98 lines
1.6 KiB
C
98 lines
1.6 KiB
C
/* N O D E O F A N A B S T R A C T P A R S E T R E E */
|
|
|
|
#include "parameters.h"
|
|
#include "debug.h"
|
|
|
|
#include <alloc.h>
|
|
#include <em_arith.h>
|
|
#include <em_label.h>
|
|
#include <system.h>
|
|
|
|
#include "LLlex.h"
|
|
#include "node.h"
|
|
#include "type.h"
|
|
|
|
struct node *
|
|
MkNode(class, left, right, token)
|
|
struct node *left, *right;
|
|
struct token *token;
|
|
{
|
|
/* Create a node and initialize it with the given parameters
|
|
*/
|
|
register struct node *nd = new_node();
|
|
|
|
nd->nd_left = left;
|
|
nd->nd_right = right;
|
|
nd->nd_token = *token;
|
|
nd->nd_class = class;
|
|
nd->nd_type = error_type;
|
|
return nd;
|
|
}
|
|
|
|
struct node *
|
|
MkLeaf(class, token)
|
|
struct token *token;
|
|
{
|
|
register struct node *nd = new_node();
|
|
|
|
nd->nd_left = nd->nd_right = NULLNODE;
|
|
nd->nd_token = *token;
|
|
nd->nd_type = error_type;
|
|
nd->nd_class = class;
|
|
return nd;
|
|
}
|
|
|
|
void
|
|
FreeNode(nd)
|
|
register struct node *nd;
|
|
{
|
|
/* Put nodes that are no longer needed back onto the free list
|
|
*/
|
|
if( !nd ) return;
|
|
FreeNode(nd->nd_left);
|
|
FreeNode(nd->nd_right);
|
|
free_node(nd);
|
|
}
|
|
|
|
NodeCrash(expp)
|
|
struct node *expp;
|
|
{
|
|
crash("Illegal node %d", expp->nd_class);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
|
|
extern char *symbol2str();
|
|
|
|
indnt(lvl)
|
|
{
|
|
while( lvl-- )
|
|
print(" ");
|
|
}
|
|
|
|
printnode(nd, lvl)
|
|
register struct node *nd;
|
|
{
|
|
indnt(lvl);
|
|
print("Class: %d; Symbol: %s\n", nd->nd_class, symbol2str(nd->nd_symb));
|
|
if( nd->nd_type ) {
|
|
indnt(lvl);
|
|
print("Type: ");
|
|
DumpType(nd->nd_type);
|
|
print("\n");
|
|
}
|
|
}
|
|
|
|
PrNode(nd, lvl)
|
|
register struct node *nd;
|
|
{
|
|
if( !nd ) {
|
|
indnt(lvl); print("<nilnode>\n");
|
|
return;
|
|
}
|
|
PrNode(nd->nd_left, lvl + 1);
|
|
printnode(nd, lvl);
|
|
PrNode(nd->nd_right, lvl + 1);
|
|
}
|
|
#endif
|