/***************************************************************************
(C) Copyright 1996 Apple Computer, Inc., AT&T Corp., International             
Business Machines Corporation and Siemens Rolm Communications Inc.             
                                                                               
For purposes of this license notice, the term Licensors shall mean,            
collectively, Apple Computer, Inc., AT&T Corp., International                  
Business Machines Corporation and Siemens Rolm Communications Inc.             
The term Licensor shall mean any of the Licensors.                             
                                                                               
Subject to acceptance of the following conditions, permission is hereby        
granted by Licensors without the need for written agreement and without        
license or royalty fees, to use, copy, modify and distribute this              
software for any purpose.                                                      
                                                                               
The above copyright notice and the following four paragraphs must be           
reproduced in all copies of this software and any software including           
this software.                                                                 
                                                                               
THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS AND NO LICENSOR SHALL HAVE       
ANY OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS OR       
MODIFICATIONS.                                                                 
                                                                               
IN NO EVENT SHALL ANY LICENSOR BE LIABLE TO ANY PARTY FOR DIRECT,              
INDIRECT, SPECIAL OR CONSETQUENTIAL DAMAGES OR LOST PROFITS ARISING OUT         
OF THE USE OF THIS SOFTWARE EVEN IF ADVISED OF THE POSSIBILITY OF SUCH         
DAMAGE.                                                                        
                                                                               
EACH LICENSOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED,       
INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF NONINFRINGEMENT OR THE            
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR             
PURPOSE.                                                                       

The software is provided with RESTRICTED RIGHTS.  Use, duplication, or         
disclosure by the government are subject to restrictions set forth in          
DFARS 252.227-7013 or 48 CFR 52.227-19, as applicable.                         

***************************************************************************/

/*
 * src: vobject.c
 * doc: vobject and APIs to construct vobject, APIs pretty print 
 * vobject, and convert a vobject into its textual representation.
 */

#include <stdlib.h>

#include "vobject.h"
#include <string.h>
#include <stdio.h>


#define NAME_OF(o)			o->id
#define VALUE_TYPE(o)			o->valType
#define STRINGZ_VALUE_OF(o)		o->val.strs
#define USTRINGZ_VALUE_OF(o)	o->val.ustrs
#define INTEGER_VALUE_OF(o)		o->val.i
#define LONG_VALUE_OF(o)		o->val.l
#define ANY_VALUE_OF(o)			o->val.any
#define VOBJECT_VALUE_OF(o)		o->val.vobj

const char** fieldedProp;



/*----------------------------------------------------------------------
   The following functions involve with memory allocation:
	newVObject
	deleteVObject
	dupStr
	deleteStr
	newStrItem
	deleteStrItem
   ----------------------------------------------------------------------*/

VObject* newVObject_(const char *id)
{
    VObject *p = (VObject*)malloc(sizeof(VObject));
    p->next = 0;
    p->id = id;
    p->prop = 0;
    VALUE_TYPE(p) = 0;
    ANY_VALUE_OF(p) = 0;
    return p;
}

VObject* newVObject(const char *id)
{
    return newVObject_(lookupStr(id));
}

void deleteVObject(VObject *p)
{
  if (p->id)
    unUseStr(p->id);
  if (p)
    free(p);
  p = NULL;
}

char* dupStr(const char *s, unsigned int size)
{
    char *t;
    if  (size == 0) {
	size = strlen(s);
	}
    t = (char*)malloc(size+1);
    if (t) {
	memcpy(t,s,size);
	t[size] = 0;
	return t;
	}
    else {
	return (char*)0;
	}
}

void deleteStr(const char *p)
{
    if (p) 
      free((void*)p);
    p = NULL;
}


static StrItem* newStrItem(const char *s, StrItem *next)
{
    StrItem *p = (StrItem*)malloc(sizeof(StrItem));
    p->next = next;
    p->s = s;
    p->refCnt = 1;
    return p;
}

static void deleteStrItem(StrItem *p)
{
    if (p)
      free((void*)p);
    p = NULL;
}


/*----------------------------------------------------------------------
  The following function provide accesses to VObject's value.
  ----------------------------------------------------------------------*/

const char* vObjectName(VObject *o)
{
    return NAME_OF(o);
}

void setVObjectName(VObject *o, const char* id)
{
    NAME_OF(o) = id;
}

const char* vObjectStringZValue(VObject *o)
{
    return STRINGZ_VALUE_OF(o);
}

void setVObjectStringZValue(VObject *o, const char *s)
{
    STRINGZ_VALUE_OF(o) = dupStr(s,0);
    VALUE_TYPE(o) = VCVT_STRINGZ;
}

void setVObjectStringZValue_(VObject *o, const char *s)
{
    STRINGZ_VALUE_OF(o) = s;
    VALUE_TYPE(o) = VCVT_STRINGZ;
}

const wchar_t* vObjectUStringZValue(VObject *o)
{
    return USTRINGZ_VALUE_OF(o);
}

void setVObjectUStringZValue(VObject *o, const wchar_t *s)
{
    USTRINGZ_VALUE_OF(o) = (wchar_t*) dupStr((char*)s,(uStrLen(s)+1)*2);
    VALUE_TYPE(o) = VCVT_USTRINGZ;
}

void setVObjectUStringZValue_(VObject *o, const wchar_t *s)
{
    USTRINGZ_VALUE_OF(o) = s;
    VALUE_TYPE(o) = VCVT_USTRINGZ;
}

