/*
 * tclUnixInit.c --
 *
 *	Contains the Unix-specific interpreter initialization functions.
 *
 * Copyright (c) 1995-1997 Sun Microsystems, Inc.
 * Copyright (c) 1999 by Scriptics Corporation.
 * All rights reserved.
 *
 * RCS: @(#) $Id: tclUnixInit.c,v 1.54.2.1 2005/06/13 01:47:16 msofer Exp $
 */

#include "tclInt.h"
#include <stddef.h>
#include <locale.h>
#ifdef HAVE_LANGINFO
#include <langinfo.h>
#endif
#include <sys/resource.h>
#if defined(__FreeBSD__)
#   include <floatingpoint.h>
#endif
#if defined(__bsdi__)
#   include <sys/param.h>
#   if _BSDI_VERSION > 199501
#	include <dlfcn.h>
#   endif
#endif
#ifdef HAVE_COREFOUNDATION
#include <CoreFoundation/CoreFoundation.h>
#endif

/*
 * Define this if you want to revert to the old behavior of
 * never checking the stack.
 */

 * encoding to Tcl encoding name.
 */

typedef struct LocaleTable {
    CONST char *lang;
    CONST char *encoding;
} LocaleTable;

/* 
 * The table below is sorted for the sake of doing binary searches on it.
 * The indenting reflects different categories of data.  The leftmost
 * data represent the encoding names directly implemented by data files
 * in Tcl's default encoding directory.  Indented by one TAB are the
 * encoding names that are common alternative spellings.  Indented by
 * two TABs are the accumulated "bug fixes" that have been added to
 * deal with the wide variability seen among existing platforms.
 */

static CONST LocaleTable localeTable[] = {

	    {"",		"iso8859-1"},
	    {"ansi_x3.4-1968",	"iso8859-1"},
    {"ascii",		"ascii"},
    {"big5",		"big5"},
    {"cp1250",		"cp1250"},
    {"cp1251",		"cp1251"},
    {"cp1252",		"cp1252"},
    {"cp1253",		"cp1253"},
    {"cp1254",		"cp1254"},

