zlib 1.0.7

This commit is contained in:
Mark Adler
2011-09-09 23:17:33 -07:00
parent ebd3c2c0e7
commit 7850e4e406
58 changed files with 4608 additions and 519 deletions

21
contrib/README.contrib Normal file
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All files under this contrib directory are UNSUPPORTED. There were
provided by users of zlib and were not tested by the authors of zlib.
Use at your own risk. Please contact the authors of the contributions
for help about these, not the zlib authors. Thanks.
asm386/ by Gilles Vollant <info@winimage.com>
386 asm code replacing longest_match(). This code may be slower
than the C code if you have a good compiler.
iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
A C++ I/O streams interface to the zlib gz* functions
iostream2/ by Tyge L<>vset <Tyge.Lovset@cmr.no>
Another C++ I/O streams interface
untgz/ by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
A very simple tar.gz file extractor using zlib
visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
How to use compress(), uncompress() and the gz* functions from VB.

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contrib/asm386/gvmat32.asm Normal file
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;
; gvmat32.asm -- Asm portion of the optimized longest_match for 32 bits x86
; Copyright (C) 1995-1996 Jean-loup Gailly and Gilles Vollant.
; File written by Gilles Vollant, by modifiying the longest_match
; from Jean-loup Gailly in deflate.c
; It need wmask == 0x7fff
; (assembly code is faster with a fixed wmask)
;
; For Visual C++ 4.2 and ML 6.11c (version in directory \MASM611C of Win95 DDK)
; I compile with : "ml /coff /Zi /c gvmat32.asm"
;
; uInt longest_match_gvasm(IPos cur_match,int* match_start_ptr,uInt scan_end,
; uInt scan_start,ush* prev,uch* window,int best_len,
; IPos limit,uInt chain_length,uch* scanrp,
; uInt nice_match);
;uInt longest_match(s, cur_match)
; deflate_state *s;
; IPos cur_match; /* current match */
NbStack equ 76
cur_match equ dword ptr[esp+NbStack-0]
str_s equ dword ptr[esp+NbStack-4]
; 5 dword on top (ret,ebp,esi,edi,ebx)
adrret equ dword ptr[esp+NbStack-8]
pushebp equ dword ptr[esp+NbStack-12]
pushedi equ dword ptr[esp+NbStack-16]
pushesi equ dword ptr[esp+NbStack-20]
pushebx equ dword ptr[esp+NbStack-24]
chain_length equ dword ptr [esp+NbStack-28]
limit equ dword ptr [esp+NbStack-32]
best_len equ dword ptr [esp+NbStack-36]
window equ dword ptr [esp+NbStack-40]
prev equ dword ptr [esp+NbStack-44]
scan_start equ word ptr [esp+NbStack-48]
scan_end equ word ptr [esp+NbStack-52]
match_start_ptr equ dword ptr [esp+NbStack-56]
nice_match equ dword ptr [esp+NbStack-60]
scanrp equ dword ptr [esp+NbStack-64]
windowlen equ dword ptr [esp+NbStack-68]
match_start equ dword ptr [esp+NbStack-72]
strend equ dword ptr [esp+NbStack-76]
NbStackAdd equ (76-24)
.386p
name gvmatch
.MODEL FLAT
@lmtype TYPEDEF PROTO C :PTR , :SDWORD
longest_match_c PROTO @lmtype
dep_max_chain_length equ 70h
dep_window equ 2ch
dep_strstart equ 60h
dep_prev_length equ 6ch
dep_nice_match equ 84h
dep_w_size equ 20h
dep_prev equ 34h
dep_w_mask equ 28h
dep_good_match equ 80h
dep_match_start equ 64h
dep_lookahead equ 68h
_TEXT segment
public _longest_match_asm7fff
MAX_MATCH equ 258
MIN_MATCH equ 3
MIN_LOOKAHEAD equ (MAX_MATCH+MIN_MATCH+1)
; initialize or check the variables used in match.asm.
; -----------------------------------------------------------------------
; Set match_start to the longest match starting at the given string and
; return its length. Matches shorter or equal to prev_length are discarded,
; in which case the result is equal to prev_length and match_start is
; garbage.
; IN assertions: cur_match is the head of the hash chain for the current
; string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
; int longest_match(cur_match)
_longest_match_asm7fff proc near
; return address
mov eax,[esp+4]
mov bx,[eax+dep_w_mask]
cmp bx,7fffh
jnz longest_match_c
push ebp
push edi
push esi
push ebx
sub esp,NbStackAdd
;//mov ebp,str_s
mov ebp,eax
mov eax,[ebp+dep_max_chain_length]
mov ebx,[ebp+dep_prev_length]
cmp [ebp+dep_good_match],ebx ; if prev_length>=good_match chain_length >>= 2
ja noshr
shr eax,2
noshr:
mov edi,[ebp+dep_nice_match]
mov chain_length,eax
mov edx,[ebp+dep_lookahead]
cmp edx,edi
;if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
jae nolookaheadnicematch
mov edi,edx
nolookaheadnicematch:
mov best_len,ebx
mov esi,[ebp+dep_window]
mov ecx,[ebp+dep_strstart]
mov window,esi
mov nice_match,edi
add esi,ecx
mov scanrp,esi
mov ax,word ptr [esi]
mov bx,word ptr [esi+ebx-1]
add esi,MAX_MATCH-1
mov scan_start,ax
mov strend,esi
mov scan_end,bx
; IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
; s->strstart - (IPos)MAX_DIST(s) : NIL;
mov esi,[ebp+dep_w_size]
sub esi,MIN_LOOKAHEAD
; here esi = MAX_DIST(s)
sub ecx,esi
ja nodist
xor ecx,ecx
nodist:
mov limit,ecx
mov eax,[ebp+dep_prev]
mov prev,eax
mov ebx,dword ptr [ebp+dep_match_start]
mov bp,scan_start
mov edx,cur_match
mov match_start,ebx
mov bx,scan_end
mov eax,window
mov edi,eax
add edi,best_len
mov esi,prev
dec edi
mov windowlen,edi
jmp beginloop2
align 4
; here, in the loop
;;;; eax = chain_length
; edx = dx = cur_match
; ecx = limit
; bx = scan_end
; bp = scan_start
; edi = windowlen (window + best_len)
; esi = prev
;// here; eax <=16
normalbeg0add16:
add chain_length,16
jz exitloop
normalbeg0:
cmp word ptr[edi+edx-0],bx
je normalbeg2
and edx,7fffh
mov dx,word ptr[esi+edx*2]
cmp ecx,edx
jnb exitloop
dec chain_length
jnz normalbeg0
;jnbexitloopshort1:
jmp exitloop
contloop3:
mov edi,windowlen
; cur_match = prev[cur_match & wmask]
and edx,7fffh
mov dx,word ptr[esi+edx*2]
; if cur_match > limit, go to exitloop
cmp ecx,edx
jnbexitloopshort1:
jnb exitloop
; if --chain_length != 0, go to exitloop
beginloop2:
sub chain_length,16+1
jna normalbeg0add16
do16:
cmp word ptr[edi+edx],bx
je normalbeg2dc0
maccn MACRO lab
and edx,7fffh
mov dx,word ptr[esi+edx*2]
cmp ecx,edx
jnb exitloop
cmp word ptr[edi+edx-0],bx
je lab
ENDM
rcontloop0:
maccn normalbeg2dc1
rcontloop1:
maccn normalbeg2dc2
rcontloop2:
maccn normalbeg2dc3
rcontloop3:
maccn normalbeg2dc4
rcontloop4:
maccn normalbeg2dc5
rcontloop5:
maccn normalbeg2dc6
rcontloop6:
maccn normalbeg2dc7
rcontloop7:
maccn normalbeg2dc8
rcontloop8:
maccn normalbeg2dc9
rcontloop9:
maccn normalbeg2dc10
rcontloop10:
maccn normalbeg2dc11
rcontloop11:
maccn short normalbeg2dc12
rcontloop12:
maccn short normalbeg2dc13
rcontloop13:
maccn short normalbeg2dc14
rcontloop14:
maccn short normalbeg2dc15
rcontloop15:
and edx,7fffh
mov dx,word ptr[esi+edx*2]
cmp ecx,edx
jnb short exitloopshort
sub chain_length,16
ja do16
jmp normalbeg0add16
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
exitloopshort:
jmp exitloop
normbeg MACRO rcontlab,valsub
cmp bp,word ptr[eax+edx]
jne rcontlab
add chain_length,16-valsub
jmp iseq
ENDM
normalbeg2dc12:
normbeg rcontloop12,12
normalbeg2dc13:
normbeg rcontloop13,13
normalbeg2dc14:
normbeg rcontloop14,14
normalbeg2dc15:
normbeg rcontloop15,15
normalbeg2dc11:
normbeg rcontloop11,11
normalbeg2dc10:
normbeg rcontloop10,10
normalbeg2dc9:
normbeg rcontloop9,9
normalbeg2dc8:
normbeg rcontloop8,8
normalbeg2dc7:
normbeg rcontloop7,7
normalbeg2dc5:
normbeg rcontloop5,5
normalbeg2dc6:
normbeg rcontloop6,6
normalbeg2dc4:
normbeg rcontloop4,4
normalbeg2dc3:
normbeg rcontloop3,3
normalbeg2dc2:
normbeg rcontloop2,2
normalbeg2dc1:
normbeg rcontloop1,1
normalbeg2dc0:
normbeg rcontloop0,0
; we go in normalbeg2 because *(ushf*)(match+best_len-1) == scan_end
normalbeg2:
; 10 nop here take 10% time
mov edi,window
;mov chain_length,eax ; now, we need eax...
cmp bp,word ptr[edi+edx]
jne contloop3 ; if *(ushf*)match != scan_start, continue
iseq:
mov edi,eax
mov esi,scanrp ; esi = scan
add edi,edx ; edi = window + cur_match = match
mov eax,[esi+3] ; compare manually dword at match+3
xor eax,[edi+3] ; and scan +3
jz begincompare ; if equal, go to long compare
; we will determine the unmatch byte and calculate len (in esi)
or al,al
je eq1rr
mov esi,3
jmp trfinval
eq1rr:
or ax,ax
je eq1
mov esi,4
jmp trfinval
eq1:
shl eax,8
jz eq11
mov esi,5
jmp trfinval
eq11:
mov esi,6
jmp trfinval
begincompare:
; here we now scan and match begin same
add edi,6
add esi,6
mov ecx,(MAX_MATCH-(2+4))/4 ;//; scan for at most MAX_MATCH bytes
repe cmpsd ;//; loop until mismatch
je trfin ; go to trfin if not unmatch
; we determine the unmatch byte
sub esi,4
mov eax,[edi-4]
xor eax,[esi]
or al,al
jnz trfin
inc esi
or ax,ax
jnz trfin
inc esi
shl eax,8
jnz trfin
inc esi
trfin:
sub esi,scanrp ; esi = len
trfinval:
cmp esi,best_len ; if len <= best_len, go contloop2
jbe contloop2
mov best_len,esi ; len become best_len
mov match_start,edx
cmp esi,nice_match ;//; if esi >= nice_match, exit
mov ecx,scanrp
jae exitloop
add esi,window
add ecx,best_len
dec esi
mov windowlen,esi
mov bx,[ecx-1]
; now we restore eax, ecx and esi, for the big loop :
contloop2:
mov esi,prev
mov ecx,limit
;mov eax,chain_length
mov eax,window
jmp contloop3
exitloop:
mov ebx,match_start
mov ebp,str_s
mov dword ptr [ebp+dep_match_start],ebx
mov eax,best_len
add esp,NbStackAdd
pop ebx
pop esi
pop edi
pop ebp
ret
_longest_match_asm7fff endp
_TEXT ends
end

