Tables for deflate from PKZIP's appnote.txt. */
local uInt 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};
/* actually lengths - 2; also see note #13 above about 258 */
local uInt 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, 192, 192}; /* 192==invalid */
local uInt 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};
local uInt 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};
/*
Huffman code decoding is performed using a multi-level table lookup.
The fastest way to decode is to simply build a lookup table whose
size is determined by the longest code. However, the time it takes
to build this table can also be a factor if the data being decoded
is not very long. The most common codes are necessarily the
shortest codes, so those codes dominate the decoding time, and hence
the speed. The idea is you can have a shorter table that decodes the
shorter, more probable codes, and then point to subsidiary tables for
the longer codes. The time it costs to decode the longer codes is
then traded against the time it takes to make longer tables.
This results of this trade are in the variables lbits and dbits
below. lbits is the number of bits the first level table for literal/
length codes can decode in one step, and dbits is the same thing for
the distance codes. Subsequent tables are also less than or equal to
those sizes. These values may be adjusted either when all of the
codes are shorter than that, in which case the longest code length in
bits is used, or when the shortest code is *longer* than the requested
table size, in which case the length of the shortest code in bits is
used.
There are two different values for the two tables, since they code a
different number of possibilities each. The literal/length table
codes 286 possible values, or in a flat code, a little over eight
bits. The distance table codes 30 possible values, or a little less
than five bits, flat. The optimum values for speed end up being
about one bit more than those, so lbits is 8+1 and dbits is 5+1.
The optimum values may differ though from machine to machine, and
possibly even between compilers. Your mileage may vary.
*/
/* If BMAX needs to be larger than 16, then h and x[] should be uLong. */
#define BMAX 15 /* maximum bit length of any code */
#define N_MAX 288 /* maximum number of codes in any set */
#ifdef DEBUG_ZLIB
uInt inflate_hufts;
#endif
local int huft_build(
uIntf *b, /* code lengths in bits (all assumed <= BMAX) */
uInt n, /* number of codes (assumed <= N_MAX) */
uInt s, /* number of simple-valued codes (0..s-1) */
uIntf *d, /* list of base values for non-simple codes */
uIntf *e, /* list of extra bits for non-simple codes */
inflate_huft * FAR *t, /* result: starting table */
uIntf *m, /* maximum lookup bits, returns actual */
z_stream *zs /* for zalloc function */
)
/* Given a list of code lengths and a maximum table size, make a set of
tables to decode that set of codes. Return Z_OK on success, Z_BUF_ERROR
if the given code set is incomplete (the tables are still built in this
case), Z_DATA_ERROR if the input is invalid (all zero length codes or an
over-subscribed set of lengths), or Z_MEM_ERROR if not enough memory. */
{
uInt a; /* counter for codes of length k */
uInt c[BMAX+1]; /* bit length count table */
uInt f; /* i repeats in table every f entries */
int g; /* maximum code length */
int h; /* table level */
register uInt i; /* counter, current code */
register uInt j; /* counter */
register int k; /* number of bits in current code */
int l; /* bits per table (returned in m) */
register uIntf *p; /* pointer into c[], b[], or v[] */
inflate_huft *q; /* points to current table */
struct inflate_huft_s r; /* table entry for structure assignment */
inflate_huft *u[BMAX]; /* table stack */
uInt v[N_MAX]; /* values in order of bit length */
register int w; /* bits before this table == (l * h) */
uInt x[BMAX+1]; /* bit offsets, then code stack */
uIntf *xp; /* pointer into x */
int y; /* number of dummy codes added */
uInt z; /* number of entries in current table */
/* Generate counts for each bit length */
p = c;
#define C0 *p++ = 0;
#define C2 C0 C0 C0 C0
#define C4 C2 C2 C2 C2
C4 /* clear c[]--assume BMAX+1 is 16 */
p = b; i = n;
do {
c[*p++]++; /* assume all entries <= BMAX */
} while (--i);
if (c[0] == n) /* null input--all zero length codes */
{
*t = (inflate_huft *)Z_NULL;
*m = 0;
return Z_DATA_ERROR;
}
/* Find minimum and maximum length, bound *m by those */