unsigned int vObjectIntegerValue(VObject *o)
{
    return INTEGER_VALUE_OF(o);
}

void setVObjectIntegerValue(VObject *o, unsigned int i)
{
    INTEGER_VALUE_OF(o) = i;
    VALUE_TYPE(o) = VCVT_UINT;
}

unsigned long vObjectLongValue(VObject *o)
{
    return LONG_VALUE_OF(o);
}

void setVObjectLongValue(VObject *o, unsigned long l)
{
    LONG_VALUE_OF(o) = l;
    VALUE_TYPE(o) = VCVT_ULONG;
}

void* vObjectAnyValue(VObject *o)
{
    return ANY_VALUE_OF(o);
}

void setVObjectAnyValue(VObject *o, void *t)
{
    ANY_VALUE_OF(o) = t;
    VALUE_TYPE(o) = VCVT_RAW;
}

VObject* vObjectVObjectValue(VObject *o)
{
    return VOBJECT_VALUE_OF(o);
}

void setVObjectVObjectValue(VObject *o, VObject *p)
{
    VOBJECT_VALUE_OF(o) = p;
    VALUE_TYPE(o) = VCVT_VOBJECT;
}

int vObjectValueType(VObject *o)
{
    return VALUE_TYPE(o);
}


/*----------------------------------------------------------------------
  The following functions can be used to build VObject.
  ----------------------------------------------------------------------*/

VObject* addVObjectProp(VObject *o, VObject *p)
{
    /* circular link list pointed to tail */
    /*
    o {next,id,prop,val}
                V
	pn {next,id,prop,val}
             V
	    ...
	p1 {next,id,prop,val}
             V
	     pn
    -->
    o {next,id,prop,val}
                V
	pn {next,id,prop,val}
             V
	p {next,id,prop,val}
	    ...
	p1 {next,id,prop,val}
             V
	     pn
    */

    VObject *tail = o->prop;
    if (tail) {
	p->next = tail->next;
	o->prop = tail->next = p;
	}
    else {
	o->prop = p->next = p;
	}
    return p;
}

VObject* addProp(VObject *o, const char *id)
{
    return addVObjectProp(o,newVObject(id));
}

VObject* addProp_(VObject *o, const char *id)
{
    return addVObjectProp(o,newVObject_(id));
}

void addList(VObject **o, VObject *p)
{
    p->next = 0;
    if (*o == 0) {
	*o = p;
	}
    else {
	VObject *t = *o;
	while (t->next) {
	   t = t->next;
	   }
	t->next = p;
	}
}

VObject* nextVObjectInList(VObject *o)
{
    return o->next;
}

VObject* setValueWithSize_(VObject *prop, void *val, unsigned int size)
{
    VObject *sizeProp;
    setVObjectAnyValue(prop, val);
    sizeProp = addProp(prop,VCDataSizeProp);
    setVObjectLongValue(sizeProp, size);
    return prop;
}

VObject* setValueWithSize(VObject *prop, void *val, unsigned int size)
{
    void *p = dupStr(val,size);
    return setValueWithSize_(prop,p,p?size:0);
}

void initPropIterator(VObjectIterator *i, VObject *o)
{
    i->start = o->prop; 
    i->next = 0;
}

void initVObjectIterator(VObjectIterator *i, VObject *o)
{
    i->start = o->next; 
    i->next = 0;
}

int moreIteration(VObjectIterator *i)
{ 
    return (i->start && (i->next==0 || i->next!=i->start));
}

VObject* nextVObject(VObjectIterator *i)
{
    if (i->start && i->next != i->start) {
	if (i->next == 0) {
	    i->next = i->start->next;
	    return i->next;
	    }
	else {
	    i->next = i->next->next;
	    return i->next;
	    }
	}
    else return (VObject*)0;
}

VObject* isAPropertyOf(VObject *o, const char *id)
{
    VObjectIterator i;
    initPropIterator(&i,o);
    while (moreIteration(&i)) {
	VObject *each = nextVObject(&i);
	if (!strcasecmp(id,each->id))
	    return each;
	}
    return (VObject*)0;
}

VObject* addGroup(VObject *o, const char *g)
{
    /*
	a.b.c
	-->
	prop(c)
	    prop(VCGrouping=b)
		prop(VCGrouping=a)
     */
    char *dot = strrchr(g,'.');
    if (dot) {
	VObject *p, *t;
	char *gs, *n = dot+1;
	gs = dupStr(g,0);	/* so we can write to it. */
	/* used to be
	* t = p = addProp_(o,lookupProp_(n));
	*/
	t = p = addProp_(o,lookupProp(n));
	dot = strrchr(gs,'.');
	*dot = 0;
	do {
	    dot = strrchr(gs,'.');
	    if (dot) {
		n = dot+1;
		*dot=0;
		}
	    else
		n = gs;
	    /* property(VCGroupingProp=n);
	     *	and the value may have VCGrouping property
	     */
	    t = addProp(t,VCGroupingProp);
	    setVObjectStringZValue(t,lookupProp_(n));
	    } while (n != gs);
	deleteStr(gs);	
	return p;
	}
    else
	return addProp_(o,lookupProp(g));
}

VObject* addPropValue(VObject *o, const char *p, const char *v)
{
    VObject *prop;
    prop = addProp(o,p);
    setVObjectUStringZValue_(prop, fakeUnicode(v,0));
    return prop;
}

