godot/core/packed_data_container.cpp

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2014-02-10 09:10:30 +08:00
/*************************************************************************/
/* packed_data_container.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
2015-04-19 01:38:54 +08:00
/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur. */
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/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "packed_data_container.h"
#include "io/marshalls.h"
#include "core_string_names.h"
Variant PackedDataContainer::getvar(const Variant& p_key, bool *r_valid) const {
bool err=false;
Variant ret = _key_at_ofs(0,p_key,err);
if (r_valid)
*r_valid=!err;
return ret;
}
int PackedDataContainer::size() const {
return _size(0);
};
Variant PackedDataContainer::_iter_init_ofs(const Array& p_iter,uint32_t p_offset) {
Array ref=p_iter;
uint32_t size = _size(p_offset);
if (size==0 || ref.size()!=1)
return false;
else {
ref[0]=0;
return true;
}
}
Variant PackedDataContainer::_iter_next_ofs(const Array& p_iter,uint32_t p_offset){
Array ref=p_iter;
uint32_t size = _size(p_offset);
if (ref.size()!=1)
return false;
int pos = ref[0];
if (pos<0 || pos>=size)
return false;
pos+=1;
ref[0]=pos;
return pos!=size;
}
Variant PackedDataContainer::_iter_get_ofs(const Variant& p_iter,uint32_t p_offset){
uint32_t size = _size(p_offset);
int pos=p_iter;
if (pos<0 || pos>=size)
return Variant();
DVector<uint8_t>::Read rd=data.read();
const uint8_t *r=&rd[p_offset];
uint32_t type = decode_uint32(r);
bool err=false;
if (type==TYPE_ARRAY) {
uint32_t vpos = decode_uint32(rd.ptr() + p_offset+8+pos*4);
return _get_at_ofs(vpos,rd.ptr(),err);
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} else if (type==TYPE_DICT) {
uint32_t vpos = decode_uint32(rd.ptr() + p_offset+8+pos*12+4);
return _get_at_ofs(vpos,rd.ptr(),err);
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} else {
ERR_FAIL_V(Variant());
}
}
Variant PackedDataContainer::_get_at_ofs(uint32_t p_ofs,const uint8_t *p_buf,bool &err) const {
uint32_t type = decode_uint32(p_buf + p_ofs);
if (type==TYPE_ARRAY || type==TYPE_DICT) {
Ref<PackedDataContainerRef> pdcr = memnew( PackedDataContainerRef );
Ref<PackedDataContainer> pdc = Ref<PackedDataContainer>((PackedDataContainer*)this);
pdcr->from=pdc;
pdcr->offset=p_ofs;
return pdcr;
} else {
Variant v;
Error rerr = decode_variant(v,p_buf + p_ofs,datalen-p_ofs,NULL);
if (rerr!=OK) {
err=true;
ERR_FAIL_COND_V(err!=OK,Variant());
}
return v;
}
}
uint32_t PackedDataContainer::_type_at_ofs(uint32_t p_ofs) const {
DVector<uint8_t>::Read rd=data.read();
const uint8_t *r=&rd[p_ofs];
uint32_t type = decode_uint32(r);
return type;
};
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int PackedDataContainer::_size(uint32_t p_ofs) const {
DVector<uint8_t>::Read rd=data.read();
const uint8_t *r=&rd[p_ofs];
uint32_t type = decode_uint32(r);
if (type==TYPE_ARRAY) {
uint32_t len = decode_uint32(r+4);
return len;
} else if (type==TYPE_DICT) {
uint32_t len = decode_uint32(r+4);
return len;
};
return -1;
};
