/* $Xorg: xkbmisc.c,v 1.4 2000/08/17 19:46:44 cpqbld Exp $ */
/************************************************************
 Copyright (c) 1995 by Silicon Graphics Computer Systems, Inc.

 Permission to use, copy, modify, and distribute this
 software and its documentation for any purpose and without
 fee is hereby granted, provided that the above copyright
 notice appear in all copies and that both that copyright
 notice and this permission notice appear in supporting
 documentation, and that the name of Silicon Graphics not be 
 used in advertising or publicity pertaining to distribution 
 of the software without specific prior written permission.
 Silicon Graphics makes no representation about the suitability 
 of this software for any purpose. It is provided "as is"
 without any express or implied warranty.
 
 SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS 
 SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 
 AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
 GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL 
 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 
 DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 
 OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
 THE USE OR PERFORMANCE OF THIS SOFTWARE.

 ********************************************************/
/* $XFree86: xc/lib/xkbfile/xkbmisc.c,v 1.3 2001/07/29 05:01:13 tsi Exp $ */

#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>

#define	XK_CYRILLIC

#include <X11/Xos.h>
#include <X11/Xfuncs.h>

#ifndef XKB_IN_SERVER

#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/XKBlib.h>
#include <X11/extensions/XKBgeom.h>
#include "XKMformat.h"
#include "XKBfileInt.h"

#else

#include "X.h"
#define	NEED_EVENTS
#include <X11/keysym.h>
#include "Xproto.h"
#include "misc.h"
#include "inputstr.h"
#include "dix.h"
#include "XKBstr.h"
#define XKBSRV_NEED_FILE_FUNCS	1
#include "XKBsrv.h"
#include <X11/extensions/XKBgeom.h>

#endif

unsigned
#if NeedFunctionPrototypes
_XkbKSCheckCase(KeySym ks)
#else
_XkbKSCheckCase(ks)
    KeySym	ks;
#endif
{
unsigned	set,rtrn;
unsigned char	ch;

    set= (ks & (~0xff));
    ch= (char)(ks&0xff);
    rtrn= 0;
    switch (set) {
	case 0:		/* latin 1 */
	    if (((ch>=XK_A)&&(ch<=XK_Z))||
		((ch>=XK_Agrave)&&(ch<=XK_THORN)&&(ch!=XK_multiply))) {
		rtrn|= _XkbKSUpper;
	    }
	    if (((ch>=XK_a)&&(ch<=XK_z))||
		((ch>=XK_agrave)&&(ch<=XK_ydiaeresis))) {
		rtrn|= _XkbKSLower;
	    }
	    break;
    }
    return rtrn;
}

/***===================================================================***/

int
#if NeedFunctionPrototypes
_XkbStrCaseCmp(char *str1,char *str2)
#else
_XkbStrCaseCmp(str1,str2)
    char *	str1;
    char *	str2;
#endif
{
    char buf1[512],buf2[512];
    char c, *s;
    register int n;

    for (n=0, s = buf1; (c = *str1++); n++) {
        if (isupper(c))
            c = tolower(c);
        if (n>510)
            break;
        *s++ = c;
    }
    *s = '\0';
    for (n=0, s = buf2; (c = *str2++); n++) {
        if (isupper(c))
            c = tolower(c);
        if (n>510)
            break;
        *s++ = c;
    }
    *s = '\0';
    return (strcmp(buf1, buf2));
}

/***===================================================================***/

Bool
#if NeedFunctionPrototypes
XkbLookupGroupAndLevel(	XkbDescPtr 	xkb,
			int 		key,
			int *		mods_inout,
			int *		grp_inout,
			int *		lvl_rtrn)
#else
XkbLookupGroupAndLevel(xkb,key,mods_inout,grp_inout,lvl_rtrn)
    XkbDescPtr	xkb;
    int		key;
    int	*	mods_inout;
    int *	grp_inout;
    int	*	lvl_rtrn;
#endif
{
int		nG,eG;

    if ((!xkb)||(!XkbKeycodeInRange(xkb,key))||(!grp_inout))
	return False;

    nG= XkbKeyNumGroups(xkb,key);
    eG= *grp_inout;

