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Third Party Zlib
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56bcb184
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Third Party Zlib
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Third Party Zlib
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56bcb184
编写于
9月 09, 2011
作者:
M
Mark Adler
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
zlib 0.99
上级
25e53255
变更
33
展开全部
隐藏空白更改
内联
并排
Showing
33 changed file
with
1836 addition
and
778 deletion
+1836
-778
ChangeLog
ChangeLog
+61
-0
Make_vms.com
Make_vms.com
+1
-1
Makefile
Makefile
+88
-31
Makefile.bor
Makefile.bor
+1
-1
Makefile.in
Makefile.in
+130
-0
Makefile.qnx
Makefile.qnx
+0
-75
README
README
+68
-33
adler32.c
adler32.c
+2
-2
compress.c
compress.c
+4
-3
configure
configure
+81
-0
crc32.c
crc32.c
+51
-9
deflate.c
deflate.c
+287
-112
deflate.h
deflate.h
+13
-13
example.c
example.c
+263
-59
gzio.c
gzio.c
+210
-160
infblock.c
infblock.c
+18
-7
infblock.h
infblock.h
+7
-1
infcodes.c
infcodes.c
+6
-5
infcodes.h
infcodes.h
+1
-1
inffast.c
inffast.c
+6
-5
inffast.h
inffast.h
+1
-1
inflate.c
inflate.c
+83
-20
inftrees.c
inftrees.c
+38
-39
inftrees.h
inftrees.h
+1
-1
infutil.c
infutil.c
+4
-4
infutil.h
infutil.h
+18
-11
minigzip.c
minigzip.c
+11
-10
trees.c
trees.c
+74
-60
uncompr.c
uncompr.c
+3
-3
zconf.h
zconf.h
+63
-23
zlib.h
zlib.h
+198
-61
zutil.c
zutil.c
+28
-18
zutil.h
zutil.h
+16
-9
未找到文件。
ChangeLog
浏览文件 @
56bcb184
ChangeLog file for zlib
Changes in 1.0 (15 Jan 96)
- allow preset dictionary shared between compressor and decompressor
- allow compression level 0 (no compression)
- add deflateParams in zlib.h: allow dynamic change of compression level
and compression strategy.
- test large buffers and deflateParams in example.c
- add optional "configure" to build zlib as a shared library
- suppress Makefile.qnx, use configure instead
- fixed deflate for 64-bit systems (detected on Cray)
- fixed inflate_blocks for 64-bit systems (detected on Alpha)
- declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2)
- always return Z_BUF_ERROR when deflate() has nothing to do
- deflateInit and inflateInit are now macros to allow version checking
- prefix all global functions and types with z_ with -DZ_PREFIX
- make falloc completely reentrant (inftrees.c)
- fixed very unlikely race condition in ct_static_init
- free in reverse order of allocation to help memory manager
- use zlib-1.0/* instead of zlib/* inside the tar.gz
- make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith
-Wconversion -Wstrict-prototypes -Wmissing-prototypes"
- allow gzread on concatenated .gz files
- deflateEnd now returns Z_DATA_ERROR if it was premature
- deflate is finally (?) fully deterministic (no matches beyond end of input)
- Document Z_SYNC_FLUSH
- add uninstall in Makefile
- Check for __cpluplus in zlib.h
- Better test in ct_align for partial flush
- avoid harmless warnings for Borland C++
- initialize hash_head in deflate.c
- avoid warning on fdopen (gzio.c) for HP cc -Aa
- include stdlib.h for STDC compilers
- include errno.h for Cray
- ignore error if ranlib doesn't exist
- call ranlib twice for NeXTSTEP
- use exec_prefix instead of prefix for libz.a
- renamed ct_* as _tr_* to avoid conflict with applications
- clear z->msg in inflateInit2 before any error return
- initialize opaque in example.c, gzio.c, deflate.c and inflate.c
- fixed typo in zconf.h (_GNUC__ => __GNUC__)
- check for WIN32 in zconf.h and zutil.c (avoid farmalloc in 32-bit mode)
- fix typo in Make_vms.com (f$trnlnm -> f$getsyi)
- in fcalloc, normalize pointer if size > 65520 bytes
- don't use special fcalloc for 32 bit Borland C++
- use STDC instead of __GO32__ to avoid redeclaring exit, calloc, etc...
- use Z_BINARY instead of BINARY
- document that gzclose after gzdopen will close the file
- allow "a" as mode in gzopen.
- fix error checking in gzread
- allow skipping .gz extra-field on pipes
- added reference to Perl interface in README
- put the crc table in FAR data (I dislike more and more the medium model :)
- added get_crc_table
- added a dimension to all arrays (Borland C can't count).
- workaround Borland C bug in declaration of inflate_codes_new & inflate_fast
- guard against multiple inclusion of *.h (for precompiled header on Mac)
- Watcom C pretends to be Microsoft C small model even in 32 bit mode.
- don't use unsized arrays to avoid silly warnings by Visual C++:
warning C4746: 'inflate_mask' : unsized array treated as '__far'
(what's wrong with far data in far model?).
- define enum out of inflate_blocks_state to allow compilation with C++
Changes in 0.95 (16 Aug 95)
- fix MSDOS small and medium model (now easier to adapt to any compiler)
- inlined send_bits
...
...
Make_vms.com
浏览文件 @
56bcb184
...
...
@@ -4,7 +4,7 @@ $!
$! Look for the compiler used
$!
$ ccopt = ""
$ if f$
trnlnm
("HW_MODEL").ge.1024
$ if f$
getsyi
("HW_MODEL").ge.1024
$ then
$ ccopt = "/prefix=all"+ccopt
$ comp = "__decc__=1"
...
...
Makefile
浏览文件 @
56bcb184
# Makefile for zlib
# Copyright (C) 1995 Jean-loup Gailly.
# Copyright (C) 1995
-1996
Jean-loup Gailly.
# For conditions of distribution and use, see copyright notice in zlib.h
# To compile and test, type:
# ./configure; make test
# The call of configure is optional if you don't have special requirements
# To install /usr/local/lib/libz.* and /usr/local/include/zlib.h, type:
# make install
# To install in $HOME instead of /usr/local, use:
# make install prefix=$HOME
CC
=
cc
CFLAGS
=
-O
#use -O3 for gcc to take advantage of inlining
#CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
#CFLAGS=-g -DDEBUG
#CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
# -Wstrict-prototypes -Wmissing-prototypes
LDFLAGS
=
-L
.
-lz
LDSHARED
=
$(CC)
VER
=
1.0
LIBS
=
libz.a
AR
=
ar rc
RANLIB
=
ranlib
TAR
=
tar
prefix
=
/usr/local
exec_prefix
=
$(prefix)
OBJS
=
adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o
\
zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
TEST_OBJS
=
example.o minigzip.o
DISTFILES
=
README ChangeLog configure Makefile.in Makefile Makefile.msc
\
Makefile.bor Makefile.tc Make_vms.com descrip.mms
*
.[ch]
all
:
example minigzip
test
:
all
./example
echo
hello world | ./minigzip | ./minigzip
-d
install
:
libz.a
-
@mkdir
$(prefix)
/include
-
@mkdir
$(prefix)
/lib
cp
zlib.h zconf.h
$(prefix)
/include
chmod
644
$(prefix)
/include/zlib.h
$(prefix)
/include/zconf.h
cp
libz.a
$(prefix)
/lib
chmod
644
$(prefix)
/lib/libz.a
libz.a
:
$(OBJS)
ar rc
$@
$(OBJS)
$(RANLIB)
$@
$(AR)
$@
$(OBJS)
-
@
(
$(RANLIB)
$@
||
true
)
2>/dev/null
example
:
example.o libz.a
libz.so.$(VER)
:
$(OBJS)
$(LDSHARED)
-o
$@
$(OBJS)
rm
-f
libz.so
;
ln
-s
$@
libz.so
example
:
example.o $(LIBS)
$(CC)
$(CFLAGS)
-o
$@
example.o
$(LDFLAGS)
minigzip
:
minigzip.o
libz.a
minigzip
:
minigzip.o
$(LIBS)
$(CC)
$(CFLAGS)
-o
$@
minigzip.o
$(LDFLAGS)
install
:
$(LIBS)
-
@if
[
!
$(prefix)
/include
]
;
then
mkdir
$(prefix)
/include
;
fi
-
@if
[
!
$(exec_prefix)
/lib
]
;
then
mkdir
$(exec_prefix)
/lib
;
fi
cp
zlib.h zconf.h
$(prefix)
/include
chmod
644
$(prefix)
/include/zlib.h
$(prefix)
/include/zconf.h
cp
$(LIBS)
$(exec_prefix)
/lib
cd
$(exec_prefix)
/lib
;
chmod
644
$(LIBS)
-
@
(
cd
$(exec_prefix)
/lib
;
$(RANLIB)
libz.a
||
true
)
>
/dev/null 2>&1
cd
$(exec_prefix)
/lib
;
if
test
-f
libz.so.
$(VER)
;
then
\
ln
-s
libz.so.
$(VER)
libz.so
;
\
fi
# The ranlib in install is needed on NeXTSTEP which checks file times
uninstall
:
cd
$(exec_prefix)
/lib
;
rm
-f
$(LIBS)
;
\
if
test
-f
libz.so
;
then
\
v
=
`
sed
-n
'/VERSION "/s/.*"\(.*\)".*/\1/p'
<
$(prefix)
/include/zlib.h
`
;
\
rm
-f
libz.so.
$$
v libz.so
;
\
fi
cd
$(prefix)
/include
;
rm
-f
zlib.h zconf.h
clean
:
rm
-f
*
.o
example minigzip libz.a
foo.gz
rm
-f
*
.o
*
~ example minigzip libz.a libz.so
*
foo.gz
zip
:
zip
-ul9
zlib README ChangeLog Makefile Make????.??? Makefile.??
\
descrip.mms
*
.[ch]
tgz
:
cd
..
;
tar
cfz zlib/zlib.tgz zlib/README zlib/ChangeLog zlib/Makefile
\
zlib/Make????.??? zlib/Makefile.?? zlib/descrip.mms zlib/
*
.[ch]
mv
Makefile Makefile~
;
cp
-p
Makefile.in Makefile
v
=
`
sed
-n
-e
's/\./-/'
-e
'/VERSION "/s/.*"\(.*\)".*/\1/p'
< zlib.h
`
;
\
zip
-ul9
zlib-
$$
v
$(DISTFILES)
mv
Makefile~ Makefile
dist
:
mv
Makefile Makefile~
;
cp
-p
Makefile.in Makefile
d
=
zlib-
`
sed
-n
'/VERSION "/s/.*"\(.*\)".*/\1/p'
< zlib.h
`
;
\
rm
-f
$$
d.tar.gz
;
\
if
test
!
-d
../
$$
d
;
then
rm
-f
../
$$
d
;
ln
-s
`
pwd
`
../
$$
d
;
fi
;
\
files
=
""
;
\
for
f
in
$(DISTFILES)
;
do
files
=
"
$$
files
$$
d/
$$
f"
;
done
;
\
cd
..
;
\
GZIP
=
-9
$(TAR)
chofz
$$
d/
$$
d.tar.gz
$$
files
;
\
if
test
!
-d
$$
d
;
then
rm
-f
$$
d
;
fi
mv
Makefile~ Makefile
tags
:
etags
*
.[ch]
depend
:
makedepend
--
$(CFLAGS)
--
*
.[ch]
# DO NOT DELETE THIS LINE -- make depend depends on it.
adler32.o
:
z
util.h z
lib.h zconf.h
adler32.o
:
zlib.h zconf.h
compress.o
:
zlib.h zconf.h
crc32.o
:
z
util.h z
lib.h zconf.h
crc32.o
:
zlib.h zconf.h
deflate.o
:
deflate.h zutil.h zlib.h zconf.h
example.o
:
zlib.h zconf.h
gzio.o
:
zutil.h zlib.h zconf.h
infblock.o
:
zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
infcodes.o
:
zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
inffast.o
:
zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
infblock.o
:
infblock.h inftrees.h infcodes.h infutil.h zutil.h zlib.h zconf.h
infcodes.o
:
zutil.h zlib.h zconf.h
infcodes.o
:
inftrees.h infblock.h infcodes.h infutil.h inffast.h
inffast.o
:
zutil.h zlib.h zconf.h inftrees.h
inffast.o
:
infblock.h infcodes.h infutil.h inffast.h
inflate.o
:
zutil.h zlib.h zconf.h infblock.h
inftrees.o
:
zutil.h zlib.h zconf.h inftrees.h
infutil.o
:
zutil.h zlib.h zconf.h inf
tre
es.h infutil.h
minigzip.o
:
zlib.h zconf.h
trees.o
:
deflate.h zutil.h zlib.h zconf.h
infutil.o
:
zutil.h zlib.h zconf.h inf
block.h inftrees.h infcod
es.h infutil.h
minigzip.o
:
zlib.h zconf.h
trees.o
:
deflate.h zutil.h zlib.h zconf.h
uncompr.o
:
zlib.h zconf.h
zutil.o
:
zutil.h zlib.h zconf.h
zutil.o
:
zutil.h zlib.h zconf.h
Makefile.bor
浏览文件 @
56bcb184
...
...
@@ -18,7 +18,7 @@ CFLAGS=-O2 -Z $(MODEL)
CC
=
bcc
LD
=
bcc
LIB
=
tlib
# replace bcc with tcc for Turbo C++ 1.0
# replace bcc with tcc for Turbo C++ 1.0
, with bcc32 for the 32 bit version
LDFLAGS
=
$(MODEL)
O
=
.obj
...
...
Makefile.in
0 → 100644
浏览文件 @
56bcb184
# Makefile for zlib
# Copyright (C) 1995-1996 Jean-loup Gailly.
# For conditions of distribution and use, see copyright notice in zlib.h
# To compile and test, type:
# ./configure; make test
# The call of configure is optional if you don't have special requirements
# To install /usr/local/lib/libz.* and /usr/local/include/zlib.h, type:
# make install
# To install in $HOME instead of /usr/local, use:
# make install prefix=$HOME
CC
=
cc
CFLAGS
=
-O
#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
#CFLAGS=-g -DDEBUG
#CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
# -Wstrict-prototypes -Wmissing-prototypes
LDFLAGS
=
-L
.
-lz
LDSHARED
=
$(CC)
VER
=
1.0
LIBS
=
libz.a
AR
=
ar rc
RANLIB
=
ranlib
TAR
=
tar
prefix
=
/usr/local
exec_prefix
=
$(prefix)
OBJS
=
adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o
\
zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
TEST_OBJS
=
example.o minigzip.o
DISTFILES
=
README ChangeLog configure Makefile.in Makefile Makefile.msc
\
Makefile.bor Makefile.tc Make_vms.com descrip.mms
*
.[ch]
all
:
example minigzip
test
:
all
./example
echo
hello world | ./minigzip | ./minigzip
-d
libz.a
:
$(OBJS)
$(AR)
$@
$(OBJS)
-
@
(
$(RANLIB)
$@
||
true
)
2>/dev/null
libz.so.$(VER)
:
$(OBJS)
$(LDSHARED)
-o
$@
$(OBJS)
rm
-f
libz.so
;
ln
-s
$@
libz.so
example
:
example.o $(LIBS)
$(CC)
$(CFLAGS)
-o
$@
example.o
$(LDFLAGS)
minigzip
:
minigzip.o $(LIBS)
$(CC)
$(CFLAGS)
-o
$@
minigzip.o
$(LDFLAGS)
install
:
$(LIBS)
-
@if
[
!
$(prefix)
/include
]
;
then
mkdir
$(prefix)
/include
;
fi
-
@if
[
!
$(exec_prefix)
/lib
]
;
then
mkdir
$(exec_prefix)
/lib
;
fi
cp
zlib.h zconf.h
$(prefix)
/include
chmod
644
$(prefix)
/include/zlib.h
$(prefix)
/include/zconf.h
cp
$(LIBS)
$(exec_prefix)
/lib
cd
$(exec_prefix)
/lib
;
chmod
644
$(LIBS)
-
@
(
cd
$(exec_prefix)
/lib
;
$(RANLIB)
libz.a
||
true
)
>
/dev/null 2>&1
cd
$(exec_prefix)
/lib
;
if
test
-f
libz.so.
$(VER)
;
then
\
ln
-s
libz.so.
$(VER)
libz.so
;
\
fi
# The ranlib in install is needed on NeXTSTEP which checks file times
uninstall
:
cd
$(exec_prefix)
/lib
;
rm
-f
$(LIBS)
;
\
if
test
-f
libz.so
;
then
\
v
=
`
sed
-n
'/VERSION "/s/.*"\(.*\)".*/\1/p'
<
$(prefix)
/include/zlib.h
`
;
\
rm
-f
libz.so.
$$
v libz.so
;
\
fi
cd
$(prefix)
/include
;
rm
-f
zlib.h zconf.h
clean
:
rm
-f
*
.o
*
~ example minigzip libz.a libz.so
*
foo.gz
zip
:
mv
Makefile Makefile~
;
cp
-p
Makefile.in Makefile
v
=
`
sed
-n
-e
's/\./-/'
-e
'/VERSION "/s/.*"\(.*\)".*/\1/p'
< zlib.h
`
;
\
zip
-ul9
zlib-
$$
v
$(DISTFILES)
mv
Makefile~ Makefile
dist
:
mv
Makefile Makefile~
;
cp
-p
Makefile.in Makefile
d
=
zlib-
`
sed
-n
'/VERSION "/s/.*"\(.*\)".*/\1/p'
< zlib.h
`
;
\
rm
-f
$$
d.tar.gz
;
\
if
test
!