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contrib/asm386/gvmat32c.c Normal file
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/* gvmat32.c -- C portion of the optimized longest_match for 32 bits x86
* Copyright (C) 1995-1996 Jean-loup Gailly and Gilles Vollant.
* File written by Gilles Vollant, by modifiying the longest_match
* from Jean-loup Gailly in deflate.c
* it prepare all parameters and call the assembly longest_match_gvasm
* longest_match execute standard C code is wmask != 0x7fff
* (assembly code is faster with a fixed wmask)
*
*/
//#pragma optimize("agt",on)
#include "deflate.h"
#undef FAR
#include <windows.h>
#ifdef ASMV
#define NIL 0
static unsigned int tot=0;
static unsigned int totl0=0;
static unsigned int totl0p0=0;
static unsigned int ba0=0;
static unsigned int ba1=0;
static unsigned int cpta=0;
static unsigned int cptb=0;
#define UNALIGNED_OK
#define gvshow(a,b,c,d)
/*
void gvshow(int chain_length,int len,int limit,ushf* prev)
{
static int ival=0;
char sz[80];
unsigned long i;
int prev0=*prev;
ival++;
//wsprintf(sz,"call %u, len=%u, chain_length=%u\n",ival,len,chain_length);
//OutputDebugString(sz);
tot++;
if (limit==NIL)
totl0++;
if ((limit==NIL) && (prev0==0))
totl0p0++;
for (i=limit+1;i<32768;i++)
{
ush va=*(prev+i);
if (ba0>4000000000)
{
ba0+=10;
}
ba0++;
if ((va>limit) || (va==0))
continue;
ba1++;
}
}
*/
/* if your C compiler don't add underline before function name,
define ADD_UNDERLINE_ASMFUNC */
#ifdef ADD_UNDERLINE_ASMFUNC
#define longest_match_asm7fff _longest_match_asm7fff
#endif
void match_init()
{
}
uInt longest_match_c(
deflate_state *s,
IPos cur_match); /* current match */
uInt longest_match_asm7fff(
deflate_state *s,
IPos cur_match); /* current match */
uInt longest_match(
deflate_state *s,
IPos cur_match) /* current match */
{
if (s->w_mask == 0x7fff)
return longest_match_asm7fff(s,cur_match);
return longest_match_c(s,cur_match);
}
uInt longest_match_c(s, cur_match)
deflate_state *s;
IPos cur_match; /* current match */
{
unsigned chain_length = s->max_chain_length;/* max hash chain length */
register Bytef *scan = s->window + s->strstart; /* current string */
register Bytef *match; /* matched string */
register int len; /* length of current match */
int best_len = s->prev_length; /* best match length so far */
int nice_match = s->nice_match; /* stop if match long enough */
IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
s->strstart - (IPos)MAX_DIST(s) : NIL;
/* Stop when cur_match becomes <= limit. To simplify the code,
* we prevent matches with the string of window index 0.
*/
Posf *prev = s->prev;
uInt wmask = s->w_mask;
#ifdef UNALIGNED_OK
/* Compare two bytes at a time. Note: this is not always beneficial.
* Try with and without -DUNALIGNED_OK to check.
*/
register Bytef *strend = s->window + s->strstart + MAX_MATCH - 1;
register ush scan_start = *(ushf*)scan;
register ush scan_end = *(ushf*)(scan+best_len-1);
#else
register Bytef *strend = s->window + s->strstart + MAX_MATCH;
register Byte scan_end1 = scan[best_len-1];
register Byte scan_end = scan[best_len];
#endif
/* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
* It is easy to get rid of this optimization if necessary.
*/
Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
/* Do not waste too much time if we already have a good match: */
if (s->prev_length >= s->good_match) {
chain_length >>= 2;
}
/* Do not look for matches beyond the end of the input. This is necessary
* to make deflate deterministic.
*/
if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
do {
Assert(cur_match < s->strstart, "no future");
match = s->window + cur_match;
/* Skip to next match if the match length cannot increase
* or if the match length is less than 2:
*/
#if (defined(UNALIGNED_OK) && MAX_MATCH == 258)
/* This code assumes sizeof(unsigned short) == 2. Do not use
* UNALIGNED_OK if your compiler uses a different size.
*/
if (*(ushf*)(match+best_len-1) != scan_end ||
*(ushf*)match != scan_start) continue;
/* It is not necessary to compare scan[2] and match[2] since they are
* always equal when the other bytes match, given that the hash keys
* are equal and that HASH_BITS >= 8. Compare 2 bytes at a time at
* strstart+3, +5, ... up to strstart+257. We check for insufficient
* lookahead only every 4th comparison; the 128th check will be made
* at strstart+257. If MAX_MATCH-2 is not a multiple of 8, it is
* necessary to put more guard bytes at the end of the window, or
* to check more often for insufficient lookahead.
*/
Assert(scan[2] == match[2], "scan[2]?");
scan++, match++;
do {
} while (*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
scan < strend);
/* The funny "do {}" generates better code on most compilers */
/* Here, scan <= window+strstart+257 */
Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
if (*scan == *match) scan++;
len = (MAX_MATCH - 1) - (int)(strend-scan);
scan = strend - (MAX_MATCH-1);
#else /* UNALIGNED_OK */
if (match[best_len] != scan_end ||
match[best_len-1] != scan_end1 ||
*match != *scan ||
*++match != scan[1]) continue;
/* The check at best_len-1 can be removed because it will be made
* again later. (This heuristic is not always a win.)
* It is not necessary to compare scan[2] and match[2] since they
* are always equal when the other bytes match, given that
* the hash keys are equal and that HASH_BITS >= 8.
*/
scan += 2, match++;
Assert(*scan == *match, "match[2]?");
/* We check for insufficient lookahead only every 8th comparison;
* the 256th check will be made at strstart+258.
*/
do {
} while (*++scan == *++match && *++scan == *++match &&
*++scan == *++match && *++scan == *++match &&
*++scan == *++match && *++scan == *++match &&
*++scan == *++match && *++scan == *++match &&
scan < strend);
Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
len = MAX_MATCH - (int)(strend - scan);
scan = strend - MAX_MATCH;
#endif /* UNALIGNED_OK */
if (len > best_len) {
s->match_start = cur_match;
best_len = len;
if (len >= nice_match) break;
#ifdef UNALIGNED_OK
scan_end = *(ushf*)(scan+best_len-1);
#else
scan_end1 = scan[best_len-1];
scan_end = scan[best_len];
#endif
}
} while ((cur_match = prev[cur_match & wmask]) > limit
&& --chain_length != 0);
if ((uInt)best_len <= s->lookahead) return best_len;
return s->lookahead;
}
#endif /* ASMV */

