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tree.c
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/* ###############################################################
##
## C Tree Builder
##
## File: tree.c
##
## Revision 0.0.0.2 1996/04/03 10:26:06 kurt
## Added line,column to some printouts;
## addresses of nodes printed out, too.
## -- Kurt Cockrum <[email protected]>
##
## Revision 0.0.0.1 1996/04/03 10:08:46 kurt
## o missing return in make_for
## o misc. cleanups
## -- Kurt Cockrum <[email protected]>
##
## Revision 0.0.0.0 1996/03/30 02:49:41 kurt
## o added right curly brackets inside comments for benefit of vi
## o Addresses of tree nodes are printed in messages;
## minor content changes to some messages
## o Threw away ntype[]
## o Rev. 0.0 from
## -rw-r--r-- 1 1047 1047 44198 Aug 7 19:32
## ftp://ftp.cs.wisc.edu/coral/tmp/spf/ctree.0.01.tar.gz
## -- Kurt Cockrum <[email protected]>
##
## Programmer: Shaun Flisakowski
## Date: Jan 21, 1995
##
##
############################################################### */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include "tree.h"
#include "gram_parser.cpp.h"
#include "globals.h"
#include "token.h"
#include "prnttree.h"
/* ############################################################### */
if_node *make_if(tn_t type, context_t *contxt)
{
if_node *tmp_node;
tmp_node = (if_node *) HeapAlloc(Parse_TOS->node_heap);
if (tmp_node == NULL)
{
fputs("Error: Out of memory in make_if.\n",stderr);
exit(1);
}
tmp_node->hdr.which = IF_T;
tmp_node->hdr.type = type;
tmp_node->cond = (treenode *) NULL;
tmp_node->then_n = (treenode *) NULL;
tmp_node->else_n = (treenode *) NULL;
tmp_node->hdr.c_contxt = malloc(sizeof(context_t));
tmp_node->hdr.c_contxt->labels = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->labels) = *(contxt->labels);
tmp_node->hdr.c_contxt->syms = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->syms) = *(contxt->syms);
tmp_node->hdr.c_contxt->tags = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->tags) = *(contxt->tags);
return tmp_node;
}
/* ############################################################### */
for_node *make_for(tn_t type, context_t *contxt)
{
for_node *tmp_node;
tmp_node = (for_node *) HeapAlloc(Parse_TOS->node_heap);
if (tmp_node == NULL)
{
fputs("Error: Out of memory in make_for.\n",stderr);
exit(1);
}
tmp_node->hdr.which = FOR_T;
tmp_node->hdr.type = type;
tmp_node->init = (treenode *) NULL;
tmp_node->test = (treenode *) NULL;
tmp_node->incr = (treenode *) NULL;
tmp_node->stemnt = (treenode *) NULL;
tmp_node->hdr.c_contxt = malloc(sizeof(context_t));
tmp_node->hdr.c_contxt->labels = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->labels) = *(contxt->labels);
tmp_node->hdr.c_contxt->syms = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->syms) = *(contxt->syms);
tmp_node->hdr.c_contxt->tags = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->tags) = *(contxt->tags);
return tmp_node;
}
/* ############################################################### */
leafnode *make_leaf(tn_t type, context_t *contxt)
{
leafnode *tmp_node;
tmp_node = (leafnode *) HeapAlloc(Parse_TOS->node_heap);
if (tmp_node == NULL)
{
fputs("Error: Out of memory in make_leaf.\n",stderr);
exit(1);
}
tmp_node->hdr.which = LEAF_T;
tmp_node->hdr.type = type;
tmp_node->syment = NULL;
tmp_node->hdr.c_contxt = malloc(sizeof(context_t));
