Tcl Source Code

2012-04-09  Donal K. Fellows  <[email protected]>

	* generic/tclOODefineCmds.c (ClassVarsSet, ObjVarsSet): [Bug 3396896]:
	Ensure that the lists of variable names used to drive variable
	resolution will never have the same name twice.

	* generic/tclVar.c (AppendLocals): [Bug 2712377]: Fix problem with

'\"
'\" Copyright (c) 1998-1999 Scriptics Corporation
'\" Copyright (c) 1995-1997 Sun Microsystems, Inc.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\" 
.so man.macros
.TH Notifier 3 8.1 Tcl "Tcl Library Procedures"
.BS
.SH NAME
Tcl_CreateEventSource, Tcl_DeleteEventSource, Tcl_SetMaxBlockTime, Tcl_QueueEvent, Tcl_ThreadQueueEvent, Tcl_ThreadAlert, Tcl_GetCurrentThread, Tcl_DeleteEvents, Tcl_InitNotifier, Tcl_FinalizeNotifier, Tcl_WaitForEvent, Tcl_AlertNotifier, Tcl_SetTimer, Tcl_ServiceAll, Tcl_ServiceEvent, Tcl_GetServiceMode, Tcl_SetServiceMode \- the event queue and notifier interfaces
.SH SYNOPSIS
.nf
\fB#include <tcl.h>\fR
.sp
void
\fBTcl_CreateEventSource\fR(\fIsetupProc, checkProc, clientData\fR)
.sp

#endif
#if defined(__GNUC__) && (__GNUC__ > 2)
#   define TCL_FORMAT_PRINTF(a,b) __attribute__ ((__format__ (__printf__, a, b)))
#else
#   define TCL_FORMAT_PRINTF(a,b)
#endif


















/*
 *----------------------------------------------------------------------------
 * Macros used to declare a function to be exported by a DLL. Used by Windows,
 * maps to no-op declarations on non-Windows systems. The default build on
 * windows is for a DLL, which causes the DLLIMPORT and DLLEXPORT macros to be
 * nonempty. To build a static library, the macro STATIC_BUILD should be
 * defined.

 * accessed with Tcl_GetObjResult() and Tcl_SetObjResult().
 */

typedef struct Tcl_Interp {
    /* TIP #330: Strongly discourage extensions from using the string
     * result. */
#ifdef USE_INTERP_RESULT

    char *result;		/* If the last command returned a string
				 * result, this points to it. */
    void (*freeProc) (char *blockPtr);

				/* Zero means the string result is statically
				 * allocated. TCL_DYNAMIC means it was
				 * allocated with ckalloc and should be freed
				 * with ckfree. Other values give the address
				 * of function to invoke to free the result.
				 * Tcl_Eval must free it before executing next
				 * command. */
#else
    char *unused3;
    void (*unused4) (char *);
#endif
#ifdef USE_INTERP_ERRORLINE

    int errorLine;		/* When TCL_ERROR is returned, this gives the
				 * line number within the command where the
				 * error occurred (1 if first line). */
#else
    int unused5;
#endif
} Tcl_Interp;

typedef struct Tcl_AsyncHandler_ *Tcl_AsyncHandler;
typedef struct Tcl_Channel_ *Tcl_Channel;
typedef struct Tcl_ChannelTypeVersion_ *Tcl_ChannelTypeVersion;
typedef struct Tcl_Command_ *Tcl_Command;

 */

#include "tclInt.h"
#if !defined(TCL_THREADS) || !defined(USE_THREAD_ALLOC)

#if USE_TCLALLOC

#ifdef TCL_DEBUG
#   define DEBUG
/* #define MSTATS */
#   define RCHECK
#endif

/*
 * We should really make use of AC_CHECK_TYPE(caddr_t) here, but it can wait
 * until Tcl uses config.h properly.
 */

#if defined(_MSC_VER) || defined(__MINGW32__) || defined(__BORLANDC__)
typedef unsigned long caddr_t;

    union overhead *next;		/* when free */
    unsigned char padding[TCL_ALLOCALIGN];	/* align struct to TCL_ALLOCALIGN bytes */
    struct {
	unsigned char magic0;		/* magic number */
	unsigned char index;		/* bucket # */
	unsigned char unused;		/* unused */
	unsigned char magic1;		/* other magic number */
#ifdef RCHECK
	unsigned short rmagic;		/* range magic number */
	unsigned long size;		/* actual block size */
	unsigned short unused2;		/* padding to 8-byte align */
#endif
    } ovu;
#define overMagic0	ovu.magic0
#define overMagic1	ovu.magic1
#define bucketIndex	ovu.index
#define rangeCheckMagic	ovu.rmagic
#define realBlockSize	ovu.size
};


#define MAGIC		0xef	/* magic # on accounting info */
#define RMAGIC		0x5555	/* magic # on range info */

#ifdef RCHECK
#define	RSLOP		sizeof(unsigned short)
#else
#define	RSLOP		0
#endif

#define OVERHEAD (sizeof(union overhead) + RSLOP)