l = *m;
for (j = 1; j <= BMAX; j++)
if (c[j])
break;
k = j; /* minimum code length */
if ((uInt)l < j)
l = j;
for (i = BMAX; i; i--)
if (c[i])
break;
g = i; /* maximum code length */
if ((uInt)l > i)
l = i;
*m = l;
/* Adjust last length count to fill out codes, if needed */
for (y = 1 << j; j < i; j++, y <<= 1)
if ((y -= c[j]) < 0)
return Z_DATA_ERROR;
if ((y -= c[i]) < 0)
return Z_DATA_ERROR;
c[i] += y;
/* Generate starting offsets into the value table for each length */
x[1] = j = 0;
p = c + 1; xp = x + 2;
while (--i) { /* note that i == g from above */
*xp++ = (j += *p++);
}
/* Make a table of values in order of bit lengths */
p = b; i = 0;
do {
if ((j = *p++) != 0)
v[x[j]++] = i;
} while (++i < n);
n = x[g]; /* set n to length of v */
/* Generate the Huffman codes and for each, make the table entries */
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) */
u[0] = (inflate_huft *)Z_NULL; /* just to keep compilers happy */
q = (inflate_huft *)Z_NULL; /* ditto */
z = 0; /* ditto */
/* go through the bit lengths (k already is bits in shortest code) */
for (; k <= g; k++)
{
a = c[k];
while (a--)
{
/* here i is the Huffman code of length k bits for value *p */
/* make tables up to required level */
while (k > w + l)
{
h++;
w += l; /* previous table always l bits */
/* compute minimum size table less than or equal to l bits */
z = (z = g - w) > (uInt)l ? l : z; /* table size upper limit */
if ((f = 1 << (j = k - w)) > a + 1) /* try a k-w bit table */
{ /* too few codes for k-w bit table */
f -= a + 1; /* deduct codes from patterns left */
xp = c + k;
if (j < z)
while (++j < z) /* try smaller tables up to z bits */
{
if ((f <<= 1) <= *++xp)
break; /* enough codes to use up j bits */
f -= *xp; /* else deduct codes from patterns */
}
}
z = 1 << j; /* table entries for j-bit table */
/* allocate and link in new table */
if ((q = (inflate_huft *)ZALLOC
(zs,z + 1,sizeof(inflate_huft))) == Z_NULL)
{
if (h)
inflate_trees_free(u[0], zs);
return Z_MEM_ERROR; /* not enough memory */
}
q->word.Nalloc = z + 1;
#ifdef DEBUG_ZLIB
inflate_hufts += z + 1;
#endif
*t = q + 1; /* link to list for huft_free() */
*(t = &(q->next)) = Z_NULL;
u[h] = ++q; /* table starts after link */
/* connect to last table, if there is one */
if (h)
{
x[h] = i; /* save pattern for backing up */
r.bits = (Byte)l; /* bits to dump before this table */
r.exop = (Byte)j; /* bits in this table */
r.next = q; /* pointer to this table */
j = i >> (w - l); /* (get around Turbo C bug) */
u[h-1][j] = r; /* connect to last table */
}
}
/* set up table entry in r */
r.bits = (Byte)(k - w);
if (p >= v + n)
r.exop = 128 + 64; /* out of values--invalid code */
else if (*p < s)
{
r.exop = (Byte)(*p < 256 ? 0 : 32 + 64); /* 256 is end-of-block */
r.base = *p++; /* simple code is just the value */
}
else
{
r.exop = (Byte)e[*p - s] + 16 + 64; /* non-simple--look up in lists */
r.base = d[*p++ - s];
}
/* fill code-like entries with r */
f = 1 << (k - w);
for (j = i >> w; j < z; j += f)
q[j] = r;
/* backwards increment the k-bit code i */
for (j = 1 << (k - 1); i & j; j >>= 1)
i ^= j;
i ^= j;
/* backup over finished tables */
while ((i & ((1 << w) - 1)) != x[h])
{
h--; /* don't need to update q */
w -= l;
}
}
}
/* Return Z_BUF_ERROR if we were given an incomplete table */
return y != 0 && g != 1 ? Z_BUF_ERROR : Z_OK;
}
local int inflate_trees_bits(
uIntf *c, /* 19 code lengths */
uIntf *bb, /* bits tree desired/actual depth */
inflate_huft * FAR *tb, /* bits tree result */
z_stream *z /* for zfree function */
)
{
int r;
r = huft_build(c, 19, 19, (uIntf*)Z_NULL, (uIntf*)Z_NULL, tb, bb, z);
if (r == Z_DATA_ERROR)
z->msg = "oversubscribed dynamic bit lengths tree";
else if (r == Z_BUF_ERROR)
{
inflate_trees_free(*tb, z);
z->msg = "incomplete dynamic bit lengths tree";
r = Z_DATA_ERROR;
}
return r;
}
local int inflate_trees_dynamic(
uInt nl, /* number of literal/length codes */
uInt nd, /* number of distance codes */
uIntf *c, /* that many (total) code lengths */
uIntf *bl, /* literal desired/actual bit depth */
uIntf *bd, /* distance desired/actual bit depth */
inflate_huft * FAR *tl, /* literal/length tree result */
inflate_huft * FAR *td, /* distance tree result */
z_stream *z /* for zfree function */
)
{
int r;
/* build literal/length tree */
if ((r = huft_build(c, nl, 257, cplens, cplext, tl, bl, z)) != Z_OK)
{
if (r == Z_DATA_ERROR)
z->msg = "oversubscribed literal/length tree";
else if (r == Z_BUF_ERROR)
{
inflate_trees_free(*tl, z);