tmp_node->hdr.c_contxt->labels = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->labels) = *(contxt->labels);
tmp_node->hdr.c_contxt->syms = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->syms) = *(contxt->syms);
tmp_node->hdr.c_contxt->tags = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->tags) = *(contxt->tags);
return tmp_node;
}
/* ############################################################### */
treenode *make_node(tn_t type, context_t *contxt)
{
treenode *tmp_node;
tmp_node = (treenode *) HeapAlloc(Parse_TOS->node_heap);
if (tmp_node == NULL)
{
fputs("Error: Out of memory in make_node.\n",stderr);
exit(1);
}
tmp_node->hdr.which = NODE_T;
tmp_node->hdr.type = type;
tmp_node->lnode = (treenode *) NULL;
tmp_node->rnode = (treenode *) NULL;
tmp_node->hdr.c_contxt = malloc(sizeof(context_t));
tmp_node->hdr.c_contxt->labels = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->labels) = *(contxt->labels);
tmp_node->hdr.c_contxt->syms = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->syms) = *(contxt->syms);
tmp_node->hdr.c_contxt->tags = malloc(sizeof(symtab_t));
*(tmp_node->hdr.c_contxt->tags) = *(contxt->tags);
return tmp_node;
}
/* ############################################################### */
treenode *copy_tree(treenode *root)
{
leafnode *leaf, *newleaf;
if_node *ifn, *newif;
for_node *forn, *newfor;
treenode *newnode;
if (!root)
return(NULL);
switch (root->hdr.which){
case LEAF_T:
leaf = (leafnode *) root;
newleaf = make_leaf(leaf->hdr.type, leaf->hdr.c_contxt);
newleaf->hdr.line = leaf->hdr.line;
newleaf->hdr.col = leaf->hdr.col;
newleaf->hdr.tok = leaf->hdr.tok;
newleaf->data = leaf->data;
return((treenode *)newleaf);
case NODE_T:
newnode = make_node(root->hdr.type, root->hdr.c_contxt);
newnode->hdr.line = root->hdr.line;
newnode->hdr.col = root->hdr.col;
newnode->hdr.tok = root->hdr.tok;
newnode->lnode = copy_tree(root->lnode);
newnode->rnode = copy_tree(root->rnode);
return(newnode);
case IF_T:
ifn = (if_node *) root;
newif = make_if(ifn->hdr.type, ifn->hdr.c_contxt);
newif->hdr.line = ifn->hdr.line;
newif->hdr.col = ifn->hdr.col;
newif->hdr.tok = ifn->hdr.tok;
newif->cond = copy_tree(ifn->cond);
newif->then_n = copy_tree(ifn->then_n);
newif->then_n = copy_tree(ifn->else_n);
return((treenode *)newif);
case FOR_T:
forn = (for_node *) root;
newfor = make_for(forn->hdr.type, forn->hdr.c_contxt);
newfor->hdr.line = forn->hdr.line;
newfor->hdr.col = forn->hdr.col;
newfor->hdr.tok = forn->hdr.tok;
newfor->init = copy_tree(forn->init);
newfor->test = copy_tree(forn->test);
newfor->incr = copy_tree(forn->incr);
newfor->stemnt = copy_tree(forn->stemnt);
return((treenode *)newfor);
break;
default:
case NONE_T:
newnode = make_node(TN_EMPTY, root->hdr.c_contxt);
newnode->hdr.which = NONE_T;
return (newnode);
}
}
/* ############################################################### */
void free_tree(treenode *root)
{
leafnode *leaf;
if_node *ifn;
for_node *forn;
if (!root)
return;
switch (root->hdr.which){
case LEAF_T:
leaf = (leafnode *) root;
if (leaf->hdr.tok == STRING)
free(leaf->data.str);
break;
case NODE_T:
free_tree(root->lnode);
free_tree(root->rnode);
break;
case IF_T:
ifn = (if_node *) root;
free_tree(ifn->cond);
free_tree(ifn->then_n);
free_tree(ifn->else_n);
break;
case FOR_T:
forn = (for_node *) root;
free_tree(forn->init);
free_tree(forn->test);
free_tree(forn->incr);
free_tree(forn->stemnt);
break;
default:
case NONE_T:
break;
}
HeapFree(Parse_TOS->node_heap,root);
}
