dust3d/thirdparty/carve-1.4.0/external/GLOOP/include/gloop/model/stream.hpp

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// Copyright (c) 2006, Tobias Sargeant
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the
// distribution. The names of its contributors may be used to endorse
// or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
// OF THE POSSIBILITY OF SUCH DAMAGE.
#pragma once
#include <gloop/exceptions.hpp>
#include <gloop/ref.hpp>
#ifdef WIN32
typedef char int8_t;
typedef short int16_t;
typedef long int32_t;
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned long uint32_t;
#else
#include <stdint.h>
#endif
#include <stdlib.h>
#include <string>
#include <list>
#include <vector>
namespace gloop {
namespace stream {
enum Type {
I8 = 0x00,
U8 = 0x01,
I16 = 0x02,
U16 = 0x03,
I32 = 0x04,
U32 = 0x05,
F32 = 0x06,
F64 = 0x07
};
static inline Type smallest_type(int32_t min, int32_t max) {
if (max < 0x80 && min >= -0x80) return I8;
if (max < 0x8000 && min >= -0x8000) return I16;
return I32;
}
static inline Type smallest_type(uint32_t max) {
if (max < 0x100) return U8;
if (max < 0x10000) return U16;
return U32;
}
static inline int type_size(int type) {
switch (type) {
case I8: case U8: return 1;
case I16: case U16: return 2;
case I32: case U32: case F32: return 4;
case F64: return 8;
default: throw gloop::exception("unknown type");
}
}
struct reader_base : public virtual RefObj {
virtual void _val(int8_t t) =0;
virtual void _val(uint8_t t) =0;
virtual void _val(int16_t t) =0;
virtual void _val(uint16_t t) =0;
virtual void _val(int32_t t) =0;
virtual void _val(uint32_t t) =0;
virtual void _val(float t) =0;
virtual void _val(double t) =0;
virtual void begin() { }
virtual void next() { }
virtual void fail() { }
virtual void end() { }
virtual void length(int l) { }
};
struct null_reader : public reader_base {
virtual void _val(int8_t t) { }
virtual void _val(uint8_t t) { }
virtual void _val(int16_t t) { }
virtual void _val(uint16_t t) { }
virtual void _val(int32_t t) { }
virtual void _val(uint32_t t) { }
virtual void _val(float t) { }
virtual void _val(double t) { }
};
template<typename T>
struct reader : public reader_base {
virtual void value(T val) =0;
virtual void _val(int8_t t) { value((T)t); }
virtual void _val(uint8_t t) { value((T)t); }
virtual void _val(int16_t t) { value((T)t); }
virtual void _val(uint16_t t) { value((T)t); }
virtual void _val(int32_t t) { value((T)t); }
virtual void _val(uint32_t t) { value((T)t); }
virtual void _val(float t) { value((T)t); }
virtual void _val(double t) { value((T)t); }
};
template<typename T>
void send_scalar(reader_base *rd, const T &v) {
if (rd) {
rd->begin();
rd->length(1);
rd->next();
rd->_val(v);
rd->end();
}
}
template<typename iter_t>
void send_sequence(reader_base *rd, size_t n, iter_t begin, iter_t end) {
if (rd) {
rd->begin();
rd->length(n);
while (begin != end) {
rd->next();
rd->_val(*begin++);
}
rd->end();
}
}
struct writer_base : public virtual RefObj {
virtual void _val(int8_t &t) =0;
virtual void _val(uint8_t &t) =0;
virtual void _val(int16_t &t) =0;
virtual void _val(uint16_t &t) =0;
virtual void _val(int32_t &t) =0;
virtual void _val(uint32_t &t) =0;
virtual void _val(float &t) =0;
virtual void _val(double &t) =0;
virtual bool isList() { return false; }
virtual Type dataType() { return F64; }
virtual void begin() { }
virtual void next() { }
virtual void fail() { }
virtual void end() { }
virtual int length() { return 0; }
virtual int maxLength() { return 0; }
};
