blocks.cpp

/*
 * Read Blocks from file and convert to vectors of entities
 *
 * Author:
 *   Matt Squires <squiresm@colorado.edu>
 *
 * Copyright (C) 2005 Matt Squires
 *
 * Released under GNU GPL and LGPL, read the file 'GPL.txt' and 'LGPL.txt' for details
 */


#include "blocks.h"
#include <iostream>

#include <stdlib.h>
#include <string.h>

block::block(const std::vector<std::vector<dxfpair> > &sections) : entities(sections) {
	// Inherit most of the functionality of the entitites section
	
	basic_entity(sections[0]);
	block_info(sections[0]);
}

const char* block::name() const {
	return block_name.c_str();
}


void block::block_info(const std::vector<dxfpair> &info) {
	for (const auto &i : info) {
		switch(i.group_code) {
			case 2: // Block name
				block_name = i.value_str();
				break;
		}
	}
}


blocks::blocks(const std::vector<std::vector<dxfpair> > &sections) {
	// Read the main information about the entities section and then put it in the enetites class
	
	size_t n_loop = sections.size();
	n_loop--;
	//for(int i = 0; i < (sections.size()-1); i++) { // It is odd but the last value seems to be bad so don't use it
	// I am not really sure if I need the -1.  I needed it once upon a time to make things work but I don't have time to test it well right now 
	// But sections.size() is an unsigned int so when you subtract 1 it becomes 4294967295 and tries to run the loop so work around that by making n_loop that is signed
	for (int i = 0; i < n_loop; i++) { // It is odd but the last value seems to be bad so don't use it
        std::vector<std::vector<dxfpair> > ents;
		
		// Get everything from the start of the BLOCK designation to an ENDBLK value
		if (strcmp(sections[i][0].value_char(), "BLOCK") == 0 && (i < sections.size())) {
			do {
				ents.push_back(sections[i]);
			} while (strcmp(sections[++i][0].value_char(), "ENDBLK") != 0  && (i < sections.size()-1) );
			blocks_blocks.push_back(block(ents));
		}
	}
}

const block &blocks::ret_block(const char *block_name) const {
	for (const auto &b : blocks_blocks) {
		if (strcmp(b.name(), block_name) == 0 )
            return b;
	}
	return blocks_blocks[0];
}