README:  Tcl
    This is the Tcl 8.6a1 source distribution.
    This is the Tcl 8.6b1 source distribution.
    Tcl/Tk is also available through NetCVS:
	http://tcl.sourceforge.net/
    You can get any source release of Tcl from the file distributions
    link at the above URL.

RCS: @(#) $Id: README,v 1.69 2008/06/19 15:37:02 dgp Exp $

 *
 * RCS: @(#) $Id: dirent2.h,v 1.2 1998/09/14 18:39:44 stanton Exp $
 */

#ifndef _DIRENT
#define _DIRENT

#ifndef _TCL
#include <tcl.h>
#include "tcl.h"
#endif

/*
 * Dirent structure, which holds information about a single
 * directory entry.
 */

#define MAXNAMLEN 255

    char dd_buf[DIRBLKSIZ];
} DIR;

/*
 * Procedures defined for reading directories:
 */

extern void		closedir _ANSI_ARGS_((DIR *dirp));
extern DIR *		opendir _ANSI_ARGS_((char *name));
extern struct dirent *	readdir _ANSI_ARGS_((DIR *dirp));
extern void		closedir (DIR *dirp);
extern DIR *		opendir (char *name);
extern struct dirent *	readdir (DIR *dirp);

#endif /* _DIRENT */

/* 
/*
 * dlfcn.h --
 *
 *	This file provides a replacement for the header file "dlfcn.h"
 *	on systems where dlfcn.h is missing.  It's primary use is for
 *	AIX, where Tcl emulates the dl library.
 *
 *	This file is subject to the following copyright notice, which is

 * This is an unpublished work copyright (c) 1992 HELIOS Software GmbH
 * 30159 Hannover, Germany
 */

#ifndef __dlfcn_h__
#define __dlfcn_h__

#ifndef _TCL
#include <tcl.h>
#include "tcl.h"
#endif

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Mode flags for the dlopen routine.
 */
#define RTLD_LAZY	1	/* lazy function call binding */
#define RTLD_NOW	2	/* immediate function call binding */
#define RTLD_GLOBAL	0x100	/* allow symbols to be global */

/*
 * To be able to intialize, a library may provide a dl_info structure
 * that contains functions to be called to initialize and terminate.
 */
struct dl_info {
	void (*init) _ANSI_ARGS_((void));
	void (*fini) _ANSI_ARGS_((void));
	void (*init) (void);
	void (*fini) (void);
};

VOID *dlopen _ANSI_ARGS_((const char *path, int mode));
VOID *dlsym _ANSI_ARGS_((void *handle, const char *symbol));
char *dlerror _ANSI_ARGS_((void));
int dlclose _ANSI_ARGS_((void *handle));
void *dlopen (const char *path, int mode);
void *dlsym (void *handle, const char *symbol);
char *dlerror (void);
int dlclose (void *handle);

#ifdef __cplusplus
}
#endif

#endif /* __dlfcn_h__ */

/*
 * Copyright (C) 2000-2003 Damien Miller.  All rights reserved.
 * Copyright (C) 1999 WIDE Project.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Pseudo-implementation of RFC2553 name / address resolution functions
 *
 * But these functions are not implemented correctly. The minimum subset
 * is implemented for ssh use only. For example, this routine assumes
 * that ai_family is AF_INET. Don't use it for another purpose.
 */
#include "tclInt.h"

TCL_DECLARE_MUTEX(netdbMutex)

#ifndef HAVE_GETNAMEINFO
#ifndef HAVE_STRLCPY
static size_t
strlcpy(char *dst, const char *src, size_t siz)
{
        char *d = dst;
        const char *s = src;
        size_t n = siz;

        /* Copy as many bytes as will fit */
        if (n != 0 && --n != 0) {
                do {
                        if ((*d++ = *s++) == 0)
                                break;
                } while (--n != 0);
        }

        /* Not enough room in dst, add NUL and traverse rest of src */
        if (n == 0) {
                if (siz != 0)
                        *d = '\0';              /* NUL-terminate dst */
                while (*s++)
                        ;
        }

        return(s - src - 1);    /* count does not include NUL */
}
#endif

int fake_getnameinfo(const struct sockaddr *sa, size_t salen, char *host, 
                size_t hostlen, char *serv, size_t servlen, int flags)
{
	struct sockaddr_in *sin = (struct sockaddr_in *)sa;
	struct hostent *hp;
	char tmpserv[16];

	if (sa->sa_family != AF_UNSPEC && sa->sa_family != AF_INET)
		return (EAI_FAMILY);
	if (serv != NULL) {
		snprintf(tmpserv, sizeof(tmpserv), "%d", ntohs(sin->sin_port));
		if (strlcpy(serv, tmpserv, servlen) >= servlen)
			return (EAI_MEMORY);
	}

	if (host != NULL) {
		if (flags & NI_NUMERICHOST) {
			int len;
			Tcl_MutexLock(&netdbMutex);
			len = strlcpy(host, inet_ntoa(sin->sin_addr), hostlen);
			Tcl_MutexUnlock(&netdbMutex);
			if (len >= hostlen) {
				return (EAI_MEMORY);
			} else {
				return (0);
			}
		} else {
			int ret;
			Tcl_MutexLock(&netdbMutex);
			hp = gethostbyaddr((char *)&sin->sin_addr, 
			    sizeof(struct in_addr), AF_INET);
			if (hp == NULL) {
				ret = EAI_NODATA;
			} else if (strlcpy(host, hp->h_name, hostlen)
				   >= hostlen) {
				ret = EAI_MEMORY;
			} else {
				ret = 0;
			}
			Tcl_MutexUnlock(&netdbMutex);
			return ret;
		}
	}
	return (0);
}
#endif /* !HAVE_GETNAMEINFO */

#ifndef HAVE_GAI_STRERROR
const char *
fake_gai_strerror(int err)
{
	switch (err) {
	case EAI_NODATA:
		return ("no address associated with name");
	case EAI_MEMORY:
		return ("memory allocation failure.");
	case EAI_NONAME:
		return ("nodename nor servname provided, or not known");
	case EAI_FAMILY:
		return ("ai_family not supported");
	default:
		return ("unknown/invalid error.");
	}
}    
#endif /* !HAVE_GAI_STRERROR */

#ifndef HAVE_FREEADDRINFO
void
freeaddrinfo(struct addrinfo *ai)
{
	struct addrinfo *next;

	for(; ai != NULL;) {
		next = ai->ai_next;
		free(ai);
		ai = next;
	}
}
#endif /* !HAVE_FREEADDRINFO */

#ifndef HAVE_GETADDRINFO
static struct
addrinfo *malloc_ai(int port, u_long addr, const struct addrinfo *hints)
{
	struct addrinfo *ai;

	ai = malloc(sizeof(*ai) + sizeof(struct sockaddr_in));
	if (ai == NULL)
		return (NULL);
	
	memset(ai, '\0', sizeof(*ai) + sizeof(struct sockaddr_in));
	
	ai->ai_addr = (struct sockaddr *)(ai + 1);
	/* XXX -- ssh doesn't use sa_len */
	ai->ai_addrlen = sizeof(struct sockaddr_in);
	ai->ai_addr->sa_family = ai->ai_family = AF_INET;

	((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
	((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
	
	/* XXX: the following is not generally correct, but does what we want */
	if (hints->ai_socktype)
		ai->ai_socktype = hints->ai_socktype;
	else
		ai->ai_socktype = SOCK_STREAM;

	if (hints->ai_protocol)
		ai->ai_protocol = hints->ai_protocol;

	return (ai);
}

int
fake_getaddrinfo(const char *hostname, const char *servname, 
    const struct addrinfo *hints, struct addrinfo **res)
{
	struct hostent *hp;
	struct servent *sp;
	struct in_addr in;
	int i;
	long int port;
	u_long addr;

	port = 0;
	if (hints && hints->ai_family != AF_UNSPEC &&
	    hints->ai_family != AF_INET)
		return (EAI_FAMILY);
	if (servname != NULL) {
		char *cp;

		port = strtol(servname, &cp, 10);
		if (port > 0 && port <= 65535 && *cp == '\0')
			port = htons(port);
		else if ((sp = getservbyname(servname, NULL)) != NULL)
			port = sp->s_port;
		else
			port = 0;
	}

	if (hints && hints->ai_flags & AI_PASSIVE) {
		addr = htonl(0x00000000);
		if (hostname && inet_aton(hostname, &in) != 0)
			addr = in.s_addr;
		*res = malloc_ai(port, addr, hints);
		if (*res == NULL) 
			return (EAI_MEMORY);
		return (0);
	}
		
	if (!hostname) {
		*res = malloc_ai(port, htonl(0x7f000001), hints);
		if (*res == NULL) 
			return (EAI_MEMORY);
		return (0);
	}
	
	if (inet_aton(hostname, &in)) {
		*res = malloc_ai(port, in.s_addr, hints);
		if (*res == NULL) 
			return (EAI_MEMORY);
		return (0);
	}
	
	/* Don't try DNS if AI_NUMERICHOST is set */
	if (hints && hints->ai_flags & AI_NUMERICHOST)
		return (EAI_NONAME);
	
	Tcl_MutexLock(&netdbMutex);
	hp = gethostbyname(hostname);
	if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
		struct addrinfo *cur, *prev;

		cur = prev = *res = NULL;
		for (i = 0; hp->h_addr_list[i]; i++) {
			struct in_addr *in = (struct in_addr *)hp->h_addr_list[i];

			cur = malloc_ai(port, in->s_addr, hints);
			if (cur == NULL) {
				if (*res != NULL)
					freeaddrinfo(*res);
				Tcl_MutexUnlock(&netdbMutex);
				return (EAI_MEMORY);
			}
			if (prev)
				prev->ai_next = cur;
			else
				*res = cur;

			prev = cur;
		}
		Tcl_MutexUnlock(&netdbMutex);
		return (0);
	}
	Tcl_MutexUnlock(&netdbMutex);
	return (EAI_NODATA);
}
#endif /* !HAVE_GETADDRINFO */

/* $Id$ */

/*
 * Copyright (C) 2000-2003 Damien Miller.  All rights reserved.
 * Copyright (C) 1999 WIDE Project.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Pseudo-implementation of RFC2553 name / address resolution functions
 *
 * But these functions are not implemented correctly. The minimum subset
 * is implemented for ssh use only. For example, this routine assumes
 * that ai_family is AF_INET. Don't use it for another purpose.
 */

#ifndef _FAKE_RFC2553_H
#define _FAKE_RFC2553_H

/*
 * First, socket and INET6 related definitions 
 */
#ifndef HAVE_STRUCT_SOCKADDR_STORAGE
# define	_SS_MAXSIZE	128	/* Implementation specific max size */
# define       _SS_PADSIZE     (_SS_MAXSIZE - sizeof (struct sockaddr))
struct sockaddr_storage {
	struct sockaddr	ss_sa;
	char		__ss_pad2[_SS_PADSIZE];
};
# define ss_family ss_sa.sa_family
#endif /* !HAVE_STRUCT_SOCKADDR_STORAGE */

#ifndef IN6_IS_ADDR_LOOPBACK
# define IN6_IS_ADDR_LOOPBACK(a) \
	(((uint32_t *)(a))[0] == 0 && ((uint32_t *)(a))[1] == 0 && \
	 ((uint32_t *)(a))[2] == 0 && ((uint32_t *)(a))[3] == htonl(1))
#endif /* !IN6_IS_ADDR_LOOPBACK */