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c:\masm611\bin\ml /coff /Zi /c /Flgvmat32.lst gvmat32.asm

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contrib/asm386/zlibvc.mak Normal file
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BSC32_FLAGS=/nologo /o"$(OUTDIR)/zlibvc.bsc"
BSC32_SBRS= \
"$(INTDIR)\adler32.sbr" \
"$(INTDIR)\compress.sbr" \
"$(INTDIR)\crc32.sbr" \
"$(INTDIR)\deflate.sbr" \
"$(INTDIR)\gvmat32c.sbr" \
"$(INTDIR)\gzio.sbr" \
"$(INTDIR)\infblock.sbr" \
"$(INTDIR)\infcodes.sbr" \
"$(INTDIR)\inffast.sbr" \
"$(INTDIR)\inflate.sbr" \
"$(INTDIR)\inftrees.sbr" \
"$(INTDIR)\infutil.sbr" \
"$(INTDIR)\trees.sbr" \
"$(INTDIR)\uncompr.sbr" \
"$(INTDIR)\zutil.sbr"
"$(OUTDIR)\zlibvc.bsc" : "$(OUTDIR)" $(BSC32_SBRS)
$(BSC32) @<<
$(BSC32_FLAGS) $(BSC32_SBRS)
<<
LINK32=link.exe
# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /dll /machine:I386
# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib crtdll.lib /nologo /subsystem:windows /dll /map /machine:I386 /nodefaultlib /out:"Release/zlib.dll"
LINK32_FLAGS=kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib\
advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib crtdll.lib /nologo\
/subsystem:windows /dll /incremental:no /pdb:"$(OUTDIR)/zlib.pdb"\
/map:"$(INTDIR)/zlib.map" /machine:I386 /nodefaultlib /def:".\zlib.def"\
/out:"$(OUTDIR)/zlib.dll" /implib:"$(OUTDIR)/zlib.lib"
DEF_FILE= \
".\zlib.def"
LINK32_OBJS= \
"$(INTDIR)\adler32.obj" \
"$(INTDIR)\compress.obj" \
"$(INTDIR)\crc32.obj" \
"$(INTDIR)\deflate.obj" \
"$(INTDIR)\gvmat32c.obj" \
"$(INTDIR)\gzio.obj" \
"$(INTDIR)\infblock.obj" \
"$(INTDIR)\infcodes.obj" \
"$(INTDIR)\inffast.obj" \
"$(INTDIR)\inflate.obj" \
"$(INTDIR)\inftrees.obj" \
"$(INTDIR)\infutil.obj" \
"$(INTDIR)\trees.obj" \
"$(INTDIR)\uncompr.obj" \
"$(INTDIR)\zlib.res" \
"$(INTDIR)\zutil.obj" \
".\GVMAT32.obj"
"$(OUTDIR)\zlib.dll" : "$(OUTDIR)" $(DEF_FILE) $(LINK32_OBJS)
$(LINK32) @<<
$(LINK32_FLAGS) $(LINK32_OBJS)
<<
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
# PROP BASE Use_MFC 0
# PROP BASE Use_Debug_Libraries 1
# PROP BASE Output_Dir "Debug"
# PROP BASE Intermediate_Dir "Debug"
# PROP BASE Target_Dir ""
# PROP Use_MFC 0
# PROP Use_Debug_Libraries 1
# PROP Output_Dir "Debug"
# PROP Intermediate_Dir "Debug"
# PROP Target_Dir ""
OUTDIR=.\Debug
INTDIR=.\Debug
ALL : "$(OUTDIR)\zlib.dll"
CLEAN :
-@erase "$(INTDIR)\adler32.obj"
-@erase "$(INTDIR)\compress.obj"
-@erase "$(INTDIR)\crc32.obj"
-@erase "$(INTDIR)\deflate.obj"
-@erase "$(INTDIR)\gvmat32c.obj"
-@erase "$(INTDIR)\gzio.obj"
-@erase "$(INTDIR)\infblock.obj"
-@erase "$(INTDIR)\infcodes.obj"
-@erase "$(INTDIR)\inffast.obj"
-@erase "$(INTDIR)\inflate.obj"
-@erase "$(INTDIR)\inftrees.obj"
-@erase "$(INTDIR)\infutil.obj"
-@erase "$(INTDIR)\trees.obj"
-@erase "$(INTDIR)\uncompr.obj"
-@erase "$(INTDIR)\vc40.idb"
-@erase "$(INTDIR)\vc40.pdb"
-@erase "$(INTDIR)\zlib.res"
-@erase "$(INTDIR)\zutil.obj"
-@erase "$(OUTDIR)\zlib.dll"
-@erase "$(OUTDIR)\zlib.exp"
-@erase "$(OUTDIR)\zlib.ilk"
-@erase "$(OUTDIR)\zlib.lib"
-@erase "$(OUTDIR)\zlib.pdb"
"$(OUTDIR)" :
if not exist "$(OUTDIR)/$(NULL)" mkdir "$(OUTDIR)"
# ADD BASE CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /YX /c
# ADD CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /D "_DEBUG" /D "WIN32" /D "_WINDOWS" /D "_WINDLL" /D "_WIN32" /D "BUILD_ZLIBDLL" /D "ZLIB_DLL" /YX /c
CPP_PROJ=/nologo /MTd /W3 /Gm /GX /Zi /Od /D "_DEBUG" /D "WIN32" /D "_WINDOWS"\
/D "_WINDLL" /D "_WIN32" /D "BUILD_ZLIBDLL" /D "ZLIB_DLL"\
/Fp"$(INTDIR)/zlibvc.pch" /YX /Fo"$(INTDIR)/" /Fd"$(INTDIR)/" /c
CPP_OBJS=.\Debug/
CPP_SBRS=.\.
# ADD BASE MTL /nologo /D "_DEBUG" /win32
# ADD MTL /nologo /D "_DEBUG" /win32
MTL_PROJ=/nologo /D "_DEBUG" /win32
# ADD BASE RSC /l 0x40c /d "_DEBUG"
# ADD RSC /l 0x40c /d "_DEBUG"
RSC_PROJ=/l 0x40c /fo"$(INTDIR)/zlib.res" /d "_DEBUG"
BSC32=bscmake.exe
# ADD BASE BSC32 /nologo
# ADD BSC32 /nologo
BSC32_FLAGS=/nologo /o"$(OUTDIR)/zlibvc.bsc"
BSC32_SBRS= \
LINK32=link.exe
# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /dll /debug /machine:I386
# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib /nologo /subsystem:windows /dll /debug /machine:I386 /out:"Debug/zlib.dll"
LINK32_FLAGS=kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib\
advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib /nologo\
/subsystem:windows /dll /incremental:yes /pdb:"$(OUTDIR)/zlib.pdb" /debug\
/machine:I386 /def:".\zlib.def" /out:"$(OUTDIR)/zlib.dll"\
/implib:"$(OUTDIR)/zlib.lib"
DEF_FILE= \
".\zlib.def"
LINK32_OBJS= \
"$(INTDIR)\adler32.obj" \
"$(INTDIR)\compress.obj" \
"$(INTDIR)\crc32.obj" \
"$(INTDIR)\deflate.obj" \
"$(INTDIR)\gvmat32c.obj" \
"$(INTDIR)\gzio.obj" \
"$(INTDIR)\infblock.obj" \
"$(INTDIR)\infcodes.obj" \
"$(INTDIR)\inffast.obj" \
"$(INTDIR)\inflate.obj" \
"$(INTDIR)\inftrees.obj" \
"$(INTDIR)\infutil.obj" \
"$(INTDIR)\trees.obj" \
"$(INTDIR)\uncompr.obj" \
"$(INTDIR)\zlib.res" \
"$(INTDIR)\zutil.obj" \
".\GVMAT32.obj"
"$(OUTDIR)\zlib.dll" : "$(OUTDIR)" $(DEF_FILE) $(LINK32_OBJS)
$(LINK32) @<<
$(LINK32_FLAGS) $(LINK32_OBJS)
<<
!ENDIF
.c{$(CPP_OBJS)}.obj:
$(CPP) $(CPP_PROJ) $<
.cpp{$(CPP_OBJS)}.obj:
$(CPP) $(CPP_PROJ) $<
.cxx{$(CPP_OBJS)}.obj:
$(CPP) $(CPP_PROJ) $<
.c{$(CPP_SBRS)}.sbr:
$(CPP) $(CPP_PROJ) $<
.cpp{$(CPP_SBRS)}.sbr:
$(CPP) $(CPP_PROJ) $<
.cxx{$(CPP_SBRS)}.sbr:
$(CPP) $(CPP_PROJ) $<
################################################################################
# Begin Target
# Name "zlibvc - Win32 Release"
# Name "zlibvc - Win32 Debug"
!IF "$(CFG)" == "zlibvc - Win32 Release"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
!ENDIF
################################################################################
# Begin Source File
SOURCE=.\adler32.c
DEP_CPP_ADLER=\
".\zconf.h"\
".\zlib.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\adler32.obj" : $(SOURCE) $(DEP_CPP_ADLER) "$(INTDIR)"
"$(INTDIR)\adler32.sbr" : $(SOURCE) $(DEP_CPP_ADLER) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\adler32.obj" : $(SOURCE) $(DEP_CPP_ADLER) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\compress.c
DEP_CPP_COMPR=\
".\zconf.h"\
