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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include "rope.h"
struct rope_s {
size_t len;
char *str;
struct rope_s *left, *right, *parent;
};
rope* rope_new()
{
rope *tmp;
tmp = malloc(sizeof(rope));
assert(tmp);
tmp->len = 0;
tmp->str = NULL;
tmp->left = NULL;
tmp->right = NULL;
tmp->parent = NULL;
return tmp;
}
void rope_debug_print_aux(root, s)
rope *root;
int s;
{
int i;
for (i = 0; i < s; i++)
printf("| ");
if (!root) {
printf("\n");
return;
}
#ifdef ROPE_DEBUG_PARENT
printf("[%p]\n", root->parent);
#endif
printf("{len:%d,str:\'%s\'}[%p]\n", root->len, root->str, root);
if (root->str)
return;
rope_debug_print_aux(root->left, ++s);
rope_debug_print_aux(root->right, s);
}
void rope_debug_print(root)
rope *root;
{
rope_debug_print_aux(root, 0);
}
void rope_print(root)
rope *root;
{
if (!root)
return;
if (root->str)
printf("%s", root->str);
rope_print(root->left);
rope_print(root->right);
}
size_t rope_len(root)
rope *root;
{
if (!root)
return 0;
if (root->str)
return root->len;
return rope_len(root->left) + rope_len(root->right);
}
size_t rope_relen(root)
rope *root;
{
if (!root)
return 0;
if (root->str)
return root->len;
return root->len = rope_relen(root->left) + rope_len(root->right);
}
rope* str_to_rope(str)
char *str;
{
rope *tmp;
if (!str)
return NULL;
tmp = rope_new();
tmp->len = strlen(str);
tmp->str = strdup(str);
return tmp;
}
rope* rope_concat(node1, node2)
rope *node1, *node2;
{
rope *tmp;
if (!node1 || !node2)
return node1 ? node1 : node2;
tmp = rope_new();
tmp->len = rope_len(node1);
tmp->left = node1;
tmp->right = node2;
node1->parent = tmp;
node2->parent = tmp;
return tmp;
}
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