-d
../
$$
d
;
then
rm
-f
../
$$
d
;
ln
-s
`
pwd
`
../
$$
d
;
fi
;
\
files
=
""
;
\
for
f
in
$(DISTFILES)
;
do
files
=
"
$$
files
$$
d/
$$
f"
;
done
;
\
cd
..
;
\
GZIP
=
-9
$(TAR)
chofz
$$
d/
$$
d.tar.gz
$$
files
;
\
if
test
!
-d
$$
d
;
then
rm
-f
$$
d
;
fi
mv
Makefile~ Makefile
tags
:
etags
*
.[ch]
depend
:
makedepend
--
$(CFLAGS)
--
*
.[ch]
# DO NOT DELETE THIS LINE -- make depend depends on it.
adler32.o
:
zlib.h zconf.h
compress.o
:
zlib.h zconf.h
crc32.o
:
zlib.h zconf.h
deflate.o
:
deflate.h zutil.h zlib.h zconf.h
example.o
:
zlib.h zconf.h
gzio.o
:
zutil.h zlib.h zconf.h
infblock.o
:
infblock.h inftrees.h infcodes.h infutil.h zutil.h zlib.h zconf.h
infcodes.o
:
zutil.h zlib.h zconf.h
infcodes.o
:
inftrees.h infblock.h infcodes.h infutil.h inffast.h
inffast.o
:
zutil.h zlib.h zconf.h inftrees.h
inffast.o
:
infblock.h infcodes.h infutil.h inffast.h
inflate.o
:
zutil.h zlib.h zconf.h infblock.h
inftrees.o
:
zutil.h zlib.h zconf.h inftrees.h
infutil.o
:
zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
minigzip.o
:
zlib.h zconf.h
trees.o
:
deflate.h zutil.h zlib.h zconf.h
uncompr.o
:
zlib.h zconf.h
zutil.o
:
zutil.h zlib.h zconf.h
Makefile.qnx
已删除
100644 → 0
浏览文件 @
25e53255
# Makefile for zlib
# Copyright (C) 1995 Jean-loup Gailly.
# For conditions of distribution and use, see copyright notice in zlib.h
# Modified slightly for QNX by Chris Herborth (chrish@qnx.com)
CC
=
cc
CFLAGS
=
-4
-O
-Q
#use -O3 for gcc to take advantage of inlining
#CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
#CFLAGS=-g -DDEBUG
LDFLAGS
=
-L
.
-lz
#RANLIB=ranlib
prefix
=
/usr/local
OBJS
=
adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o
\
zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
TEST_OBJS
=
example.o minigzip.o
all
:
example minigzip
test
:
all
./example
echo
hello world | ./minigzip | ./minigzip
-d
install
:
zlib.lib
-
@mkdir
$(prefix)
/include
-
@mkdir
$(prefix)
/lib
cp
zlib.h zconf.h
$(prefix)
/include
chmod
644
$(prefix)
/include/zlib.h
$(prefix)
/include/zconf.h
cp
zlib.lib
$(prefix)
/lib
chmod
644
$(prefix)
/lib/zlib.lib
zlib.lib
:
$(OBJS)
cc
-A
$@
$(OBJS)
# ar rc $@ $(OBJS)
# $(RANLIB) $@
example
:
example.o zlib.lib
$(CC)
$(CFLAGS)
-o
$@
example.o
$(LDFLAGS)
minigzip
:
minigzip.o zlib.lib
$(CC)
$(CFLAGS)
-o
$@
minigzip.o
$(LDFLAGS)
clean
:
rm
-f
*
.o example minigzip zlib.lib foo.gz
zip
:
zip
-ul9
zlib README ChangeLog Makefile Makefile.??? Makefile.??
*
.[ch]
tgz
:
cd
..
;
tar
cfz zlib/zlib.tgz zlib/README zlib/ChangeLog zlib/Makefile
\
zlib/Makefile.??? zlib/Makefile.?? zlib/
*
.[ch]
# DO NOT DELETE THIS LINE -- make depend depends on it.
adler32.o
:
zutil.h zlib.h zconf.h
compress.o
:
zlib.h zconf.h
crc32.o
:
zutil.h zlib.h zconf.h
deflate.o
:
deflate.h zutil.h zlib.h zconf.h
example.o
:
zlib.h zconf.h
gzio.o
:
zutil.h zlib.h zconf.h
infblock.o
:
zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
infcodes.o
:
zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
inffast.o
:
zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
inflate.o
:
zutil.h zlib.h zconf.h infblock.h
inftrees.o
:
zutil.h zlib.h zconf.h inftrees.h
infutil.o
:
zutil.h zlib.h zconf.h inftrees.h infutil.h
minigzip.o
:
zlib.h zconf.h
trees.o
:
deflate.h zutil.h zlib.h zconf.h
uncompr.o
:
zlib.h zconf.h
zutil.o
:
zutil.h zlib.h zconf.h
README
浏览文件 @
56bcb184
zlib 0.95 is a beta version of a general purpose compression library.
This should be the last version before the first official
version (1.0), so please test it now. (At least compile and run it with
"make test"). This version has no known bugs.
The data format used by the zlib library is described in the
files zlib-3.1.doc, deflate-1.1.doc and gzip-4.1.doc, available
in ftp.uu.net:/pub/archiving/zip/doc.
zlib 1.0 is a general purpose data compression library. All the code
is reentrant (thread safe). The data format used by the zlib library
is described in the files zlib-3.3.doc, deflate-1.3.doc and
gzip-4.3.doc, available in ftp://ftp.uu.net/pub/archiving/zip/doc/
All functions of the compression library are documented in the file
zlib.h. A usage example of the library is given in the file example.c
which also tests that the library is working correctly. Another
example is given in the file minigzip.c.
To compile all files and run the test program, just type: make test
(For MSDOS, use one of the special makefiles such as Makefile.msc;
for VMS, use Make_vms.com or descrip.mms.)
To install the zlib library (libz.a) in /usr/local/lib, type: make install
To install in a different directory, use for example:
make install prefix=$HOME
This will install in $HOME/lib instead of /usr/local/lib.
The changes made in version 0.95 are documented in the file ChangeLog.
The main changes since 0.94 are:
- fix MSDOS small and medium model (now easier to adapt to any compiler)
- inlined send_bits
- fix the final (:-) bug for deflate with flush (output was correct but
not completely flushed in rare occasions).
For MSDOS, the small and medium models have been tested only with Microsoft C.
(This should now work for Borland C also, but I don't have a recent Borland
compiler to test with.) The small model was tested with Turbo C but only with
reduced performance to avoid any far allocation; it was tested with
-DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
(C) 1995 Jean-loup Gailly and Mark Adler
example is given in the file minigzip.c. The compression library itself
is composed of all source files except example.c and minigzip.c.
To compile all files and run the test program, follow the instructions
given at the top of Makefile. In short "make test; make install"
should work for most machines. For MSDOS, use one of the special
makefiles such as Makefile.msc; for VMS, use Make_vms.com or descrip.mms.
Questions about zlib should be sent to <zlib@quest.jpl.nasa.gov> or,
if this fails, to the addresses given below in the Copyright section.
The changes made in version 1.0 are documented in the file ChangeLog.
The main changes since 0.95 are:
- allow preset dictionary shared between compressor and decompressor
- allow compression level 0 (no compression)
- add deflateParams in zlib.h: allow dynamic change of compression level
and compression strategy.
- test large buffers and deflateParams in example.c
- add optional "configure" to build zlib as a shared library
- suppress Makefile.qnx, use configure instead
- fixes for 64-bit systems (needed for Alpha and Cray)
- declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2)
- always return Z_BUF_ERROR when deflate() has nothing to do
- deflateInit and inflateInit are now macros to allow version checking
- prefix all global functions and types with z_ with -DZ_PREFIX
- fix some very unlikely race conditions in multi-threaded environment
- several minor fixes for better portability
- free in reverse order of allocation to help memory manager
- use zlib-1.0/* instead of zlib/* inside the tar.gz
- make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith
-Wconversion -Wstrict-prototypes -Wmissing-prototypes"
- allow gzread on concatenated .gz files
- deflateEnd now returns Z_DATA_ERROR if it was premature
- deflate is finally (?) fully deterministic
Notes for some targets:
- For Turbo C the small model is supported only with reduced performance to
avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
- For 64-bit Iris, deflate.c must be compiled without any optimization.
With -O, one libpng test fails. The test works in 32 bit mode (with the
-32 compiler flag).
- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1
it works when compiled with cc.
- zlib doesn't work on HP-UX 9.05 with one cc compiler (the one not
accepting the -O option). It works with the other cc compiler.
A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk>
is in the CPAN (Comprehensive Perl Archive Network) sites, such as:
ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
Acknowledgments:
The deflate format used by zlib was defined by Phil Katz. The deflate
and zlib specifications were written by Peter Deutsch. Thanks to all the
people who reported problems and suggested various improvements in zlib;
they are too numerous to cite here.
Copyright notice:
(C) 1995-1996 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
...
...
adler32.c
浏览文件 @
56bcb184
/* adler32.c -- compute the Adler-32 checksum of a data stream
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -20,7 +20,7 @@
/* ========================================================================= */
uLong
adler32
(
adler
,
buf
,
len
)
uLong
adler
;
Bytef
*
buf
;
const
Bytef
*
buf
;
uInt
len
;
{
unsigned
long
s1
=
adler
&
0xffff
;
...
...
compress.c
浏览文件 @
56bcb184
/* compress.c -- compress a memory buffer
* Copyright (C) 1995 Jean-loup Gailly.
* Copyright (C) 1995
-1996
Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -22,13 +22,13 @@
int
compress
(
dest
,
destLen
,
source
,
sourceLen
)
Bytef
*
dest
;
uLongf
*
destLen
;
Bytef
*
source
;
const
Bytef
*
source
;
uLong
sourceLen
;
{
z_stream
stream
;
int
err
;
stream
.
next_in
=
source
;
stream
.
next_in
=
(
Bytef
*
)
source
;
stream
.
avail_in
=
(
uInt
)
sourceLen
;
/* Check for source > 64K on 16-bit machine: */
if
((
uLong
)
stream
.
avail_in
!=
sourceLen
)
return
Z_BUF_ERROR
;
...
...
@@ -39,6 +39,7 @@ int compress (dest, destLen, source, sourceLen)
stream
.
zalloc
=
(
alloc_func
)
0
;
stream
.
zfree
=
(
free_func
)
0
;
stream
.
opaque
=
(
voidpf
)
0
;
err
=
deflateInit
(
&
stream
,
Z_DEFAULT_COMPRESSION
);
if
(
err
!=
Z_OK
)
return
err
;
...
...
configure
0 → 100755
浏览文件 @
56bcb184
#!/bin/sh
# configure script for zlib. This script is needed only if
# you wish to build a shared library and your system supports them,
# of if you need special compiler, flags or install directory.
# Otherwise, you can just use directly "make test; make install"
#
# To impose specific compiler or flags or install directory, use for example:
# prefix=$HOME CC=cc CFLAGS="-O4" ./configure
# or for csh/tcsh users:
# (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)
# LDSHARED is the command to be used to create a shared library
LIBS
=
libz.a
VER
=
`
sed
-n
-e
'/VERSION "/s/.*"\(.*\)".*/\1/p'
< zlib.h
`
AR
=
${
AR
-
"ar rc"
}
prefix
=
${
prefix
-/usr/local
}
exec_prefix
=
${
exec_prefix
-
$prefix
}
test
-z
"
$CC
"
&&
echo
Checking
for
gcc...
test
=
ztest
$$
cat
>
$test
.c
<<
EOF
int hello() { printf("hello
\n
"); }
EOF
if
test
-z
"
$CC
"
&&
(
gcc
-c
-O3
$test
.c
)
2>/dev/null
;
then
CC
=
gcc
SFLAGS
=
${
CFLAGS
-
"-fPIC -O3"
}
CFLAGS
=
${
CFLAGS
-
"-O3"
}
LDSHARED
=
${
LDSHARED
-
"gcc -shared"
}
else
# find system name and corresponding cc options
CC
=
${
CC
-cc
}
case
`
(
uname
-sr
||
echo
unknown
)
2>/dev/null
`
in
SunOS
\
5
*
)
SFLAGS
=
${
CFLAGS
-
"-fast -xcg89 -KPIC -R."
}
CFLAGS
=
${
CFLAGS
-
"-fast -xcg89"
}
LDSHARED
=
${
LDSHARED
-
"cc -G"
}
;;
SunOS
\
4
*
)
SFLAGS
=
${
CFLAGS
-
"-O2 -PIC"
}
CFLAGS
=
${
CFLAGS
-
"-O2"
}
LDSHARED
=
${
LDSHARED
-
"ld"
}
;;
IRIX
*
)
SFLAGS
=
${
CFLAGS
-
"-O2 -rpath ."
}
CFLAGS
=
${
CFLAGS
-
"-O2"
}
LDSHARED
=
${
LDSHARED
-
"cc -shared"
}
;;
QNX
*
)
SFLAGS
=
${
CFLAGS
-
"-4 -O -Q"
}
CFLAGS
=
${
CFLAGS
-
"-4 -O -Q"
}
LDSHARED
=
${
LDSHARED
-
"cc"
}
LIBS
=
zlib.lib
AR
=
"cc -A"
;;
# send working options for other systems to gzip@prep.ai.mit.edu
*
)
SFLAGS
=
${
CFLAGS
-
"-O"
}
CFLAGS
=
${
CFLAGS
-
"-O"
}
LDSHARED
=
${
LDSHARED
-
"-shared"
}
;;
esac
fi
echo
Checking
for
shared library support...
# we must test in two steps (cc then ld), required at least on SunOS 4.x
if
test
"
`
$CC
-c
$SFLAGS
$test
.c 2>&1
`
"
=
""
&&
test
"
`
$LDSHARED
-o
$test
.so
$test
.o 2>&1
`
"
=
""
;
then
CFLAGS
=
"
$SFLAGS
"
LIBS
=
'libz.so.$(VER)'
echo
Building shared library libz.so.
$VER
with
$CC
.
else
LDSHARED
=
"
$CC
"
echo
Building static library
$LIBS
version
$VER
with
$CC
.
fi
rm
-f
$test
.[co]
$test
.so
# udpate Makefile
# ed -s Makefile <<EOF
sed
< Makefile.in
"
/^CC *=/s/=.*/=
$CC
/
/^CFLAGS *=/s/=.*/=
$CFLAGS
/
/^LDSHARED *=/s/=.*/=
$LDSHARED
/
/^LIBS *=/s,=.*,=
$LIBS
,
/^AR *=/s/=.*/=
$AR
/
/^VER *=/s/=.*/=
$VER
/
/^prefix *=/s,=.*,=
$prefix
,
/^exec_prefix *=/s,=.*,=
$exec_prefix
,
"
>
Makefile
#w
#q
#EOF
crc32.c
浏览文件 @
56bcb184
/* crc32.c -- compute the CRC-32 of a data stream
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -10,23 +10,53 @@
#define local static
#ifdef DYNAMIC_CRC_TABLE
/* =========================================================================
* Make the crc table. This function is needed only if you want to compute
* the table dynamically.
*/
local
int
crc_table_empty
=
1
;
local
uLong
crc_table
[
256
];
local
uLongf
crc_table
[
256
];
local
void
make_crc_table
OF
((
void
));
/*
Generate a table for a byte-wise 32-bit CRC calculation on the polynomial:
x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
Polynomials over GF(2) are represented in binary, one bit per coefficient,
with the lowest powers in the most significant bit. Then adding polynomials
is just exclusive-or, and multiplying a polynomial by x is a right shift by
one. If we call the above polynomial p, and represent a byte as the
polynomial q, also with the lowest power in the most significant bit (so the
byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
where a mod b means the remainder after dividing a by b.
This calculation is done using the shift-register method of multiplying and
taking the remainder. The register is initialized to zero, and for each
incoming bit, x^32 is added mod p to the register if the bit is a one (where
x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
x (which is shifting right by one and adding x^32 mod p if the bit shifted
out is a one). We start with the highest power (least significant bit) of
q and repeat for all eight bits of q.
The table is simply the CRC of all possible eight bit values. This is all
the information needed to generate CRC's on data a byte at a time for all
combinations of CRC register values and incoming bytes.
*/
local
void
make_crc_table
()
{
uLong
c
;
int
n
,
k
;
uLong
poly
;
/* polynomial exclusive-or pattern */
/* terms of polynomial defining this crc (except x^32): */
static
Byte
p
[]
=
{
0
,
1
,
2
,
4
,
5
,
7
,
8
,
10
,
11
,
12
,
16
,
22
,
23
,
26
};
/* make exclusive-or pattern from polynomial (0xedb88320L) */
poly
=
0L
;
for
(
n
=
0
;
n
<
sizeof
(
p
)
/
sizeof
(
Byte
);
n
++
)
poly
|=
1L
<<
(
31
-
p
[
n
]);
for
(
n
=
0
;
n
<
256
;
n
++
)
{
c
=
(
uLong
)
n
;
for
(
k
=
0
;
k
<
8
;
k
++
)
c
=
c
&
1
?
0xedb88320L
^
(
c
>>
1
)
:
c
>>
1
;
c
=
c
&
1
?
poly
^
(
c
>>
1
)
:
c
>>
1
;
crc_table
[
n
]
=
c
;
}
crc_table_empty
=
0
;
...