z->msg = "incomplete literal/length tree";
r = Z_DATA_ERROR;
}
return r;
}
/* build distance tree */
if ((r = huft_build(c + nl, nd, 0, cpdist, cpdext, td, bd, z)) != Z_OK)
{
if (r == Z_DATA_ERROR)
z->msg = "oversubscribed literal/length tree";
else if (r == Z_BUF_ERROR) {
#ifdef PKZIP_BUG_WORKAROUND
r = Z_OK;
}
#else
inflate_trees_free(*td, z);
z->msg = "incomplete literal/length tree";
r = Z_DATA_ERROR;
}
inflate_trees_free(*tl, z);
return r;
#endif
}
/* done */
return Z_OK;
}
/* build fixed tables only once--keep them here */
local int fixed_lock = 0;
local int fixed_built = 0;
#define FIXEDH 530 /* number of hufts used by fixed tables */
local uInt fixed_left = FIXEDH;
local inflate_huft fixed_mem[FIXEDH];
local uInt fixed_bl;
local uInt fixed_bd;
local inflate_huft *fixed_tl;
local inflate_huft *fixed_td;
local voidpf falloc(
voidpf q, /* opaque pointer (not used) */
uInt n, /* number of items */
uInt s /* size of item */
)
{
Assert(s == sizeof(inflate_huft) && n <= fixed_left,
"inflate_trees falloc overflow");
if (q) s++; /* to make some compilers happy */
fixed_left -= n;
return (voidpf)(fixed_mem + fixed_left);
}
local void ffree(
voidpf q,
voidpf p,
uInt n
)
{
Assert(0, "inflate_trees ffree called!");
if (q) q = p; /* to make some compilers happy */
}
local int inflate_trees_fixed(
uIntf *bl, /* literal desired/actual bit depth */
uIntf *bd, /* distance desired/actual bit depth */
inflate_huft * FAR *tl, /* literal/length tree result */
inflate_huft * FAR *td /* distance tree result */
)
{
/* build fixed tables if not built already--lock out other instances */
while (++fixed_lock > 1)
fixed_lock--;
if (!fixed_built)
{
int k; /* temporary variable */
unsigned c[288]; /* length list for huft_build */
z_stream z; /* for falloc function */
/* set up fake z_stream for memory routines */
z.zalloc = falloc;
z.zfree = ffree;
z.opaque = Z_NULL;
/* literal table */
for (k = 0; k < 144; k++)
c[k] = 8;
for (; k < 256; k++)
c[k] = 9;
for (; k < 280; k++)
c[k] = 7;
for (; k < 288; k++)
c[k] = 8;
fixed_bl = 7;
huft_build(c, 288, 257, cplens, cplext, &fixed_tl, &fixed_bl, &z);
/* distance table */
for (k = 0; k < 30; k++)
c[k] = 5;
fixed_bd = 5;
huft_build(c, 30, 0, cpdist, cpdext, &fixed_td, &fixed_bd, &z);
/* done */
fixed_built = 1;
}
fixed_lock--;
*bl = fixed_bl;
*bd = fixed_bd;
*tl = fixed_tl;
*td = fixed_td;
return Z_OK;
}
local int inflate_trees_free(
inflate_huft *t, /* table to free */
z_stream *z /* for zfree function */
)
/* Free the malloc'ed tables built by huft_build(), which makes a linked
list of the tables it made, with the links in a dummy first entry of
each table. */
{
register inflate_huft *p, *q;
/* Go through linked list, freeing from the malloced (t[-1]) address. */
p = t;
while (p != Z_NULL)
{
q = (--p)->next;
ZFREE(z, p, p->word.Nalloc * sizeof(inflate_huft));
p = q;
}
return Z_OK;
}
/*+++++*/
/* infcodes.c -- process literals and length/distance pairs
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* simplify the use of the inflate_huft type with some defines */
#define base more.Base
#define next more.Next
#define exop word.what.Exop
#define bits word.what.Bits
/* inflate codes private state */
struct inflate_codes_state {
/* mode */
enum { /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
START, /* x: set up for LEN */
LEN, /* i: get length/literal/eob next */
LENEXT, /* i: getting length extra (have base) */
DIST, /* i: get distance next */
DISTEXT, /* i: getting distance extra */
COPY, /* o: copying bytes in window, waiting for space */
LIT, /* o: got literal, waiting for output space */
WASH, /* o: got eob, possibly still output waiting */
END, /* x: got eob and all data flushed */
BADCODE} /* x: got error */
mode; /* current inflate_codes mode */
/* mode dependent information */
uInt len;
union {
struct {
inflate_huft *tree; /* pointer into tree */
uInt need; /* bits needed */
} code; /* if LEN or DIST, where in tree */
uInt lit; /* if LIT, literal */
struct {
uInt get; /* bits to get for extra */
uInt dist; /* distance back to copy from */
} copy; /* if EXT or COPY, where and how much */
} sub; /* submode */
/* mode independent information */
Byte lbits; /* ltree bits decoded per branch */
Byte dbits; /* dtree bits decoder per branch */
inflate_huft *ltree; /* literal/length/eob tree */
inflate_huft *dtree; /* distance tree */
};
local inflate_codes_statef *inflate_codes_new(
uInt bl,
uInt bd,
inflate_huft *tl,
inflate_huft *td,
