#include <stdio.h>
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#include <stdlib.h>
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#include "tree.h"
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#include "utils.h"
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tree *read_tree(char *filename)
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{
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tree t = {0};
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FILE *fp = fopen(filename, "r");
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char *line;
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int last_parent = -1;
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int group_size = 0;
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int groups = 0;
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int n = 0;
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while((line=fgetl(fp)) != 0){
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char *id = calloc(256, sizeof(char));
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int parent = -1;
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sscanf(line, "%s %d", id, &parent);
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t.parent = realloc(t.parent, (n+1)*sizeof(int));
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t.parent[n] = parent;
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t.name = realloc(t.name, (n+1)*sizeof(char *));
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t.name[n] = id;
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if(parent != last_parent){
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++groups;
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t.group_size = realloc(t.group_size, groups * sizeof(int));
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t.group_size[groups - 1] = group_size;
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group_size = 0;
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last_parent = parent;
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}
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++n;
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++group_size;
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}
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++groups;
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t.group_size = realloc(t.group_size, groups * sizeof(int));
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t.group_size[groups - 1] = group_size;
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t.n = n;
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t.groups = groups;
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t.leaf = calloc(n, sizeof(int));
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int i;
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for(i = 0; i < n; ++i) t.leaf[i] = 1;
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for(i = 0; i < n; ++i) if(t.parent[i] >= 0) t.leaf[t.parent[i]] = 0;
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fclose(fp);
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tree *tree_ptr = calloc(1, sizeof(tree));
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*tree_ptr = t;
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//error(0);
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return tree_ptr;
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}
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