    if ( nG==0 ) {
	*grp_inout= 0;
	if (lvl_rtrn!=NULL)
	    *lvl_rtrn= 0;
	return False;
    }
    else if ( nG==1 ) {
	eG= 0;
    }
    else if ( eG>=nG ) {
	unsigned gI= XkbKeyGroupInfo(xkb,key);
	switch (XkbOutOfRangeGroupAction(gI)) {
	    default:
		eG %= nG;
		break;
	    case XkbClampIntoRange:
		eG = nG-1;
		break;
	    case XkbRedirectIntoRange:
		eG = XkbOutOfRangeGroupNumber(gI);
		if (eG>=nG)
		    eG= 0;
		break;
	}
    }
    *grp_inout= eG;
    if (mods_inout!=NULL) {
	XkbKeyTypePtr	type;
	int		preserve;

	type = XkbKeyKeyType(xkb,key,eG);
	if (lvl_rtrn!=NULL)
	    *lvl_rtrn= 0;
	preserve= 0;
	if (type->map) { /* find the shift level */
	    register int i;
	    register XkbKTMapEntryPtr entry;
	    for (i=0,entry=type->map;i<type->map_count;i++,entry++) {
		if ((entry->active)&&
			(((*mods_inout)&type->mods.mask)==entry->mods.mask)){
		    if (lvl_rtrn!=NULL)
			*lvl_rtrn= entry->level;
		    if (type->preserve)
			preserve= type->preserve[i].mask;
		    break;
		}
	    }
	}
	(*mods_inout)&= ~(type->mods.mask&(~preserve));
    }
    return True;
}

/***===================================================================***/

static Bool
#if NeedFunctionPrototypes
XkbWriteSectionFromName(FILE *file,char *sectionName,char *name)
#else
XkbWriteSectionFromName(file,sectionName,name)
    FILE *			file;
    char *			sectionName;
    char *			name;
#endif
{
    fprintf(file,"    xkb_%-20s { include \"%s\" };\n",sectionName,name);
    return True;
}

#define	NEED_DESC(n) ((!n)||((n)[0]=='+')||((n)[0]=='|')||(strchr((n),'%')))
#define	COMPLETE(n)  ((n)&&(!NEED_DESC(n)))

/* ARGSUSED */
static void
#if NeedFunctionPrototypes
_AddIncl(	FILE *		file,
		XkbFileInfo *	result,
		Bool 		topLevel,
		Bool 		showImplicit,
		int 		index,
		void *		priv)
#else
_AddIncl(file,result,topLevel,showImplicit,index,priv)
    FILE *		file;
    XkbFileInfo *	result;
    Bool		topLevel;
    Bool		showImplicit;
    int			index;
    void *		priv;
#endif
{
    if ((priv)&&(strcmp(priv,"%")!=0))
	fprintf(file,"    include \"%s\"\n",(char *)priv);
    return;
}

Bool
#if NeedFunctionPrototypes
XkbWriteXKBKeymapForNames(	FILE *			file,
				XkbComponentNamesPtr	names,
				Display *		dpy,
				XkbDescPtr		xkb,
				unsigned		want,
				unsigned		need)
#else
XkbWriteXKBKeymapForNames(file,names,dpy,xkb,want,need)
    FILE *			file;
    XkbComponentNamesPtr	names;
    Display *			dpy;
    XkbDescPtr			xkb;
    unsigned			want;
    unsigned			need;
#endif
{
char *		name,*tmp;
unsigned	complete;
XkbNamesPtr	old_names;
int		multi_section;
unsigned	wantNames,wantConfig,wantDflts;
XkbFileInfo	finfo;

    bzero(&finfo,sizeof(XkbFileInfo));

    complete= 0;
    if ((name=names->keymap)==NULL)	name= "default";
    if (COMPLETE(names->keycodes))	complete|= XkmKeyNamesMask;
    if (COMPLETE(names->types))		complete|= XkmTypesMask;
    if (COMPLETE(names->compat))	complete|= XkmCompatMapMask;
    if (COMPLETE(names->symbols))	complete|= XkmSymbolsMask;
    if (COMPLETE(names->geometry))	complete|= XkmGeometryMask;
    want|= (complete|need);
    if (want&XkmSymbolsMask)
	want|= XkmKeyNamesMask|XkmTypesMask;