z_stream *z
)
{
inflate_codes_statef *c;
if ((c = (inflate_codes_statef *)
ZALLOC(z,1,sizeof(struct inflate_codes_state))) != Z_NULL)
{
c->mode = START;
c->lbits = (Byte)bl;
c->dbits = (Byte)bd;
c->ltree = tl;
c->dtree = td;
Tracev((stderr, "inflate: codes new\n"));
}
return c;
}
local int inflate_codes(
inflate_blocks_statef *s,
z_stream *z,
int r
)
{
uInt j; /* temporary storage */
inflate_huft *t; /* temporary pointer */
uInt e; /* extra bits or operation */
uLong b; /* bit buffer */
uInt k; /* bits in bit buffer */
Bytef *p; /* input data pointer */
uInt n; /* bytes available there */
Bytef *q; /* output window write pointer */
uInt m; /* bytes to end of window or read pointer */
Bytef *f; /* pointer to copy strings from */
inflate_codes_statef *c = s->sub.decode.codes; /* codes state */
/* copy input/output information to locals (UPDATE macro restores) */
LOAD
/* process input and output based on current state */
while (1) switch (c->mode)
{ /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
case START: /* x: set up for LEN */
#ifndef SLOW
if (m >= 258 && n >= 10)
{
UPDATE
r = inflate_fast(c->lbits, c->dbits, c->ltree, c->dtree, s, z);
LOAD
if (r != Z_OK)
{
c->mode = r == Z_STREAM_END ? WASH : BADCODE;
break;
}
}
#endif /* !SLOW */
c->sub.code.need = c->lbits;
c->sub.code.tree = c->ltree;
c->mode = LEN;
case LEN: /* i: get length/literal/eob next */
j = c->sub.code.need;
NEEDBITS(j)
t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
DUMPBITS(t->bits)
e = (uInt)(t->exop);
if (e == 0) /* literal */
{
c->sub.lit = t->base;
Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
"inflate: literal '%c'\n" :
"inflate: literal 0x%02x\n", t->base));
c->mode = LIT;
break;
}
if (e & 16) /* length */
{
c->sub.copy.get = e & 15;
c->len = t->base;
c->mode = LENEXT;
break;
}
if ((e & 64) == 0) /* next table */
{
c->sub.code.need = e;
c->sub.code.tree = t->next;
break;
}
if (e & 32) /* end of block */
{
Tracevv((stderr, "inflate: end of block\n"));
c->mode = WASH;
break;
}
c->mode = BADCODE; /* invalid code */
z->msg = "invalid literal/length code";
r = Z_DATA_ERROR;
LEAVE
case LENEXT: /* i: getting length extra (have base) */
j = c->sub.copy.get;
NEEDBITS(j)
c->len += (uInt)b & inflate_mask[j];
DUMPBITS(j)
c->sub.code.need = c->dbits;
c->sub.code.tree = c->dtree;
Tracevv((stderr, "inflate: length %u\n", c->len));
c->mode = DIST;
case DIST: /* i: get distance next */
j = c->sub.code.need;
NEEDBITS(j)
t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
DUMPBITS(t->bits)
e = (uInt)(t->exop);
if (e & 16) /* distance */
{
c->sub.copy.get = e & 15;
c->sub.copy.dist = t->base;
c->mode = DISTEXT;
break;
}
if ((e & 64) == 0) /* next table */
{
c->sub.code.need = e;
c->sub.code.tree = t->next;
break;
}
c->mode = BADCODE; /* invalid code */
z->msg = "invalid distance code";
r = Z_DATA_ERROR;
LEAVE
case DISTEXT: /* i: getting distance extra */
j = c->sub.copy.get;
NEEDBITS(j)
c->sub.copy.dist += (uInt)b & inflate_mask[j];
DUMPBITS(j)
Tracevv((stderr, "inflate: distance %u\n", c->sub.copy.dist));
c->mode = COPY;
case COPY: /* o: copying bytes in window, waiting for space */
#ifndef __TURBOC__ /* Turbo C bug for following expression */
f = (uInt)(q - s->window) < c->sub.copy.dist ?
s->end - (c->sub.copy.dist - (q - s->window)) :
q - c->sub.copy.dist;
#else
f = q - c->sub.copy.dist;
if ((uInt)(q - s->window) < c->sub.copy.dist)
f = s->end - (c->sub.copy.dist - (q - s->window));
#endif
while (c->len)
{
NEEDOUT
OUTBYTE(*f++)
if (f == s->end)
f = s->window;
c->len--;
}
c->mode = START;
break;
case LIT: /* o: got literal, waiting for output space */
NEEDOUT
OUTBYTE(c->sub.lit)
c->mode = START;
break;
case WASH: /* o: got eob, possibly more output */
FLUSH
if (s->read != s->write)
LEAVE
c->mode = END;
case END:
r = Z_STREAM_END;
LEAVE
case BADCODE: /* x: got error */
r = Z_DATA_ERROR;
LEAVE
default:
r = Z_STREAM_ERROR;
LEAVE
}
}
local void inflate_codes_free(
inflate_codes_statef *c,
z_stream *z
)
{
ZFREE(z, c, sizeof(struct inflate_codes_state));
Tracev((stderr, "inflate: codes free\n"));
}
/*+++++*/
/* inflate_util.c -- data and routines common to blocks and codes
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* copy as much as possible from the sliding window to the output area */
local int inflate_flush(
inflate_blocks_statef *s,
z_stream *z,
int r
)
{
uInt n;
Bytef *p, *q;
/* local copies of source and destination pointers */
p = z->next_out;
q = s->read;
/* compute number of bytes to copy as far as end of window */