    {"cp949",		"cp949"},
    {"cp950",		"cp950"},
    {"dingbats",	"dingbats"},
    {"ebcdic",		"ebcdic"},
    {"euc-cn",		"euc-cn"},
    {"euc-jp",		"euc-jp"},
    {"euc-kr",		"euc-kr"},
		    {"eucjp",		"euc-jp"},
		    {"euckr",		"euc-kr"},
		    {"euctw",		"euc-cn"},
    {"gb12345",		"gb12345"},
    {"gb1988",		"gb1988"},
    {"gb2312",		"gb2312"},
		    {"gb2312-1980",	"gb2312"},
    {"gb2312-raw",	"gb2312-raw"},
		    {"greek8",		"cp869"},
	    {"ibm1250",		"cp1250"},
	    {"ibm1251",		"cp1251"},
	    {"ibm1252",		"cp1252"},
	    {"ibm1253",		"cp1253"},
	    {"ibm1254",		"cp1254"},
	    {"ibm1255",		"cp1255"},
	    {"ibm1256",		"cp1256"},
	    {"ibm1257",		"cp1257"},
	    {"ibm1258",		"cp1258"},
	    {"ibm437",		"cp437"},
	    {"ibm737",		"cp737"},
	    {"ibm775",		"cp775"},
	    {"ibm850",		"cp850"},
	    {"ibm852",		"cp852"},
	    {"ibm855",		"cp855"},
	    {"ibm857",		"cp857"},
	    {"ibm860",		"cp860"},
	    {"ibm861",		"cp861"},
	    {"ibm862",		"cp862"},
	    {"ibm863",		"cp863"},
	    {"ibm864",		"cp864"},
	    {"ibm865",		"cp865"},
	    {"ibm866",		"cp866"},
	    {"ibm869",		"cp869"},
	    {"ibm874",		"cp874"},
	    {"ibm932",		"cp932"},
	    {"ibm936",		"cp936"},
	    {"ibm949",		"cp949"},
	    {"ibm950",		"cp950"},
	    {"iso-2022",	"iso2022"},
	    {"iso-2022-jp",	"iso2022-jp"},
	    {"iso-2022-kr",	"iso2022-kr"},
	    {"iso-8859-1",	"iso8859-1"},
	    {"iso-8859-10",	"iso8859-10"},
	    {"iso-8859-13",	"iso8859-13"},
	    {"iso-8859-14",	"iso8859-14"},
	    {"iso-8859-15",	"iso8859-15"},
	    {"iso-8859-16",	"iso8859-16"},
	    {"iso-8859-2",	"iso8859-2"},
	    {"iso-8859-3",	"iso8859-3"},
	    {"iso-8859-4",	"iso8859-4"},
	    {"iso-8859-5",	"iso8859-5"},
	    {"iso-8859-6",	"iso8859-6"},
	    {"iso-8859-7",	"iso8859-7"},
	    {"iso-8859-8",	"iso8859-8"},
	    {"iso-8859-9",	"iso8859-9"},
    {"iso2022",		"iso2022"},
    {"iso2022-jp",	"iso2022-jp"},
    {"iso2022-kr",	"iso2022-kr"},
    {"iso8859-1",	"iso8859-1"},
    {"iso8859-10",	"iso8859-10"},
    {"iso8859-13",	"iso8859-13"},
    {"iso8859-14",	"iso8859-14"},
    {"iso8859-15",	"iso8859-15"},
    {"iso8859-16",	"iso8859-16"},
    {"iso8859-2",	"iso8859-2"},
    {"iso8859-3",	"iso8859-3"},
    {"iso8859-4",	"iso8859-4"},
    {"iso8859-5",	"iso8859-5"},
    {"iso8859-6",	"iso8859-6"},
    {"iso8859-7",	"iso8859-7"},
    {"iso8859-8",	"iso8859-8"},
    {"iso8859-9",	"iso8859-9"},
		    {"iso88591",	"iso8859-1"},
		    {"iso885915",	"iso8859-15"},
		    {"iso88592",	"iso8859-2"},
		    {"iso88595",	"iso8859-5"},
		    {"iso88596",	"iso8859-6"},
		    {"iso88597",	"iso8859-7"},
		    {"iso88598",	"iso8859-8"},
		    {"iso88599",	"iso8859-9"},
#ifdef hpux
		    {"ja",		"shiftjis"},
#else
		    {"ja",		"euc-jp"},
#endif
		    {"ja_jp",		"euc-jp"},
		    {"ja_jp.euc",	"euc-jp"},
		    {"ja_jp.eucjp",     "euc-jp"},
		    {"ja_jp.jis",	"iso2022-jp"},
		    {"ja_jp.mscode",	"shiftjis"},
		    {"ja_jp.sjis",	"shiftjis"},
		    {"ja_jp.ujis",	"euc-jp"},
		    {"japan",		"euc-jp"},
#ifdef hpux
		    {"japanese",	"shiftjis"},
#else
		    {"japanese",	"euc-jp"},
#endif
		    {"japanese-sjis",	"shiftjis"},
		    {"japanese-ujis",	"euc-jp"},
		    {"japanese.euc",	"euc-jp"},
		    {"japanese.sjis",	"shiftjis"},
    {"jis0201",		"jis0201"},
    {"jis0208",		"jis0208"},
    {"jis0212",		"jis0212"},
		    {"jp_jp",		"shiftjis"},
		    {"ko",              "euc-kr"},
		    {"ko_kr",           "euc-kr"},
		    {"ko_kr.euc",       "euc-kr"},
		    {"ko_kw.euckw",     "euc-kr"},
    {"koi8-r",		"koi8-r"},
    {"koi8-u",		"koi8-u"},
		    {"korean",          "euc-kr"},
    {"ksc5601",		"ksc5601"},
















    {"maccenteuro",	"macCentEuro"},
    {"maccroatian",	"macCroatian"},
    {"maccyrillic",	"macCyrillic"},
    {"macdingbats",	"macDingbats"},
    {"macgreek",	"macGreek"},
    {"maciceland",	"macIceland"},
    {"macjapan",	"macJapan"},
    {"macroman",	"macRoman"},
    {"macromania",	"macRomania"},
    {"macthai",		"macThai"},
    {"macturkish",	"macTurkish"},
    {"macukraine",	"macUkraine"},



		    {"roman8",		"iso8859-1"},








		    {"ru",		"iso8859-5"},
		    {"ru_ru",		"iso8859-5"},
































		    {"ru_su",		"iso8859-5"},



    {"shiftjis",	"shiftjis"},

		    {"sjis",		"shiftjis"},
    {"symbol",		"symbol"},
    {"tis-620",		"tis-620"},
		    {"tis620",		"tis-620"},
		    {"turkish8",	"cp857"},