 * numMallocs[i] is the difference between the number of mallocs and frees for
 * a given block size.
 */

static	unsigned int numMallocs[NBUCKETS+1];
#endif

#if defined(DEBUG) || defined(RCHECK)
#define	ASSERT(p)	if (!(p)) Tcl_Panic(# p)
#define RANGE_ASSERT(p) if (!(p)) Tcl_Panic(# p)
#else
#define	ASSERT(p)
#define RANGE_ASSERT(p)
#endif

	overPtr = (union overhead *) (bigBlockPtr + 1);
	overPtr->overMagic0 = overPtr->overMagic1 = MAGIC;
	overPtr->bucketIndex = 0xff;
#ifdef MSTATS
	numMallocs[NBUCKETS]++;
#endif

#ifdef RCHECK
	/*
	 * Record allocated size of block and bound space with magic numbers.
	 */

	overPtr->realBlockSize = (numBytes + RSLOP - 1) & ~(RSLOP - 1);
	overPtr->rangeCheckMagic = RMAGIC;
	BLOCK_END(overPtr) = RMAGIC;

    overPtr->overMagic0 = overPtr->overMagic1 = MAGIC;
    overPtr->bucketIndex = (unsigned char) bucket;

#ifdef MSTATS
    numMallocs[bucket]++;
#endif

#ifdef RCHECK
    /*
     * Record allocated size of block and bound space with magic numbers.
     */

    overPtr->realBlockSize = (numBytes + RSLOP - 1) & ~(RSLOP - 1);
    overPtr->rangeCheckMagic = RMAGIC;
    BLOCK_END(overPtr) = RMAGIC;

	overPtr = (union overhead *) (bigBlockPtr + 1);

#ifdef MSTATS
	numMallocs[NBUCKETS]++;
#endif

#ifdef RCHECK
	/*
	 * Record allocated size of block and update magic number bounds.
	 */

	overPtr->realBlockSize = (numBytes + RSLOP - 1) & ~(RSLOP - 1);
	BLOCK_END(overPtr) = RMAGIC;
#endif

	return newPtr;
    }

    /*
     * Ok, we don't have to copy, it fits as-is
     */

#ifdef RCHECK
    overPtr->realBlockSize = (numBytes + RSLOP - 1) & ~(RSLOP - 1);
    BLOCK_END(overPtr) = RMAGIC;
#endif

    Tcl_MutexUnlock(allocMutexPtr);
    return(oldPtr);
}

    Tcl_SetVar(interp, "tcl_patchLevel", TCL_PATCH_LEVEL, TCL_GLOBAL_ONLY);
    Tcl_SetVar(interp, "tcl_version", TCL_VERSION, TCL_GLOBAL_ONLY);
    Tcl_TraceVar2(interp, "tcl_precision", NULL,
	    TCL_GLOBAL_ONLY|TCL_TRACE_READS|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
	    TclPrecTraceProc, NULL);
    TclpSetVariables(interp);

#ifdef TCL_THREADS
    /*
     * The existence of the "threaded" element of the tcl_platform array
     * indicates that this particular Tcl shell has been compiled with threads
     * turned on. Using "info exists tcl_platform(threaded)" a Tcl script can
     * introspect on the interpreter level of thread safety.
     */

    Tcl_SetVar2(interp, "tcl_platform", "threaded", "1", TCL_GLOBAL_ONLY);
#endif

    /*
     * Register Tcl's version number.
     * TIP #268: Full patchlevel instead of just major.minor
     */

    Tcl_PkgProvideEx(interp, "Tcl", TCL_PATCH_LEVEL, &tclStubs);

    unsigned long TclpGetSeconds(void)
}

# deprecated
declare 77 {
    void TclpGetTime(Tcl_Time *time)
}

declare 78 {
    int TclpGetTimeZone(unsigned long time)
}

# Replaced by Tcl_FSListVolumes in 8.4:
#declare 79 {
#    int TclpListVolumes(Tcl_Interp *interp)
#}
# Replaced by Tcl_FSOpenFileChannel in 8.4:
#declare 80 {
#    Tcl_Channel TclpOpenFileChannel(Tcl_Interp *interp, char *fileName,

#    void TclpAsyncMark(Tcl_AsyncHandler async)
#}

# Added in 8.1:
declare 22 win {
    TclFile TclpCreateTempFile(const char *contents)
}

declare 23 win {
    char *TclpGetTZName(int isdst)
}

declare 24 win {
    char *TclWinNoBackslash(char *path)
}
# replaced by generic TclGetPlatform
#declare 25 win {
#    TclPlatformType *TclWinGetPlatform(void)
#}

