3 * Archiving of GiNaC expressions. */
6 * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include "registrar.h"
32 #ifndef NO_NAMESPACE_GINAC
34 #endif // ndef NO_NAMESPACE_GINAC
37 /** Archive an expression.
38 * @param ex the expression to be archived
39 * @param name name under which the expression is stored */
40 void archive::archive_ex(const ex &e, const char *name)
42 // Create root node (which recursively archives the whole expression tree)
43 // and add it to the archive
44 archive_node_id id = add_node(archive_node(*this, e));
46 // Add root node ID to list of archived expressions
47 archived_ex ae = archived_ex(atomize(name), id);
52 /** Add archive_node to archive if the corresponding expression is
53 * not already archived.
54 * @return ID of archived node */
55 archive_node_id archive::add_node(const archive_node &n)
57 // Search for node in nodes vector
58 vector<archive_node>::const_iterator i = nodes.begin(), iend = nodes.end();
59 archive_node_id id = 0;
61 if (i->has_same_ex_as(n))
66 // Not found, add archive_node to nodes vector
72 /** Retrieve archive_node by ID. */
73 archive_node &archive::get_node(archive_node_id id)
75 if (id >= nodes.size())
76 throw (std::range_error("archive::get_node(): archive node ID out of range"));
82 /** Retrieve expression from archive by name.
83 * @param sym_lst list of pre-defined symbols */
84 ex archive::unarchive_ex(const lst &sym_lst, const char *name) const
87 string name_string = name;
88 archive_atom id = atomize(name_string);
89 vector<archived_ex>::const_iterator i = exprs.begin(), iend = exprs.end();
95 throw (std::logic_error("expression with name '" + name_string + "' not found in archive"));
98 // Recursively unarchive all nodes, starting at the root node
99 return nodes[i->root].unarchive(sym_lst);
102 /** Retrieve expression from archive by index.
103 * @param sym_lst list of pre-defined symbols */
104 ex archive::unarchive_ex(const lst &sym_lst, unsigned int index) const
106 if (index >= exprs.size())
107 throw (std::range_error("index of archived expression out of range"));
109 // Recursively unarchive all nodes, starting at the root node
110 return nodes[exprs[index].root].unarchive(sym_lst);
113 /** Retrieve expression and its name from archive by index.
114 * @param sym_lst list of pre-defined symbols */
115 ex archive::unarchive_ex(const lst &sym_lst, string &name, unsigned int index) const
117 if (index >= exprs.size())
118 throw (std::range_error("index of archived expression out of range"));
120 // Return expression name
121 name = unatomize(exprs[index].name);
123 // Recursively unarchive all nodes, starting at the root node
124 return nodes[exprs[index].root].unarchive(sym_lst);
128 /** Return number of archived expressions. */
129 unsigned int archive::num_expressions(void) const
136 * Archive file format
138 * - 4 bytes signature 'GARC'
139 * - unsigned version number
140 * - unsigned number of atoms
141 * - atom strings (each zero-terminated)
142 * - unsigned number of expressions
143 * - unsigned name atom
144 * - unsigned root node ID
145 * - unsigned number of nodes
146 * - unsigned number of properties
147 * - unsigned containing type (PTYPE_*) in its lower 3 bits and
148 * name atom in the upper bits
149 * - unsigned property value
151 * Unsigned quantities are stored in a compressed format:
152 * - numbers in the range 0x00..0x7f are stored verbatim (1 byte)
153 * - numbers larger than 0x7f are stored in 7-bit packets (1 byte per
154 * packet), starting with the LSBs; all bytes except the last one have
155 * their upper bit set
170 * 0x80 0x80 0x01 = 0x4000
174 /** Write unsigned integer quantity to stream. */
175 static void write_unsigned(ostream &os, unsigned int val)
178 os.put((val & 0x7f) | 0x80);
184 /** Read unsigned integer quantity from stream. */
185 static unsigned int read_unsigned(istream &is)
188 unsigned int ret = 0;
189 unsigned int shift = 0;
192 ret |= (b & 0x7f) << shift;
198 /** Write archive_node to binary data stream. */
199 ostream &operator<<(ostream &os, const archive_node &n)
202 unsigned int num_props = n.props.size();
203 write_unsigned(os, num_props);
204 for (unsigned int i=0; i<num_props; i++) {
205 write_unsigned(os, n.props[i].type | (n.props[i].name << 3));
206 write_unsigned(os, n.props[i].value);
211 /** Write archive to binary data stream. */
212 ostream &operator<<(ostream &os, const archive &ar)
215 os.put('G'); // Signature
219 write_unsigned(os, ARCHIVE_VERSION);