    if (want==0)
	return False;

    if (xkb!=NULL) {
	 old_names= xkb->names;
	 finfo.type= 0;
	 finfo.defined= 0;
	 finfo.xkb= xkb;
	 if (!XkbDetermineFileType(&finfo,XkbXKBFile,NULL))
	    return False;
    }
    else old_names= NULL;

    wantConfig= want&(~complete);
    if (xkb!=NULL) {
	if (wantConfig&XkmTypesMask) {
	    if ((!xkb->map) || (xkb->map->num_types<XkbNumRequiredTypes))
		wantConfig&= ~XkmTypesMask;
	}
	if (wantConfig&XkmCompatMapMask) {
	    if ((!xkb->compat) || (xkb->compat->num_si<1))
		wantConfig&= ~XkmCompatMapMask;
	}
	if (wantConfig&XkmSymbolsMask) {
	    if ((!xkb->map) || (!xkb->map->key_sym_map))
		wantConfig&= ~XkmSymbolsMask;
	}
	if (wantConfig&XkmIndicatorsMask) {
	    if (!xkb->indicators)
		wantConfig&= ~XkmIndicatorsMask;
	}
	if (wantConfig&XkmKeyNamesMask) {
	    if ((!xkb->names)||(!xkb->names->keys))
		wantConfig&= ~XkmKeyNamesMask;
	}
	if ((wantConfig&XkmGeometryMask)&&(!xkb->geom))
	    wantConfig&= ~XkmGeometryMask;
    }
    else {
	wantConfig= 0;
    }
    complete|= wantConfig;

    wantDflts= 0;
    wantNames= want&(~complete);
    if ((xkb!=NULL) && (old_names!=NULL)) {
	if (wantNames&XkmTypesMask) {
	    if (old_names->types!=None) {
		tmp= XkbAtomGetString(dpy,old_names->types);
		names->types= _XkbDupString(tmp);
	    }
	    else {
		wantDflts|= XkmTypesMask;
	    }
	    complete|= XkmTypesMask; 
	}
	if (wantNames&XkmCompatMapMask) {
	    if (old_names->compat!=None) {
		tmp= XkbAtomGetString(dpy,old_names->compat);
		names->compat= _XkbDupString(tmp);
	    }
	    else wantDflts|= XkmCompatMapMask;
	    complete|= XkmCompatMapMask; 
	}
	if (wantNames&XkmSymbolsMask) {
	    if (old_names->symbols==None)
		return False;
	    tmp= XkbAtomGetString(dpy,old_names->symbols);
	    names->symbols= _XkbDupString(tmp);
	    complete|= XkmSymbolsMask; 
	}
	if (wantNames&XkmKeyNamesMask) {
	   if (old_names->keycodes!=None) {
		tmp= XkbAtomGetString(dpy,old_names->keycodes);
		names->keycodes= _XkbDupString(tmp);
	    }
	    else wantDflts|= XkmKeyNamesMask;
	    complete|= XkmKeyNamesMask;
	}
	if (wantNames&XkmGeometryMask) {
	    if (old_names->geometry==None)
		return False;
	    tmp= XkbAtomGetString(dpy,old_names->geometry);
	    names->geometry= _XkbDupString(tmp);
	    complete|= XkmGeometryMask; 
	    wantNames&= ~XkmGeometryMask;
	}
    }
    if (complete&XkmCompatMapMask)
	complete|= XkmIndicatorsMask|XkmVirtualModsMask;
    else if (complete&(XkmSymbolsMask|XkmTypesMask))
	complete|= XkmVirtualModsMask;
    if (need & (~complete))
	return False;
    if ((complete&XkmSymbolsMask)&&((XkmKeyNamesMask|XkmTypesMask)&(~complete)))
	return False;

