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-
- /*
- * xrt.cpp - cross-reference table implementation
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
-
- #include "ln_seq.h"
- #include "xrt.h"
-
- struct treenode
- {
- char *word;
- ln_seq lines;
- treenode *left, *right;
- };
-
- static treenode *addtree
- (treenode *t, char *w, unsigned n)
- {
- int cond;
-
- if (t == NULL)
- {
- t = new treenode;
- t->word
- = strcpy((char *)malloc(strlen(w) + 1), w);
- t->lines.add(n);
- t->left = t->right = NULL;
- }
- else if ((cond = strcmp(w, t->word)) == 0)
- t->lines.add(n);
- else if (cond < 0)
- t->left = addtree(t->left, w, n);
- else
- t->right = addtree(t->right, w, n);
- return t;
- }
-
- static void printtree(treenode *t)
- {
- if (t != NULL)
- {
- printtree(t->left);
- printf("%12s: ", t->word);
- t->lines.print();
- printf("\n");
- printtree(t->right);
- }
- }
-
- static treenode *root = NULL;
-
- void xrt_add(char *w, unsigned n)
- {
- root = addtree(root, w, n);
- }
-
- void xrt_print(void)
- {
- printtree(root);
- }
-
-