".\zlib.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\compress.obj" : $(SOURCE) $(DEP_CPP_COMPR) "$(INTDIR)"
"$(INTDIR)\compress.sbr" : $(SOURCE) $(DEP_CPP_COMPR) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\compress.obj" : $(SOURCE) $(DEP_CPP_COMPR) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\crc32.c
DEP_CPP_CRC32=\
".\zconf.h"\
".\zlib.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\crc32.obj" : $(SOURCE) $(DEP_CPP_CRC32) "$(INTDIR)"
"$(INTDIR)\crc32.sbr" : $(SOURCE) $(DEP_CPP_CRC32) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\crc32.obj" : $(SOURCE) $(DEP_CPP_CRC32) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\deflate.c
!IF "$(CFG)" == "zlibvc - Win32 Release"
DEP_CPP_DEFLA=\
".\deflate.h"\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
"$(INTDIR)\deflate.obj" : $(SOURCE) $(DEP_CPP_DEFLA) "$(INTDIR)"
"$(INTDIR)\deflate.sbr" : $(SOURCE) $(DEP_CPP_DEFLA) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
DEP_CPP_DEFLA=\
".\deflate.h"\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
NODEP_CPP_DEFLA=\
".\local"\
"$(INTDIR)\deflate.obj" : $(SOURCE) $(DEP_CPP_DEFLA) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\gzio.c
DEP_CPP_GZIO_=\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\gzio.obj" : $(SOURCE) $(DEP_CPP_GZIO_) "$(INTDIR)"
"$(INTDIR)\gzio.sbr" : $(SOURCE) $(DEP_CPP_GZIO_) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\gzio.obj" : $(SOURCE) $(DEP_CPP_GZIO_) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\infblock.c
DEP_CPP_INFBL=\
".\infblock.h"\
".\infcodes.h"\
".\inftrees.h"\
".\infutil.h"\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\infblock.obj" : $(SOURCE) $(DEP_CPP_INFBL) "$(INTDIR)"
"$(INTDIR)\infblock.sbr" : $(SOURCE) $(DEP_CPP_INFBL) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\infblock.obj" : $(SOURCE) $(DEP_CPP_INFBL) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\infcodes.c
DEP_CPP_INFCO=\
".\infblock.h"\
".\infcodes.h"\
".\inffast.h"\
".\inftrees.h"\
".\infutil.h"\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\infcodes.obj" : $(SOURCE) $(DEP_CPP_INFCO) "$(INTDIR)"
"$(INTDIR)\infcodes.sbr" : $(SOURCE) $(DEP_CPP_INFCO) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\infcodes.obj" : $(SOURCE) $(DEP_CPP_INFCO) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\inffast.c
DEP_CPP_INFFA=\
".\infblock.h"\
".\infcodes.h"\
".\inffast.h"\
".\inftrees.h"\
".\infutil.h"\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\inffast.obj" : $(SOURCE) $(DEP_CPP_INFFA) "$(INTDIR)"
"$(INTDIR)\inffast.sbr" : $(SOURCE) $(DEP_CPP_INFFA) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\inffast.obj" : $(SOURCE) $(DEP_CPP_INFFA) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\inflate.c
DEP_CPP_INFLA=\
".\infblock.h"\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\inflate.obj" : $(SOURCE) $(DEP_CPP_INFLA) "$(INTDIR)"
"$(INTDIR)\inflate.sbr" : $(SOURCE) $(DEP_CPP_INFLA) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\inflate.obj" : $(SOURCE) $(DEP_CPP_INFLA) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\inftrees.c
DEP_CPP_INFTR=\
".\inftrees.h"\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\inftrees.obj" : $(SOURCE) $(DEP_CPP_INFTR) "$(INTDIR)"
"$(INTDIR)\inftrees.sbr" : $(SOURCE) $(DEP_CPP_INFTR) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\inftrees.obj" : $(SOURCE) $(DEP_CPP_INFTR) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\infutil.c
DEP_CPP_INFUT=\
".\infblock.h"\
".\infcodes.h"\
".\inftrees.h"\
".\infutil.h"\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\infutil.obj" : $(SOURCE) $(DEP_CPP_INFUT) "$(INTDIR)"
"$(INTDIR)\infutil.sbr" : $(SOURCE) $(DEP_CPP_INFUT) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\infutil.obj" : $(SOURCE) $(DEP_CPP_INFUT) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\trees.c
DEP_CPP_TREES=\
".\deflate.h"\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\trees.obj" : $(SOURCE) $(DEP_CPP_TREES) "$(INTDIR)"
"$(INTDIR)\trees.sbr" : $(SOURCE) $(DEP_CPP_TREES) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\trees.obj" : $(SOURCE) $(DEP_CPP_TREES) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\uncompr.c
!IF "$(CFG)" == "zlibvc - Win32 Release"
DEP_CPP_UNCOM=\
".\zconf.h"\
".\zlib.h"\
"$(INTDIR)\uncompr.obj" : $(SOURCE) $(DEP_CPP_UNCOM) "$(INTDIR)"
"$(INTDIR)\uncompr.sbr" : $(SOURCE) $(DEP_CPP_UNCOM) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
DEP_CPP_UNCOM=\
".\zconf.h"\
".\zlib.h"\
NODEP_CPP_UNCOM=\
".\uncompress"\
"$(INTDIR)\uncompr.obj" : $(SOURCE) $(DEP_CPP_UNCOM) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\zutil.c
DEP_CPP_ZUTIL=\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
!IF "$(CFG)" == "zlibvc - Win32 Release"
"$(INTDIR)\zutil.obj" : $(SOURCE) $(DEP_CPP_ZUTIL) "$(INTDIR)"
"$(INTDIR)\zutil.sbr" : $(SOURCE) $(DEP_CPP_ZUTIL) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
"$(INTDIR)\zutil.obj" : $(SOURCE) $(DEP_CPP_ZUTIL) "$(INTDIR)"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\zlib.rc
"$(INTDIR)\zlib.res" : $(SOURCE) "$(INTDIR)"
$(RSC) $(RSC_PROJ) $(SOURCE)
# End Source File
################################################################################
# Begin Source File
SOURCE=.\zlib.def
!IF "$(CFG)" == "zlibvc - Win32 Release"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\GVMAT32.obj
!IF "$(CFG)" == "zlibvc - Win32 Release"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
!ENDIF
# End Source File
################################################################################
# Begin Source File
SOURCE=.\gvmat32c.c
!IF "$(CFG)" == "zlibvc - Win32 Release"
DEP_CPP_GVMAT=\
".\deflate.h"\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
"$(INTDIR)\gvmat32c.obj" : $(SOURCE) $(DEP_CPP_GVMAT) "$(INTDIR)"
"$(INTDIR)\gvmat32c.sbr" : $(SOURCE) $(DEP_CPP_GVMAT) "$(INTDIR)"
!ELSEIF "$(CFG)" == "zlibvc - Win32 Debug"
DEP_CPP_GVMAT=\
".\deflate.h"\
".\zconf.h"\
".\zlib.h"\
".\zutil.h"\
"$(INTDIR)\gvmat32c.obj" : $(SOURCE) $(DEP_CPP_GVMAT) "$(INTDIR)"
!ENDIF
# End Source File
# End Target
# End Project
################################################################################