VObject* addPropSizedValue_(VObject *o, const char *p, const char *v,
	unsigned int size)
{
    VObject *prop;
    prop = addProp(o,p);
    setValueWithSize_(prop, (void*)v, size);
    return prop;
}

VObject* addPropSizedValue(VObject *o, const char *p, const char *v,
	unsigned int size)
{
    return addPropSizedValue_(o,p,dupStr(v,size),size);
}



/*----------------------------------------------------------------------
  The following pretty print a VObject
  ----------------------------------------------------------------------*/

static void printVObject_(FILE *fp, VObject *o, int level);

static void indent(FILE *fp, int level)
{
    int i;
    for (i=0;i<level*4;i++) {
	fputc(' ', fp);
	}
}

static void printValue(FILE *fp, VObject *o, int level)
{
    switch (VALUE_TYPE(o)) {
	case VCVT_USTRINGZ: {
	    char c;
            char *t,*s;
	    s = t = fakeCString(USTRINGZ_VALUE_OF(o));
	    fputc('"',fp);
	    while (c=*t,c) {
	        fputc(c,fp);
		if (c == '\n') indent(fp,level+2);
		t++;
		}
	    fputc('"',fp);
	    deleteStr(s);
	    break;
	    }
	case VCVT_STRINGZ: {
	    char c;
	    const char *s = STRINGZ_VALUE_OF(o);
	    fputc('"',fp);
	    while (c=*s,c) {
	        fputc(c,fp);
		if (c == '\n') indent(fp,level+2);
		s++;
		}
	    fputc('"',fp);
	    break;
	    }
	case VCVT_UINT:
	    fprintf(fp,"%d", INTEGER_VALUE_OF(o)); break;
	case VCVT_ULONG:
	    fprintf(fp,"%ld", LONG_VALUE_OF(o)); break;
	case VCVT_RAW:
	    fprintf(fp,"[raw data]"); break;
	case VCVT_VOBJECT:
	    fprintf(fp,"[vobject]\n");
	    printVObject_(fp,VOBJECT_VALUE_OF(o),level+1);
	    break;
	case 0:
	    fprintf(fp,"[none]"); break;
	default:
	    fprintf(fp,"[unknown]"); break;
	}
}

static void printNameValue(FILE *fp,VObject *o, int level)
{
    indent(fp,level);
    if (NAME_OF(o)) {
	fprintf(fp,"%s", NAME_OF(o));
	}
    if (VALUE_TYPE(o)) {
	fputc('=',fp);
	printValue(fp,o, level);
	}
    fprintf(fp,"\n");
}

static void printVObject_(FILE *fp, VObject *o, int level)
    {
    VObjectIterator t;
    if (o == 0) {
	fprintf(fp,"[NULL]\n");
	return;
	}
    printNameValue(fp,o,level);
    initPropIterator(&t,o);
    while (moreIteration(&t)) {
	VObject *eachProp = nextVObject(&t);
	printVObject_(fp,eachProp,level+1);
	}
    }

void printVObject(FILE *fp,VObject *o)
{
    printVObject_(fp,o,0);
}

void printVObjectToFile(char *fname,VObject *o)
{
    FILE *fp = fopen(fname,"w");
    if (fp) {
	printVObject(fp,o);
	fclose(fp);
	}
}

void printVObjectsToFile(char *fname,VObject *list)
{
    FILE *fp = fopen(fname,"w");
    if (fp) {
	while (list) {
	    printVObject(fp,list);
	    list = nextVObjectInList(list);
	    }
	fclose(fp);
	}
}

void cleanVObject(VObject *o)
{
    if (o == 0) return;
    if (o->prop) {
	/* destroy time: cannot use the iterator here.
	   Have to break the cycle in the circular link
	   list and turns it into regular NULL-terminated
	   list -- since at some point of destruction,
	   the reference entry for the iterator to work
	   will not longer be valid.
	   */
	VObject *p;
	p = o->prop->next;
	o->prop->next = 0;
	do {
	   VObject *t = p->next;
	   cleanVObject(p);
	   p = t;
	   } while (p);
	}
    switch (VALUE_TYPE(o)) {
	case VCVT_USTRINGZ:
	case VCVT_STRINGZ:
	case VCVT_RAW:
	    /* assume they are all allocated by malloc. */
	    free((char*)STRINGZ_VALUE_OF(o));
	    break;
	case VCVT_VOBJECT:
	    cleanVObject(VOBJECT_VALUE_OF(o));
	    break;
	}
    deleteVObject(o);
}

void cleanVObjects(VObject *list)
{
    while (list) {
	VObject *t = list;
	list = nextVObjectInList(list);
	cleanVObject(t);
	}
}

/*----------------------------------------------------------------------
  The following is a String Table Facilities.
  ----------------------------------------------------------------------*/

#define STRTBLSIZE 255

static StrItem *strTbl[STRTBLSIZE];

static unsigned int hashStr(const char *s)
{
    unsigned int h = 0;
    int i;
    for (i=0;s[i];i++) {
	h += s[i]*i;
	}
    return h % STRTBLSIZE;
}

const char* lookupStr(const char *s)
{
  char *newS;