#ifndef HAVE_STRUCT_IN6_ADDR
struct in6_addr {
	uint8_t	s6_addr[16];
};
#endif /* !HAVE_STRUCT_IN6_ADDR */

#ifndef HAVE_STRUCT_SOCKADDR_IN6
struct sockaddr_in6 {
	unsigned short	sin6_family;
	uint16_t	sin6_port;
	uint32_t	sin6_flowinfo;
	struct in6_addr	sin6_addr;
	uint32_t	sin6_scope_id;
};
#endif /* !HAVE_STRUCT_SOCKADDR_IN6 */

#ifndef AF_INET6
/* Define it to something that should never appear */
#define AF_INET6 AF_MAX
#endif

/*
 * Next, RFC2553 name / address resolution API
 */

#ifndef NI_NUMERICHOST
# define NI_NUMERICHOST    (1)
#endif
#ifndef NI_NAMEREQD
# define NI_NAMEREQD       (1<<1)
#endif
#ifndef NI_NUMERICSERV
# define NI_NUMERICSERV    (1<<2)
#endif

#ifndef AI_PASSIVE
# define AI_PASSIVE		(1)
#endif
#ifndef AI_CANONNAME
# define AI_CANONNAME		(1<<1)
#endif
#ifndef AI_NUMERICHOST
# define AI_NUMERICHOST		(1<<2)
#endif

#ifndef NI_MAXSERV
# define NI_MAXSERV 32
#endif /* !NI_MAXSERV */
#ifndef NI_MAXHOST
# define NI_MAXHOST 1025
#endif /* !NI_MAXHOST */

#ifndef EAI_NODATA
# define EAI_NODATA	(INT_MAX - 1)
#endif
#ifndef EAI_MEMORY
# define EAI_MEMORY	(INT_MAX - 2)
#endif
#ifndef EAI_NONAME
# define EAI_NONAME	(INT_MAX - 3)
#endif
#ifndef EAI_SYSTEM
# define EAI_SYSTEM	(INT_MAX - 4)
#endif
#ifndef EAI_FAMILY
# define EAI_FAMILY	(INT_MAX - 5)
#endif
#ifndef EAI_SERVICE
# define EAI_SERVICE      -8    /* SERVICE not supported for `ai_socktype'.  */
#endif

#ifndef HAVE_STRUCT_ADDRINFO
struct addrinfo {
	int	ai_flags;	/* AI_PASSIVE, AI_CANONNAME */
	int	ai_family;	/* PF_xxx */
	int	ai_socktype;	/* SOCK_xxx */
	int	ai_protocol;	/* 0 or IPPROTO_xxx for IPv4 and IPv6 */
	size_t	ai_addrlen;	/* length of ai_addr */
	char	*ai_canonname;	/* canonical name for hostname */
	struct sockaddr *ai_addr;	/* binary address */
	struct addrinfo *ai_next;	/* next structure in linked list */
};
#endif /* !HAVE_STRUCT_ADDRINFO */

#ifndef HAVE_GETADDRINFO
#ifdef getaddrinfo
# undef getaddrinfo
#endif
#define getaddrinfo(a,b,c,d)    (fake_getaddrinfo(a,b,c,d))
int getaddrinfo(const char *, const char *, 
    const struct addrinfo *, struct addrinfo **);
#endif /* !HAVE_GETADDRINFO */

#ifndef HAVE_GAI_STRERROR
#define gai_strerror(a)         (fake_gai_strerror(a))
const char *gai_strerror(int);
#endif /* !HAVE_GAI_STRERROR */

#ifndef HAVE_FREEADDRINFO
#define freeaddrinfo(a)         (fake_freeaddrinfo(a))
void freeaddrinfo(struct addrinfo *);
#endif /* !HAVE_FREEADDRINFO */

#ifndef HAVE_GETNAMEINFO
#define getnameinfo(a,b,c,d,e,f,g) (fake_getnameinfo(a,b,c,d,e,f,g))
int getnameinfo(const struct sockaddr *, size_t, char *, size_t, 
    char *, size_t, int);
#endif /* !HAVE_GETNAMEINFO */


#endif /* !_FAKE_RFC2553_H */

/* 
 * mkstemp.c --
 *
 *	Source code for the "mkstemp" library routine.
 *
 * Copyright (c) 2009 Donal K. Fellows
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id$
 */

#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>

/*
 *----------------------------------------------------------------------
 *
 * mkstemp --
 *
 *	Create an open temporary file from a template.
 *
 * Results:
 *	A file descriptor, or -1 (with errno set) in the case of an error.
 *
 * Side effects:
 *	The template is updated to contain the real filename.
 *
 *----------------------------------------------------------------------
 */

int
mkstemp(
    char *template)		/* Template for filename. */
{
    static const char alphanumerics[] =
	"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    register char *a, *b;
    int fd, count, alphanumericsLen = strlen(alphanumerics); /* == 62 */

    a = template + strlen(template);
    while (a > template && *(a-1) == 'X') {
	a--;
    }

    if (a == template) {
	errno = ENOENT;
	return -1;
    }

    /*
     * We'll only try up to 10 times; after that, we're suffering from enemy
     * action and should let the caller know.
     */

    count = 10;
    do {
	/*
	 * Replace the X's in the original template with random alphanumeric
	 * digits.
	 */

	for (b=a ; *b ; b++) {
	    float r = rand() / ((float) RAND_MAX);

	    *b = alphanumerics[(int)(r * alphanumericsLen)];
	}

	/*
	 * Template is now realized; try to open (with correct options).
	 */

	fd = open(template, O_RDWR|O_CREAT|O_EXCL, 0600);
    } while (fd == -1 && errno == EEXIST && --count > 0);

    return fd;
}

 * RCS: @(#) $Id: opendir.c,v 1.4 2007/04/16 13:36:34 dkf Exp $
 */

#include "tclInt.h"

#undef DIRSIZ
#define DIRSIZ(dp) \
    ((sizeof (struct dirent) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))
    ((sizeof(struct dirent) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))

/*
 * open a directory.
 */

DIR *
opendir(

/*
 * read an old style directory entry and present it as a new one
 */
#ifndef pyr
#define	ODIRSIZ	14

struct	olddirect {
struct olddirect {
    ino_t od_ino;
    char od_name[ODIRSIZ];
};
#else	/* a Pyramid in the ATT universe */
#define	ODIRSIZ	248

struct	olddirect {
struct olddirect {
    long od_ino;
    short od_fill1, od_fill2;
    char od_name[ODIRSIZ];
};
#endif

/*

 *
 * RCS: @(#) $Id: stdlib.h,v 1.4 2008/05/02 10:27:04 dkf Exp $
 */

#ifndef _STDLIB
#define _STDLIB

#include <tcl.h>
/* TODO: Do we need tcl.h any more? */

extern void		abort(void);
extern double		atof(const char *string);
extern int		atoi(const char *string);
extern long		atol(const char *string);
extern char *		calloc(unsigned int numElements, unsigned int size);
extern void		exit(int status);
extern int		free(char *blockPtr);

 *
 * RCS: @(#) $Id: string.h,v 1.8 2008/05/02 10:27:04 dkf Exp $
 */

#ifndef _STRING
#define _STRING

#include <tcl.h>
#include "tcl.h"

/*
 * The following #include is needed to define size_t. (This used to include
 * sys/stdtypes.h but that doesn't exist on older versions of SunOS, e.g.
 * 4.0.2, so I'm trying sys/types.h now.... hopefully it exists everywhere)
 */

extern char *		strcpy(char *dst, const char *src);
extern size_t		strcspn(const char *string, const char *chars);
extern char *		strdup(const char *string);
extern char *		strerror(int error);
extern size_t		strlen(const char *string);
extern int		strncasecmp(const char *s1, const char *s2, size_t n);
extern char *		strncat(char *dst, const char *src, size_t numChars);
extern int		strncmp(const char *s1, const char *s2,size_t nChars);
extern int		strncmp(const char *s1, const char *s2, size_t nChars);
extern char *		strncpy(char *dst, const char *src, size_t numChars);
extern char *		strpbrk(const char *string, const char *chars);
extern char *		strrchr(const char *string, int c);
extern size_t		strspn(const char *string, const char *chars);
extern char *		strstr(const char *string, const char *substring);
extern char *		strtok(char *s, const char *delim);

#endif /* _STRING */

/*
 * This array is designed for mapping upper and lower case letter together for
 * a case independent comparison. The mappings are based upon ASCII character
 * sequences.
 */

static unsigned char charmap[] = {
static const unsigned char charmap[] = {
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
    0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,

 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: strtod.c,v 1.9 2008/04/27 22:21:28 dkf Exp $
 */

#include "tclInt.h"
#include <ctype.h>

#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
#ifndef NULL
#define NULL 0
#endif

static int maxExponent = 511;	/* Largest possible base 10 exponent.  Any
static const int maxExponent = 511;	/* Largest possible base 10 exponent.  Any
				 * exponent larger than this will already
				 * produce underflow or overflow, so there's
				 * no need to worry about additional digits.
				 */
static double powersOf10[] = {	/* Table giving binary powers of 10.  Entry */
static const double powersOf10[] = {	/* Table giving binary powers of 10.  Entry */
    10.,			/* is 10^2^i.  Used to convert decimal */
    100.,			/* exponents into floating-point numbers. */
    1.0e4,
    1.0e8,
    1.0e16,
    1.0e32,
    1.0e64,

				 * necessary unless F is present. The "E" may
				 * actually be an "e". E and X may both be
				 * omitted (but not just one). */
    char **endPtr)		/* If non-NULL, store terminating character's
				 * address here. */
{
    int sign, expSign = FALSE;
    double fraction, dblExp, *d;
    double fraction, dblExp;
    const double *d;
    register const char *p;
    register int c;
    int exp = 0;		/* Exponent read from "EX" field. */
    int fracExp = 0;		/* Exponent that derives from the fractional
				 * part. Under normal circumstatnces, it is
				 * the negative of the number of digits in F.
				 * However, if I is very long, the last digits

	expSign = FALSE;
    }
    if (exp > maxExponent) {
	exp = maxExponent;
	errno = ERANGE;
    }
    dblExp = 1.0;
    for (d = powersOf10; exp != 0; exp >>= 1, d += 1) {
    for (d = powersOf10; exp != 0; exp >>= 1, ++d) {
	if (exp & 01) {
	    dblExp *= *d;
	}
    }
    if (expSign) {
	fraction /= dblExp;
    } else {

 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: strtol.c,v 1.7 2008/04/27 22:21:28 dkf Exp $
 */

#include <ctype.h>
#include "tclInt.h"

/*
 *----------------------------------------------------------------------
 *
 * strtol --
 *

/*
 * The table below is used to convert from ASCII digits to a numerical
 * equivalent. It maps from '0' through 'z' to integers (100 for non-digit
 * characters).
 */

static char cvtIn[] = {
static const char cvtIn[] = {
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9,		/* '0' - '9' */
    100, 100, 100, 100, 100, 100, 100,		/* punctuation */
    10, 11, 12, 13, 14, 15, 16, 17, 18, 19,	/* 'A' - 'Z' */
    20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
    30, 31, 32, 33, 34, 35,
    100, 100, 100, 100, 100, 100,		/* punctuation */
    10, 11, 12, 13, 14, 15, 16, 17, 18, 19,	/* 'a' - 'z' */