		    {"utf8",		"utf-8"},




































		    {"zh",		"cp936"},
		    {"zh_cn.gb2312",	"euc-cn"},
		    {"zh_cn.gbk",	"euc-cn"},
		    {"zh_cz.gb2312",	"euc-cn"},

		    {"zh_tw",		"euc-tw"},
		    {"zh_tw.big5",	"big5"},

};

#ifndef TCL_NO_STACK_CHECK
static int		GetStackSize _ANSI_ARGS_((size_t *stackSizePtr));
#endif /* TCL_NO_STACK_CHECK */
#ifdef HAVE_COREFOUNDATION
static int		MacOSXGetLibraryPath _ANSI_ARGS_((
			    Tcl_Interp *interp, int maxPathLen,
			    char *tclLibPath));
#endif /* HAVE_COREFOUNDATION */


/*
 *---------------------------------------------------------------------------
 *
 * TclpInitPlatform --
 *

    /*
     * Finally, look for the library relative to the compiled-in path.
     * This is needed when users install Tcl with an exec-prefix that
     * is different from the prtefix.
     */

    {
#ifdef HAVE_COREFOUNDATION
    char tclLibPath[MAXPATHLEN + 1];

    if (MacOSXGetLibraryPath(NULL, MAXPATHLEN, tclLibPath) == TCL_OK) {
        str = tclLibPath;
    } else
#endif /* HAVE_COREFOUNDATION */
    {
	/* TODO: Pull this value from the TIP 59 table */
        str = defaultLibraryDir;
    }
    if (str[0] != '\0') {
        objPtr = Tcl_NewStringObj(str, -1);
        Tcl_ListObjAppendElement(NULL, pathPtr, objPtr);

}

void
TclpSetInterfaces()
{
	/* do nothing */
}

static CONST char *
SearchKnownEncodings(encoding)
    CONST char *encoding;
{
    int left = 0;
    int right = sizeof(localeTable)/sizeof(LocaleTable);
    while (left <= right) {
	int test = (left + right)/2;
	int code = strcmp(localeTable[test].lang, encoding);
	if (code == 0) {
	    return localeTable[test].encoding;
	}
	if (code < 0) {
	    left = test+1;
	} else {
	    right = test-1;
	}
    }
    return NULL;
}

CONST char *
TclpGetEncodingNameFromEnvironment(bufPtr)
    Tcl_DString *bufPtr;
{
    CONST char *encoding;
    CONST char *knownEncoding;

    Tcl_DStringInit(bufPtr);

    /*
     * Determine the current encoding from the LC_* or LANG environment
     * variables.  We previously used setlocale() to determine the locale,
     * but this does not work on some systems (e.g. Linux/i386 RH 5.0).
     */
#ifdef HAVE_LANGINFO
    if (setlocale(LC_CTYPE, "") != NULL) {
	Tcl_DString ds;

	/* Use a DString so we can modify case. */
	Tcl_DStringInit(&ds);
	encoding = Tcl_DStringAppend(&ds, nl_langinfo(CODESET), -1);
	Tcl_UtfToLower(Tcl_DStringValue(&ds));

	knownEncoding = SearchKnownEncodings(encoding);

	if (knownEncoding != NULL) {

	    Tcl_DStringAppend(bufPtr, knownEncoding, -1);



	} else if (NULL != Tcl_GetEncoding(NULL, encoding)) {
	    Tcl_DStringAppend(bufPtr, encoding, -1);
	}
	Tcl_DStringFree(&ds);
	if (Tcl_DStringLength(bufPtr)) {
	    return Tcl_DStringValue(bufPtr);
	}
    }

    }
    if (encoding == NULL || encoding[0] == '\0') {
	encoding = NULL;
    }

    if (encoding != NULL) {
	CONST char *p;
	Tcl_DString ds;

	Tcl_DStringInit(&ds);
	p = encoding;
	encoding = Tcl_DStringAppend(&ds, p, -1);
	Tcl_UtfToLower(Tcl_DStringValue(&ds));

	knownEncoding = SearchKnownEncodings(encoding);
	if (knownEncoding != NULL) {

	    Tcl_DStringAppend(bufPtr, knownEncoding, -1);



	} else if (NULL != Tcl_GetEncoding(NULL, encoding)) {
	    Tcl_DStringAppend(bufPtr, encoding, -1);
	}
	if (Tcl_DStringLength(bufPtr)) {
	    Tcl_DStringFree(&ds);
	    return Tcl_DStringValue(bufPtr);
	}