EXTERN void		TclpFree(char *ptr);
/* 75 */
EXTERN unsigned long	TclpGetClicks(void);
/* 76 */
EXTERN unsigned long	TclpGetSeconds(void);
/* 77 */
EXTERN void		TclpGetTime(Tcl_Time *time);
/* 78 */
EXTERN int		TclpGetTimeZone(unsigned long time);
/* Slot 79 is reserved */
/* Slot 80 is reserved */
/* 81 */
EXTERN char *		TclpRealloc(char *ptr, unsigned int size);
/* Slot 82 is reserved */
/* Slot 83 is reserved */
/* Slot 84 is reserved */

    void (*reserved71)(void);
    void (*reserved72)(void);
    void (*reserved73)(void);
    void (*tclpFree) (char *ptr); /* 74 */
    unsigned long (*tclpGetClicks) (void); /* 75 */
    unsigned long (*tclpGetSeconds) (void); /* 76 */
    void (*tclpGetTime) (Tcl_Time *time); /* 77 */
    int (*tclpGetTimeZone) (unsigned long time); /* 78 */
    void (*reserved79)(void);
    void (*reserved80)(void);
    char * (*tclpRealloc) (char *ptr, unsigned int size); /* 81 */
    void (*reserved82)(void);
    void (*reserved83)(void);
    void (*reserved84)(void);
    void (*reserved85)(void);

	(tclIntStubsPtr->tclpFree) /* 74 */
#define TclpGetClicks \
	(tclIntStubsPtr->tclpGetClicks) /* 75 */
#define TclpGetSeconds \
	(tclIntStubsPtr->tclpGetSeconds) /* 76 */
#define TclpGetTime \
	(tclIntStubsPtr->tclpGetTime) /* 77 */
#define TclpGetTimeZone \
	(tclIntStubsPtr->tclpGetTimeZone) /* 78 */
/* Slot 79 is reserved */
/* Slot 80 is reserved */
#define TclpRealloc \
	(tclIntStubsPtr->tclpRealloc) /* 81 */
/* Slot 82 is reserved */
/* Slot 83 is reserved */
/* Slot 84 is reserved */

/* 19 */
EXTERN TclFile		TclpOpenFile(const char *fname, int mode);
/* 20 */
EXTERN void		TclWinAddProcess(HANDLE hProcess, DWORD id);
/* Slot 21 is reserved */
/* 22 */
EXTERN TclFile		TclpCreateTempFile(const char *contents);
/* 23 */
EXTERN char *		TclpGetTZName(int isdst);
/* 24 */
EXTERN char *		TclWinNoBackslash(char *path);
/* Slot 25 is reserved */
/* 26 */
EXTERN void		TclWinSetInterfaces(int wide);
/* 27 */
EXTERN void		TclWinFlushDirtyChannels(void);

    void (*reserved16)(void);
    void (*reserved17)(void);
    TclFile (*tclpMakeFile) (Tcl_Channel channel, int direction); /* 18 */
    TclFile (*tclpOpenFile) (const char *fname, int mode); /* 19 */
    void (*tclWinAddProcess) (HANDLE hProcess, DWORD id); /* 20 */
    void (*reserved21)(void);
    TclFile (*tclpCreateTempFile) (const char *contents); /* 22 */
    char * (*tclpGetTZName) (int isdst); /* 23 */
    char * (*tclWinNoBackslash) (char *path); /* 24 */
    void (*reserved25)(void);
    void (*tclWinSetInterfaces) (int wide); /* 26 */
    void (*tclWinFlushDirtyChannels) (void); /* 27 */
    void (*tclWinResetInterfaces) (void); /* 28 */
    int (*tclWinCPUID) (unsigned int index, unsigned int *regs); /* 29 */
#endif /* WIN */

#define TclpOpenFile \
	(tclIntPlatStubsPtr->tclpOpenFile) /* 19 */
#define TclWinAddProcess \
	(tclIntPlatStubsPtr->tclWinAddProcess) /* 20 */
/* Slot 21 is reserved */
#define TclpCreateTempFile \
	(tclIntPlatStubsPtr->tclpCreateTempFile) /* 22 */
#define TclpGetTZName \
	(tclIntPlatStubsPtr->tclpGetTZName) /* 23 */
#define TclWinNoBackslash \
	(tclIntPlatStubsPtr->tclWinNoBackslash) /* 24 */
/* Slot 25 is reserved */
#define TclWinSetInterfaces \
	(tclIntPlatStubsPtr->tclWinSetInterfaces) /* 26 */
#define TclWinFlushDirtyChannels \
	(tclIntPlatStubsPtr->tclWinFlushDirtyChannels) /* 27 */

 *
 * - TCL_THREADS		OSCMa compilation as threaded core.
 * - TCL_MEM_DEBUG		OSCMa memory debugging.
 * - TCL_COMPILE_DEBUG		OSCMa debugging of bytecode compiler.
 * - TCL_COMPILE_STATS		OSCMa bytecode compiler statistics.
 *
 * - TCL_CFG_DO64BIT		NSCMdt tcl is compiled for a 64bit system.
 * - TCL_CFG_DEBUG		NSCMdt tcl is compiled with symbol info on.
 * - TCL_CFG_OPTIMIZED		NSCMdt tcl is compiled with cc optimizations on
 * - TCL_CFG_PROFILED		NSCMdt tcl is compiled with profiling info.
 *
 * - CFG_RUNTIME_*		Paths to various stuff at runtime.
 * - CFG_INSTALL_*		Paths to various stuff at installation time.
 *
 * - TCL_CFGVAL_ENCODING	string containing the encoding used for the