Variant PackedDataContainer::_key_at_ofs(uint32_t p_ofs,const Variant& p_key,bool &err) const {
DVector<uint8_t>::Read rd=data.read();
const uint8_t *r=&rd[p_ofs];
uint32_t type = decode_uint32(r);
if (type==TYPE_ARRAY) {
if (p_key.is_num()) {
int idx=p_key;
uint32_t len = decode_uint32(r+4);
if (idx<0 || idx>=len) {
err=true;
return Variant();
}
uint32_t ofs = decode_uint32(r+8+4*idx);
return _get_at_ofs(ofs,rd.ptr(),err);
} else {
err=true;
return Variant();
}
} else if (type==TYPE_DICT) {
uint32_t hash=p_key.hash();
uint32_t len = decode_uint32(r+4);
bool found=false;
for(int i=0;i<len;i++) {
uint32_t khash=decode_uint32(r+8+i*12+0);
if (khash==hash) {
Variant key = _get_at_ofs(decode_uint32(r+8+i*12+4),rd.ptr(),err);
if (err)
return Variant();
if (key==p_key) {
//key matches, return value
return _get_at_ofs(decode_uint32(r+8+i*12+8),rd.ptr(),err);
}
found=true;
} else {
if (found)
break;
}
}
err=true;
return Variant();
} else {
err=true;
return Variant();
}
}
uint32_t PackedDataContainer::_pack(const Variant& p_data, Vector<uint8_t>& tmpdata, Map<String,uint32_t>& string_cache) {
switch(p_data.get_type()) {
case Variant::STRING: {
String s = p_data;
if (string_cache.has(s)) {
return string_cache[s];
}
string_cache[s]=tmpdata.size();
}; //fallthrough
case Variant::NIL:
case Variant::BOOL:
case Variant::INT:
case Variant::REAL:
case Variant::VECTOR2:
case Variant::RECT2:
case Variant::VECTOR3:
case Variant::MATRIX32:
case Variant::PLANE:
case Variant::QUAT:
case Variant::_AABB:
case Variant::MATRIX3:
case Variant::TRANSFORM:
case Variant::IMAGE:
case Variant::INPUT_EVENT:
case Variant::RAW_ARRAY:
case Variant::INT_ARRAY:
case Variant::REAL_ARRAY:
case Variant::STRING_ARRAY:
case Variant::VECTOR2_ARRAY:
case Variant::VECTOR3_ARRAY:
case Variant::COLOR_ARRAY:
case Variant::NODE_PATH: {
uint32_t pos = tmpdata.size();
int len;
encode_variant(p_data,NULL,len);
tmpdata.resize(tmpdata.size()+len);
encode_variant(p_data,&tmpdata[pos],len);
return pos;
} break;
// misc types
case Variant::_RID:
case Variant::OBJECT: {
return _pack(Variant(),tmpdata,string_cache);
} break;
case Variant::DICTIONARY: {
Dictionary d=p_data;
//size is known, use sort
uint32_t pos = tmpdata.size();
int len=d.size();
tmpdata.resize(tmpdata.size()+len*12+8);
encode_uint32(TYPE_DICT,&tmpdata[pos+0]);
encode_uint32(len,&tmpdata[pos+4]);
List<Variant> keys;
d.get_key_list(&keys);
List<DictKey> sortk;
for(List<Variant>::Element *E=keys.front();E;E=E->next()) {
DictKey dk;
dk.hash=E->get().hash();
dk.key=E->get();
sortk.push_back(dk);
}
sortk.sort();
int idx=0;
for(List<DictKey>::Element *E=sortk.front();E;E=E->next()) {
encode_uint32(E->get().hash,&tmpdata[pos+8+idx*12+0]);
uint32_t ofs = _pack(E->get().key,tmpdata,string_cache);
encode_uint32(ofs,&tmpdata[pos+8+idx*12+4]);
ofs = _pack(d[E->get().key],tmpdata,string_cache);
encode_uint32(ofs,&tmpdata[pos+8+idx*12+8]);
idx++;
}
return pos;
} break;
case Variant::ARRAY: {
Array a=p_data;
//size is known, use sort
uint32_t pos = tmpdata.size();
int len=a.size();
tmpdata.resize(tmpdata.size()+len*4+8);
encode_uint32(TYPE_ARRAY,&tmpdata[pos+0]);