n = (uInt)((q <= s->write ? s->write : s->end) - q);
if (n > z->avail_out) n = z->avail_out;
if (n && r == Z_BUF_ERROR) r = Z_OK;
/* update counters */
z->avail_out -= n;
z->total_out += n;
/* update check information */
if (s->checkfn != Z_NULL)
s->check = (*s->checkfn)(s->check, q, n);
/* copy as far as end of window */
zmemcpy(p, q, n);
p += n;
q += n;
/* see if more to copy at beginning of window */
if (q == s->end)
{
/* wrap pointers */
q = s->window;
if (s->write == s->end)
s->write = s->window;
/* compute bytes to copy */
n = (uInt)(s->write - q);
if (n > z->avail_out) n = z->avail_out;
if (n && r == Z_BUF_ERROR) r = Z_OK;
/* update counters */
z->avail_out -= n;
z->total_out += n;
/* update check information */
if (s->checkfn != Z_NULL)
s->check = (*s->checkfn)(s->check, q, n);
/* copy */
zmemcpy(p, q, n);
p += n;
q += n;
}
/* update pointers */
z->next_out = p;
s->read = q;
/* done */
return r;
}
/*+++++*/
/* inffast.c -- process literals and length/distance pairs fast
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* simplify the use of the inflate_huft type with some defines */
#define base more.Base
#define next more.Next
#define exop word.what.Exop
#define bits word.what.Bits
/* macros for bit input with no checking and for returning unused bytes */
#define GRABBITS(j) {while(k<(j)){b|=((uLong)NEXTBYTE)<<k;k+=8;}}
#define UNGRAB {n+=(c=k>>3);p-=c;k&=7;}
/* Called with number of bytes left to write in window at least 258
(the maximum string length) and number of input bytes available
at least ten. The ten bytes are six bytes for the longest length/
distance pair plus four bytes for overloading the bit buffer. */
local int inflate_fast(
uInt bl,
uInt bd,
inflate_huft *tl,
inflate_huft *td,
inflate_blocks_statef *s,
z_stream *z
)
{
inflate_huft *t; /* temporary pointer */
uInt e; /* extra bits or operation */
uLong b; /* bit buffer */
uInt k; /* bits in bit buffer */
Bytef *p; /* input data pointer */
uInt n; /* bytes available there */
Bytef *q; /* output window write pointer */
uInt m; /* bytes to end of window or read pointer */
uInt ml; /* mask for literal/length tree */
uInt md; /* mask for distance tree */
uInt c; /* bytes to copy */
uInt d; /* distance back to copy from */
Bytef *r; /* copy source pointer */
/* load input, output, bit values */
LOAD
/* initialize masks */
ml = inflate_mask[bl];
md = inflate_mask[bd];
/* do until not enough input or output space for fast loop */
do { /* assume called with m >= 258 && n >= 10 */
/* get literal/length code */
GRABBITS(20) /* max bits for literal/length code */
if ((e = (t = tl + ((uInt)b & ml))->exop) == 0)
{
DUMPBITS(t->bits)
Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
"inflate: * literal '%c'\n" :
"inflate: * literal 0x%02x\n", t->base));
*q++ = (Byte)t->base;
m--;
continue;
}
do {
DUMPBITS(t->bits)
if (e & 16)
{
/* get extra bits for length */
e &= 15;
c = t->base + ((uInt)b & inflate_mask[e]);
DUMPBITS(e)
Tracevv((stderr, "inflate: * length %u\n", c));
/* decode distance base of block to copy */
GRABBITS(15); /* max bits for distance code */
e = (t = td + ((uInt)b & md))->exop;
do {
DUMPBITS(t->bits)
if (e & 16)
{
/* get extra bits to add to distance base */
e &= 15;
GRABBITS(e) /* get extra bits (up to 13) */
d = t->base + ((uInt)b & inflate_mask[e]);
DUMPBITS(e)
Tracevv((stderr, "inflate: * distance %u\n", d));
/* do the copy */
m -= c;
if ((uInt)(q - s->window) >= d) /* offset before dest */
{ /* just copy */
r = q - d;
*q++ = *r++; c--; /* minimum count is three, */
*q++ = *r++; c--; /* so unroll loop a little */
}
else /* else offset after destination */
{
e = d - (q - s->window); /* bytes from offset to end */
r = s->end - e; /* pointer to offset */
if (c > e) /* if source crosses, */
{
c -= e; /* copy to end of window */
do {
*q++ = *r++;
} while (--e);
r = s->window; /* copy rest from start of window */
}
}
do { /* copy all or what's left */
*q++ = *r++;
} while (--c);
break;
}
else if ((e & 64) == 0)
e = (t = t->next + ((uInt)b & inflate_mask[e]))->exop;
else
{
z->msg = "invalid distance code";
UNGRAB
UPDATE
return Z_DATA_ERROR;
}
} while (1);
break;
}
if ((e & 64) == 0)
{
if ((e = (t = t->next + ((uInt)b & inflate_mask[e]))->exop) == 0)
{
DUMPBITS(t->bits)
Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
"inflate: * literal '%c'\n" :
"inflate: * literal 0x%02x\n", t->base));
*q++ = (Byte)t->base;
m--;
break;
}
}
else if (e & 32)
{
