tclwininit.c

这是leon3处理器的交叉编译链

AppendDllPath(
    Tcl_Obj *pathPtr, 
    HMODULE hModule,
    CONST char *lib)
{
    WCHAR wName[MAX_PATH + LIBRARY_SIZE];
    char name[(MAX_PATH + LIBRARY_SIZE) * TCL_UTF_MAX];

    if (GetModuleFileNameW(hModule, wName, MAX_PATH) == 0) {
	GetModuleFileNameA(hModule, name, MAX_PATH);
    } else {
	ToUtf(wName, name);
    }
    if (lib != NULL) {
	char *end, *p;

	end = strrchr(name, '\\');
	*end = '\0';
	p = strrchr(name, '\\');
	if (p != NULL) {
	    end = p;
	}
	*end = '\\';
	strcpy(end + 1, lib);
    }
    TclWinNoBackslash(name);
    Tcl_ListObjAppendElement(NULL, pathPtr, Tcl_NewStringObj(name, -1));
}

/*
 *---------------------------------------------------------------------------
 *
 * ToUtf --
 *
 *	Convert a char string to a UTF string.  
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

static int
ToUtf(
    CONST WCHAR *wSrc,
    char *dst)
{
    char *start;

    start = dst;
    while (*wSrc != '\0') {
	dst += Tcl_UniCharToUtf(*wSrc, dst);
	wSrc++;
    }
    *dst = '\0';
    return (int) (dst - start);
}


/*
 *---------------------------------------------------------------------------
 *
 * TclpSetInitialEncodings --
 *
 *	Based on the locale, determine the encoding of the operating
 *	system and the default encoding for newly opened files.
 *
 *	Called at process initialization time, and part way through
 *	startup, we verify that the initial encodings were correctly
 *	setup.  Depending on Tcl's environment, there may not have been
 *	enough information first time through (above).
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The Tcl library path is converted from native encoding to UTF-8,
 *	on the first call, and the encodings may be changed on first or
 *	second call.
 *
 *---------------------------------------------------------------------------
 */

void
TclpSetInitialEncodings()
{
    CONST char *encoding;
    char buf[4 + TCL_INTEGER_SPACE];

    if (libraryPathEncodingFixed == 0) {
	int platformId;
	platformId = TclWinGetPlatformId();
	TclWinSetInterfaces(platformId == VER_PLATFORM_WIN32_NT);
	
	wsprintfA(buf, "cp%d", GetACP());
	Tcl_SetSystemEncoding(NULL, buf);

	if (platformId != VER_PLATFORM_WIN32_NT) {
	    Tcl_Obj *pathPtr = TclGetLibraryPath();
	    if (pathPtr != NULL) {
		int i, objc;
		Tcl_Obj **objv;
		
		objc = 0;
		Tcl_ListObjGetElements(NULL, pathPtr, &objc, &objv);
		for (i = 0; i < objc; i++) {
		    int length;
		    char *string;
		    Tcl_DString ds;

		    string = Tcl_GetStringFromObj(objv[i], &length);
		    Tcl_ExternalToUtfDString(NULL, string, length, &ds);
		    Tcl_SetStringObj(objv[i], Tcl_DStringValue(&ds), 
			    Tcl_DStringLength(&ds));
		    Tcl_DStringFree(&ds);
		}
	    }
	}
	
	libraryPathEncodingFixed = 1;
    } else {
	wsprintfA(buf, "cp%d", GetACP());
	Tcl_SetSystemEncoding(NULL, buf);
    }

    /* This is only ever called from the startup thread */
    if (binaryEncoding == NULL) {
	/*
	 * Keep this encoding preloaded.  The IO package uses it for
	 * gets on a binary channel.
	 */
	encoding = "iso8859-1";
	binaryEncoding = Tcl_GetEncoding(NULL, encoding);
    }
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpSetVariables --
 *
 *	Performs platform-specific interpreter initialization related to
 *	the tcl_platform and env variables, and other platform-specific
 *	things.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Sets "tcl_platform", and "env(HOME)" Tcl variables.
 *
 *----------------------------------------------------------------------
 */

void
TclpSetVariables(interp)
    Tcl_Interp *interp;		/* Interp to initialize. */	
{	    
    CONST char *ptr;
    char buffer[TCL_INTEGER_SPACE * 2];
    SYSTEM_INFO sysInfo;
    OemId *oemId;
    OSVERSIONINFOA osInfo;
    Tcl_DString ds;

    osInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFOA);
    GetVersionExA(&osInfo);

    oemId = (OemId *) &sysInfo;
    GetSystemInfo(&sysInfo);