	/*
	 * We didn't recognize the full value as an encoding name.
	 * If there is an encoding subfield, we can try to guess from that.
	 */

	for (p = encoding; *p != '\0'; p++) {
	    if (*p == '.') {
		p++;
		break;
	    }
	}
	if (*p != '\0') {
	    knownEncoding = SearchKnownEncodings(p);

	    if (knownEncoding != NULL) {

		Tcl_DStringAppend(bufPtr, knownEncoding, -1);

	    } else if (NULL != Tcl_GetEncoding(NULL, p)) {



		Tcl_DStringAppend(bufPtr, p, -1);

	    }
	}



	Tcl_DStringFree(&ds);
	if (Tcl_DStringLength(bufPtr)) {
	    return Tcl_DStringValue(bufPtr);


	}
    }
    return Tcl_DStringAppend(bufPtr, TCL_DEFAULT_ENCODING, -1);
}

/*
 *---------------------------------------------------------------------------

#ifndef NO_UNAME
    struct utsname name;
#endif
    int unameOK;
    CONST char *user;
    Tcl_DString ds;

#ifdef HAVE_COREFOUNDATION
    char tclLibPath[MAXPATHLEN + 1];

    if (MacOSXGetLibraryPath(interp, MAXPATHLEN, tclLibPath) == TCL_OK) {
        CONST char *str;
        Tcl_DString ds;
        CFBundleRef bundleRef;

            Tcl_DStringFree(&ds);
        }
        if ((bundleRef = CFBundleGetMainBundle())) {
            CFURLRef frameworksURL;
            Tcl_StatBuf statBuf;
            if((frameworksURL = CFBundleCopyPrivateFrameworksURL(bundleRef))) {
                if(CFURLGetFileSystemRepresentation(frameworksURL, TRUE,
                            (unsigned char*) tclLibPath, MAXPATHLEN) &&
                        ! TclOSstat(tclLibPath, &statBuf) &&
                        S_ISDIR(statBuf.st_mode)) {
                    Tcl_SetVar(interp, "tcl_pkgPath", tclLibPath,
                            TCL_GLOBAL_ONLY | TCL_APPEND_VALUE);
                    Tcl_SetVar(interp, "tcl_pkgPath", " ",
                            TCL_GLOBAL_ONLY | TCL_APPEND_VALUE);
                }
                CFRelease(frameworksURL);
            }
            if((frameworksURL = CFBundleCopySharedFrameworksURL(bundleRef))) {
                if(CFURLGetFileSystemRepresentation(frameworksURL, TRUE,
                            (unsigned char*) tclLibPath, MAXPATHLEN) &&
                        ! TclOSstat(tclLibPath, &statBuf) &&
                        S_ISDIR(statBuf.st_mode)) {
                    Tcl_SetVar(interp, "tcl_pkgPath", tclLibPath,
                            TCL_GLOBAL_ONLY | TCL_APPEND_VALUE);
                    Tcl_SetVar(interp, "tcl_pkgPath", " ",
                            TCL_GLOBAL_ONLY | TCL_APPEND_VALUE);
                }
                CFRelease(frameworksURL);
            }
        }
        Tcl_SetVar(interp, "tcl_pkgPath", pkgPath,
                TCL_GLOBAL_ONLY | TCL_APPEND_VALUE);
    } else
#endif /* HAVE_COREFOUNDATION */
    {
        Tcl_SetVar(interp, "tcl_pkgPath", pkgPath, TCL_GLOBAL_ONLY);
    }

#ifdef DJGPP
    Tcl_SetVar2(interp, "tcl_platform", "platform", "dos", TCL_GLOBAL_ONLY);
#else

 *
 * Side effects:
 *	Same as for Tcl_MacOSXOpenVersionedBundleResources.
 *
 *----------------------------------------------------------------------
 */

#ifdef HAVE_COREFOUNDATION
static int
MacOSXGetLibraryPath(Tcl_Interp *interp, int maxPathLen, char *tclLibPath)
{
    int foundInFramework = TCL_ERROR;
#ifdef TCL_FRAMEWORK
    foundInFramework = Tcl_MacOSXOpenVersionedBundleResources(interp, 
	"com.tcltk.tcllibrary", TCL_FRAMEWORK_VERSION, 0, maxPathLen, tclLibPath);
#endif
    return foundInFramework;
}
#endif /* HAVE_COREFOUNDATION */