encode_uint32(len,&tmpdata[pos+4]);
for(int i=0;i<len;i++) {
uint32_t ofs = _pack(a[i],tmpdata,string_cache);
encode_uint32(ofs,&tmpdata[pos+8+i*4]);
}
return pos;
} break;
default: {}
}
return OK;
}
Error PackedDataContainer::pack(const Variant& p_data) {
Vector<uint8_t> tmpdata;
Map<String,uint32_t> string_cache;
_pack(p_data,tmpdata,string_cache);
datalen=tmpdata.size();
data.resize(tmpdata.size());
DVector<uint8_t>::Write w = data.write();
copymem(w.ptr(),tmpdata.ptr(),tmpdata.size());
return OK;
}
void PackedDataContainer::_set_data(const DVector<uint8_t>& p_data) {
data=p_data;
datalen=data.size();
}
DVector<uint8_t> PackedDataContainer::_get_data() const {
return data;
}
Variant PackedDataContainer::_iter_init(const Array& p_iter) {
return _iter_init_ofs(p_iter,0);
}
Variant PackedDataContainer::_iter_next(const Array& p_iter){
return _iter_next_ofs(p_iter,0);
}
Variant PackedDataContainer::_iter_get(const Variant& p_iter){
return _iter_get_ofs(p_iter,0);
}
void PackedDataContainer::_bind_methods() {
ObjectTypeDB::bind_method(_MD("_set_data"),&PackedDataContainer::_set_data);
ObjectTypeDB::bind_method(_MD("_get_data"),&PackedDataContainer::_get_data);
ObjectTypeDB::bind_method(_MD("_iter_init"),&PackedDataContainer::_iter_init);
ObjectTypeDB::bind_method(_MD("_iter_get"),&PackedDataContainer::_iter_get);
ObjectTypeDB::bind_method(_MD("_iter_next"),&PackedDataContainer::_iter_next);
ObjectTypeDB::bind_method(_MD("pack:Error","value"),&PackedDataContainer::pack);
ObjectTypeDB::bind_method(_MD("size"),&PackedDataContainer::size);
ADD_PROPERTY( PropertyInfo(Variant::RAW_ARRAY,"__data__"),_SCS("_set_data"),_SCS("_get_data"));
}
PackedDataContainer::PackedDataContainer() {
datalen=0;
}
//////////////////
Variant PackedDataContainerRef::_iter_init(const Array& p_iter) {
return from->_iter_init_ofs(p_iter,offset);
}
Variant PackedDataContainerRef::_iter_next(const Array& p_iter){
return from->_iter_next_ofs(p_iter,offset);
}
Variant PackedDataContainerRef::_iter_get(const Variant& p_iter){
return from->_iter_get_ofs(p_iter,offset);
}
bool PackedDataContainerRef::_is_dictionary() const {
return from->_type_at_ofs(offset) == PackedDataContainer::TYPE_DICT;
};
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void PackedDataContainerRef::_bind_methods() {
ObjectTypeDB::bind_method(_MD("size"),&PackedDataContainerRef::size);
ObjectTypeDB::bind_method(_MD("_iter_init"),&PackedDataContainerRef::_iter_init);
ObjectTypeDB::bind_method(_MD("_iter_get"),&PackedDataContainerRef::_iter_get);
ObjectTypeDB::bind_method(_MD("_iter_next"),&PackedDataContainerRef::_iter_next);
ObjectTypeDB::bind_method(_MD("_is_dictionary"),&PackedDataContainerRef::_is_dictionary);
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}
Variant PackedDataContainerRef::getvar(const Variant& p_key, bool *r_valid) const {
bool err=false;
Variant ret = from->_key_at_ofs(offset,p_key,err);
if (r_valid)
*r_valid=!err;
return ret;
}
int PackedDataContainerRef::size() const {
return from->_size(offset);
};
PackedDataContainerRef::PackedDataContainerRef() {
}