...
@@ -35,7 +65,7 @@ local void make_crc_table()
/* ========================================================================
* Table of CRC-32's of all single-byte values (made by make_crc_table)
*/
local
uLong
crc_table
[
]
=
{
local
uLong
f
crc_table
[
256
]
=
{
0x00000000L
,
0x77073096L
,
0xee0e612cL
,
0x990951baL
,
0x076dc419L
,
0x706af48fL
,
0xe963a535L
,
0x9e6495a3L
,
0x0edb8832L
,
0x79dcb8a4L
,
0xe0d5e91eL
,
0x97d2d988L
,
0x09b64c2bL
,
0x7eb17cbdL
,
0xe7b82d07L
,
...
...
@@ -91,6 +121,18 @@ local uLong crc_table[] = {
};
#endif
/* =========================================================================
* This function can be used by asm versions of crc32()
*/
uLongf
*
get_crc_table
()
{
#ifdef DYNAMIC_CRC_TABLE
if
(
crc_table_empty
)
make_crc_table
();
#endif
return
(
uLongf
*
)
crc_table
;
}
/* ========================================================================= */
#define DO1(buf) crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8);
#define DO2(buf) DO1(buf); DO1(buf);
#define DO4(buf) DO2(buf); DO2(buf);
...
...
@@ -99,7 +141,7 @@ local uLong crc_table[] = {
/* ========================================================================= */
uLong
crc32
(
crc
,
buf
,
len
)
uLong
crc
;
Bytef
*
buf
;
const
Bytef
*
buf
;
uInt
len
;
{
if
(
buf
==
Z_NULL
)
return
0L
;
...
...
deflate.c
浏览文件 @
56bcb184
此差异已折叠。
点击以展开。
deflate.h
浏览文件 @
56bcb184
/* deflate.h -- internal compression state
* Copyright (C) 1995 Jean-loup Gailly
* Copyright (C) 1995
-1996
Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -10,17 +10,15 @@
/* $Id: deflate.h,v 1.5 1995/05/03 17:27:09 jloup Exp $ */
#ifndef _DEFLATE_H
#define _DEFLATE_H
#include "zutil.h"
/* ===========================================================================
* Internal compression state.
*/
/* Data type */
#define BINARY 0
#define ASCII 1
#define UNKNOWN 2
#define LENGTH_CODES 29
/* number of length codes, not counting the special END_BLOCK code */
...
...
@@ -87,10 +85,10 @@ typedef struct internal_state {
Bytef
*
pending_buf
;
/* output still pending */
Bytef
*
pending_out
;
/* next pending byte to output to the stream */
int
pending
;
/* nb of bytes in the pending buffer */
uLong
adler
;
/* adler32 of uncompressed data */
int
noheader
;
/* suppress zlib header and adler32 */
Byte
data_type
;
/* UNKNOWN, BINARY or ASCII */
Byte
method
;
/* STORED (for zip only) or DEFLATED */
int
last_flush
;
/* value of flush param for previous deflate call */
/* used by deflate.c: */
...
...
@@ -173,7 +171,7 @@ typedef struct internal_state {
uInt
good_match
;
/* Use a faster search when the previous match is longer than this */
int
nice_match
;
/* Stop searching when current match exceeds this */
int
nice_match
;
/* Stop searching when current match exceeds this */
/* used by trees.c: */
/* Didn't use ct_data typedef below to supress compiler warning */
...
...
@@ -267,9 +265,11 @@ typedef struct internal_state {
*/
/* in trees.c */
void
ct_init
OF
((
deflate_state
*
s
));
int
ct_tally
OF
((
deflate_state
*
s
,
int
dist
,
int
lc
));
ulg
ct_flush_block
OF
((
deflate_state
*
s
,
charf
*
buf
,
ulg
stored_len
,
int
eof
));
void
ct_align
OF
((
deflate_state
*
s
));
void
ct_stored_block
OF
((
deflate_state
*
s
,
charf
*
buf
,
ulg
stored_len
,
void
_tr_init
OF
((
deflate_state
*
s
));
int
_tr_tally
OF
((
deflate_state
*
s
,
unsigned
dist
,
unsigned
lc
));
ulg
_tr_flush_block
OF
((
deflate_state
*
s
,
charf
*
buf
,
ulg
stored_len
,
int
eof
));
void
_tr_align
OF
((
deflate_state
*
s
));
void
_tr_stored_block
OF
((
deflate_state
*
s
,
charf
*
buf
,
ulg
stored_len
,
int
eof
));
#endif
example.c
浏览文件 @
56bcb184
/* example.c -- usage example of the zlib compression library
* Copyright (C) 1995 Jean-loup Gailly.
* Copyright (C) 1995
-1996
Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -10,20 +10,11 @@
#ifdef STDC
# include <string.h>
# include <stdlib.h>
#else
extern
void
exit
OF
((
int
));
#endif
#ifndef __GO32__
extern
void
exit
OF
((
int
));
#endif
#define BUFLEN 4096
#define local static
/* For MSDOS and other systems with limitation on stack size. For Unix,
#define local
works also.
*/
#define CHECK_ERR(err, msg) { \
if (err != Z_OK) { \
fprintf(stderr, "%s error: %d\n", msg, err); \
...
...
@@ -31,32 +22,44 @@ extern void exit OF((int));
} \
}
c
har
*
hello
=
"hello, hello!"
;
c
onst
char
hello
[]
=
"hello, hello!"
;
/* "hello world" would be more standard, but the repeated "hello"
* stresses the compression code better, sorry...
*/
void
test_compress
OF
((
void
));
void
test_gzio
OF
((
char
*
out
,
char
*
in
));
void
test_deflate
OF
((
Byte
compr
[]));
void
test_inflate
OF
((
Byte
compr
[]));
void
test_flush
OF
((
Byte
compr
[]));
void
test_sync
OF
((
Byte
compr
[]));
int
main
OF
((
int
argc
,
char
*
argv
[]));
const
char
dictionary
[]
=
"hello"
;
uLong
dictId
;
/* Adler32 value of the dictionary */
void
test_compress
OF
((
Bytef
*
compr
,
uLong
comprLen
,
Bytef
*
uncompr
,
uLong
uncomprLen
));
void
test_gzio
OF
((
const
char
*
out
,
const
char
*
in
,
Bytef
*
uncompr
,
int
uncomprLen
));
void
test_deflate
OF
((
Bytef
*
compr
,
uLong
comprLen
));
void
test_inflate
OF
((
Bytef
*
compr
,
uLong
comprLen
,
Bytef
*
uncompr
,
uLong
uncomprLen
));
void
test_large_deflate
OF
((
Bytef
*
compr
,
uLong
comprLen
,
Bytef
*
uncompr
,
uLong
uncomprLen
));
void
test_large_inflate
OF
((
Bytef
*
compr
,
uLong
comprLen
,
Bytef
*
uncompr
,
uLong
uncomprLen
));
void
test_flush
OF
((
Bytef
*
compr
,
uLong
comprLen
));
void
test_sync
OF
((
Bytef
*
compr
,
uLong
comprLen
,
Bytef
*
uncompr
,
uLong
uncomprLen
));
void
test_dict_deflate
OF
((
Bytef
*
compr
,
uLong
comprLen
));
void
test_dict_inflate
OF
((
Bytef
*
compr
,
uLong
comprLen
,
Bytef
*
uncompr
,
uLong
uncomprLen
));
int
main
OF
((
int
argc
,
char
*
argv
[]));
/* ===========================================================================
* Test compress() and uncompress()
*/
void
test_compress
()
void
test_compress
(
compr
,
comprLen
,
uncompr
,
uncomprLen
)
Bytef
*
compr
,
*
uncompr
;
uLong
comprLen
,
uncomprLen
;
{
local
Byte
compr
[
BUFLEN
];
uLong
comprLen
=
sizeof
(
compr
);
local
Byte
uncompr
[
BUFLEN
];
uLong
uncomprLen
=
sizeof
(
uncompr
);
int
err
;
uLong
len
=
strlen
(
hello
)
+
1
;
err
=
compress
(
compr
,
&
comprLen
,
(
Byte
*
)
hello
,
len
);
err
=
compress
(
compr
,
&
comprLen
,
(
const
Bytef
*
)
hello
,
len
);
CHECK_ERR
(
err
,
"compress"
);
strcpy
((
char
*
)
uncompr
,
"garbage"
);
...
...
@@ -74,12 +77,12 @@ void test_compress()
/* ===========================================================================
* Test read/write of .gz files
*/
void
test_gzio
(
out
,
in
)
char
*
out
;
/* output file */
char
*
in
;
/* input file */
void
test_gzio
(
out
,
in
,
uncompr
,
uncomprLen
)
const
char
*
out
;
/* output file */
const
char
*
in
;
/* input file */
Bytef
*
uncompr
;
int
uncomprLen
;
{
local
Byte
uncompr
[
BUFLEN
];
int
uncomprLen
=
sizeof
(
uncompr
);
int
err
;
int
len
=
strlen
(
hello
)
+
1
;
gzFile
file
;
...
...
@@ -90,7 +93,7 @@ void test_gzio(out, in)
exit
(
1
);
}
if
(
gzwrite
(
file
,
hello
,
len
)
!=
len
)
{
if
(
gzwrite
(
file
,
(
const
voidp
)
hello
,
(
unsigned
)
len
)
!=
len
)
{
fprintf
(
stderr
,
"gzwrite err: %s
\n
"
,
gzerror
(
file
,
&
err
));
}
gzclose
(
file
);
...
...
@@ -101,7 +104,7 @@ void test_gzio(out, in)
}
strcpy
((
char
*
)
uncompr
,
"garbage"
);
uncomprLen
=
gzread
(
file
,
uncompr
,
uncomprLen
);
uncomprLen
=
gzread
(
file
,
uncompr
,
(
unsigned
)
uncomprLen
);
if
(
uncomprLen
!=
len
)
{
fprintf
(
stderr
,
"gzread err: %s
\n
"
,
gzerror
(
file
,
&
err
));
}
...
...
@@ -117,8 +120,9 @@ void test_gzio(out, in)
/* ===========================================================================
* Test deflate() with small buffers
*/
void
test_deflate
(
compr
)
Byte
compr
[];
void
test_deflate
(
compr
,
comprLen
)
Bytef
*
compr
;
uLong
comprLen
;
{
z_stream
c_stream
;
/* compression stream */
int
err
;
...
...
@@ -126,14 +130,15 @@ void test_deflate(compr)
c_stream
.
zalloc
=
(
alloc_func
)
0
;
c_stream
.
zfree
=
(
free_func
)
0
;
c_stream
.
opaque
=
(
voidpf
)
0
;
err
=
deflateInit
(
&
c_stream
,
Z_DEFAULT_COMPRESSION
);
CHECK_ERR
(
err
,
"deflateInit"
);
c_stream
.
next_in
=
(
Byte
*
)
hello
;
c_stream
.
next_in
=
(
Byte
f
*
)
hello
;
c_stream
.
next_out
=
compr
;
while
(
c_stream
.
total_in
!=
(
uLong
)
len
)
{
while
(
c_stream
.
total_in
!=
(
uLong
)
len
&&
c_stream
.
total_out
<
comprLen
)
{
c_stream
.
avail_in
=
c_stream
.
avail_out
=
1
;
/* force small buffers */
err
=
deflate
(
&
c_stream
,
Z_NO_FLUSH
);
CHECK_ERR
(
err
,
"deflate"
);
...
...
@@ -153,10 +158,10 @@ void test_deflate(compr)
/* ===========================================================================
* Test inflate() with small buffers
*/
void
test_inflate
(
compr
)
Byte
compr
[];
void
test_inflate
(
compr
,
comprLen
,
uncompr
,
uncomprLen
)
Bytef
*
compr
,
*
uncompr
;
uLong
comprLen
,
uncomprLen
;
{
local
Byte
uncompr
[
BUFLEN
];
int
err
;
z_stream
d_stream
;
/* decompression stream */
...
...
@@ -164,6 +169,7 @@ void test_inflate(compr)
d_stream
.
zalloc
=
(
alloc_func
)
0
;
d_stream
.
zfree
=
(
free_func
)
0
;
d_stream
.
opaque
=
(
voidpf
)
0
;
err
=
inflateInit
(
&
d_stream
);
CHECK_ERR
(
err
,
"inflateInit"
);
...
...
@@ -171,7 +177,7 @@ void test_inflate(compr)
d_stream
.
next_in
=
compr
;
d_stream
.
next_out
=
uncompr
;
for
(;;
)
{
while
(
d_stream
.
total_out
<
uncomprLen
&&
d_stream
.
total_in
<
comprLen
)
{
d_stream
.
avail_in
=
d_stream
.
avail_out
=
1
;
/* force small buffers */
err
=
inflate
(
&
d_stream
,
Z_NO_FLUSH
);
if
(
err
==
Z_STREAM_END
)
break
;
...
...
@@ -188,11 +194,105 @@ void test_inflate(compr)
}
}
/* ===========================================================================
* Test deflate() with large buffers and dynamic change of compression level
*/
void
test_large_deflate
(
compr
,
comprLen
,
uncompr
,
uncomprLen
)
Bytef
*
compr
,
*
uncompr
;
uLong
comprLen
,
uncomprLen
;
{
z_stream
c_stream
;
/* compression stream */
int
err
;
c_stream
.
zalloc
=
(
alloc_func
)
0
;
c_stream
.
zfree
=
(
free_func
)
0
;
c_stream
.
opaque
=
(
voidpf
)
0
;
err
=
deflateInit
(
&
c_stream
,
Z_BEST_SPEED
);
CHECK_ERR
(
err
,
"deflateInit"
);
c_stream
.
next_out
=
compr
;
c_stream
.
avail_out
=
(
uInt
)
comprLen
;
/* At this point, uncompr is still mostly zeroes, so it should compress
* very well:
*/
c_stream
.
next_in
=
uncompr
;
c_stream
.
avail_in
=
(
uInt
)
uncomprLen
;
err
=
deflate
(
&
c_stream
,
Z_NO_FLUSH
);
CHECK_ERR
(
err
,
"deflate"
);
if
(
c_stream
.
avail_in
!=
0
)
{
fprintf
(
stderr
,
"deflate not greedy
\n
"
);
}
/* Feed in already compressed data and switch to no compression: */
deflateParams
(
&
c_stream
,
Z_NO_COMPRESSION
,
Z_DEFAULT_STRATEGY
);
c_stream
.
next_in
=
compr
;
c_stream
.
avail_in
=
(
uInt
)
comprLen
/
2
;
err
=
deflate
(
&
c_stream
,
Z_NO_FLUSH
);
CHECK_ERR
(
err
,
"deflate"
);
/* Switch back to compressing mode: */
deflateParams
(
&
c_stream
,
Z_BEST_COMPRESSION
,
Z_FILTERED
);
c_stream
.
next_in
=
uncompr
;
c_stream
.
avail_in
=
(
uInt
)
uncomprLen
;
err
=
deflate
(
&
c_stream
,
Z_NO_FLUSH
);
CHECK_ERR
(
err
,
"deflate"
);
err
=
deflate
(
&
c_stream
,
Z_FINISH
);
if
(
err
!=
Z_STREAM_END
)
{
fprintf
(
stderr
,
"deflate should report Z_STREAM_END
\n
"
);
}
err
=
deflateEnd
(
&
c_stream
);
CHECK_ERR
(
err
,
"deflateEnd"
);
}
/* ===========================================================================
* Test inflate() with large buffers
*/
void
test_large_inflate
(
compr
,
comprLen
,
uncompr
,
uncomprLen
)
Bytef
*
compr
,
*
uncompr
;
uLong
comprLen
,
uncomprLen
;
{
int
err
;
z_stream
d_stream
;
/* decompression stream */
strcpy
((
char
*
)
uncompr
,
"garbage"
);
d_stream
.
zalloc
=
(
alloc_func
)
0
;
d_stream
.
zfree
=
(
free_func
)
0
;
d_stream
.
opaque
=
(
voidpf
)
0
;
err
=
inflateInit
(
&
d_stream
);
CHECK_ERR
(
err
,
"inflateInit"
);
d_stream
.
next_in
=
compr
;
d_stream
.
avail_in
=
(
uInt
)
comprLen
;
for
(;;)
{
d_stream
.
next_out
=
uncompr
;
/* discard the output */
d_stream
.
avail_out
=
(
uInt
)
uncomprLen
;
err
=
inflate
(
&
d_stream
,
Z_NO_FLUSH
);
if
(
err
==
Z_STREAM_END
)
break
;
CHECK_ERR
(
err
,
"large inflate"
);
}
err
=
inflateEnd
(
&
d_stream
);
CHECK_ERR
(
err
,
"inflateEnd"
);
if
(
d_stream
.
total_out
!=
2
*
uncomprLen
+
comprLen
/
2
)
{
fprintf
(
stderr
,
"bad large inflate: %ld
\n
"
,
d_stream
.
total_out
);
}
else
{
printf
(
"large_inflate(): OK
\n
"
);
}
}
/* ===========================================================================
* Test deflate() with full flush
*/
void
test_flush
(
compr
)
Byte
compr
[];
void
test_flush
(
compr
,
comprLen
)
Bytef
*
compr
;
uLong
comprLen
;
{
z_stream
c_stream
;
/* compression stream */
int
err
;
...
...