struct null_writer : public writer_base {
virtual void _val(int8_t &t) { }
virtual void _val(uint8_t &t) { }
virtual void _val(int16_t &t) { }
virtual void _val(uint16_t &t) { }
virtual void _val(int32_t &t) { }
virtual void _val(uint32_t &t) { }
virtual void _val(float &t) { }
virtual void _val(double &t) { }
};
template<typename T>
struct writer : public writer_base {
virtual T value() =0;
virtual void _val(int8_t &t) { t = (int8_t)value(); }
virtual void _val(uint8_t &t) { t = (uint8_t)value(); }
virtual void _val(int16_t &t) { t = (int16_t)value(); }
virtual void _val(uint16_t &t) { t = (uint16_t)value(); }
virtual void _val(int32_t &t) { t = (int32_t)value(); }
virtual void _val(uint32_t &t) { t = (uint32_t)value(); }
virtual void _val(float &t) { t = (float)value(); }
virtual void _val(double &t) { t = (double)value(); }
};
// a specification string has the form:
// block_type.element.property
// for example:
// polyhedron.face.vertex_indices
// for readers, the ordering of specifications is unimportant.
// for writers, within a block there should be a single block type.
// within that block, specifications should be ordered by order of
// addition of element and then by order of addition of property.
struct named_prop_t {
std::string name;
Ref<reader_base> rd;
Ref<writer_base> wt;
named_prop_t(const std::string &n) : name(n), rd(NULL), wt(NULL) {}
};
typedef std::list<named_prop_t> named_prop_list_t;
struct named_element_t {
std::string name;
named_prop_list_t props;
Ref<reader_base> rd;
Ref<writer_base> wt;
named_element_t(const std::string &n) : name(n), props(), rd(NULL), wt(NULL) {}
named_prop_t *findProp(const std::string &n) const;
named_prop_t &findOrCreateProp(const std::string &n);
};
typedef std::list<named_element_t> named_element_list_t;
struct block_t {
std::string name;
named_element_list_t elems;
Ref<reader_base> rd;
Ref<writer_base> wt;
block_t(const std::string &n) : name(n), elems(), rd(NULL), wt(NULL) {}
named_element_t *findElem(const std::string &n) const;
named_element_t &findOrCreateElem(const std::string &n);
};
typedef std::list<block_t> block_list_t;
class model_reader {
public:
block_list_t blocks;
block_t *findBlock(const std::string &n) const;
block_t &findOrCreateBlock(const std::string &n);
named_element_t *findElem(const std::string &b, const std::string &e) const;
named_element_t &findOrCreateElem(const std::string &b, const std::string &e);
named_prop_t *findProp(const std::string &b, const std::string &e, const std::string &p) const;
named_prop_t &findOrCreateProp(const std::string &b, const std::string &e, const std::string &p);
reader_base *findReader(const std::string &b, const std::string &e, const std::string &p) const {
named_prop_t *prop = findProp(b, e, p); if (prop) return prop->rd.ptr();
return NULL;
}
reader_base *findReader(const std::string &b, const std::string &e) const {
named_element_t *elem = findElem(b, e); if (elem) return elem->rd.ptr();
return NULL;
}
reader_base *findReader(const std::string &b) const {
block_t *blk = findBlock(b); if (blk) return blk->rd.ptr();
return NULL;
}
model_reader() {
}
virtual ~model_reader() {
}
bool addReader(const std::string &spec, reader_base *rd);
virtual bool read(std::istream &in) =0;
};
struct model_writer {
std::list<std::pair<std::string, block_t> > blocks;
public:
model_writer() {
}
virtual ~model_writer() {
}
bool newBlock(const std::string &name);
bool addWriter(const std::string &spec, writer_base *wt);
virtual bool write(std::ostream &out) =0;
};
}
}