24
contrib/iostream/test.cpp Normal file
View File

@@ -0,0 +1,24 @@
#include "zfstream.h"
int main() {
// Construct a stream object with this filebuffer. Anything sent
// to this stream will go to standard out.
gzofstream os( 1, ios::out );
// This text is getting compressed and sent to stdout.
// To prove this, run 'test | zcat'.
os << "Hello, Mommy" << endl;
os << setcompressionlevel( Z_NO_COMPRESSION );
os << "hello, hello, hi, ho!" << endl;
setcompressionlevel( os, Z_DEFAULT_COMPRESSION )
<< "I'm compressing again" << endl;
os.close();
return 0;
}

View File

@@ -0,0 +1,329 @@
#include <memory.h>
#include "zfstream.h"
gzfilebuf::gzfilebuf() :
file(NULL),
mode(0),
own_file_descriptor(0)
{ }
gzfilebuf::~gzfilebuf() {
sync();
if ( own_file_descriptor )
close();
}
gzfilebuf *gzfilebuf::open( const char *name,
int io_mode ) {
if ( is_open() )
return NULL;
char char_mode[10];
char *p;
memset(char_mode,'\0',10);
p = char_mode;
if ( io_mode & ios::in ) {
mode = ios::in;
*p++ = 'r';
} else if ( io_mode & ios::app ) {
mode = ios::app;
*p++ = 'a';
} else {
mode = ios::out;
*p++ = 'w';
}
if ( io_mode & ios::binary ) {
mode |= ios::binary;
*p++ = 'b';
}
// Hard code the compression level
if ( io_mode & (ios::out|ios::app )) {
*p++ = '9';
}
if ( (file = gzopen(name, char_mode)) == NULL )
return NULL;
own_file_descriptor = 1;
return this;
}
gzfilebuf *gzfilebuf::attach( int file_descriptor,
int io_mode ) {
if ( is_open() )
return NULL;
char char_mode[10];
char *p;
memset(char_mode,'\0',10);
p = char_mode;
if ( io_mode & ios::in ) {
mode = ios::in;
*p++ = 'r';
} else if ( io_mode & ios::app ) {
mode = ios::app;
*p++ = 'a';
} else {
mode = ios::out;
*p++ = 'w';
}
if ( io_mode & ios::binary ) {
mode |= ios::binary;
*p++ = 'b';
}
// Hard code the compression level
if ( io_mode & (ios::out|ios::app )) {
*p++ = '9';
}
if ( (file = gzdopen(file_descriptor, char_mode)) == NULL )
return NULL;
own_file_descriptor = 0;
return this;
}
gzfilebuf *gzfilebuf::close() {
if ( is_open() ) {
sync();
gzclose( file );
file = NULL;
}
return this;
}
int gzfilebuf::setcompressionlevel( short comp_level ) {
return gzsetparams(file, comp_level, -2);
}
int gzfilebuf::setcompressionstrategy( short comp_strategy ) {
return gzsetparams(file, -2, comp_strategy);
}
streampos gzfilebuf::seekoff( streamoff off, ios::seek_dir dir, int which ) {
return streampos(EOF);
}
int gzfilebuf::underflow() {
// If the file hasn't been opened for reading, error.
if ( !is_open() || !(mode & ios::in) )
return EOF;
// if a buffer doesn't exists, allocate one.
if ( !base() ) {
if ( (allocate()) == EOF )
return EOF;
setp(0,0);
} else {
if ( in_avail() )
return (unsigned char) *gptr();
if ( out_waiting() ) {
if ( flushbuf() == EOF )
return EOF;
}
}
// Attempt to fill the buffer.
int result = fillbuf();
if ( result == EOF ) {
// disable get area
setg(0,0,0);
return EOF;
}
return (unsigned char) *gptr();
}
int gzfilebuf::overflow( int c ) {
if ( !is_open() || !(mode & ios::out) )
return EOF;
if ( !base() ) {
if ( allocate() == EOF )
return EOF;
setg(0,0,0);
} else {
if (in_avail()) {
return EOF;
}
if (out_waiting()) {
if (flushbuf() == EOF)
return EOF;
}
}
int bl = blen();
setp( base(), base() + bl);
if ( c != EOF ) {
*pptr() = c;
pbump(1);
}
return 0;
}
int gzfilebuf::sync() {
if ( !is_open() )
return EOF;
if ( out_waiting() )
return flushbuf();
return 0;
}
int gzfilebuf::flushbuf() {
int n;
char *q;
q = pbase();
n = pptr() - q;
if ( gzwrite( file, q, n) < n )
return EOF;
setp(0,0);
return 0;
}
int gzfilebuf::fillbuf() {
int required;
char *p;
p = base();
required = blen();
int t = gzread( file, p, required );
if ( t <= 0) return EOF;
setg( base(), base(), base()+t);
return t;
}
gzfilestream_common::gzfilestream_common() :
ios( gzfilestream_common::rdbuf() )
{ }
gzfilestream_common::~gzfilestream_common()
{ }
void gzfilestream_common::attach( int fd, int io_mode ) {
if ( !buffer.attach( fd, io_mode) )
clear( ios::failbit | ios::badbit );
else
clear();
}
void gzfilestream_common::open( const char *name, int io_mode ) {
if ( !buffer.open( name, io_mode ) )
clear( ios::failbit | ios::badbit );
else
clear();
}
void gzfilestream_common::close() {
if ( !buffer.close() )
clear( ios::failbit | ios::badbit );
}
gzfilebuf *gzfilestream_common::rdbuf() {
return &buffer;
}
gzifstream::gzifstream() :
ios( gzfilestream_common::rdbuf() )
{
clear( ios::badbit );
}
gzifstream::gzifstream( const char *name, int io_mode ) :
ios( gzfilestream_common::rdbuf() )
{
gzfilestream_common::open( name, io_mode );
}
gzifstream::gzifstream( int fd, int io_mode ) :
ios( gzfilestream_common::rdbuf() )
{
gzfilestream_common::attach( fd, io_mode );
}
gzifstream::~gzifstream() { }
gzofstream::gzofstream() :
ios( gzfilestream_common::rdbuf() )
{
clear( ios::badbit );
}
gzofstream::gzofstream( const char *name, int io_mode ) :
ios( gzfilestream_common::rdbuf() )
{
gzfilestream_common::open( name, io_mode );
}
gzofstream::gzofstream( int fd, int io_mode ) :
ios( gzfilestream_common::rdbuf() )
{
gzfilestream_common::attach( fd, io_mode );
}
gzofstream::~gzofstream() { }