@@ -200,14 +300,15 @@ void test_flush(compr)
c_stream
.
zalloc
=
(
alloc_func
)
0
;
c_stream
.
zfree
=
(
free_func
)
0
;
c_stream
.
opaque
=
(
voidpf
)
0
;
err
=
deflateInit
(
&
c_stream
,
Z_DEFAULT_COMPRESSION
);
CHECK_ERR
(
err
,
"deflateInit"
);
c_stream
.
next_in
=
(
Byte
*
)
hello
;
c_stream
.
next_in
=
(
Byte
f
*
)
hello
;
c_stream
.
next_out
=
compr
;
c_stream
.
avail_in
=
3
;
c_stream
.
avail_out
=
BUFLEN
;
c_stream
.
avail_out
=
(
uInt
)
comprLen
;
err
=
deflate
(
&
c_stream
,
Z_FULL_FLUSH
);
CHECK_ERR
(
err
,
"deflate"
);
...
...
@@ -225,10 +326,10 @@ void test_flush(compr)
/* ===========================================================================
* Test inflateSync()
*/
void
test_sync
(
compr
)
Byte
compr
[];
void
test_sync
(
compr
,
comprLen
,
uncompr
,
uncomprLen
)
Bytef
*
compr
,
*
uncompr
;
uLong
comprLen
,
uncomprLen
;
{
local
Byte
uncompr
[
BUFLEN
];
int
err
;
z_stream
d_stream
;
/* decompression stream */
...
...
@@ -236,6 +337,7 @@ void test_sync(compr)
d_stream
.
zalloc
=
(
alloc_func
)
0
;
d_stream
.
zfree
=
(
free_func
)
0
;
d_stream
.
opaque
=
(
voidpf
)
0
;
err
=
inflateInit
(
&
d_stream
);
CHECK_ERR
(
err
,
"inflateInit"
);
...
...
@@ -243,13 +345,13 @@ void test_sync(compr)
d_stream
.
next_in
=
compr
;
d_stream
.
next_out
=
uncompr
;
d_stream
.
avail_in
=
2
;
/* just read the zlib header */
d_stream
.
avail_out
=
sizeof
(
uncompr
)
;
d_stream
.
avail_out
=
(
uInt
)
uncomprLen
;
inflate
(
&
d_stream
,
Z_NO_FLUSH
);
CHECK_ERR
(
err
,
"inflate"
);
d_stream
.
avail_in
=
BUFLEN
-
2
;
/* let inflate
read all compressed data */
err
=
inflateSync
(
&
d_stream
);
/*
skip the damaged part */
d_stream
.
avail_in
=
(
uInt
)
comprLen
-
2
;
/*
read all compressed data */
err
=
inflateSync
(
&
d_stream
);
/* but
skip the damaged part */
CHECK_ERR
(
err
,
"inflateSync"
);
err
=
inflate
(
&
d_stream
,
Z_FINISH
);
...
...
@@ -263,6 +365,91 @@ void test_sync(compr)
printf
(
"after inflateSync(): hel%s
\n
"
,
uncompr
);
}
/* ===========================================================================
* Test deflate() with preset dictionary
*/
void
test_dict_deflate
(
compr
,
comprLen
)
Bytef
*
compr
;
uLong
comprLen
;
{
z_stream
c_stream
;
/* compression stream */
int
err
;
c_stream
.
zalloc
=
(
alloc_func
)
0
;
c_stream
.
zfree
=
(
free_func
)
0
;
c_stream
.
opaque
=
(
voidpf
)
0
;
err
=
deflateInit
(
&
c_stream
,
Z_BEST_COMPRESSION
);
CHECK_ERR
(
err
,
"deflateInit"
);
err
=
deflateSetDictionary
(
&
c_stream
,
(
const
Bytef
*
)
dictionary
,
sizeof
(
dictionary
));
CHECK_ERR
(
err
,
"deflateSetDictionary"
);
dictId
=
c_stream
.
adler
;
c_stream
.
next_out
=
compr
;
c_stream
.
avail_out
=
(
uInt
)
comprLen
;
c_stream
.
next_in
=
(
Bytef
*
)
hello
;
c_stream
.
avail_in
=
(
uInt
)
strlen
(
hello
)
+
1
;
err
=
deflate
(
&
c_stream
,
Z_FINISH
);
if
(
err
!=
Z_STREAM_END
)
{
fprintf
(
stderr
,
"deflate should report Z_STREAM_END
\n
"
);
}
err
=
deflateEnd
(
&
c_stream
);
CHECK_ERR
(
err
,
"deflateEnd"
);
}
/* ===========================================================================
* Test inflate() with a preset dictionary
*/
void
test_dict_inflate
(
compr
,
comprLen
,
uncompr
,
uncomprLen
)
Bytef
*
compr
,
*
uncompr
;
uLong
comprLen
,
uncomprLen
;
{
int
err
;
z_stream
d_stream
;
/* decompression stream */
strcpy
((
char
*
)
uncompr
,
"garbage"
);
d_stream
.
zalloc
=
(
alloc_func
)
0
;
d_stream
.
zfree
=
(
free_func
)
0
;
d_stream
.
opaque
=
(
voidpf
)
0
;
err
=
inflateInit
(
&
d_stream
);
CHECK_ERR
(
err
,
"inflateInit"
);
d_stream
.
next_in
=
compr
;
d_stream
.
avail_in
=
(
uInt
)
comprLen
;
d_stream
.
next_out
=
uncompr
;
d_stream
.
avail_out
=
(
uInt
)
uncomprLen
;
for
(;;)
{
err
=
inflate
(
&
d_stream
,
Z_NO_FLUSH
);
if
(
err
==
Z_STREAM_END
)
break
;
if
(
err
==
Z_NEED_DICT
)
{
if
(
d_stream
.
adler
!=
dictId
)
{
fprintf
(
stderr
,
"unexpected dictionary"
);
exit
(
1
);
}
err
=
inflateSetDictionary
(
&
d_stream
,
(
const
Bytef
*
)
dictionary
,
sizeof
(
dictionary
));
}
CHECK_ERR
(
err
,
"inflate with dict"
);
}
err
=
inflateEnd
(
&
d_stream
);
CHECK_ERR
(
err
,
"inflateEnd"
);
if
(
strcmp
((
char
*
)
uncompr
,
hello
))
{
fprintf
(
stderr
,
"bad inflate with dict
\n
"
);
}
else
{
printf
(
"inflate with dictionary: %s
\n
"
,
uncompr
);
}
}
/* ===========================================================================
* Usage: example [output.gz [input.gz]]
*/
...
...
@@ -271,7 +458,9 @@ int main(argc, argv)
int
argc
;
char
*
argv
[];
{
local
Byte
compr
[
BUFLEN
];
Bytef
*
compr
,
*
uncompr
;
uLong
comprLen
=
32750
*
sizeof
(
int
);
/* don't overflow on MSDOS */
uLong
uncomprLen
=
comprLen
;
if
(
zlib_version
[
0
]
!=
ZLIB_VERSION
[
0
])
{
fprintf
(
stderr
,
"incompatible zlib version
\n
"
);
...
...
@@ -280,16 +469,31 @@ int main(argc, argv)
}
else
if
(
strcmp
(
zlib_version
,
ZLIB_VERSION
)
!=
0
)
{
fprintf
(
stderr
,
"warning: different zlib version
\n
"
);
}
test_compress
();
compr
=
(
Bytef
*
)
malloc
((
uInt
)
comprLen
);
uncompr
=
(
Bytef
*
)
calloc
((
uInt
)
uncomprLen
,
1
);
/* must be cleared */
if
(
compr
==
Z_NULL
||
uncompr
==
Z_NULL
)
{
printf
(
"out of memory
\n
"
);
exit
(
1
);
}
test_compress
(
compr
,
comprLen
,
uncompr
,
uncomprLen
);
test_gzio
((
argc
>
1
?
argv
[
1
]
:
"foo.gz"
),
(
argc
>
2
?
argv
[
2
]
:
"foo.gz"
));
(
argc
>
2
?
argv
[
2
]
:
"foo.gz"
),
uncompr
,
(
int
)
uncomprLen
);
test_deflate
(
compr
,
comprLen
);
test_inflate
(
compr
,
comprLen
,
uncompr
,
uncomprLen
);
test_large_deflate
(
compr
,
comprLen
,
uncompr
,
uncomprLen
);
test_large_inflate
(
compr
,
comprLen
,
uncompr
,
uncomprLen
);
test_
deflate
(
compr
);
test_
inflate
(
compr
);
test_
flush
(
compr
,
comprLen
);
test_
sync
(
compr
,
comprLen
,
uncompr
,
uncomprLen
);
test_
flush
(
compr
);
test_
sync
(
compr
);
test_
dict_deflate
(
compr
,
comprLen
);
test_
dict_inflate
(
compr
,
comprLen
,
uncompr
,
uncomprLen
);
exit
(
0
);
return
0
;
/* to avoid warning */
...
...
gzio.c
浏览文件 @
56bcb184
/* gzio.c -- IO on .gz files
* Copyright (C) 1995 Jean-loup Gailly.
* Copyright (C) 1995
-1996
Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -16,8 +16,7 @@ struct internal_state {int dummy;}; /* for buggy compilers */
#define ALLOC(size) malloc(size)
#define TRYFREE(p) {if (p) free(p);}
#define GZ_MAGIC_1 0x1f
#define GZ_MAGIC_2 0x8b
static
int
gz_magic
[
2
]
=
{
0x1f
,
0x8b
};
/* gzip magic header */
/* gzip flag byte */
#define ASCII_FLAG 0x01
/* bit 0 set: file probably ascii text */
...
...
@@ -27,10 +26,6 @@ struct internal_state {int dummy;}; /* for buggy compilers */
#define COMMENT 0x10
/* bit 4 set: file comment present */
#define RESERVED 0xE0
/* bits 5..7: reserved */
#ifndef SEEK_CUR
# define SEEK_CUR 1
#endif
typedef
struct
gz_stream
{
z_stream
stream
;
int
z_err
;
/* error code for last stream operation */
...
...
@@ -46,44 +41,16 @@ typedef struct gz_stream {
}
gz_stream
;
local
int
destroy
OF
((
gz_stream
*
s
));
local
gzFile
gz_open
OF
((
char
*
path
,
char
*
mode
,
int
fd
));
local
void
putLong
OF
((
FILE
*
file
,
uLong
x
));
local
uLong
getLong
OF
((
Bytef
*
buf
));
/* ===========================================================================
* Cleanup then free the given gz_stream. Return a zlib error code.
*/
local
int
destroy
(
s
)
gz_stream
*
s
;
{
int
err
=
Z_OK
;
if
(
!
s
)
return
Z_STREAM_ERROR
;
TRYFREE
(
s
->
inbuf
);
TRYFREE
(
s
->
outbuf
);
TRYFREE
(
s
->
path
);
TRYFREE
(
s
->
msg
);
if
(
s
->
stream
.
state
!=
NULL
)
{
if
(
s
->
mode
==
'w'
)
{
err
=
deflateEnd
(
&
(
s
->
stream
));
}
else
if
(
s
->
mode
==
'r'
)
{
err
=
inflateEnd
(
&
(
s
->
stream
));
}
}
if
(
s
->
file
!=
NULL
&&
fclose
(
s
->
file
))
{
err
=
Z_ERRNO
;
}
if
(
s
->
z_err
<
0
)
err
=
s
->
z_err
;
TRYFREE
(
s
);
return
err
;
}
local
gzFile
gz_open
OF
((
const
char
*
path
,
const
char
*
mode
,
int
fd
));
local
int
get_byte
OF
((
gz_stream
*
s
));
local
void
check_header
OF
((
gz_stream
*
s
));
local
int
destroy
OF
((
gz_stream
*
s
));
local
void
putLong
OF
((
FILE
*
file
,
uLong
x
));
local
uLong
getLong
OF
((
gz_stream
*
s
));
/* ===========================================================================
Opens a gzip (.gz) file for reading or writing. The mode parameter
is as in fopen ("rb" or "wb"). The file is given either by file descritor
is as in fopen ("rb" or "wb"). The file is given either by file descri
p
tor
or path name (if fd == -1).
gz_open return NULL if the file could not be opened or if there was
insufficient memory to allocate the (de)compression state; errno
...
...
@@ -91,19 +58,25 @@ local int destroy (s)
zlib error is Z_MEM_ERROR).
*/
local
gzFile
gz_open
(
path
,
mode
,
fd
)
char
*
path
;
char
*
mode
;
c
onst
c
har
*
path
;
c
onst
c
har
*
mode
;
int
fd
;
{
int
err
;
int
level
=
Z_DEFAULT_COMPRESSION
;
/* compression level */
char
*
p
=
mode
;
gz_stream
*
s
=
(
gz_stream
*
)
ALLOC
(
sizeof
(
gz_stream
));
char
*
p
=
(
char
*
)
mode
;
gz_stream
*
s
;
char
fmode
[
80
];
/* copy of mode, without the compression level */
char
*
m
=
fmode
;
if
(
!
path
||
!
mode
)
return
Z_NULL
;
s
=
(
gz_stream
*
)
ALLOC
(
sizeof
(
gz_stream
));
if
(
!
s
)
return
Z_NULL
;
s
->
stream
.
zalloc
=
(
alloc_func
)
0
;
s
->
stream
.
zfree
=
(
free_func
)
0
;
s
->
stream
.
opaque
=
(
voidpf
)
0
;
s
->
stream
.
next_in
=
s
->
inbuf
=
Z_NULL
;
s
->
stream
.
next_out
=
s
->
outbuf
=
Z_NULL
;
s
->
stream
.
avail_in
=
s
->
stream
.
avail_out
=
0
;
...
...
@@ -123,14 +96,18 @@ local gzFile gz_open (path, mode, fd)
s
->
mode
=
'\0'
;
do
{
if
(
*
p
==
'r'
)
s
->
mode
=
'r'
;
if
(
*
p
==
'w'
)
s
->
mode
=
'w'
;
if
(
*
p
>=
'1'
&&
*
p
<=
'9'
)
level
=
*
p
-
'0'
;
}
while
(
*
p
++
);
if
(
*
p
==
'w'
||
*
p
==
'a'
)
s
->
mode
=
'w'
;
if
(
*
p
>=
'0'
&&
*
p
<=
'9'
)
{
level
=
*
p
-
'0'
;
}
else
{
*
m
++
=
*
p
;
/* copy the mode */
}
}
while
(
*
p
++
&&
m
!=
fmode
+
sizeof
(
fmode
));
if
(
s
->
mode
==
'\0'
)
return
destroy
(
s
),
(
gzFile
)
Z_NULL
;
if
(
s
->
mode
==
'w'
)
{
err
=
deflateInit2
(
&
(
s
->
stream
),
level
,
DEFLATED
,
-
MAX_WBITS
,
DEF_MEM_LEVEL
,
0
);
Z_
DEFLATED
,
-
MAX_WBITS
,
DEF_MEM_LEVEL
,
0
);
/* windowBits is passed < 0 to suppress zlib header */
s
->
stream
.
next_out
=
s
->
outbuf
=
(
Byte
*
)
ALLOC
(
Z_BUFSIZE
);
...
...
@@ -149,7 +126,7 @@ local gzFile gz_open (path, mode, fd)
s
->
stream
.
avail_out
=
Z_BUFSIZE
;
errno
=
0
;
s
->
file
=
fd
<
0
?
FOPEN
(
path
,
mode
)
:
fdopen
(
fd
,
mode
);
s
->
file
=
fd
<
0
?
FOPEN
(
path
,
fmode
)
:
(
FILE
*
)
fdopen
(
fd
,
f
mode
);
if
(
s
->
file
==
NULL
)
{
return
destroy
(
s
),
(
gzFile
)
Z_NULL
;
...
...
@@ -157,50 +134,10 @@ local gzFile gz_open (path, mode, fd)
if
(
s
->
mode
==
'w'
)
{
/* Write a very simple .gz header:
*/
fprintf
(
s
->
file
,
"%c%c%c%c%c%c%c%c%c%c"
,
GZ_MAGIC_1
,
GZ_MAGIC_2
,
DEFLATED
,
0
/*flags*/
,
0
,
0
,
0
,
0
/*time*/
,
0
/*xflags*/
,
OS_CODE
);
fprintf
(
s
->
file
,
"%c%c%c%c%c%c%c%c%c%c"
,
gz_magic
[
0
],
gz_magic
[
1
]
,
Z_
DEFLATED
,
0
/*flags*/
,
0
,
0
,
0
,
0
/*time*/
,
0
/*xflags*/
,
OS_CODE
);
}
else
{
/* Check and skip the header:
*/
Byte
c1
=
0
,
c2
=
0
;
Byte
method
=
0
;
Byte
flags
=
0
;
Byte
xflags
=
0
;
Byte
time
[
4
];
Byte
osCode
;
int
c
;
s
->
stream
.
avail_in
=
fread
(
s
->
inbuf
,
1
,
2
,
s
->
file
);
if
(
s
->
stream
.
avail_in
!=
2
||
s
->
inbuf
[
0
]
!=
GZ_MAGIC_1
||
s
->
inbuf
[
1
]
!=
GZ_MAGIC_2
)
{
s
->
transparent
=
1
;
return
(
gzFile
)
s
;
}
s
->
stream
.
avail_in
=
0
;
fscanf
(
s
->
file
,
"%c%c%4c%c%c"
,
&
method
,
&
flags
,
time
,
&
xflags
,
&
osCode
);
if
(
method
!=
DEFLATED
||
feof
(
s
->
file
)
||
(
flags
&
RESERVED
)
!=
0
)
{
s
->
z_err
=
Z_DATA_ERROR
;
return
(
gzFile
)
s
;
}
if
((
flags
&
EXTRA_FIELD
)
!=
0
)
{
/* skip the extra field */
long
len
;
fscanf
(
s
->
file
,
"%c%c"
,
&
c1
,
&
c2
);
len
=
c1
+
((
long
)
c2
<<
8
);
fseek
(
s
->
file
,
len
,
SEEK_CUR
);
}
if
((
flags
&
ORIG_NAME
)
!=
0
)
{
/* skip the original file name */
while
((
c
=
getc
(
s
->
file
))
!=
0
&&
c
!=
EOF
)
;
}
if
((
flags
&
COMMENT
)
!=
0
)
{
/* skip the .gz file comment */
while
((
c
=
getc
(
s
->
file
))
!=
0
&&
c
!=
EOF
)
;
}
if
((
flags
&
HEAD_CRC
)
!=
0
)
{
/* skip the header crc */
fscanf
(
s
->
file
,
"%c%c"
,
&
c1
,
&
c2
);
}
if
(
feof
(
s
->
file
))
{
s
->
z_err
=
Z_DATA_ERROR
;
}
check_header
(
s
);
/* skip the .gz header */
}
return
(
gzFile
)
s
;
}
...