#ifdef TCL_CFG_DO64BIT
#  define CFG_64		"1"
#else
#  define CFG_64		"0"
#endif

#ifdef TCL_CFG_DEBUG
#  define CFG_DEBUG		"1"
#else
#  define CFG_DEBUG		"0"
#endif

#ifdef TCL_CFG_OPTIMIZED
#  define CFG_OPTIMIZED		"1"

    0, /* 71 */
    0, /* 72 */
    0, /* 73 */
    TclpFree, /* 74 */
    TclpGetClicks, /* 75 */
    TclpGetSeconds, /* 76 */
    TclpGetTime, /* 77 */
    TclpGetTimeZone, /* 78 */
    0, /* 79 */
    0, /* 80 */
    TclpRealloc, /* 81 */
    0, /* 82 */
    0, /* 83 */
    0, /* 84 */
    0, /* 85 */

    0, /* 16 */
    0, /* 17 */
    TclpMakeFile, /* 18 */
    TclpOpenFile, /* 19 */
    TclWinAddProcess, /* 20 */
    0, /* 21 */
    TclpCreateTempFile, /* 22 */
    TclpGetTZName, /* 23 */
    TclWinNoBackslash, /* 24 */
    0, /* 25 */
    TclWinSetInterfaces, /* 26 */
    TclWinFlushDirtyChannels, /* 27 */
    TclWinResetInterfaces, /* 28 */
    TclWinCPUID, /* 29 */
#endif /* WIN */

if {![package vsatisfies [package provide Tcl] 8]} {return}
if {[string compare $::tcl_platform(platform) windows]} {return}
if {[info exists ::tcl_platform(debug)]} {
    package ifneeded dde 1.3.2 [list load [file join $dir tcldde13g.dll] dde]
} else {
    package ifneeded dde 1.3.2 [list load [file join $dir tcldde13.dll] dde]
}

if {![package vsatisfies [package provide Tcl] 8]} {return}
if {[string compare $::tcl_platform(platform) windows]} {return}
if {[info exists ::tcl_platform(debug)]} {
    package ifneeded registry 1.3 \
            [list load [file join $dir tclreg13g.dll] registry]
} else {
    package ifneeded registry 1.3 \
            [list load [file join $dir tclreg13.dll] registry]
}

if {[lsearch [namespace children] ::tcltest] == -1} {
    package require tcltest
    namespace import -force ::tcltest::*
}

testConstraint testasync [llength [info commands testasync]]
testConstraint threaded [expr {
    [info exists ::tcl_platform(threaded)] && $::tcl_platform(threaded)
}]

proc async1 {result code} {
    global aresult acode
    set aresult $result
    set acode $code
    return "new result"
}

    namespace import -force ::tcltest::*
}

testConstraint testWinCPUID [llength [info commands testwincpuid]]

test platform-1.1 {TclpSetVariables: tcl_platform} {
    interp create i
    i eval {catch {unset tcl_platform(debug)}}
    i eval {catch {unset tcl_platform(threaded)}}
    set result [i eval {lsort [array names tcl_platform]}]
    interp delete i
    set result
} {byteOrder machine os osVersion pathSeparator platform pointerSize user wordSize}

# Test assumes twos-complement arithmetic, which is true of virtually
# everything these days.  Note that this does *not* use wide(), and

}

# When run in a Tk shell, these tests hang.
testConstraint noTk [expr {0 != [catch {package present Tk}]}]
testConstraint thread [expr {0 == [catch {package require Thread 2.6}]}]
# Darwin always uses a threaded notifier
testConstraint unthreaded [expr {
    (![info exist tcl_platform(threaded)] || !$tcl_platform(threaded))
    && $tcl_platform(os) ne "Darwin"
}]

# The next two tests will hang if threads are enabled because the notifier
# will not necessarily wait for ever in this case, so it does not generate
# an error.
test unixNotfy-1.1 {Tcl_DeleteFileHandler} -constraints {noTk unix unthreaded} -body {

# Part of Tcl's configuration information are the paths where it was installed
# and where it will look for its libraries (which can be different). We derive
# this information from the variables which can be overridden by the user. As
# every path can be configured separately we do not remember one general
# prefix/exec_prefix but all the different paths individually.

tclPkgConfig.o: $(GENERIC_DIR)/tclPkgConfig.c
	$(CC)	-c $(CC_SWITCHES)					\
		-DCFG_INSTALL_LIBDIR="\"$(LIB_INSTALL_DIR)\"" \
		-DCFG_INSTALL_BINDIR="\"$(BIN_INSTALL_DIR)\"" \
		-DCFG_INSTALL_SCRDIR="\"$(SCRIPT_INSTALL_DIR)\"" \
		-DCFG_INSTALL_INCDIR="\"$(INCLUDE_INSTALL_DIR)\"" \
		-DCFG_INSTALL_DOCDIR="\"$(MAN_INSTALL_DIR)\"" \
		\
		-DCFG_RUNTIME_LIBDIR="\"$(libdir)\"" \