 *
 * RCS: @(#) $Id: unistd.h,v 1.4 2008/05/04 07:28:47 nijtmans Exp $
 */

#ifndef _UNISTD
#define _UNISTD

#include <sys/types.h>
#include "tcl.h"
#ifndef _TCL
#   include "tcl.h"
#include <sys/types.h>
#endif

#ifndef NULL
#define NULL    0
#endif

/* 
 * Strict POSIX stuff goes here. Extensions go down below, in the ifndef

cmake_minimum_required(VERSION 2.4.4)
set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)

project(zlib C)

if(NOT DEFINED BUILD_SHARED_LIBS)
    option(BUILD_SHARED_LIBS "Build a shared library form of zlib" ON)
endif()

include(CheckTypeSize)
include(CheckFunctionExists)
include(CheckIncludeFile)
include(CheckCSourceCompiles)
enable_testing()

check_include_file(sys/types.h HAVE_SYS_TYPES_H)
check_include_file(stdint.h    HAVE_STDINT_H)
check_include_file(stddef.h    HAVE_STDDEF_H)

#
# Check to see if we have large file support
#
set(CMAKE_REQUIRED_DEFINITIONS -D_LARGEFILE64_SOURCE=1)
# We add these other definitions here because CheckTypeSize.cmake
# in CMake 2.4.x does not automatically do so and we want
# compatibility with CMake 2.4.x.
if(HAVE_SYS_TYPES_H)
    list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_SYS_TYPES_H)
endif()
if(HAVE_STDINT_H)
    list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDINT_H)
endif()
if(HAVE_STDDEF_H)
    list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDDEF_H)
endif()
check_type_size(off64_t OFF64_T)
if(HAVE_OFF64_T)
   add_definitions(-D_LARGEFILE64_SOURCE=1)
endif()
set(CMAKE_REQUIRED_DEFINITIONS) # clear variable

#
# Check for fseeko
#
check_function_exists(fseeko HAVE_FSEEKO)
if(NOT HAVE_FSEEKO)
    add_definitions(-DNO_FSEEKO)
endif()

#
# Check for unistd.h
#
check_include_file(unistd.h Z_HAVE_UNISTD_H)

if(MSVC)
    set(CMAKE_DEBUG_POSTFIX "d")
    add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
    add_definitions(-D_CRT_NONSTDC_NO_DEPRECATE)
endif()

if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)
    # If we're doing an out of source build and the user has a zconf.h
    # in their source tree...
    if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h)
        message(FATAL_ERROR
            "You must remove ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h "
            "from the source tree.  This file is included with zlib "
            "but CMake generates this file for you automatically "
            "in the build directory.")
  endif()
endif()

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/zconf.h.cmakein
               ${CMAKE_CURRENT_BINARY_DIR}/zconf.h @ONLY)
include_directories(${CMAKE_CURRENT_BINARY_DIR})


#============================================================================
# zlib
#============================================================================

set(ZLIB_PUBLIC_HDRS
    ${CMAKE_CURRENT_BINARY_DIR}/zconf.h
    zlib.h
)
set(ZLIB_PRIVATE_HDRS
    crc32.h
    deflate.h
    gzguts.h
    inffast.h
    inffixed.h
    inflate.h
    inftrees.h
    trees.h
    zutil.h
)
set(ZLIB_SRCS
    adler32.c
    compress.c
    crc32.c
    deflate.c
    gzclose.c
    gzlib.c
    gzread.c
    gzwrite.c
    inflate.c
    infback.c
    inftrees.c
    inffast.c
    trees.c
    uncompr.c
    zutil.c
    win32/zlib1.rc
)

# parse the full version number from zlib.h and include in ZLIB_FULL_VERSION
file(READ ${CMAKE_CURRENT_SOURCE_DIR}/zlib.h _zlib_h_contents)
string(REGEX REPLACE ".*#define[ \t]+ZLIB_VERSION[ \t]+\"([0-9A-Za-z.]+)\".*"
    "\\1" ZLIB_FULL_VERSION ${_zlib_h_contents})

if(MINGW)
    # This gets us DLL resource information when compiling on MinGW.
    add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
                       COMMAND windres.exe
                            -D GCC_WINDRES
                            -I ${CMAKE_CURRENT_SOURCE_DIR}
                            -I ${CMAKE_CURRENT_BINARY_DIR}
                            -o ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
                            -i ${CMAKE_CURRENT_SOURCE_DIR}/win32/zlib1.rc)
    set(ZLIB_SRCS ${ZLIB_SRCS} ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
endif(MINGW)

add_library(zlib ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)

set_target_properties(zlib PROPERTIES SOVERSION 1)

if(NOT CYGWIN)
    # This property causes shared libraries on Linux to have the full version
    # encoded into their final filename.  We disable this on Cygwin because
    # it causes cygz-${ZLIB_FULL_VERSION}.dll to be created when cygz.dll
    # seems to be the default.
    #
    # This has no effect with MSVC, on that platform the version info for
    # the DLL comes from the resource file win32/zlib1.rc
    set_target_properties(zlib PROPERTIES VERSION ${ZLIB_FULL_VERSION})
endif()

if(UNIX)
    # On unix-like platforms the library is almost always called libz
   set_target_properties(zlib PROPERTIES OUTPUT_NAME z)
elseif(BUILD_SHARED_LIBS AND WIN32)
    # Creates zlib1.dll when building shared library version
    set_target_properties(zlib PROPERTIES SUFFIX "1.dll")
endif()

if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
    install(TARGETS zlib
        RUNTIME DESTINATION bin
        ARCHIVE DESTINATION lib
        LIBRARY DESTINATION lib )
endif()
if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL )
    install(FILES ${ZLIB_PUBLIC_HDRS} DESTINATION include)
endif()
if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
    install(FILES zlib.3 DESTINATION share/man/man3)
endif()

#============================================================================
# Example binaries
#============================================================================

add_executable(example example.c)
target_link_libraries(example zlib)
add_test(example example)

add_executable(minigzip minigzip.c)
target_link_libraries(minigzip zlib)

if(HAVE_OFF64_T)
    add_executable(example64 example.c)
    target_link_libraries(example64 zlib)
    set_target_properties(example64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
    add_test(example64 example64)

    add_executable(minigzip64 minigzip.c)
    target_link_libraries(minigzip64 zlib)
    set_target_properties(minigzip64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
endif()

                ChangeLog file for zlib

Changes in 1.2.5 (19 Apr 2010)
- Disable visibility attribute in win32/Makefile.gcc [Bar-Lev]
- Default to libdir as sharedlibdir in configure [Nieder]
- Update copyright dates on modified source files
- Update trees.c to be able to generate modified trees.h
- Exit configure for MinGW, suggesting win32/Makefile.gcc

Changes in 1.2.4.5 (18 Apr 2010)
- Set sharedlibdir in configure [Torok]
- Set LDFLAGS in Makefile.in [Bar-Lev]
- Avoid mkdir objs race condition in Makefile.in [Bowler]
- Add ZLIB_INTERNAL in front of internal inter-module functions and arrays
- Define ZLIB_INTERNAL to hide internal functions and arrays for GNU C
- Don't use hidden attribute when it is a warning generator (e.g. Solaris)

Changes in 1.2.4.4 (18 Apr 2010)
- Fix CROSS_PREFIX executable testing, CHOST extract, mingw* [Torok]
- Undefine _LARGEFILE64_SOURCE in zconf.h if it is zero, but not if empty
- Try to use bash or ksh regardless of functionality of /bin/sh
- Fix configure incompatibility with NetBSD sh
- Remove attempt to run under bash or ksh since have better NetBSD fix
- Fix win32/Makefile.gcc for MinGW [Bar-Lev]
- Add diagnostic messages when using CROSS_PREFIX in configure
- Added --sharedlibdir option to configure [Weigelt]
- Use hidden visibility attribute when available [Frysinger]

Changes in 1.2.4.3 (10 Apr 2010)
- Only use CROSS_PREFIX in configure for ar and ranlib if they exist
- Use CROSS_PREFIX for nm [Bar-Lev]
- Assume _LARGEFILE64_SOURCE defined is equivalent to true
- Avoid use of undefined symbols in #if with && and ||
- Make *64 prototypes in gzguts.h consistent with functions
- Add -shared load option for MinGW in configure [Bowler]
- Move z_off64_t to public interface, use instead of off64_t
- Remove ! from shell test in configure (not portable to Solaris)
- Change +0 macro tests to -0 for possibly increased portability

Changes in 1.2.4.2 (9 Apr 2010)
- Add consistent carriage returns to readme.txt's in masmx86 and masmx64
- Really provide prototypes for *64 functions when building without LFS
- Only define unlink() in minigzip.c if unistd.h not included
- Update README to point to contrib/vstudio project files
- Move projects/vc6 to old/ and remove projects/
- Include stdlib.h in minigzip.c for setmode() definition under WinCE
- Clean up assembler builds in win32/Makefile.msc [Rowe]
- Include sys/types.h for Microsoft for off_t definition
- Fix memory leak on error in gz_open()
- Symbolize nm as $NM in configure [Weigelt]
- Use TEST_LDSHARED instead of LDSHARED to link test programs [Weigelt]
- Add +0 to _FILE_OFFSET_BITS and _LFS64_LARGEFILE in case not defined
- Fix bug in gzeof() to take into account unused input data
- Avoid initialization of structures with variables in puff.c
- Updated win32/README-WIN32.txt [Rowe]

Changes in 1.2.4.1 (28 Mar 2010)
- Remove the use of [a-z] constructs for sed in configure [gentoo 310225]
- Remove $(SHAREDLIB) from LIBS in Makefile.in [Creech]
- Restore "for debugging" comment on sprintf() in gzlib.c
- Remove fdopen for MVS from gzguts.h
- Put new README-WIN32.txt in win32 [Rowe]
- Add check for shell to configure and invoke another shell if needed
- Fix big fat stinking bug in gzseek() on uncompressed files
- Remove vestigial F_OPEN64 define in zutil.h
- Set and check the value of _LARGEFILE_SOURCE and _LARGEFILE64_SOURCE
- Avoid errors on non-LFS systems when applications define LFS macros
- Set EXE to ".exe" in configure for MINGW [Kahle]
- Match crc32() in crc32.c exactly to the prototype in zlib.h [Sherrill]
- Add prefix for cross-compilation in win32/makefile.gcc [Bar-Lev]
- Add DLL install in win32/makefile.gcc [Bar-Lev]
- Allow Linux* or linux* from uname in configure [Bar-Lev]
- Allow ldconfig to be redefined in configure and Makefile.in [Bar-Lev]
- Add cross-compilation prefixes to configure [Bar-Lev]
- Match type exactly in gz_load() invocation in gzread.c
- Match type exactly of zcalloc() in zutil.c to zlib.h alloc_func
- Provide prototypes for *64 functions when building zlib without LFS
- Don't use -lc when linking shared library on MinGW
- Remove errno.h check in configure and vestigial errno code in zutil.h