...
@@ -209,25 +146,138 @@ local gzFile gz_open (path, mode, fd)
Opens a gzip (.gz) file for reading or writing.
*/
gzFile
gzopen
(
path
,
mode
)
char
*
path
;
char
*
mode
;
c
onst
c
har
*
path
;
c
onst
c
har
*
mode
;
{
return
gz_open
(
path
,
mode
,
-
1
);
}
/* ===========================================================================
Associate a gzFile with the file descriptor fd.
Associate a gzFile with the file descriptor fd. fd is not dup'ed here
to mimic the behavio(u)r of fdopen.
*/
gzFile
gzdopen
(
fd
,
mode
)
int
fd
;
char
*
mode
;
c
onst
c
har
*
mode
;
{
char
name
[
20
];
if
(
fd
<
0
)
return
(
gzFile
)
Z_NULL
;
sprintf
(
name
,
"<fd:%d>"
,
fd
);
/* for debugging */
return
gz_open
(
name
,
mode
,
fd
);
}
/* ===========================================================================
Read a byte from a gz_stream; update next_in and avail_in. Return EOF
for end of file.
IN assertion: the stream s has been sucessfully opened for reading.
*/
local
int
get_byte
(
s
)
gz_stream
*
s
;
{
if
(
s
->
z_eof
)
return
EOF
;
if
(
s
->
stream
.
avail_in
==
0
)
{
errno
=
0
;
s
->
stream
.
avail_in
=
fread
(
s
->
inbuf
,
1
,
Z_BUFSIZE
,
s
->
file
);
if
(
s
->
stream
.
avail_in
==
0
)
{
s
->
z_eof
=
1
;
if
(
ferror
(
s
->
file
))
s
->
z_err
=
Z_ERRNO
;
return
EOF
;
}
s
->
stream
.
next_in
=
s
->
inbuf
;
}
s
->
stream
.
avail_in
--
;
return
*
(
s
->
stream
.
next_in
)
++
;
}
/* ===========================================================================
Check the gzip header of a gz_stream opened for reading. Set the stream
mode to transparent if the gzip magic header is not present; set s->err
to Z_DATA_ERROR if the magic header is present but the rest of the header
is incorrect.
IN assertion: the stream s has already been created sucessfully;
s->stream.avail_in is zero for the first time, but may be non-zero
for concatenated .gz files.
*/
local
void
check_header
(
s
)
gz_stream
*
s
;
{
int
method
=
0
;
int
flags
=
0
;
uInt
len
;
int
c
;
/* Check the gzip magic header */
for
(
len
=
0
;
len
<
2
;
len
++
)
{
c
=
get_byte
(
s
);
if
(
c
!=
gz_magic
[
len
])
{
s
->
transparent
=
1
;
if
(
c
!=
EOF
)
s
->
stream
.
avail_in
++
,
s
->
stream
.
next_in
--
;
s
->
z_err
=
s
->
stream
.
avail_in
!=
0
?
Z_OK
:
Z_STREAM_END
;
return
;
}
}
method
=
get_byte
(
s
);
flags
=
get_byte
(
s
);
if
(
method
!=
Z_DEFLATED
||
(
flags
&
RESERVED
)
!=
0
)
{
s
->
z_err
=
Z_DATA_ERROR
;
return
;
}
/* Discard time, xflags and OS code: */
for
(
len
=
0
;
len
<
6
;
len
++
)
(
void
)
get_byte
(
s
);
if
((
flags
&
EXTRA_FIELD
)
!=
0
)
{
/* skip the extra field */
len
=
(
uInt
)
get_byte
(
s
);
len
+=
((
uInt
)
get_byte
(
s
))
<<
8
;
/* len is garbage if EOF but the loop below will quit anyway */
while
(
len
--
!=
0
&&
get_byte
(
s
)
!=
EOF
)
;
}
if
((
flags
&
ORIG_NAME
)
!=
0
)
{
/* skip the original file name */
while
((
c
=
get_byte
(
s
))
!=
0
&&
c
!=
EOF
)
;
}
if
((
flags
&
COMMENT
)
!=
0
)
{
/* skip the .gz file comment */
while
((
c
=
get_byte
(
s
))
!=
0
&&
c
!=
EOF
)
;
}
if
((
flags
&
HEAD_CRC
)
!=
0
)
{
/* skip the header crc */
for
(
len
=
0
;
len
<
2
;
len
++
)
(
void
)
get_byte
(
s
);
}
s
->
z_err
=
s
->
z_eof
?
Z_DATA_ERROR
:
Z_OK
;
}
/* ===========================================================================
* Cleanup then free the given gz_stream. Return a zlib error code.
Try freeing in the reverse order of allocations.
*/
local
int
destroy
(
s
)
gz_stream
*
s
;
{
int
err
=
Z_OK
;
if
(
!
s
)
return
Z_STREAM_ERROR
;
TRYFREE
(
s
->
msg
);
if
(
s
->
stream
.
state
!=
NULL
)
{
if
(
s
->
mode
==
'w'
)
{
err
=
deflateEnd
(
&
(
s
->
stream
));
}
else
if
(
s
->
mode
==
'r'
)
{
err
=
inflateEnd
(
&
(
s
->
stream
));
}
}
if
(
s
->
file
!=
NULL
&&
fclose
(
s
->
file
))
{
err
=
Z_ERRNO
;
}
if
(
s
->
z_err
<
0
)
err
=
s
->
z_err
;
TRYFREE
(
s
->
inbuf
);
TRYFREE
(
s
->
outbuf
);
TRYFREE
(
s
->
path
);
TRYFREE
(
s
);
return
err
;
}
/* ===========================================================================
Reads the given number of uncompressed bytes from the compressed file.
gzread returns the number of bytes actually read (0 for end of file).
...
...
@@ -238,52 +288,71 @@ int gzread (file, buf, len)
unsigned
len
;
{
gz_stream
*
s
=
(
gz_stream
*
)
file
;
Byte
*
start
=
buf
;
/* starting point for crc computation */
if
(
s
==
NULL
||
s
->
mode
!=
'r'
)
return
Z_STREAM_ERROR
;
if
(
s
->
transparent
)
{
int
n
=
0
;
Byte
*
b
=
(
Byte
*
)
buf
;
/* Copy the first two (non-magic) bytes if not done already */
while
(
s
->
stream
.
avail_in
>
0
&&
len
>
0
)
{
*
b
++
=
*
s
->
stream
.
next_in
++
;
s
->
stream
.
avail_in
--
;
len
--
;
n
++
;
}
if
(
len
==
0
)
return
n
;
return
n
+
fread
(
b
,
1
,
len
,
s
->
file
);
}
if
(
s
->
z_err
==
Z_DATA_ERROR
)
return
-
1
;
/* bad .gz file */
if
(
s
->
z_err
==
Z_STREAM_END
)
return
0
;
/* don't read crc as data */
if
(
s
->
z_err
==
Z_DATA_ERROR
||
s
->
z_err
==
Z_ERRNO
)
return
-
1
;
if
(
s
->
z_err
==
Z_STREAM_END
)
return
0
;
/* EOF */
s
->
stream
.
next_out
=
buf
;
s
->
stream
.
avail_out
=
len
;
while
(
s
->
stream
.
avail_out
!=
0
)
{
if
(
s
->
transparent
)
{
/* Copy first the lookahead bytes: */
uInt
n
=
s
->
stream
.
avail_in
;
if
(
n
>
s
->
stream
.
avail_out
)
n
=
s
->
stream
.
avail_out
;
if
(
n
>
0
)
{
zmemcpy
(
s
->
stream
.
next_out
,
s
->
stream
.
next_in
,
n
);
s
->
stream
.
next_out
+=
n
;
s
->
stream
.
next_in
+=
n
;
s
->
stream
.
avail_out
-=
n
;
s
->
stream
.
avail_in
-=
n
;
}
if
(
s
->
stream
.
avail_out
>
0
)
{
s
->
stream
.
avail_out
-=
fread
(
s
->
stream
.
next_out
,
1
,
s
->
stream
.
avail_out
,
s
->
file
);
}
return
(
int
)(
len
-
s
->
stream
.
avail_out
);
}
if
(
s
->
stream
.
avail_in
==
0
&&
!
s
->
z_eof
)
{
errno
=
0
;
s
->
stream
.
avail_in
=
fread
(
s
->
inbuf
,
1
,
Z_BUFSIZE
,
s
->
file
);
s
->
stream
.
avail_in
=
fread
(
s
->
inbuf
,
1
,
Z_BUFSIZE
,
s
->
file
);
if
(
s
->
stream
.
avail_in
==
0
)
{
s
->
z_eof
=
1
;
}
else
if
(
s
->
stream
.
avail_in
==
(
uInt
)
EOF
)
{
s
->
stream
.
avail_in
=
0
;
s
->
z_eof
=
1
;
s
->
z_err
=
Z_ERRNO
;
break
;
if
(
ferror
(
s
->
file
))
{
s
->
z_err
=
Z_ERRNO
;
break
;
}
}
s
->
stream
.
next_in
=
s
->
inbuf
;
}
s
->
z_err
=
inflate
(
&
(
s
->
stream
),
Z_NO_FLUSH
);
if
(
s
->
z_err
==
Z_STREAM_END
||
s
->
z_err
!=
Z_OK
||
s
->
z_eof
)
break
;
if
(
s
->
z_err
==
Z_STREAM_END
)
{
/* Check CRC and original size */
s
->
crc
=
crc32
(
s
->
crc
,
start
,
(
uInt
)(
s
->
stream
.
next_out
-
start
));
start
=
s
->
stream
.
next_out
;
if
(
getLong
(
s
)
!=
s
->
crc
||
getLong
(
s
)
!=
s
->
stream
.
total_out
)
{
s
->
z_err
=
Z_DATA_ERROR
;
}
else
{
/* Check for concatenated .gz files: */
check_header
(
s
);
if
(
s
->
z_err
==
Z_OK
)
{
inflateReset
(
&
(
s
->
stream
));
s
->
crc
=
crc32
(
0L
,
Z_NULL
,
0
);
}
}
}
if
(
s
->
z_err
!=
Z_OK
||
s
->
z_eof
)
break
;
}
len
-=
s
->
stream
.
avail_out
;
s
->
crc
=
crc32
(
s
->
crc
,
buf
,
len
);
return
(
int
)
len
;
s
->
crc
=
crc32
(
s
->
crc
,
start
,
(
uInt
)(
s
->
stream
.
next_out
-
start
))
;
return
(
int
)
(
len
-
s
->
stream
.
avail_out
)
;
}
/* ===========================================================================
...
...
@@ -292,7 +361,7 @@ int gzread (file, buf, len)
*/
int
gzwrite
(
file
,
buf
,
len
)
gzFile
file
;
voidp
buf
;
const
voidp
buf
;
unsigned
len
;
{
gz_stream
*
s
=
(
gz_stream
*
)
file
;
...
...
@@ -343,7 +412,7 @@ int gzflush (file, flush)
len
=
Z_BUFSIZE
-
s
->
stream
.
avail_out
;
if
(
len
!=
0
)
{
if
(
fwrite
(
s
->
outbuf
,
1
,
len
,
s
->
file
)
!=
len
)
{
if
(
(
uInt
)
fwrite
(
s
->
outbuf
,
1
,
len
,
s
->
file
)
!=
len
)
{
s
->
z_err
=
Z_ERRNO
;
return
Z_ERRNO
;
}
...
...
@@ -379,18 +448,19 @@ local void putLong (file, x)
}
/* ===========================================================================
Reads a long in LSB order from the given
buffer
Reads a long in LSB order from the given
gz_stream. Sets
*/
local
uLong
getLong
(
buf
)
Bytef
*
buf
;
local
uLong
getLong
(
s
)
gz_stream
*
s
;
{
uLong
x
=
0
;
Bytef
*
p
=
buf
+
4
;
do
{
x
<<=
8
;
x
|=
*--
p
;
}
while
(
p
!=
buf
);
uLong
x
=
(
uLong
)
get_byte
(
s
);
int
c
;
x
+=
((
uLong
)
get_byte
(
s
))
<<
8
;
x
+=
((
uLong
)
get_byte
(
s
))
<<
16
;
c
=
get_byte
(
s
);
if
(
c
==
EOF
)
s
->
z_err
=
Z_DATA_ERROR
;
x
+=
((
uLong
)
c
)
<<
24
;
return
x
;
}
...
...
@@ -401,7 +471,6 @@ local uLong getLong (buf)
int
gzclose
(
file
)
gzFile
file
;
{
uInt
n
;
int
err
;
gz_stream
*
s
=
(
gz_stream
*
)
file
;
...
...
@@ -414,25 +483,6 @@ int gzclose (file)
putLong
(
s
->
file
,
s
->
crc
);
putLong
(
s
->
file
,
s
->
stream
.
total_in
);
}
else
if
(
s
->
mode
==
'r'
&&
s
->
z_err
==
Z_STREAM_END
)
{
/* slide CRC and original size if they are at the end of inbuf */
if
((
n
=
s
->
stream
.
avail_in
)
<
8
&&
!
s
->
z_eof
)
{
Byte
*
p
=
s
->
inbuf
;
Bytef
*
q
=
s
->
stream
.
next_in
;
while
(
n
--
)
{
*
p
++
=
*
q
++
;
};
n
=
s
->
stream
.
avail_in
;
n
+=
fread
(
p
,
1
,
8
,
s
->
file
);
s
->
stream
.
next_in
=
s
->
inbuf
;
}
/* check CRC and original size */
if
(
n
<
8
||
getLong
(
s
->
stream
.
next_in
)
!=
s
->
crc
||
getLong
(
s
->
stream
.
next_in
+
4
)
!=
s
->
stream
.
total_out
)
{
s
->
z_err
=
Z_DATA_ERROR
;
}
}
return
destroy
(
file
);
}
...
...
@@ -453,14 +503,14 @@ char* gzerror (file, errnum)
if
(
s
==
NULL
)
{
*
errnum
=
Z_STREAM_ERROR
;
return
z_errmsg
[
1
-
Z_STREAM_ERROR
]
;
return
ERR_MSG
(
Z_STREAM_ERROR
)
;
}
*
errnum
=
s
->
z_err
;
if
(
*
errnum
==
Z_OK
)
return
""
;
if
(
*
errnum
==
Z_OK
)
return
(
char
*
)
""
;
m
=
*
errnum
==
Z_ERRNO
?
zstrerror
(
errno
)
:
s
->
stream
.
msg
;
m
=
(
char
*
)(
*
errnum
==
Z_ERRNO
?
zstrerror
(
errno
)
:
s
->
stream
.
msg
)
;
if
(
m
==
NULL
||
*
m
==
'\0'
)
m
=
z_errmsg
[
1
-
s
->
z_err
];
if
(
m
==
NULL
||
*
m
==
'\0'
)
m
=
(
char
*
)
z_errmsg
[
1
-
s
->
z_err
];
TRYFREE
(
s
->
msg
);
s
->
msg
=
(
char
*
)
ALLOC
(
strlen
(
s
->
path
)
+
strlen
(
m
)
+
3
);
...
...
infblock.c
浏览文件 @
56bcb184
/* infblock.c -- interpret and process block types to last block
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -81,7 +81,7 @@ uLongf *c;
s
->
bitb
=
0
;
s
->
read
=
s
->
write
=
s
->
window
;
if
(
s
->
checkfn
!=
Z_NULL
)
s
->
check
=
(
*
s
->
checkfn
)(
0L
,
Z_NULL
,
0
);
z
->
adler
=
s
->
check
=
(
*
s
->
checkfn
)(
0L
,
Z_NULL
,
0
);
Trace
((
stderr
,
"inflate: blocks reset
\n
"
));
}
...
...
@@ -172,17 +172,17 @@ int r;
case
3
:
/* illegal */
DUMPBITS
(
3
)
s
->
mode
=
BAD
;
z
->
msg
=
"invalid block type"
;
z
->
msg
=
(
char
*
)
"invalid block type"
;
r
=
Z_DATA_ERROR
;
LEAVE
}
break
;
case
LENS
:
NEEDBITS
(
32
)
if
(((
~
b
)
>>
16
)
!=
(
b
&
0xffff
))
if
(((
(
~
b
)
>>
16
)
&
0xffff
)
!=
(
b
&
0xffff
))
{
s
->
mode
=
BAD
;
z
->
msg
=
"invalid stored block lengths"
;
z
->
msg
=
(
char
*
)
"invalid stored block lengths"
;
r
=
Z_DATA_ERROR
;
LEAVE
}
...