/* ############################################################### */
leafnode *leftmost(treenode *root)
{
if_node *ifn;
for_node *forn;
switch (root->hdr.which){
case LEAF_T:
return((leafnode *) root);
break;
case NODE_T:
if (root->lnode)
return(leftmost(root->lnode));
else if (root->rnode)
return(leftmost(root->rnode));
fprintf(stderr,
"Tree node %s with no children reached in leftmost.\n",
print_ptr(root));
break;
case IF_T:
ifn = (if_node *) root;
if (ifn->cond)
return(leftmost(ifn->cond));
else if (ifn->then_n)
return(leftmost(ifn->then_n));
else if (ifn->else_n)
return(leftmost(ifn->else_n));
fprintf(stderr,
"If-node %s with no children reached in leftmost.\n",
print_ptr(root));
break;
case FOR_T:
forn = (for_node *) root;
if (forn->init)
return(leftmost(forn->init));
else if (forn->test)
return(leftmost(forn->test));
else if (forn->incr)
return(leftmost(forn->incr));
else if (forn->stemnt)
return(leftmost(forn->stemnt));
fprintf(stderr,
"For-node %s with no children reached in leftmost.\n",
print_ptr(root));
break;
case NONE_T:
default:
fprintf(stderr, "Internal error: unknown node %s in leftmost;\n"
" type is: %s\n", print_ptr(root), name_of_nodetype(root->hdr.which));
break;
}
return((leafnode *) NULL);
}
/* ############################################################### */
leafnode *rightmost(treenode *root)
{
if_node *ifn;
for_node *forn;
switch (root->hdr.which){
case LEAF_T:
return((leafnode *) root);
break;
case NODE_T:
if (root->rnode)
return(rightmost(root->rnode));
else if (root->lnode)
return(rightmost(root->lnode));
fprintf(stderr,
"\nTree node %s with no children reached in rightmost.\n",
print_ptr(root));
break;
case IF_T:
ifn = (if_node *) root;
if (ifn->else_n)
return(rightmost(ifn->else_n));
else if (ifn->then_n)
return(rightmost(ifn->then_n));
else if (ifn->cond)
return(rightmost(ifn->cond));
fprintf(stderr,
"\nIf node %s with no children reached in rightmost.\n",
print_ptr(root));
break;
case FOR_T:
forn = (for_node *) root;
if (forn->stemnt)
return(rightmost(forn->stemnt));
else if (forn->incr)
return(rightmost(forn->incr));
else if (forn->test)
return(rightmost(forn->test));
else if (forn->init)
return(rightmost(forn->init));
fprintf(stderr,
"\nFor node %s with no children reached in rightmost.\n",
print_ptr(root));
break;
case NONE_T:
default:
fprintf(stderr, "Internal error: unknown node %s in rightmost;\n"
" type is: %s\n", print_ptr(root), name_of_nodetype(root->hdr.which));
break;
}
return((leafnode *) NULL);
}
/* ############################################################### */
/* Scans the typedef declaration node N for the ident
naming the new type. --jsh */
void
find_typedef_name(treenode *n, treenode *def, FindFunction find)
{
if (!n)
return;
switch(n->hdr.which)
{
case LEAF_T:
(find)((leafnode*) n, def, NULL);
break;
case NODE_T:
{
switch(n->hdr.type)
{
case TN_DECL:
find_typedef_name(n->rnode,def,find);
break;
case TN_ARRAY_DECL:
find_typedef_name(n->lnode,def,find);
break;
case TN_PNTR:
fprintf(stderr,
"Internal error: TN_PNTR reached in find_typedef_name!\n");
break;
case TN_DECL_LIST:
case TN_DECLS:
find_typedef_name(n->lnode,def,find);
find_typedef_name(n->rnode,def,find);
break;
case TN_FUNC_DECL:
if (n->lnode->hdr.type == TN_DECL)
find_typedef_name(n->lnode,def,find);
else
find_typedef_name(n->rnode,def,find);
break;
default:
fprintf(stderr,
"Internal error: "
"unknown node type (%s) in find_typedef_name\n",
name_of_node(n->hdr.type));
break;
}
}
break;