Changes in 1.2.4 (14 Mar 2010)
- Fix VER3 extraction in configure for no fourth subversion
- Update zlib.3, add docs to Makefile.in to make .pdf out of it
- Add zlib.3.pdf to distribution
- Don't set error code in gzerror() if passed pointer is NULL
- Apply destination directory fixes to CMakeLists.txt [Lowman]
- Move #cmakedefine's to a new zconf.in.cmakein
- Restore zconf.h for builds that don't use configure or cmake
- Add distclean to dummy Makefile for convenience
- Update and improve INDEX, README, and FAQ
- Update CMakeLists.txt for the return of zconf.h [Lowman]
- Update contrib/vstudio/vc9 and vc10 [Vollant]
- Change libz.dll.a back to libzdll.a in win32/Makefile.gcc
- Apply license and readme changes to contrib/asm686 [Raiter]
- Check file name lengths and add -c option in minigzip.c [Li]
- Update contrib/amd64 and contrib/masmx86/ [Vollant]
- Avoid use of "eof" parameter in trees.c to not shadow library variable
- Update make_vms.com for removal of zlibdefs.h [Zinser]
- Update assembler code and vstudio projects in contrib [Vollant]
- Remove outdated assembler code contrib/masm686 and contrib/asm586
- Remove old vc7 and vc8 from contrib/vstudio
- Update win32/Makefile.msc, add ZLIB_VER_SUBREVISION [Rowe]
- Fix memory leaks in gzclose_r() and gzclose_w(), file leak in gz_open()
- Add contrib/gcc_gvmat64 for longest_match and inflate_fast [Vollant]
- Remove *64 functions from win32/zlib.def (they're not 64-bit yet)
- Fix bug in void-returning vsprintf() case in gzwrite.c
- Fix name change from inflate.h in contrib/inflate86/inffas86.c
- Check if temporary file exists before removing in make_vms.com [Zinser]
- Fix make install and uninstall for --static option
- Fix usage of _MSC_VER in gzguts.h and zutil.h [Truta]
- Update readme.txt in contrib/masmx64 and masmx86 to assemble

Changes in 1.2.3.9 (21 Feb 2010)
- Expunge gzio.c
- Move as400 build information to old
- Fix updates in contrib/minizip and contrib/vstudio
- Add const to vsnprintf test in configure to avoid warnings [Weigelt]
- Delete zconf.h (made by configure) [Weigelt]
- Change zconf.in.h to zconf.h.in per convention [Weigelt]
- Check for NULL buf in gzgets()
- Return empty string for gzgets() with len == 1 (like fgets())
- Fix description of gzgets() in zlib.h for end-of-file, NULL return
- Update minizip to 1.1 [Vollant]
- Avoid MSVC loss of data warnings in gzread.c, gzwrite.c
- Note in zlib.h that gzerror() should be used to distinguish from EOF
- Remove use of snprintf() from gzlib.c
- Fix bug in gzseek()
- Update contrib/vstudio, adding vc9 and vc10 [Kuno, Vollant]
- Fix zconf.h generation in CMakeLists.txt [Lowman]
- Improve comments in zconf.h where modified by configure

Changes in 1.2.3.8 (13 Feb 2010)
- Clean up text files (tabs, trailing whitespace, etc.) [Oberhumer]
- Use z_off64_t in gz_zero() and gz_skip() to match state->skip
- Avoid comparison problem when sizeof(int) == sizeof(z_off64_t)
- Revert to Makefile.in from 1.2.3.6 (live with the clutter)
- Fix missing error return in gzflush(), add zlib.h note
- Add *64 functions to zlib.map [Levin]
- Fix signed/unsigned comparison in gz_comp()
- Use SFLAGS when testing shared linking in configure
- Add --64 option to ./configure to use -m64 with gcc
- Fix ./configure --help to correctly name options
- Have make fail if a test fails [Levin]
- Avoid buffer overrun in contrib/masmx64/gvmat64.asm [Simpson]
- Remove assembler object files from contrib

Changes in 1.2.3.7 (24 Jan 2010)
- Always gzopen() with O_LARGEFILE if available
- Fix gzdirect() to work immediately after gzopen() or gzdopen()
- Make gzdirect() more precise when the state changes while reading
- Improve zlib.h documentation in many places
- Catch memory allocation failure in gz_open()
- Complete close operation if seek forward in gzclose_w() fails
- Return Z_ERRNO from gzclose_r() if close() fails
- Return Z_STREAM_ERROR instead of EOF for gzclose() being passed NULL
- Return zero for gzwrite() errors to match zlib.h description
- Return -1 on gzputs() error to match zlib.h description
- Add zconf.in.h to allow recovery from configure modification [Weigelt]
- Fix static library permissions in Makefile.in [Weigelt]
- Avoid warnings in configure tests that hide functionality [Weigelt]
- Add *BSD and DragonFly to Linux case in configure [gentoo 123571]
- Change libzdll.a to libz.dll.a in win32/Makefile.gcc [gentoo 288212]
- Avoid access of uninitialized data for first inflateReset2 call [Gomes]
- Keep object files in subdirectories to reduce the clutter somewhat
- Remove default Makefile and zlibdefs.h, add dummy Makefile
- Add new external functions to Z_PREFIX, remove duplicates, z_z_ -> z_
- Remove zlibdefs.h completely -- modify zconf.h instead

Changes in 1.2.3.6 (17 Jan 2010)
- Avoid void * arithmetic in gzread.c and gzwrite.c
- Make compilers happier with const char * for gz_error message
- Avoid unused parameter warning in inflate.c
- Avoid signed-unsigned comparison warning in inflate.c
- Indent #pragma's for traditional C
- Fix usage of strwinerror() in glib.c, change to gz_strwinerror()
- Correct email address in configure for system options
- Update make_vms.com and add make_vms.com to contrib/minizip [Zinser]
- Update zlib.map [Brown]
- Fix Makefile.in for Solaris 10 make of example64 and minizip64 [Torok]
- Apply various fixes to CMakeLists.txt [Lowman]
- Add checks on len in gzread() and gzwrite()
- Add error message for no more room for gzungetc()
- Remove zlib version check in gzwrite()
- Defer compression of gzprintf() result until need to
- Use snprintf() in gzdopen() if available
- Remove USE_MMAP configuration determination (only used by minigzip)
- Remove examples/pigz.c (available separately)
- Update examples/gun.c to 1.6

Changes in 1.2.3.5 (8 Jan 2010)
- Add space after #if in zutil.h for some compilers
- Fix relatively harmless bug in deflate_fast() [Exarevsky]
- Fix same problem in deflate_slow()
- Add $(SHAREDLIBV) to LIBS in Makefile.in [Brown]
- Add deflate_rle() for faster Z_RLE strategy run-length encoding
- Add deflate_huff() for faster Z_HUFFMAN_ONLY encoding
- Change name of "write" variable in inffast.c to avoid library collisions
- Fix premature EOF from gzread() in gzio.c [Brown]
- Use zlib header window size if windowBits is 0 in inflateInit2()
- Remove compressBound() call in deflate.c to avoid linking compress.o
- Replace use of errno in gz* with functions, support WinCE [Alves]
- Provide alternative to perror() in minigzip.c for WinCE [Alves]
- Don't use _vsnprintf on later versions of MSVC [Lowman]
- Add CMake build script and input file [Lowman]
- Update contrib/minizip to 1.1 [Svensson, Vollant]
- Moved nintendods directory from contrib to .
- Replace gzio.c with a new set of routines with the same functionality
- Add gzbuffer(), gzoffset(), gzclose_r(), gzclose_w() as part of above
- Update contrib/minizip to 1.1b
- Change gzeof() to return 0 on error instead of -1 to agree with zlib.h

Changes in 1.2.3.4 (21 Dec 2009)
- Use old school .SUFFIXES in Makefile.in for FreeBSD compatibility
- Update comments in configure and Makefile.in for default --shared
- Fix test -z's in configure [Marquess]
- Build examplesh and minigzipsh when not testing
- Change NULL's to Z_NULL's in deflate.c and in comments in zlib.h
- Import LDFLAGS from the environment in configure
- Fix configure to populate SFLAGS with discovered CFLAGS options
- Adapt make_vms.com to the new Makefile.in [Zinser]
- Add zlib2ansi script for C++ compilation [Marquess]
- Add _FILE_OFFSET_BITS=64 test to make test (when applicable)
- Add AMD64 assembler code for longest match to contrib [Teterin]
- Include options from $SFLAGS when doing $LDSHARED
- Simplify 64-bit file support by introducing z_off64_t type
- Make shared object files in objs directory to work around old Sun cc
- Use only three-part version number for Darwin shared compiles
- Add rc option to ar in Makefile.in for when ./configure not run
- Add -WI,-rpath,. to LDFLAGS for OSF 1 V4*
- Set LD_LIBRARYN32_PATH for SGI IRIX shared compile
- Protect against _FILE_OFFSET_BITS being defined when compiling zlib
- Rename Makefile.in targets allstatic to static and allshared to shared
- Fix static and shared Makefile.in targets to be independent
- Correct error return bug in gz_open() by setting state [Brown]
- Put spaces before ;;'s in configure for better sh compatibility
- Add pigz.c (parallel implementation of gzip) to examples/
- Correct constant in crc32.c to UL [Leventhal]
- Reject negative lengths in crc32_combine()
- Add inflateReset2() function to work like inflateEnd()/inflateInit2()
- Include sys/types.h for _LARGEFILE64_SOURCE [Brown]
- Correct typo in doc/algorithm.txt [Janik]
- Fix bug in adler32_combine() [Zhu]
- Catch missing-end-of-block-code error in all inflates and in puff
    Assures that random input to inflate eventually results in an error
- Added enough.c (calculation of ENOUGH for inftrees.h) to examples/
- Update ENOUGH and its usage to reflect discovered bounds
- Fix gzerror() error report on empty input file [Brown]
- Add ush casts in trees.c to avoid pedantic runtime errors
- Fix typo in zlib.h uncompress() description [Reiss]
- Correct inflate() comments with regard to automatic header detection
- Remove deprecation comment on Z_PARTIAL_FLUSH (it stays)
- Put new version of gzlog (2.0) in examples with interruption recovery
- Add puff compile option to permit invalid distance-too-far streams
- Add puff TEST command options, ability to read piped input
- Prototype the *64 functions in zlib.h when _FILE_OFFSET_BITS == 64, but
  _LARGEFILE64_SOURCE not defined
- Fix Z_FULL_FLUSH to truly erase the past by resetting s->strstart
- Fix deflateSetDictionary() to use all 32K for output consistency
- Remove extraneous #define MIN_LOOKAHEAD in deflate.c (in deflate.h)
- Clear bytes after deflate lookahead to avoid use of uninitialized data
- Change a limit in inftrees.c to be more transparent to Coverity Prevent
- Update win32/zlib.def with exported symbols from zlib.h
- Correct spelling error in zlib.h [Willem]
- Allow Z_BLOCK for deflate() to force a new block
- Allow negative bits in inflatePrime() to delete existing bit buffer
- Add Z_TREES flush option to inflate() to return at end of trees
- Add inflateMark() to return current state information for random access
- Add Makefile for NintendoDS to contrib [Costa]
- Add -w in configure compile tests to avoid spurious warnings [Beucler]
- Fix typos in zlib.h comments for deflateSetDictionary()
- Fix EOF detection in transparent gzread() [Maier]