...
@@ -215,7 +215,7 @@ int r;
if
((
t
&
0x1f
)
>
29
||
((
t
>>
5
)
&
0x1f
)
>
29
)
{
s
->
mode
=
BAD
;
z
->
msg
=
"too many length or distance symbols"
;
z
->
msg
=
(
char
*
)
"too many length or distance symbols"
;
r
=
Z_DATA_ERROR
;
LEAVE
}
...
...
@@ -285,7 +285,7 @@ int r;
(
c
==
16
&&
i
<
1
))
{
s
->
mode
=
BAD
;
z
->
msg
=
"invalid bit length repeat"
;
z
->
msg
=
(
char
*
)
"invalid bit length repeat"
;
r
=
Z_DATA_ERROR
;
LEAVE
}
...
...
@@ -383,3 +383,14 @@ uLongf *c;
Trace
((
stderr
,
"inflate: blocks freed
\n
"
));
return
Z_OK
;
}
void
inflate_set_dictionary
(
s
,
z
,
d
,
n
)
inflate_blocks_statef
*
s
;
z_stream
*
z
;
const
Bytef
*
d
;
uInt
n
;
{
zmemcpy
((
charf
*
)
s
->
window
,
d
,
n
);
s
->
read
=
s
->
write
=
s
->
window
+
n
;
}
infblock.h
浏览文件 @
56bcb184
/* infblock.h -- header to use infblock.c
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -30,3 +30,9 @@ extern int inflate_blocks_free OF((
inflate_blocks_statef
*
,
z_stream
*
,
uLongf
*
));
/* check value on output */
extern
void
inflate_set_dictionary
OF
((
inflate_blocks_statef
*
s
,
z_stream
*
z
,
const
Bytef
*
d
,
/* dictionary */
uInt
n
));
/* dictionary length */
infcodes.c
浏览文件 @
56bcb184
/* infcodes.c -- process literals and length/distance pairs
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -58,7 +58,8 @@ struct inflate_codes_state {
inflate_codes_statef
*
inflate_codes_new
(
bl
,
bd
,
tl
,
td
,
z
)
uInt
bl
,
bd
;
inflate_huft
*
tl
,
*
td
;
inflate_huft
*
tl
;
inflate_huft
*
td
;
/* need separate declaration for Borland C++ */
z_stream
*
z
;
{
inflate_codes_statef
*
c
;
...
...
@@ -152,7 +153,7 @@ int r;
break
;
}
c
->
mode
=
BADCODE
;
/* invalid code */
z
->
msg
=
"invalid literal/length code"
;
z
->
msg
=
(
char
*
)
"invalid literal/length code"
;
r
=
Z_DATA_ERROR
;
LEAVE
case
LENEXT
:
/* i: getting length extra (have base) */
...
...
@@ -184,7 +185,7 @@ int r;
break
;
}
c
->
mode
=
BADCODE
;
/* invalid code */
z
->
msg
=
"invalid distance code"
;
z
->
msg
=
(
char
*
)
"invalid distance code"
;
r
=
Z_DATA_ERROR
;
LEAVE
case
DISTEXT
:
/* i: getting distance extra */
...
...
@@ -202,7 +203,7 @@ int r;
#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
));
f
=
s
->
end
-
(
c
->
sub
.
copy
.
dist
-
(
uInt
)(
q
-
s
->
window
));
#endif
while
(
c
->
len
)
{
...
...
infcodes.h
浏览文件 @
56bcb184
/* infcodes.h -- header to use infcodes.c
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
inffast.c
浏览文件 @
56bcb184
/* inffast.c -- process literals and length/distance pairs fast
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -29,7 +29,8 @@ struct inflate_codes_state {int dummy;}; /* for buggy compilers */
int
inflate_fast
(
bl
,
bd
,
tl
,
td
,
s
,
z
)
uInt
bl
,
bd
;
inflate_huft
*
tl
,
*
td
;
inflate_huft
*
tl
;
inflate_huft
*
td
;
/* need separate declaration for Borland C++ */
inflate_blocks_statef
*
s
;
z_stream
*
z
;
{
...
...
@@ -102,7 +103,7 @@ z_stream *z;
}
else
/* else offset after destination */
{
e
=
d
-
(
q
-
s
->
window
);
/* bytes from offset to end */
e
=
d
-
(
uInt
)(
q
-
s
->
window
);
/* bytes from offset to end */
r
=
s
->
end
-
e
;
/* pointer to offset */
if
(
c
>
e
)
/* if source crosses, */
{
...
...
@@ -122,7 +123,7 @@ z_stream *z;
e
=
(
t
=
t
->
next
+
((
uInt
)
b
&
inflate_mask
[
e
]))
->
exop
;
else
{
z
->
msg
=
"invalid distance code"
;
z
->
msg
=
(
char
*
)
"invalid distance code"
;
UNGRAB
UPDATE
return
Z_DATA_ERROR
;
...
...
@@ -152,7 +153,7 @@ z_stream *z;
}
else
{
z
->
msg
=
"invalid literal/length code"
;
z
->
msg
=
(
char
*
)
"invalid literal/length code"
;
UNGRAB
UPDATE
return
Z_DATA_ERROR
;
...
...
inffast.h
浏览文件 @
56bcb184
/* inffast.h -- header to use inffast.c
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
inflate.c
浏览文件 @
56bcb184
/* inflate.c -- zlib interface to inflate modules
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -15,6 +15,11 @@ struct internal_state {
enum
{
METHOD
,
/* waiting for method byte */
FLAG
,
/* waiting for flag byte */
DICT4
,
/* four dictionary check bytes to go */
DICT3
,
/* three dictionary check bytes to go */
DICT2
,
/* two dictionary check bytes to go */
DICT1
,
/* one dictionary check byte to go */
DICT0
,
/* waiting for inflateSetDictionary */
BLOCKS
,
/* decompressing blocks */
CHECK4
,
/* four check bytes to go */
CHECK3
,
/* three check bytes to go */
...
...
@@ -75,14 +80,25 @@ z_stream *z;
}
int
inflateInit2
(
z
,
w
)
int
inflateInit2
_
(
z
,
w
,
version
,
stream_size
)
z_stream
*
z
;
int
w
;
const
char
*
version
;
int
stream_size
;
{
if
(
version
==
Z_NULL
||
version
[
0
]
!=
ZLIB_VERSION
[
0
]
||
stream_size
!=
sizeof
(
z_stream
))
return
Z_VERSION_ERROR
;
/* initialize state */
if
(
z
==
Z_NULL
)
return
Z_STREAM_ERROR
;
if
(
z
->
zalloc
==
Z_NULL
)
z
->
zalloc
=
zcalloc
;
z
->
msg
=
Z_NULL
;
if
(
z
->
zalloc
==
Z_NULL
)
{
z
->
zalloc
=
zcalloc
;
z
->
opaque
=
(
voidpf
)
0
;
}
if
(
z
->
zfree
==
Z_NULL
)
z
->
zfree
=
zcfree
;
if
((
z
->
state
=
(
struct
internal_state
FAR
*
)
ZALLOC
(
z
,
1
,
sizeof
(
struct
internal_state
)))
==
Z_NULL
)
...
...
@@ -107,7 +123,7 @@ int w;
/* create inflate_blocks state */
if
((
z
->
state
->
blocks
=
inflate_blocks_new
(
z
,
z
->
state
->
nowrap
?
Z_NULL
:
adler32
,
1
<<
w
))
inflate_blocks_new
(
z
,
z
->
state
->
nowrap
?
Z_NULL
:
adler32
,
(
uInt
)
1
<<
w
))
==
Z_NULL
)
{
inflateEnd
(
z
);
...
...
@@ -121,10 +137,12 @@ int w;
}
int
inflateInit
(
z
)
int
inflateInit
_
(
z
,
version
,
stream_size
)
z_stream
*
z
;
const
char
*
version
;
int
stream_size
;
{
return
inflateInit2
(
z
,
DEF_WBITS
);
return
inflateInit2
_
(
z
,
DEF_WBITS
,
version
,
stream_size
);
}
...
...
@@ -138,46 +156,68 @@ int f;
int
r
=
f
;
/* to avoid warning about unused f */
uInt
b
;
if
(
z
==
Z_NULL
||
z
->
next_in
==
Z_NULL
)
if
(
z
==
Z_NULL
||
z
->
state
==
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
)
if
(((
z
->
state
->
sub
.
method
=
NEXTBYTE
)
&
0xf
)
!=
Z_
DEFLATED
)
{
z
->
state
->
mode
=
BAD
;
z
->
msg
=
"unknown compression method"
;
z
->
msg
=
(
char
*
)
"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
->
msg
=
(
char
*
)
"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
;
}
b
=
NEXTBYTE
;
if
(((
z
->
state
->
sub
.
method
<<
8
)
+
b
)
%
31
)
{
z
->
state
->
mode
=
BAD
;
z
->
msg
=
"incorrect header check"
;
z
->
msg
=
(
char
*
)
"incorrect header check"
;
z
->
state
->
sub
.
marker
=
5
;
/* can't try inflateSync */
break
;
}
Trace
((
stderr
,
"inflate: zlib header ok
\n
"
));
z
->
state
->
mode
=
BLOCKS
;
if
(
!
(
b
&
PRESET_DICT
))
{
z
->
state
->
mode
=
BLOCKS
;
break
;
}
z
->
state
->
mode
=
DICT4
;
case
DICT4
:
NEEDBYTE
z
->
state
->
sub
.
check
.
need
=
(
uLong
)
NEXTBYTE
<<
24
;
z
->
state
->
mode
=
DICT3
;
case
DICT3
:
NEEDBYTE
z
->
state
->
sub
.
check
.
need
+=
(
uLong
)
NEXTBYTE
<<
16
;
z
->
state
->
mode
=
DICT2
;
case
DICT2
:
NEEDBYTE
z
->
state
->
sub
.
check
.
need
+=
(
uLong
)
NEXTBYTE
<<
8
;
z
->
state
->
mode
=
DICT1
;
case
DICT1
:
NEEDBYTE
z
->
state
->
sub
.
check
.
need
+=
(
uLong
)
NEXTBYTE
;
z
->
adler
=
z
->
state
->
sub
.
check
.
need
;
z
->
state
->
mode
=
DICT0
;
return
Z_NEED_DICT
;
case
DICT0
:
z
->
state
->
mode
=
BAD
;
z
->
msg
=
(
char
*
)
"need dictionary"
;
z
->
state
->
sub
.
marker
=
0
;
/* can try inflateSync */
return
Z_STREAM_ERROR
;
case
BLOCKS
:
r
=
inflate_blocks
(
z
->
state
->
blocks
,
z
,
r
);
if
(
r
==
Z_DATA_ERROR
)
...
...
@@ -215,7 +255,7 @@ int f;
if
(
z
->
state
->
sub
.
check
.
was
!=
z
->
state
->
sub
.
check
.
need
)
{
z
->
state
->
mode
=
BAD
;
z
->
msg
=
"incorrect data check"
;
z
->
msg
=
(
char
*
)
"incorrect data check"
;
z
->
state
->
sub
.
marker
=
5
;
/* can't try inflateSync */
break
;
}
...
...
@@ -231,6 +271,29 @@ int f;
}
int
inflateSetDictionary
(
z
,
dictionary
,
dictLength
)
z_stream
*
z
;
const
Bytef
*
dictionary
;
uInt
dictLength
;
{
uInt
length
=
dictLength
;
if
(
z
==
Z_NULL
||
z
->
state
==
Z_NULL
||
z
->
state
->
mode
!=
DICT0
)
return
Z_STREAM_ERROR
;
if
(
adler32
(
1L
,
dictionary
,
dictLength
)
!=
z
->
adler
)
return
Z_DATA_ERROR
;
z
->
adler
=
1L
;
if
(
length
>=
(
1
<<
z
->
state
->
wbits
))
{
length
=
(
1
<<
z
->
state
->
wbits
)
-
1
;
dictionary
+=
dictLength
-
length
;
}
inflate_set_dictionary
(
z
->
state
->
blocks
,
z
,
dictionary
,
length
);
z
->
state
->
mode
=
BLOCKS
;
return
Z_OK
;
}
int
inflateSync
(
z
)
z_stream
*
z
;
{
...
...
inftrees.c
浏览文件 @
56bcb184
/* inftrees.c -- generate Huffman trees for efficient decoding
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "inftrees.h"
char
inflate_copyright
[]
=
" inflate 1.0 Copyright 1995-1996 Mark Adler "
;
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
include such an acknowledgment, I would appreciate that you keep this
copyright string in the executable of your product.
*/
struct
internal_state
{
int
dummy
;};
/* for buggy compilers */
/* simplify the use of the inflate_huft type with some defines */
...
...
@@ -30,23 +37,19 @@ local voidpf falloc OF((
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) */
/* Tables for deflate from PKZIP's appnote.txt. */
local
uInt
cplens
[]
=
{
/* Copy lengths for literal codes 257..285 */
local
uInt
cplens
[
31
]
=
{
/* 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 */
local
uInt
cplext
[
31
]
=
{
/* 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 */
local
uInt
cpdist
[
30
]
=
{
/* 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 */
local
uInt
cpdext
[
30
]
=
{
/* 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
};
...
...
@@ -304,11 +307,11 @@ z_stream *z; /* for zfree function */
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"
;
z
->
msg
=
(
char
*
)
"oversubscribed dynamic bit lengths tree"
;
else
if
(
r
==
Z_BUF_ERROR
)
{
inflate_trees_free
(
*
tb
,
z
);
z
->
msg
=
"incomplete dynamic bit lengths tree"
;
z
->
msg
=
(
char
*
)
"incomplete dynamic bit lengths tree"
;
r
=
Z_DATA_ERROR
;
}
return
r
;
...
...
@@ -331,11 +334,11 @@ z_stream *z; /* for zfree function */
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"
;
z
->
msg
=
(
char
*
)
"oversubscribed literal/length tree"
;
else
if
(
r
==
Z_BUF_ERROR
)
{
inflate_trees_free
(
*
tl
,
z
);
z
->
msg
=
"incomplete literal/length tree"
;
z
->
msg
=
(
char
*
)
"incomplete literal/length tree"
;
r
=
Z_DATA_ERROR
;
}
return
r
;
...
...
@@ -345,14 +348,14 @@ z_stream *z; /* for zfree function */
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"
;
z
->
msg
=
(
char
*
)
"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"
;
z
->
msg
=
(
char
*
)
"incomplete literal/length tree"
;
r
=
Z_DATA_ERROR
;
}
inflate_trees_free
(
*
tl
,
z
);
...
...
@@ -366,10 +369,8 @@ z_stream *z; /* for zfree function */
/* 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
;
...
...
@@ -378,24 +379,14 @@ local inflate_huft *fixed_td;
local
voidpf
falloc
(
q
,
n
,
s
)
voidpf
q
;
/* opaque pointer (not used)
*/
voidpf
q
;
/* opaque pointer
*/
uInt
n
;
/* number of items */
uInt
s
;
/* size of item */
{
Assert
(
s
==
sizeof
(
inflate_huft
)
&&
n
<=
fixed_left
,
Assert
(
s
==
sizeof
(
inflate_huft
)
&&
n
<=
*
(
intf
*
)
q
,
"inflate_trees falloc overflow"
);
if
(
q
)
s
++
;
/* to make some compilers happy */
fixed_left
-=
n
;
return
(
voidpf
)(
fixed_mem
+
fixed_left
);
}
local
void
ffree
(
q
,
p
)
voidpf
q
;
voidpf
p
;
{
Assert
(
0
,
"inflate_trees ffree called!"
);
if
(
q
)
q
=
p
;
/* to make some compilers happy */
*
(
intf
*
)
q
-=
n
+
s
-
s
;
/* s-s to avoid warning */
return
(
voidpf
)(
fixed_mem
+
*
(
intf
*
)
q
);
}
...
...
@@ -405,19 +396,18 @@ 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
--
;
/* build fixed tables if not already (multiple overlapped executions ok) */
if
(
!
fixed_built
)
{
int
k
;
/* temporary variable */
unsigned
c
[
288
];
/* length list for huft_build */
z_stream
z
;
/* for falloc function */
int
f
=
FIXEDH
;
/* number of hufts left in fixed_mem */
/* set up fake z_stream for memory routines */
z
.
zalloc
=
falloc
;
z
.
zfree
=
ffree
;
z
.
opaque
=
Z_NULL
;
z
.
zfree
=
Z_NULL
;
z
.
opaque
=
(
voidpf
)
&
f
;
/* literal table */
for
(
k
=
0
;
k
<
144
;
k
++
)
...
...
@@ -438,9 +428,9 @@ inflate_huft * FAR *td; /* distance tree result */
huft_build
(
c
,
30
,
0
,
cpdist
,
cpdext
,
&
fixed_td
,
&
fixed_bd
,
&
z
);
/* done */
Assert
(
f
==
0
,
"invalid build of fixed tables"
);
fixed_built
=
1
;
}
fixed_lock
--
;
*
bl
=
fixed_bl
;
*
bd
=
fixed_bd
;
*
tl
=
fixed_tl
;
...
...
