83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
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/********************************************************************
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* This file includes the top-level function of this library
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* which reads an XML of pin constraints to the associated
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* data structures
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*******************************************************************/
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#include <string>
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/* Headers from pugi XML library */
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#include "pugixml.hpp"
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#include "pugixml_util.hpp"
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/* Headers from vtr util library */
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#include "vtr_assert.h"
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#include "vtr_time.h"
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/* Headers from libopenfpga util library */
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#include "openfpga_port_parser.h"
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/* Headers from libarchfpga */
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#include "arch_error.h"
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#include "read_xml_util.h"
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#include "read_xml_pin_constraints.h"
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/********************************************************************
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* Parse XML codes of a <set_io> to an object of PinConstraint
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*******************************************************************/
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static
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void read_xml_pin_constraint(pugi::xml_node& xml_pin_constraint,
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const pugiutil::loc_data& loc_data,
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PinConstraints& pin_constraints) {
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openfpga::PortParser port_parser(get_attribute(xml_pin_constraint, "pin", loc_data).as_string());
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std::string net_name = get_attribute(xml_pin_constraint, "net", loc_data).as_string();
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/* Create a new pin constraint in the storage */
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PinConstraintId pin_constraint_id = pin_constraints.create_pin_constraint(port_parser.port(), net_name);
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if (false == pin_constraints.valid_pin_constraint_id(pin_constraint_id)) {
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archfpga_throw(loc_data.filename_c_str(), loc_data.line(xml_pin_constraint),
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"Fail to create pin constraint!\n");
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}
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}
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/********************************************************************
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* Parse XML codes about <pin_constraints> to an object of PinConstraints
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*******************************************************************/
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PinConstraints read_xml_pin_constraints(const char* pin_constraint_fname) {
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vtr::ScopedStartFinishTimer timer("Read Pin Constraints");
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PinConstraints pin_constraints;
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/* Parse the file */
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pugi::xml_document doc;
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pugiutil::loc_data loc_data;
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try {
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loc_data = pugiutil::load_xml(doc, pin_constraint_fname);
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pugi::xml_node xml_root = get_single_child(doc, "pin_constraints", loc_data);
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size_t num_pin_constraints = std::distance(xml_root.children().begin(), xml_root.children().end());
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/* Reserve memory space for the region */
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pin_constraints.reserve_pin_constraints(num_pin_constraints);
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for (pugi::xml_node xml_pin_constraint : xml_root.children()) {
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/* Error out if the XML child has an invalid name! */
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if (xml_pin_constraint.name() != std::string("set_io")) {
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bad_tag(xml_pin_constraint, loc_data, xml_root, {"set_io"});
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}
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read_xml_pin_constraint(xml_pin_constraint, loc_data, pin_constraints);
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}
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} catch (pugiutil::XmlError& e) {
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archfpga_throw(pin_constraint_fname, e.line(),
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"%s", e.what());
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}
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return pin_constraints;
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}
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