    /*
     * Define the tcl_platform array.
     */

    Tcl_SetVar2(interp, "tcl_platform", "platform", "windows",
	    TCL_GLOBAL_ONLY);
    if (osInfo.dwPlatformId < NUMPLATFORMS) {
	Tcl_SetVar2(interp, "tcl_platform", "os",
		platforms[osInfo.dwPlatformId], TCL_GLOBAL_ONLY);
    }
    wsprintfA(buffer, "%d.%d", osInfo.dwMajorVersion, osInfo.dwMinorVersion);
    Tcl_SetVar2(interp, "tcl_platform", "osVersion", buffer, TCL_GLOBAL_ONLY);
    if (oemId->wProcessorArchitecture < NUMPROCESSORS) {
	Tcl_SetVar2(interp, "tcl_platform", "machine",
		processors[oemId->wProcessorArchitecture],
		TCL_GLOBAL_ONLY);
    }

#ifdef _DEBUG
    /*
     * The existence of the "debug" element of the tcl_platform array indicates
     * that this particular Tcl shell has been compiled with debug information.
     * Using "info exists tcl_platform(debug)" a Tcl script can direct the 
     * interpreter to load debug versions of DLLs with the load command.
     */

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

    /*
     * Set up the HOME environment variable from the HOMEDRIVE & HOMEPATH
     * environment variables, if necessary.
     */

    Tcl_DStringInit(&ds);
    ptr = Tcl_GetVar2(interp, "env", "HOME", TCL_GLOBAL_ONLY);
    if (ptr == NULL) {
	ptr = Tcl_GetVar2(interp, "env", "HOMEDRIVE", TCL_GLOBAL_ONLY);
	if (ptr != NULL) {
	    Tcl_DStringAppend(&ds, ptr, -1);
	}
	ptr = Tcl_GetVar2(interp, "env", "HOMEPATH", TCL_GLOBAL_ONLY);
	if (ptr != NULL) {
	    Tcl_DStringAppend(&ds, ptr, -1);
	}
	if (Tcl_DStringLength(&ds) > 0) {
	    Tcl_SetVar2(interp, "env", "HOME", Tcl_DStringValue(&ds),
		    TCL_GLOBAL_ONLY);
	} else {
	    Tcl_SetVar2(interp, "env", "HOME", "c:\\", TCL_GLOBAL_ONLY);
	}
    }

    /*
     * Initialize the user name from the environment first, since this is much
     * faster than asking the system.
     */

    Tcl_DStringSetLength(&ds, 100);
    if (TclGetEnv("USERNAME", &ds) == NULL) {
	if (GetUserName(Tcl_DStringValue(&ds), (LPDWORD) &Tcl_DStringLength(&ds)) == 0) {
	    Tcl_DStringSetLength(&ds, 0);
	}
    }
    Tcl_SetVar2(interp, "tcl_platform", "user", Tcl_DStringValue(&ds),
	    TCL_GLOBAL_ONLY);
    Tcl_DStringFree(&ds);
}

/*
 *----------------------------------------------------------------------
 *
 * TclpFindVariable --
 *
 *	Locate the entry in environ for a given name.  On Unix this 
 *	routine is case sensetive, on Windows this matches mioxed case.
 *
 * Results:
 *	The return value is the index in environ of an entry with the
 *	name "name", or -1 if there is no such entry.   The integer at
 *	*lengthPtr is filled in with the length of name (if a matching
 *	entry is found) or the length of the environ array (if no matching
 *	entry is found).
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TclpFindVariable(name, lengthPtr)
    CONST char *name;		/* Name of desired environment variable
				 * (UTF-8). */
    int *lengthPtr;		/* Used to return length of name (for
				 * successful searches) or number of non-NULL
				 * entries in environ (for unsuccessful
				 * searches). */
{
    int i, length, result = -1;
    register CONST char *env, *p1, *p2;
    char *envUpper, *nameUpper;
    Tcl_DString envString;