  StrItem *t;
  unsigned int h = hashStr(s);
  if ((t = strTbl[h]) != 0) {
    do {
      if (strcasecmp(t->s,s) == 0) {
	t->refCnt++;
	return t->s;
      }
      t = t->next;
    } while (t);
  }
  newS = dupStr(s,0);
  strTbl[h] = newStrItem(newS,strTbl[h]);
  return newS;
}

void unUseStr(const char *s)
{
    StrItem *cur, *prev;

    unsigned int h = hashStr(s);
    cur = strTbl[h];
    prev = cur;
    while (cur != 0) {
      if (strcasecmp(cur->s,s) == 0) {
	cur->refCnt--;
	/* if that was the last reference to this string, kill it. */
	if (cur->refCnt == 0) {
	  if (cur == strTbl[h]) {
	    strTbl[h] = cur->next;
	    deleteStr(prev->s);
	    deleteStrItem(prev);
	  } else {
	    prev->next = cur->next;
	    deleteStr(cur->s);
	    deleteStrItem(cur);
	  }
	  return;
	}
      }
      prev = cur;
      cur = cur->next;
    }
}

void cleanStrTbl()
{
  int i;
  for (i=0; i<STRTBLSIZE;i++) {
    StrItem *t = strTbl[i];
    while (t) {
      StrItem *p;
      deleteStr(t->s);
      p = t;
      t = t->next;
      deleteStrItem(p);
    }
    strTbl[i] = 0;
  }
}


struct PreDefProp {
    const char *name;
    const char *alias;
    const char** fields;
    unsigned int flags;
    };

/* flags in PreDefProp */
#define PD_BEGIN	0x1
#define PD_INTERNAL	0x2

static const char *adrFields[] = {
    VCPostalBoxProp,
    VCExtAddressProp,
    VCStreetAddressProp,
    VCCityProp,
    VCRegionProp,
    VCPostalCodeProp,
    VCCountryNameProp,
    0
};

static const char *nameFields[] = {
    VCFamilyNameProp,
    VCGivenNameProp,
    VCAdditionalNamesProp,
    VCNamePrefixesProp,
    VCNameSuffixesProp,
    NULL
    };

static const char *orgFields[] = {
    VCOrgNameProp,
    VCOrgUnitProp,
    VCOrgUnit2Prop,
    VCOrgUnit3Prop,
    VCOrgUnit4Prop,
    NULL
    };

static const char *AAlarmFields[] = {
    VCRunTimeProp,
    VCSnoozeTimeProp,
    VCRepeatCountProp,
    VCAudioContentProp,
    0
    };

/* ExDate -- has unamed fields */
/* RDate -- has unamed fields */

static const char *DAlarmFields[] = {
    VCRunTimeProp,
    VCSnoozeTimeProp,
    VCRepeatCountProp,
    VCDisplayStringProp,
    0
    };

static const char *MAlarmFields[] = {
    VCRunTimeProp,
    VCSnoozeTimeProp,
    VCRepeatCountProp,
    VCEmailAddressProp,
    VCNoteProp,
    0
    };

static const char *PAlarmFields[] = {
    VCRunTimeProp,
    VCSnoozeTimeProp,
    VCRepeatCountProp,
    VCProcedureNameProp,
    0
    };