tclUtf.o: $(GENERIC_DIR)/tclUtf.c $(GENERIC_DIR)/tclUniData.c
	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tclUtf.c

tclVar.o: $(GENERIC_DIR)/tclVar.c
	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tclVar.c

tclZlib.o: $(GENERIC_DIR)/tclZlib.c
	$(CC) -c $(ZLIB_INCLUDE) $(CC_SWITCHES) $(GENERIC_DIR)/tclZlib.c

tclTest.o: $(GENERIC_DIR)/tclTest.c $(IOHDR) $(TCLREHDRS)
	$(CC) -c $(APP_CC_SWITCHES) $(GENERIC_DIR)/tclTest.c

tclTestObj.o: $(GENERIC_DIR)/tclTestObj.c $(MATHHDRS)
	$(CC) -c $(APP_CC_SWITCHES) $(GENERIC_DIR)/tclTestObj.c

  tcl_ok=no
fi;
# FIXME: Currently, LDFLAGS_DEFAULT is not used, it should work like CFLAGS_DEFAULT.
    DBGX=""
    if test "$tcl_ok" = "no"; then
	CFLAGS_DEFAULT='$(CFLAGS_OPTIMIZE)'
	LDFLAGS_DEFAULT='$(LDFLAGS_OPTIMIZE)'





	echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6

cat >>confdefs.h <<\_ACEOF
#define TCL_CFG_OPTIMIZED 1
_ACEOF

    else
	CFLAGS_DEFAULT='$(CFLAGS_DEBUG)'
	LDFLAGS_DEFAULT='$(LDFLAGS_DEBUG)'
	if test "$tcl_ok" = "yes"; then
	    echo "$as_me:$LINENO: result: yes (standard debugging)" >&5
echo "${ECHO_T}yes (standard debugging)" >&6
	fi
    fi


    ### FIXME: Surely TCL_CFG_DEBUG should be set to whether we're debugging?

cat >>confdefs.h <<\_ACEOF
#define TCL_CFG_DEBUG 1
_ACEOF


    if test "$tcl_ok" = "mem" -o "$tcl_ok" = "all"; then

cat >>confdefs.h <<\_ACEOF
#define TCL_MEM_DEBUG 1
_ACEOF

	    [build with debugging symbols (default: off)]),
	[tcl_ok=$enableval], [tcl_ok=no])
# FIXME: Currently, LDFLAGS_DEFAULT is not used, it should work like CFLAGS_DEFAULT.
    DBGX=""
    if test "$tcl_ok" = "no"; then
	CFLAGS_DEFAULT='$(CFLAGS_OPTIMIZE)'
	LDFLAGS_DEFAULT='$(LDFLAGS_OPTIMIZE)'

	AC_MSG_RESULT([no])
	AC_DEFINE(TCL_CFG_OPTIMIZED, 1, [Is this an optimized build?])
    else
	CFLAGS_DEFAULT='$(CFLAGS_DEBUG)'
	LDFLAGS_DEFAULT='$(LDFLAGS_DEBUG)'
	if test "$tcl_ok" = "yes"; then
	    AC_MSG_RESULT([yes (standard debugging)])
	fi
    fi
    AC_SUBST(CFLAGS_DEFAULT)
    AC_SUBST(LDFLAGS_DEFAULT)
    ### FIXME: Surely TCL_CFG_DEBUG should be set to whether we're debugging?
    AC_DEFINE(TCL_CFG_DEBUG, 1, [Is debugging enabled?])

    if test "$tcl_ok" = "mem" -o "$tcl_ok" = "all"; then
	AC_DEFINE(TCL_MEM_DEBUG, 1, [Is memory debugging enabled?])
    fi

    ifelse($1,bccdebug,dnl Only enable 'compile' for the Tcl core itself
	if test "$tcl_ok" = "compile" -o "$tcl_ok" = "all"; then

/* Define to 1 if you have the ANSI C header files. */
#undef STDC_HEADERS

/* What encoding should be used for embedded configuration info? */
#undef TCL_CFGVAL_ENCODING

/* Is debugging enabled? */
#undef TCL_CFG_DEBUG

/* Is this a 64-bit build? */
#undef TCL_CFG_DO64BIT

/* Is this an optimized build? */
#undef TCL_CFG_OPTIMIZED

#error Wide high-resolution clicks not implemented on this platform
#endif
    }

    return nsec;
}
#endif /* TCL_WIDE_CLICKS */

/*
 *----------------------------------------------------------------------
 *
 * TclpGetTimeZone --
 *
 *	Determines the current timezone. The method varies wildly between
 *	different platform implementations, so its hidden in this function.
 *
 * Results:
 *	The return value is the local time zone, measured in minutes away from
 *	GMT (-ve for east, +ve for west).
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TclpGetTimeZone(
    unsigned long currentTime)
{
    int timeZone;

    /*
     * We prefer first to use the time zone in "struct tm" if the structure
     * contains such a member. Following that, we try to locate the external
     * 'timezone' variable and use its value. If both of those methods fail,
     * we attempt to convert a known time to local time and use the difference
     * from UTC as the local time zone. In all cases, we need to undo any
     * Daylight Saving Time adjustment.
     */