222 unsigned int num_atoms = ar.atoms.size();
223 write_unsigned(os, num_atoms);
224 for (unsigned int i=0; i<num_atoms; i++)
225 os << ar.atoms[i] << ends;
228 unsigned int num_exprs = ar.exprs.size();
229 write_unsigned(os, num_exprs);
230 for (unsigned int i=0; i<num_exprs; i++) {
231 write_unsigned(os, ar.exprs[i].name);
232 write_unsigned(os, ar.exprs[i].root);
236 unsigned int num_nodes = ar.nodes.size();
237 write_unsigned(os, num_nodes);
238 for (unsigned int i=0; i<num_nodes; i++)
243 /** Read archive_node from binary data stream. */
244 istream &operator>>(istream &is, archive_node &n)
247 unsigned int num_props = read_unsigned(is);
248 n.props.resize(num_props);
249 for (unsigned int i=0; i<num_props; i++) {
250 unsigned int name_type = read_unsigned(is);
251 n.props[i].type = (archive_node::property_type)(name_type & 7);
252 n.props[i].name = name_type >> 3;
253 n.props[i].value = read_unsigned(is);
258 /** Read archive from binary data stream. */
259 istream &operator>>(istream &is, archive &ar)
263 is.get(c1); is.get(c2); is.get(c3); is.get(c4);
264 if (c1 != 'G' || c2 != 'A' || c3 != 'R' || c4 != 'C')
265 throw (std::runtime_error("not a GiNaC archive (signature not found)"));
266 unsigned int version = read_unsigned(is);
267 if (version > ARCHIVE_VERSION || version < ARCHIVE_VERSION - ARCHIVE_AGE)
268 throw (std::runtime_error("archive version " + ToString(version) + " cannot be read by this GiNaC library (which supports versions " + ToString(ARCHIVE_VERSION-ARCHIVE_AGE) + " thru " + ToString(ARCHIVE_VERSION)));
271 unsigned int num_atoms = read_unsigned(is);
272 ar.atoms.resize(num_atoms);
273 for (unsigned int i=0; i<num_atoms; i++)
274 getline(is, ar.atoms[i], '\0');
277 unsigned int num_exprs = read_unsigned(is);
278 ar.exprs.resize(num_exprs);
279 for (unsigned int i=0; i<num_exprs; i++) {
280 archive_atom name = read_unsigned(is);
281 archive_node_id root = read_unsigned(is);
282 ar.exprs[i] = archive::archived_ex(name, root);
286 unsigned int num_nodes = read_unsigned(is);
287 ar.nodes.resize(num_nodes, ar);
288 for (unsigned int i=0; i<num_nodes; i++)
294 /** Atomize a string (i.e. convert it into an ID number that uniquely
295 * represents the string). */
296 archive_atom archive::atomize(const string &s) const
298 // Search for string in atoms vector
299 vector<string>::const_iterator i = atoms.begin(), iend = atoms.end();
307 // Not found, add to atoms vector
312 /** Unatomize a string (i.e. convert the ID number back to the string). */
313 const string &archive::unatomize(archive_atom id) const
315 if (id >= atoms.size())
316 throw (std::range_error("archive::unatomizee(): atom ID out of range"));
322 /** Copy constructor of archive_node. */
323 archive_node::archive_node(const archive_node &other)
324 : a(other.a), props(other.props), has_expression(other.has_expression), e(other.e)
329 /** Assignment operator of archive_node. */
330 const archive_node &archive_node::operator=(const archive_node &other)
332 if (this != &other) {
335 has_expression = other.has_expression;
342 /** Recursively construct archive node from expression. */
343 archive_node::archive_node(archive &ar, const ex &expr)
344 : a(ar), has_expression(true), e(expr)
346 expr.bp->archive(*this);
350 /** Check if the archive_node stores the same expression as another
352 * @return "true" if expressions are the same */
353 bool archive_node::has_same_ex_as(const archive_node &other) const
355 if (!has_expression || !other.has_expression)
357 return e.bp == other.e.bp;
361 /** Add property of type "bool" to node. */
362 void archive_node::add_bool(const string &name, bool value)
364 props.push_back(property(a.atomize(name), PTYPE_BOOL, value));
367 /** Add property of type "unsigned int" to node. */
368 void archive_node::add_unsigned(const string &name, unsigned int value)
370 props.push_back(property(a.atomize(name), PTYPE_UNSIGNED, value));
373 /** Add property of type "string" to node. */
374 void archive_node::add_string(const string &name, const string &value)
376 props.push_back(property(a.atomize(name), PTYPE_STRING, a.atomize(value)));
379 /** Add property of type "ex" to node. */
380 void archive_node::add_ex(const string &name, const ex &value)
382 // Recursively create an archive_node and add its ID to the properties of this node
383 archive_node_id id = a.add_node(archive_node(a, value));
384 props.push_back(property(a.atomize(name), PTYPE_NODE, id));
388 /** Retrieve property of type "bool" from node.