Changes in 1.2.3.3 (2 October 2006)
- Make --shared the default for configure, add a --static option
- Add compile option to permit invalid distance-too-far streams
- Add inflateUndermine() function which is required to enable above
- Remove use of "this" variable name for C++ compatibility [Marquess]
- Add testing of shared library in make test, if shared library built
- Use ftello() and fseeko() if available instead of ftell() and fseek()
- Provide two versions of all functions that use the z_off_t type for
  binary compatibility -- a normal version and a 64-bit offset version,
  per the Large File Support Extension when _LARGEFILE64_SOURCE is
  defined; use the 64-bit versions by default when _FILE_OFFSET_BITS
  is defined to be 64
- Add a --uname= option to configure to perhaps help with cross-compiling

Changes in 1.2.3.2 (3 September 2006)
- Turn off silly Borland warnings [Hay]
- Use off64_t and define _LARGEFILE64_SOURCE when present
- Fix missing dependency on inffixed.h in Makefile.in
- Rig configure --shared to build both shared and static [Teredesai, Truta]
- Remove zconf.in.h and instead create a new zlibdefs.h file
- Fix contrib/minizip/unzip.c non-encrypted after encrypted [Vollant]
- Add treebuild.xml (see http://treebuild.metux.de/) [Weigelt]

Changes in 1.2.3.1 (16 August 2006)
- Add watcom directory with OpenWatcom make files [Daniel]
- Remove #undef of FAR in zconf.in.h for MVS [Fedtke]
- Update make_vms.com [Zinser]
- Use -fPIC for shared build in configure [Teredesai, Nicholson]
- Use only major version number for libz.so on IRIX and OSF1 [Reinholdtsen]
- Use fdopen() (not _fdopen()) for Interix in zutil.h [BŠck]
- Add some FAQ entries about the contrib directory
- Update the MVS question in the FAQ
- Avoid extraneous reads after EOF in gzio.c [Brown]
- Correct spelling of "successfully" in gzio.c [Randers-Pehrson]
- Add comments to zlib.h about gzerror() usage [Brown]
- Set extra flags in gzip header in gzopen() like deflate() does
- Make configure options more compatible with double-dash conventions
  [Weigelt]
- Clean up compilation under Solaris SunStudio cc [Rowe, Reinholdtsen]
- Fix uninstall target in Makefile.in [Truta]
- Add pkgconfig support [Weigelt]
- Use $(DESTDIR) macro in Makefile.in [Reinholdtsen, Weigelt]
- Replace set_data_type() with a more accurate detect_data_type() in
  trees.c, according to the txtvsbin.txt document [Truta]
- Swap the order of #include <stdio.h> and #include "zlib.h" in
  gzio.c, example.c and minigzip.c [Truta]
- Shut up annoying VS2005 warnings about standard C deprecation [Rowe,
  Truta] (where?)
- Fix target "clean" from win32/Makefile.bor [Truta]
- Create .pdb and .manifest files in win32/makefile.msc [Ziegler, Rowe]
- Update zlib www home address in win32/DLL_FAQ.txt [Truta]
- Update contrib/masmx86/inffas32.asm for VS2005 [Vollant, Van Wassenhove]
- Enable browse info in the "Debug" and "ASM Debug" configurations in
  the Visual C++ 6 project, and set (non-ASM) "Debug" as default [Truta]
- Add pkgconfig support [Weigelt]
- Add ZLIB_VER_MAJOR, ZLIB_VER_MINOR and ZLIB_VER_REVISION in zlib.h,
  for use in win32/zlib1.rc [Polushin, Rowe, Truta]
- Add a document that explains the new text detection scheme to
  doc/txtvsbin.txt [Truta]
- Add rfc1950.txt, rfc1951.txt and rfc1952.txt to doc/ [Truta]
- Move algorithm.txt into doc/ [Truta]
- Synchronize FAQ with website
- Fix compressBound(), was low for some pathological cases [Fearnley]
- Take into account wrapper variations in deflateBound()
- Set examples/zpipe.c input and output to binary mode for Windows
- Update examples/zlib_how.html with new zpipe.c (also web site)
- Fix some warnings in examples/gzlog.c and examples/zran.c (it seems
  that gcc became pickier in 4.0)
- Add zlib.map for Linux: "All symbols from zlib-1.1.4 remain
  un-versioned, the patch adds versioning only for symbols introduced in
  zlib-1.2.0 or later.  It also declares as local those symbols which are
  not designed to be exported." [Levin]
- Update Z_PREFIX list in zconf.in.h, add --zprefix option to configure
- Do not initialize global static by default in trees.c, add a response
  NO_INIT_GLOBAL_POINTERS to initialize them if needed [Marquess]
- Don't use strerror() in gzio.c under WinCE [Yakimov]
- Don't use errno.h in zutil.h under WinCE [Yakimov]
- Move arguments for AR to its usage to allow replacing ar [Marot]
- Add HAVE_VISIBILITY_PRAGMA in zconf.in.h for Mozilla [Randers-Pehrson]
- Improve inflateInit() and inflateInit2() documentation
- Fix structure size comment in inflate.h
- Change configure help option from --h* to --help [Santos]

Changes in 1.2.3 (18 July 2005)
- Apply security vulnerability fixes to contrib/infback9 as well
- Clean up some text files (carriage returns, trailing space)
- Update testzlib, vstudio, masmx64, and masmx86 in contrib [Vollant]

Changes in 1.2.2.4 (11 July 2005)
- Add inflatePrime() function for starting inflation at bit boundary
- Avoid some Visual C warnings in deflate.c
- Avoid more silly Visual C warnings in inflate.c and inftrees.c for 64-bit
  compile
- Fix some spelling errors in comments [Betts]
- Correct inflateInit2() error return documentation in zlib.h
- Add zran.c example of compressed data random access to examples
  directory, shows use of inflatePrime()
- Fix cast for assignments to strm->state in inflate.c and infback.c
- Fix zlibCompileFlags() in zutil.c to use 1L for long shifts [Oberhumer]
- Move declarations of gf2 functions to right place in crc32.c [Oberhumer]
- Add cast in trees.c t avoid a warning [Oberhumer]
- Avoid some warnings in fitblk.c, gun.c, gzjoin.c in examples [Oberhumer]
- Update make_vms.com [Zinser]
- Initialize state->write in inflateReset() since copied in inflate_fast()
- Be more strict on incomplete code sets in inflate_table() and increase
  ENOUGH and MAXD -- this repairs a possible security vulnerability for
  invalid inflate input.  Thanks to Tavis Ormandy and Markus Oberhumer for
  discovering the vulnerability and providing test cases.
- Add ia64 support to configure for HP-UX [Smith]
- Add error return to gzread() for format or i/o error [Levin]
- Use malloc.h for OS/2 [Necasek]

Changes in 1.2.2.3 (27 May 2005)
- Replace 1U constants in inflate.c and inftrees.c for 64-bit compile
- Typecast fread() return values in gzio.c [Vollant]
- Remove trailing space in minigzip.c outmode (VC++ can't deal with it)
- Fix crc check bug in gzread() after gzungetc() [Heiner]
- Add the deflateTune() function to adjust internal compression parameters
- Add a fast gzip decompressor, gun.c, to examples (use of inflateBack)
- Remove an incorrect assertion in examples/zpipe.c
- Add C++ wrapper in infback9.h [Donais]
- Fix bug in inflateCopy() when decoding fixed codes
- Note in zlib.h how much deflateSetDictionary() actually uses
- Remove USE_DICT_HEAD in deflate.c (would mess up inflate if used)
- Add _WIN32_WCE to define WIN32 in zconf.in.h [Spencer]
- Don't include stderr.h or errno.h for _WIN32_WCE in zutil.h [Spencer]
- Add gzdirect() function to indicate transparent reads
- Update contrib/minizip [Vollant]
- Fix compilation of deflate.c when both ASMV and FASTEST [Oberhumer]
- Add casts in crc32.c to avoid warnings [Oberhumer]
- Add contrib/masmx64 [Vollant]
- Update contrib/asm586, asm686, masmx86, testzlib, vstudio [Vollant]

Changes in 1.2.2.2 (30 December 2004)
- Replace structure assignments in deflate.c and inflate.c with zmemcpy to
  avoid implicit memcpy calls (portability for no-library compilation)
- Increase sprintf() buffer size in gzdopen() to allow for large numbers
- Add INFLATE_STRICT to check distances against zlib header
- Improve WinCE errno handling and comments [Chang]
- Remove comment about no gzip header processing in FAQ
- Add Z_FIXED strategy option to deflateInit2() to force fixed trees
- Add updated make_vms.com [Coghlan], update README
- Create a new "examples" directory, move gzappend.c there, add zpipe.c,
  fitblk.c, gzlog.[ch], gzjoin.c, and zlib_how.html.
- Add FAQ entry and comments in deflate.c on uninitialized memory access
- Add Solaris 9 make options in configure [Gilbert]
- Allow strerror() usage in gzio.c for STDC
- Fix DecompressBuf in contrib/delphi/ZLib.pas [ManChesTer]
- Update contrib/masmx86/inffas32.asm and gvmat32.asm [Vollant]
- Use z_off_t for adler32_combine() and crc32_combine() lengths
- Make adler32() much faster for small len
- Use OS_CODE in deflate() default gzip header

Changes in 1.2.2.1 (31 October 2004)
- Allow inflateSetDictionary() call for raw inflate
- Fix inflate header crc check bug for file names and comments
- Add deflateSetHeader() and gz_header structure for custom gzip headers
- Add inflateGetheader() to retrieve gzip headers
- Add crc32_combine() and adler32_combine() functions
- Add alloc_func, free_func, in_func, out_func to Z_PREFIX list
- Use zstreamp consistently in zlib.h (inflate_back functions)
- Remove GUNZIP condition from definition of inflate_mode in inflate.h
  and in contrib/inflate86/inffast.S [Truta, Anderson]
- Add support for AMD64 in contrib/inflate86/inffas86.c [Anderson]
- Update projects/README.projects and projects/visualc6 [Truta]
- Update win32/DLL_FAQ.txt [Truta]
- Avoid warning under NO_GZCOMPRESS in gzio.c; fix typo [Truta]
- Deprecate Z_ASCII; use Z_TEXT instead [Truta]
- Use a new algorithm for setting strm->data_type in trees.c [Truta]
- Do not define an exit() prototype in zutil.c unless DEBUG defined
- Remove prototype of exit() from zutil.c, example.c, minigzip.c [Truta]
- Add comment in zlib.h for Z_NO_FLUSH parameter to deflate()
- Fix Darwin build version identification [Peterson]

Changes in 1.2.2 (3 October 2004)
- Update zlib.h comments on gzip in-memory processing
- Set adler to 1 in inflateReset() to support Java test suite [Walles]
- Add contrib/dotzlib [Ravn]
- Update win32/DLL_FAQ.txt [Truta]
- Update contrib/minizip [Vollant]
- Move contrib/visual-basic.txt to old/ [Truta]
- Fix assembler builds in projects/visualc6/ [Truta]

Changes in 1.2.1.2 (9 September 2004)
- Update INDEX file
- Fix trees.c to update strm->data_type (no one ever noticed!)
- Fix bug in error case in inflate.c, infback.c, and infback9.c [Brown]
- Add "volatile" to crc table flag declaration (for DYNAMIC_CRC_TABLE)
- Add limited multitasking protection to DYNAMIC_CRC_TABLE
- Add NO_vsnprintf for VMS in zutil.h [Mozilla]
- Don't declare strerror() under VMS [Mozilla]
- Add comment to DYNAMIC_CRC_TABLE to use get_crc_table() to initialize
- Update contrib/ada [Anisimkov]
- Update contrib/minizip [Vollant]
- Fix configure to not hardcode directories for Darwin [Peterson]
- Fix gzio.c to not return error on empty files [Brown]
- Fix indentation; update version in contrib/delphi/ZLib.pas and
  contrib/pascal/zlibpas.pas [Truta]
- Update mkasm.bat in contrib/masmx86 [Truta]
- Update contrib/untgz [Truta]
- Add projects/README.projects [Truta]
- Add project for MS Visual C++ 6.0 in projects/visualc6 [Cadieux, Truta]
- Update win32/DLL_FAQ.txt [Truta]
- Update list of Z_PREFIX symbols in zconf.h [Randers-Pehrson, Truta]
- Remove an unnecessary assignment to curr in inftrees.c [Truta]
- Add OS/2 to exe builds in configure [Poltorak]
- Remove err dummy parameter in zlib.h [Kientzle]

Changes in 1.2.1.1 (9 January 2004)
- Update email address in README
- Several FAQ updates
- Fix a big fat bug in inftrees.c that prevented decoding valid
  dynamic blocks with only literals and no distance codes --
  Thanks to "Hot Emu" for the bug report and sample file
- Add a note to puff.c on no distance codes case.