#if defined(HAVE_TM_TZADJ)
#define TCL_GOT_TIMEZONE
    /*
     * Struct tm contains tm_tzadj - that value may be used.
     */

    time_t curTime = (time_t) currentTime;
    struct tm *timeDataPtr = TclpLocaltime(&curTime);

    timeZone = timeDataPtr->tm_tzadj / 60;
    if (timeDataPtr->tm_isdst) {
	timeZone += 60;
    }
#endif

#if defined(HAVE_TM_GMTOFF) && !defined (TCL_GOT_TIMEZONE)
#define TCL_GOT_TIMEZONE
    /*
     * Struct tm contains tm_gmtoff - that value may be used.
     */

    time_t curTime = (time_t) currentTime;
    struct tm *timeDataPtr = TclpLocaltime(&curTime);

    timeZone = -(timeDataPtr->tm_gmtoff / 60);
    if (timeDataPtr->tm_isdst) {
	timeZone += 60;
    }
#endif

#if defined(HAVE_TIMEZONE_VAR) && !defined(TCL_GOT_TIMEZONE) && !defined(USE_DELTA_FOR_TZ)
#define TCL_GOT_TIMEZONE
    /*
     * The 'timezone' external var is present and may be used.
     */

    SetTZIfNecessary();

    /*
     * Note: this is not a typo in "timezone" below! See tzset documentation
     * for details.
     */

    timeZone = timezone / 60;
#endif

#if !defined(TCL_GOT_TIMEZONE)
#define TCL_GOT_TIMEZONE
    /*
     * Fallback - determine time zone with a known reference time.
     */

    time_t tt;
    struct tm *stm;

    tt = 849268800L;		/* 1996-11-29 12:00:00  GMT */
    stm = TclpLocaltime(&tt);	/* eg 1996-11-29  6:00:00  CST6CDT */

    /*
     * The calculation below assumes a max of +12 or -12 hours from GMT.
     */

    timeZone = (12 - stm->tm_hour)*60 + (0 - stm->tm_min);
    if (stm->tm_isdst) {
	timeZone += 60;
    }

    /*
     * Now have offset for our known reference time, eg +360 for CST6CDT.
     */
#endif

#ifndef TCL_GOT_TIMEZONE
    /*
     * Cause fatal compile error, we don't know how to get timezone.
     */

#error autoconf did not figure out how to determine the timezone.
#endif

    return timeZone;
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_GetTime --
 *
 *	Gets the current system time in seconds and microseconds since the

  cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h.  */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h.  */

	    #ifdef __WIN32__
		#error cross-compiler
	    #endif

int
main ()
{

  (exit $ac_status); }; } &&
	 { ac_try='test -s conftest.$ac_objext'
  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  echo "$as_me:$LINENO: \$? = $ac_status" >&5
  (exit $ac_status); }; }; then
  ac_cv_cross=yes
else
  echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5

ac_cv_cross=no
fi
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext

fi
echo "$as_me:$LINENO: result: $ac_cv_cross" >&5
echo "${ECHO_T}$ac_cv_cross" >&6

		cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h.  */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h.  */

		    #ifdef _WIN64
			#error 64-bit
		    #endif

int
main ()
{

  ;

  (exit $ac_status); }; } &&
	 { ac_try='test -s conftest.$ac_objext'
  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  echo "$as_me:$LINENO: \$? = $ac_status" >&5
  (exit $ac_status); }; }; then
  tcl_win_64bit=no
else
  echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5

tcl_win_64bit=yes

fi
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
		if test "$tcl_win_64bit" = "yes" ; then
			do64bit=amd64
			MACHINE="AMD64"
			echo "$as_me:$LINENO: result:    Using 64-bit $MACHINE mode" >&5

  tcl_ok=no
fi;
# FIXME: Currently, LDFLAGS_DEFAULT is not used, it should work like CFLAGS_DEFAULT.
    if test "$tcl_ok" = "no"; then
	CFLAGS_DEFAULT='$(CFLAGS_OPTIMIZE)'
	LDFLAGS_DEFAULT='$(LDFLAGS_OPTIMIZE)'
	DBGX=""





	echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6

	cat >>confdefs.h <<\_ACEOF
#define TCL_CFG_OPTIMIZED 1
_ACEOF

    else
	CFLAGS_DEFAULT='$(CFLAGS_DEBUG)'
	LDFLAGS_DEFAULT='$(LDFLAGS_DEBUG)'
	DBGX=g
	if test "$tcl_ok" = "yes"; then
	    echo "$as_me:$LINENO: result: yes (standard debugging)" >&5
echo "${ECHO_T}yes (standard debugging)" >&6
	fi
    fi


    cat >>confdefs.h <<\_ACEOF
#define TCL_CFG_DEBUG 1
_ACEOF


    if test "$tcl_ok" = "mem" -o "$tcl_ok" = "all"; then

	cat >>confdefs.h <<\_ACEOF
#define TCL_MEM_DEBUG 1
_ACEOF

    fi

    if test "$tcl_ok" = "compile" -o "$tcl_ok" = "all"; then

	cat >>confdefs.h <<\_ACEOF
#define TCL_COMPILE_DEBUG 1
_ACEOF


	cat >>confdefs.h <<\_ACEOF
#define TCL_COMPILE_STATS 1
_ACEOF

    fi

    if test "$tcl_ok" != "yes" -a "$tcl_ok" != "no"; then
	if test "$tcl_ok" = "all"; then