static struct PreDefProp propNames[] = {
    { VC7bitProp, 0, 0, 0 },
    { VC8bitProp, 0, 0, 0 },
    { VCAAlarmProp, 0, AAlarmFields, 0 },
    { VCAdditionalNamesProp, 0, 0, 0 },
    { VCAdrProp, 0, adrFields, 0 },
    { VCAgentProp, 0, 0, 0 },
    { VCAIFFProp, 0, 0, 0 },
    { VCAOLProp, 0, 0, 0 },
    { VCAppleLinkProp, 0, 0, 0 },
    { VCAttachProp, 0, 0, 0 },
    { VCAttendeeProp, 0, 0, 0 },
    { VCATTMailProp, 0, 0, 0 },
    { VCAudioContentProp, 0, 0, 0 },
    { VCAVIProp, 0, 0, 0 },
    { VCBase64Prop, 0, 0, 0 },
    { VCBBSProp, 0, 0, 0 },
    { VCBirthDateProp, 0, 0, 0 },
    { VCBMPProp, 0, 0, 0 },
    { VCBodyProp, 0, 0, 0 },
    { VCBusinessRoleProp, 0, 0, 0 },
    { VCCalProp, 0, 0, PD_BEGIN },
    { VCCaptionProp, 0, 0, 0 },
    { VCCardProp, 0, 0, PD_BEGIN },
    { VCCarProp, 0, 0, 0 },
    { VCCategoriesProp, 0, 0, 0 },
    { VCCellularProp, 0, 0, 0 },
    { VCCGMProp, 0, 0, 0 },
    { VCCharSetProp, 0, 0, 0 },
    { VCCIDProp, VCContentIDProp, 0, 0 },
    { VCCISProp, 0, 0, 0 },
    { VCCityProp, 0, 0, 0 },
    { VCClassProp, 0, 0, 0 },
    { VCCommentProp, 0, 0, 0 },
    { VCCompletedProp, 0, 0, 0 },
    { VCContentIDProp, 0, 0, 0 },
    { VCCountryNameProp, 0, 0, 0 },
    { VCDAlarmProp, 0, DAlarmFields, 0 },
    { VCDataSizeProp, 0, 0, PD_INTERNAL },
    { VCDayLightProp, 0, 0, 0 },
    { VCDCreatedProp, 0, 0, 0 },
    { VCDeliveryLabelProp, 0, 0, 0 },
    { VCDescriptionProp, 0, 0, 0 },
    { VCDIBProp, 0, 0, 0 },
    { VCDisplayStringProp, 0, 0, 0 },
    { VCDomesticProp, 0, 0, 0 },
    { VCDTendProp, 0, 0, 0 },
    { VCDTstartProp, 0, 0, 0 },
    { VCDueProp, 0, 0, 0 },
    { VCEmailAddressProp, 0, 0, 0 },
    { VCEncodingProp, 0, 0, 0 },
    { VCEndProp, 0, 0, 0 },
    { VCEventProp, 0, 0, PD_BEGIN },
    { VCEWorldProp, 0, 0, 0 },
    { VCExNumProp, 0, 0, 0 },
    { VCExDateProp, 0, 0, 0 },
    { VCExpectProp, 0, 0, 0 },
    { VCExtAddressProp, 0, 0, 0 },
    { VCFamilyNameProp, 0, 0, 0 },
    { VCFaxProp, 0, 0, 0 },
    { VCFullNameProp, 0, 0, 0 },
    { VCGeoLocationProp, 0, 0, 0 },
    { VCGeoProp, 0, 0, 0 },
    { VCGIFProp, 0, 0, 0 },
    { VCGivenNameProp, 0, 0, 0 },
    { VCGroupingProp, 0, 0, 0 },
    { VCHomeProp, 0, 0, 0 },
    { VCIBMMailProp, 0, 0, 0 },
    { VCInlineProp, 0, 0, 0 },
    { VCInternationalProp, 0, 0, 0 },
    { VCInternetProp, 0, 0, 0 },
    { VCISDNProp, 0, 0, 0 },
    { VCJPEGProp, 0, 0, 0 },
    { VCLanguageProp, 0, 0, 0 },
    { VCLastModifiedProp, 0, 0, 0 },
    { VCLastRevisedProp, 0, 0, 0 },
    { VCLocationProp, 0, 0, 0 },
    { VCLogoProp, 0, 0, 0 },
    { VCMailerProp, 0, 0, 0 },
    { VCMAlarmProp, 0, MAlarmFields, 0 },
    { VCMCIMailProp, 0, 0, 0 },
    { VCMessageProp, 0, 0, 0 },
    { VCMETProp, 0, 0, 0 },
    { VCModemProp, 0, 0, 0 },
    { VCMPEG2Prop, 0, 0, 0 },
    { VCMPEGProp, 0, 0, 0 },
    { VCMSNProp, 0, 0, 0 },
    { VCNamePrefixesProp, 0, 0, 0 },
    { VCNameProp, 0, nameFields, 0 },
    { VCNameSuffixesProp, 0, 0, 0 },
    { VCNoteProp, 0, 0, 0 },
    { VCOrgNameProp, 0, 0, 0 },
    { VCOrgProp, 0, orgFields, 0 },
    { VCOrgUnit2Prop, 0, 0, 0 },
    { VCOrgUnit3Prop, 0, 0, 0 },
    { VCOrgUnit4Prop, 0, 0, 0 },
    { VCOrgUnitProp, 0, 0, 0 },
    { VCPagerProp, 0, 0, 0 },
    { VCPAlarmProp, 0, PAlarmFields, 0 },
    { VCParcelProp, 0, 0, 0 },
    { VCPartProp, 0, 0, 0 },
    { VCPCMProp, 0, 0, 0 },
    { VCPDFProp, 0, 0, 0 },
    { VCPGPProp, 0, 0, 0 },
    { VCPhotoProp, 0, 0, 0 },
    { VCPICTProp, 0, 0, 0 },
    { VCPMBProp, 0, 0, 0 },
    { VCPostalBoxProp, 0, 0, 0 },
    { VCPostalCodeProp, 0, 0, 0 },
    { VCPostalProp, 0, 0, 0 },
    { VCPowerShareProp, 0, 0, 0 },
    { VCPreferredProp, 0, 0, 0 },
    { VCPriorityProp, 0, 0, 0 },
    { VCProcedureNameProp, 0, 0, 0 },
    { VCProdIdProp, 0, 0, 0 },
    { VCProdigyProp, 0, 0, 0 },
    { VCPronunciationProp, 0, 0, 0 },
    { VCPSProp, 0, 0, 0 },
    { VCPublicKeyProp, 0, 0, 0 },
    { VCTQPProp, VCQuotedPrintableProp, 0, 0 },
    { VCQuickTimeProp, 0, 0, 0 },
    { VCQuotedPrintableProp, 0, 0, 0 },
    { VCRDateProp, 0, 0, 0 },
    { VCRegionProp, 0, 0, 0 },
    { VCRelatedToProp, 0, 0, 0 },
    { VCRepeatCountProp, 0, 0, 0 },
    { VCResourcesProp, 0, 0, 0 },
    { VCRNumProp, 0, 0, 0 },
    { VCRoleProp, 0, 0, 0 },
    { VCRRuleProp, 0, 0, 0 },
    { VCRSVPProp, 0, 0, 0 },
    { VCRunTimeProp, 0, 0, 0 },
    { VCSequenceProp, 0, 0, 0 },
    { VCSnoozeTimeProp, 0, 0, 0 },
    { VCStartProp, 0, 0, 0 },
    { VCStatusProp, 0, 0, 0 },
    { VCStreetAddressProp, 0, 0, 0 },
    { VCSubTypeProp, 0, 0, 0 },
    { VCSummaryProp, 0, 0, 0 },
    { VCTelephoneProp, 0, 0, 0 },
    { VCTIFFProp, 0, 0, 0 },
    { VCTimeZoneProp, 0, 0, 0 },
    { VCTitleProp, 0, 0, 0 },
    { VCTLXProp, 0, 0, 0 },
    { VCTodoProp, 0, 0, PD_BEGIN },
    { VCTranspProp, 0, 0, 0 },
    { VCUniqueStringProp, 0, 0, 0 },
    { VCURLProp, 0, 0, 0 },
    { VCURLValueProp, 0, 0, 0 },
    { VCValueProp, 0, 0, 0 },
    { VCVersionProp, 0, 0, 0 },
    { VCVideoProp, 0, 0, 0 },
    { VCVoiceProp, 0, 0, 0 },
    { VCWAVEProp, 0, 0, 0 },
    { VCWMFProp, 0, 0, 0 },
    { VCWorkProp, 0, 0, 0 },
    { VCX400Prop, 0, 0, 0 },
    { VCX509Prop, 0, 0, 0 },
    { VCXRuleProp, 0, 0, 0 },
    { 0,0,0,0 }
    };