142
contrib/iostream/zfstream.h Normal file
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#ifndef _zfstream_h
#define _zfstream_h
#include <fstream.h>
#include "zlib.h"
class gzfilebuf : public streambuf {
public:
gzfilebuf( );
virtual ~gzfilebuf();
gzfilebuf *open( const char *name, int io_mode );
gzfilebuf *attach( int file_descriptor, int io_mode );
gzfilebuf *close();
int setcompressionlevel( short comp_level );
int setcompressionstrategy( short comp_strategy );
inline int is_open() const { return (file !=NULL); }
virtual streampos seekoff( streamoff, ios::seek_dir, int );
virtual int sync();
protected:
virtual int underflow();
virtual int overflow( int = EOF );
private:
gzFile file;
short mode;
short own_file_descriptor;
int flushbuf();
int fillbuf();
};
class gzfilestream_common : virtual public ios {
friend class gzifstream;
friend class gzofstream;
friend gzofstream &setcompressionlevel( gzofstream &, int );
friend gzofstream &setcompressionstrategy( gzofstream &, int );
public:
virtual ~gzfilestream_common();
void attach( int fd, int io_mode );
void open( const char *name, int io_mode );
void close();
protected:
gzfilestream_common();
private:
gzfilebuf *rdbuf();
gzfilebuf buffer;
};
class gzifstream : public gzfilestream_common, public istream {
public:
gzifstream();
gzifstream( const char *name, int io_mode = ios::in );
gzifstream( int fd, int io_mode = ios::in );
virtual ~gzifstream();
};
class gzofstream : public gzfilestream_common, public ostream {
public:
gzofstream();
gzofstream( const char *name, int io_mode = ios::out );
gzofstream( int fd, int io_mode = ios::out );
virtual ~gzofstream();
};
template<class T> class gzomanip {
friend gzofstream &operator<<(gzofstream &, const gzomanip<T> &);
public:
gzomanip(gzofstream &(*f)(gzofstream &, T), T v) : func(f), val(v) { }
private:
gzofstream &(*func)(gzofstream &, T);
T val;
};
template<class T> gzofstream &operator<<(gzofstream &s,
const gzomanip<T> &m) {
return (*m.func)(s, m.val);
}
inline gzofstream &setcompressionlevel( gzofstream &s, int l ) {
(s.rdbuf())->setcompressionlevel(l);
return s;
}
inline gzofstream &setcompressionstrategy( gzofstream &s, int l ) {
(s.rdbuf())->setcompressionstrategy(l);
return s;
}
inline gzomanip<int> setcompressionlevel(int l)
{
return gzomanip<int>(&setcompressionlevel,l);
}
inline gzomanip<int> setcompressionstrategy(int l)
{
return gzomanip<int>(&setcompressionstrategy,l);
}
#endif

307
contrib/iostream2/zstream.h Normal file
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/*
*
* Copyright (c) 1997
* Christian Michelsen Research AS
* Advanced Computing
* Fantoftvegen 38, 5036 BERGEN, Norway
* http://www.cmr.no
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Christian Michelsen Research AS makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*/
#ifndef ZSTREAM__H
#define ZSTREAM__H
/*
* zstream.h - C++ interface to the 'zlib' general purpose compression library
* $Id: zstream.h 1.1 1997-06-25 12:00:56+02 tyge Exp tyge $
*/
#include <strstream.h>
#include <string.h>
#include <stdio.h>
#include "zlib.h"
#if defined(_WIN32)
# include <fcntl.h>
# include <io.h>
# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
#else
# define SET_BINARY_MODE(file)
#endif
class zstringlen {
public:
zstringlen(class izstream&);
zstringlen(class ozstream&, const char*);
size_t value() const { return val.word; }
private:
struct Val { unsigned char byte; size_t word; } val;
};
// ----------------------------- izstream -----------------------------
class izstream
{
public:
izstream() : m_fp(0) {}
izstream(FILE* fp) : m_fp(0) { open(fp); }
izstream(const char* name) : m_fp(0) { open(name); }
~izstream() { close(); }
/* Opens a gzip (.gz) file for reading.
* open() can be used to read a file which is not in gzip format;
* in this case read() will directly read from the file without
* decompression. errno can be checked to distinguish two error
* cases (if errno is zero, the zlib error is Z_MEM_ERROR).
*/
void open(const char* name) {
if (m_fp) close();
m_fp = ::gzopen(name, "rb");
}
void open(FILE* fp) {
SET_BINARY_MODE(fp);
if (m_fp) close();
m_fp = ::gzdopen(fileno(fp), "rb");
}
/* Flushes all pending input if necessary, closes the compressed file
* and deallocates all the (de)compression state. The return value is
* the zlib error number (see function error() below).
*/
int close() {
int r = ::gzclose(m_fp);
m_fp = 0; return r;
}
/* Binary read the given number of bytes from the compressed file.
*/
int read(void* buf, size_t len) {
return ::gzread(m_fp, buf, len);
}
/* Returns the error message for the last error which occurred on the
* given compressed file. errnum is set to zlib error number. If an
* error occurred in the file system and not in the compression library,
* errnum is set to Z_ERRNO and the application may consult errno
* to get the exact error code.
*/
const char* error(int* errnum) {
return ::gzerror(m_fp, errnum);
}
gzFile fp() { return m_fp; }
private:
gzFile m_fp;
};
/*
* Binary read the given (array of) object(s) from the compressed file.
* If the input file was not in gzip format, read() copies the objects number
* of bytes into the buffer.
* returns the number of uncompressed bytes actually read
* (0 for end of file, -1 for error).
*/
template <class T, class Items>
inline int read(izstream& zs, T* x, Items items) {
return ::gzread(zs.fp(), x, items*sizeof(T));
}
/*
* Binary input with the '>' operator.
*/
template <class T>
inline izstream& operator>(izstream& zs, T& x) {
::gzread(zs.fp(), &x, sizeof(T));
return zs;
}
inline zstringlen::zstringlen(izstream& zs) {
zs > val.byte;
if (val.byte == 255) zs > val.word;
else val.word = val.byte;
}
/*
* Read length of string + the string with the '>' operator.
*/
inline izstream& operator>(izstream& zs, char* x) {
zstringlen len(zs);
::gzread(zs.fp(), x, len.value());
x[len.value()] = '\0';
return zs;
}
inline char* read_string(izstream& zs) {
zstringlen len(zs);
char* x = new char[len.value()+1];
::gzread(zs.fp(), x, len.value());
x[len.value()] = '\0';
return x;
}
// ----------------------------- ozstream -----------------------------
class ozstream
{
public:
ozstream() : m_fp(0), m_os(0) {
}
ozstream(FILE* fp, int level = Z_DEFAULT_COMPRESSION)
: m_fp(0), m_os(0) {
open(fp, level);
}
ozstream(const char* name, int level = Z_DEFAULT_COMPRESSION)
: m_fp(0), m_os(0) {
open(name, level);
}
~ozstream() {
close();
}
/* Opens a gzip (.gz) file for writing.
* The compression level parameter should be in 0..9
* errno can be checked to distinguish two error cases
* (if errno is zero, the zlib error is Z_MEM_ERROR).
*/
void open(const char* name, int level = Z_DEFAULT_COMPRESSION) {
char mode[4] = "wb\0";
if (level != Z_DEFAULT_COMPRESSION) mode[2] = '0'+level;
if (m_fp) close();
m_fp = ::gzopen(name, mode);
}
/* open from a FILE pointer.
*/
void open(FILE* fp, int level = Z_DEFAULT_COMPRESSION) {
SET_BINARY_MODE(fp);
char mode[4] = "wb\0";
if (level != Z_DEFAULT_COMPRESSION) mode[2] = '0'+level;
if (m_fp) close();
m_fp = ::gzdopen(fileno(fp), mode);
}
/* Flushes all pending output if necessary, closes the compressed file
* and deallocates all the (de)compression state. The return value is
* the zlib error number (see function error() below).
*/
int close() {
if (m_os) {
::gzwrite(m_fp, m_os->str(), m_os->pcount());
delete[] m_os->str(); delete m_os; m_os = 0;
}
int r = ::gzclose(m_fp); m_fp = 0; return r;
}
/* Binary write the given number of bytes into the compressed file.
*/
int write(const void* buf, size_t len) {
return ::gzwrite(m_fp, (voidp) buf, len);
}
/* Flushes all pending output into the compressed file. The parameter
* _flush is as in the deflate() function. The return value is the zlib
* error number (see function gzerror below). flush() returns Z_OK if
* the flush_ parameter is Z_FINISH and all output could be flushed.
* flush() should be called only when strictly necessary because it can
* degrade compression.
*/
int flush(int _flush) {
os_flush();
return ::gzflush(m_fp, _flush);
}
/* Returns the error message for the last error which occurred on the
* given compressed file. errnum is set to zlib error number. If an
* error occurred in the file system and not in the compression library,
* errnum is set to Z_ERRNO and the application may consult errno
* to get the exact error code.
*/
const char* error(int* errnum) {
return ::gzerror(m_fp, errnum);
}
gzFile fp() { return m_fp; }
ostream& os() {
if (m_os == 0) m_os = new ostrstream;
return *m_os;
}
void os_flush() {
if (m_os && m_os->pcount()>0) {
ostrstream* oss = new ostrstream;
oss->fill(m_os->fill());
oss->flags(m_os->flags());
oss->precision(m_os->precision());
oss->width(m_os->width());
::gzwrite(m_fp, m_os->str(), m_os->pcount());
delete[] m_os->str(); delete m_os; m_os = oss;
}
}
private:
gzFile m_fp;
ostrstream* m_os;
};
/*
* Binary write the given (array of) object(s) into the compressed file.
* returns the number of uncompressed bytes actually written
* (0 in case of error).
*/
template <class T, class Items>
inline int write(ozstream& zs, const T* x, Items items) {
return ::gzwrite(zs.fp(), (voidp) x, items*sizeof(T));
}
/*
* Binary output with the '<' operator.
*/
template <class T>
inline ozstream& operator<(ozstream& zs, const T& x) {
::gzwrite(zs.fp(), (voidp) &x, sizeof(T));
return zs;
}
inline zstringlen::zstringlen(ozstream& zs, const char* x) {
val.byte = 255; val.word = ::strlen(x);
if (val.word < 255) zs < (val.byte = val.word);
else zs < val;
}
/*
* Write length of string + the string with the '<' operator.
*/
inline ozstream& operator<(ozstream& zs, const char* x) {
zstringlen len(zs, x);
::gzwrite(zs.fp(), (voidp) x, len.value());
return zs;
}
#ifdef _MSC_VER
inline ozstream& operator<(ozstream& zs, char* const& x) {
return zs < (const char*) x;
}
#endif
/*
* Ascii write with the << operator;
*/
template <class T>
inline ostream& operator<<(ozstream& zs, const T& x) {
zs.os_flush();
return zs.os() << x;
}
#endif