Changes in 1.2.1 (17 November 2003)
- Remove a tab in contrib/gzappend/gzappend.c
- Update some interfaces in contrib for new zlib functions
- Update zlib version number in some contrib entries
- Add Windows CE definition for ptrdiff_t in zutil.h [Mai, Truta]
- Support shared libraries on Hurd and KFreeBSD [Brown]
- Fix error in NO_DIVIDE option of adler32.c

Changes in 1.2.0.8 (4 November 2003)
- Update version in contrib/delphi/ZLib.pas and contrib/pascal/zlibpas.pas
- Add experimental NO_DIVIDE #define in adler32.c
    - Possibly faster on some processors (let me know if it is)
- Correct Z_BLOCK to not return on first inflate call if no wrap
- Fix strm->data_type on inflate() return to correctly indicate EOB
- Add deflatePrime() function for appending in the middle of a byte
- Add contrib/gzappend for an example of appending to a stream
- Update win32/DLL_FAQ.txt [Truta]
- Delete Turbo C comment in README [Truta]
- Improve some indentation in zconf.h [Truta]
- Fix infinite loop on bad input in configure script [Church]
- Fix gzeof() for concatenated gzip files [Johnson]
- Add example to contrib/visual-basic.txt [Michael B.]
- Add -p to mkdir's in Makefile.in [vda]
- Fix configure to properly detect presence or lack of printf functions
- Add AS400 support [Monnerat]
- Add a little Cygwin support [Wilson]

Changes in 1.2.0.7 (21 September 2003)
- Correct some debug formats in contrib/infback9
- Cast a type in a debug statement in trees.c
- Change search and replace delimiter in configure from % to # [Beebe]
- Update contrib/untgz to 0.2 with various fixes [Truta]
- Add build support for Amiga [Nikl]
- Remove some directories in old that have been updated to 1.2
- Add dylib building for Mac OS X in configure and Makefile.in
- Remove old distribution stuff from Makefile
- Update README to point to DLL_FAQ.txt, and add comment on Mac OS X
- Update links in README

Changes in 1.2.0.6 (13 September 2003)
- Minor FAQ updates
- Update contrib/minizip to 1.00 [Vollant]
- Remove test of gz functions in example.c when GZ_COMPRESS defined [Truta]
- Update POSTINC comment for 68060 [Nikl]
- Add contrib/infback9 with deflate64 decoding (unsupported)
- For MVS define NO_vsnprintf and undefine FAR [van Burik]
- Add pragma for fdopen on MVS [van Burik]

Changes in 1.2.0.5 (8 September 2003)
- Add OF to inflateBackEnd() declaration in zlib.h
- Remember start when using gzdopen in the middle of a file
- Use internal off_t counters in gz* functions to properly handle seeks
- Perform more rigorous check for distance-too-far in inffast.c
- Add Z_BLOCK flush option to return from inflate at block boundary
- Set strm->data_type on return from inflate
    - Indicate bits unused, if at block boundary, and if in last block
- Replace size_t with ptrdiff_t in crc32.c, and check for correct size
- Add condition so old NO_DEFLATE define still works for compatibility
- FAQ update regarding the Windows DLL [Truta]
- INDEX update: add qnx entry, remove aix entry [Truta]
- Install zlib.3 into mandir [Wilson]
- Move contrib/zlib_dll_FAQ.txt to win32/DLL_FAQ.txt; update [Truta]
- Adapt the zlib interface to the new DLL convention guidelines [Truta]
- Introduce ZLIB_WINAPI macro to allow the export of functions using
  the WINAPI calling convention, for Visual Basic [Vollant, Truta]
- Update msdos and win32 scripts and makefiles [Truta]
- Export symbols by name, not by ordinal, in win32/zlib.def [Truta]
- Add contrib/ada [Anisimkov]
- Move asm files from contrib/vstudio/vc70_32 to contrib/asm386 [Truta]
- Rename contrib/asm386 to contrib/masmx86 [Truta, Vollant]
- Add contrib/masm686 [Truta]
- Fix offsets in contrib/inflate86 and contrib/masmx86/inffas32.asm
  [Truta, Vollant]
- Update contrib/delphi; rename to contrib/pascal; add example [Truta]
- Remove contrib/delphi2; add a new contrib/delphi [Truta]
- Avoid inclusion of the nonstandard <memory.h> in contrib/iostream,
  and fix some method prototypes [Truta]
- Fix the ZCR_SEED2 constant to avoid warnings in contrib/minizip
  [Truta]
- Avoid the use of backslash (\) in contrib/minizip [Vollant]
- Fix file time handling in contrib/untgz; update makefiles [Truta]
- Update contrib/vstudio/vc70_32 to comply with the new DLL guidelines
  [Vollant]
- Remove contrib/vstudio/vc15_16 [Vollant]
- Rename contrib/vstudio/vc70_32 to contrib/vstudio/vc7 [Truta]
- Update README.contrib [Truta]
- Invert the assignment order of match_head and s->prev[...] in
  INSERT_STRING [Truta]
- Compare TOO_FAR with 32767 instead of 32768, to avoid 16-bit warnings
  [Truta]
- Compare function pointers with 0, not with NULL or Z_NULL [Truta]
- Fix prototype of syncsearch in inflate.c [Truta]
- Introduce ASMINF macro to be enabled when using an ASM implementation
  of inflate_fast [Truta]
- Change NO_DEFLATE to NO_GZCOMPRESS [Truta]
- Modify test_gzio in example.c to take a single file name as a
  parameter [Truta]
- Exit the example.c program if gzopen fails [Truta]
- Add type casts around strlen in example.c [Truta]
- Remove casting to sizeof in minigzip.c; give a proper type
  to the variable compared with SUFFIX_LEN [Truta]
- Update definitions of STDC and STDC99 in zconf.h [Truta]
- Synchronize zconf.h with the new Windows DLL interface [Truta]
- Use SYS16BIT instead of __32BIT__ to distinguish between
  16- and 32-bit platforms [Truta]
- Use far memory allocators in small 16-bit memory models for
  Turbo C [Truta]
- Add info about the use of ASMV, ASMINF and ZLIB_WINAPI in
  zlibCompileFlags [Truta]
- Cygwin has vsnprintf [Wilson]
- In Windows16, OS_CODE is 0, as in MSDOS [Truta]
- In Cygwin, OS_CODE is 3 (Unix), not 11 (Windows32) [Wilson]

Changes in 1.2.0.4 (10 August 2003)
- Minor FAQ updates
- Be more strict when checking inflateInit2's windowBits parameter
- Change NO_GUNZIP compile option to NO_GZIP to cover deflate as well
- Add gzip wrapper option to deflateInit2 using windowBits
- Add updated QNX rule in configure and qnx directory [Bonnefoy]
- Make inflate distance-too-far checks more rigorous
- Clean up FAR usage in inflate
- Add casting to sizeof() in gzio.c and minigzip.c

Changes in 1.2.0.3 (19 July 2003)
- Fix silly error in gzungetc() implementation [Vollant]
- Update contrib/minizip and contrib/vstudio [Vollant]
- Fix printf format in example.c
- Correct cdecl support in zconf.in.h [Anisimkov]
- Minor FAQ updates

Changes in 1.2.0.2 (13 July 2003)
- Add ZLIB_VERNUM in zlib.h for numerical preprocessor comparisons
- Attempt to avoid warnings in crc32.c for pointer-int conversion
- Add AIX to configure, remove aix directory [Bakker]
- Add some casts to minigzip.c
- Improve checking after insecure sprintf() or vsprintf() calls
- Remove #elif's from crc32.c
- Change leave label to inf_leave in inflate.c and infback.c to avoid
  library conflicts
- Remove inflate gzip decoding by default--only enable gzip decoding by
  special request for stricter backward compatibility
- Add zlibCompileFlags() function to return compilation information
- More typecasting in deflate.c to avoid warnings
- Remove leading underscore from _Capital #defines [Truta]
- Fix configure to link shared library when testing
- Add some Windows CE target adjustments [Mai]
- Remove #define ZLIB_DLL in zconf.h [Vollant]
- Add zlib.3 [Rodgers]
- Update RFC URL in deflate.c and algorithm.txt [Mai]
- Add zlib_dll_FAQ.txt to contrib [Truta]
- Add UL to some constants [Truta]
- Update minizip and vstudio [Vollant]
- Remove vestigial NEED_DUMMY_RETURN from zconf.in.h
- Expand use of NO_DUMMY_DECL to avoid all dummy structures
- Added iostream3 to contrib [Schwardt]
- Replace rewind() with fseek() for WinCE [Truta]
- Improve setting of zlib format compression level flags
    - Report 0 for huffman and rle strategies and for level == 0 or 1
    - Report 2 only for level == 6
- Only deal with 64K limit when necessary at compile time [Truta]
- Allow TOO_FAR check to be turned off at compile time [Truta]
- Add gzclearerr() function [Souza]
- Add gzungetc() function

Changes in 1.2.0.1 (17 March 2003)
- Add Z_RLE strategy for run-length encoding [Truta]
    - When Z_RLE requested, restrict matches to distance one
    - Update zlib.h, minigzip.c, gzopen(), gzdopen() for Z_RLE
- Correct FASTEST compilation to allow level == 0
- Clean up what gets compiled for FASTEST
- Incorporate changes to zconf.in.h [Vollant]
    - Refine detection of Turbo C need for dummy returns
    - Refine ZLIB_DLL compilation
    - Include additional header file on VMS for off_t typedef
- Try to use _vsnprintf where it supplants vsprintf [Vollant]
- Add some casts in inffast.c
- Enchance comments in zlib.h on what happens if gzprintf() tries to
  write more than 4095 bytes before compression
- Remove unused state from inflateBackEnd()
- Remove exit(0) from minigzip.c, example.c
- Get rid of all those darn tabs
- Add "check" target to Makefile.in that does the same thing as "test"
- Add "mostlyclean" and "maintainer-clean" targets to Makefile.in
- Update contrib/inflate86 [Anderson]
- Update contrib/testzlib, contrib/vstudio, contrib/minizip [Vollant]
- Add msdos and win32 directories with makefiles [Truta]
- More additions and improvements to the FAQ