case IF_T:
case FOR_T:
case NONE_T:
default:
fprintf(stderr,
"Internal error: unknown node %s in find_typedef_name;\n"
" type is: %s\n", print_ptr(n), name_of_nodetype(n->hdr.which));
break;
}
}
/* ############################################################### */
void find_ident_name(treenode *n, treenode *def,
treenode *container, FindFunction find)
{
if (!n)
return;
switch(n->hdr.which)
{
case LEAF_T:
(find)((leafnode*) n,def,container);
break;
case NODE_T:
{
switch(n->hdr.type)
{
case TN_IDENT:
(find)((leafnode*) n,def,container);
break;
case TN_DECL:
find_ident_name(n->rnode,def,container,find);
break;
case TN_COMP_DECL:
find_ident_name(n->rnode,def,container,find);
break;
case TN_ASSIGN:
case TN_ARRAY_DECL:
find_ident_name(n->lnode,def,container,find);
break;
case TN_FIELD_LIST:
case TN_DECL_LIST:
case TN_DECLS:
case TN_PARAM_LIST:
find_ident_name(n->lnode,def,container,find);
find_ident_name(n->rnode,def,container,find);
break;
case TN_ELLIPSIS:
break;
case TN_PNTR:
break;
case TN_FUNC_DECL:
find_ident_name(n->lnode,def,container,find);
break;
default:
fprintf(stderr,
"Internal error: "
"unknown node type (%s) in find_ident_name\n",
name_of_node(n->hdr.type));
break;
}
}
break;
case IF_T:
case FOR_T:
case NONE_T:
default:
fprintf(stderr,
"Internal error: unknown node %s in find_ident_name;\n"
" type is: %s\n", print_ptr(n), name_of_nodetype(n->hdr.which));
break;
}
}
/* ############################################################### */
/* Scans the function declaration node N for the ident
naming the new function. */
leafnode *find_func_name(treenode *n)
{
for_node *f;
while((n != 0) && (n->hdr.which != LEAF_T))
{
switch(n->hdr.which)
{
case LEAF_T:
return (leafnode *)n;
case NODE_T:
switch(n->hdr.type)
{
case TN_DECL:
n = n->rnode;
break;
case TN_PNTR:
fprintf(stderr,
"Internal error: TN_PNTR reached in find_func_name!\n");
n = NULL;
break;
case TN_FUNC_DECL:
n = n->lnode;
break;
default:
fprintf(stderr,
"Internal error: "
"unknown node type (%s) in find_func_name\n",
name_of_node(n->hdr.type));
n = NULL;
break;
}
break;
case FOR_T:
f = (for_node *) n;
switch(n->hdr.type)
{
case TN_FUNC_DEF:
n = f->test;
break;
default:
break;
}
break;
case IF_T:
case NONE_T:
default:
fprintf(stderr,
"Internal error: unknown node %s in find_func_name;\n"
" type is: %s\n", print_ptr(n), name_of_nodetype(n->hdr.which));
n = NULL;
break;
}
}
return (leafnode*) n;
}
/* ############################################################### */
void find_params(treenode *decl, FindFunction find)
{
if (!decl)
return;
switch(decl->hdr.which)
{
case NODE_T:
{
switch(decl->hdr.type)
{
case TN_DECL:
find_ident_name(decl,decl,NULL,find);
break;
case TN_DECL_LIST:
case TN_DECLS:
find_params(decl->lnode,find);
find_params(decl->rnode,find);
break;
case TN_PARAM_LIST:
find_ident_name(decl->lnode,decl->lnode,NULL,find);
find_ident_name(decl->rnode,decl->rnode,NULL,find);
break;
case TN_FUNC_DECL:
find_params(decl->rnode,find);
break;
default:
fprintf(stderr,
"Internal error: "
"unknown node type (%s) in find_params\n",
name_of_node(decl->hdr.type));
break;
}
}
break;
case LEAF_T:
case IF_T:
case FOR_T:
case NONE_T:
default:
fprintf(stderr,
"Internal error: unknown node %s in find_params;\n"
" type is: %s\n", print_ptr(decl), name_of_nodetype(decl->hdr.which));
break;
}
}
/* ############################################################### */
void find_components(treenode *decl, treenode *def,