389 * @return "true" if property was found, "false" otherwise */
390 bool archive_node::find_bool(const string &name, bool &ret) const
392 archive_atom name_atom = a.atomize(name);
393 vector<property>::const_iterator i = props.begin(), iend = props.end();
395 if (i->type == PTYPE_BOOL && i->name == name_atom) {
404 /** Retrieve property of type "unsigned" from node.
405 * @return "true" if property was found, "false" otherwise */
406 bool archive_node::find_unsigned(const string &name, unsigned int &ret) const
408 archive_atom name_atom = a.atomize(name);
409 vector<property>::const_iterator i = props.begin(), iend = props.end();
411 if (i->type == PTYPE_UNSIGNED && i->name == name_atom) {
420 /** Retrieve property of type "string" from node.
421 * @return "true" if property was found, "false" otherwise */
422 bool archive_node::find_string(const string &name, string &ret) const
424 archive_atom name_atom = a.atomize(name);
425 vector<property>::const_iterator i = props.begin(), iend = props.end();
427 if (i->type == PTYPE_STRING && i->name == name_atom) {
428 ret = a.unatomize(i->value);
436 /** Retrieve property of type "ex" from node.
437 * @return "true" if property was found, "false" otherwise */
438 bool archive_node::find_ex(const string &name, ex &ret, const lst &sym_lst, unsigned int index) const
440 archive_atom name_atom = a.atomize(name);
441 vector<property>::const_iterator i = props.begin(), iend = props.end();
442 unsigned int found_index = 0;
444 if (i->type == PTYPE_NODE && i->name == name_atom) {
445 if (found_index == index)
454 ret = a.get_node(i->value).unarchive(sym_lst);
459 /** Convert archive node to GiNaC expression. */
460 ex archive_node::unarchive(const lst &sym_lst) const
462 // Already unarchived? Then return cached unarchived expression.
466 // Find instantiation function for class specified in node
468 if (!find_string("class", class_name))
469 throw (std::runtime_error("archive node contains no class name"));
470 unarch_func f = find_unarch_func(class_name);
472 // Call instantiation function
473 e = f(*this, sym_lst);
474 has_expression = true;
479 /** Assignment operator of property. */
480 const archive_node::property &archive_node::property::operator=(const property &other)
482 if (this != &other) {
491 /** Clear all archived expressions. */
492 void archive::clear(void)
500 /** Delete cached unarchived expressions in all archive_nodes (mainly for debugging). */
501 void archive::forget(void)
503 vector<archive_node>::iterator i = nodes.begin(), iend = nodes.end();
510 /** Delete cached unarchived expressions from node (for debugging). */
511 void archive_node::forget(void)
513 has_expression = false;
518 /** Print archive to stream in ugly raw format (for debugging). */
519 void archive::printraw(ostream &os) const
524 vector<string>::const_iterator i = atoms.begin(), iend = atoms.end();
527 os << " " << id << " " << *i << endl;
534 os << "Expressions:\n";
536 vector<archived_ex>::const_iterator i = exprs.begin(), iend = exprs.end();
537 unsigned int index = 0;
539 os << " " << index << " \"" << unatomize(i->name) << "\" root node " << i->root << endl;
548 vector<archive_node>::const_iterator i = nodes.begin(), iend = nodes.end();
549 archive_node_id id = 0;
551 os << " " << id << " ";
558 /** Output archive_node to stream in ugly raw format (for debugging). */
559 void archive_node::printraw(ostream &os) const
561 // Dump cached unarchived expression
563 os << "(basic * " << e.bp << " = " << e << ")\n";
568 vector<property>::const_iterator i = props.begin(), iend = props.end();
572 case PTYPE_BOOL: os << "bool"; break;
573 case PTYPE_UNSIGNED: os << "unsigned"; break;
574 case PTYPE_STRING: os << "string"; break;
575 case PTYPE_NODE: os << "node"; break;
576 default: os << "<unknown>"; break;
578 os << " \"" << a.unatomize(i->name) << "\" " << i->value << endl;
583 /** Create a dummy archive. The intention is to fill archive_node's default ctor,
584 * which is currently a Cint-requirement. */
585 archive* archive_node::dummy_ar_creator(void)
587 static archive* some_ar = new archive;
592 #ifndef NO_NAMESPACE_GINAC
594 #endif // ndef NO_NAMESPACE_GINAC