    multi_section= 1;
    if (((complete&XkmKeymapRequired)==XkmKeymapRequired)&&
	((complete&(~XkmKeymapLegal))==0)) {
	fprintf(file,"xkb_keymap \"%s\" {\n",name);
    }
    else if (((complete&XkmSemanticsRequired)==XkmSemanticsRequired)&&
	((complete&(~XkmSemanticsLegal))==0)) {
	fprintf(file,"xkb_semantics \"%s\" {\n",name);
    }
    else if (((complete&XkmLayoutRequired)==XkmLayoutRequired)&&
	((complete&(~XkmLayoutLegal))==0)) {
	fprintf(file,"xkb_layout \"%s\" {\n",name);
    }
    else if (XkmSingleSection(complete&(~XkmVirtualModsMask))) {
	multi_section= 0;
    }
    else {
	return False;
    }

    wantNames= complete&(~(wantConfig|wantDflts));
    name= names->keycodes;
    if (wantConfig&XkmKeyNamesMask)
	XkbWriteXKBKeycodes(file,&finfo,False,False,_AddIncl,name);
    else if (wantDflts&XkmKeyNamesMask)
	fprintf(stderr,"Default symbols not implemented yet!\n");
    else if (wantNames&XkmKeyNamesMask)
	XkbWriteSectionFromName(file,"keycodes",name);

    name= names->types;
    if (wantConfig&XkmTypesMask)
	XkbWriteXKBKeyTypes(file,&finfo,False,False,_AddIncl,name);
    else if (wantDflts&XkmTypesMask)
	fprintf(stderr,"Default types not implemented yet!\n");
    else if (wantNames&XkmTypesMask)
	XkbWriteSectionFromName(file,"types",name);

    name= names->compat;
    if (wantConfig&XkmCompatMapMask)
	XkbWriteXKBCompatMap(file,&finfo,False,False,_AddIncl,name);
    else if (wantDflts&XkmCompatMapMask)
	fprintf(stderr,"Default interps not implemented yet!\n");
    else if (wantNames&XkmCompatMapMask)
	XkbWriteSectionFromName(file,"compatibility",name);

    name= names->symbols;
    if (wantConfig&XkmSymbolsMask)
	XkbWriteXKBSymbols(file,&finfo,False,False,_AddIncl,name);
    else if (wantNames&XkmSymbolsMask)
	XkbWriteSectionFromName(file,"symbols",name);

    name= names->geometry;
    if (wantConfig&XkmGeometryMask)
	XkbWriteXKBGeometry(file,&finfo,False,False,_AddIncl,name);
    else if (wantNames&XkmGeometryMask)
	XkbWriteSectionFromName(file,"geometry",name);

    if (multi_section)
	fprintf(file,"};\n");
    return True;
}

/***====================================================================***/

/*ARGSUSED*/
Status
#if NeedFunctionPrototypes
XkbMergeFile(XkbDescPtr xkb,XkbFileInfo finfo)
#else
XkbMergeFile(xkb,finfo)
    XkbDescPtr	 xkb;
    XkbFileInfo	*finfo;
#endif
{
    return BadImplementation;
}

/***====================================================================***/

int
#if NeedFunctionPrototypes
XkbFindKeycodeByName(XkbDescPtr xkb,char *name,Bool use_aliases)
#else
XkbFindKeycodeByName(xkb,name,use_aliases)
    XkbDescPtr	xkb;
    char *	name;
    Bool	use_aliases;
#endif
{
register int	i;

    if ((!xkb)||(!xkb->names)||(!xkb->names->keys))
	return 0;
    for (i=xkb->min_key_code;i<=xkb->max_key_code;i++) {
	if (strncmp(xkb->names->keys[i].name,name,XkbKeyNameLength)==0)
	    return i;
    }
    if (!use_aliases)
	return 0;
    if (xkb->geom && xkb->geom->key_aliases) {
	XkbKeyAliasPtr	a;
	a= xkb->geom->key_aliases;
	for (i=0;i<xkb->geom->num_key_aliases;i++,a++) {
	    if (strncmp(name,a->alias,XkbKeyNameLength)==0)
		return XkbFindKeycodeByName(xkb,a->real,False);
	}
    }
    if (xkb->names && xkb->names->key_aliases) {
	XkbKeyAliasPtr	a;
	a= xkb->names->key_aliases;
	for (i=0;i<xkb->names->num_key_aliases;i++,a++) {
	    if (strncmp(name,a->alias,XkbKeyNameLength)==0)
		return XkbFindKeycodeByName(xkb,a->real,False);
	}
    }
    return 0;
}