    /*
     * Convert the name to all upper case for the case insensitive
     * comparison.
     */

    length = strlen(name);
    nameUpper = (char *) ckalloc((unsigned) length+1);
    memcpy((VOID *) nameUpper, (VOID *) name, (size_t) length+1);
    Tcl_UtfToUpper(nameUpper);
    
    Tcl_DStringInit(&envString);
    for (i = 0, env = environ[i]; env != NULL; i++, env = environ[i]) {
	/*
	 * Chop the env string off after the equal sign, then Convert
	 * the name to all upper case, so we do not have to convert
	 * all the characters after the equal sign.
	 */
	
	envUpper = Tcl_ExternalToUtfDString(NULL, env, -1, &envString);
	p1 = strchr(envUpper, '=');
	if (p1 == NULL) {
	    continue;
	}
	length = (int) (p1 - envUpper);
	Tcl_DStringSetLength(&envString, length+1);
	Tcl_UtfToUpper(envUpper);

	p1 = envUpper;
	p2 = nameUpper;
	for (; *p2 == *p1; p1++, p2++) {
	    /* NULL loop body. */
	}
	if ((*p1 == '=') && (*p2 == '\0')) {
	    *lengthPtr = length;
	    result = i;
	    goto done;
	}
	
	Tcl_DStringFree(&envString);
    }
    
    *lengthPtr = i;

    done:
    Tcl_DStringFree(&envString);
    ckfree(nameUpper);
    return result;
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_Init --
 *
 *	This procedure is typically invoked by Tcl_AppInit procedures
 *	to perform additional initialization for a Tcl interpreter,
 *	such as sourcing the "init.tcl" script.
 *
 * Results:
 *	Returns a standard Tcl completion code and sets the interp's
 *	result if there is an error.
 *
 * Side effects:
 *	Depends on what's in the init.tcl script.
 *
 *----------------------------------------------------------------------
 */

int
Tcl_Init(interp)
    Tcl_Interp *interp;		/* Interpreter to initialize. */
{
    Tcl_Obj *pathPtr;

    if (tclPreInitScript != NULL) {
	if (Tcl_Eval(interp, tclPreInitScript) == TCL_ERROR) {
	    return (TCL_ERROR);
	};
    }

    pathPtr = TclGetLibraryPath();
    if (pathPtr == NULL) {
	pathPtr = Tcl_NewObj();
    }
    Tcl_SetVar2Ex(interp, "tcl_libPath", NULL, pathPtr, TCL_GLOBAL_ONLY);
    return Tcl_Eval(interp, initScript);
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_SourceRCFile --
 *
 *	This procedure is typically invoked by Tcl_Main of Tk_Main
 *	procedure to source an application specific rc file into the
 *	interpreter at startup time.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Depends on what's in the rc script.
 *
 *----------------------------------------------------------------------
 */

void
Tcl_SourceRCFile(interp)
    Tcl_Interp *interp;		/* Interpreter to source rc file into. */
{
    Tcl_DString temp;
    CONST char *fileName;
    Tcl_Channel errChannel;

    fileName = Tcl_GetVar(interp, "tcl_rcFileName", TCL_GLOBAL_ONLY);

    if (fileName != NULL) {
        Tcl_Channel c;
	CONST char *fullName;

        Tcl_DStringInit(&temp);
	fullName = Tcl_TranslateFileName(interp, fileName, &temp);
	if (fullName == NULL) {
	    /*
	     * Couldn't translate the file name (e.g. it referred to a
	     * bogus user or there was no HOME environment variable).
	     * Just do nothing.
	     */
	} else {

	    /*
	     * Test for the existence of the rc file before trying to read it.
	     */

            c = Tcl_OpenFileChannel(NULL, fullName, "r", 0);
            if (c != (Tcl_Channel) NULL) {
                Tcl_Close(NULL, c);
		if (Tcl_EvalFile(interp, fullName) != TCL_OK) {
		    errChannel = Tcl_GetStdChannel(TCL_STDERR);
		    if (errChannel) {
			Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp));
			Tcl_WriteChars(errChannel, "\n", 1);
		    }
		}
	    }
	}
        Tcl_DStringFree(&temp);
    }
}