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#include "zstream.h"
#include <math.h>
#include <stdlib.h>
#include <iomanip.h>
void main() {
char h[256] = "Hello";
char* g = "Goodbye";
ozstream out("temp.gz");
out < "This works well" < h < g;
out.close();
izstream in("temp.gz"); // read it back
char *x = read_string(in), *y = new char[256], z[256];
in > y > z;
in.close();
cout << x << endl << y << endl << z << endl;
out.open("temp.gz"); // try ascii output; zcat temp.gz to see the results
out << setw(50) << setfill('#') << setprecision(20) << x << endl << y << endl << z << endl;
out << z << endl << y << endl << x << endl;
out << 1.1234567890123456789 << endl;
delete[] x; delete[] y;
}

14
contrib/untgz/Makefile Normal file
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CC=cc
CFLAGS=-g
untgz: untgz.o ../../libz.a
$(CC) $(CFLAGS) -o untgz untgz.o -L../.. -lz
untgz.o: untgz.c ../../zlib.h
$(CC) $(CFLAGS) -c -I../.. untgz.c
../../libz.a:
cd ../..; make
clean:
rm -f untgz untgz.o *~

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# Makefile for zlib. Modified for mingw32
# For conditions of distribution and use, see copyright notice in zlib.h
# To compile,
#
# make -fmakefile.w32
#
CC=gcc
# Generate dependencies (see end of the file)
CPPFLAGS=-MMD
#CFLAGS=-MMD -O
#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
#CFLAGS=-MMD -g -DDEBUG
CFLAGS=-O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
-Wstrict-prototypes -Wmissing-prototypes
# If cp.exe is not found, replace with copy /Y .
CP=cp -f
# The default value of RM is "rm -f."
# If "rm.exe" is not found, uncomment:
# RM=del
LD=gcc
LDLIBS=-L. -lz
LDFLAGS=-s
INCL=zlib.h zconf.h
LIBS=libz.a
AR=ar rcs
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 = minigzip.o untgz.o
all: minigzip.exe untgz.exe
rebuild: clean all
libz.a: $(OBJS)
$(AR) $@ $(OBJS)
%.exe : %.o $(LIBS)
$(LD) $(LDFLAGS) -o $@ $< $(LDLIBS)
.PHONY : clean
clean:
$(RM) *.d *.o *.exe libz.a foo.gz
DEPS := $(wildcard *.d)
ifneq ($(DEPS),)
include $(DEPS)
endif