unsigned
#if NeedFunctionPrototypes
XkbConvertGetByNameComponents(Bool toXkm,unsigned orig)
#else
XkbConvertGetByNameComponents(toXkm,orig)
    Bool	toXkm;
    unsigned	orig;
#endif
{
unsigned	rtrn;

    rtrn= 0;
    if (toXkm) {
	if (orig&XkbGBN_TypesMask)		rtrn|= XkmTypesMask;
	if (orig&XkbGBN_CompatMapMask)		rtrn|= XkmCompatMapMask;
	if (orig&XkbGBN_SymbolsMask)		rtrn|= XkmSymbolsMask;
	if (orig&XkbGBN_IndicatorMapMask)	rtrn|= XkmIndicatorsMask;
	if (orig&XkbGBN_KeyNamesMask)		rtrn|= XkmKeyNamesMask;
	if (orig&XkbGBN_GeometryMask)		rtrn|= XkmGeometryMask;
    }
    else {
	if (orig&XkmTypesMask)			rtrn|= XkbGBN_TypesMask;
	if (orig&XkmCompatMapMask)		rtrn|= XkbGBN_CompatMapMask;
	if (orig&XkmSymbolsMask)		rtrn|= XkbGBN_SymbolsMask;
	if (orig&XkmIndicatorsMask)		rtrn|= XkbGBN_IndicatorMapMask;
	if (orig&XkmKeyNamesMask)		rtrn|= XkbGBN_KeyNamesMask;
	if (orig&XkmGeometryMask)		rtrn|= XkbGBN_GeometryMask;
	if (orig!=0)				rtrn|= XkbGBN_OtherNamesMask;
    }
    return rtrn;
}

unsigned
#if NeedFunctionPrototypes
XkbConvertXkbComponents(Bool toXkm,unsigned orig)
#else
XkbConvertXkbComponents(toXkm,orig)
    Bool		toXkm;
    unsigned 		orig;
#endif
{
unsigned	rtrn;

    rtrn= 0;
    if (toXkm) {
	if (orig&XkbClientMapMask)	rtrn|= XkmTypesMask|XkmSymbolsMask;
	if (orig&XkbServerMapMask)	rtrn|= XkmTypesMask|XkmSymbolsMask;
	if (orig&XkbCompatMapMask)	rtrn|= XkmCompatMapMask;
	if (orig&XkbIndicatorMapMask)	rtrn|= XkmIndicatorsMask;
	if (orig&XkbNamesMask)		rtrn|= XkmKeyNamesMask;
	if (orig&XkbGeometryMask)	rtrn|= XkmGeometryMask;
    }
    else {
	if (orig!=0)			rtrn|= XkbNamesMask;
	if (orig&XkmTypesMask)		rtrn|= XkbClientMapMask;
	if (orig&XkmCompatMapMask)
		rtrn|= XkbCompatMapMask|XkbIndicatorMapMask;
	if (orig&XkmSymbolsMask)	rtrn|=XkbClientMapMask|XkbServerMapMask;
	if (orig&XkmIndicatorsMask)	rtrn|= XkbIndicatorMapMask;
	if (orig&XkmKeyNamesMask)	
		rtrn|= XkbNamesMask|XkbIndicatorMapMask;
	if (orig&XkmGeometryMask)	rtrn|= XkbGeometryMask;
    }
    return rtrn;
}

Bool
#if NeedFunctionPrototypes
XkbDetermineFileType(XkbFileInfoPtr finfo,int format,int *opts_missing)
#else
XkbDetermineFileType(finfo,format,opts_missing)
    XkbFileInfoPtr	finfo;
    int			format;
    int *		opts_missing;
#endif
{
unsigned	present;
XkbDescPtr	xkb;