Tracevv((stderr, "inflate: * end of block\n"));
UNGRAB
UPDATE
return Z_STREAM_END;
}
else
{
z->msg = "invalid literal/length code";
UNGRAB
UPDATE
return Z_DATA_ERROR;
}
} while (1);
} while (m >= 258 && n >= 10);
/* not enough input or output--restore pointers and return */
UNGRAB
UPDATE
return Z_OK;
}
/*+++++*/
/* zutil.c -- target dependent utility functions for the compression library
* Copyright (C) 1995 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* From: zutil.c,v 1.8 1995/05/03 17:27:12 jloup Exp */
char *zlib_version = ZLIB_VERSION;
char *z_errmsg[] = {
"stream end", /* Z_STREAM_END 1 */
"", /* Z_OK 0 */
"file error", /* Z_ERRNO (-1) */
"stream error", /* Z_STREAM_ERROR (-2) */
"data error", /* Z_DATA_ERROR (-3) */
"insufficient memory", /* Z_MEM_ERROR (-4) */
"buffer error", /* Z_BUF_ERROR (-5) */
""};
/*+++++*/
/* adler32.c -- compute the Adler-32 checksum of a data stream
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* From: adler32.c,v 1.6 1995/05/03 17:27:08 jloup Exp */
#define BASE 65521L /* largest prime smaller than 65536 */
#define NMAX 5552
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
#define DO1(buf) {s1 += *buf++; s2 += s1;}
#define DO2(buf) DO1(buf); DO1(buf);
#define DO4(buf) DO2(buf); DO2(buf);
#define DO8(buf) DO4(buf); DO4(buf);
#define DO16(buf) DO8(buf); DO8(buf);
/* ========================================================================= */
uLong adler32(
uLong adler,
Bytef *buf,
uInt len
)
{
unsigned long s1 = adler & 0xffff;
unsigned long s2 = (adler >> 16) & 0xffff;
int k;
if (buf == Z_NULL) return 1L;
while (len > 0) {
k = len < NMAX ? len : NMAX;
len -= k;
while (k >= 16) {
DO16(buf);
k -= 16;
}
if (k != 0) do {
DO1(buf);
} while (--k);
s1 %= BASE;
s2 %= BASE;
}
return (s2 << 16) | s1;
}
arch/ppc64/boot/zlib.h deleted 100644 → 0
View file @ 8afe31c9
/* */
/*
* This file is derived from zlib.h and zconf.h from the zlib-0.95
* distribution by Jean-loup Gailly and Mark Adler, with some additions
* by Paul Mackerras to aid in implementing Deflate compression and
* decompression for PPP packets.
*/
/*
* ==FILEVERSION 960122==
*
* This marker is used by the Linux installation script to determine
* whether an up-to-date version of this file is already installed.
*/
/* zlib.h -- interface of the 'zlib' general purpose compression library
version 0.95, Aug 16th, 1995.
Copyright (C) 1995 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Jean-loup Gailly Mark Adler
gzip@prep.ai.mit.edu madler@alumni.caltech.edu
*/
#ifndef _ZLIB_H
#define _ZLIB_H
/* #include "zconf.h" */ /* included directly here */
/* zconf.h -- configuration of the zlib compression library
* Copyright (C) 1995 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* From: zconf.h,v 1.12 1995/05/03 17:27:12 jloup Exp */
/*
The library does not install any signal handler. It is recommended to
add at least a handler for SIGSEGV when decompressing; the library checks
the consistency of the input data whenever possible but may go nuts
for some forms of corrupted input.
*/
/*
* Compile with -DMAXSEG_64K if the alloc function cannot allocate more
* than 64k bytes at a time (needed on systems with 16-bit int).
* Compile with -DUNALIGNED_OK if it is OK to access shorts or ints
* at addresses which are not a multiple of their size.
* Under DOS, -DFAR=far or -DFAR=__far may be needed.
*/
#ifndef STDC
# if defined(MSDOS) || defined(__STDC__) || defined(__cplusplus)
# define STDC
# endif
#endif
#ifdef __MWERKS__ /* Metrowerks CodeWarrior declares fileno() in unix.h */
# include <unix.h>
#endif
/* Maximum value for memLevel in deflateInit2 */
#ifndef MAX_MEM_LEVEL
# ifdef MAXSEG_64K
# define MAX_MEM_LEVEL 8
# else
# define MAX_MEM_LEVEL 9
# endif
#endif
#ifndef FAR
# define FAR
#endif
/* Maximum value for windowBits in deflateInit2 and inflateInit2 */
#ifndef MAX_WBITS
# define MAX_WBITS 15 /* 32K LZ77 window */
#endif
/* The memory requirements for deflate are (in bytes):
1 << (windowBits+2) + 1 << (memLevel+9)
that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
plus a few kilobytes for small objects. For example, if you want to reduce
the default memory requirements from 256K to 128K, compile with
make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
Of course this will generally degrade compression (there's no free lunch).
The memory requirements for inflate are (in bytes) 1 << windowBits
that is, 32K for windowBits=15 (default value) plus a few kilobytes
for small objects.