478
contrib/untgz/untgz.c Normal file
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/*
* untgz.c -- Display contents and/or extract file from
* a gzip'd TAR file
* written by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
* adaptation to Unix by Jean-loup Gailly <jloup@gzip.org>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <utime.h>
#include <errno.h>
#include <fcntl.h>
#ifdef unix
# include <unistd.h>
#else
# include <direct.h>
# include <io.h>
#endif
#include "zlib.h"
/* Values used in typeflag field. */
#define REGTYPE '0' /* regular file */
#define AREGTYPE '\0' /* regular file */
#define LNKTYPE '1' /* link */
#define SYMTYPE '2' /* reserved */
#define CHRTYPE '3' /* character special */
#define BLKTYPE '4' /* block special */
#define DIRTYPE '5' /* directory */
#define FIFOTYPE '6' /* FIFO special */
#define CONTTYPE '7' /* reserved */
#define BLOCKSIZE 512
struct tar_header
{ /* byte offset */
char name[100]; /* 0 */
char mode[8]; /* 100 */
char uid[8]; /* 108 */
char gid[8]; /* 116 */
char size[12]; /* 124 */
char mtime[12]; /* 136 */
char chksum[8]; /* 148 */
char typeflag; /* 156 */
char linkname[100]; /* 157 */
char magic[6]; /* 257 */
char version[2]; /* 263 */
char uname[32]; /* 265 */
char gname[32]; /* 297 */
char devmajor[8]; /* 329 */
char devminor[8]; /* 337 */
char prefix[155]; /* 345 */
/* 500 */
};
union tar_buffer {
char buffer[BLOCKSIZE];
struct tar_header header;
};
enum { TGZ_EXTRACT = 0, TGZ_LIST };
static char *TGZfname OF((const char *));
void TGZnotfound OF((const char *));
int getoct OF((char *, int));
char *strtime OF((time_t *));
int ExprMatch OF((char *,char *));
int makedir OF((char *));
int matchname OF((int,int,char **,char *));
void error OF((const char *));
int tar OF((gzFile, int, int, int, char **));
void help OF((int));
int main OF((int, char **));
char *prog;
/* This will give a benign warning */
static char *TGZprefix[] = { "\0", ".tgz", ".tar.gz", NULL };
/* Return the real name of the TGZ archive */
/* or NULL if it does not exist. */
static char *TGZfname OF((const char *fname))
{
static char buffer[1024];
int origlen,i;
strcpy(buffer,fname);
origlen = strlen(buffer);
for (i=0; TGZprefix[i]; i++)
{
strcpy(buffer+origlen,TGZprefix[i]);
if (access(buffer,F_OK) == 0)
return buffer;
}
return NULL;
}
/* error message for the filename */
void TGZnotfound OF((const char *fname))
{
int i;
fprintf(stderr,"%s : couldn't find ",prog);
for (i=0;TGZprefix[i];i++)
fprintf(stderr,(TGZprefix[i+1]) ? "%s%s, " : "or %s%s\n",
fname,
TGZprefix[i]);
exit(1);
}
/* help functions */
int getoct(char *p,int width)
{
int result = 0;
char c;
while (width --)
{
c = *p++;
if (c == ' ')
continue;
if (c == 0)
break;
result = result * 8 + (c - '0');
}
return result;
}
char *strtime (time_t *t)
{
struct tm *local;
static char result[32];
local = localtime(t);
sprintf(result,"%2d/%02d/%4d %02d:%02d:%02d",
local->tm_mday, local->tm_mon+1, local->tm_year+1900,
local->tm_hour, local->tm_min, local->tm_sec);
return result;
}
/* regular expression matching */
#define ISSPECIAL(c) (((c) == '*') || ((c) == '/'))
int ExprMatch(char *string,char *expr)
{
while (1)
{
if (ISSPECIAL(*expr))
{
if (*expr == '/')
{
if (*string != '\\' && *string != '/')
return 0;
string ++; expr++;
}
else if (*expr == '*')
{
if (*expr ++ == 0)
return 1;
while (*++string != *expr)
if (*string == 0)
return 0;
}
}
else
{
if (*string != *expr)
return 0;
if (*expr++ == 0)
return 1;
string++;
}
}
}
/* recursive make directory */
/* abort if you get an ENOENT errno somewhere in the middle */
/* e.g. ignore error "mkdir on existing directory" */
/* */
/* return 1 if OK */
/* 0 on error */
int makedir (char *newdir)
{
char *buffer = strdup(newdir);
char *p;
int len = strlen(buffer);
if (len <= 0) {
free(buffer);
return 0;
}
if (buffer[len-1] == '/') {
buffer[len-1] = '\0';
}
if (mkdir(buffer, 0775) == 0)
{
free(buffer);
return 1;
}
p = buffer+1;
while (1)
{
char hold;
while(*p && *p != '\\' && *p != '/')
p++;
hold = *p;
*p = 0;
if ((mkdir(buffer, 0775) == -1) && (errno == ENOENT))
{
fprintf(stderr,"%s: couldn't create directory %s\n",prog,buffer);
free(buffer);
return 0;
}
if (hold == 0)
break;
*p++ = hold;
}
free(buffer);
return 1;
}
int matchname (int arg,int argc,char **argv,char *fname)
{
if (arg == argc) /* no arguments given (untgz tgzarchive) */
return 1;
while (arg < argc)
if (ExprMatch(fname,argv[arg++]))
return 1;
return 0; /* ignore this for the moment being */
}
/* Tar file list or extract */
int tar (gzFile in,int action,int arg,int argc,char **argv)
{
union tar_buffer buffer;
int len;
int err;
int getheader = 1;
int remaining = 0;
FILE *outfile = NULL;
char fname[BLOCKSIZE];
time_t tartime;
if (action == TGZ_LIST)
printf(" day time size file\n"
" ---------- -------- --------- -------------------------------------\n");
while (1)
{
len = gzread(in, &buffer, BLOCKSIZE);
if (len < 0)
error (gzerror(in, &err));
/*
* if we met the end of the tar
* or the end-of-tar block,
* we are done
*/
if ((len == 0) || (buffer.header.name[0]== 0))
break;
/*
* Always expect complete blocks to process
* the tar information.
*/
if (len != BLOCKSIZE)
error("gzread: incomplete block read");
/*
* If we have to get a tar header
*/
if (getheader == 1)
{
tartime = (time_t)getoct(buffer.header.mtime,12);
strcpy(fname,buffer.header.name);
switch (buffer.header.typeflag)
{
case DIRTYPE:
if (action == TGZ_LIST)
printf(" %s <dir> %s\n",strtime(&tartime),fname);
if (action == TGZ_EXTRACT)
makedir(fname);
break;
case REGTYPE:
case AREGTYPE:
remaining = getoct(buffer.header.size,12);
if (action == TGZ_LIST)
printf(" %s %9d %s\n",strtime(&tartime),remaining,fname);
if (action == TGZ_EXTRACT)
{
if ((remaining) && (matchname(arg,argc,argv,fname)))
{
outfile = fopen(fname,"wb");
if (outfile == NULL) {
/* try creating directory */
char *p = strrchr(fname, '/');
if (p != NULL) {
*p = '\0';
makedir(fname);
*p = '/';
outfile = fopen(fname,"wb");
}
}
fprintf(stderr,
"%s %s\n",
(outfile) ? "Extracting" : "Couldn't create",
fname);
}
else
outfile = NULL;
}
/*
* could have no contents
*/
getheader = (remaining) ? 0 : 1;
break;
default:
if (action == TGZ_LIST)
printf(" %s <---> %s\n",strtime(&tartime),fname);
break;
}
}
else
{
unsigned int bytes = (remaining > BLOCKSIZE) ? BLOCKSIZE : remaining;
if ((action == TGZ_EXTRACT) && (outfile != NULL))
{
if (fwrite(&buffer,sizeof(char),bytes,outfile) != bytes)
{
fprintf(stderr,"%s : error writing %s skipping...\n",prog,fname);
fclose(outfile);
unlink(fname);
}
}
remaining -= bytes;
if (remaining == 0)
{
getheader = 1;
if ((action == TGZ_EXTRACT) && (outfile != NULL))
{
struct utimbuf settime;
settime.actime = settime.modtime = tartime;
fclose(outfile);
outfile = NULL;
utime(fname,&settime);
}
}
}
}
if (gzclose(in) != Z_OK)
error("failed gzclose");
return 0;
}
/* =========================================================== */
void help(int exitval)
{
fprintf(stderr,
"untgz v 0.1\n"
" an sample application of zlib 1.0.4\n\n"
"Usage : untgz TGZfile to extract all files\n"
" untgz TGZfile fname ... to extract selected files\n"
" untgz -l TGZfile to list archive contents\n"
" untgz -h to display this help\n\n");
exit(exitval);
}
void error(const char *msg)
{
fprintf(stderr, "%s: %s\n", prog, msg);
exit(1);
}
/* ====================================================================== */
int _CRT_glob = 0; /* disable globbing of the arguments */
int main(int argc,char **argv)
{
int action = TGZ_EXTRACT;
int arg = 1;
char *TGZfile;
gzFile *f;
prog = strrchr(argv[0],'\\');
if (prog == NULL)
{
prog = strrchr(argv[0],'/');
if (prog == NULL)
{
prog = strrchr(argv[0],':');
if (prog == NULL)
prog = argv[0];
else
prog++;
}
else
prog++;
}
else
prog++;
if (argc == 1)
help(0);
if (strcmp(argv[arg],"-l") == 0)
{
action = TGZ_LIST;
if (argc == ++arg)
help(0);
}
else if (strcmp(argv[arg],"-h") == 0)
{
help(0);
}
if ((TGZfile = TGZfname(argv[arg])) == NULL)
TGZnotfound(argv[arg]);
++arg;
if ((action == TGZ_LIST) && (arg != argc))
help(1);
/*
* Process the TGZ file
*/
switch(action)
{
case TGZ_LIST:
case TGZ_EXTRACT:
f = gzopen(TGZfile,"rb");
if (f == NULL)
{
fprintf(stderr,"%s: Couldn't gzopen %s\n",
prog,
TGZfile);
return 1;
}
exit(tar(f, action, arg, argc, argv));
break;
default:
error("Unknown option!");
exit(1);
}
return 0;
}

57
contrib/visual-basic.txt Normal file
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@@ -0,0 +1,57 @@
From: "Jon Caruana" <jon-net@usa.net>
To: "Jean-loup Gailly" <gzip@prep.ai.mit.edu>
Subject: Re: How to port zlib declares to vb?
Date: Mon, 28 Oct 1996 18:33:03 -0600
Got the answer! (I haven't had time to check this but it's what I got, and
looks correct):
He has the following routines working:
compress
uncompress
gzopen
gzwrite
gzread
gzclose
Declares follow: (Quoted from Carlos Rios <c_rios@sonda.cl>, in Vb4 form)
#If Win16 Then 'Use Win16 calls.
Declare Function compress Lib "ZLIB.DLL" (ByVal compr As
String, comprLen As Any, ByVal buf As String, ByVal buflen
As Long) As Integer
Declare Function uncompress Lib "ZLIB.DLL" (ByVal uncompr
As String, uncomprLen As Any, ByVal compr As String, ByVal
lcompr As Long) As Integer
Declare Function gzopen Lib "ZLIB.DLL" (ByVal filePath As
String, ByVal mode As String) As Long
Declare Function gzread Lib "ZLIB.DLL" (ByVal file As
Long, ByVal uncompr As String, ByVal uncomprLen As Integer)
As Integer
Declare Function gzwrite Lib "ZLIB.DLL" (ByVal file As
Long, ByVal uncompr As String, ByVal uncomprLen As Integer)
As Integer
Declare Function gzclose Lib "ZLIB.DLL" (ByVal file As
Long) As Integer
#Else
Declare Function compress Lib "ZLIB32.DLL"
(ByVal compr As String, comprLen As Any, ByVal buf As
String, ByVal buflen As Long) As Integer
Declare Function uncompress Lib "ZLIB32.DLL"
(ByVal uncompr As String, uncomprLen As Any, ByVal compr As
String, ByVal lcompr As Long) As Long
Declare Function gzopen Lib "ZLIB32.DLL"
(ByVal file As String, ByVal mode As String) As Long
Declare Function gzread Lib "ZLIB32.DLL"
(ByVal file As Long, ByVal uncompr As String, ByVal
uncomprLen As Long) As Long
Declare Function gzwrite Lib "ZLIB32.DLL"
(ByVal file As Long, ByVal uncompr As String, ByVal
uncomprLen As Long) As Long
Declare Function gzclose Lib "ZLIB32.DLL"
(ByVal file As Long) As Long
#End If
-Jon Caruana
jon-net@usa.net
Microsoft Sitebuilder Network Level 1 Member - HTML Writer's Guild Member