treenode *container, FindFunction find)
{
if (!decl)
return;
switch(decl->hdr.which)
{
case NODE_T:
{
switch(decl->hdr.type)
{
case TN_COMP_DECL:
case TN_DECL:
find_ident_name(decl,decl,container,find);
break;
case TN_DECL_LIST:
case TN_DECLS:
find_components(decl->lnode,def,container,find);
find_components(decl->rnode,def,container,find);
break;
case TN_FIELD_LIST:
find_components(decl->lnode,def,container,find);
find_components(decl->rnode,def,container,find);
break;
case TN_FUNC_DECL:
find_components(decl->rnode,def,container,find);
break;
default:
fprintf(stderr,
"Internal error: "
"unknown node type (%s) in find_components\n",
name_of_node(decl->hdr.type));
break;
}
}
break;
case LEAF_T:
case IF_T:
case FOR_T:
case NONE_T:
default:
fprintf(stderr,
"Internal error: unknown node %s in find_components;\n"
" type is: %s\n", print_ptr(decl), name_of_nodetype(decl->hdr.which));
break;
}
}
/* ############################################################### */
#define SHOW(X) #X
char*
name_of_node(tn_t val)
{
switch (val)
{
case TN_EMPTY:
return SHOW(TN_EMPTY);
case TN_FUNC_DEF:
return SHOW(TN_FUNC_DEF);
case TN_FUNC_DECL:
return SHOW(TN_FUNC_DECL);
case TN_FUNC_CALL:
return SHOW(TN_FUNC_CALL);
case TN_BLOCK:
return SHOW(TN_BLOCK);
case TN_DECL:
return SHOW(TN_DECL);
case TN_ARRAY_DECL:
return SHOW(TN_ARRAY_DECL);
case TN_TRANS_LIST:
return SHOW(TN_TRANS_LIST);
case TN_DECL_LIST:
return SHOW(TN_DECL_LIST);
case TN_DECLS:
return SHOW(TN_DECLS);
case TN_STEMNT_LIST:
return SHOW(TN_STEMNT_LIST);
case TN_EXPR_LIST:
return SHOW(TN_EXPR_LIST);
case TN_NAME_LIST:
return SHOW(TN_NAME_LIST);
case TN_ENUM_LIST:
return SHOW(TN_ENUM_LIST);
case TN_FIELD_LIST:
return SHOW(TN_FIELD_LIST);
case TN_PARAM_LIST:
return SHOW(TN_PARAM_LIST);
case TN_IDENT_LIST:
return SHOW(TN_IDENT_LIST);
case TN_COMP_DECL:
return SHOW(TN_COMP_DECL);
case TN_BIT_FIELD:
return SHOW(TN_BIT_FIELD);
case TN_PNTR:
return SHOW(TN_PNTR);
case TN_TYPE_LIST:
return SHOW(TN_TYPE_LIST);
case TN_TYPE_NME:
return SHOW(TN_TYPE_NME);
case TN_INIT_LIST:
return SHOW(TN_INIT_LIST);
case TN_INIT_BLK:
return SHOW(TN_INIT_BLK);
case TN_OBJ_DEF:
return SHOW(TN_OBJ_DEF);
case TN_OBJ_REF:
return SHOW(TN_OBJ_REF);
case TN_CAST:
return SHOW(TN_CAST);
case TN_IF:
return SHOW(TN_IF);
case TN_ASSIGN:
return SHOW(TN_ASSIGN);
case TN_JUMP:
return SHOW(TN_JUMP);
case TN_FOR:
return SHOW(TN_FOR);
case TN_WHILE:
return SHOW(TN_WHILE);
case TN_DOWHILE:
return SHOW(TN_DOWHILE);
case TN_SWITCH:
return SHOW(TN_SWITCH);
case TN_LABEL:
return SHOW(TN_LABEL);
case TN_STEMNT:
return SHOW(TN_STEMNT);
case TN_INDEX:
return SHOW(TN_INDEX);
case TN_DEREF:
return SHOW(TN_DEREF);
case TN_SELECT:
return SHOW(TN_SELECT);
case TN_EXPR:
return SHOW(TN_EXPR);
case TN_COND_EXPR:
return SHOW(TN_COND_EXPR);
case TN_COMMENT:
return SHOW(TN_COMMENT);
case TN_CPP:
return SHOW(TN_CPP);
case TN_ELLIPSIS:
return SHOW(TN_ELLIPSIS);
case TN_IDENT:
return SHOW(TN_IDENT);
case TN_TYPE:
return SHOW(TN_TYPE);
case TN_STRING:
return SHOW(TN_STRING);
case TN_INT:
return SHOW(TN_INT);
case TN_REAL:
return SHOW(TN_REAL);
default:
return "<Unknown Node Name>";
}
}
char*
name_of_nodetype(node_type val)
{
switch (val)
{
case NONE_T:
return SHOW(NONE_T);
case LEAF_T:
return SHOW(LEAF_T);
case IF_T:
return SHOW(IF_T);
case FOR_T:
return SHOW(FOR_T);
case NODE_T:
return SHOW(NODE_T);
default:
return "<Unknown Node Type>";
}
#undef SHOW
}
/* ############################################################### */