*/
/* Type declarations */
#ifndef OF /* function prototypes */
# ifdef STDC
# define OF(args) args
# else
# define OF(args) ()
# endif
#endif
typedef unsigned char Byte; /* 8 bits */
typedef unsigned int uInt; /* 16 bits or more */
typedef unsigned long uLong; /* 32 bits or more */
typedef Byte FAR Bytef;
typedef char FAR charf;
typedef int FAR intf;
typedef uInt FAR uIntf;
typedef uLong FAR uLongf;
#ifdef STDC
typedef void FAR *voidpf;
typedef void *voidp;
#else
typedef Byte FAR *voidpf;
typedef Byte *voidp;
#endif
/* end of original zconf.h */
#define ZLIB_VERSION "0.95P"
/*
The 'zlib' compression library provides in-memory compression and
decompression functions, including integrity checks of the uncompressed
data. This version of the library supports only one compression method
(deflation) but other algorithms may be added later and will have the same
stream interface.
For compression the application must provide the output buffer and
may optionally provide the input buffer for optimization. For decompression,
the application must provide the input buffer and may optionally provide
the output buffer for optimization.
Compression can be done in a single step if the buffers are large
enough (for example if an input file is mmap'ed), or can be done by
repeated calls of the compression function. In the latter case, the
application must provide more input and/or consume the output
(providing more output space) before each call.
*/
typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
typedef void (*free_func) OF((voidpf opaque, voidpf address, uInt nbytes));
struct internal_state;
typedef struct z_stream_s {
Bytef *next_in; /* next input byte */
uInt avail_in; /* number of bytes available at next_in */
uLong total_in; /* total nb of input bytes read so far */
Bytef *next_out; /* next output byte should be put there */
uInt avail_out; /* remaining free space at next_out */
uLong total_out; /* total nb of bytes output so far */
char *msg; /* last error message, NULL if no error */
struct internal_state FAR *state; /* not visible by applications */
alloc_func zalloc; /* used to allocate the internal state */
free_func zfree; /* used to free the internal state */
voidp opaque; /* private data object passed to zalloc and zfree */
Byte data_type; /* best guess about the data type: ascii or binary */
} z_stream;
/*
The application must update next_in and avail_in when avail_in has
dropped to zero. It must update next_out and avail_out when avail_out
has dropped to zero. The application must initialize zalloc, zfree and
opaque before calling the init function. All other fields are set by the
compression library and must not be updated by the application.
The opaque value provided by the application will be passed as the first
parameter for calls of zalloc and zfree. This can be useful for custom
memory management. The compression library attaches no meaning to the
opaque value.
zalloc must return Z_NULL if there is not enough memory for the object.
On 16-bit systems, the functions zalloc and zfree must be able to allocate
exactly 65536 bytes, but will not be required to allocate more than this
if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
pointers returned by zalloc for objects of exactly 65536 bytes *must*
have their offset normalized to zero. The default allocation function
provided by this library ensures this (see zutil.c). To reduce memory
requirements and avoid any allocation of 64K objects, at the expense of
compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
The fields total_in and total_out can be used for statistics or
progress reports. After compression, total_in holds the total size of
the uncompressed data and may be saved for use in the decompressor
(particularly if the decompressor wants to decompress everything in
a single step).
*/
/* constants */
#define Z_NO_FLUSH 0
#define Z_PARTIAL_FLUSH 1
#define Z_FULL_FLUSH 2
#define Z_SYNC_FLUSH 3 /* experimental: partial_flush + byte align */
#define Z_FINISH 4
#define Z_PACKET_FLUSH 5
/* See deflate() below for the usage of these constants */
#define Z_OK 0
#define Z_STREAM_END 1
#define Z_ERRNO (-1)
#define Z_STREAM_ERROR (-2)
#define Z_DATA_ERROR (-3)
#define Z_MEM_ERROR (-4)
#define Z_BUF_ERROR (-5)
/* error codes for the compression/decompression functions */
#define Z_BEST_SPEED 1
#define Z_BEST_COMPRESSION 9
#define Z_DEFAULT_COMPRESSION (-1)
/* compression levels */
#define Z_FILTERED 1
#define Z_HUFFMAN_ONLY 2
#define Z_DEFAULT_STRATEGY 0
#define Z_BINARY 0
#define Z_ASCII 1
#define Z_UNKNOWN 2
/* Used to set the data_type field */
#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
extern char *zlib_version;
/* The application can compare zlib_version and ZLIB_VERSION for consistency.
If the first character differs, the library code actually used is
not compatible with the zlib.h header file used by the application.
*/
/* basic functions */
extern int inflateInit OF((z_stream *strm));
/*
Initializes the internal stream state for decompression. The fields
zalloc and zfree must be initialized before by the caller. If zalloc and
zfree are set to Z_NULL, inflateInit updates them to use default allocation
functions.
inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory. msg is set to null if there is no error message.
inflateInit does not perform any decompression: this will be done by
inflate().
*/
extern int inflate OF((z_stream *strm, int flush));
/*
Performs one or both of the following actions:
- Decompress more input starting at next_in and update next_in and avail_in
accordingly. If not all input can be processed (because there is not
enough room in the output buffer), next_in is updated and processing
will resume at this point for the next call of inflate().
- Provide more output starting at next_out and update next_out and avail_out
accordingly. inflate() always provides as much output as possible
(until there is no more input data or no more space in the output buffer).