static struct PreDefProp* lookupPropInfo(const char* str)
{
    /* brute force for now, could use a hash table here. */
    int i;
	
    for (i = 0; propNames[i].name; i++)
	if (strcasecmp(str, propNames[i].name) == 0) {
	    return &propNames[i];
	    }
    
    return 0;
}


const char* lookupProp_(const char* str)
{
    int i;
	
    for (i = 0; propNames[i].name; i++)
	if (strcasecmp(str, propNames[i].name) == 0) {
	    const char* s;
	    s = propNames[i].alias?propNames[i].alias:propNames[i].name;
	    return lookupStr(s);
	    }
    return lookupStr(str);
}


const char* lookupProp(const char* str)
{
    int i;
	
    for (i = 0; propNames[i].name; i++)
	if (strcasecmp(str, propNames[i].name) == 0) {
	    const char *s;
	    fieldedProp = propNames[i].fields;
	    s = propNames[i].alias?propNames[i].alias:propNames[i].name;
	    return lookupStr(s);
	    }
    fieldedProp = 0;
    return lookupStr(str);
}


/*----------------------------------------------------------------------
  APIs to Output text form.
  ----------------------------------------------------------------------*/
#define OFILE_REALLOC_SIZE 256
typedef struct OFile {
    FILE *fp;
    char *s;
    int len;
    int limit;
    int alloc:1;
    int fail:1;
    } OFile;


/* vCalendar files need crlf linebreaks. The disabled functions didn't provide
   that. */
#if 0

static void appendsOFile(OFile *fp, const char *s)
{
    int slen;
    if (fp->fail) return;
    slen  = strlen(s);
    if (fp->fp) {
	fwrite(s,1,slen,fp->fp);
	}
    else {
stuff:
	if (fp->len + slen < fp->limit) {
	    memcpy(fp->s+fp->len,s,slen);
	    fp->len += slen;
	    return;
	    }
	else if (fp->alloc) {
	    fp->limit = fp->limit + OFILE_REALLOC_SIZE;
	    if (OFILE_REALLOC_SIZE <= slen) fp->limit += slen;
	    if (fp->s)
	      fp->s = realloc(fp->s,fp->limit);
	    else
	      fp->s = malloc(fp->limit);
	    if (fp->s) goto stuff;
	    }
	if (fp->alloc)
	    free(fp->s);
	fp->s = 0;
	fp->fail = 1;
	}
}

static void appendcOFile(OFile *fp, char c)
{
    if (fp->fail) return;
    if (fp->fp) {
	fputc(c,fp->fp);
	}
    else {
stuff:
	if (fp->len+1 < fp->limit) {
	    fp->s[fp->len] = c;
	    fp->len++;
	    return;
	    }
	else if (fp->alloc) {
	    fp->limit = fp->limit + OFILE_REALLOC_SIZE;
	    fp->s = realloc(fp->s,fp->limit);
	    if (fp->s) goto stuff;
	    }
	if (fp->alloc)
	    free(fp->s);
	fp->s = 0;
	fp->fail = 1;
	}
}

#else

static void appendcOFile_(OFile *fp, char c)
{
    if (fp->fail) return;
    if (fp->fp) {
	fputc(c,fp->fp);
	}
    else {
stuff:
	if (fp->len+1 < fp->limit) {
	    fp->s[fp->len] = c;
	    fp->len++;
	    return;
	    }
	else if (fp->alloc) {
	    fp->limit = fp->limit + OFILE_REALLOC_SIZE;
	    fp->s = realloc(fp->s,fp->limit);
	    if (fp->s) goto stuff;
	    }
	if (fp->alloc)
	    free(fp->s);
	fp->s = 0;
	fp->fail = 1;
	}
}

static void appendcOFile(OFile *fp, char c)
{
    if (c == '\n') {
	/* write out as <CR><LF> */
	appendcOFile_(fp,0xd);
	appendcOFile_(fp,0xa);
	}
    else
	appendcOFile_(fp,c);
}

static void appendsOFile(OFile *fp, const char *s)
{
    int i, slen;
    slen  = strlen(s);
    for (i=0; i<slen; i++) {
	appendcOFile(fp,s[i]);
	}
}