Changes in 1.2.0 (9 March 2003)
- New and improved inflate code
    - About 20% faster
    - Does not allocate 32K window unless and until needed
    - Automatically detects and decompresses gzip streams
    - Raw inflate no longer needs an extra dummy byte at end
    - Added inflateBack functions using a callback interface--even faster
      than inflate, useful for file utilities (gzip, zip)
    - Added inflateCopy() function to record state for random access on
      externally generated deflate streams (e.g. in gzip files)
    - More readable code (I hope)
- New and improved crc32()
    - About 50% faster, thanks to suggestions from Rodney Brown
- Add deflateBound() and compressBound() functions
- Fix memory leak in deflateInit2()
- Permit setting dictionary for raw deflate (for parallel deflate)
- Fix const declaration for gzwrite()
- Check for some malloc() failures in gzio.c
- Fix bug in gzopen() on single-byte file 0x1f
- Fix bug in gzread() on concatenated file with 0x1f at end of buffer
  and next buffer doesn't start with 0x8b
- Fix uncompress() to return Z_DATA_ERROR on truncated input
- Free memory at end of example.c
- Remove MAX #define in trees.c (conflicted with some libraries)
- Fix static const's in deflate.c, gzio.c, and zutil.[ch]
- Declare malloc() and free() in gzio.c if STDC not defined
- Use malloc() instead of calloc() in zutil.c if int big enough
- Define STDC for AIX
- Add aix/ with approach for compiling shared library on AIX
- Add HP-UX support for shared libraries in configure
- Add OpenUNIX support for shared libraries in configure
- Use $cc instead of gcc to build shared library
- Make prefix directory if needed when installing
- Correct Macintosh avoidance of typedef Byte in zconf.h
- Correct Turbo C memory allocation when under Linux
- Use libz.a instead of -lz in Makefile (assure use of compiled library)
- Update configure to check for snprintf or vsnprintf functions and their
  return value, warn during make if using an insecure function
- Fix configure problem with compile-time knowledge of HAVE_UNISTD_H that
  is lost when library is used--resolution is to build new zconf.h
- Documentation improvements (in zlib.h):
    - Document raw deflate and inflate
    - Update RFCs URL
    - Point out that zlib and gzip formats are different
    - Note that Z_BUF_ERROR is not fatal
    - Document string limit for gzprintf() and possible buffer overflow
    - Note requirement on avail_out when flushing
    - Note permitted values of flush parameter of inflate()
- Add some FAQs (and even answers) to the FAQ
- Add contrib/inflate86/ for x86 faster inflate
- Add contrib/blast/ for PKWare Data Compression Library decompression
- Add contrib/puff/ simple inflate for deflate format description

Changes in 1.1.4 (11 March 2002)
- ZFREE was repeated on same allocation on some error conditions.
  This creates a security problem described in
  http://www.zlib.org/advisory-2002-03-11.txt
- Returned incorrect error (Z_MEM_ERROR) on some invalid data
- Avoid accesses before window for invalid distances with inflate window
  less than 32K.
- force windowBits > 8 to avoid a bug in the encoder for a window size
  of 256 bytes. (A complete fix will be available in 1.1.5).

Changes in 1.1.3 (9 July 1998)
- fix "an inflate input buffer bug that shows up on rare but persistent
  occasions" (Mark)
- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
- fix gzseek(..., SEEK_SET) in write mode
- fix crc check after a gzeek (Frank Faubert)
- fix miniunzip when the last entry in a zip file is itself a zip file
  (J Lillge)
- add contrib/asm586 and contrib/asm686 (Brian Raiter)
  See http://www.muppetlabs.com/~breadbox/software/assembly.html
- add support for Delphi 3 in contrib/delphi (Bob Dellaca)
- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
- added a FAQ file

- Support gzdopen on Mac with Metrowerks (Jason Linhart)
- Do not redefine Byte on Mac (Brad Pettit & Jason Linhart)
- define SEEK_END too if SEEK_SET is not defined (Albert Chin-A-Young)
- avoid some warnings with Borland C (Tom Tanner)
- fix a problem in contrib/minizip/zip.c for 16-bit MSDOS (Gilles Vollant)
- emulate utime() for WIN32 in contrib/untgz  (Gilles Vollant)
- allow several arguments to configure (Tim Mooney, Frodo Looijaard)
- use libdir and includedir in Makefile.in (Tim Mooney)
- support shared libraries on OSF1 V4 (Tim Mooney)
- remove so_locations in "make clean"  (Tim Mooney)
- fix maketree.c compilation error (Glenn, Mark)
- Python interface to zlib now in Python 1.5 (Jeremy Hylton)
- new Makefile.riscos (Rich Walker)
- initialize static descriptors in trees.c for embedded targets (Nick Smith)
- use "foo-gz" in example.c for RISCOS and VMS (Nick Smith)
- add the OS/2 files in Makefile.in too (Andrew Zabolotny)
- fix fdopen and halloc macros for Microsoft C 6.0 (Tom Lane)
- fix maketree.c to allow clean compilation of inffixed.h (Mark)
- fix parameter check in deflateCopy (Gunther Nikl)
- cleanup trees.c, use compressed_len only in debug mode (Christian Spieler)
- Many portability patches by Christian Spieler:
  . zutil.c, zutil.h: added "const" for zmem*
  . Make_vms.com: fixed some typos
  . Make_vms.com: msdos/Makefile.*: removed zutil.h from some dependency lists
  . msdos/Makefile.msc: remove "default rtl link library" info from obj files
  . msdos/Makefile.*: use model-dependent name for the built zlib library
  . msdos/Makefile.emx, nt/Makefile.emx, nt/Makefile.gcc:
     new makefiles, for emx (DOS/OS2), emx&rsxnt and mingw32 (Windows 9x / NT)
- use define instead of typedef for Bytef also for MSC small/medium (Tom Lane)
- replace __far with _far for better portability (Christian Spieler, Tom Lane)
- fix test for errno.h in configure (Tim Newsham)

Changes in 1.1.2 (19 March 98)
- added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant)
  See http://www.winimage.com/zLibDll/unzip.html
- preinitialize the inflate tables for fixed codes, to make the code
  completely thread safe (Mark)
- some simplifications and slight speed-up to the inflate code (Mark)
- fix gzeof on non-compressed files (Allan Schrum)
- add -std1 option in configure for OSF1 to fix gzprintf (Martin Mokrejs)
- use default value of 4K for Z_BUFSIZE for 16-bit MSDOS (Tim Wegner + Glenn)
- added os2/Makefile.def and os2/zlib.def (Andrew Zabolotny)
- add shared lib support for UNIX_SV4.2MP (MATSUURA Takanori)
- do not wrap extern "C" around system includes (Tom Lane)
- mention zlib binding for TCL in README (Andreas Kupries)
- added amiga/Makefile.pup for Amiga powerUP SAS/C PPC (Andreas Kleinert)
- allow "make install prefix=..." even after configure (Glenn Randers-Pehrson)
- allow "configure --prefix $HOME" (Tim Mooney)
- remove warnings in example.c and gzio.c (Glenn Randers-Pehrson)
- move Makefile.sas to amiga/Makefile.sas

Changes in 1.1.1 (27 Feb 98)
- fix macros _tr_tally_* in deflate.h for debug mode  (Glenn Randers-Pehrson)
- remove block truncation heuristic which had very marginal effect for zlib
  (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
  compression ratio on some files. This also allows inlining _tr_tally for
  matches in deflate_slow.
- added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)

Changes in 1.1.0 (24 Feb 98)
- do not return STREAM_END prematurely in inflate (John Bowler)
- revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
- compile with -DFASTEST to get compression code optimized for speed only
- in minigzip, try mmap'ing the input file first (Miguel Albrecht)
- increase size of I/O buffers in minigzip.c and gzio.c (not a big gain
  on Sun but significant on HP)

- add a pointer to experimental unzip library in README (Gilles Vollant)
- initialize variable gcc in configure (Chris Herborth)

Changes in 1.0.9 (17 Feb 1998)
- added gzputs and gzgets functions
- do not clear eof flag in gzseek (Mark Diekhans)
- fix gzseek for files in transparent mode (Mark Diekhans)
- do not assume that vsprintf returns the number of bytes written (Jens Krinke)
- replace EXPORT with ZEXPORT to avoid conflict with other programs
- added compress2 in zconf.h, zlib.def, zlib.dnt
- new asm code from Gilles Vollant in contrib/asm386
- simplify the inflate code (Mark):
 . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new()
 . ZALLOC the length list in inflate_trees_fixed() instead of using stack
 . ZALLOC the value area for huft_build() instead of using stack
 . Simplify Z_FINISH check in inflate()

- Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8
- in inftrees.c, avoid cc -O bug on HP (Farshid Elahi)
- in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with
  the declaration of FAR (Gilles VOllant)
- install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann)
- read_buf buf parameter of type Bytef* instead of charf*
- zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout)
- do not redeclare unlink in minigzip.c for WIN32 (John Bowler)
- fix check for presence of directories in "make install" (Ian Willis)

Changes in 1.0.8 (27 Jan 1998)
- fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)
- fix gzgetc and gzputc for big endian systems (Markus Oberhumer)
- added compress2() to allow setting the compression level
- include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
- use constant arrays for the static trees in trees.c instead of computing
  them at run time (thanks to Ken Raeburn for this suggestion). To create
  trees.h, compile with GEN_TREES_H and run "make test".
- check return code of example in "make test" and display result
- pass minigzip command line options to file_compress
- simplifying code of inflateSync to avoid gcc 2.8 bug

- support CC="gcc -Wall" in configure -s (QingLong)
- avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)
- fix test for shared library support to avoid compiler warnings
- zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)
- check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)
- do not use fdopen for Metrowerks on Mac (Brad Pettit))
- add checks for gzputc and gzputc in example.c
- avoid warnings in gzio.c and deflate.c (Andreas Kleinert)
- use const for the CRC table (Ken Raeburn)
- fixed "make uninstall" for shared libraries
- use Tracev instead of Trace in infblock.c
- in example.c use correct compressed length for test_sync
- suppress +vnocompatwarnings in configure for HPUX (not always supported)

Changes in 1.0.7 (20 Jan 1998)
- fix gzseek which was broken in write mode
- return error for gzseek to negative absolute position
- fix configure for Linux (Chun-Chung Chen)
- increase stack space for MSC (Tim Wegner)
- get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)
- define EXPORTVA for gzprintf (Gilles Vollant)
- added man page zlib.3 (Rick Rodgers)
- for contrib/untgz, fix makedir() and improve Makefile

- check gzseek in write mode in example.c
- allocate extra buffer for seeks only if gzseek is actually called
- avoid signed/unsigned comparisons (Tim Wegner, Gilles Vollant)
- add inflateSyncPoint in zconf.h
- fix list of exported functions in nt/zlib.dnt and mdsos/zlib.def