Before the call of inflate(), the application should ensure that at least
one of the actions is possible, by providing more input and/or consuming
more output, and updating the next_* and avail_* values accordingly.
The application can consume the uncompressed output when it wants, for
example when the output buffer is full (avail_out == 0), or after each
call of inflate().
If the parameter flush is set to Z_PARTIAL_FLUSH or Z_PACKET_FLUSH,
inflate flushes as much output as possible to the output buffer. The
flushing behavior of inflate is not specified for values of the flush
parameter other than Z_PARTIAL_FLUSH, Z_PACKET_FLUSH or Z_FINISH, but the
current implementation actually flushes as much output as possible
anyway. For Z_PACKET_FLUSH, inflate checks that once all the input data
has been consumed, it is expecting to see the length field of a stored
block; if not, it returns Z_DATA_ERROR.
inflate() should normally be called until it returns Z_STREAM_END or an
error. However if all decompression is to be performed in a single step
(a single call of inflate), the parameter flush should be set to
Z_FINISH. In this case all pending input is processed and all pending
output is flushed; avail_out must be large enough to hold all the
uncompressed data. (The size of the uncompressed data may have been saved
by the compressor for this purpose.) The next operation on this stream must
be inflateEnd to deallocate the decompression state. The use of Z_FINISH
is never required, but can be used to inform inflate that a faster routine
may be used for the single inflate() call.
inflate() returns Z_OK if some progress has been made (more input
processed or more output produced), Z_STREAM_END if the end of the
compressed data has been reached and all uncompressed output has been
produced, Z_DATA_ERROR if the input data was corrupted, Z_STREAM_ERROR if
the stream structure was inconsistent (for example if next_in or next_out
was NULL), Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR if no
progress is possible or if there was not enough room in the output buffer
when Z_FINISH is used. In the Z_DATA_ERROR case, the application may then
call inflateSync to look for a good compression block. */
extern int inflateEnd OF((z_stream *strm));
/*
All dynamically allocated data structures for this stream are freed.
This function discards any unprocessed input and does not flush any
pending output.
inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
was inconsistent. In the error case, msg may be set but then points to a
static string (which must not be deallocated).
*/
/* advanced functions */
extern int inflateInit2 OF((z_stream *strm,
int windowBits));
/*
This is another version of inflateInit with more compression options. The
fields next_out, zalloc and zfree must be initialized before by the caller.
The windowBits parameter is the base two logarithm of the maximum window
size (the size of the history buffer). It should be in the range 8..15 for
this version of the library (the value 16 will be allowed soon). The
default value is 15 if inflateInit is used instead. If a compressed stream
with a larger window size is given as input, inflate() will return with
the error code Z_DATA_ERROR instead of trying to allocate a larger window.
If next_out is not null, the library will use this buffer for the history
buffer; the buffer must either be large enough to hold the entire output
data, or have at least 1<<windowBits bytes. If next_out is null, the
library will allocate its own buffer (and leave next_out null). next_in
need not be provided here but must be provided by the application for the
next call of inflate().
If the history buffer is provided by the application, next_out must
never be changed by the application since the decompressor maintains
history information inside this buffer from call to call; the application
can only reset next_out to the beginning of the history buffer when
avail_out is zero and all output has been consumed.
inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was
not enough memory, Z_STREAM_ERROR if a parameter is invalid (such as
windowBits < 8). msg is set to null if there is no error message.
inflateInit2 does not perform any decompression: this will be done by
inflate().
*/
extern int inflateSync OF((z_stream *strm));
/*
Skips invalid compressed data until the special marker (see deflate()
above) can be found, or until all available input is skipped. No output
is provided.
inflateSync returns Z_OK if the special marker has been found, Z_BUF_ERROR
if no more input was provided, Z_DATA_ERROR if no marker has been found,
or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
case, the application may save the current current value of total_in which
indicates where valid compressed data was found. In the error case, the
application may repeatedly call inflateSync, providing more input each time,
until success or end of the input data.
*/
extern int inflateReset OF((z_stream *strm));
/*
This function is equivalent to inflateEnd followed by inflateInit,
but does not free and reallocate all the internal decompression state.
The stream will keep attributes that may have been set by inflateInit2.
inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being NULL).
*/
extern int inflateIncomp OF((z_stream *strm));
/*
This function adds the data at next_in (avail_in bytes) to the output
history without performing any output. There must be no pending output,
and the decompressor must be expecting to see the start of a block.
Calling this function is equivalent to decompressing a stored block
containing the data at next_in (except that the data is not output).
*/
/* checksum functions */
/*
This function is not related to compression but is exported
anyway because it might be useful in applications using the
compression library.
*/
extern uLong adler32 OF((uLong adler, Bytef *buf, uInt len));
/*
Update a running Adler-32 checksum with the bytes buf[0..len-1] and
return the updated checksum. If buf is NULL, this function returns
the required initial value for the checksum.
An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
much faster. Usage example:
uLong adler = adler32(0L, Z_NULL, 0);
while (read_buffer(buffer, length) != EOF) {
adler = adler32(adler, buffer, length);
}
if (adler != original_adler) error();
*/
#ifndef _Z_UTIL_H
struct internal_state {int dummy;}; /* hack for buggy compilers */
#endif
#endif /* _ZLIB_H */
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