vobject.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.7平台上编译为嵌入式图形界面操作系统。

/***************************************************************************
(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.                             
                                                                               
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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,              
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PURPOSE.                                                                       

The software is provided with RESTRICTED RIGHTS.  Use, duplication, or         
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***************************************************************************/

/*
 * 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 <qtopia/config.h>
#include "vobject_p.h"
#include "qfiledirect_p.h"
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
//#include <io.h>


#define NAME_OF(o)				o->id
#define VALUE_TYPE(o)			o->valType
#define STRINGZ_VALUE_OF(o)		o->val.strs
#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

static char vobj_cs[10];
static enum { EightBit, QuotedPrintable, Base64 } vobj_enc=EightBit;
static const char *vobj_enc_s=0;

typedef union ValueItem {
    const char *strs;
    unsigned int i;
    unsigned long l;
    void *any;
    VObject *vobj;
    } ValueItem;

struct VObject {
    VObject *next;
    const char *id;
    VObject *prop;
    unsigned short valType;
    ValueItem val;
    };

typedef struct StrItem StrItem;

struct StrItem {
    StrItem *next;
    const char *s;
    unsigned int refCnt;
    };

DLLEXPORT(const char**) fieldedProp;



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

DLLEXPORT(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;
}

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

DLLEXPORT(void) deleteVObject(VObject *p)
{
    unUseStr(p->id);
    free(p);
}

DLLEXPORT(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;
	}
}

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


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)
{
    free((void*)p);
}


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

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

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

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

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

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

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

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

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

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

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

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

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

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

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


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

DLLEXPORT(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;
}

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

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

DLLEXPORT(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;
	}
}

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

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

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

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

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

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

DLLEXPORT(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;
}

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

DLLEXPORT(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));
}

DLLEXPORT(VObject*) addPropValue(VObject *o, const char *p, const char *v)
{
    VObject *prop;
    prop = addProp(o,p);
    setVObjectStringZValue_(prop, strdup( v ) );
    return prop;
}

DLLEXPORT(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;
}

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


DLLEXPORT(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;