Changes in 1.0.6 (19 Jan 1998)
- add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and
  gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code)
- Fix a deflate bug occurring only with compression level 0 (thanks to
  Andy Buckler for finding this one).
- In minigzip, pass transparently also the first byte for .Z files.
- return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress()
- check Z_FINISH in inflate (thanks to Marc Schluper)
- Implement deflateCopy (thanks to Adam Costello)
- make static libraries by default in configure, add --shared option.
- move MSDOS or Windows specific files to directory msdos
- suppress the notion of partial flush to simplify the interface
  (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4)
- suppress history buffer provided by application to simplify the interface
  (this feature was not implemented anyway in 1.0.4)
- next_in and avail_in must be initialized before calling inflateInit or
  inflateInit2
- add EXPORT in all exported functions (for Windows DLL)
- added Makefile.nt (thanks to Stephen Williams)
- added the unsupported "contrib" directory:
   contrib/asm386/ by Gilles Vollant <info@winimage.com>
        386 asm code replacing longest_match().
   contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
        A C++ I/O streams interface to the zlib gz* functions
   contrib/iostream2/  by Tyge Løvset <Tyge.Lovset@cmr.no>
        Another C++ I/O streams interface
   contrib/untgz/  by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
        A very simple tar.gz file extractor using zlib
   contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
        How to use compress(), uncompress() and the gz* functions from VB.
- pass params -f (filtered data), -h (huffman only), -1 to -9 (compression
  level) in minigzip (thanks to Tom Lane)

- use const for rommable constants in deflate
- added test for gzseek and gztell in example.c
- add undocumented function inflateSyncPoint() (hack for Paul Mackerras)
- add undocumented function zError to convert error code to string
  (for Tim Smithers)
- Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code.
- Use default memcpy for Symantec MSDOS compiler.
- Add EXPORT keyword for check_func (needed for Windows DLL)
- add current directory to LD_LIBRARY_PATH for "make test"
- create also a link for libz.so.1
- added support for FUJITSU UXP/DS (thanks to Toshiaki Nomura)
- use $(SHAREDLIB) instead of libz.so in Makefile.in (for HPUX)
- added -soname for Linux in configure (Chun-Chung Chen,
- assign numbers to the exported functions in zlib.def (for Windows DLL)
- add advice in zlib.h for best usage of deflateSetDictionary
- work around compiler bug on Atari (cast Z_NULL in call of s->checkfn)
- allow compilation with ANSI keywords only enabled for TurboC in large model
- avoid "versionString"[0] (Borland bug)
- add NEED_DUMMY_RETURN for Borland
- use variable z_verbose for tracing in debug mode (L. Peter Deutsch).
- allow compilation with CC
- defined STDC for OS/2 (David Charlap)
- limit external names to 8 chars for MVS (Thomas Lund)
- in minigzip.c, use static buffers only for 16-bit systems
- fix suffix check for "minigzip -d foo.gz"
- do not return an error for the 2nd of two consecutive gzflush() (Felix Lee)
- use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau)
- added makelcc.bat for lcc-win32 (Tom St Denis)
- in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
- Avoid expanded $Id: ChangeLog,v 1.4 2010/04/20 14:50:10 nijtmans Exp $. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
- check for unistd.h in configure (for off_t)
- remove useless check parameter in inflate_blocks_free
- avoid useless assignment of s->check to itself in inflate_blocks_new
- do not flush twice in gzclose (thanks to Ken Raeburn)
- rename FOPEN as F_OPEN to avoid clash with /usr/include/sys/file.h
- use NO_ERRNO_H instead of enumeration of operating systems with errno.h
- work around buggy fclose on pipes for HP/UX
- support zlib DLL with BORLAND C++ 5.0 (thanks to Glenn Randers-Pehrson)
- fix configure if CC is already equal to gcc

Changes in 1.0.5 (3 Jan 98)
- Fix inflate to terminate gracefully when fed corrupted or invalid data
- Use const for rommable constants in inflate
- Eliminate memory leaks on error conditions in inflate
- Removed some vestigial code in inflate
- Update web address in README

Changes in 1.0.4 (24 Jul 96)
- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
  bit, so the decompressor could decompress all the correct data but went
  on to attempt decompressing extra garbage data. This affected minigzip too.
- zlibVersion and gzerror return const char* (needed for DLL)
- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
- use z_error only for DEBUG (avoid problem with DLLs)

Changes in 1.0.3 (2 Jul 96)
- use z_streamp instead of z_stream *, which is now a far pointer in MSDOS
  small and medium models; this makes the library incompatible with previous
  versions for these models. (No effect in large model or on other systems.)
- return OK instead of BUF_ERROR if previous deflate call returned with
  avail_out as zero but there is nothing to do
- added memcmp for non STDC compilers
- define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly)
- define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO)
- better check for 16-bit mode MSC (avoids problem with Symantec)

Changes in 1.0.2 (23 May 96)
- added Windows DLL support
- added a function zlibVersion (for the DLL support)
- fixed declarations using Bytef in infutil.c (pb with MSDOS medium model)
- Bytef is define's instead of typedef'd only for Borland C
- avoid reading uninitialized memory in example.c
- mention in README that the zlib format is now RFC1950
- updated Makefile.dj2
- added algorithm.doc

Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]
- fix array overlay in deflate.c which sometimes caused bad compressed data
- fix inflate bug with empty stored block
- fix MSDOS medium model which was broken in 0.99
- fix deflateParams() which could generated bad compressed data.
- Bytef is define'd instead of typedef'ed (work around Borland bug)
- added an INDEX file
- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
  Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
- speed up adler32 for modern machines without auto-increment
- added -ansi for IRIX in configure
- static_init_done in trees.c is an int
- define unlink as delete for VMS
- fix configure for QNX
- add configure branch for SCO and HPUX
- avoid many warnings (unused variables, dead assignments, etc...)
- no fdopen for BeOS
- fix the Watcom fix for 32 bit mode (define FAR as empty)
- removed redefinition of Byte for MKWERKS
- work around an MWKERKS bug (incorrect merge of all .h files)

Changes in 0.99 (27 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
- fix the final (:-) bug for deflate with flush (output was correct but
  not completely flushed in rare occasions).
- default window size is same for compression and decompression
  (it's now sufficient to set MAX_WBITS in zconf.h).
- voidp -> voidpf and voidnp -> voidp (for consistency with other
  typedefs and because voidnp was not near in large model).

Changes in 0.94 (13 Aug 95)
- support MSDOS medium model
- fix deflate with flush (could sometimes generate bad output)
- fix deflateReset (zlib header was incorrectly suppressed)
- added support for VMS
- allow a compression level in gzopen()
- gzflush now calls fflush
- For deflate with flush, flush even if no more input is provided.
- rename libgz.a as libz.a
- avoid complex expression in infcodes.c triggering Turbo C bug
- work around a problem with gcc on Alpha (in INSERT_STRING)
- don't use inline functions (problem with some gcc versions)
- allow renaming of Byte, uInt, etc... with #define.
- avoid warning about (unused) pointer before start of array in deflate.c
- avoid various warnings in gzio.c, example.c, infblock.c, adler32.c, zutil.c
- avoid reserved word 'new' in trees.c

Changes in 0.93 (25 June 95)
- temporarily disable inline functions
- make deflate deterministic
- give enough lookahead for PARTIAL_FLUSH
- Set binary mode for stdin/stdout in minigzip.c for OS/2
- don't even use signed char in inflate (not portable enough)
- fix inflate memory leak for segmented architectures

Changes in 0.92 (3 May 95)
- don't assume that char is signed (problem on SGI)
- Clear bit buffer when starting a stored block
- no memcpy on Pyramid
- suppressed inftest.c
- optimized fill_window, put longest_match inline for gcc
- optimized inflate on stored blocks.
- untabify all sources to simplify patches

Changes in 0.91 (2 May 95)
- Default MEM_LEVEL is 8 (not 9 for Unix) as documented in zlib.h
- Document the memory requirements in zconf.h
- added "make install"
- fix sync search logic in inflateSync
- deflate(Z_FULL_FLUSH) now works even if output buffer too short
- after inflateSync, don't scare people with just "lo world"
- added support for DJGPP

Changes in 0.9 (1 May 95)
- don't assume that zalloc clears the allocated memory (the TurboC bug
  was Mark's bug after all :)
- let again gzread copy uncompressed data unchanged (was working in 0.71)
- deflate(Z_FULL_FLUSH), inflateReset and inflateSync are now fully implemented
- added a test of inflateSync in example.c
- moved MAX_WBITS to zconf.h because users might want to change that.
- document explicitly that zalloc(64K) on MSDOS must return a normalized
  pointer (zero offset)
- added Makefiles for Microsoft C, Turbo C, Borland C++
- faster crc32()

Changes in 0.8 (29 April 95)
- added fast inflate (inffast.c)
- deflate(Z_FINISH) now returns Z_STREAM_END when done. Warning: this
  is incompatible with previous versions of zlib which returned Z_OK.
- work around a TurboC compiler bug (bad code for b << 0, see infutil.h)
  (actually that was not a compiler bug, see 0.81 above)
- gzread no longer reads one extra byte in certain cases
- In gzio destroy(), don't reference a freed structure
- avoid many warnings for MSDOS
- avoid the ERROR symbol which is used by MS Windows

Changes in 0.71 (14 April 95)
- Fixed more MSDOS compilation problems :( There is still a bug with
  TurboC large model.

Changes in 0.7 (14 April 95)
- Added full inflate support.
- Simplified the crc32() interface. The pre- and post-conditioning
  (one's complement) is now done inside crc32(). WARNING: this is
  incompatible with previous versions; see zlib.h for the new usage.

Changes in 0.61 (12 April 95)
- workaround for a bug in TurboC. example and minigzip now work on MSDOS.

Changes in 0.6 (11 April 95)
- added minigzip.c
- added gzdopen to reopen a file descriptor as gzFile
- added transparent reading of non-gziped files in gzread.
- fixed bug in gzread (don't read crc as data)
- fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose).
- don't allocate big arrays in the stack (for MSDOS)
- fix some MSDOS compilation problems

Changes in 0.5:
- do real compression in deflate.c. Z_PARTIAL_FLUSH is supported but
  not yet Z_FULL_FLUSH.
- support decompression but only in a single step (forced Z_FINISH)
- added opaque object for zalloc and zfree.
- added deflateReset and inflateReset
- added a variable zlib_version for consistency checking.
- renamed the 'filter' parameter of deflateInit2 as 'strategy'.
  Added Z_FILTERED and Z_HUFFMAN_ONLY constants.

Changes in 0.4:
- avoid "zip" everywhere, use zlib instead of ziplib.
- suppress Z_BLOCK_FLUSH, interpret Z_PARTIAL_FLUSH as block flush
  if compression method == 8.
- added adler32 and crc32
- renamed deflateOptions as deflateInit2, call one or the other but not both
- added the method parameter for deflateInit2.
- added inflateInit2
- simplied considerably deflateInit and inflateInit by not supporting
  user-provided history buffer. This is supported only in deflateInit2
  and inflateInit2.

Changes in 0.3:
- prefix all macro names with Z_
- use Z_FINISH instead of deflateEnd to finish compression.
- added Z_HUFFMAN_ONLY
- added gzerror()