#include <string.h>

#ifdef FOR_LT

#include "lt-memory.h"
#include "nsllib.h"

#define Malloc salloc
#define Realloc srealloc
#define Free sfree

#else

#include "system.h"

#endif

#include "charset.h"
#include "string16.h"
#include "namespaces.h"
#include "rxputil.h"

static void FreeNamespace(Namespace ns);
static void FreeNSElementDefinition(NSElementDefinition element);
static void FreeNSAttributeDefinition(NSAttributeDefinition attribute);

NamespaceUniverse global_universe = 0;

int init_namespaces(void)
{
    if(global_universe)
	return 0;

    if(!(global_universe = NewNamespaceUniverse()))
	return -1;

    return 0;
}

void deinit_namespaces(void)
{
    if(global_universe)
	FreeNamespaceUniverse(global_universe);
    global_universe = 0;
}

int reinit_namespaces(void)
{
    deinit_namespaces();
    return init_namespaces();
}

NamespaceUniverse NewNamespaceUniverse(void)
{
    NamespaceUniverse u;

    if(!(u = Malloc(sizeof(*global_universe))))
	return 0;
    VectorInit(u->namespaces);

    return u;
}

void FreeNamespaceUniverse(NamespaceUniverse universe)
{
    int i;

    if(!universe)
	universe = global_universe;

    for(i=VectorCount(universe->namespaces)-1; i>=0; --i)
	FreeNamespace(universe->namespaces[i]);

    Free(universe->namespaces);
    Free(universe);
}

Namespace NewNamespace(NamespaceUniverse universe, const char8 *uri)
{
    Namespace ns;

    if(!universe)
	universe = global_universe;

    if(!(ns = Malloc(sizeof(*ns))))
	return 0;
    if(!(ns->uri = strdup8(uri)))
	return 0;
    ns->nsnum = VectorCount(universe->namespaces);
    if(!VectorPush(universe->namespaces, ns))
	return 0;
    ns->universe = universe;
    VectorInit(ns->elements);
    VectorInit(ns->attributes);

    return ns;
}

static void FreeNamespace(Namespace ns)
{
    int i;

    for(i=VectorCount(ns->elements)-1; i>=0; --i)
	FreeNSElementDefinition(ns->elements[i]);

    for(i=VectorCount(ns->attributes)-1; i>=0; --i)
	FreeNSAttributeDefinition(ns->attributes[i]);

    Free(ns->uri);
    Free(ns->elements);
    Free(ns->attributes);
    Free(ns);
}

NSElementDefinition DefineNSElement(Namespace ns, const Char *name)
{
    NSElementDefinition e;

    if(!(e = Malloc(sizeof(*e))))
	return 0;
    if(!(e->name = Strdup(name)))
	return 0;
    e->eltnum = VectorCount(ns->elements);
    if(!VectorPush(ns->elements, e))
	return 0;
    e->namespace = ns;
    VectorInit(e->attributes);
    
    return e;
}

static void FreeNSElementDefinition(NSElementDefinition element)
{
    int i;


    for(i=VectorCount(element->attributes)-1; i>=0; --i)
	FreeNSAttributeDefinition(element->attributes[i]);

    Free(element->attributes);
    Free((Char *)element->name); /* cast to get rid of const */
    Free(element);
}

NSAttributeDefinition 
    DefineNSGlobalAttribute(Namespace ns, const Char *name)
{
    NSAttributeDefinition a;

    if(!(a = Malloc(sizeof(*a))))
	return 0;
    if(!(a->name = Strdup(name)))
	return 0;
    a->attrnum = VectorCount(ns->attributes);
    if(!VectorPush(ns->attributes, a))
	return 0;
    a->namespace = ns;
    a->element = 0;
    
    return a;
}

NSAttributeDefinition
     DefineNSElementAttribute(NSElementDefinition element, const Char *name)
{
    NSAttributeDefinition a;
    Namespace ns = element->namespace;

    if(!(a = Malloc(sizeof(*a))))
	return 0;
    if(!(a->name = Strdup(name)))
	return 0;
    a->attrnum = VectorCount(element->attributes);
    if(!VectorPush(element->attributes, a))
	return 0;
    a->namespace = ns;
    a->element = element;
    
    return a;
}

static void FreeNSAttributeDefinition(NSAttributeDefinition attribute)
{
    Free((Char *)attribute->name); /* cast to get rid of const */
    Free(attribute);
}

Namespace
    FindNamespace(NamespaceUniverse universe, const char8 *uri, int create)
{
    int i;

    if(!universe)
	universe = global_universe;

    for(i=VectorCount(universe->namespaces)-1; i>=0; --i)
	if(strcmp8(uri, universe->namespaces[i]->uri) == 0)
	    return universe->namespaces[i];

    if(create)
	return NewNamespace(universe, uri);

    return 0;
}

NSElementDefinition
    FindNSElementDefinition(Namespace ns, const Char *name, int create)
{
    int i;

    for(i=VectorCount(ns->elements)-1; i>=0; --i)
	if(Strcmp(name, ns->elements[i]->name) == 0)
	    return ns->elements[i];

    if(create)
	return DefineNSElement(ns, name);

    return 0;
}

NSAttributeDefinition
    FindNSGlobalAttributeDefinition(Namespace ns, const Char *name, int create)
{
    int i;

    for(i=VectorCount(ns->attributes)-1; i>=0; --i)
	if(Strcmp(name, ns->attributes[i]->name) == 0)
	    return ns->attributes[i];

    if(create)
	return DefineNSGlobalAttribute(ns, name);

    return 0;
}

NSAttributeDefinition
    FindNSElementAttributeDefinition(NSElementDefinition element,
				     const Char *name, int create)
{
    int i;

    for(i=VectorCount(element->attributes)-1; i>=0; --i)
	if(Strcmp(name, element->attributes[i]->name) == 0)
	    return element->attributes[i];

    if(create)
	return DefineNSElementAttribute(element, name);

    return 0;
}

Namespace 
    NextNamespace(NamespaceUniverse universe, Namespace previous)
{
    int next;
    
    if(!universe)
	universe = global_universe;
    next = previous ? previous->nsnum + 1 : 0;
    return next < VectorCount(universe->namespaces) ?
	        universe->namespaces[next] : 0;
}

NSElementDefinition
    NextNSElementDefinition(Namespace ns, NSElementDefinition previous)
{
    int next = previous ? previous->eltnum + 1: 0;
    
    return next < VectorCount(ns->elements) ? ns->elements[next] : 0;
}

NSAttributeDefinition
    NextNSGlobalAttributeDefinition(Namespace ns, 
				    NSAttributeDefinition previous)
{
    int next = previous ? previous->attrnum + 1: 0;
    
    return next < VectorCount(ns->attributes) ? ns->attributes[next] : 0;
}

NSAttributeDefinition
    NextNSElementAttributeDefinition(NSElementDefinition element,
				     NSAttributeDefinition previous)
{
    int next = previous ? previous->attrnum + 1: 0;
    
    return next < VectorCount(element->attributes) ? element->attributes[next] : 0;
}