REGVERSION = 13
REGDOTVERSION = 1.3

BINROOT		= ..
!IF "$(NODEBUG)" == "1"
TMPDIRNAME	= Release
DBGX		=
SYMDEFINES	=
!ELSE
TMPDIRNAME	= Debug
#DBGX		= d
DBGX		=
SYMDEFINES	= -DTCL_CFG_DEBUG
!ENDIF
TMPDIR		= $(BINROOT)\$(TMPDIRNAME)

!if $(STATIC_BUILD)
OPTDEFINES	= $(OPTDEFINES) -DSTATIC_BUILD
!endif
!if $(TCL_NO_DEPRECATED)
OPTDEFINES	= $(OPTDEFINES) -DTCL_NO_DEPRECATED
!endif

!if $(DEBUG)
OPTDEFINES	= $(OPTDEFINES) -DTCL_CFG_DEBUG
!elseif $(OPTIMIZING)
OPTDEFINES	= $(OPTDEFINES) -DTCL_CFG_OPTIMIZED

!endif
!if $(PROFILE)
OPTDEFINES	= $(OPTDEFINES) -DTCL_CFG_PROFILED
!endif
!if "$(MACHINE)" == "IA64" || "$(MACHINE)" == "AMD64"
OPTDEFINES	= $(OPTDEFINES) -DTCL_CFG_DO64BIT
!endif




#----------------------------------------------------------
# Locate the Tcl headers to build against
#----------------------------------------------------------

!if "$(PROJECT)" == "tcl"

    AC_ARG_WITH(tcl, [  --with-tcl=DIR          use Tcl 8.6 binaries from DIR],
	    TCL_BIN_DIR=$withval, TCL_BIN_DIR=`cd $TCL_BIN_DIR_DEFAULT; pwd`)
    if test ! -d $TCL_BIN_DIR; then
	AC_MSG_ERROR(Tcl directory $TCL_BIN_DIR does not exist)
    fi
    if test ! -f $TCL_BIN_DIR/tclConfig.sh; then

	AC_MSG_ERROR(There is no tclConfig.sh in $TCL_BIN_DIR:  perhaps you did not specify the Tcl *build* directory (not the toplevel Tcl directory) or you forgot to configure Tcl?)


    fi
    AC_MSG_RESULT($TCL_BIN_DIR/tclConfig.sh)
])

#------------------------------------------------------------------------
# SC_PATH_TKCONFIG --
#

    AC_MSG_CHECKING([for build with symbols])
    AC_ARG_ENABLE(symbols, [  --enable-symbols        build with debugging symbols [--disable-symbols]],    [tcl_ok=$enableval], [tcl_ok=no])
# FIXME: Currently, LDFLAGS_DEFAULT is not used, it should work like CFLAGS_DEFAULT.
    if test "$tcl_ok" = "no"; then
	CFLAGS_DEFAULT='$(CFLAGS_OPTIMIZE)'
	LDFLAGS_DEFAULT='$(LDFLAGS_OPTIMIZE)'
	DBGX=""

	AC_MSG_RESULT([no])

	AC_DEFINE(TCL_CFG_OPTIMIZED)
    else
	CFLAGS_DEFAULT='$(CFLAGS_DEBUG)'
	LDFLAGS_DEFAULT='$(LDFLAGS_DEBUG)'
	DBGX=g
	if test "$tcl_ok" = "yes"; then
	    AC_MSG_RESULT([yes (standard debugging)])
	fi
    fi
    AC_SUBST(CFLAGS_DEFAULT)
    AC_SUBST(LDFLAGS_DEFAULT)
    AC_DEFINE(TCL_CFG_DEBUG)

    if test "$tcl_ok" = "mem" -o "$tcl_ok" = "all"; then
	AC_DEFINE(TCL_MEM_DEBUG)
    fi

    if test "$tcl_ok" = "compile" -o "$tcl_ok" = "all"; then
	AC_DEFINE(TCL_COMPILE_DEBUG)
	AC_DEFINE(TCL_COMPILE_STATS)
    fi

    if test "$tcl_ok" != "yes" -a "$tcl_ok" != "no"; then
	if test "$tcl_ok" = "all"; then
	    AC_MSG_RESULT([enabled symbols mem compile debugging])
	else
	    AC_MSG_RESULT([enabled $tcl_ok debugging])

    MACHINE="X86"

    if test "$GCC" = "yes"; then

      AC_CACHE_CHECK(for cross-compile version of gcc,
	ac_cv_cross,
	AC_TRY_COMPILE([
	    #ifdef __WIN32__
		#error cross-compiler
	    #endif
	], [],
	ac_cv_cross=yes,
	ac_cv_cross=no)
      )

      if test "$ac_cv_cross" = "yes"; then
	case "$do64bit" in
	    amd64|x64|yes)
		CC="x86_64-w64-mingw32-gcc"
		LD="x86_64-w64-mingw32-ld"