#endif

static void initOFile(OFile *fp, FILE *ofp)
{
    fp->fp = ofp;
    fp->s = 0;
    fp->len = 0;
    fp->limit = 0;
    fp->alloc = 0;
    fp->fail = 0;
}

static void initMemOFile(OFile *fp, char *s, int len)
{
    fp->fp = 0;
    fp->s = s;
    fp->len = 0;
    fp->limit = s?len:0;
    fp->alloc = s?0:1;
    fp->fail = 0;
}


static int writeBase64(OFile *fp, unsigned char *s, long len)
{
    long cur = 0;
    int i, numQuads = 0;
    unsigned long trip;
    unsigned char b;
    char quad[5];
#define MAXTQUADS 16

    quad[4] = 0;

    while (cur < len) {
	/* collect the triplet of bytes into 'trip' */
	trip = 0;
	for (i = 0; i < 3; i++) {
	    b = (cur < len) ? *(s + cur) : 0;
	    cur++;
	    trip = trip << 8 | b;
	    }
	/* fill in 'quad' with the appropriate four characters */
	for (i = 3; i >= 0; i--) {
	    b = (unsigned char)(trip & 0x3F);
	    trip = trip >> 6;
	    if ((3 - i) < (cur - len))
		quad[i] = '='; /* pad char */
	    else if (b < 26) quad[i] = (char)b + 'A';
	    else if (b < 52) quad[i] = (char)(b - 26) + 'a';
	    else if (b < 62) quad[i] = (char)(b - 52) + '0';
	    else if (b == 62) quad[i] = '+';
	    else quad[i] = '/';
	    }
	/* now output 'quad' with appropriate whitespace and line ending */
	appendsOFile(fp, (numQuads == 0 ? "    " : ""));
	appendsOFile(fp, quad);
	appendsOFile(fp, ((cur >= len)?"\n" :(numQuads==MAXTQUADS-1?"\n" : "")));
	numQuads = (numQuads + 1) % MAXTQUADS;
	}
    appendcOFile(fp,'\n');

    return 1;
}

/* this function really sucks.  Too basic. */
static void writeTQPString(OFile *fp, const char *s, int qp)
{
    const char *p = s;
    while (*p) {
      if (*p == '\n') {
	if (p[1]) appendsOFile(fp,"=0A=");
      }
      if (*p == '=' && qp)
	appendsOFile(fp,"=3D");
      else
	appendcOFile(fp,*p);
      p++;
    }
}

static void writeVObject_(OFile *fp, VObject *o);

static void writeValue(OFile *fp, VObject *o, unsigned long size)
{
    if (o == 0) return;
    switch (VALUE_TYPE(o)) {
	case VCVT_USTRINGZ: {
	    char *s = fakeCString(USTRINGZ_VALUE_OF(o));
	    if (isAPropertyOf(o, VCQuotedPrintableProp))
	      writeTQPString(fp, s, 1);
	    else
	      writeTQPString(fp, s, 0);
	    deleteStr(s);
	    break;
	    }
	case VCVT_STRINGZ: {
	    if (isAPropertyOf(o, VCQuotedPrintableProp))
	      writeTQPString(fp, STRINGZ_VALUE_OF(o), 1);
	    else
	      writeTQPString(fp, STRINGZ_VALUE_OF(o), 0);
	    break;
	    }
	case VCVT_UINT: {
	    char buf[16];
	    snprintf(buf,sizeof(buf),"%u", INTEGER_VALUE_OF(o));
	    appendsOFile(fp,buf);
	    break;
	    }
	case VCVT_ULONG: {
	    char buf[16];
	    snprintf(buf,sizeof(buf),"%lu", LONG_VALUE_OF(o));
	    appendsOFile(fp,buf);
	    break;
	    }
	case VCVT_RAW: {
	    appendcOFile(fp,'\n');
	    writeBase64(fp,(unsigned char*)(ANY_VALUE_OF(o)),size);
	    break;
	    }
	case VCVT_VOBJECT:
	    appendcOFile(fp,'\n');
	    writeVObject_(fp,VOBJECT_VALUE_OF(o));
	    break;
	}
}

static void writeAttrValue(OFile *fp, VObject *o)
{
    if (NAME_OF(o)) {
	struct PreDefProp *pi;
	pi = lookupPropInfo(NAME_OF(o));
	if (pi && ((pi->flags & PD_INTERNAL) != 0)) return;
	appendcOFile(fp,';');
	appendsOFile(fp,NAME_OF(o));
	}
    else
	appendcOFile(fp,';');
    if (VALUE_TYPE(o)) {
	appendcOFile(fp,'=');
	writeValue(fp,o,0);
	}
}

static void writeGroup(OFile *fp, VObject *o)
{
    char buf1[256];
    char buf2[256];
    strcpy(buf1,NAME_OF(o));
    while ((o=isAPropertyOf(o,VCGroupingProp)) != 0) {
	strncpy(buf2,STRINGZ_VALUE_OF(o),sizeof(buf2));
	buf2[sizeof(buf2)-1] = '\0';
	strncat(buf2,".",sizeof(buf2)-strlen(buf2)-1);
	strncat(buf2,buf1,sizeof(buf2)-strlen(buf2)-1);
	strcpy(buf1,buf2);
	}
    appendsOFile(fp,buf1);
}

