source: downloads/Tools/VRMLConverter/vrmllib/src/file.cpp @ 6

#include <vrmllib/file.h>

#include <stdexcept>
#include <stack>
#include <algorithm>

#include <vrmllib/nodes.h>
#include "commentstream.h"

namespace vrmllib {
namespace {

void set_parent(std::vector<node *> &c, grouping_node *p)
{
        for (std::vector<node *>::iterator i=c.begin(); i!=c.end(); ++i) {
                if (!*i)
                        continue;
                (*i)->parent = p;
                if (grouping_node *n = dynamic_cast<grouping_node *>(*i))
                        set_parent(n->children, n);
        }
}

} // anonymous namespace

file::file(std::istream &sarg)
{
        utillib::commentstream s(sarg, '#', '\n');
        std::ios::iostate exceptions = sarg.exceptions();
        sarg.exceptions(std::ios::goodbit);

        try {
                for (;;) {
                        char t;
                        s >> t;
                        if (s)
                                s.putback(t);
                        else if (s.eof())
                                break;
                        else
                                throw std::runtime_error(
                                        "parse error: unexpected end of file");

                        s.exceptions(std::ios::badbit
                                | std::ios::failbit
                                | std::ios::eofbit);

                        std::string word;
                        s >> word;

                        if (word == "ROUTE") {
                                s >> word;
                                s >> word; // TO
                                s >> word;
                        } else {
                                node *n = node::parse_node_xdef(s, *this, word);
                                if (n)
                                        roots.push_back(n);
                        }
                        
                        s.exceptions(std::ios::goodbit);
                }

        } catch (std::ios::failure &e) {
                sarg.exceptions(exceptions);
                throw std::runtime_error(std::string("parse error: stream failure: ") + e.what());
        } catch (...) {
                sarg.exceptions(exceptions);
                throw;
        }
        sarg.exceptions(exceptions);

        set_parent(roots, 0);
}

namespace {
        inline void delnode(node *n) { delete n; }
}

file::~file()
{
        std::for_each(nodes.begin(), nodes.end(), delnode);
}

} // namespace vrmllib