		;;
	    ia64)
		MACHINE="IA64"
		AC_MSG_RESULT([   Using 64-bit $MACHINE mode])
		;;
	    *)
		AC_TRY_COMPILE([
		    #ifdef _WIN64
			#error 64-bit
		    #endif
		], [],
			tcl_win_64bit=no,
			tcl_win_64bit=yes
		)
		if test "$tcl_win_64bit" = "yes" ; then
			do64bit=amd64
			MACHINE="AMD64"
			AC_MSG_RESULT([   Using 64-bit $MACHINE mode])
		fi
		;;

/*
 * Static functions defined within this file.
 */

static void *		FindSymbol(Tcl_Interp *interp,
			    Tcl_LoadHandle loadHandle, const char *symbol);
static void		InitDLLDirectoryName(void);
static void		UnloadFile(Tcl_LoadHandle loadHandle);

/*
 *----------------------------------------------------------------------
 *
 * TclpDlopen --
 *

	Tcl_Close(NULL, infoPtr->channel);
	return NULL;
    } else if (TCL_ERROR == Tcl_SetChannelOption(NULL, infoPtr->channel,
	    "-eofchar", "")) {
	Tcl_Close(NULL, infoPtr->channel);
	return NULL;
    }
    return infoPtr->channel
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_MakeTcpClientChannel --
 *

    return retval;

}

/*
 *----------------------------------------------------------------------
 *
 * TclpGetTimeZone --
 *
 *	Determines the current timezone. The method varies wildly between
 *	different Platform implementations, so its hidden in this function.
 *
 * Results:
 *	Minutes west of GMT.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TclpGetTimeZone(
    unsigned long currentTime)
{
    int timeZone;

    tzset();
    timeZone = timezone / 60;

    return timeZone;
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_GetTime --
 *
 *	Gets the current system time in seconds and microseconds since the
 *	beginning of the epoch: 00:00 UCT, January 1, 1970.
 *
 * Results:
 *	Returns the current time in timePtr.

     * paused state so we need to timeout and continue.
     */

    WaitForSingleObject(timeInfo.calibrationThread, 100);
    CloseHandle(timeInfo.exitEvent);
    CloseHandle(timeInfo.calibrationThread);
}

/*
 *----------------------------------------------------------------------
 *
 * TclpGetTZName --
 *
 *	Gets the current timezone string.
 *
 * Results:
 *	Returns a pointer to a static string, or NULL on failure.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

char *
TclpGetTZName(
    int dst)
{
    int len;
    char *zone, *p;
    TIME_ZONE_INFORMATION tz;
    Tcl_Encoding encoding;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
    char *name = tsdPtr->tzName;

    /*
     * tzset() under Borland doesn't seem to set up tzname[] at all.
     * tzset() under MSVC has the following weird observed behavior:
     *	 First time we call "clock format [clock seconds] -format %Z -gmt 1"
     *	 we get "GMT", but on all subsequent calls we get the current time
     *	 ezone string, even though env(TZ) is GMT and the variable _timezone
     *	 is 0.
     */

    name[0] = '\0';

    zone = getenv("TZ");
    if (zone != NULL) {
	/*
	 * TZ is of form "NST-4:30NDT", where "NST" would be the name of the
	 * standard time zone for this area, "-4:30" is the offset from GMT in
	 * hours, and "NDT is the name of the daylight savings time zone in
	 * this area. The offset and DST strings are optional.
	 */

	len = strlen(zone);
	if (len > 3) {
	    len = 3;
	}
	if (dst != 0) {
	    /*
	     * Skip the offset string and get the DST string.
	     */

	    p = zone + len;
	    p += strspn(p, "+-:0123456789");
	    if (*p != '\0') {
		zone = p;
		len = strlen(zone);
		if (len > 3) {
		    len = 3;
		}
	    }
	}
	Tcl_ExternalToUtf(NULL, NULL, zone, len, 0, NULL, name,
		sizeof(tsdPtr->tzName), NULL, NULL, NULL);
    }
    if (name[0] == '\0') {
	if (GetTimeZoneInformation(&tz) == TIME_ZONE_ID_UNKNOWN) {
	    /*
	     * MSDN: On NT this is returned if DST is not used in the current
	     * TZ
	     */

	    dst = 0;
	}
	encoding = Tcl_GetEncoding(NULL, "unicode");
	Tcl_ExternalToUtf(NULL, encoding,
		(char *) ((dst) ? tz.DaylightName : tz.StandardName), -1,
		0, NULL, name, sizeof(tsdPtr->tzName), NULL, NULL, NULL);
	Tcl_FreeEncoding(encoding);
    }
    return name;
}

/*
 *----------------------------------------------------------------------
 *
 * TclpGetDate --
 *
 *	This function converts between seconds and struct tm. If useGMT is