static int inList(const char **list, const char *s)
{
    if (list == 0) return 0;
    while (*list) {
	if (strcasecmp(*list,s) == 0) return 1;
	list++;
	}
    return 0;
}

static void writeProp(OFile *fp, VObject *o)
{
    if (NAME_OF(o)) {
	struct PreDefProp *pi;
	VObjectIterator t;
	const char **fields_ = 0;
	pi = lookupPropInfo(NAME_OF(o));
	if (pi && ((pi->flags & PD_BEGIN) != 0)) {
	    writeVObject_(fp,o);
	    return;
	    }
	if (isAPropertyOf(o,VCGroupingProp))
	    writeGroup(fp,o);
	else
	    appendsOFile(fp,NAME_OF(o));
	if (pi) fields_ = pi->fields;
	initPropIterator(&t,o);
	while (moreIteration(&t)) {
	    const char *s;
	    VObject *eachProp = nextVObject(&t);
	    s = NAME_OF(eachProp);
	    if (strcasecmp(VCGroupingProp,s) && !inList(fields_,s))
		writeAttrValue(fp,eachProp);
	    }
	if (fields_) {
	    int i = 0, n = 0;
	    const char** fields = fields_;
	    /* output prop as fields */
	    appendcOFile(fp,':');
	    while (*fields) {
		VObject *tl = isAPropertyOf(o,*fields);
		i++;
		if (tl) n = i;
		fields++;
		}
	    fields = fields_;
	    for (i=0;i<n;i++) {
		writeValue(fp,isAPropertyOf(o,*fields),0);
		fields++;
		if (i<(n-1)) appendcOFile(fp,';');
		}
	    }
	}
	
    if (VALUE_TYPE(o)) {
	unsigned long size = 0;
        VObject *p = isAPropertyOf(o,VCDataSizeProp);
	if (p) size = LONG_VALUE_OF(p);
	appendcOFile(fp,':');
	writeValue(fp,o,size);
	}

    appendcOFile(fp,'\n');
}

static void writeVObject_(OFile *fp, VObject *o)
{
    if (NAME_OF(o)) {
	struct PreDefProp *pi;
	pi = lookupPropInfo(NAME_OF(o));

	if (pi && ((pi->flags & PD_BEGIN) != 0)) {
	    VObjectIterator t;
	    const char *begin = NAME_OF(o);
	    appendsOFile(fp,"BEGIN:");
	    appendsOFile(fp,begin);
	    appendcOFile(fp,'\n');
	    initPropIterator(&t,o);
	    while (moreIteration(&t)) {
		VObject *eachProp = nextVObject(&t);
		writeProp(fp, eachProp);
		}
	    appendsOFile(fp,"END:");
	    appendsOFile(fp,begin);
	    appendsOFile(fp,"\n\n");
	    }
	}
}

void writeVObject(FILE *fp, VObject *o)
{
    OFile ofp;
    initOFile(&ofp,fp);
    writeVObject_(&ofp,o);
}

void writeVObjectToFile(char *fname, VObject *o)
{
    FILE *fp = fopen(fname,"w");
    if (fp) {
	writeVObject(fp,o);
	fclose(fp);
	}
}

void writeVObjectsToFile(char *fname, VObject *list)
{
    FILE *fp = fopen(fname,"w");
    if (fp) {
	while (list) {
	    writeVObject(fp,list);
	    list = nextVObjectInList(list);
	    }
	fclose(fp);
	}
}

char* writeMemVObject(char *s, int *len, VObject *o)
{
    OFile ofp;
    initMemOFile(&ofp,s,len?*len:0);
    writeVObject_(&ofp,o);
    if (len) *len = ofp.len;
    appendcOFile(&ofp,0);
    return ofp.s;
}

char* writeMemVObjects(char *s, int *len, VObject *list)
{
    OFile ofp;
    initMemOFile(&ofp,s,len?*len:0);
    while (list) {
	writeVObject_(&ofp,list);
	list = nextVObjectInList(list);
	}
    if (len) *len = ofp.len;
    appendcOFile(&ofp,0);
    return ofp.s;
}

/*----------------------------------------------------------------------
  APIs to do fake Unicode stuff.
  ----------------------------------------------------------------------*/
wchar_t* fakeUnicode(const char *ps, int *bytes)
{
    wchar_t *r, *pw;
    int len = strlen(ps)+1;

    pw = r = (wchar_t*)malloc(sizeof(wchar_t)*len);
    if (bytes)
	*bytes = len * sizeof(wchar_t);

    while (*ps) { 
	if (*ps == '\n')
	    *pw = (wchar_t)0x2028;
	else if (*ps == '\r')
	    *pw = (wchar_t)0x2029;
	else
	    *pw = (wchar_t)(unsigned char)*ps;
	ps++; pw++;
	}				 
    *pw = (wchar_t)0;
	
    return r;
}

int uStrLen(const wchar_t *u)
{
    int i = 0;
    while (*u != (wchar_t)0) { u++; i++; }
    return i;
}

char* fakeCString(const wchar_t *u)
{
    char *s, *t;
    int len = uStrLen(u) + 1;
    t = s = (char*)malloc(len+1);
    while (*u) {
	if (*u == (wchar_t)0x2028)
	    *t = '\n';
	else if (*u == (wchar_t)0x2029)
	    *t = '\r';
	else
	    *t = (char)*u;
	u++; t++;
	}
    *t = 0;
    return s;
}

/* end of source file vobject.c */