@@ -456,10 +446,19 @@ z_stream *z; /* for zfree function */
list of the tables it made, with the links in a dummy first entry of
each table. */
{
register
inflate_huft
*
p
,
*
q
;
register
inflate_huft
*
p
,
*
q
,
*
r
;
/* Reverse linked list */
p
=
Z_NULL
;
q
=
t
;
while
(
q
!=
Z_NULL
)
{
r
=
(
q
-
1
)
->
next
;
(
q
-
1
)
->
next
=
p
;
p
=
q
;
q
=
r
;
}
/* Go through linked list, freeing from the malloced (t[-1]) address. */
p
=
t
;
while
(
p
!=
Z_NULL
)
{
q
=
(
--
p
)
->
next
;
...
...
inftrees.h
浏览文件 @
56bcb184
/* inftrees.h -- header to use inftrees.c
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
infutil.c
浏览文件 @
56bcb184
/* inflate_util.c -- data and routines common to blocks and codes
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -12,7 +12,7 @@
struct
inflate_codes_state
{
int
dummy
;};
/* for buggy compilers */
/* And'ing with mask[n] masks the lower n bits */
uInt
inflate_mask
[]
=
{
uInt
inflate_mask
[
17
]
=
{
0x0000
,
0x0001
,
0x0003
,
0x0007
,
0x000f
,
0x001f
,
0x003f
,
0x007f
,
0x00ff
,
0x01ff
,
0x03ff
,
0x07ff
,
0x0fff
,
0x1fff
,
0x3fff
,
0x7fff
,
0xffff
...
...
@@ -43,7 +43,7 @@ int r;
/* update check information */
if
(
s
->
checkfn
!=
Z_NULL
)
s
->
check
=
(
*
s
->
checkfn
)(
s
->
check
,
q
,
n
);
z
->
adler
=
s
->
check
=
(
*
s
->
checkfn
)(
s
->
check
,
q
,
n
);
/* copy as far as end of window */
zmemcpy
(
p
,
q
,
n
);
...
...
@@ -69,7 +69,7 @@ int r;
/* update check information */
if
(
s
->
checkfn
!=
Z_NULL
)
s
->
check
=
(
*
s
->
checkfn
)(
s
->
check
,
q
,
n
);
z
->
adler
=
s
->
check
=
(
*
s
->
checkfn
)(
s
->
check
,
q
,
n
);
/* copy */
zmemcpy
(
p
,
q
,
n
);
...
...
infutil.h
浏览文件 @
56bcb184
/* infutil.h -- types and macros common to blocks and codes
* Copyright (C) 1995 Mark Adler
* Copyright (C) 1995
-1996
Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -8,11 +8,10 @@
subject to change. Applications should only use zlib.h.
*/
/* inflate blocks semi-private state */
struct
inflate_blocks_state
{
#ifndef _INFUTIL_H
#define _INFUTIL_H
/* mode */
enum
{
typedef
enum
{
TYPE
,
/* get type bits (3, including end bit) */
LENS
,
/* get lengths for stored */
STORED
,
/* processing stored block */
...
...
@@ -23,7 +22,13 @@ struct inflate_blocks_state {
DRY
,
/* output remaining window bytes */
DONE
,
/* finished last block, done */
BAD
}
/* got a data error--stuck here */
mode
;
/* current inflate_block mode */
inflate_block_mode
;
/* inflate blocks semi-private state */
struct
inflate_blocks_state
{
/* mode */
inflate_block_mode
mode
;
/* current inflate_block mode */
/* mode dependent information */
union
{
...
...
@@ -70,17 +75,17 @@ struct inflate_blocks_state {
#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 WAVAIL (
uInt)(
q<s->read?s->read-q-1:s->end-q)
#define LOADOUT {q=s->write;m=
(uInt)
WAVAIL;}
#define WRAP {if(q==s->end&&s->read!=s->window){q=s->window;m=
(uInt)
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}
/* masks for lower bits */
extern
uInt
inflate_mask
[];
/* masks for lower bits
(size given to avoid silly warnings with Visual C++)
*/
extern
uInt
inflate_mask
[
17
];
/* copy as much as possible from the sliding window to the output area */
extern
int
inflate_flush
OF
((
...
...
@@ -89,3 +94,5 @@ extern int inflate_flush OF((
int
));
struct
internal_state
{
int
dummy
;};
/* for buggy compilers */
#endif
minigzip.c
浏览文件 @
56bcb184
/* minigzip.c -- simulate gzip using the zlib compression library
* Copyright (C) 1995 Jean-loup Gailly.
* Copyright (C) 1995
-1996
Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -18,14 +18,13 @@
#include <stdio.h>
#include "zlib.h"
#ifndef __GO32__
extern
void
exit
OF
((
int
));
#endif
extern
int
unlink
OF
((
const
char
*
));
#ifdef STDC
# include <string.h>
# include <stdlib.h>
#else
extern
void
exit
OF
((
int
));
#endif
extern
int
unlink
OF
((
const
char
*
));
#if defined(MSDOS) || defined(OS2) || defined(WIN32)
# include <fcntl.h>
...
...
@@ -53,7 +52,7 @@ extern int unlink OF((const char *));
char
*
prog
;
void
error
OF
((
char
*
msg
));
void
error
OF
((
c
onst
c
har
*
msg
));
void
gz_compress
OF
((
FILE
*
in
,
gzFile
out
));
void
gz_uncompress
OF
((
gzFile
in
,
FILE
*
out
));
void
file_compress
OF
((
char
*
file
));
...
...
@@ -64,7 +63,7 @@ int main OF((int argc, char *argv[]));
* Display error message and exit
*/
void
error
(
msg
)
char
*
msg
;
c
onst
c
har
*
msg
;
{
fprintf
(
stderr
,
"%s: %s
\n
"
,
prog
,
msg
);
exit
(
1
);
...
...
@@ -89,7 +88,7 @@ void gz_compress(in, out)
}
if
(
len
==
0
)
break
;
if
(
gzwrite
(
out
,
buf
,
len
)
!=
len
)
error
(
gzerror
(
out
,
&
err
));
if
(
gzwrite
(
out
,
buf
,
(
unsigned
)
len
)
!=
len
)
error
(
gzerror
(
out
,
&
err
));
}
fclose
(
in
);
if
(
gzclose
(
out
)
!=
Z_OK
)
error
(
"failed gzclose"
);
...
...
@@ -111,7 +110,9 @@ void gz_uncompress(in, out)
if
(
len
<
0
)
error
(
gzerror
(
in
,
&
err
));
if
(
len
==
0
)
break
;
if
(
fwrite
(
buf
,
1
,
len
,
out
)
!=
(
uInt
)
len
)
error
(
"failed fwrite"
);
if
((
int
)
fwrite
(
buf
,
1
,
(
unsigned
)
len
,
out
)
!=
len
)
{
error
(
"failed fwrite"
);
}
}
if
(
fclose
(
out
))
error
(
"failed fclose"
);
...
...
trees.c
浏览文件 @
56bcb184
/* trees.c -- output deflated data using Huffman coding
* Copyright (C) 1995 Jean-loup Gailly
* Copyright (C) 1995
-1996
Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -78,13 +78,12 @@ local uch bl_order[BL_CODES]
/* ===========================================================================
* Local data. These are initialized only once.
* To do: initialize at compile time to be completely reentrant. ???
*/
local
ct_data
static_ltree
[
L_CODES
+
2
];
/* The static literal tree. Since the bit lengths are imposed, there is no
* need for the L_CODES extra codes used during heap construction. However
* The codes 286 and 287 are needed to build a canonical tree (see
ct
_init
* The codes 286 and 287 are needed to build a canonical tree (see
_tr
_init
* below).
*/
...
...
@@ -129,7 +128,7 @@ local static_tree_desc static_bl_desc =
* Local (static) routines in this file.
*/
local
void
ct
_static_init
OF
((
void
));
local
void
tr
_static_init
OF
((
void
));
local
void
init_block
OF
((
deflate_state
*
s
));
local
void
pqdownheap
OF
((
deflate_state
*
s
,
ct_data
*
tree
,
int
k
));
local
void
gen_bitlen
OF
((
deflate_state
*
s
,
tree_desc
*
desc
));
...
...
@@ -187,7 +186,7 @@ local void send_bits(s, value, length)
int
value
;
/* value to send */
int
length
;
/* number of bits */
{
Tracev
((
stderr
,
" l %2d v %4x "
,
length
,
value
));
Tracev
v
((
stderr
,
" l %2d v %4x "
,
length
,
value
));
Assert
(
length
>
0
&&
length
<=
15
,
"invalid length"
);
s
->
bits_sent
+=
(
ulg
)
length
;
...
...
@@ -227,11 +226,13 @@ local void send_bits(s, value, length)
/* the arguments must not have side effects */
/* ===========================================================================
* Initialize the various 'constant' tables.
* To do: do this at compile time.
* Initialize the various 'constant' tables. In a multi-threaded environment,
* this function may be called by two threads concurrently, but this is
* harmless since both invocations do exactly the same thing.
*/
local
void
ct
_static_init
()
local
void
tr
_static_init
()
{
static
static_init_done
=
0
;
int
n
;
/* iterates over tree elements */
int
bits
;
/* bit counter */
int
length
;
/* length value */
...
...
@@ -240,6 +241,8 @@ local void ct_static_init()
ush
bl_count
[
MAX_BITS
+
1
];
/* number of codes at each bit length for an optimal tree */
if
(
static_init_done
)
return
;
/* Initialize the mapping length (0..255) -> length code (0..28) */
length
=
0
;
for
(
code
=
0
;
code
<
LENGTH_CODES
-
1
;
code
++
)
{
...
...
@@ -248,7 +251,7 @@ local void ct_static_init()
length_code
[
length
++
]
=
(
uch
)
code
;
}
}
Assert
(
length
==
256
,
"
ct
_static_init: length != 256"
);
Assert
(
length
==
256
,
"
tr
_static_init: length != 256"
);
/* Note that the length 255 (match length 258) can be represented
* in two different ways: code 284 + 5 bits or code 285, so we
* overwrite length_code[255] to use the best encoding:
...
...
@@ -263,7 +266,7 @@ local void ct_static_init()
dist_code
[
dist
++
]
=
(
uch
)
code
;
}
}
Assert
(
dist
==
256
,
"
ct
_static_init: dist != 256"
);
Assert
(
dist
==
256
,
"
tr
_static_init: dist != 256"
);
dist
>>=
7
;
/* from now on, all distances are divided by 128 */
for
(
;
code
<
D_CODES
;
code
++
)
{
base_dist
[
code
]
=
dist
<<
7
;
...
...
@@ -271,7 +274,7 @@ local void ct_static_init()
dist_code
[
256
+
dist
++
]
=
(
uch
)
code
;
}
}
Assert
(
dist
==
256
,
"
ct
_static_init: 256+dist != 512"
);
Assert
(
dist
==
256
,
"
tr
_static_init: 256+dist != 512"
);
/* Construct the codes of the static literal tree */
for
(
bits
=
0
;
bits
<=
MAX_BITS
;
bits
++
)
bl_count
[
bits
]
=
0
;
...
...
@@ -289,19 +292,18 @@ local void ct_static_init()
/* The static distance tree is trivial: */
for
(
n
=
0
;
n
<
D_CODES
;
n
++
)
{
static_dtree
[
n
].
Len
=
5
;
static_dtree
[
n
].
Code
=
bi_reverse
(
n
,
5
);
static_dtree
[
n
].
Code
=
bi_reverse
(
(
unsigned
)
n
,
5
);
}
static_init_done
=
1
;
}
/* ===========================================================================
* Initialize the tree data structures for a new zlib stream.
*/
void
ct
_init
(
s
)
void
_tr
_init
(
s
)
deflate_state
*
s
;
{
if
(
static_dtree
[
0
].
Len
==
0
)
{
ct_static_init
();
/* To do: at compile time */
}
tr_static_init
();
s
->
compressed_len
=
0L
;
...
...
@@ -523,7 +525,7 @@ local void gen_codes (tree, max_code, bl_count)
/* Now reverse the bits */
tree
[
n
].
Code
=
bi_reverse
(
next_code
[
len
]
++
,
len
);
Tracec
(
tree
!=
static_ltree
,
(
stderr
,
"
\n
n %3d %c l %2d c %4x (%x) "
,
Tracec
v
(
tree
!=
static_ltree
,
(
stderr
,
"
\n
n %3d %c l %2d c %4x (%x) "
,
n
,
(
isgraph
(
n
)
?
n
:
' '
),
len
,
tree
[
n
].
Code
,
next_code
[
len
]
-
1
));
}
}
...
...
@@ -783,14 +785,14 @@ local void send_all_trees(s, lcodes, dcodes, blcodes)
/* ===========================================================================
* Send a stored block
*/
void
ct
_stored_block
(
s
,
buf
,
stored_len
,
eof
)
void
_tr
_stored_block
(
s
,
buf
,
stored_len
,
eof
)
deflate_state
*
s
;
charf
*
buf
;
/* input block */
ulg
stored_len
;
/* length of input block */
int
eof
;
/* true if this is the last block for a file */
{
send_bits
(
s
,
(
STORED_BLOCK
<<
1
)
+
eof
,
3
);
/* send block type */
s
->
compressed_len
=
(
s
->
compressed_len
+
3
+
7
)
&
~
7L
;
s
->
compressed_len
=
(
s
->
compressed_len
+
3
+
7
)
&
(
ulg
)
~
7L
;
s
->
compressed_len
+=
(
stored_len
+
4
)
<<
3
;
copy_block
(
s
,
buf
,
(
unsigned
)
stored_len
,
1
);
/* with header */
...
...
@@ -799,12 +801,15 @@ void ct_stored_block(s, buf, stored_len, eof)
/* ===========================================================================
* Send one empty static block to give enough lookahead for inflate.
* This takes 10 bits, of which 7 may remain in the bit buffer.
* The current inflate code requires 9 bits of lookahead. If the EOB
* code for the previous block was coded on 5 bits or less, inflate
* may have only 5+3 bits of lookahead to decode this EOB.
* (There are no problems if the previous block is stored or fixed.)
* The current inflate code requires 9 bits of lookahead. If the
* last two codes for the previous block (real code plus EOB) were coded
* on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode
* the last real code. In this case we send two empty static blocks instead
* of one. (There are no problems if the previous block is stored or fixed.)
* To simplify the code, we assume the worst case of last real code encoded
* on one bit only.
*/
void
ct
_align
(
s
)
void
_tr
_align
(
s
)
deflate_state
*
s
;
{
send_bits
(
s
,
STATIC_TREES
<<
1
,
3
);
...
...
@@ -812,10 +817,11 @@ void ct_align(s)
s
->
compressed_len
+=
10L
;
/* 3 for block type, 7 for EOB */
bi_flush
(
s
);
/* Of the 10 bits for the empty block, we have already sent
* (10 - bi_valid) bits. The lookahead for the EOB of the previous
* block was thus its length plus what we have just sent.
* (10 - bi_valid) bits. The lookahead for the last real code (before
* the EOB of the previous block) was thus at least one plus the length
* of the EOB plus what we have just sent of the empty static block.
*/
if
(
s
->
last_eob_len
+
10
-
s
->
bi_valid
<
9
)
{
if
(
1
+
s
->
last_eob_len
+
10
-
s
->
bi_valid
<
9
)
{
send_bits
(
s
,
STATIC_TREES
<<
1
,
3
);
send_code
(
s
,
END_BLOCK
,
static_ltree
);
s
->
compressed_len
+=
10L
;
...
...
@@ -829,44 +835,52 @@ void ct_align(s)
* trees or store, and output the encoded block to the zip file. This function
* returns the total compressed length for the file so far.
*/
ulg
ct
_flush_block
(
s
,
buf
,
stored_len
,
eof
)
ulg
_tr
_flush_block
(
s
,
buf
,
stored_len
,
eof
)
deflate_state
*
s
;
charf
*
buf
;
/* input block, or NULL if too old */
ulg
stored_len
;
/* length of input block */
int
eof
;
/* true if this is the last block for a file */
{
ulg
opt_lenb
,
static_lenb
;
/* opt_len and static_len in bytes */
int
max_blindex
;
/* index of last bit length code of non zero freq */
int
max_blindex
=
0
;
/* index of last bit length code of non zero freq */
/* Check if the file is ascii or binary
*/
if
(
s
->
data_type
==
UNKNOWN
)
set_data_type
(
s
);
/* Build the Huffman trees unless a stored block is forced
*/
if
(
s
->
level
>
0
)
{
/* Construct the literal and distance trees */
build_tree
(
s
,
(
tree_desc
*
)(
&
(
s
->
l_desc
)));
Tracev
((
stderr
,
"
\n
lit data: dyn %ld, stat %ld"
,
s
->
opt_len
,
s
->
static_len
));
/* Check if the file is ascii or binary */
if
(
s
->
data_type
==
Z_UNKNOWN
)
set_data_type
(
s
);
build_tree
(
s
,
(
tree_desc
*
)(
&
(
s
->
d_desc
)));
Tracev
((
stderr
,
"
\n
dist data: dyn %ld, stat %ld"
,
s
->
opt_len
,
s
->
static_len
));
/* At this point, opt_len and static_len are the total bit lengths of
* the compressed block data, excluding the tree representations.
*/
/* Construct the literal and distance trees */
build_tree
(
s
,
(
tree_desc
*
)(
&
(
s
->
l_desc
)));
Tracev
((
stderr
,
"
\n
lit data: dyn %ld, stat %ld"
,
s
->
opt_len
,
s
->
static_len
));
/* Build the bit length tree for the above two trees, and get the index
* in bl_order of the last bit length code to send.