    if ((!finfo)||(!finfo->xkb))
	return False;
    if (opts_missing)
	*opts_missing= 0;
    xkb= finfo->xkb;
    present= 0;
    if ((xkb->names)&&(xkb->names->keys))	present|= XkmKeyNamesMask;
    if ((xkb->map)&&(xkb->map->types))		present|= XkmTypesMask;
    if (xkb->compat)				present|= XkmCompatMapMask;
    if ((xkb->map)&&(xkb->map->num_syms>1))	present|= XkmSymbolsMask;
    if (xkb->indicators)			present|= XkmIndicatorsMask;
    if (xkb->geom)				present|= XkmGeometryMask;
    if (!present)
	return False;
    else switch (present) {
	case XkmKeyNamesMask:	
	    finfo->type= 	XkmKeyNamesIndex;
	    finfo->defined= 	present;
	    return True;
	case XkmTypesMask:
	    finfo->type=	XkmTypesIndex;
	    finfo->defined= 	present;
	    return True;
	case XkmCompatMapMask:	
	    finfo->type=	XkmCompatMapIndex;
	    finfo->defined=	present;
	    return True;
	case XkmSymbolsMask:	
	    if (format!=XkbXKMFile) {
		finfo->type= 	XkmSymbolsIndex;
		finfo->defined=	present;
		return True;
	    }
	    break;
	case XkmGeometryMask:	
	    finfo->type=	XkmGeometryIndex;
	    finfo->defined=	present;
	    return True;
    }
    if ((present&(~XkmSemanticsLegal))==0) {
	if ((XkmSemanticsRequired&present)==XkmSemanticsRequired) {
	    if (opts_missing)
		*opts_missing= XkmSemanticsOptional&(~present);
	    finfo->type= 	XkmSemanticsFile;
	    finfo->defined=	present;
	    return True;
	}
    }
    else if ((present&(~XkmLayoutLegal))==0) {
	if ((XkmLayoutRequired&present)==XkmLayoutRequired) {
	    if (opts_missing)
		*opts_missing= XkmLayoutOptional&(~present);
	    finfo->type=	XkmLayoutFile;
	    finfo->defined=	present;
	    return True;
	}
    }
    else if ((present&(~XkmKeymapLegal))==0) {
	if ((XkmKeymapRequired&present)==XkmKeymapRequired) {
	    if (opts_missing)
		*opts_missing= XkmKeymapOptional&(~present);
	    finfo->type=	XkmKeymapFile;
	    finfo->defined=	present;
	    return True;
	}
    }
    return False;
}

/* all latin-1 alphanumerics, plus parens, slash, minus, underscore and */
/* wildcards */

static unsigned char componentSpecLegal[] = {
	0x00, 0x00, 0x00, 0x00, 0x00, 0xa7, 0xff, 0x83,
	0xfe, 0xff, 0xff, 0x87, 0xfe, 0xff, 0xff, 0x07,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x7f, 0xff
};

void
#if NeedFunctionPrototypes
XkbEnsureSafeMapName(char *name)
#else
XkbEnsureSafeMapName(name)
    char *name;
#endif
{
   if (name==NULL)
        return;
    while (*name!='\0') {
	if ((componentSpecLegal[(*name)/8]&(1<<((*name)%8)))==0)
	    *name= '_';
        name++;
    }
    return;
}

/***====================================================================***/

#define	UNMATCHABLE(c)	(((c)=='(')||((c)==')')||((c)=='/'))

Bool
#if NeedFunctionPrototypes
XkbNameMatchesPattern(char *name,char *ptrn)
#else
XkbNameMatchesPattern(name,ptrn)
    char *	name;
    char *	ptrn;
#endif
{
    while (ptrn[0]!='\0') {
	if (name[0]=='\0') {
	    if (ptrn[0]=='*') {
		ptrn++;
		continue;
	    }
	    return False;
	}
	if (ptrn[0]=='?') {
	    if (UNMATCHABLE(name[0]))
		return False;
	}
	else if (ptrn[0]=='*') {
	    if ((!UNMATCHABLE(name[0]))&&XkbNameMatchesPattern(name+1,ptrn))
		return True;
	    return XkbNameMatchesPattern(name,ptrn+1);
	}
	else if (ptrn[0]!=name[0])
	    return False;
	name++;
	ptrn++;
    }
    /* if we get here, the pattern is exhausted (-:just like me:-) */
    return (name[0]=='\0');
}