*/
max_blindex
=
build_bl_tree
(
s
);
build_tree
(
s
,
(
tree_desc
*
)(
&
(
s
->
d_desc
)));
Tracev
((
stderr
,
"
\n
dist data: dyn %ld, stat %ld"
,
s
->
opt_len
,
s
->
static_len
));
/* At this point, opt_len and static_len are the total bit lengths of
* the compressed block data, excluding the tree representations.
*/
/* Determine the best encoding. Compute first the block length in bytes */
opt_lenb
=
(
s
->
opt_len
+
3
+
7
)
>>
3
;
static_lenb
=
(
s
->
static_len
+
3
+
7
)
>>
3
;
/* Build the bit length tree for the above two trees, and get the index
* in bl_order of the last bit length code to send.
*/
max_blindex
=
build_bl_tree
(
s
);
Tracev
((
stderr
,
"
\n
opt %lu(%lu) stat %lu(%lu) stored %lu lit %u "
,
opt_lenb
,
s
->
opt_len
,
static_lenb
,
s
->
static_len
,
stored_len
,
s
->
last_lit
))
;
/* Determine the best encoding. Compute first the block length in bytes*/
opt_lenb
=
(
s
->
opt_len
+
3
+
7
)
>>
3
;
static_lenb
=
(
s
->
static_len
+
3
+
7
)
>>
3
;
if
(
static_lenb
<=
opt_lenb
)
opt_lenb
=
static_lenb
;
Tracev
((
stderr
,
"
\n
opt %lu(%lu) stat %lu(%lu) stored %lu lit %u "
,
opt_lenb
,
s
->
opt_len
,
static_lenb
,
s
->
static_len
,
stored_len
,
s
->
last_lit
));
if
(
static_lenb
<=
opt_lenb
)
opt_lenb
=
static_lenb
;
}
else
{
Assert
(
buf
!=
(
char
*
)
0
,
"lost buf"
);
opt_lenb
=
static_lenb
=
stored_len
+
5
;
/* force a stored block */
}
/* If compression failed and this is the first and last block,
* and if the .zip file can be seeked (to rewrite the local header),
...
...
@@ -874,7 +888,7 @@ ulg ct_flush_block(s, buf, stored_len, eof)
*/
#ifdef STORED_FILE_OK
# ifdef FORCE_STORED_FILE
if
(
eof
&&
compressed_len
==
0L
)
{
/* force stored file */
if
(
eof
&&
s
->
compressed_len
==
0L
)
{
/* force stored file */
# else
if
(
stored_len
<=
opt_lenb
&&
eof
&&
s
->
compressed_len
==
0L
&&
seekable
())
{
# endif
...
...
@@ -899,7 +913,7 @@ ulg ct_flush_block(s, buf, stored_len, eof)
* successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
* transform a block into a stored block.
*/
ct
_stored_block
(
s
,
buf
,
stored_len
,
eof
);
_tr
_stored_block
(
s
,
buf
,
stored_len
,
eof
);
#ifdef FORCE_STATIC
}
else
if
(
static_lenb
>=
0
)
{
/* force static trees */
...
...
@@ -933,10 +947,10 @@ ulg ct_flush_block(s, buf, stored_len, eof)
* Save the match info and tally the frequency counts. Return true if
* the current block must be flushed.
*/
int
ct
_tally
(
s
,
dist
,
lc
)
int
_tr
_tally
(
s
,
dist
,
lc
)
deflate_state
*
s
;
int
dist
;
/* distance of matched string */
int
lc
;
/* match length-MIN_MATCH or unmatched char (if dist==0) */
unsigned
dist
;
/* distance of matched string */
unsigned
lc
;
/* match length-MIN_MATCH or unmatched char (if dist==0) */
{
s
->
d_buf
[
s
->
last_lit
]
=
(
ush
)
dist
;
s
->
l_buf
[
s
->
last_lit
++
]
=
(
uch
)
lc
;
...
...
@@ -949,7 +963,7 @@ int ct_tally (s, dist, lc)
dist
--
;
/* dist = match distance - 1 */
Assert
((
ush
)
dist
<
(
ush
)
MAX_DIST
(
s
)
&&
(
ush
)
lc
<=
(
ush
)(
MAX_MATCH
-
MIN_MATCH
)
&&
(
ush
)
d_code
(
dist
)
<
(
ush
)
D_CODES
,
"
ct
_tally: bad match"
);
(
ush
)
d_code
(
dist
)
<
(
ush
)
D_CODES
,
"
_tr
_tally: bad match"
);
s
->
dyn_ltree
[
length_code
[
lc
]
+
LITERALS
+
1
].
Freq
++
;
s
->
dyn_dtree
[
d_code
(
dist
)].
Freq
++
;
...
...
@@ -959,7 +973,7 @@ int ct_tally (s, dist, lc)
if
(
s
->
level
>
2
&&
(
s
->
last_lit
&
0xfff
)
==
0
)
{
/* Compute an upper bound for the compressed length */
ulg
out_length
=
(
ulg
)
s
->
last_lit
*
8L
;
ulg
in_length
=
(
ulg
)
s
->
strstart
-
s
->
block_start
;
ulg
in_length
=
(
ulg
)
((
long
)
s
->
strstart
-
s
->
block_start
)
;
int
dcode
;
for
(
dcode
=
0
;
dcode
<
D_CODES
;
dcode
++
)
{
out_length
+=
(
ulg
)
s
->
dyn_dtree
[
dcode
].
Freq
*
...
...
@@ -1043,7 +1057,7 @@ local void set_data_type(s)
while
(
n
<
7
)
bin_freq
+=
s
->
dyn_ltree
[
n
++
].
Freq
;
while
(
n
<
128
)
ascii_freq
+=
s
->
dyn_ltree
[
n
++
].
Freq
;
while
(
n
<
LITERALS
)
bin_freq
+=
s
->
dyn_ltree
[
n
++
].
Freq
;
s
->
data_type
=
(
Byte
)(
bin_freq
>
(
ascii_freq
>>
2
)
?
BINARY
:
ASCII
);
s
->
data_type
=
(
Byte
)(
bin_freq
>
(
ascii_freq
>>
2
)
?
Z_BINARY
:
Z_
ASCII
);
}
/* ===========================================================================
...
...
uncompr.c
浏览文件 @
56bcb184
/* uncompr.c -- decompress a memory buffer
* Copyright (C) 1995 Jean-loup Gailly.
* Copyright (C) 1995
-1996
Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -25,13 +25,13 @@
int
uncompress
(
dest
,
destLen
,
source
,
sourceLen
)
Bytef
*
dest
;
uLongf
*
destLen
;
Bytef
*
source
;
const
Bytef
*
source
;
uLong
sourceLen
;
{
z_stream
stream
;
int
err
;
stream
.
next_in
=
source
;
stream
.
next_in
=
(
Bytef
*
)
source
;
stream
.
avail_in
=
(
uInt
)
sourceLen
;
/* Check for source > 64K on 16-bit machine: */
if
((
uLong
)
stream
.
avail_in
!=
sourceLen
)
return
Z_BUF_ERROR
;
...
...
zconf.h
浏览文件 @
56bcb184
/* zconf.h -- configuration of the zlib compression library
* Copyright (C) 1995 Jean-loup Gailly.
* Copyright (C) 1995
-1996
Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -9,22 +9,55 @@
#define _ZCONF_H
/*
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.
* People prefering a unique prefix for all types and library functions
* should compile with -DZ_PREFIX
*/
#ifdef Z_PREFIX
# define deflateInit_ z_deflateInit_
# define deflate z_deflate
# define deflateEnd z_deflateEnd
# define inflateInit_ z_inflateInit_
# define inflate z_inflate
# define inflateEnd z_inflateEnd
# define deflateInit2_ z_deflateInit2_
# define deflateCopy z_deflateCopy
# define deflateReset z_deflateReset
# define deflateParams z_deflateParams
# define inflateInit2_ z_inflateInit2_
# define inflateSync z_inflateSync
# define inflateReset z_inflateReset
# define compress z_compress
# define uncompress z_uncompress
# define adler32 z_adler32
# define crc32 z_crc32
# define get_crc_table z_get_crc_table
# define Byte z_Byte
# define uInt z_uInt
# define uLong z_uLong
# define Bytef z_Bytef
# define charf z_charf
# define intf z_intf
# define uIntf z_uIntf
# define uLongf z_uLongf
# define voidpf z_voidpf
# define voidp z_voidp
#endif
/*
* Compile with -DMAXSEG_64K if the alloc function cannot allocate more
* than 64k bytes at a time (needed on systems with 16-bit int).
*/
#if defined(_GNUC__) && !defined(__32BIT__)
#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
# define WIN32
#endif
#if (defined(__GNUC__) || defined(WIN32)) && !defined(__32BIT__)
# define __32BIT__
#endif
#if defined(__MSDOS__) && !defined(MSDOS)
# define MSDOS
#endif
/*
* Compile with -DMAXSEG_64K if the alloc function cannot allocate more
* than 64k bytes at a time (needed on systems with 16-bit int).
*/
#if defined(MSDOS) && !defined(__32BIT__)
# define MAXSEG_64K
#endif
...
...
@@ -32,20 +65,20 @@
# define UNALIGNED_OK
#endif
#ifndef STDC
# if defined(MSDOS) || defined(__STDC__) || defined(__cplusplus)
# define STDC
# endif
#if (defined(MSDOS) || defined(_WINDOWS) || defined(WIN32)) && !defined(STDC)
# define STDC
#endif
#if (defined(__STDC__) || defined(__cplusplus)) && !defined(STDC)
# define STDC
#endif
#ifndef STDC
# ifndef const
# define const
# endif
#if !defined(STDC) && !defined(const)
# define const
#endif
#ifdef __MWERKS__
/* Metrowerks CodeWarrior declares fileno() in unix.h */
# include <unix.h>
# define Byte _Byte
/* Byte already used on Mac */
#endif
/* Maximum value for memLevel in deflateInit2 */
...
...
@@ -92,6 +125,7 @@
* just define FAR to be empty.
*/
#if defined(M_I86SM) || defined(M_I86MM)
/* MSC small or medium model */
# define SMALL_MEDIUM
# ifdef _MSC_VER
# define FAR __far
# else
...
...
@@ -99,20 +133,26 @@
# endif
#endif
#if defined(__BORLANDC__) && (defined(__SMALL__) || defined(__MEDIUM__))
# define FAR __far
/* completely untested, just a best guess */
# define SMALL_MEDIUM
# define FAR __far
#endif
#ifndef FAR
# define FAR
#endif
/* The Watcom compiler defines M_I86SM and __SMALL__ even in 32 bit mode */
#if defined(__WATCOMC__) && defined(__386__)
# undef FAR
# undef SMALL_MEDIUM
#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
Byte
FAR
Bytef
;
typedef
char
FAR
charf
;
typedef
int
FAR
intf
;
typedef
uInt
FAR
uIntf
;
typedef
uLong
FAR
uLongf
;
#ifdef STDC
...
...
zlib.h
浏览文件 @
56bcb184
此差异已折叠。
点击以展开。
zutil.c
浏览文件 @
56bcb184
/* zutil.c -- target dependent utility functions for the compression library
* Copyright (C) 1995 Jean-loup Gailly.
* Copyright (C) 1995
-1996
Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -11,20 +11,22 @@
struct
internal_state
{
int
dummy
;};
/* for buggy compilers */
#ifndef
__GO32__
#ifndef
STDC
extern
void
exit
OF
((
int
));
#endif
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) */
const
char
*
zlib_version
=
ZLIB_VERSION
;
const
char
*
z_errmsg
[
10
]
=
{
"need dictionary"
,
/* Z_NEED_DICT 2 */
"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) */
"incompatible version"
,
/* Z_VERSION_ERROR (-6) */
""
};
...
...
@@ -59,9 +61,10 @@ void zmemzero(dest, len)
}
#endif
#if defined( __TURBOC__) && !defined(__SMALL__) && !defined(__MEDIUM__)
/* Small and medium model are for now limited to near allocation with
* reduced MAX_WBITS and MAX_MEM_LEVEL
#ifdef __TURBOC__
#if (defined( __BORLANDC__) || !defined(SMALL_MEDIUM)) && !defined(__32BIT__)
/* Small and medium model in Turbo C are for now limited to near allocation
* with reduced MAX_WBITS and MAX_MEM_LEVEL
*/
# define MY_ZCALLOC
...
...
@@ -94,7 +97,10 @@ voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
voidpf
buf
=
opaque
;
/* just to make some compilers happy */
ulg
bsize
=
(
ulg
)
items
*
size
;
if
(
bsize
<
65536L
)
{
/* If we allocate less than 65520 bytes, we assume that farmalloc
* will return a usable pointer which doesn't have to be normalized.
*/
if
(
bsize
<
65520L
)
{
buf
=
farmalloc
(
bsize
);
if
(
*
(
ush
*
)
&
buf
!=
0
)
return
buf
;
}
else
{
...
...
@@ -131,9 +137,11 @@ void zcfree (voidpf opaque, voidpf ptr)
ptr
=
opaque
;
/* just to make some compilers happy */
z_error
(
"zcfree: ptr not found"
);
}
#endif
#endif
/* __TURBOC__ */
#if defined(M_I86SM)||defined(M_I86MM)||defined(M_I86CM)||defined(M_I86LM)
#if defined(M_I86) && !(defined(__WATCOMC__) && defined(__386__))
/* Microsoft C */
# define MY_ZCALLOC
...
...
@@ -160,7 +168,7 @@ void zcfree (voidpf opaque, voidpf ptr)
#ifndef MY_ZCALLOC
/* Any system without a special alloc function */
#ifndef
__GO32__
#ifndef
STDC
extern
voidp
calloc
OF
((
uInt
items
,
uInt
size
));
extern
void
free
OF
((
voidpf
ptr
));
#endif
...
...
@@ -170,6 +178,7 @@ voidpf zcalloc (opaque, items, size)
unsigned
items
;
unsigned
size
;
{
if
(
opaque
)
opaque
=
0
;
/* to make compiler happy */
return
(
voidpf
)
calloc
(
items
,
size
);
}
...
...
@@ -177,6 +186,7 @@ void zcfree (opaque, ptr)
voidpf
opaque
;
voidpf
ptr
;
{
if
(
opaque
)
opaque
=
0
;
/* to make compiler happy */
free
(
ptr
);
}
...
...
zutil.h
浏览文件 @
56bcb184
/* zutil.h -- internal interface and configuration of the compression library
* Copyright (C) 1995 Jean-loup Gailly.
* Copyright (C) 1995
-1996
Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
...
...
@@ -15,7 +15,7 @@
#include "zlib.h"
#if defined(MSDOS) || defined(VMS)
#if defined(MSDOS) || defined(VMS)
|| defined(CRAY) || defined(WIN32)
# include <stddef.h>
# include <errno.h>
#else
...
...
@@ -23,6 +23,7 @@
#endif
#ifdef STDC
# include <string.h>
# include <stdlib.h>
#endif
#ifndef local
...
...
@@ -36,15 +37,17 @@ typedef unsigned short ush;
typedef
ush
FAR
ushf
;
typedef
unsigned
long
ulg
;
extern
char
*
z_errmsg
[];
/* indexed by 1-zlib_error */
extern
const
char
*
z_errmsg
[
10
];
/* indexed by 2-zlib_error */
/* (size given to avoid silly warnings with Visual C++) */
#define ERR_RETURN(strm,err) return (strm->msg=z_errmsg[1-err], err)
#define ERR_MSG(err) (char*)z_errmsg[Z_NEED_DICT-(err)]
#define ERR_RETURN(strm,err) \
return (strm->msg = ERR_MSG(err), (err))
/* To be used only when the state is known to be valid */
/* common constants */
#define DEFLATED 8
#ifndef DEF_WBITS
# define DEF_WBITS MAX_WBITS
#endif
...
...
@@ -66,6 +69,8 @@ extern char *z_errmsg[]; /* indexed by 1-zlib_error */
#define MAX_MATCH 258
/* The minimum and maximum match lengths */
#define PRESET_DICT 0x20
/* preset dictionary flag in zlib header */
/* target dependencies */
#ifdef MSDOS
...
...
@@ -81,7 +86,7 @@ extern char *z_errmsg[]; /* indexed by 1-zlib_error */
# define OS_CODE 0x06
#endif
#ifdef WIN32
/* Windows NT */
#ifdef WIN32
/* Window
95 & Window
s NT */
# define OS_CODE 0x0b
#endif
...
...
@@ -143,11 +148,13 @@ extern char *z_errmsg[]; /* indexed by 1-zlib_error */
# define HAVE_MEMCPY
#endif
#ifdef HAVE_MEMCPY
# if
defined(M_I86SM) || defined(M_I86MM)
/* MSC
small or medium model */
# if
def SMALL_MEDIUM
/* MSDOS
small or medium model */
# define zmemcpy _fmemcpy
# define zmemcmp _fmemcmp
# define zmemzero(dest, len) _fmemset(dest, 0, len)
# else
# define zmemcpy memcpy
# define zmemcmp memcmp
# define zmemzero(dest, len) memset(dest, 0, len)
# endif
#else
...
...
@@ -177,7 +184,7 @@ extern char *z_errmsg[]; /* indexed by 1-zlib_error */
#endif
typedef
uLong
(
*
check_func
)
OF
((
uLong
check
,
Bytef
*
buf
,
uInt
len
));
typedef
uLong
(
*
check_func
)
OF
((
uLong
check
,
const
Bytef
*
buf
,
uInt
len
));
extern
void
z_error
OF
((
char
*
m
));
...
...
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